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Annotation of mandoc/roff.c, Revision 1.389

1.389   ! schwarze    1: /* $Id: roff.c,v 1.388 2022/05/19 15:37:47 schwarze Exp $ */
1.1       kristaps    2: /*
1.381     schwarze    3:  * Copyright (c) 2010-2015, 2017-2022 Ingo Schwarze <schwarze@openbsd.org>
1.267     schwarze    4:  * Copyright (c) 2008-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
1.1       kristaps    5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
1.66      kristaps    7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
1.1       kristaps    9:  *
1.106     kristaps   10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.66      kristaps   11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.106     kristaps   12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.66      kristaps   13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.372     schwarze   17:  *
                     18:  * Implementation of the roff(7) parser for mandoc(1).
1.1       kristaps   19:  */
1.66      kristaps   20: #include "config.h"
1.225     schwarze   21:
                     22: #include <sys/types.h>
1.30      kristaps   23:
1.67      kristaps   24: #include <assert.h>
1.85      kristaps   25: #include <ctype.h>
1.245     schwarze   26: #include <limits.h>
1.295     schwarze   27: #include <stddef.h>
                     28: #include <stdint.h>
1.178     schwarze   29: #include <stdio.h>
1.1       kristaps   30: #include <stdlib.h>
1.67      kristaps   31: #include <string.h>
1.1       kristaps   32:
1.201     schwarze   33: #include "mandoc_aux.h"
1.295     schwarze   34: #include "mandoc_ohash.h"
1.345     schwarze   35: #include "mandoc.h"
1.265     schwarze   36: #include "roff.h"
1.349     schwarze   37: #include "mandoc_parse.h"
1.226     schwarze   38: #include "libmandoc.h"
1.266     schwarze   39: #include "roff_int.h"
1.346     schwarze   40: #include "tbl_parse.h"
1.347     schwarze   41: #include "eqn_parse.h"
1.82      kristaps   42:
1.355     schwarze   43: /*
                     44:  * ASCII_ESC is used to signal from roff_getarg() to roff_expand()
                     45:  * that an escape sequence resulted from copy-in processing and
                     46:  * needs to be checked or interpolated.  As it is used nowhere
                     47:  * else, it is defined here rather than in a header file.
                     48:  */
                     49: #define        ASCII_ESC       27
                     50:
1.170     schwarze   51: /* Maximum number of string expansions per line, to break infinite loops. */
                     52: #define        EXPAND_LIMIT    1000
                     53:
1.315     schwarze   54: /* Types of definitions of macros and strings. */
                     55: #define        ROFFDEF_USER    (1 << 1)  /* User-defined. */
                     56: #define        ROFFDEF_PRE     (1 << 2)  /* Predefined. */
                     57: #define        ROFFDEF_REN     (1 << 3)  /* Renamed standard macro. */
                     58: #define        ROFFDEF_STD     (1 << 4)  /* mdoc(7) or man(7) macro. */
                     59: #define        ROFFDEF_ANY     (ROFFDEF_USER | ROFFDEF_PRE | \
                     60:                         ROFFDEF_REN | ROFFDEF_STD)
1.325     schwarze   61: #define        ROFFDEF_UNDEF   (1 << 5)  /* Completely undefined. */
1.315     schwarze   62:
1.266     schwarze   63: /* --- data types --------------------------------------------------------- */
                     64:
1.147     kristaps   65: /*
1.167     kristaps   66:  * An incredibly-simple string buffer.
                     67:  */
1.94      kristaps   68: struct roffstr {
1.167     kristaps   69:        char            *p; /* nil-terminated buffer */
                     70:        size_t           sz; /* saved strlen(p) */
1.166     kristaps   71: };
                     72:
                     73: /*
1.167     kristaps   74:  * A key-value roffstr pair as part of a singly-linked list.
1.166     kristaps   75:  */
                     76: struct roffkv {
                     77:        struct roffstr   key;
                     78:        struct roffstr   val;
                     79:        struct roffkv   *next; /* next in list */
1.94      kristaps   80: };
                     81:
1.180     schwarze   82: /*
                     83:  * A single number register as part of a singly-linked list.
                     84:  */
                     85: struct roffreg {
                     86:        struct roffstr   key;
1.181     schwarze   87:        int              val;
1.327     schwarze   88:        int              step;
1.180     schwarze   89:        struct roffreg  *next;
                     90: };
                     91:
1.295     schwarze   92: /*
                     93:  * Association of request and macro names with token IDs.
                     94:  */
                     95: struct roffreq {
                     96:        enum roff_tok    tok;
                     97:        char             name[];
                     98: };
                     99:
1.339     schwarze  100: /*
                    101:  * A macro processing context.
                    102:  * More than one is needed when macro calls are nested.
                    103:  */
                    104: struct mctx {
                    105:        char            **argv;
                    106:        int              argc;
                    107:        int              argsz;
                    108: };
                    109:
1.67      kristaps  110: struct roff {
1.296     schwarze  111:        struct roff_man *man; /* mdoc or man parser */
1.67      kristaps  112:        struct roffnode *last; /* leaf of stack */
1.339     schwarze  113:        struct mctx     *mstack; /* stack of macro contexts */
1.223     schwarze  114:        int             *rstack; /* stack of inverted `ie' values */
1.295     schwarze  115:        struct ohash    *reqtab; /* request lookup table */
1.180     schwarze  116:        struct roffreg  *regtab; /* number registers */
1.166     kristaps  117:        struct roffkv   *strtab; /* user-defined strings & macros */
1.306     schwarze  118:        struct roffkv   *rentab; /* renamed strings & macros */
1.167     kristaps  119:        struct roffkv   *xmbtab; /* multi-byte trans table (`tr') */
                    120:        struct roffstr  *xtab; /* single-byte trans table (`tr') */
1.106     kristaps  121:        const char      *current_string; /* value of last called user macro */
1.118     kristaps  122:        struct tbl_node *first_tbl; /* first table parsed */
                    123:        struct tbl_node *last_tbl; /* last table parsed */
                    124:        struct tbl_node *tbl; /* current table being parsed */
1.319     schwarze  125:        struct eqn_node *last_eqn; /* equation parser */
                    126:        struct eqn_node *eqn; /* active equation parser */
1.230     schwarze  127:        int              eqn_inline; /* current equation is inline */
1.223     schwarze  128:        int              options; /* parse options */
1.339     schwarze  129:        int              mstacksz; /* current size of mstack */
                    130:        int              mstackpos; /* position in mstack */
1.223     schwarze  131:        int              rstacksz; /* current size limit of rstack */
                    132:        int              rstackpos; /* position in rstack */
1.227     schwarze  133:        int              format; /* current file in mdoc or man format */
1.223     schwarze  134:        char             control; /* control character */
1.303     schwarze  135:        char             escape; /* escape character */
1.79      kristaps  136: };
                    137:
1.364     schwarze  138: /*
                    139:  * A macro definition, condition, or ignored block.
                    140:  */
1.67      kristaps  141: struct roffnode {
1.294     schwarze  142:        enum roff_tok    tok; /* type of node */
1.67      kristaps  143:        struct roffnode *parent; /* up one in stack */
                    144:        int              line; /* parse line */
                    145:        int              col; /* parse col */
1.106     kristaps  146:        char            *name; /* node name, e.g. macro name */
1.364     schwarze  147:        char            *end; /* custom end macro of the block */
                    148:        int              endspan; /* scope to: 1=eol 2=next line -1=\} */
                    149:        int              rule; /* content is: 1=evaluated 0=skipped */
1.67      kristaps  150: };
                    151:
                    152: #define        ROFF_ARGS        struct roff *r, /* parse ctx */ \
1.294     schwarze  153:                         enum roff_tok tok, /* tok of macro */ \
1.238     schwarze  154:                         struct buf *buf, /* input buffer */ \
1.67      kristaps  155:                         int ln, /* parse line */ \
1.75      kristaps  156:                         int ppos, /* original pos in buffer */ \
                    157:                         int pos, /* current pos in buffer */ \
1.74      kristaps  158:                         int *offs /* reset offset of buffer data */
1.67      kristaps  159:
1.340     schwarze  160: typedef        int (*roffproc)(ROFF_ARGS);
1.67      kristaps  161:
                    162: struct roffmac {
1.79      kristaps  163:        roffproc         proc; /* process new macro */
                    164:        roffproc         text; /* process as child text of macro */
                    165:        roffproc         sub; /* process as child of macro */
                    166:        int              flags;
                    167: #define        ROFFMAC_STRUCT  (1 << 0) /* always interpret */
1.67      kristaps  168: };
                    169:
1.141     kristaps  170: struct predef {
                    171:        const char      *name; /* predefined input name */
                    172:        const char      *str; /* replacement symbol */
                    173: };
                    174:
                    175: #define        PREDEF(__name, __str) \
                    176:        { (__name), (__str) },
                    177:
1.266     schwarze  178: /* --- function prototypes ------------------------------------------------ */
                    179:
1.340     schwarze  180: static int              roffnode_cleanscope(struct roff *);
                    181: static int              roffnode_pop(struct roff *);
1.294     schwarze  182: static void             roffnode_push(struct roff *, enum roff_tok,
1.155     kristaps  183:                                const char *, int, int);
1.346     schwarze  184: static void             roff_addtbl(struct roff_man *, int, struct tbl_node *);
1.340     schwarze  185: static int              roff_als(ROFF_ARGS);
                    186: static int              roff_block(ROFF_ARGS);
                    187: static int              roff_block_text(ROFF_ARGS);
                    188: static int              roff_block_sub(ROFF_ARGS);
1.364     schwarze  189: static int              roff_break(ROFF_ARGS);
1.340     schwarze  190: static int              roff_cblock(ROFF_ARGS);
                    191: static int              roff_cc(ROFF_ARGS);
                    192: static int              roff_ccond(struct roff *, int, int);
1.341     schwarze  193: static int              roff_char(ROFF_ARGS);
1.340     schwarze  194: static int              roff_cond(ROFF_ARGS);
1.375     schwarze  195: static int              roff_cond_checkend(ROFF_ARGS);
1.340     schwarze  196: static int              roff_cond_text(ROFF_ARGS);
                    197: static int              roff_cond_sub(ROFF_ARGS);
                    198: static int              roff_ds(ROFF_ARGS);
                    199: static int              roff_ec(ROFF_ARGS);
                    200: static int              roff_eo(ROFF_ARGS);
                    201: static int              roff_eqndelim(struct roff *, struct buf *, int);
1.372     schwarze  202: static int              roff_evalcond(struct roff *, int, char *, int *);
1.234     kristaps  203: static int              roff_evalnum(struct roff *, int,
                    204:                                const char *, int *, int *, int);
                    205: static int              roff_evalpar(struct roff *, int,
1.261     schwarze  206:                                const char *, int *, int *, int);
1.198     schwarze  207: static int              roff_evalstrcond(const char *, int *);
1.355     schwarze  208: static int              roff_expand(struct roff *, struct buf *,
                    209:                                int, int, char);
1.388     schwarze  210: static void             roff_expand_patch(struct buf *, int,
                    211:                                const char *, int);
1.155     kristaps  212: static void             roff_free1(struct roff *);
1.180     schwarze  213: static void             roff_freereg(struct roffreg *);
1.167     kristaps  214: static void             roff_freestr(struct roffkv *);
1.212     schwarze  215: static size_t           roff_getname(struct roff *, char **, int, int);
1.261     schwarze  216: static int              roff_getnum(const char *, int *, int *, int);
1.184     schwarze  217: static int              roff_getop(const char *, int *, char *);
1.327     schwarze  218: static int              roff_getregn(struct roff *,
                    219:                                const char *, size_t, char);
1.273     schwarze  220: static int              roff_getregro(const struct roff *,
                    221:                                const char *name);
1.325     schwarze  222: static const char      *roff_getstrn(struct roff *,
1.315     schwarze  223:                                const char *, size_t, int *);
1.271     schwarze  224: static int              roff_hasregn(const struct roff *,
                    225:                                const char *, size_t);
1.340     schwarze  226: static int              roff_insec(ROFF_ARGS);
                    227: static int              roff_it(ROFF_ARGS);
                    228: static int              roff_line_ignore(ROFF_ARGS);
1.265     schwarze  229: static void             roff_man_alloc1(struct roff_man *);
                    230: static void             roff_man_free1(struct roff_man *);
1.340     schwarze  231: static int              roff_manyarg(ROFF_ARGS);
1.384     schwarze  232: static int              roff_mc(ROFF_ARGS);
1.358     schwarze  233: static int              roff_noarg(ROFF_ARGS);
1.340     schwarze  234: static int              roff_nop(ROFF_ARGS);
                    235: static int              roff_nr(ROFF_ARGS);
                    236: static int              roff_onearg(ROFF_ARGS);
1.294     schwarze  237: static enum roff_tok    roff_parse(struct roff *, char *, int *,
1.214     schwarze  238:                                int, int);
1.387     schwarze  239: static int              roff_parse_comment(struct roff *, struct buf *,
                    240:                                int, int, char);
1.340     schwarze  241: static int              roff_parsetext(struct roff *, struct buf *,
1.305     schwarze  242:                                int, int *);
1.340     schwarze  243: static int              roff_renamed(ROFF_ARGS);
1.386     schwarze  244: static int              roff_req_or_macro(ROFF_ARGS);
1.340     schwarze  245: static int              roff_return(ROFF_ARGS);
                    246: static int              roff_rm(ROFF_ARGS);
                    247: static int              roff_rn(ROFF_ARGS);
                    248: static int              roff_rr(ROFF_ARGS);
1.326     schwarze  249: static void             roff_setregn(struct roff *, const char *,
1.327     schwarze  250:                                size_t, int, char, int);
1.94      kristaps  251: static void             roff_setstr(struct roff *,
1.106     kristaps  252:                                const char *, const char *, int);
1.207     schwarze  253: static void             roff_setstrn(struct roffkv **, const char *,
1.164     kristaps  254:                                size_t, const char *, size_t, int);
1.340     schwarze  255: static int              roff_shift(ROFF_ARGS);
                    256: static int              roff_so(ROFF_ARGS);
                    257: static int              roff_tr(ROFF_ARGS);
                    258: static int              roff_Dd(ROFF_ARGS);
                    259: static int              roff_TE(ROFF_ARGS);
                    260: static int              roff_TS(ROFF_ARGS);
                    261: static int              roff_EQ(ROFF_ARGS);
                    262: static int              roff_EN(ROFF_ARGS);
                    263: static int              roff_T_(ROFF_ARGS);
                    264: static int              roff_unsupp(ROFF_ARGS);
                    265: static int              roff_userdef(ROFF_ARGS);
1.67      kristaps  266:
1.266     schwarze  267: /* --- constant data ------------------------------------------------------ */
                    268:
1.261     schwarze  269: #define        ROFFNUM_SCALE   (1 << 0)  /* Honour scaling in roff_getnum(). */
                    270: #define        ROFFNUM_WHITE   (1 << 1)  /* Skip whitespace in roff_evalnum(). */
                    271:
1.294     schwarze  272: const char *__roff_name[MAN_MAX + 1] = {
1.358     schwarze  273:        "br",           "ce",           "fi",           "ft",
                    274:        "ll",           "mc",           "nf",
                    275:        "po",           "rj",           "sp",
1.312     schwarze  276:        "ta",           "ti",           NULL,
1.294     schwarze  277:        "ab",           "ad",           "af",           "aln",
                    278:        "als",          "am",           "am1",          "ami",
                    279:        "ami1",         "as",           "as1",          "asciify",
                    280:        "backtrace",    "bd",           "bleedat",      "blm",
                    281:         "box",         "boxa",         "bp",           "BP",
                    282:        "break",        "breakchar",    "brnl",         "brp",
1.305     schwarze  283:        "brpnl",        "c2",           "cc",
1.294     schwarze  284:        "cf",           "cflags",       "ch",           "char",
                    285:        "chop",         "class",        "close",        "CL",
                    286:        "color",        "composite",    "continue",     "cp",
                    287:        "cropat",       "cs",           "cu",           "da",
                    288:        "dch",          "Dd",           "de",           "de1",
                    289:        "defcolor",     "dei",          "dei1",         "device",
                    290:        "devicem",      "di",           "do",           "ds",
                    291:        "ds1",          "dwh",          "dt",           "ec",
                    292:        "ecr",          "ecs",          "el",           "em",
                    293:        "EN",           "eo",           "EP",           "EQ",
                    294:        "errprint",     "ev",           "evc",          "ex",
                    295:        "fallback",     "fam",          "fc",           "fchar",
                    296:        "fcolor",       "fdeferlig",    "feature",      "fkern",
                    297:        "fl",           "flig",         "fp",           "fps",
                    298:        "fschar",       "fspacewidth",  "fspecial",     "ftr",
                    299:        "fzoom",        "gcolor",       "hc",           "hcode",
                    300:        "hidechar",     "hla",          "hlm",          "hpf",
                    301:        "hpfa",         "hpfcode",      "hw",           "hy",
                    302:        "hylang",       "hylen",        "hym",          "hypp",
                    303:        "hys",          "ie",           "if",           "ig",
                    304:        "index",        "it",           "itc",          "IX",
                    305:        "kern",         "kernafter",    "kernbefore",   "kernpair",
                    306:        "lc",           "lc_ctype",     "lds",          "length",
                    307:        "letadj",       "lf",           "lg",           "lhang",
                    308:        "linetabs",     "lnr",          "lnrf",         "lpfx",
1.304     schwarze  309:        "ls",           "lsm",          "lt",
1.294     schwarze  310:        "mediasize",    "minss",        "mk",           "mso",
                    311:        "na",           "ne",           "nh",           "nhychar",
                    312:        "nm",           "nn",           "nop",          "nr",
                    313:        "nrf",          "nroff",        "ns",           "nx",
                    314:        "open",         "opena",        "os",           "output",
                    315:        "padj",         "papersize",    "pc",           "pev",
                    316:        "pi",           "PI",           "pl",           "pm",
1.312     schwarze  317:        "pn",           "pnr",          "ps",
1.294     schwarze  318:        "psbb",         "pshape",       "pso",          "ptr",
                    319:        "pvs",          "rchar",        "rd",           "recursionlimit",
1.309     schwarze  320:        "return",       "rfschar",      "rhang",
1.294     schwarze  321:        "rm",           "rn",           "rnn",          "rr",
                    322:        "rs",           "rt",           "schar",        "sentchar",
                    323:        "shc",          "shift",        "sizes",        "so",
                    324:        "spacewidth",   "special",      "spreadwarn",   "ss",
                    325:        "sty",          "substring",    "sv",           "sy",
1.300     schwarze  326:        "T&",           "tc",           "TE",
1.301     schwarze  327:        "TH",           "tkf",          "tl",
1.294     schwarze  328:        "tm",           "tm1",          "tmc",          "tr",
                    329:        "track",        "transchar",    "trf",          "trimat",
                    330:        "trin",         "trnt",         "troff",        "TS",
                    331:        "uf",           "ul",           "unformat",     "unwatch",
                    332:        "unwatchn",     "vpt",          "vs",           "warn",
                    333:        "warnscale",    "watch",        "watchlength",  "watchn",
                    334:        "wh",           "while",        "write",        "writec",
                    335:        "writem",       "xflag",        ".",            NULL,
1.306     schwarze  336:        NULL,           "text",
1.294     schwarze  337:        "Dd",           "Dt",           "Os",           "Sh",
                    338:        "Ss",           "Pp",           "D1",           "Dl",
                    339:        "Bd",           "Ed",           "Bl",           "El",
                    340:        "It",           "Ad",           "An",           "Ap",
                    341:        "Ar",           "Cd",           "Cm",           "Dv",
                    342:        "Er",           "Ev",           "Ex",           "Fa",
                    343:        "Fd",           "Fl",           "Fn",           "Ft",
                    344:        "Ic",           "In",           "Li",           "Nd",
                    345:        "Nm",           "Op",           "Ot",           "Pa",
                    346:        "Rv",           "St",           "Va",           "Vt",
                    347:        "Xr",           "%A",           "%B",           "%D",
                    348:        "%I",           "%J",           "%N",           "%O",
                    349:        "%P",           "%R",           "%T",           "%V",
                    350:        "Ac",           "Ao",           "Aq",           "At",
                    351:        "Bc",           "Bf",           "Bo",           "Bq",
                    352:        "Bsx",          "Bx",           "Db",           "Dc",
                    353:        "Do",           "Dq",           "Ec",           "Ef",
                    354:        "Em",           "Eo",           "Fx",           "Ms",
                    355:        "No",           "Ns",           "Nx",           "Ox",
                    356:        "Pc",           "Pf",           "Po",           "Pq",
                    357:        "Qc",           "Ql",           "Qo",           "Qq",
                    358:        "Re",           "Rs",           "Sc",           "So",
                    359:        "Sq",           "Sm",           "Sx",           "Sy",
                    360:        "Tn",           "Ux",           "Xc",           "Xo",
                    361:        "Fo",           "Fc",           "Oo",           "Oc",
                    362:        "Bk",           "Ek",           "Bt",           "Hf",
                    363:        "Fr",           "Ud",           "Lb",           "Lp",
                    364:        "Lk",           "Mt",           "Brq",          "Bro",
                    365:        "Brc",          "%C",           "Es",           "En",
1.299     schwarze  366:        "Dx",           "%Q",           "%U",           "Ta",
1.369     schwarze  367:        "Tg",           NULL,
1.294     schwarze  368:        "TH",           "SH",           "SS",           "TP",
1.332     schwarze  369:        "TQ",
1.294     schwarze  370:        "LP",           "PP",           "P",            "IP",
                    371:        "HP",           "SM",           "SB",           "BI",
                    372:        "IB",           "BR",           "RB",           "R",
                    373:        "B",            "I",            "IR",           "RI",
                    374:        "RE",           "RS",           "DT",           "UC",
1.297     schwarze  375:        "PD",           "AT",           "in",
1.333     schwarze  376:        "SY",           "YS",           "OP",
                    377:        "EX",           "EE",           "UR",
1.317     schwarze  378:        "UE",           "MT",           "ME",           NULL
1.294     schwarze  379: };
                    380: const  char *const *roff_name = __roff_name;
                    381:
                    382: static struct roffmac   roffs[TOKEN_NONE] = {
1.358     schwarze  383:        { roff_noarg, NULL, NULL, 0 },  /* br */
1.305     schwarze  384:        { roff_onearg, NULL, NULL, 0 },  /* ce */
1.358     schwarze  385:        { roff_noarg, NULL, NULL, 0 },  /* fi */
1.297     schwarze  386:        { roff_onearg, NULL, NULL, 0 },  /* ft */
1.298     schwarze  387:        { roff_onearg, NULL, NULL, 0 },  /* ll */
1.384     schwarze  388:        { roff_mc, NULL, NULL, 0 },  /* mc */
1.358     schwarze  389:        { roff_noarg, NULL, NULL, 0 },  /* nf */
1.312     schwarze  390:        { roff_onearg, NULL, NULL, 0 },  /* po */
1.309     schwarze  391:        { roff_onearg, NULL, NULL, 0 },  /* rj */
1.299     schwarze  392:        { roff_onearg, NULL, NULL, 0 },  /* sp */
1.300     schwarze  393:        { roff_manyarg, NULL, NULL, 0 },  /* ta */
1.301     schwarze  394:        { roff_onearg, NULL, NULL, 0 },  /* ti */
1.296     schwarze  395:        { NULL, NULL, NULL, 0 },  /* ROFF_MAX */
1.295     schwarze  396:        { roff_unsupp, NULL, NULL, 0 },  /* ab */
                    397:        { roff_line_ignore, NULL, NULL, 0 },  /* ad */
                    398:        { roff_line_ignore, NULL, NULL, 0 },  /* af */
                    399:        { roff_unsupp, NULL, NULL, 0 },  /* aln */
1.311     schwarze  400:        { roff_als, NULL, NULL, 0 },  /* als */
1.295     schwarze  401:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* am */
                    402:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* am1 */
                    403:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* ami */
                    404:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* ami1 */
                    405:        { roff_ds, NULL, NULL, 0 },  /* as */
                    406:        { roff_ds, NULL, NULL, 0 },  /* as1 */
                    407:        { roff_unsupp, NULL, NULL, 0 },  /* asciify */
                    408:        { roff_line_ignore, NULL, NULL, 0 },  /* backtrace */
                    409:        { roff_line_ignore, NULL, NULL, 0 },  /* bd */
                    410:        { roff_line_ignore, NULL, NULL, 0 },  /* bleedat */
                    411:        { roff_unsupp, NULL, NULL, 0 },  /* blm */
                    412:        { roff_unsupp, NULL, NULL, 0 },  /* box */
                    413:        { roff_unsupp, NULL, NULL, 0 },  /* boxa */
                    414:        { roff_line_ignore, NULL, NULL, 0 },  /* bp */
                    415:        { roff_unsupp, NULL, NULL, 0 },  /* BP */
1.364     schwarze  416:        { roff_break, NULL, NULL, 0 },  /* break */
1.295     schwarze  417:        { roff_line_ignore, NULL, NULL, 0 },  /* breakchar */
                    418:        { roff_line_ignore, NULL, NULL, 0 },  /* brnl */
1.358     schwarze  419:        { roff_noarg, NULL, NULL, 0 },  /* brp */
1.295     schwarze  420:        { roff_line_ignore, NULL, NULL, 0 },  /* brpnl */
                    421:        { roff_unsupp, NULL, NULL, 0 },  /* c2 */
                    422:        { roff_cc, NULL, NULL, 0 },  /* cc */
                    423:        { roff_insec, NULL, NULL, 0 },  /* cf */
                    424:        { roff_line_ignore, NULL, NULL, 0 },  /* cflags */
                    425:        { roff_line_ignore, NULL, NULL, 0 },  /* ch */
1.341     schwarze  426:        { roff_char, NULL, NULL, 0 },  /* char */
1.295     schwarze  427:        { roff_unsupp, NULL, NULL, 0 },  /* chop */
                    428:        { roff_line_ignore, NULL, NULL, 0 },  /* class */
                    429:        { roff_insec, NULL, NULL, 0 },  /* close */
                    430:        { roff_unsupp, NULL, NULL, 0 },  /* CL */
                    431:        { roff_line_ignore, NULL, NULL, 0 },  /* color */
                    432:        { roff_unsupp, NULL, NULL, 0 },  /* composite */
                    433:        { roff_unsupp, NULL, NULL, 0 },  /* continue */
                    434:        { roff_line_ignore, NULL, NULL, 0 },  /* cp */
                    435:        { roff_line_ignore, NULL, NULL, 0 },  /* cropat */
                    436:        { roff_line_ignore, NULL, NULL, 0 },  /* cs */
                    437:        { roff_line_ignore, NULL, NULL, 0 },  /* cu */
                    438:        { roff_unsupp, NULL, NULL, 0 },  /* da */
                    439:        { roff_unsupp, NULL, NULL, 0 },  /* dch */
                    440:        { roff_Dd, NULL, NULL, 0 },  /* Dd */
                    441:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* de */
                    442:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* de1 */
                    443:        { roff_line_ignore, NULL, NULL, 0 },  /* defcolor */
                    444:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* dei */
                    445:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* dei1 */
                    446:        { roff_unsupp, NULL, NULL, 0 },  /* device */
                    447:        { roff_unsupp, NULL, NULL, 0 },  /* devicem */
                    448:        { roff_unsupp, NULL, NULL, 0 },  /* di */
                    449:        { roff_unsupp, NULL, NULL, 0 },  /* do */
                    450:        { roff_ds, NULL, NULL, 0 },  /* ds */
                    451:        { roff_ds, NULL, NULL, 0 },  /* ds1 */
                    452:        { roff_unsupp, NULL, NULL, 0 },  /* dwh */
                    453:        { roff_unsupp, NULL, NULL, 0 },  /* dt */
1.303     schwarze  454:        { roff_ec, NULL, NULL, 0 },  /* ec */
1.295     schwarze  455:        { roff_unsupp, NULL, NULL, 0 },  /* ecr */
                    456:        { roff_unsupp, NULL, NULL, 0 },  /* ecs */
                    457:        { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT },  /* el */
                    458:        { roff_unsupp, NULL, NULL, 0 },  /* em */
                    459:        { roff_EN, NULL, NULL, 0 },  /* EN */
1.303     schwarze  460:        { roff_eo, NULL, NULL, 0 },  /* eo */
1.295     schwarze  461:        { roff_unsupp, NULL, NULL, 0 },  /* EP */
                    462:        { roff_EQ, NULL, NULL, 0 },  /* EQ */
                    463:        { roff_line_ignore, NULL, NULL, 0 },  /* errprint */
                    464:        { roff_unsupp, NULL, NULL, 0 },  /* ev */
                    465:        { roff_unsupp, NULL, NULL, 0 },  /* evc */
                    466:        { roff_unsupp, NULL, NULL, 0 },  /* ex */
                    467:        { roff_line_ignore, NULL, NULL, 0 },  /* fallback */
                    468:        { roff_line_ignore, NULL, NULL, 0 },  /* fam */
                    469:        { roff_unsupp, NULL, NULL, 0 },  /* fc */
                    470:        { roff_unsupp, NULL, NULL, 0 },  /* fchar */
                    471:        { roff_line_ignore, NULL, NULL, 0 },  /* fcolor */
                    472:        { roff_line_ignore, NULL, NULL, 0 },  /* fdeferlig */
                    473:        { roff_line_ignore, NULL, NULL, 0 },  /* feature */
                    474:        { roff_line_ignore, NULL, NULL, 0 },  /* fkern */
                    475:        { roff_line_ignore, NULL, NULL, 0 },  /* fl */
                    476:        { roff_line_ignore, NULL, NULL, 0 },  /* flig */
                    477:        { roff_line_ignore, NULL, NULL, 0 },  /* fp */
                    478:        { roff_line_ignore, NULL, NULL, 0 },  /* fps */
                    479:        { roff_unsupp, NULL, NULL, 0 },  /* fschar */
                    480:        { roff_line_ignore, NULL, NULL, 0 },  /* fspacewidth */
                    481:        { roff_line_ignore, NULL, NULL, 0 },  /* fspecial */
                    482:        { roff_line_ignore, NULL, NULL, 0 },  /* ftr */
                    483:        { roff_line_ignore, NULL, NULL, 0 },  /* fzoom */
                    484:        { roff_line_ignore, NULL, NULL, 0 },  /* gcolor */
                    485:        { roff_line_ignore, NULL, NULL, 0 },  /* hc */
                    486:        { roff_line_ignore, NULL, NULL, 0 },  /* hcode */
                    487:        { roff_line_ignore, NULL, NULL, 0 },  /* hidechar */
                    488:        { roff_line_ignore, NULL, NULL, 0 },  /* hla */
                    489:        { roff_line_ignore, NULL, NULL, 0 },  /* hlm */
                    490:        { roff_line_ignore, NULL, NULL, 0 },  /* hpf */
                    491:        { roff_line_ignore, NULL, NULL, 0 },  /* hpfa */
                    492:        { roff_line_ignore, NULL, NULL, 0 },  /* hpfcode */
                    493:        { roff_line_ignore, NULL, NULL, 0 },  /* hw */
                    494:        { roff_line_ignore, NULL, NULL, 0 },  /* hy */
                    495:        { roff_line_ignore, NULL, NULL, 0 },  /* hylang */
                    496:        { roff_line_ignore, NULL, NULL, 0 },  /* hylen */
                    497:        { roff_line_ignore, NULL, NULL, 0 },  /* hym */
                    498:        { roff_line_ignore, NULL, NULL, 0 },  /* hypp */
                    499:        { roff_line_ignore, NULL, NULL, 0 },  /* hys */
                    500:        { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT },  /* ie */
                    501:        { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT },  /* if */
                    502:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* ig */
                    503:        { roff_unsupp, NULL, NULL, 0 },  /* index */
                    504:        { roff_it, NULL, NULL, 0 },  /* it */
                    505:        { roff_unsupp, NULL, NULL, 0 },  /* itc */
                    506:        { roff_line_ignore, NULL, NULL, 0 },  /* IX */
                    507:        { roff_line_ignore, NULL, NULL, 0 },  /* kern */
                    508:        { roff_line_ignore, NULL, NULL, 0 },  /* kernafter */
                    509:        { roff_line_ignore, NULL, NULL, 0 },  /* kernbefore */
                    510:        { roff_line_ignore, NULL, NULL, 0 },  /* kernpair */
                    511:        { roff_unsupp, NULL, NULL, 0 },  /* lc */
                    512:        { roff_unsupp, NULL, NULL, 0 },  /* lc_ctype */
                    513:        { roff_unsupp, NULL, NULL, 0 },  /* lds */
                    514:        { roff_unsupp, NULL, NULL, 0 },  /* length */
                    515:        { roff_line_ignore, NULL, NULL, 0 },  /* letadj */
                    516:        { roff_insec, NULL, NULL, 0 },  /* lf */
                    517:        { roff_line_ignore, NULL, NULL, 0 },  /* lg */
                    518:        { roff_line_ignore, NULL, NULL, 0 },  /* lhang */
                    519:        { roff_unsupp, NULL, NULL, 0 },  /* linetabs */
                    520:        { roff_unsupp, NULL, NULL, 0 },  /* lnr */
                    521:        { roff_unsupp, NULL, NULL, 0 },  /* lnrf */
                    522:        { roff_unsupp, NULL, NULL, 0 },  /* lpfx */
                    523:        { roff_line_ignore, NULL, NULL, 0 },  /* ls */
                    524:        { roff_unsupp, NULL, NULL, 0 },  /* lsm */
                    525:        { roff_line_ignore, NULL, NULL, 0 },  /* lt */
                    526:        { roff_line_ignore, NULL, NULL, 0 },  /* mediasize */
                    527:        { roff_line_ignore, NULL, NULL, 0 },  /* minss */
                    528:        { roff_line_ignore, NULL, NULL, 0 },  /* mk */
                    529:        { roff_insec, NULL, NULL, 0 },  /* mso */
                    530:        { roff_line_ignore, NULL, NULL, 0 },  /* na */
                    531:        { roff_line_ignore, NULL, NULL, 0 },  /* ne */
                    532:        { roff_line_ignore, NULL, NULL, 0 },  /* nh */
                    533:        { roff_line_ignore, NULL, NULL, 0 },  /* nhychar */
                    534:        { roff_unsupp, NULL, NULL, 0 },  /* nm */
                    535:        { roff_unsupp, NULL, NULL, 0 },  /* nn */
1.330     schwarze  536:        { roff_nop, NULL, NULL, 0 },  /* nop */
1.295     schwarze  537:        { roff_nr, NULL, NULL, 0 },  /* nr */
                    538:        { roff_unsupp, NULL, NULL, 0 },  /* nrf */
                    539:        { roff_line_ignore, NULL, NULL, 0 },  /* nroff */
                    540:        { roff_line_ignore, NULL, NULL, 0 },  /* ns */
                    541:        { roff_insec, NULL, NULL, 0 },  /* nx */
                    542:        { roff_insec, NULL, NULL, 0 },  /* open */
                    543:        { roff_insec, NULL, NULL, 0 },  /* opena */
                    544:        { roff_line_ignore, NULL, NULL, 0 },  /* os */
                    545:        { roff_unsupp, NULL, NULL, 0 },  /* output */
                    546:        { roff_line_ignore, NULL, NULL, 0 },  /* padj */
                    547:        { roff_line_ignore, NULL, NULL, 0 },  /* papersize */
                    548:        { roff_line_ignore, NULL, NULL, 0 },  /* pc */
                    549:        { roff_line_ignore, NULL, NULL, 0 },  /* pev */
                    550:        { roff_insec, NULL, NULL, 0 },  /* pi */
                    551:        { roff_unsupp, NULL, NULL, 0 },  /* PI */
                    552:        { roff_line_ignore, NULL, NULL, 0 },  /* pl */
                    553:        { roff_line_ignore, NULL, NULL, 0 },  /* pm */
                    554:        { roff_line_ignore, NULL, NULL, 0 },  /* pn */
                    555:        { roff_line_ignore, NULL, NULL, 0 },  /* pnr */
                    556:        { roff_line_ignore, NULL, NULL, 0 },  /* ps */
                    557:        { roff_unsupp, NULL, NULL, 0 },  /* psbb */
                    558:        { roff_unsupp, NULL, NULL, 0 },  /* pshape */
                    559:        { roff_insec, NULL, NULL, 0 },  /* pso */
                    560:        { roff_line_ignore, NULL, NULL, 0 },  /* ptr */
                    561:        { roff_line_ignore, NULL, NULL, 0 },  /* pvs */
                    562:        { roff_unsupp, NULL, NULL, 0 },  /* rchar */
                    563:        { roff_line_ignore, NULL, NULL, 0 },  /* rd */
                    564:        { roff_line_ignore, NULL, NULL, 0 },  /* recursionlimit */
1.339     schwarze  565:        { roff_return, NULL, NULL, 0 },  /* return */
1.295     schwarze  566:        { roff_unsupp, NULL, NULL, 0 },  /* rfschar */
                    567:        { roff_line_ignore, NULL, NULL, 0 },  /* rhang */
                    568:        { roff_rm, NULL, NULL, 0 },  /* rm */
1.306     schwarze  569:        { roff_rn, NULL, NULL, 0 },  /* rn */
1.295     schwarze  570:        { roff_unsupp, NULL, NULL, 0 },  /* rnn */
                    571:        { roff_rr, NULL, NULL, 0 },  /* rr */
                    572:        { roff_line_ignore, NULL, NULL, 0 },  /* rs */
                    573:        { roff_line_ignore, NULL, NULL, 0 },  /* rt */
                    574:        { roff_unsupp, NULL, NULL, 0 },  /* schar */
                    575:        { roff_line_ignore, NULL, NULL, 0 },  /* sentchar */
                    576:        { roff_line_ignore, NULL, NULL, 0 },  /* shc */
1.339     schwarze  577:        { roff_shift, NULL, NULL, 0 },  /* shift */
1.295     schwarze  578:        { roff_line_ignore, NULL, NULL, 0 },  /* sizes */
                    579:        { roff_so, NULL, NULL, 0 },  /* so */
                    580:        { roff_line_ignore, NULL, NULL, 0 },  /* spacewidth */
                    581:        { roff_line_ignore, NULL, NULL, 0 },  /* special */
                    582:        { roff_line_ignore, NULL, NULL, 0 },  /* spreadwarn */
                    583:        { roff_line_ignore, NULL, NULL, 0 },  /* ss */
                    584:        { roff_line_ignore, NULL, NULL, 0 },  /* sty */
                    585:        { roff_unsupp, NULL, NULL, 0 },  /* substring */
                    586:        { roff_line_ignore, NULL, NULL, 0 },  /* sv */
                    587:        { roff_insec, NULL, NULL, 0 },  /* sy */
                    588:        { roff_T_, NULL, NULL, 0 },  /* T& */
                    589:        { roff_unsupp, NULL, NULL, 0 },  /* tc */
                    590:        { roff_TE, NULL, NULL, 0 },  /* TE */
1.315     schwarze  591:        { roff_Dd, NULL, NULL, 0 },  /* TH */
1.295     schwarze  592:        { roff_line_ignore, NULL, NULL, 0 },  /* tkf */
                    593:        { roff_unsupp, NULL, NULL, 0 },  /* tl */
                    594:        { roff_line_ignore, NULL, NULL, 0 },  /* tm */
                    595:        { roff_line_ignore, NULL, NULL, 0 },  /* tm1 */
                    596:        { roff_line_ignore, NULL, NULL, 0 },  /* tmc */
                    597:        { roff_tr, NULL, NULL, 0 },  /* tr */
                    598:        { roff_line_ignore, NULL, NULL, 0 },  /* track */
                    599:        { roff_line_ignore, NULL, NULL, 0 },  /* transchar */
                    600:        { roff_insec, NULL, NULL, 0 },  /* trf */
                    601:        { roff_line_ignore, NULL, NULL, 0 },  /* trimat */
                    602:        { roff_unsupp, NULL, NULL, 0 },  /* trin */
                    603:        { roff_unsupp, NULL, NULL, 0 },  /* trnt */
                    604:        { roff_line_ignore, NULL, NULL, 0 },  /* troff */
                    605:        { roff_TS, NULL, NULL, 0 },  /* TS */
                    606:        { roff_line_ignore, NULL, NULL, 0 },  /* uf */
                    607:        { roff_line_ignore, NULL, NULL, 0 },  /* ul */
                    608:        { roff_unsupp, NULL, NULL, 0 },  /* unformat */
                    609:        { roff_line_ignore, NULL, NULL, 0 },  /* unwatch */
                    610:        { roff_line_ignore, NULL, NULL, 0 },  /* unwatchn */
                    611:        { roff_line_ignore, NULL, NULL, 0 },  /* vpt */
                    612:        { roff_line_ignore, NULL, NULL, 0 },  /* vs */
                    613:        { roff_line_ignore, NULL, NULL, 0 },  /* warn */
                    614:        { roff_line_ignore, NULL, NULL, 0 },  /* warnscale */
                    615:        { roff_line_ignore, NULL, NULL, 0 },  /* watch */
                    616:        { roff_line_ignore, NULL, NULL, 0 },  /* watchlength */
                    617:        { roff_line_ignore, NULL, NULL, 0 },  /* watchn */
                    618:        { roff_unsupp, NULL, NULL, 0 },  /* wh */
1.340     schwarze  619:        { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT }, /*while*/
1.295     schwarze  620:        { roff_insec, NULL, NULL, 0 },  /* write */
                    621:        { roff_insec, NULL, NULL, 0 },  /* writec */
                    622:        { roff_insec, NULL, NULL, 0 },  /* writem */
                    623:        { roff_line_ignore, NULL, NULL, 0 },  /* xflag */
                    624:        { roff_cblock, NULL, NULL, 0 },  /* . */
1.306     schwarze  625:        { roff_renamed, NULL, NULL, 0 },
1.295     schwarze  626:        { roff_userdef, NULL, NULL, 0 }
1.67      kristaps  627: };
                    628:
1.141     kristaps  629: /* Array of injected predefined strings. */
                    630: #define        PREDEFS_MAX      38
                    631: static const struct predef predefs[PREDEFS_MAX] = {
                    632: #include "predefs.in"
                    633: };
                    634:
1.305     schwarze  635: static int      roffce_lines;  /* number of input lines to center */
                    636: static struct roff_node *roffce_node;  /* active request */
1.178     schwarze  637: static int      roffit_lines;  /* number of lines to delay */
                    638: static char    *roffit_macro;  /* nil-terminated macro line */
                    639:
1.207     schwarze  640:
1.266     schwarze  641: /* --- request table ------------------------------------------------------ */
                    642:
1.295     schwarze  643: struct ohash *
                    644: roffhash_alloc(enum roff_tok mintok, enum roff_tok maxtok)
1.85      kristaps  645: {
1.295     schwarze  646:        struct ohash    *htab;
                    647:        struct roffreq  *req;
                    648:        enum roff_tok    tok;
                    649:        size_t           sz;
                    650:        unsigned int     slot;
1.85      kristaps  651:
1.295     schwarze  652:        htab = mandoc_malloc(sizeof(*htab));
                    653:        mandoc_ohash_init(htab, 8, offsetof(struct roffreq, name));
1.85      kristaps  654:
1.295     schwarze  655:        for (tok = mintok; tok < maxtok; tok++) {
1.296     schwarze  656:                if (roff_name[tok] == NULL)
                    657:                        continue;
1.295     schwarze  658:                sz = strlen(roff_name[tok]);
                    659:                req = mandoc_malloc(sizeof(*req) + sz + 1);
                    660:                req->tok = tok;
                    661:                memcpy(req->name, roff_name[tok], sz + 1);
                    662:                slot = ohash_qlookup(htab, req->name);
                    663:                ohash_insert(htab, slot, req);
1.85      kristaps  664:        }
1.295     schwarze  665:        return htab;
1.85      kristaps  666: }
                    667:
1.295     schwarze  668: void
                    669: roffhash_free(struct ohash *htab)
1.67      kristaps  670: {
1.295     schwarze  671:        struct roffreq  *req;
                    672:        unsigned int     slot;
1.67      kristaps  673:
1.295     schwarze  674:        if (htab == NULL)
                    675:                return;
                    676:        for (req = ohash_first(htab, &slot); req != NULL;
                    677:             req = ohash_next(htab, &slot))
                    678:                free(req);
                    679:        ohash_delete(htab);
                    680:        free(htab);
                    681: }
                    682:
                    683: enum roff_tok
                    684: roffhash_find(struct ohash *htab, const char *name, size_t sz)
                    685: {
                    686:        struct roffreq  *req;
                    687:        const char      *end;
                    688:
                    689:        if (sz) {
                    690:                end = name + sz;
                    691:                req = ohash_find(htab, ohash_qlookupi(htab, name, &end));
                    692:        } else
                    693:                req = ohash_find(htab, ohash_qlookup(htab, name));
                    694:        return req == NULL ? TOKEN_NONE : req->tok;
1.67      kristaps  695: }
                    696:
1.266     schwarze  697: /* --- stack of request blocks -------------------------------------------- */
                    698:
1.67      kristaps  699: /*
                    700:  * Pop the current node off of the stack of roff instructions currently
1.364     schwarze  701:  * pending.  Return 1 if it is a loop or 0 otherwise.
1.67      kristaps  702:  */
1.340     schwarze  703: static int
1.67      kristaps  704: roffnode_pop(struct roff *r)
                    705: {
                    706:        struct roffnode *p;
1.340     schwarze  707:        int              inloop;
1.67      kristaps  708:
1.207     schwarze  709:        p = r->last;
1.340     schwarze  710:        inloop = p->tok == ROFF_while;
                    711:        r->last = p->parent;
1.106     kristaps  712:        free(p->name);
                    713:        free(p->end);
1.67      kristaps  714:        free(p);
1.340     schwarze  715:        return inloop;
1.67      kristaps  716: }
                    717:
                    718: /*
                    719:  * Push a roff node onto the instruction stack.  This must later be
                    720:  * removed with roffnode_pop().
                    721:  */
1.98      schwarze  722: static void
1.294     schwarze  723: roffnode_push(struct roff *r, enum roff_tok tok, const char *name,
1.106     kristaps  724:                int line, int col)
1.67      kristaps  725: {
                    726:        struct roffnode *p;
                    727:
1.98      schwarze  728:        p = mandoc_calloc(1, sizeof(struct roffnode));
1.67      kristaps  729:        p->tok = tok;
1.106     kristaps  730:        if (name)
                    731:                p->name = mandoc_strdup(name);
1.67      kristaps  732:        p->parent = r->last;
                    733:        p->line = line;
                    734:        p->col = col;
1.198     schwarze  735:        p->rule = p->parent ? p->parent->rule : 0;
1.67      kristaps  736:
                    737:        r->last = p;
                    738: }
                    739:
1.266     schwarze  740: /* --- roff parser state data management ---------------------------------- */
                    741:
1.67      kristaps  742: static void
                    743: roff_free1(struct roff *r)
                    744: {
1.167     kristaps  745:        int              i;
1.67      kristaps  746:
1.346     schwarze  747:        tbl_free(r->first_tbl);
1.113     kristaps  748:        r->first_tbl = r->last_tbl = r->tbl = NULL;
                    749:
1.347     schwarze  750:        eqn_free(r->last_eqn);
1.319     schwarze  751:        r->last_eqn = r->eqn = NULL;
1.125     kristaps  752:
1.339     schwarze  753:        while (r->mstackpos >= 0)
                    754:                roff_userret(r);
                    755:
1.67      kristaps  756:        while (r->last)
                    757:                roffnode_pop(r);
1.109     kristaps  758:
1.223     schwarze  759:        free (r->rstack);
                    760:        r->rstack = NULL;
                    761:        r->rstacksz = 0;
                    762:        r->rstackpos = -1;
                    763:
                    764:        roff_freereg(r->regtab);
                    765:        r->regtab = NULL;
                    766:
1.167     kristaps  767:        roff_freestr(r->strtab);
1.306     schwarze  768:        roff_freestr(r->rentab);
1.167     kristaps  769:        roff_freestr(r->xmbtab);
1.306     schwarze  770:        r->strtab = r->rentab = r->xmbtab = NULL;
1.167     kristaps  771:
                    772:        if (r->xtab)
                    773:                for (i = 0; i < 128; i++)
                    774:                        free(r->xtab[i].p);
                    775:        free(r->xtab);
                    776:        r->xtab = NULL;
1.67      kristaps  777: }
                    778:
                    779: void
                    780: roff_reset(struct roff *r)
                    781: {
                    782:        roff_free1(r);
1.367     schwarze  783:        r->options |= MPARSE_COMMENT;
1.227     schwarze  784:        r->format = r->options & (MPARSE_MDOC | MPARSE_MAN);
1.303     schwarze  785:        r->control = '\0';
                    786:        r->escape = '\\';
1.307     schwarze  787:        roffce_lines = 0;
                    788:        roffce_node = NULL;
                    789:        roffit_lines = 0;
                    790:        roffit_macro = NULL;
1.67      kristaps  791: }
                    792:
                    793: void
                    794: roff_free(struct roff *r)
                    795: {
1.366     schwarze  796:        int              i;
1.339     schwarze  797:
1.67      kristaps  798:        roff_free1(r);
1.339     schwarze  799:        for (i = 0; i < r->mstacksz; i++)
                    800:                free(r->mstack[i].argv);
                    801:        free(r->mstack);
1.295     schwarze  802:        roffhash_free(r->reqtab);
1.67      kristaps  803:        free(r);
                    804: }
                    805:
                    806: struct roff *
1.351     schwarze  807: roff_alloc(int options)
1.67      kristaps  808: {
                    809:        struct roff     *r;
                    810:
1.98      schwarze  811:        r = mandoc_calloc(1, sizeof(struct roff));
1.328     schwarze  812:        r->reqtab = roffhash_alloc(0, ROFF_RENAMED);
1.367     schwarze  813:        r->options = options | MPARSE_COMMENT;
1.227     schwarze  814:        r->format = options & (MPARSE_MDOC | MPARSE_MAN);
1.339     schwarze  815:        r->mstackpos = -1;
1.82      kristaps  816:        r->rstackpos = -1;
1.303     schwarze  817:        r->escape = '\\';
1.277     schwarze  818:        return r;
1.265     schwarze  819: }
                    820:
1.266     schwarze  821: /* --- syntax tree state data management ---------------------------------- */
                    822:
1.265     schwarze  823: static void
                    824: roff_man_free1(struct roff_man *man)
                    825: {
1.356     schwarze  826:        if (man->meta.first != NULL)
                    827:                roff_node_delete(man, man->meta.first);
1.265     schwarze  828:        free(man->meta.msec);
                    829:        free(man->meta.vol);
                    830:        free(man->meta.os);
                    831:        free(man->meta.arch);
                    832:        free(man->meta.title);
                    833:        free(man->meta.name);
                    834:        free(man->meta.date);
1.356     schwarze  835:        free(man->meta.sodest);
1.265     schwarze  836: }
                    837:
1.357     schwarze  838: void
                    839: roff_state_reset(struct roff_man *man)
                    840: {
                    841:        man->last = man->meta.first;
                    842:        man->last_es = NULL;
                    843:        man->flags = 0;
                    844:        man->lastsec = man->lastnamed = SEC_NONE;
                    845:        man->next = ROFF_NEXT_CHILD;
                    846:        roff_setreg(man->roff, "nS", 0, '=');
                    847: }
                    848:
1.265     schwarze  849: static void
                    850: roff_man_alloc1(struct roff_man *man)
                    851: {
                    852:        memset(&man->meta, 0, sizeof(man->meta));
1.356     schwarze  853:        man->meta.first = mandoc_calloc(1, sizeof(*man->meta.first));
                    854:        man->meta.first->type = ROFFT_ROOT;
                    855:        man->meta.macroset = MACROSET_NONE;
1.357     schwarze  856:        roff_state_reset(man);
1.265     schwarze  857: }
                    858:
                    859: void
                    860: roff_man_reset(struct roff_man *man)
                    861: {
                    862:        roff_man_free1(man);
                    863:        roff_man_alloc1(man);
                    864: }
                    865:
                    866: void
                    867: roff_man_free(struct roff_man *man)
                    868: {
                    869:        roff_man_free1(man);
1.380     schwarze  870:        free(man->os_r);
1.265     schwarze  871:        free(man);
                    872: }
                    873:
                    874: struct roff_man *
1.351     schwarze  875: roff_man_alloc(struct roff *roff, const char *os_s, int quick)
1.265     schwarze  876: {
                    877:        struct roff_man *man;
                    878:
                    879:        man = mandoc_calloc(1, sizeof(*man));
                    880:        man->roff = roff;
1.316     schwarze  881:        man->os_s = os_s;
1.265     schwarze  882:        man->quick = quick;
                    883:        roff_man_alloc1(man);
1.296     schwarze  884:        roff->man = man;
1.277     schwarze  885:        return man;
1.67      kristaps  886: }
                    887:
1.266     schwarze  888: /* --- syntax tree handling ----------------------------------------------- */
                    889:
                    890: struct roff_node *
                    891: roff_node_alloc(struct roff_man *man, int line, int pos,
                    892:        enum roff_type type, int tok)
                    893: {
                    894:        struct roff_node        *n;
                    895:
                    896:        n = mandoc_calloc(1, sizeof(*n));
                    897:        n->line = line;
                    898:        n->pos = pos;
                    899:        n->tok = tok;
                    900:        n->type = type;
                    901:        n->sec = man->lastsec;
                    902:
                    903:        if (man->flags & MDOC_SYNOPSIS)
1.285     schwarze  904:                n->flags |= NODE_SYNPRETTY;
1.266     schwarze  905:        else
1.285     schwarze  906:                n->flags &= ~NODE_SYNPRETTY;
1.360     schwarze  907:        if ((man->flags & (ROFF_NOFILL | ROFF_NONOFILL)) == ROFF_NOFILL)
1.359     schwarze  908:                n->flags |= NODE_NOFILL;
                    909:        else
                    910:                n->flags &= ~NODE_NOFILL;
1.266     schwarze  911:        if (man->flags & MDOC_NEWLINE)
1.285     schwarze  912:                n->flags |= NODE_LINE;
1.266     schwarze  913:        man->flags &= ~MDOC_NEWLINE;
                    914:
1.277     schwarze  915:        return n;
1.266     schwarze  916: }
                    917:
                    918: void
                    919: roff_node_append(struct roff_man *man, struct roff_node *n)
                    920: {
                    921:
                    922:        switch (man->next) {
                    923:        case ROFF_NEXT_SIBLING:
1.281     schwarze  924:                if (man->last->next != NULL) {
                    925:                        n->next = man->last->next;
                    926:                        man->last->next->prev = n;
                    927:                } else
                    928:                        man->last->parent->last = n;
1.266     schwarze  929:                man->last->next = n;
                    930:                n->prev = man->last;
                    931:                n->parent = man->last->parent;
                    932:                break;
                    933:        case ROFF_NEXT_CHILD:
1.287     schwarze  934:                if (man->last->child != NULL) {
                    935:                        n->next = man->last->child;
                    936:                        man->last->child->prev = n;
                    937:                } else
                    938:                        man->last->last = n;
1.266     schwarze  939:                man->last->child = n;
                    940:                n->parent = man->last;
                    941:                break;
                    942:        default:
                    943:                abort();
                    944:        }
1.282     schwarze  945:        man->last = n;
1.266     schwarze  946:
                    947:        switch (n->type) {
                    948:        case ROFFT_HEAD:
                    949:                n->parent->head = n;
                    950:                break;
                    951:        case ROFFT_BODY:
1.282     schwarze  952:                if (n->end != ENDBODY_NOT)
                    953:                        return;
1.266     schwarze  954:                n->parent->body = n;
                    955:                break;
                    956:        case ROFFT_TAIL:
                    957:                n->parent->tail = n;
                    958:                break;
                    959:        default:
1.282     schwarze  960:                return;
1.266     schwarze  961:        }
1.282     schwarze  962:
                    963:        /*
                    964:         * Copy over the normalised-data pointer of our parent.  Not
                    965:         * everybody has one, but copying a null pointer is fine.
                    966:         */
                    967:
                    968:        n->norm = n->parent->norm;
                    969:        assert(n->parent->type == ROFFT_BLOCK);
1.266     schwarze  970: }
                    971:
1.267     schwarze  972: void
                    973: roff_word_alloc(struct roff_man *man, int line, int pos, const char *word)
                    974: {
                    975:        struct roff_node        *n;
                    976:
                    977:        n = roff_node_alloc(man, line, pos, ROFFT_TEXT, TOKEN_NONE);
                    978:        n->string = roff_strdup(man->roff, word);
                    979:        roff_node_append(man, n);
1.286     schwarze  980:        n->flags |= NODE_VALID | NODE_ENDED;
1.267     schwarze  981:        man->next = ROFF_NEXT_SIBLING;
                    982: }
                    983:
                    984: void
                    985: roff_word_append(struct roff_man *man, const char *word)
                    986: {
                    987:        struct roff_node        *n;
                    988:        char                    *addstr, *newstr;
                    989:
                    990:        n = man->last;
                    991:        addstr = roff_strdup(man->roff, word);
                    992:        mandoc_asprintf(&newstr, "%s %s", n->string, addstr);
                    993:        free(addstr);
                    994:        free(n->string);
                    995:        n->string = newstr;
                    996:        man->next = ROFF_NEXT_SIBLING;
1.268     schwarze  997: }
                    998:
                    999: void
                   1000: roff_elem_alloc(struct roff_man *man, int line, int pos, int tok)
                   1001: {
                   1002:        struct roff_node        *n;
                   1003:
                   1004:        n = roff_node_alloc(man, line, pos, ROFFT_ELEM, tok);
                   1005:        roff_node_append(man, n);
                   1006:        man->next = ROFF_NEXT_CHILD;
                   1007: }
                   1008:
                   1009: struct roff_node *
                   1010: roff_block_alloc(struct roff_man *man, int line, int pos, int tok)
                   1011: {
                   1012:        struct roff_node        *n;
                   1013:
                   1014:        n = roff_node_alloc(man, line, pos, ROFFT_BLOCK, tok);
                   1015:        roff_node_append(man, n);
                   1016:        man->next = ROFF_NEXT_CHILD;
1.277     schwarze 1017:        return n;
1.267     schwarze 1018: }
                   1019:
1.266     schwarze 1020: struct roff_node *
                   1021: roff_head_alloc(struct roff_man *man, int line, int pos, int tok)
                   1022: {
                   1023:        struct roff_node        *n;
                   1024:
                   1025:        n = roff_node_alloc(man, line, pos, ROFFT_HEAD, tok);
                   1026:        roff_node_append(man, n);
                   1027:        man->next = ROFF_NEXT_CHILD;
1.277     schwarze 1028:        return n;
1.266     schwarze 1029: }
                   1030:
                   1031: struct roff_node *
                   1032: roff_body_alloc(struct roff_man *man, int line, int pos, int tok)
                   1033: {
                   1034:        struct roff_node        *n;
                   1035:
                   1036:        n = roff_node_alloc(man, line, pos, ROFFT_BODY, tok);
                   1037:        roff_node_append(man, n);
                   1038:        man->next = ROFF_NEXT_CHILD;
1.277     schwarze 1039:        return n;
1.267     schwarze 1040: }
                   1041:
1.321     schwarze 1042: static void
1.346     schwarze 1043: roff_addtbl(struct roff_man *man, int line, struct tbl_node *tbl)
1.267     schwarze 1044: {
                   1045:        struct roff_node        *n;
1.346     schwarze 1046:        struct tbl_span         *span;
1.267     schwarze 1047:
1.356     schwarze 1048:        if (man->meta.macroset == MACROSET_MAN)
1.302     schwarze 1049:                man_breakscope(man, ROFF_TS);
1.321     schwarze 1050:        while ((span = tbl_span(tbl)) != NULL) {
1.346     schwarze 1051:                n = roff_node_alloc(man, line, 0, ROFFT_TBL, TOKEN_NONE);
1.321     schwarze 1052:                n->span = span;
                   1053:                roff_node_append(man, n);
                   1054:                n->flags |= NODE_VALID | NODE_ENDED;
                   1055:                man->next = ROFF_NEXT_SIBLING;
                   1056:        }
1.266     schwarze 1057: }
                   1058:
                   1059: void
                   1060: roff_node_unlink(struct roff_man *man, struct roff_node *n)
                   1061: {
                   1062:
                   1063:        /* Adjust siblings. */
                   1064:
                   1065:        if (n->prev)
                   1066:                n->prev->next = n->next;
                   1067:        if (n->next)
                   1068:                n->next->prev = n->prev;
                   1069:
                   1070:        /* Adjust parent. */
                   1071:
                   1072:        if (n->parent != NULL) {
                   1073:                if (n->parent->child == n)
                   1074:                        n->parent->child = n->next;
                   1075:                if (n->parent->last == n)
                   1076:                        n->parent->last = n->prev;
                   1077:        }
                   1078:
                   1079:        /* Adjust parse point. */
                   1080:
                   1081:        if (man == NULL)
                   1082:                return;
                   1083:        if (man->last == n) {
                   1084:                if (n->prev == NULL) {
                   1085:                        man->last = n->parent;
                   1086:                        man->next = ROFF_NEXT_CHILD;
                   1087:                } else {
                   1088:                        man->last = n->prev;
                   1089:                        man->next = ROFF_NEXT_SIBLING;
                   1090:                }
                   1091:        }
1.356     schwarze 1092:        if (man->meta.first == n)
                   1093:                man->meta.first = NULL;
1.344     schwarze 1094: }
                   1095:
                   1096: void
                   1097: roff_node_relink(struct roff_man *man, struct roff_node *n)
                   1098: {
                   1099:        roff_node_unlink(man, n);
                   1100:        n->prev = n->next = NULL;
                   1101:        roff_node_append(man, n);
1.266     schwarze 1102: }
                   1103:
                   1104: void
                   1105: roff_node_free(struct roff_node *n)
                   1106: {
                   1107:
                   1108:        if (n->args != NULL)
                   1109:                mdoc_argv_free(n->args);
                   1110:        if (n->type == ROFFT_BLOCK || n->type == ROFFT_ELEM)
                   1111:                free(n->norm);
1.347     schwarze 1112:        eqn_box_free(n->eqn);
1.266     schwarze 1113:        free(n->string);
1.374     schwarze 1114:        free(n->tag);
1.266     schwarze 1115:        free(n);
                   1116: }
                   1117:
                   1118: void
                   1119: roff_node_delete(struct roff_man *man, struct roff_node *n)
                   1120: {
                   1121:
                   1122:        while (n->child != NULL)
                   1123:                roff_node_delete(man, n->child);
                   1124:        roff_node_unlink(man, n);
                   1125:        roff_node_free(n);
1.370     schwarze 1126: }
                   1127:
                   1128: int
                   1129: roff_node_transparent(struct roff_node *n)
                   1130: {
                   1131:        if (n == NULL)
                   1132:                return 0;
                   1133:        if (n->type == ROFFT_COMMENT || n->flags & NODE_NOPRT)
                   1134:                return 1;
1.373     schwarze 1135:        return roff_tok_transparent(n->tok);
                   1136: }
                   1137:
                   1138: int
                   1139: roff_tok_transparent(enum roff_tok tok)
                   1140: {
                   1141:        switch (tok) {
1.370     schwarze 1142:        case ROFF_ft:
                   1143:        case ROFF_ll:
                   1144:        case ROFF_mc:
                   1145:        case ROFF_po:
                   1146:        case ROFF_ta:
                   1147:        case MDOC_Db:
                   1148:        case MDOC_Es:
                   1149:        case MDOC_Sm:
                   1150:        case MDOC_Tg:
                   1151:        case MAN_DT:
                   1152:        case MAN_UC:
                   1153:        case MAN_PD:
                   1154:        case MAN_AT:
                   1155:                return 1;
                   1156:        default:
                   1157:                return 0;
                   1158:        }
                   1159: }
                   1160:
                   1161: struct roff_node *
                   1162: roff_node_child(struct roff_node *n)
                   1163: {
                   1164:        for (n = n->child; roff_node_transparent(n); n = n->next)
                   1165:                continue;
                   1166:        return n;
                   1167: }
                   1168:
                   1169: struct roff_node *
                   1170: roff_node_prev(struct roff_node *n)
                   1171: {
                   1172:        do {
                   1173:                n = n->prev;
                   1174:        } while (roff_node_transparent(n));
                   1175:        return n;
                   1176: }
                   1177:
                   1178: struct roff_node *
                   1179: roff_node_next(struct roff_node *n)
                   1180: {
                   1181:        do {
                   1182:                n = n->next;
                   1183:        } while (roff_node_transparent(n));
                   1184:        return n;
1.269     schwarze 1185: }
                   1186:
                   1187: void
                   1188: deroff(char **dest, const struct roff_node *n)
                   1189: {
                   1190:        char    *cp;
                   1191:        size_t   sz;
                   1192:
1.371     schwarze 1193:        if (n->string == NULL) {
1.269     schwarze 1194:                for (n = n->child; n != NULL; n = n->next)
                   1195:                        deroff(dest, n);
                   1196:                return;
                   1197:        }
                   1198:
1.288     schwarze 1199:        /* Skip leading whitespace. */
1.269     schwarze 1200:
1.288     schwarze 1201:        for (cp = n->string; *cp != '\0'; cp++) {
1.289     schwarze 1202:                if (cp[0] == '\\' && cp[1] != '\0' &&
                   1203:                    strchr(" %&0^|~", cp[1]) != NULL)
1.269     schwarze 1204:                        cp++;
1.288     schwarze 1205:                else if ( ! isspace((unsigned char)*cp))
1.269     schwarze 1206:                        break;
                   1207:        }
                   1208:
1.289     schwarze 1209:        /* Skip trailing backslash. */
                   1210:
                   1211:        sz = strlen(cp);
1.290     schwarze 1212:        if (sz > 0 && cp[sz - 1] == '\\')
1.289     schwarze 1213:                sz--;
                   1214:
1.269     schwarze 1215:        /* Skip trailing whitespace. */
                   1216:
1.289     schwarze 1217:        for (; sz; sz--)
1.269     schwarze 1218:                if ( ! isspace((unsigned char)cp[sz-1]))
                   1219:                        break;
                   1220:
                   1221:        /* Skip empty strings. */
                   1222:
                   1223:        if (sz == 0)
                   1224:                return;
                   1225:
                   1226:        if (*dest == NULL) {
                   1227:                *dest = mandoc_strndup(cp, sz);
                   1228:                return;
                   1229:        }
                   1230:
                   1231:        mandoc_asprintf(&cp, "%s %*s", *dest, (int)sz, cp);
                   1232:        free(*dest);
                   1233:        *dest = cp;
1.266     schwarze 1234: }
                   1235:
                   1236: /* --- main functions of the roff parser ---------------------------------- */
                   1237:
1.388     schwarze 1238: /*
                   1239:  * Save comments preceding the title macro, for example in order to
                   1240:  * preserve Copyright and license headers in HTML output,
                   1241:  * provide diagnostics about RCS ids and trailing whitespace in comments,
                   1242:  * then discard comments including preceding whitespace.
                   1243:  * This function also handles input line continuation.
                   1244:  */
1.387     schwarze 1245: static int
1.388     schwarze 1246: roff_parse_comment(struct roff *r, struct buf *buf, int ln, int pos, char ec)
1.387     schwarze 1247: {
                   1248:        struct roff_node *n;    /* used for header comments */
                   1249:        const char      *start; /* start of the string to process */
                   1250:        const char      *cp;    /* for RCS id parsing */
                   1251:        char            *stesc; /* start of an escape sequence ('\\') */
                   1252:        char            *ep;    /* end of comment string */
                   1253:        int              rcsid; /* kind of RCS id seen */
                   1254:
                   1255:        for (start = stesc = buf->buf + pos;; stesc++) {
1.388     schwarze 1256:                /*
                   1257:                 * XXX Ugly hack: Remove the newline character that
                   1258:                 * mparse_buf_r() appended to mark the end of input
                   1259:                 * if it is not preceded by an escape character.
                   1260:                 */
                   1261:                if (stesc[0] == '\n') {
                   1262:                        assert(stesc[1] == '\0');
                   1263:                        stesc[0] = '\0';
                   1264:                }
                   1265:
1.387     schwarze 1266:                /* The line ends without continuation or comment. */
                   1267:                if (stesc[0] == '\0')
                   1268:                        return ROFF_CONT;
                   1269:
                   1270:                /* Unescaped byte: skip it. */
1.388     schwarze 1271:                if (stesc[0] != ec)
1.387     schwarze 1272:                        continue;
                   1273:
1.388     schwarze 1274:                /*
                   1275:                 * XXX Ugly hack: Do not attempt to append another line
                   1276:                 * if the function mparse_buf_r() appended a newline
                   1277:                 * character to indicate the end of input.
                   1278:                 */
                   1279:                if (stesc[1] == '\n') {
                   1280:                        assert(stesc[2] == '\0');
                   1281:                        stesc[0] = '\0';
                   1282:                        return ROFF_CONT;
                   1283:                }
                   1284:
                   1285:                /*
                   1286:                 * An escape character at the end of an input line
                   1287:                 * requests line continuation.
                   1288:                 */
1.387     schwarze 1289:                if (stesc[1] == '\0') {
                   1290:                        stesc[0] = '\0';
                   1291:                        return ROFF_IGN | ROFF_APPEND;
                   1292:                }
                   1293:
                   1294:                /* Found a comment: process it. */
                   1295:                if (stesc[1] == '"' || stesc[1] == '#')
                   1296:                        break;
                   1297:
                   1298:                /* Escaped escape character: skip them both. */
1.388     schwarze 1299:                if (stesc[1] == ec)
1.387     schwarze 1300:                        stesc++;
                   1301:        }
                   1302:
                   1303:        /* Look for an RCS id in the comment. */
                   1304:
                   1305:        rcsid = 0;
                   1306:        if ((cp = strstr(stesc + 2, "$" "OpenBSD")) != NULL) {
                   1307:                rcsid = 1 << MANDOC_OS_OPENBSD;
                   1308:                cp += 8;
                   1309:        } else if ((cp = strstr(stesc + 2, "$" "NetBSD")) != NULL) {
                   1310:                rcsid = 1 << MANDOC_OS_NETBSD;
                   1311:                cp += 7;
                   1312:        }
                   1313:        if (cp != NULL && isalnum((unsigned char)*cp) == 0 &&
                   1314:            strchr(cp, '$') != NULL) {
                   1315:                if (r->man->meta.rcsids & rcsid)
                   1316:                        mandoc_msg(MANDOCERR_RCS_REP, ln,
                   1317:                            (int)(stesc - buf->buf) + 2, "%s", stesc + 1);
                   1318:                r->man->meta.rcsids |= rcsid;
                   1319:        }
                   1320:
                   1321:        /* Warn about trailing whitespace at the end of the comment. */
                   1322:
                   1323:        ep = strchr(stesc + 2, '\0') - 1;
                   1324:        if (*ep == '\n')
                   1325:                *ep-- = '\0';
                   1326:        if (*ep == ' ' || *ep == '\t')
                   1327:                mandoc_msg(MANDOCERR_SPACE_EOL,
                   1328:                    ln, (int)(ep - buf->buf), NULL);
                   1329:
                   1330:        /* Save comments preceding the title macro in the syntax tree. */
                   1331:
                   1332:        if (r->options & MPARSE_COMMENT) {
                   1333:                while (*ep == ' ' || *ep == '\t')
                   1334:                        ep--;
                   1335:                ep[1] = '\0';
                   1336:                n = roff_node_alloc(r->man, ln, stesc + 1 - buf->buf,
                   1337:                    ROFFT_COMMENT, TOKEN_NONE);
                   1338:                n->string = mandoc_strdup(stesc + 2);
                   1339:                roff_node_append(r->man, n);
                   1340:                n->flags |= NODE_VALID | NODE_ENDED;
                   1341:                r->man->next = ROFF_NEXT_SIBLING;
                   1342:        }
                   1343:
                   1344:        /* The comment requests line continuation. */
                   1345:
                   1346:        if (stesc[1] == '#') {
                   1347:                *stesc = '\0';
                   1348:                return ROFF_IGN | ROFF_APPEND;
                   1349:        }
                   1350:
                   1351:        /* Discard the comment including preceding whitespace. */
                   1352:
                   1353:        while (stesc > start && stesc[-1] == ' ' &&
                   1354:            (stesc == start + 1 || stesc[-2] != '\\'))
                   1355:                stesc--;
                   1356:        *stesc = '\0';
                   1357:        return ROFF_CONT;
                   1358: }
                   1359:
1.94      kristaps 1360: /*
1.355     schwarze 1361:  * In the current line, expand escape sequences that produce parsable
                   1362:  * input text.  Also check the syntax of the remaining escape sequences,
                   1363:  * which typically produce output glyphs or change formatter state.
1.154     kristaps 1364:  */
1.340     schwarze 1365: static int
1.388     schwarze 1366: roff_expand(struct roff *r, struct buf *buf, int ln, int pos, char ec)
1.94      kristaps 1367: {
1.388     schwarze 1368:        char             ubuf[24];      /* buffer to print a number */
                   1369:        struct mctx     *ctx;           /* current macro call context */
                   1370:        const char      *res;           /* the string to be pasted */
                   1371:        const char      *src;           /* source for copying */
                   1372:        char            *dst;           /* destination for copying */
                   1373:        int              iesc;          /* index of leading escape char */
                   1374:        int              inam;          /* index of the escape name */
                   1375:        int              iarg;          /* index beginning the argument */
                   1376:        int              iendarg;       /* index right after the argument */
                   1377:        int              iend;          /* index right after the sequence */
                   1378:        int              deftype;       /* type of definition to paste */
                   1379:        int              argi;          /* macro argument index */
                   1380:        int              quote_args;    /* true for \\$@, false for \\$* */
                   1381:        int              asz;           /* length of the replacement */
                   1382:        int              rsz;           /* length of the rest of the string */
                   1383:        int              npos;          /* position in numeric expression */
1.181     schwarze 1384:        int              expand_count;  /* to avoid infinite loops */
1.303     schwarze 1385:
1.170     schwarze 1386:        expand_count = 0;
1.388     schwarze 1387:        while (buf->buf[pos] != '\0') {
1.170     schwarze 1388:
1.388     schwarze 1389:                /*
                   1390:                 * Skip plain ASCII characters.
                   1391:                 * If we have a non-standard escape character,
                   1392:                 * escape literal backslashes because all processing in
                   1393:                 * subsequent functions uses the standard escaping rules.
                   1394:                 */
1.205     schwarze 1395:
1.388     schwarze 1396:                if (buf->buf[pos] != ec) {
                   1397:                        if (ec != ASCII_ESC && buf->buf[pos] == '\\') {
                   1398:                                roff_expand_patch(buf, pos, "\\e", pos + 1);
                   1399:                                pos++;
1.303     schwarze 1400:                        }
1.388     schwarze 1401:                        pos++;
1.205     schwarze 1402:                        continue;
1.303     schwarze 1403:                }
1.205     schwarze 1404:
1.388     schwarze 1405:                /*
                   1406:                 * Parse escape sequences,
                   1407:                 * issue diagnostic messages when appropriate,
                   1408:                 * and skip sequences that do not need expansion.
                   1409:                 * If we have a non-standard escape character, translate
                   1410:                 * it to backslashes and translate backslashes to \e.
                   1411:                 */
1.205     schwarze 1412:
1.388     schwarze 1413:                if (roff_escape(buf->buf, ln, pos,
                   1414:                    &iesc, &iarg, &iendarg, &iend) != ESCAPE_EXPAND) {
                   1415:                        while (pos < iend) {
                   1416:                                if (buf->buf[pos] == ec) {
                   1417:                                        buf->buf[pos] = '\\';
                   1418:                                        if (pos + 1 < iend)
                   1419:                                                pos++;
                   1420:                                } else if (buf->buf[pos] == '\\') {
                   1421:                                        roff_expand_patch(buf,
                   1422:                                            pos, "\\e", pos + 1);
                   1423:                                        pos++;
                   1424:                                        iend++;
                   1425:                                }
                   1426:                                pos++;
1.352     schwarze 1427:                        }
1.205     schwarze 1428:                        continue;
1.152     kristaps 1429:                }
                   1430:
1.108     schwarze 1431:                /*
1.388     schwarze 1432:                 * Treat "\E" just like "\";
                   1433:                 * it only makes a difference in copy mode.
1.108     schwarze 1434:                 */
                   1435:
1.388     schwarze 1436:                inam = iesc + 1;
                   1437:                while (buf->buf[inam] == 'E')
                   1438:                        inam++;
                   1439:
                   1440:                /* Handle expansion. */
                   1441:
                   1442:                res = NULL;
                   1443:                switch (buf->buf[inam]) {
                   1444:                case '*':
                   1445:                        if (iendarg == iarg)
1.206     schwarze 1446:                                break;
1.388     schwarze 1447:                        deftype = ROFFDEF_USER | ROFFDEF_PRE;
                   1448:                        if ((res = roff_getstrn(r, buf->buf + iarg,
                   1449:                            iendarg - iarg, &deftype)) != NULL)
1.206     schwarze 1450:                                break;
1.94      kristaps 1451:
1.388     schwarze 1452:                        /*
                   1453:                         * If not overriden,
                   1454:                         * let \*(.T through to the formatters.
                   1455:                         */
1.94      kristaps 1456:
1.388     schwarze 1457:                        if (iendarg - iarg == 2 &&
                   1458:                            buf->buf[iarg] == '.' &&
                   1459:                            buf->buf[iarg + 1] == 'T') {
                   1460:                                roff_setstrn(&r->strtab, ".T", 2, NULL, 0, 0);
                   1461:                                pos = iend;
1.253     schwarze 1462:                                continue;
                   1463:                        }
1.94      kristaps 1464:
1.388     schwarze 1465:                        mandoc_msg(MANDOCERR_STR_UNDEF, ln, iesc,
                   1466:                            "%.*s", iendarg - iarg, buf->buf + iarg);
                   1467:                        break;
1.108     schwarze 1468:
1.339     schwarze 1469:                case '$':
                   1470:                        if (r->mstackpos < 0) {
1.388     schwarze 1471:                                mandoc_msg(MANDOCERR_ARG_UNDEF, ln, iesc,
                   1472:                                    "%.*s", iend - iesc, buf->buf + iesc);
1.339     schwarze 1473:                                break;
                   1474:                        }
                   1475:                        ctx = r->mstack + r->mstackpos;
1.388     schwarze 1476:                        argi = buf->buf[iarg] - '1';
                   1477:                        if (argi >= 0 && argi <= 8) {
                   1478:                                if (argi < ctx->argc)
                   1479:                                        res = ctx->argv[argi];
1.339     schwarze 1480:                                break;
                   1481:                        }
1.388     schwarze 1482:                        if (buf->buf[iarg] == '*')
1.339     schwarze 1483:                                quote_args = 0;
1.388     schwarze 1484:                        else if (buf->buf[iarg] == '@')
1.339     schwarze 1485:                                quote_args = 1;
                   1486:                        else {
1.388     schwarze 1487:                                mandoc_msg(MANDOCERR_ARG_NONUM, ln, iesc,
                   1488:                                    "%.*s", iend - iesc, buf->buf + iesc);
1.339     schwarze 1489:                                break;
                   1490:                        }
                   1491:                        asz = 0;
1.388     schwarze 1492:                        for (argi = 0; argi < ctx->argc; argi++) {
                   1493:                                if (argi)
1.339     schwarze 1494:                                        asz++;  /* blank */
                   1495:                                if (quote_args)
                   1496:                                        asz += 2;  /* quotes */
1.388     schwarze 1497:                                asz += strlen(ctx->argv[argi]);
1.339     schwarze 1498:                        }
1.388     schwarze 1499:                        if (asz != iend - iesc) {
                   1500:                                rsz = buf->sz - iend;
                   1501:                                if (asz < iend - iesc)
                   1502:                                        memmove(buf->buf + iesc + asz,
                   1503:                                            buf->buf + iend, rsz);
                   1504:                                buf->sz = iesc + asz + rsz;
                   1505:                                buf->buf = mandoc_realloc(buf->buf, buf->sz);
                   1506:                                if (asz > iend - iesc)
                   1507:                                        memmove(buf->buf + iesc + asz,
                   1508:                                            buf->buf + iend, rsz);
1.339     schwarze 1509:                        }
1.388     schwarze 1510:                        dst = buf->buf + iesc;
                   1511:                        for (argi = 0; argi < ctx->argc; argi++) {
                   1512:                                if (argi)
                   1513:                                        *dst++ = ' ';
1.339     schwarze 1514:                                if (quote_args)
1.388     schwarze 1515:                                        *dst++ = '"';
                   1516:                                src = ctx->argv[argi];
                   1517:                                while (*src != '\0')
                   1518:                                        *dst++ = *src++;
1.339     schwarze 1519:                                if (quote_args)
1.388     schwarze 1520:                                        *dst++ = '"';
1.339     schwarze 1521:                        }
                   1522:                        continue;
1.207     schwarze 1523:                case 'B':
1.206     schwarze 1524:                        npos = 0;
1.388     schwarze 1525:                        ubuf[0] = iendarg > iarg && iend > iendarg &&
                   1526:                            roff_evalnum(r, ln, buf->buf + iarg, &npos,
                   1527:                                         NULL, ROFFNUM_SCALE) &&
                   1528:                            npos == iendarg - iarg ? '1' : '0';
1.206     schwarze 1529:                        ubuf[1] = '\0';
1.388     schwarze 1530:                        res = ubuf;
1.206     schwarze 1531:                        break;
1.389   ! schwarze 1532:                case 'V':
        !          1533:                        mandoc_msg(MANDOCERR_UNSUPP, ln, iesc,
        !          1534:                            "%.*s", iend - iesc, buf->buf + iesc);
        !          1535:                        roff_expand_patch(buf, iendarg, "}", iend);
        !          1536:                        roff_expand_patch(buf, iesc, "${", iarg);
        !          1537:                        continue;
1.207     schwarze 1538:                case 'n':
1.388     schwarze 1539:                        if (iendarg > iarg)
1.218     schwarze 1540:                                (void)snprintf(ubuf, sizeof(ubuf), "%d",
1.388     schwarze 1541:                                    roff_getregn(r, buf->buf + iarg,
                   1542:                                    iendarg - iarg, buf->buf[inam + 1]));
1.218     schwarze 1543:                        else
                   1544:                                ubuf[0] = '\0';
1.388     schwarze 1545:                        res = ubuf;
1.206     schwarze 1546:                        break;
1.207     schwarze 1547:                case 'w':
1.388     schwarze 1548:                        (void)snprintf(ubuf, sizeof(ubuf),
                   1549:                            "%d", (iendarg - iarg) * 24);
                   1550:                        res = ubuf;
                   1551:                        break;
                   1552:                default:
1.206     schwarze 1553:                        break;
                   1554:                }
1.388     schwarze 1555:                if (res == NULL)
1.142     kristaps 1556:                        res = "";
1.388     schwarze 1557:                if (++expand_count > EXPAND_LIMIT ||
                   1558:                    buf->sz + strlen(res) > SHRT_MAX) {
                   1559:                        mandoc_msg(MANDOCERR_ROFFLOOP, ln, iesc, NULL);
1.277     schwarze 1560:                        return ROFF_IGN;
1.94      kristaps 1561:                }
1.388     schwarze 1562:                roff_expand_patch(buf, iesc, res, iend);
                   1563:        }
                   1564:        return ROFF_CONT;
                   1565: }
1.94      kristaps 1566:
1.388     schwarze 1567: /*
                   1568:  * Replace the substring from the start position (inclusive)
                   1569:  * to end position (exclusive) with the repl(acement) string.
                   1570:  */
                   1571: static void
                   1572: roff_expand_patch(struct buf *buf, int start, const char *repl, int end)
                   1573: {
                   1574:        char    *nbuf;
1.108     schwarze 1575:
1.389   ! schwarze 1576:        buf->sz = mandoc_asprintf(&nbuf, "%.*s%s%s", start, buf->buf,
        !          1577:            repl, buf->buf + end) + 1;
1.388     schwarze 1578:        free(buf->buf);
                   1579:        buf->buf = nbuf;
1.154     kristaps 1580: }
1.353     schwarze 1581:
                   1582: /*
                   1583:  * Parse a quoted or unquoted roff-style request or macro argument.
                   1584:  * Return a pointer to the parsed argument, which is either the original
                   1585:  * pointer or advanced by one byte in case the argument is quoted.
                   1586:  * NUL-terminate the argument in place.
                   1587:  * Collapse pairs of quotes inside quoted arguments.
                   1588:  * Advance the argument pointer to the next argument,
                   1589:  * or to the NUL byte terminating the argument line.
                   1590:  */
                   1591: char *
1.355     schwarze 1592: roff_getarg(struct roff *r, char **cpp, int ln, int *pos)
1.353     schwarze 1593: {
1.355     schwarze 1594:        struct buf       buf;
1.366     schwarze 1595:        char            *cp, *start;
1.355     schwarze 1596:        int              newesc, pairs, quoted, white;
1.353     schwarze 1597:
                   1598:        /* Quoting can only start with a new word. */
                   1599:        start = *cpp;
                   1600:        quoted = 0;
                   1601:        if ('"' == *start) {
                   1602:                quoted = 1;
                   1603:                start++;
                   1604:        }
                   1605:
1.355     schwarze 1606:        newesc = pairs = white = 0;
1.353     schwarze 1607:        for (cp = start; '\0' != *cp; cp++) {
                   1608:
                   1609:                /*
                   1610:                 * Move the following text left
                   1611:                 * after quoted quotes and after "\\" and "\t".
                   1612:                 */
                   1613:                if (pairs)
                   1614:                        cp[-pairs] = cp[0];
                   1615:
                   1616:                if ('\\' == cp[0]) {
                   1617:                        /*
                   1618:                         * In copy mode, translate double to single
                   1619:                         * backslashes and backslash-t to literal tabs.
                   1620:                         */
                   1621:                        switch (cp[1]) {
                   1622:                        case 'a':
                   1623:                        case 't':
1.354     schwarze 1624:                                cp[-pairs] = '\t';
1.355     schwarze 1625:                                pairs++;
                   1626:                                cp++;
                   1627:                                break;
1.353     schwarze 1628:                        case '\\':
1.355     schwarze 1629:                                newesc = 1;
                   1630:                                cp[-pairs] = ASCII_ESC;
1.353     schwarze 1631:                                pairs++;
                   1632:                                cp++;
                   1633:                                break;
                   1634:                        case ' ':
                   1635:                                /* Skip escaped blanks. */
                   1636:                                if (0 == quoted)
                   1637:                                        cp++;
                   1638:                                break;
                   1639:                        default:
                   1640:                                break;
                   1641:                        }
                   1642:                } else if (0 == quoted) {
                   1643:                        if (' ' == cp[0]) {
                   1644:                                /* Unescaped blanks end unquoted args. */
                   1645:                                white = 1;
                   1646:                                break;
                   1647:                        }
                   1648:                } else if ('"' == cp[0]) {
                   1649:                        if ('"' == cp[1]) {
                   1650:                                /* Quoted quotes collapse. */
                   1651:                                pairs++;
                   1652:                                cp++;
                   1653:                        } else {
                   1654:                                /* Unquoted quotes end quoted args. */
                   1655:                                quoted = 2;
                   1656:                                break;
                   1657:                        }
                   1658:                }
                   1659:        }
                   1660:
                   1661:        /* Quoted argument without a closing quote. */
                   1662:        if (1 == quoted)
                   1663:                mandoc_msg(MANDOCERR_ARG_QUOTE, ln, *pos, NULL);
                   1664:
                   1665:        /* NUL-terminate this argument and move to the next one. */
                   1666:        if (pairs)
                   1667:                cp[-pairs] = '\0';
                   1668:        if ('\0' != *cp) {
                   1669:                *cp++ = '\0';
                   1670:                while (' ' == *cp)
                   1671:                        cp++;
                   1672:        }
                   1673:        *pos += (int)(cp - start) + (quoted ? 1 : 0);
                   1674:        *cpp = cp;
                   1675:
                   1676:        if ('\0' == *cp && (white || ' ' == cp[-1]))
                   1677:                mandoc_msg(MANDOCERR_SPACE_EOL, ln, *pos, NULL);
                   1678:
1.355     schwarze 1679:        start = mandoc_strdup(start);
                   1680:        if (newesc == 0)
                   1681:                return start;
                   1682:
                   1683:        buf.buf = start;
                   1684:        buf.sz = strlen(start) + 1;
                   1685:        buf.next = NULL;
                   1686:        if (roff_expand(r, &buf, ln, 0, ASCII_ESC) & ROFF_IGN) {
                   1687:                free(buf.buf);
                   1688:                buf.buf = mandoc_strdup("");
                   1689:        }
                   1690:        return buf.buf;
1.353     schwarze 1691: }
                   1692:
1.154     kristaps 1693:
                   1694: /*
1.275     schwarze 1695:  * Process text streams.
1.154     kristaps 1696:  */
1.340     schwarze 1697: static int
1.305     schwarze 1698: roff_parsetext(struct roff *r, struct buf *buf, int pos, int *offs)
1.154     kristaps 1699: {
                   1700:        size_t           sz;
                   1701:        const char      *start;
1.178     schwarze 1702:        char            *p;
                   1703:        int              isz;
1.154     kristaps 1704:        enum mandoc_esc  esc;
                   1705:
1.275     schwarze 1706:        /* Spring the input line trap. */
                   1707:
                   1708:        if (roffit_lines == 1) {
                   1709:                isz = mandoc_asprintf(&p, "%s\n.%s", buf->buf, roffit_macro);
                   1710:                free(buf->buf);
                   1711:                buf->buf = p;
                   1712:                buf->sz = isz + 1;
                   1713:                *offs = 0;
                   1714:                free(roffit_macro);
                   1715:                roffit_lines = 0;
1.277     schwarze 1716:                return ROFF_REPARSE;
1.275     schwarze 1717:        } else if (roffit_lines > 1)
                   1718:                --roffit_lines;
                   1719:
1.305     schwarze 1720:        if (roffce_node != NULL && buf->buf[pos] != '\0') {
                   1721:                if (roffce_lines < 1) {
                   1722:                        r->man->last = roffce_node;
                   1723:                        r->man->next = ROFF_NEXT_SIBLING;
                   1724:                        roffce_lines = 0;
                   1725:                        roffce_node = NULL;
                   1726:                } else
                   1727:                        roffce_lines--;
                   1728:        }
                   1729:
1.275     schwarze 1730:        /* Convert all breakable hyphens into ASCII_HYPH. */
                   1731:
1.238     schwarze 1732:        start = p = buf->buf + pos;
1.154     kristaps 1733:
1.238     schwarze 1734:        while (*p != '\0') {
1.154     kristaps 1735:                sz = strcspn(p, "-\\");
                   1736:                p += sz;
                   1737:
1.238     schwarze 1738:                if (*p == '\0')
1.159     kristaps 1739:                        break;
                   1740:
1.238     schwarze 1741:                if (*p == '\\') {
1.154     kristaps 1742:                        /* Skip over escapes. */
                   1743:                        p++;
1.189     schwarze 1744:                        esc = mandoc_escape((const char **)&p, NULL, NULL);
1.238     schwarze 1745:                        if (esc == ESCAPE_ERROR)
1.154     kristaps 1746:                                break;
1.264     schwarze 1747:                        while (*p == '-')
                   1748:                                p++;
1.155     kristaps 1749:                        continue;
1.159     kristaps 1750:                } else if (p == start) {
1.158     kristaps 1751:                        p++;
1.155     kristaps 1752:                        continue;
1.158     kristaps 1753:                }
1.155     kristaps 1754:
1.171     schwarze 1755:                if (isalpha((unsigned char)p[-1]) &&
                   1756:                    isalpha((unsigned char)p[1]))
1.155     kristaps 1757:                        *p = ASCII_HYPH;
                   1758:                p++;
1.94      kristaps 1759:        }
1.277     schwarze 1760:        return ROFF_CONT;
1.94      kristaps 1761: }
                   1762:
1.340     schwarze 1763: int
1.377     schwarze 1764: roff_parseln(struct roff *r, int ln, struct buf *buf, int *offs, size_t len)
1.67      kristaps 1765: {
1.294     schwarze 1766:        enum roff_tok    t;
1.340     schwarze 1767:        int              e;
1.238     schwarze 1768:        int              pos;   /* parse point */
1.243     schwarze 1769:        int              spos;  /* saved parse point for messages */
1.238     schwarze 1770:        int              ppos;  /* original offset in buf->buf */
                   1771:        int              ctl;   /* macro line (boolean) */
                   1772:
                   1773:        ppos = pos = *offs;
1.377     schwarze 1774:
                   1775:        if (len > 80 && r->tbl == NULL && r->eqn == NULL &&
                   1776:            (r->man->flags & ROFF_NOFILL) == 0 &&
                   1777:            strchr(" .\\", buf->buf[pos]) == NULL &&
                   1778:            buf->buf[pos] != r->control &&
                   1779:            strcspn(buf->buf, " ") < 80)
                   1780:                mandoc_msg(MANDOCERR_TEXT_LONG, ln, (int)len - 1,
                   1781:                    "%.20s...", buf->buf + pos);
1.79      kristaps 1782:
1.230     schwarze 1783:        /* Handle in-line equation delimiters. */
                   1784:
1.236     schwarze 1785:        if (r->tbl == NULL &&
                   1786:            r->last_eqn != NULL && r->last_eqn->delim &&
1.230     schwarze 1787:            (r->eqn == NULL || r->eqn_inline)) {
1.238     schwarze 1788:                e = roff_eqndelim(r, buf, pos);
1.230     schwarze 1789:                if (e == ROFF_REPARSE)
1.277     schwarze 1790:                        return e;
1.230     schwarze 1791:                assert(e == ROFF_CONT);
                   1792:        }
                   1793:
1.387     schwarze 1794:        /* Handle comments and escape sequences. */
                   1795:
                   1796:        e = roff_parse_comment(r, buf, ln, pos, r->escape);
                   1797:        if ((e & ROFF_MASK) == ROFF_IGN)
                   1798:                return e;
                   1799:        assert(e == ROFF_CONT);
1.94      kristaps 1800:
1.355     schwarze 1801:        e = roff_expand(r, buf, ln, pos, r->escape);
1.340     schwarze 1802:        if ((e & ROFF_MASK) == ROFF_IGN)
1.277     schwarze 1803:                return e;
1.238     schwarze 1804:        assert(e == ROFF_CONT);
1.94      kristaps 1805:
1.238     schwarze 1806:        ctl = roff_getcontrol(r, buf->buf, &pos);
1.130     kristaps 1807:
1.94      kristaps 1808:        /*
1.79      kristaps 1809:         * First, if a scope is open and we're not a macro, pass the
1.252     schwarze 1810:         * text through the macro's filter.
                   1811:         * Equations process all content themselves.
                   1812:         * Tables process almost all content themselves, but we want
                   1813:         * to warn about macros before passing it there.
1.79      kristaps 1814:         */
1.74      kristaps 1815:
1.252     schwarze 1816:        if (r->last != NULL && ! ctl) {
1.78      kristaps 1817:                t = r->last->tok;
1.238     schwarze 1818:                e = (*roffs[t].text)(r, t, buf, ln, pos, pos, offs);
1.340     schwarze 1819:                if ((e & ROFF_MASK) == ROFF_IGN)
1.277     schwarze 1820:                        return e;
1.340     schwarze 1821:                e &= ~ROFF_MASK;
                   1822:        } else
                   1823:                e = ROFF_IGN;
1.319     schwarze 1824:        if (r->eqn != NULL && strncmp(buf->buf + ppos, ".EN", 3)) {
                   1825:                eqn_read(r->eqn, buf->buf + ppos);
1.340     schwarze 1826:                return e;
1.319     schwarze 1827:        }
1.321     schwarze 1828:        if (r->tbl != NULL && (ctl == 0 || buf->buf[pos] == '\0')) {
                   1829:                tbl_read(r->tbl, ln, buf->buf, ppos);
1.346     schwarze 1830:                roff_addtbl(r->man, ln, r->tbl);
1.340     schwarze 1831:                return e;
1.321     schwarze 1832:        }
1.367     schwarze 1833:        if ( ! ctl) {
                   1834:                r->options &= ~MPARSE_COMMENT;
1.340     schwarze 1835:                return roff_parsetext(r, buf, pos, offs) | e;
1.367     schwarze 1836:        }
1.228     schwarze 1837:
                   1838:        /* Skip empty request lines. */
                   1839:
1.238     schwarze 1840:        if (buf->buf[pos] == '"') {
1.350     schwarze 1841:                mandoc_msg(MANDOCERR_COMMENT_BAD, ln, pos, NULL);
1.277     schwarze 1842:                return ROFF_IGN;
1.238     schwarze 1843:        } else if (buf->buf[pos] == '\0')
1.277     schwarze 1844:                return ROFF_IGN;
1.67      kristaps 1845:
1.79      kristaps 1846:        /*
                   1847:         * If a scope is open, go to the child handler for that macro,
                   1848:         * as it may want to preprocess before doing anything with it.
                   1849:         */
1.78      kristaps 1850:
1.79      kristaps 1851:        if (r->last) {
                   1852:                t = r->last->tok;
1.277     schwarze 1853:                return (*roffs[t].sub)(r, t, buf, ln, ppos, pos, offs);
1.79      kristaps 1854:        }
1.78      kristaps 1855:
1.367     schwarze 1856:        r->options &= ~MPARSE_COMMENT;
1.243     schwarze 1857:        spos = pos;
                   1858:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.386     schwarze 1859:        return roff_req_or_macro(r, t, buf, ln, spos, pos, offs);
                   1860: }
                   1861:
                   1862: /*
                   1863:  * Handle a new request or macro.
                   1864:  * May be called outside any scope or from inside a conditional scope.
                   1865:  */
                   1866: static int
                   1867: roff_req_or_macro(ROFF_ARGS) {
1.243     schwarze 1868:
1.386     schwarze 1869:        /* For now, tables ignore most macros and some request. */
1.243     schwarze 1870:
1.386     schwarze 1871:        if (r->tbl != NULL && (tok == TOKEN_NONE || tok == ROFF_TS ||
                   1872:            tok == ROFF_br || tok == ROFF_ce || tok == ROFF_rj ||
                   1873:            tok == ROFF_sp)) {
1.350     schwarze 1874:                mandoc_msg(MANDOCERR_TBLMACRO,
1.386     schwarze 1875:                    ln, ppos, "%s", buf->buf + ppos);
                   1876:                if (tok != TOKEN_NONE)
1.277     schwarze 1877:                        return ROFF_IGN;
1.257     schwarze 1878:                while (buf->buf[pos] != '\0' && buf->buf[pos] != ' ')
                   1879:                        pos++;
1.291     schwarze 1880:                while (buf->buf[pos] == ' ')
1.257     schwarze 1881:                        pos++;
1.321     schwarze 1882:                tbl_read(r->tbl, ln, buf->buf, pos);
1.346     schwarze 1883:                roff_addtbl(r->man, ln, r->tbl);
1.321     schwarze 1884:                return ROFF_IGN;
1.243     schwarze 1885:        }
                   1886:
1.305     schwarze 1887:        /* For now, let high level macros abort .ce mode. */
                   1888:
1.386     schwarze 1889:        if (roffce_node != NULL &&
                   1890:            (tok == TOKEN_NONE || tok == ROFF_Dd || tok == ROFF_EQ ||
                   1891:             tok == ROFF_TH || tok == ROFF_TS)) {
1.305     schwarze 1892:                r->man->last = roffce_node;
                   1893:                r->man->next = ROFF_NEXT_SIBLING;
                   1894:                roffce_lines = 0;
                   1895:                roffce_node = NULL;
                   1896:        }
                   1897:
1.79      kristaps 1898:        /*
1.243     schwarze 1899:         * This is neither a roff request nor a user-defined macro.
                   1900:         * Let the standard macro set parsers handle it.
1.79      kristaps 1901:         */
1.67      kristaps 1902:
1.386     schwarze 1903:        if (tok == TOKEN_NONE)
1.277     schwarze 1904:                return ROFF_CONT;
1.243     schwarze 1905:
1.386     schwarze 1906:        /* Execute a roff request or a user-defined macro. */
1.67      kristaps 1907:
1.386     schwarze 1908:        return (*roffs[tok].proc)(r, tok, buf, ln, ppos, pos, offs);
1.74      kristaps 1909: }
                   1910:
1.339     schwarze 1911: /*
                   1912:  * Internal interface function to tell the roff parser that execution
                   1913:  * of the current macro ended.  This is required because macro
                   1914:  * definitions usually do not end with a .return request.
                   1915:  */
                   1916: void
                   1917: roff_userret(struct roff *r)
                   1918: {
                   1919:        struct mctx     *ctx;
                   1920:        int              i;
                   1921:
                   1922:        assert(r->mstackpos >= 0);
                   1923:        ctx = r->mstack + r->mstackpos;
                   1924:        for (i = 0; i < ctx->argc; i++)
                   1925:                free(ctx->argv[i]);
                   1926:        ctx->argc = 0;
                   1927:        r->mstackpos--;
                   1928: }
                   1929:
1.117     kristaps 1930: void
1.74      kristaps 1931: roff_endparse(struct roff *r)
                   1932: {
1.321     schwarze 1933:        if (r->last != NULL)
1.350     schwarze 1934:                mandoc_msg(MANDOCERR_BLK_NOEND, r->last->line,
                   1935:                    r->last->col, "%s", roff_name[r->last->tok]);
1.117     kristaps 1936:
1.321     schwarze 1937:        if (r->eqn != NULL) {
1.350     schwarze 1938:                mandoc_msg(MANDOCERR_BLK_NOEND,
1.319     schwarze 1939:                    r->eqn->node->line, r->eqn->node->pos, "EQ");
                   1940:                eqn_parse(r->eqn);
                   1941:                r->eqn = NULL;
1.125     kristaps 1942:        }
                   1943:
1.321     schwarze 1944:        if (r->tbl != NULL) {
1.346     schwarze 1945:                tbl_end(r->tbl, 1);
1.321     schwarze 1946:                r->tbl = NULL;
1.117     kristaps 1947:        }
1.67      kristaps 1948: }
                   1949:
                   1950: /*
1.386     schwarze 1951:  * Parse the request or macro name at buf[*pos].
                   1952:  * Return ROFF_RENAMED, ROFF_USERDEF, or a ROFF_* token value.
                   1953:  * For empty, undefined, mdoc(7), and man(7) macros, return TOKEN_NONE.
                   1954:  * As a side effect, set r->current_string to the definition or to NULL.
1.67      kristaps 1955:  */
1.294     schwarze 1956: static enum roff_tok
1.214     schwarze 1957: roff_parse(struct roff *r, char *buf, int *pos, int ln, int ppos)
1.67      kristaps 1958: {
1.214     schwarze 1959:        char            *cp;
1.106     kristaps 1960:        const char      *mac;
                   1961:        size_t           maclen;
1.315     schwarze 1962:        int              deftype;
1.294     schwarze 1963:        enum roff_tok    t;
1.67      kristaps 1964:
1.214     schwarze 1965:        cp = buf + *pos;
                   1966:
                   1967:        if ('\0' == *cp || '"' == *cp || '\t' == *cp || ' ' == *cp)
1.294     schwarze 1968:                return TOKEN_NONE;
1.67      kristaps 1969:
1.214     schwarze 1970:        mac = cp;
                   1971:        maclen = roff_getname(r, &cp, ln, ppos);
1.67      kristaps 1972:
1.315     schwarze 1973:        deftype = ROFFDEF_USER | ROFFDEF_REN;
                   1974:        r->current_string = roff_getstrn(r, mac, maclen, &deftype);
                   1975:        switch (deftype) {
                   1976:        case ROFFDEF_USER:
                   1977:                t = ROFF_USERDEF;
                   1978:                break;
                   1979:        case ROFFDEF_REN:
                   1980:                t = ROFF_RENAMED;
                   1981:                break;
                   1982:        default:
                   1983:                t = roffhash_find(r->reqtab, mac, maclen);
                   1984:                break;
                   1985:        }
1.294     schwarze 1986:        if (t != TOKEN_NONE)
1.214     schwarze 1987:                *pos = cp - buf;
1.325     schwarze 1988:        else if (deftype == ROFFDEF_UNDEF) {
                   1989:                /* Using an undefined macro defines it to be empty. */
                   1990:                roff_setstrn(&r->strtab, mac, maclen, "", 0, 0);
                   1991:                roff_setstrn(&r->rentab, mac, maclen, NULL, 0, 0);
                   1992:        }
1.277     schwarze 1993:        return t;
1.67      kristaps 1994: }
                   1995:
1.266     schwarze 1996: /* --- handling of request blocks ----------------------------------------- */
                   1997:
1.375     schwarze 1998: /*
                   1999:  * Close a macro definition block or an "ignore" block.
                   2000:  */
1.340     schwarze 2001: static int
1.76      kristaps 2002: roff_cblock(ROFF_ARGS)
1.67      kristaps 2003: {
1.375     schwarze 2004:        int      rr;
1.79      kristaps 2005:
1.238     schwarze 2006:        if (r->last == NULL) {
1.350     schwarze 2007:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, ln, ppos, "..");
1.277     schwarze 2008:                return ROFF_IGN;
1.76      kristaps 2009:        }
1.67      kristaps 2010:
1.81      kristaps 2011:        switch (r->last->tok) {
1.207     schwarze 2012:        case ROFF_am:
                   2013:        case ROFF_ami:
                   2014:        case ROFF_de:
                   2015:        case ROFF_dei:
                   2016:        case ROFF_ig:
1.81      kristaps 2017:                break;
1.375     schwarze 2018:        case ROFF_am1:
                   2019:        case ROFF_de1:
                   2020:                /* Remapped in roff_block(). */
                   2021:                abort();
1.81      kristaps 2022:        default:
1.350     schwarze 2023:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, ln, ppos, "..");
1.277     schwarze 2024:                return ROFF_IGN;
1.76      kristaps 2025:        }
1.67      kristaps 2026:
1.375     schwarze 2027:        roffnode_pop(r);
                   2028:        roffnode_cleanscope(r);
                   2029:
                   2030:        /*
                   2031:         * If a conditional block with braces is still open,
                   2032:         * check for "\}" block end markers.
                   2033:         */
                   2034:
                   2035:        if (r->last != NULL && r->last->endspan < 0) {
                   2036:                rr = 1;  /* If arguments follow "\}", warn about them. */
                   2037:                roff_cond_checkend(r, tok, buf, ln, ppos, pos, &rr);
                   2038:        }
                   2039:
1.238     schwarze 2040:        if (buf->buf[pos] != '\0')
1.350     schwarze 2041:                mandoc_msg(MANDOCERR_ARG_SKIP, ln, pos,
1.238     schwarze 2042:                    ".. %s", buf->buf + pos);
1.71      kristaps 2043:
1.277     schwarze 2044:        return ROFF_IGN;
1.67      kristaps 2045: }
                   2046:
1.364     schwarze 2047: /*
                   2048:  * Pop all nodes ending at the end of the current input line.
                   2049:  * Return the number of loops ended.
                   2050:  */
1.340     schwarze 2051: static int
1.76      kristaps 2052: roffnode_cleanscope(struct roff *r)
1.67      kristaps 2053: {
1.340     schwarze 2054:        int inloop;
1.67      kristaps 2055:
1.340     schwarze 2056:        inloop = 0;
1.375     schwarze 2057:        while (r->last != NULL && r->last->endspan > 0) {
1.173     schwarze 2058:                if (--r->last->endspan != 0)
1.76      kristaps 2059:                        break;
1.340     schwarze 2060:                inloop += roffnode_pop(r);
1.76      kristaps 2061:        }
1.340     schwarze 2062:        return inloop;
1.67      kristaps 2063: }
                   2064:
1.364     schwarze 2065: /*
1.375     schwarze 2066:  * Handle the closing "\}" of a conditional block.
1.364     schwarze 2067:  * Apart from generating warnings, this only pops nodes.
                   2068:  * Return the number of loops ended.
                   2069:  */
1.340     schwarze 2070: static int
1.195     schwarze 2071: roff_ccond(struct roff *r, int ln, int ppos)
1.74      kristaps 2072: {
1.76      kristaps 2073:        if (NULL == r->last) {
1.350     schwarze 2074:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, ln, ppos, "\\}");
1.340     schwarze 2075:                return 0;
1.76      kristaps 2076:        }
                   2077:
1.82      kristaps 2078:        switch (r->last->tok) {
1.207     schwarze 2079:        case ROFF_el:
                   2080:        case ROFF_ie:
                   2081:        case ROFF_if:
1.340     schwarze 2082:        case ROFF_while:
1.82      kristaps 2083:                break;
                   2084:        default:
1.350     schwarze 2085:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, ln, ppos, "\\}");
1.340     schwarze 2086:                return 0;
1.75      kristaps 2087:        }
                   2088:
1.76      kristaps 2089:        if (r->last->endspan > -1) {
1.350     schwarze 2090:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, ln, ppos, "\\}");
1.340     schwarze 2091:                return 0;
1.76      kristaps 2092:        }
                   2093:
1.340     schwarze 2094:        return roffnode_pop(r) + roffnode_cleanscope(r);
1.76      kristaps 2095: }
                   2096:
1.340     schwarze 2097: static int
1.80      kristaps 2098: roff_block(ROFF_ARGS)
1.76      kristaps 2099: {
1.315     schwarze 2100:        const char      *name, *value;
                   2101:        char            *call, *cp, *iname, *rname;
                   2102:        size_t           csz, namesz, rsz;
                   2103:        int              deftype;
1.106     kristaps 2104:
1.220     schwarze 2105:        /* Ignore groff compatibility mode for now. */
1.76      kristaps 2106:
1.238     schwarze 2107:        if (tok == ROFF_de1)
1.220     schwarze 2108:                tok = ROFF_de;
1.251     schwarze 2109:        else if (tok == ROFF_dei1)
                   2110:                tok = ROFF_dei;
1.238     schwarze 2111:        else if (tok == ROFF_am1)
1.220     schwarze 2112:                tok = ROFF_am;
1.251     schwarze 2113:        else if (tok == ROFF_ami1)
                   2114:                tok = ROFF_ami;
1.220     schwarze 2115:
                   2116:        /* Parse the macro name argument. */
                   2117:
1.238     schwarze 2118:        cp = buf->buf + pos;
                   2119:        if (tok == ROFF_ig) {
1.220     schwarze 2120:                iname = NULL;
                   2121:                namesz = 0;
                   2122:        } else {
                   2123:                iname = cp;
                   2124:                namesz = roff_getname(r, &cp, ln, ppos);
                   2125:                iname[namesz] = '\0';
                   2126:        }
1.107     kristaps 2127:
1.220     schwarze 2128:        /* Resolve the macro name argument if it is indirect. */
1.107     kristaps 2129:
1.238     schwarze 2130:        if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
1.315     schwarze 2131:                deftype = ROFFDEF_USER;
                   2132:                name = roff_getstrn(r, iname, namesz, &deftype);
                   2133:                if (name == NULL) {
1.350     schwarze 2134:                        mandoc_msg(MANDOCERR_STR_UNDEF,
                   2135:                            ln, (int)(iname - buf->buf),
1.220     schwarze 2136:                            "%.*s", (int)namesz, iname);
                   2137:                        namesz = 0;
                   2138:                } else
                   2139:                        namesz = strlen(name);
                   2140:        } else
                   2141:                name = iname;
1.107     kristaps 2142:
1.238     schwarze 2143:        if (namesz == 0 && tok != ROFF_ig) {
1.350     schwarze 2144:                mandoc_msg(MANDOCERR_REQ_EMPTY,
                   2145:                    ln, ppos, "%s", roff_name[tok]);
1.277     schwarze 2146:                return ROFF_IGN;
1.220     schwarze 2147:        }
1.80      kristaps 2148:
1.106     kristaps 2149:        roffnode_push(r, tok, name, ln, ppos);
                   2150:
                   2151:        /*
                   2152:         * At the beginning of a `de' macro, clear the existing string
                   2153:         * with the same name, if there is one.  New content will be
1.193     schwarze 2154:         * appended from roff_block_text() in multiline mode.
1.106     kristaps 2155:         */
1.107     kristaps 2156:
1.311     schwarze 2157:        if (tok == ROFF_de || tok == ROFF_dei) {
1.213     schwarze 2158:                roff_setstrn(&r->strtab, name, namesz, "", 0, 0);
1.311     schwarze 2159:                roff_setstrn(&r->rentab, name, namesz, NULL, 0, 0);
1.315     schwarze 2160:        } else if (tok == ROFF_am || tok == ROFF_ami) {
                   2161:                deftype = ROFFDEF_ANY;
                   2162:                value = roff_getstrn(r, iname, namesz, &deftype);
                   2163:                switch (deftype) {  /* Before appending, ... */
                   2164:                case ROFFDEF_PRE: /* copy predefined to user-defined. */
                   2165:                        roff_setstrn(&r->strtab, name, namesz,
                   2166:                            value, strlen(value), 0);
                   2167:                        break;
                   2168:                case ROFFDEF_REN: /* call original standard macro. */
                   2169:                        csz = mandoc_asprintf(&call, ".%.*s \\$* \\\"\n",
                   2170:                            (int)strlen(value), value);
                   2171:                        roff_setstrn(&r->strtab, name, namesz, call, csz, 0);
                   2172:                        roff_setstrn(&r->rentab, name, namesz, NULL, 0, 0);
                   2173:                        free(call);
                   2174:                        break;
                   2175:                case ROFFDEF_STD:  /* rename and call standard macro. */
                   2176:                        rsz = mandoc_asprintf(&rname, "__%s_renamed", name);
                   2177:                        roff_setstrn(&r->rentab, rname, rsz, name, namesz, 0);
                   2178:                        csz = mandoc_asprintf(&call, ".%.*s \\$* \\\"\n",
                   2179:                            (int)rsz, rname);
                   2180:                        roff_setstrn(&r->strtab, name, namesz, call, csz, 0);
                   2181:                        free(call);
                   2182:                        free(rname);
                   2183:                        break;
                   2184:                default:
                   2185:                        break;
                   2186:                }
1.311     schwarze 2187:        }
1.76      kristaps 2188:
1.238     schwarze 2189:        if (*cp == '\0')
1.277     schwarze 2190:                return ROFF_IGN;
1.78      kristaps 2191:
1.220     schwarze 2192:        /* Get the custom end marker. */
1.107     kristaps 2193:
1.220     schwarze 2194:        iname = cp;
1.213     schwarze 2195:        namesz = roff_getname(r, &cp, ln, ppos);
1.220     schwarze 2196:
                   2197:        /* Resolve the end marker if it is indirect. */
                   2198:
1.238     schwarze 2199:        if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
1.315     schwarze 2200:                deftype = ROFFDEF_USER;
                   2201:                name = roff_getstrn(r, iname, namesz, &deftype);
                   2202:                if (name == NULL) {
1.350     schwarze 2203:                        mandoc_msg(MANDOCERR_STR_UNDEF,
                   2204:                            ln, (int)(iname - buf->buf),
1.220     schwarze 2205:                            "%.*s", (int)namesz, iname);
                   2206:                        namesz = 0;
                   2207:                } else
                   2208:                        namesz = strlen(name);
                   2209:        } else
                   2210:                name = iname;
                   2211:
1.213     schwarze 2212:        if (namesz)
                   2213:                r->last->end = mandoc_strndup(name, namesz);
1.78      kristaps 2214:
1.238     schwarze 2215:        if (*cp != '\0')
1.350     schwarze 2216:                mandoc_msg(MANDOCERR_ARG_EXCESS,
1.295     schwarze 2217:                    ln, pos, ".%s ... %s", roff_name[tok], cp);
1.74      kristaps 2218:
1.277     schwarze 2219:        return ROFF_IGN;
1.78      kristaps 2220: }
                   2221:
1.340     schwarze 2222: static int
1.80      kristaps 2223: roff_block_sub(ROFF_ARGS)
1.79      kristaps 2224: {
1.294     schwarze 2225:        enum roff_tok   t;
1.79      kristaps 2226:        int             i, j;
                   2227:
                   2228:        /*
1.385     schwarze 2229:         * If a custom end marker is a user-defined or predefined macro
                   2230:         * or a request, interpret it.
1.79      kristaps 2231:         */
                   2232:
                   2233:        if (r->last->end) {
1.130     kristaps 2234:                for (i = pos, j = 0; r->last->end[j]; j++, i++)
1.238     schwarze 2235:                        if (buf->buf[i] != r->last->end[j])
1.79      kristaps 2236:                                break;
                   2237:
1.238     schwarze 2238:                if (r->last->end[j] == '\0' &&
                   2239:                    (buf->buf[i] == '\0' ||
                   2240:                     buf->buf[i] == ' ' ||
                   2241:                     buf->buf[i] == '\t')) {
1.79      kristaps 2242:                        roffnode_pop(r);
                   2243:                        roffnode_cleanscope(r);
                   2244:
1.238     schwarze 2245:                        while (buf->buf[i] == ' ' || buf->buf[i] == '\t')
1.130     kristaps 2246:                                i++;
                   2247:
                   2248:                        pos = i;
1.238     schwarze 2249:                        if (roff_parse(r, buf->buf, &pos, ln, ppos) !=
1.294     schwarze 2250:                            TOKEN_NONE)
1.277     schwarze 2251:                                return ROFF_RERUN;
                   2252:                        return ROFF_IGN;
1.79      kristaps 2253:                }
                   2254:        }
                   2255:
1.385     schwarze 2256:        /* Handle the standard end marker. */
1.79      kristaps 2257:
1.238     schwarze 2258:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.385     schwarze 2259:        if (t == ROFF_cblock)
                   2260:                return roff_cblock(r, t, buf, ln, ppos, pos, offs);
1.79      kristaps 2261:
1.385     schwarze 2262:        /* Not an end marker, so append the line to the block. */
1.79      kristaps 2263:
1.385     schwarze 2264:        if (tok != ROFF_ig)
                   2265:                roff_setstr(r, r->last->name, buf->buf + ppos, 2);
                   2266:        return ROFF_IGN;
1.79      kristaps 2267: }
                   2268:
1.340     schwarze 2269: static int
1.80      kristaps 2270: roff_block_text(ROFF_ARGS)
1.78      kristaps 2271: {
                   2272:
1.238     schwarze 2273:        if (tok != ROFF_ig)
                   2274:                roff_setstr(r, r->last->name, buf->buf + pos, 2);
1.106     kristaps 2275:
1.277     schwarze 2276:        return ROFF_IGN;
1.78      kristaps 2277: }
                   2278:
1.375     schwarze 2279: /*
                   2280:  * Check for a closing "\}" and handle it.
                   2281:  * In this function, the final "int *offs" argument is used for
                   2282:  * different purposes than elsewhere:
                   2283:  * Input: *offs == 0: caller wants to discard arguments following \}
                   2284:  *        *offs == 1: caller wants to preserve text following \}
                   2285:  * Output: *offs = 0: tell caller to discard input line
                   2286:  *         *offs = 1: tell caller to use input line
                   2287:  */
1.340     schwarze 2288: static int
1.375     schwarze 2289: roff_cond_checkend(ROFF_ARGS)
1.82      kristaps 2290: {
1.340     schwarze 2291:        char            *ep;
                   2292:        int              endloop, irc, rr;
1.82      kristaps 2293:
1.340     schwarze 2294:        irc = ROFF_IGN;
1.82      kristaps 2295:        rr = r->last->rule;
1.340     schwarze 2296:        endloop = tok != ROFF_while ? ROFF_IGN :
                   2297:            rr ? ROFF_LOOPCONT : ROFF_LOOPEXIT;
                   2298:        if (roffnode_cleanscope(r))
                   2299:                irc |= endloop;
1.144     kristaps 2300:
1.196     schwarze 2301:        /*
1.375     schwarze 2302:         * If "\}" occurs on a macro line without a preceding macro or
                   2303:         * a text line contains nothing else, drop the line completely.
1.196     schwarze 2304:         */
                   2305:
1.238     schwarze 2306:        ep = buf->buf + pos;
1.375     schwarze 2307:        if (ep[0] == '\\' && ep[1] == '}' && (ep[2] == '\0' || *offs == 0))
1.198     schwarze 2308:                rr = 0;
1.196     schwarze 2309:
1.343     schwarze 2310:        /*
1.375     schwarze 2311:         * The closing delimiter "\}" rewinds the conditional scope
1.343     schwarze 2312:         * but is otherwise ignored when interpreting the line.
                   2313:         */
1.144     kristaps 2314:
1.238     schwarze 2315:        while ((ep = strchr(ep, '\\')) != NULL) {
1.318     schwarze 2316:                switch (ep[1]) {
                   2317:                case '}':
1.376     schwarze 2318:                        if (ep[2] == '\0')
                   2319:                                ep[0] = '\0';
                   2320:                        else if (rr)
1.375     schwarze 2321:                                ep[1] = '&';
                   2322:                        else
                   2323:                                memmove(ep, ep + 2, strlen(ep + 2) + 1);
1.340     schwarze 2324:                        if (roff_ccond(r, ln, ep - buf->buf))
                   2325:                                irc |= endloop;
1.318     schwarze 2326:                        break;
                   2327:                case '\0':
                   2328:                        ++ep;
                   2329:                        break;
                   2330:                default:
                   2331:                        ep += 2;
                   2332:                        break;
1.197     schwarze 2333:                }
1.177     schwarze 2334:        }
1.375     schwarze 2335:        *offs = rr;
                   2336:        return irc;
                   2337: }
1.318     schwarze 2338:
1.375     schwarze 2339: /*
                   2340:  * Parse and process a request or macro line in conditional scope.
                   2341:  */
                   2342: static int
                   2343: roff_cond_sub(ROFF_ARGS)
                   2344: {
                   2345:        struct roffnode *bl;
1.386     schwarze 2346:        int              irc, rr, spos;
1.375     schwarze 2347:        enum roff_tok    t;
                   2348:
                   2349:        rr = 0;  /* If arguments follow "\}", skip them. */
                   2350:        irc = roff_cond_checkend(r, tok, buf, ln, ppos, pos, &rr);
1.386     schwarze 2351:        spos = pos;
1.368     schwarze 2352:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
                   2353:
1.318     schwarze 2354:        /*
1.386     schwarze 2355:         * Handle requests and macros if the conditional evaluated
                   2356:         * to true or if they are structurally required.
                   2357:         * The .break request is always handled specially.
1.318     schwarze 2358:         */
                   2359:
1.364     schwarze 2360:        if (t == ROFF_break) {
                   2361:                if (irc & ROFF_LOOPMASK)
                   2362:                        irc = ROFF_IGN | ROFF_LOOPEXIT;
                   2363:                else if (rr) {
                   2364:                        for (bl = r->last; bl != NULL; bl = bl->parent) {
                   2365:                                bl->rule = 0;
                   2366:                                if (bl->tok == ROFF_while)
                   2367:                                        break;
                   2368:                        }
                   2369:                }
1.386     schwarze 2370:        } else if (rr || (t < TOKEN_NONE && roffs[t].flags & ROFFMAC_STRUCT)) {
                   2371:                irc |= roff_req_or_macro(r, t, buf, ln, spos, pos, offs);
1.383     schwarze 2372:                if (irc & ROFF_WHILE)
                   2373:                        irc &= ~(ROFF_LOOPCONT | ROFF_LOOPEXIT);
1.386     schwarze 2374:        }
1.340     schwarze 2375:        return irc;
1.82      kristaps 2376: }
                   2377:
1.375     schwarze 2378: /*
                   2379:  * Parse and process a text line in conditional scope.
                   2380:  */
1.340     schwarze 2381: static int
1.82      kristaps 2382: roff_cond_text(ROFF_ARGS)
1.78      kristaps 2383: {
1.375     schwarze 2384:        int      irc, rr;
1.343     schwarze 2385:
1.375     schwarze 2386:        rr = 1;  /* If arguments follow "\}", preserve them. */
                   2387:        irc = roff_cond_checkend(r, tok, buf, ln, ppos, pos, &rr);
1.340     schwarze 2388:        if (rr)
                   2389:                irc |= ROFF_CONT;
                   2390:        return irc;
1.74      kristaps 2391: }
                   2392:
1.266     schwarze 2393: /* --- handling of numeric and conditional expressions -------------------- */
                   2394:
1.204     schwarze 2395: /*
                   2396:  * Parse a single signed integer number.  Stop at the first non-digit.
                   2397:  * If there is at least one digit, return success and advance the
                   2398:  * parse point, else return failure and let the parse point unchanged.
                   2399:  * Ignore overflows, treat them just like the C language.
                   2400:  */
1.184     schwarze 2401: static int
1.261     schwarze 2402: roff_getnum(const char *v, int *pos, int *res, int flags)
1.184     schwarze 2403: {
1.261     schwarze 2404:        int      myres, scaled, n, p;
1.206     schwarze 2405:
                   2406:        if (NULL == res)
                   2407:                res = &myres;
1.184     schwarze 2408:
                   2409:        p = *pos;
                   2410:        n = v[p] == '-';
1.261     schwarze 2411:        if (n || v[p] == '+')
1.184     schwarze 2412:                p++;
                   2413:
1.261     schwarze 2414:        if (flags & ROFFNUM_WHITE)
                   2415:                while (isspace((unsigned char)v[p]))
                   2416:                        p++;
                   2417:
1.184     schwarze 2418:        for (*res = 0; isdigit((unsigned char)v[p]); p++)
1.204     schwarze 2419:                *res = 10 * *res + v[p] - '0';
1.184     schwarze 2420:        if (p == *pos + n)
                   2421:                return 0;
                   2422:
                   2423:        if (n)
                   2424:                *res = -*res;
                   2425:
1.254     schwarze 2426:        /* Each number may be followed by one optional scaling unit. */
                   2427:
                   2428:        switch (v[p]) {
                   2429:        case 'f':
1.261     schwarze 2430:                scaled = *res * 65536;
1.254     schwarze 2431:                break;
                   2432:        case 'i':
1.261     schwarze 2433:                scaled = *res * 240;
1.254     schwarze 2434:                break;
                   2435:        case 'c':
1.261     schwarze 2436:                scaled = *res * 240 / 2.54;
1.254     schwarze 2437:                break;
                   2438:        case 'v':
                   2439:        case 'P':
1.261     schwarze 2440:                scaled = *res * 40;
1.254     schwarze 2441:                break;
                   2442:        case 'm':
                   2443:        case 'n':
1.261     schwarze 2444:                scaled = *res * 24;
1.254     schwarze 2445:                break;
                   2446:        case 'p':
1.261     schwarze 2447:                scaled = *res * 10 / 3;
1.254     schwarze 2448:                break;
                   2449:        case 'u':
1.261     schwarze 2450:                scaled = *res;
1.254     schwarze 2451:                break;
                   2452:        case 'M':
1.261     schwarze 2453:                scaled = *res * 6 / 25;
1.254     schwarze 2454:                break;
                   2455:        default:
1.261     schwarze 2456:                scaled = *res;
1.254     schwarze 2457:                p--;
                   2458:                break;
                   2459:        }
1.261     schwarze 2460:        if (flags & ROFFNUM_SCALE)
                   2461:                *res = scaled;
1.254     schwarze 2462:
                   2463:        *pos = p + 1;
1.277     schwarze 2464:        return 1;
1.184     schwarze 2465: }
                   2466:
1.198     schwarze 2467: /*
                   2468:  * Evaluate a string comparison condition.
                   2469:  * The first character is the delimiter.
                   2470:  * Succeed if the string up to its second occurrence
                   2471:  * matches the string up to its third occurence.
                   2472:  * Advance the cursor after the third occurrence
                   2473:  * or lacking that, to the end of the line.
                   2474:  */
                   2475: static int
                   2476: roff_evalstrcond(const char *v, int *pos)
                   2477: {
                   2478:        const char      *s1, *s2, *s3;
                   2479:        int              match;
                   2480:
                   2481:        match = 0;
                   2482:        s1 = v + *pos;          /* initial delimiter */
                   2483:        s2 = s1 + 1;            /* for scanning the first string */
                   2484:        s3 = strchr(s2, *s1);   /* for scanning the second string */
                   2485:
                   2486:        if (NULL == s3)         /* found no middle delimiter */
                   2487:                goto out;
                   2488:
                   2489:        while ('\0' != *++s3) {
                   2490:                if (*s2 != *s3) {  /* mismatch */
                   2491:                        s3 = strchr(s3, *s1);
                   2492:                        break;
                   2493:                }
                   2494:                if (*s3 == *s1) {  /* found the final delimiter */
                   2495:                        match = 1;
                   2496:                        break;
                   2497:                }
                   2498:                s2++;
                   2499:        }
                   2500:
                   2501: out:
                   2502:        if (NULL == s3)
                   2503:                s3 = strchr(s2, '\0');
1.242     schwarze 2504:        else if (*s3 != '\0')
1.198     schwarze 2505:                s3++;
                   2506:        *pos = s3 - v;
1.277     schwarze 2507:        return match;
1.198     schwarze 2508: }
                   2509:
1.204     schwarze 2510: /*
                   2511:  * Evaluate an optionally negated single character, numerical,
                   2512:  * or string condition.
                   2513:  */
1.198     schwarze 2514: static int
1.271     schwarze 2515: roff_evalcond(struct roff *r, int ln, char *v, int *pos)
1.88      kristaps 2516: {
1.336     schwarze 2517:        const char      *start, *end;
                   2518:        char            *cp, *name;
                   2519:        size_t           sz;
                   2520:        int              deftype, len, number, savepos, istrue, wanttrue;
1.88      kristaps 2521:
1.198     schwarze 2522:        if ('!' == v[*pos]) {
                   2523:                wanttrue = 0;
                   2524:                (*pos)++;
                   2525:        } else
                   2526:                wanttrue = 1;
                   2527:
1.88      kristaps 2528:        switch (v[*pos]) {
1.240     schwarze 2529:        case '\0':
1.277     schwarze 2530:                return 0;
1.207     schwarze 2531:        case 'n':
                   2532:        case 'o':
1.88      kristaps 2533:                (*pos)++;
1.277     schwarze 2534:                return wanttrue;
1.207     schwarze 2535:        case 'e':
                   2536:        case 't':
1.239     schwarze 2537:        case 'v':
1.88      kristaps 2538:                (*pos)++;
1.277     schwarze 2539:                return !wanttrue;
1.336     schwarze 2540:        case 'c':
                   2541:                do {
                   2542:                        (*pos)++;
                   2543:                } while (v[*pos] == ' ');
                   2544:
                   2545:                /*
                   2546:                 * Quirk for groff compatibility:
                   2547:                 * The horizontal tab is neither available nor unavailable.
                   2548:                 */
                   2549:
                   2550:                if (v[*pos] == '\t') {
                   2551:                        (*pos)++;
                   2552:                        return 0;
                   2553:                }
                   2554:
                   2555:                /* Printable ASCII characters are available. */
                   2556:
                   2557:                if (v[*pos] != '\\') {
                   2558:                        (*pos)++;
                   2559:                        return wanttrue;
                   2560:                }
                   2561:
                   2562:                end = v + ++*pos;
                   2563:                switch (mandoc_escape(&end, &start, &len)) {
                   2564:                case ESCAPE_SPECIAL:
                   2565:                        istrue = mchars_spec2cp(start, len) != -1;
                   2566:                        break;
                   2567:                case ESCAPE_UNICODE:
                   2568:                        istrue = 1;
                   2569:                        break;
                   2570:                case ESCAPE_NUMBERED:
                   2571:                        istrue = mchars_num2char(start, len) != -1;
                   2572:                        break;
                   2573:                default:
                   2574:                        istrue = !wanttrue;
                   2575:                        break;
                   2576:                }
                   2577:                *pos = end - v;
                   2578:                return istrue == wanttrue;
1.310     schwarze 2579:        case 'd':
1.271     schwarze 2580:        case 'r':
1.310     schwarze 2581:                cp = v + *pos + 1;
                   2582:                while (*cp == ' ')
                   2583:                        cp++;
                   2584:                name = cp;
                   2585:                sz = roff_getname(r, &cp, ln, cp - v);
1.315     schwarze 2586:                if (sz == 0)
                   2587:                        istrue = 0;
                   2588:                else if (v[*pos] == 'r')
                   2589:                        istrue = roff_hasregn(r, name, sz);
                   2590:                else {
                   2591:                        deftype = ROFFDEF_ANY;
                   2592:                        roff_getstrn(r, name, sz, &deftype);
                   2593:                        istrue = !!deftype;
                   2594:                }
1.363     schwarze 2595:                *pos = (name + sz) - v;
1.310     schwarze 2596:                return istrue == wanttrue;
1.88      kristaps 2597:        default:
                   2598:                break;
                   2599:        }
                   2600:
1.241     schwarze 2601:        savepos = *pos;
1.261     schwarze 2602:        if (roff_evalnum(r, ln, v, pos, &number, ROFFNUM_SCALE))
1.277     schwarze 2603:                return (number > 0) == wanttrue;
1.241     schwarze 2604:        else if (*pos == savepos)
1.277     schwarze 2605:                return roff_evalstrcond(v, pos) == wanttrue;
1.204     schwarze 2606:        else
1.277     schwarze 2607:                return 0;
1.88      kristaps 2608: }
                   2609:
1.340     schwarze 2610: static int
1.103     kristaps 2611: roff_line_ignore(ROFF_ARGS)
1.89      kristaps 2612: {
1.123     schwarze 2613:
1.277     schwarze 2614:        return ROFF_IGN;
1.89      kristaps 2615: }
                   2616:
1.340     schwarze 2617: static int
1.251     schwarze 2618: roff_insec(ROFF_ARGS)
                   2619: {
                   2620:
1.350     schwarze 2621:        mandoc_msg(MANDOCERR_REQ_INSEC, ln, ppos, "%s", roff_name[tok]);
1.277     schwarze 2622:        return ROFF_IGN;
1.251     schwarze 2623: }
                   2624:
1.340     schwarze 2625: static int
1.251     schwarze 2626: roff_unsupp(ROFF_ARGS)
                   2627: {
                   2628:
1.350     schwarze 2629:        mandoc_msg(MANDOCERR_REQ_UNSUPP, ln, ppos, "%s", roff_name[tok]);
1.277     schwarze 2630:        return ROFF_IGN;
1.251     schwarze 2631: }
                   2632:
1.340     schwarze 2633: static int
1.82      kristaps 2634: roff_cond(ROFF_ARGS)
1.74      kristaps 2635: {
1.340     schwarze 2636:        int      irc;
1.173     schwarze 2637:
                   2638:        roffnode_push(r, tok, NULL, ln, ppos);
1.74      kristaps 2639:
1.207     schwarze 2640:        /*
1.134     kristaps 2641:         * An `.el' has no conditional body: it will consume the value
                   2642:         * of the current rstack entry set in prior `ie' calls or
1.207     schwarze 2643:         * defaults to DENY.
1.134     kristaps 2644:         *
                   2645:         * If we're not an `el', however, then evaluate the conditional.
                   2646:         */
1.133     kristaps 2647:
1.238     schwarze 2648:        r->last->rule = tok == ROFF_el ?
1.207     schwarze 2649:            (r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) :
1.238     schwarze 2650:            roff_evalcond(r, ln, buf->buf, &pos);
1.77      kristaps 2651:
1.134     kristaps 2652:        /*
                   2653:         * An if-else will put the NEGATION of the current evaluated
                   2654:         * conditional into the stack of rules.
                   2655:         */
                   2656:
1.238     schwarze 2657:        if (tok == ROFF_ie) {
1.223     schwarze 2658:                if (r->rstackpos + 1 == r->rstacksz) {
                   2659:                        r->rstacksz += 16;
                   2660:                        r->rstack = mandoc_reallocarray(r->rstack,
                   2661:                            r->rstacksz, sizeof(int));
1.134     kristaps 2662:                }
1.198     schwarze 2663:                r->rstack[++r->rstackpos] = !r->last->rule;
1.82      kristaps 2664:        }
1.88      kristaps 2665:
                   2666:        /* If the parent has false as its rule, then so do we. */
                   2667:
1.198     schwarze 2668:        if (r->last->parent && !r->last->parent->rule)
                   2669:                r->last->rule = 0;
1.88      kristaps 2670:
                   2671:        /*
1.173     schwarze 2672:         * Determine scope.
                   2673:         * If there is nothing on the line after the conditional,
                   2674:         * not even whitespace, use next-line scope.
1.340     schwarze 2675:         * Except that .while does not support next-line scope.
1.88      kristaps 2676:         */
1.74      kristaps 2677:
1.340     schwarze 2678:        if (buf->buf[pos] == '\0' && tok != ROFF_while) {
1.173     schwarze 2679:                r->last->endspan = 2;
                   2680:                goto out;
                   2681:        }
                   2682:
1.238     schwarze 2683:        while (buf->buf[pos] == ' ')
1.173     schwarze 2684:                pos++;
                   2685:
                   2686:        /* An opening brace requests multiline scope. */
1.75      kristaps 2687:
1.238     schwarze 2688:        if (buf->buf[pos] == '\\' && buf->buf[pos + 1] == '{') {
1.75      kristaps 2689:                r->last->endspan = -1;
                   2690:                pos += 2;
1.272     schwarze 2691:                while (buf->buf[pos] == ' ')
                   2692:                        pos++;
1.173     schwarze 2693:                goto out;
1.207     schwarze 2694:        }
1.74      kristaps 2695:
1.77      kristaps 2696:        /*
1.173     schwarze 2697:         * Anything else following the conditional causes
                   2698:         * single-line scope.  Warn if the scope contains
                   2699:         * nothing but trailing whitespace.
1.77      kristaps 2700:         */
                   2701:
1.238     schwarze 2702:        if (buf->buf[pos] == '\0')
1.350     schwarze 2703:                mandoc_msg(MANDOCERR_COND_EMPTY,
                   2704:                    ln, ppos, "%s", roff_name[tok]);
1.77      kristaps 2705:
1.173     schwarze 2706:        r->last->endspan = 1;
1.74      kristaps 2707:
1.173     schwarze 2708: out:
1.75      kristaps 2709:        *offs = pos;
1.340     schwarze 2710:        irc = ROFF_RERUN;
                   2711:        if (tok == ROFF_while)
                   2712:                irc |= ROFF_WHILE;
                   2713:        return irc;
1.83      schwarze 2714: }
                   2715:
1.340     schwarze 2716: static int
1.92      schwarze 2717: roff_ds(ROFF_ARGS)
                   2718: {
1.212     schwarze 2719:        char            *string;
                   2720:        const char      *name;
                   2721:        size_t           namesz;
1.96      kristaps 2722:
1.251     schwarze 2723:        /* Ignore groff compatibility mode for now. */
                   2724:
                   2725:        if (tok == ROFF_ds1)
                   2726:                tok = ROFF_ds;
                   2727:        else if (tok == ROFF_as1)
                   2728:                tok = ROFF_as;
                   2729:
1.96      kristaps 2730:        /*
1.212     schwarze 2731:         * The first word is the name of the string.
                   2732:         * If it is empty or terminated by an escape sequence,
                   2733:         * abort the `ds' request without defining anything.
1.96      kristaps 2734:         */
1.92      schwarze 2735:
1.238     schwarze 2736:        name = string = buf->buf + pos;
                   2737:        if (*name == '\0')
1.277     schwarze 2738:                return ROFF_IGN;
1.92      schwarze 2739:
1.212     schwarze 2740:        namesz = roff_getname(r, &string, ln, pos);
1.363     schwarze 2741:        switch (name[namesz]) {
                   2742:        case '\\':
1.277     schwarze 2743:                return ROFF_IGN;
1.363     schwarze 2744:        case '\t':
                   2745:                string = buf->buf + pos + namesz;
                   2746:                break;
                   2747:        default:
                   2748:                break;
                   2749:        }
1.212     schwarze 2750:
                   2751:        /* Read past the initial double-quote, if any. */
1.238     schwarze 2752:        if (*string == '"')
1.92      schwarze 2753:                string++;
                   2754:
1.96      kristaps 2755:        /* The rest is the value. */
1.212     schwarze 2756:        roff_setstrn(&r->strtab, name, namesz, string, strlen(string),
                   2757:            ROFF_as == tok);
1.311     schwarze 2758:        roff_setstrn(&r->rentab, name, namesz, NULL, 0, 0);
1.277     schwarze 2759:        return ROFF_IGN;
1.92      schwarze 2760: }
                   2761:
1.204     schwarze 2762: /*
                   2763:  * Parse a single operator, one or two characters long.
                   2764:  * If the operator is recognized, return success and advance the
                   2765:  * parse point, else return failure and let the parse point unchanged.
                   2766:  */
                   2767: static int
                   2768: roff_getop(const char *v, int *pos, char *res)
                   2769: {
                   2770:
                   2771:        *res = v[*pos];
                   2772:
                   2773:        switch (*res) {
1.207     schwarze 2774:        case '+':
                   2775:        case '-':
                   2776:        case '*':
                   2777:        case '/':
                   2778:        case '%':
                   2779:        case '&':
                   2780:        case ':':
1.204     schwarze 2781:                break;
                   2782:        case '<':
                   2783:                switch (v[*pos + 1]) {
1.207     schwarze 2784:                case '=':
1.204     schwarze 2785:                        *res = 'l';
                   2786:                        (*pos)++;
                   2787:                        break;
1.207     schwarze 2788:                case '>':
1.204     schwarze 2789:                        *res = '!';
                   2790:                        (*pos)++;
                   2791:                        break;
1.207     schwarze 2792:                case '?':
1.204     schwarze 2793:                        *res = 'i';
                   2794:                        (*pos)++;
                   2795:                        break;
                   2796:                default:
                   2797:                        break;
                   2798:                }
                   2799:                break;
                   2800:        case '>':
                   2801:                switch (v[*pos + 1]) {
1.207     schwarze 2802:                case '=':
1.204     schwarze 2803:                        *res = 'g';
                   2804:                        (*pos)++;
                   2805:                        break;
1.207     schwarze 2806:                case '?':
1.204     schwarze 2807:                        *res = 'a';
                   2808:                        (*pos)++;
                   2809:                        break;
                   2810:                default:
                   2811:                        break;
                   2812:                }
                   2813:                break;
                   2814:        case '=':
                   2815:                if ('=' == v[*pos + 1])
                   2816:                        (*pos)++;
                   2817:                break;
                   2818:        default:
1.277     schwarze 2819:                return 0;
1.204     schwarze 2820:        }
                   2821:        (*pos)++;
                   2822:
1.277     schwarze 2823:        return *res;
1.204     schwarze 2824: }
                   2825:
                   2826: /*
                   2827:  * Evaluate either a parenthesized numeric expression
                   2828:  * or a single signed integer number.
                   2829:  */
                   2830: static int
1.235     schwarze 2831: roff_evalpar(struct roff *r, int ln,
1.261     schwarze 2832:        const char *v, int *pos, int *res, int flags)
1.204     schwarze 2833: {
                   2834:
                   2835:        if ('(' != v[*pos])
1.277     schwarze 2836:                return roff_getnum(v, pos, res, flags);
1.204     schwarze 2837:
                   2838:        (*pos)++;
1.261     schwarze 2839:        if ( ! roff_evalnum(r, ln, v, pos, res, flags | ROFFNUM_WHITE))
1.277     schwarze 2840:                return 0;
1.204     schwarze 2841:
1.206     schwarze 2842:        /*
                   2843:         * Omission of the closing parenthesis
                   2844:         * is an error in validation mode,
                   2845:         * but ignored in evaluation mode.
                   2846:         */
                   2847:
1.204     schwarze 2848:        if (')' == v[*pos])
                   2849:                (*pos)++;
1.206     schwarze 2850:        else if (NULL == res)
1.277     schwarze 2851:                return 0;
1.204     schwarze 2852:
1.277     schwarze 2853:        return 1;
1.204     schwarze 2854: }
                   2855:
                   2856: /*
                   2857:  * Evaluate a complete numeric expression.
                   2858:  * Proceed left to right, there is no concept of precedence.
                   2859:  */
                   2860: static int
1.235     schwarze 2861: roff_evalnum(struct roff *r, int ln, const char *v,
1.261     schwarze 2862:        int *pos, int *res, int flags)
1.204     schwarze 2863: {
                   2864:        int              mypos, operand2;
                   2865:        char             operator;
                   2866:
                   2867:        if (NULL == pos) {
                   2868:                mypos = 0;
                   2869:                pos = &mypos;
                   2870:        }
                   2871:
1.261     schwarze 2872:        if (flags & ROFFNUM_WHITE)
1.204     schwarze 2873:                while (isspace((unsigned char)v[*pos]))
                   2874:                        (*pos)++;
                   2875:
1.261     schwarze 2876:        if ( ! roff_evalpar(r, ln, v, pos, res, flags))
1.277     schwarze 2877:                return 0;
1.204     schwarze 2878:
                   2879:        while (1) {
1.261     schwarze 2880:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2881:                        while (isspace((unsigned char)v[*pos]))
                   2882:                                (*pos)++;
                   2883:
                   2884:                if ( ! roff_getop(v, pos, &operator))
                   2885:                        break;
                   2886:
1.261     schwarze 2887:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2888:                        while (isspace((unsigned char)v[*pos]))
                   2889:                                (*pos)++;
                   2890:
1.261     schwarze 2891:                if ( ! roff_evalpar(r, ln, v, pos, &operand2, flags))
1.277     schwarze 2892:                        return 0;
1.204     schwarze 2893:
1.261     schwarze 2894:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2895:                        while (isspace((unsigned char)v[*pos]))
                   2896:                                (*pos)++;
1.206     schwarze 2897:
                   2898:                if (NULL == res)
                   2899:                        continue;
1.204     schwarze 2900:
                   2901:                switch (operator) {
1.207     schwarze 2902:                case '+':
1.204     schwarze 2903:                        *res += operand2;
                   2904:                        break;
1.207     schwarze 2905:                case '-':
1.204     schwarze 2906:                        *res -= operand2;
                   2907:                        break;
1.207     schwarze 2908:                case '*':
1.204     schwarze 2909:                        *res *= operand2;
                   2910:                        break;
1.207     schwarze 2911:                case '/':
1.244     schwarze 2912:                        if (operand2 == 0) {
1.235     schwarze 2913:                                mandoc_msg(MANDOCERR_DIVZERO,
1.350     schwarze 2914:                                        ln, *pos, "%s", v);
1.234     kristaps 2915:                                *res = 0;
                   2916:                                break;
                   2917:                        }
1.204     schwarze 2918:                        *res /= operand2;
                   2919:                        break;
1.207     schwarze 2920:                case '%':
1.244     schwarze 2921:                        if (operand2 == 0) {
                   2922:                                mandoc_msg(MANDOCERR_DIVZERO,
1.350     schwarze 2923:                                        ln, *pos, "%s", v);
1.244     schwarze 2924:                                *res = 0;
                   2925:                                break;
                   2926:                        }
1.204     schwarze 2927:                        *res %= operand2;
                   2928:                        break;
1.207     schwarze 2929:                case '<':
1.204     schwarze 2930:                        *res = *res < operand2;
                   2931:                        break;
1.207     schwarze 2932:                case '>':
1.204     schwarze 2933:                        *res = *res > operand2;
                   2934:                        break;
1.207     schwarze 2935:                case 'l':
1.204     schwarze 2936:                        *res = *res <= operand2;
                   2937:                        break;
1.207     schwarze 2938:                case 'g':
1.204     schwarze 2939:                        *res = *res >= operand2;
                   2940:                        break;
1.207     schwarze 2941:                case '=':
1.204     schwarze 2942:                        *res = *res == operand2;
                   2943:                        break;
1.207     schwarze 2944:                case '!':
1.204     schwarze 2945:                        *res = *res != operand2;
                   2946:                        break;
1.207     schwarze 2947:                case '&':
1.204     schwarze 2948:                        *res = *res && operand2;
                   2949:                        break;
1.207     schwarze 2950:                case ':':
1.204     schwarze 2951:                        *res = *res || operand2;
                   2952:                        break;
1.207     schwarze 2953:                case 'i':
1.204     schwarze 2954:                        if (operand2 < *res)
                   2955:                                *res = operand2;
                   2956:                        break;
1.207     schwarze 2957:                case 'a':
1.204     schwarze 2958:                        if (operand2 > *res)
                   2959:                                *res = operand2;
                   2960:                        break;
                   2961:                default:
                   2962:                        abort();
                   2963:                }
                   2964:        }
1.277     schwarze 2965:        return 1;
1.204     schwarze 2966: }
                   2967:
1.266     schwarze 2968: /* --- register management ------------------------------------------------ */
                   2969:
1.180     schwarze 2970: void
1.187     schwarze 2971: roff_setreg(struct roff *r, const char *name, int val, char sign)
1.147     kristaps 2972: {
1.327     schwarze 2973:        roff_setregn(r, name, strlen(name), val, sign, INT_MIN);
1.326     schwarze 2974: }
                   2975:
                   2976: static void
                   2977: roff_setregn(struct roff *r, const char *name, size_t len,
1.327     schwarze 2978:     int val, char sign, int step)
1.326     schwarze 2979: {
1.180     schwarze 2980:        struct roffreg  *reg;
                   2981:
                   2982:        /* Search for an existing register with the same name. */
                   2983:        reg = r->regtab;
                   2984:
1.326     schwarze 2985:        while (reg != NULL && (reg->key.sz != len ||
                   2986:            strncmp(reg->key.p, name, len) != 0))
1.180     schwarze 2987:                reg = reg->next;
1.147     kristaps 2988:
1.180     schwarze 2989:        if (NULL == reg) {
                   2990:                /* Create a new register. */
                   2991:                reg = mandoc_malloc(sizeof(struct roffreg));
1.326     schwarze 2992:                reg->key.p = mandoc_strndup(name, len);
                   2993:                reg->key.sz = len;
1.187     schwarze 2994:                reg->val = 0;
1.327     schwarze 2995:                reg->step = 0;
1.180     schwarze 2996:                reg->next = r->regtab;
                   2997:                r->regtab = reg;
                   2998:        }
                   2999:
1.187     schwarze 3000:        if ('+' == sign)
                   3001:                reg->val += val;
                   3002:        else if ('-' == sign)
                   3003:                reg->val -= val;
                   3004:        else
                   3005:                reg->val = val;
1.327     schwarze 3006:        if (step != INT_MIN)
                   3007:                reg->step = step;
1.147     kristaps 3008: }
                   3009:
1.192     schwarze 3010: /*
                   3011:  * Handle some predefined read-only number registers.
                   3012:  * For now, return -1 if the requested register is not predefined;
                   3013:  * in case a predefined read-only register having the value -1
                   3014:  * were to turn up, another special value would have to be chosen.
                   3015:  */
                   3016: static int
1.273     schwarze 3017: roff_getregro(const struct roff *r, const char *name)
1.192     schwarze 3018: {
                   3019:
                   3020:        switch (*name) {
1.273     schwarze 3021:        case '$':  /* Number of arguments of the last macro evaluated. */
1.339     schwarze 3022:                return r->mstackpos < 0 ? 0 : r->mstack[r->mstackpos].argc;
1.207     schwarze 3023:        case 'A':  /* ASCII approximation mode is always off. */
1.277     schwarze 3024:                return 0;
1.207     schwarze 3025:        case 'g':  /* Groff compatibility mode is always on. */
1.277     schwarze 3026:                return 1;
1.207     schwarze 3027:        case 'H':  /* Fixed horizontal resolution. */
1.277     schwarze 3028:                return 24;
1.207     schwarze 3029:        case 'j':  /* Always adjust left margin only. */
1.277     schwarze 3030:                return 0;
1.207     schwarze 3031:        case 'T':  /* Some output device is always defined. */
1.277     schwarze 3032:                return 1;
1.207     schwarze 3033:        case 'V':  /* Fixed vertical resolution. */
1.277     schwarze 3034:                return 40;
1.192     schwarze 3035:        default:
1.277     schwarze 3036:                return -1;
1.192     schwarze 3037:        }
                   3038: }
                   3039:
1.181     schwarze 3040: int
1.326     schwarze 3041: roff_getreg(struct roff *r, const char *name)
1.147     kristaps 3042: {
1.327     schwarze 3043:        return roff_getregn(r, name, strlen(name), '\0');
1.181     schwarze 3044: }
                   3045:
                   3046: static int
1.327     schwarze 3047: roff_getregn(struct roff *r, const char *name, size_t len, char sign)
1.181     schwarze 3048: {
                   3049:        struct roffreg  *reg;
1.192     schwarze 3050:        int              val;
                   3051:
                   3052:        if ('.' == name[0] && 2 == len) {
1.273     schwarze 3053:                val = roff_getregro(r, name + 1);
1.192     schwarze 3054:                if (-1 != val)
1.277     schwarze 3055:                        return val;
1.192     schwarze 3056:        }
1.181     schwarze 3057:
1.327     schwarze 3058:        for (reg = r->regtab; reg; reg = reg->next) {
1.181     schwarze 3059:                if (len == reg->key.sz &&
1.327     schwarze 3060:                    0 == strncmp(name, reg->key.p, len)) {
                   3061:                        switch (sign) {
                   3062:                        case '+':
                   3063:                                reg->val += reg->step;
                   3064:                                break;
                   3065:                        case '-':
                   3066:                                reg->val -= reg->step;
                   3067:                                break;
                   3068:                        default:
                   3069:                                break;
                   3070:                        }
1.277     schwarze 3071:                        return reg->val;
1.327     schwarze 3072:                }
                   3073:        }
1.271     schwarze 3074:
1.327     schwarze 3075:        roff_setregn(r, name, len, 0, '\0', INT_MIN);
1.277     schwarze 3076:        return 0;
1.271     schwarze 3077: }
                   3078:
                   3079: static int
                   3080: roff_hasregn(const struct roff *r, const char *name, size_t len)
                   3081: {
                   3082:        struct roffreg  *reg;
                   3083:        int              val;
                   3084:
                   3085:        if ('.' == name[0] && 2 == len) {
1.273     schwarze 3086:                val = roff_getregro(r, name + 1);
1.271     schwarze 3087:                if (-1 != val)
1.277     schwarze 3088:                        return 1;
1.271     schwarze 3089:        }
                   3090:
                   3091:        for (reg = r->regtab; reg; reg = reg->next)
                   3092:                if (len == reg->key.sz &&
                   3093:                    0 == strncmp(name, reg->key.p, len))
1.277     schwarze 3094:                        return 1;
1.147     kristaps 3095:
1.277     schwarze 3096:        return 0;
1.147     kristaps 3097: }
                   3098:
1.180     schwarze 3099: static void
                   3100: roff_freereg(struct roffreg *reg)
1.147     kristaps 3101: {
1.180     schwarze 3102:        struct roffreg  *old_reg;
1.147     kristaps 3103:
1.180     schwarze 3104:        while (NULL != reg) {
                   3105:                free(reg->key.p);
                   3106:                old_reg = reg;
                   3107:                reg = reg->next;
                   3108:                free(old_reg);
                   3109:        }
1.147     kristaps 3110: }
1.92      schwarze 3111:
1.340     schwarze 3112: static int
1.89      kristaps 3113: roff_nr(ROFF_ARGS)
1.83      schwarze 3114: {
1.327     schwarze 3115:        char            *key, *val, *step;
1.212     schwarze 3116:        size_t           keysz;
1.327     schwarze 3117:        int              iv, is, len;
1.187     schwarze 3118:        char             sign;
1.89      kristaps 3119:
1.238     schwarze 3120:        key = val = buf->buf + pos;
                   3121:        if (*key == '\0')
1.277     schwarze 3122:                return ROFF_IGN;
1.212     schwarze 3123:
                   3124:        keysz = roff_getname(r, &val, ln, pos);
1.363     schwarze 3125:        if (key[keysz] == '\\' || key[keysz] == '\t')
1.277     schwarze 3126:                return ROFF_IGN;
1.89      kristaps 3127:
1.187     schwarze 3128:        sign = *val;
1.238     schwarze 3129:        if (sign == '+' || sign == '-')
1.187     schwarze 3130:                val++;
                   3131:
1.327     schwarze 3132:        len = 0;
                   3133:        if (roff_evalnum(r, ln, val, &len, &iv, ROFFNUM_SCALE) == 0)
                   3134:                return ROFF_IGN;
                   3135:
                   3136:        step = val + len;
                   3137:        while (isspace((unsigned char)*step))
                   3138:                step++;
                   3139:        if (roff_evalnum(r, ln, step, NULL, &is, 0) == 0)
                   3140:                is = INT_MIN;
1.109     kristaps 3141:
1.327     schwarze 3142:        roff_setregn(r, key, keysz, iv, sign, is);
1.277     schwarze 3143:        return ROFF_IGN;
1.203     schwarze 3144: }
                   3145:
1.340     schwarze 3146: static int
1.203     schwarze 3147: roff_rr(ROFF_ARGS)
                   3148: {
                   3149:        struct roffreg  *reg, **prev;
1.212     schwarze 3150:        char            *name, *cp;
                   3151:        size_t           namesz;
1.203     schwarze 3152:
1.238     schwarze 3153:        name = cp = buf->buf + pos;
                   3154:        if (*name == '\0')
1.277     schwarze 3155:                return ROFF_IGN;
1.212     schwarze 3156:        namesz = roff_getname(r, &cp, ln, pos);
                   3157:        name[namesz] = '\0';
1.203     schwarze 3158:
                   3159:        prev = &r->regtab;
                   3160:        while (1) {
                   3161:                reg = *prev;
1.238     schwarze 3162:                if (reg == NULL || !strcmp(name, reg->key.p))
1.203     schwarze 3163:                        break;
                   3164:                prev = &reg->next;
                   3165:        }
1.238     schwarze 3166:        if (reg != NULL) {
1.203     schwarze 3167:                *prev = reg->next;
                   3168:                free(reg->key.p);
                   3169:                free(reg);
                   3170:        }
1.277     schwarze 3171:        return ROFF_IGN;
1.122     schwarze 3172: }
                   3173:
1.266     schwarze 3174: /* --- handler functions for roff requests -------------------------------- */
                   3175:
1.340     schwarze 3176: static int
1.122     schwarze 3177: roff_rm(ROFF_ARGS)
                   3178: {
                   3179:        const char       *name;
                   3180:        char             *cp;
1.212     schwarze 3181:        size_t            namesz;
1.122     schwarze 3182:
1.238     schwarze 3183:        cp = buf->buf + pos;
                   3184:        while (*cp != '\0') {
1.212     schwarze 3185:                name = cp;
1.238     schwarze 3186:                namesz = roff_getname(r, &cp, ln, (int)(cp - buf->buf));
1.212     schwarze 3187:                roff_setstrn(&r->strtab, name, namesz, NULL, 0, 0);
1.311     schwarze 3188:                roff_setstrn(&r->rentab, name, namesz, NULL, 0, 0);
1.363     schwarze 3189:                if (name[namesz] == '\\' || name[namesz] == '\t')
1.212     schwarze 3190:                        break;
1.122     schwarze 3191:        }
1.277     schwarze 3192:        return ROFF_IGN;
1.178     schwarze 3193: }
                   3194:
1.340     schwarze 3195: static int
1.178     schwarze 3196: roff_it(ROFF_ARGS)
                   3197: {
                   3198:        int              iv;
                   3199:
                   3200:        /* Parse the number of lines. */
1.261     schwarze 3201:
                   3202:        if ( ! roff_evalnum(r, ln, buf->buf, &pos, &iv, 0)) {
1.350     schwarze 3203:                mandoc_msg(MANDOCERR_IT_NONUM,
                   3204:                    ln, ppos, "%s", buf->buf + 1);
1.277     schwarze 3205:                return ROFF_IGN;
1.178     schwarze 3206:        }
                   3207:
1.262     schwarze 3208:        while (isspace((unsigned char)buf->buf[pos]))
                   3209:                pos++;
                   3210:
                   3211:        /*
                   3212:         * Arm the input line trap.
                   3213:         * Special-casing "an-trap" is an ugly workaround to cope
                   3214:         * with DocBook stupidly fiddling with man(7) internals.
                   3215:         */
1.261     schwarze 3216:
1.178     schwarze 3217:        roffit_lines = iv;
1.262     schwarze 3218:        roffit_macro = mandoc_strdup(iv != 1 ||
                   3219:            strcmp(buf->buf + pos, "an-trap") ?
                   3220:            buf->buf + pos : "br");
1.277     schwarze 3221:        return ROFF_IGN;
1.175     schwarze 3222: }
                   3223:
1.340     schwarze 3224: static int
1.175     schwarze 3225: roff_Dd(ROFF_ARGS)
                   3226: {
1.315     schwarze 3227:        int              mask;
                   3228:        enum roff_tok    t, te;
1.227     schwarze 3229:
1.315     schwarze 3230:        switch (tok) {
                   3231:        case ROFF_Dd:
                   3232:                tok = MDOC_Dd;
                   3233:                te = MDOC_MAX;
                   3234:                if (r->format == 0)
                   3235:                        r->format = MPARSE_MDOC;
                   3236:                mask = MPARSE_MDOC | MPARSE_QUICK;
                   3237:                break;
                   3238:        case ROFF_TH:
                   3239:                tok = MAN_TH;
                   3240:                te = MAN_MAX;
                   3241:                if (r->format == 0)
                   3242:                        r->format = MPARSE_MAN;
                   3243:                mask = MPARSE_QUICK;
                   3244:                break;
                   3245:        default:
                   3246:                abort();
                   3247:        }
                   3248:        if ((r->options & mask) == 0)
                   3249:                for (t = tok; t < te; t++)
                   3250:                        roff_setstr(r, roff_name[t], NULL, 0);
1.277     schwarze 3251:        return ROFF_CONT;
1.109     kristaps 3252: }
                   3253:
1.340     schwarze 3254: static int
1.109     kristaps 3255: roff_TE(ROFF_ARGS)
                   3256: {
1.361     schwarze 3257:        r->man->flags &= ~ROFF_NONOFILL;
1.321     schwarze 3258:        if (r->tbl == NULL) {
1.350     schwarze 3259:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, ln, ppos, "TE");
1.321     schwarze 3260:                return ROFF_IGN;
                   3261:        }
1.346     schwarze 3262:        if (tbl_end(r->tbl, 0) == 0) {
1.321     schwarze 3263:                r->tbl = NULL;
1.258     schwarze 3264:                free(buf->buf);
                   3265:                buf->buf = mandoc_strdup(".sp");
                   3266:                buf->sz = 4;
1.329     schwarze 3267:                *offs = 0;
1.277     schwarze 3268:                return ROFF_REPARSE;
1.258     schwarze 3269:        }
1.321     schwarze 3270:        r->tbl = NULL;
1.277     schwarze 3271:        return ROFF_IGN;
1.112     kristaps 3272: }
                   3273:
1.340     schwarze 3274: static int
1.112     kristaps 3275: roff_T_(ROFF_ARGS)
                   3276: {
                   3277:
                   3278:        if (NULL == r->tbl)
1.350     schwarze 3279:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, ln, ppos, "T&");
1.112     kristaps 3280:        else
1.296     schwarze 3281:                tbl_restart(ln, ppos, r->tbl);
1.112     kristaps 3282:
1.277     schwarze 3283:        return ROFF_IGN;
1.109     kristaps 3284: }
                   3285:
1.230     schwarze 3286: /*
                   3287:  * Handle in-line equation delimiters.
                   3288:  */
1.340     schwarze 3289: static int
1.238     schwarze 3290: roff_eqndelim(struct roff *r, struct buf *buf, int pos)
1.151     kristaps 3291: {
1.233     schwarze 3292:        char            *cp1, *cp2;
                   3293:        const char      *bef_pr, *bef_nl, *mac, *aft_nl, *aft_pr;
1.151     kristaps 3294:
1.230     schwarze 3295:        /*
                   3296:         * Outside equations, look for an opening delimiter.
                   3297:         * If we are inside an equation, we already know it is
                   3298:         * in-line, or this function wouldn't have been called;
                   3299:         * so look for a closing delimiter.
                   3300:         */
                   3301:
1.238     schwarze 3302:        cp1 = buf->buf + pos;
1.230     schwarze 3303:        cp2 = strchr(cp1, r->eqn == NULL ?
                   3304:            r->last_eqn->odelim : r->last_eqn->cdelim);
                   3305:        if (cp2 == NULL)
1.277     schwarze 3306:                return ROFF_CONT;
1.230     schwarze 3307:
1.233     schwarze 3308:        *cp2++ = '\0';
                   3309:        bef_pr = bef_nl = aft_nl = aft_pr = "";
                   3310:
                   3311:        /* Handle preceding text, protecting whitespace. */
                   3312:
1.238     schwarze 3313:        if (*buf->buf != '\0') {
1.233     schwarze 3314:                if (r->eqn == NULL)
                   3315:                        bef_pr = "\\&";
                   3316:                bef_nl = "\n";
                   3317:        }
                   3318:
                   3319:        /*
                   3320:         * Prepare replacing the delimiter with an equation macro
                   3321:         * and drop leading white space from the equation.
                   3322:         */
1.230     schwarze 3323:
1.233     schwarze 3324:        if (r->eqn == NULL) {
                   3325:                while (*cp2 == ' ')
                   3326:                        cp2++;
                   3327:                mac = ".EQ";
                   3328:        } else
                   3329:                mac = ".EN";
                   3330:
                   3331:        /* Handle following text, protecting whitespace. */
                   3332:
                   3333:        if (*cp2 != '\0') {
                   3334:                aft_nl = "\n";
                   3335:                if (r->eqn != NULL)
                   3336:                        aft_pr = "\\&";
                   3337:        }
                   3338:
                   3339:        /* Do the actual replacement. */
                   3340:
1.238     schwarze 3341:        buf->sz = mandoc_asprintf(&cp1, "%s%s%s%s%s%s%s", buf->buf,
1.233     schwarze 3342:            bef_pr, bef_nl, mac, aft_nl, aft_pr, cp2) + 1;
1.238     schwarze 3343:        free(buf->buf);
                   3344:        buf->buf = cp1;
1.230     schwarze 3345:
                   3346:        /* Toggle the in-line state of the eqn subsystem. */
                   3347:
                   3348:        r->eqn_inline = r->eqn == NULL;
1.277     schwarze 3349:        return ROFF_REPARSE;
1.151     kristaps 3350: }
                   3351:
1.340     schwarze 3352: static int
1.235     schwarze 3353: roff_EQ(ROFF_ARGS)
1.125     kristaps 3354: {
1.319     schwarze 3355:        struct roff_node        *n;
                   3356:
1.356     schwarze 3357:        if (r->man->meta.macroset == MACROSET_MAN)
1.322     schwarze 3358:                man_breakscope(r->man, ROFF_EQ);
1.319     schwarze 3359:        n = roff_node_alloc(r->man, ln, ppos, ROFFT_EQN, TOKEN_NONE);
                   3360:        if (ln > r->man->last->line)
                   3361:                n->flags |= NODE_LINE;
1.348     schwarze 3362:        n->eqn = eqn_box_new();
1.319     schwarze 3363:        roff_node_append(r->man, n);
                   3364:        r->man->next = ROFF_NEXT_SIBLING;
1.125     kristaps 3365:
1.238     schwarze 3366:        assert(r->eqn == NULL);
1.319     schwarze 3367:        if (r->last_eqn == NULL)
1.351     schwarze 3368:                r->last_eqn = eqn_alloc();
1.319     schwarze 3369:        else
                   3370:                eqn_reset(r->last_eqn);
                   3371:        r->eqn = r->last_eqn;
                   3372:        r->eqn->node = n;
1.151     kristaps 3373:
1.238     schwarze 3374:        if (buf->buf[pos] != '\0')
1.350     schwarze 3375:                mandoc_msg(MANDOCERR_ARG_SKIP, ln, pos,
1.238     schwarze 3376:                    ".EQ %s", buf->buf + pos);
1.151     kristaps 3377:
1.277     schwarze 3378:        return ROFF_IGN;
1.125     kristaps 3379: }
                   3380:
1.340     schwarze 3381: static int
1.125     kristaps 3382: roff_EN(ROFF_ARGS)
                   3383: {
1.319     schwarze 3384:        if (r->eqn != NULL) {
                   3385:                eqn_parse(r->eqn);
                   3386:                r->eqn = NULL;
                   3387:        } else
1.350     schwarze 3388:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, ln, ppos, "EN");
1.319     schwarze 3389:        if (buf->buf[pos] != '\0')
1.350     schwarze 3390:                mandoc_msg(MANDOCERR_ARG_SKIP, ln, pos,
1.319     schwarze 3391:                    "EN %s", buf->buf + pos);
1.277     schwarze 3392:        return ROFF_IGN;
1.125     kristaps 3393: }
                   3394:
1.340     schwarze 3395: static int
1.109     kristaps 3396: roff_TS(ROFF_ARGS)
                   3397: {
1.321     schwarze 3398:        if (r->tbl != NULL) {
1.350     schwarze 3399:                mandoc_msg(MANDOCERR_BLK_BROKEN, ln, ppos, "TS breaks TS");
1.346     schwarze 3400:                tbl_end(r->tbl, 0);
1.115     kristaps 3401:        }
1.361     schwarze 3402:        r->man->flags |= ROFF_NONOFILL;
1.351     schwarze 3403:        r->tbl = tbl_alloc(ppos, ln, r->last_tbl);
1.346     schwarze 3404:        if (r->last_tbl == NULL)
1.321     schwarze 3405:                r->first_tbl = r->tbl;
                   3406:        r->last_tbl = r->tbl;
1.297     schwarze 3407:        return ROFF_IGN;
                   3408: }
                   3409:
1.340     schwarze 3410: static int
1.358     schwarze 3411: roff_noarg(ROFF_ARGS)
                   3412: {
                   3413:        if (r->man->flags & (MAN_BLINE | MAN_ELINE))
                   3414:                man_breakscope(r->man, tok);
                   3415:        if (tok == ROFF_brp)
                   3416:                tok = ROFF_br;
                   3417:        roff_elem_alloc(r->man, ln, ppos, tok);
                   3418:        if (buf->buf[pos] != '\0')
                   3419:                mandoc_msg(MANDOCERR_ARG_SKIP, ln, pos,
                   3420:                   "%s %s", roff_name[tok], buf->buf + pos);
                   3421:        if (tok == ROFF_nf)
                   3422:                r->man->flags |= ROFF_NOFILL;
                   3423:        else if (tok == ROFF_fi)
                   3424:                r->man->flags &= ~ROFF_NOFILL;
                   3425:        r->man->last->flags |= NODE_LINE | NODE_VALID | NODE_ENDED;
                   3426:        r->man->next = ROFF_NEXT_SIBLING;
                   3427:        return ROFF_IGN;
                   3428: }
                   3429:
                   3430: static int
1.297     schwarze 3431: roff_onearg(ROFF_ARGS)
                   3432: {
                   3433:        struct roff_node        *n;
                   3434:        char                    *cp;
1.305     schwarze 3435:        int                      npos;
1.297     schwarze 3436:
1.302     schwarze 3437:        if (r->man->flags & (MAN_BLINE | MAN_ELINE) &&
1.320     schwarze 3438:            (tok == ROFF_ce || tok == ROFF_rj || tok == ROFF_sp ||
                   3439:             tok == ROFF_ti))
1.302     schwarze 3440:                man_breakscope(r->man, tok);
                   3441:
1.309     schwarze 3442:        if (roffce_node != NULL && (tok == ROFF_ce || tok == ROFF_rj)) {
1.305     schwarze 3443:                r->man->last = roffce_node;
                   3444:                r->man->next = ROFF_NEXT_SIBLING;
                   3445:        }
                   3446:
1.297     schwarze 3447:        roff_elem_alloc(r->man, ln, ppos, tok);
                   3448:        n = r->man->last;
                   3449:
                   3450:        cp = buf->buf + pos;
                   3451:        if (*cp != '\0') {
                   3452:                while (*cp != '\0' && *cp != ' ')
                   3453:                        cp++;
                   3454:                while (*cp == ' ')
                   3455:                        *cp++ = '\0';
                   3456:                if (*cp != '\0')
1.350     schwarze 3457:                        mandoc_msg(MANDOCERR_ARG_EXCESS,
                   3458:                            ln, (int)(cp - buf->buf),
1.297     schwarze 3459:                            "%s ... %s", roff_name[tok], cp);
                   3460:                roff_word_alloc(r->man, ln, pos, buf->buf + pos);
1.300     schwarze 3461:        }
                   3462:
1.309     schwarze 3463:        if (tok == ROFF_ce || tok == ROFF_rj) {
                   3464:                if (r->man->last->type == ROFFT_ELEM) {
1.305     schwarze 3465:                        roff_word_alloc(r->man, ln, pos, "1");
                   3466:                        r->man->last->flags |= NODE_NOSRC;
                   3467:                }
                   3468:                npos = 0;
                   3469:                if (roff_evalnum(r, ln, r->man->last->string, &npos,
                   3470:                    &roffce_lines, 0) == 0) {
1.350     schwarze 3471:                        mandoc_msg(MANDOCERR_CE_NONUM,
                   3472:                            ln, pos, "ce %s", buf->buf + pos);
1.305     schwarze 3473:                        roffce_lines = 1;
                   3474:                }
                   3475:                if (roffce_lines < 1) {
                   3476:                        r->man->last = r->man->last->parent;
                   3477:                        roffce_node = NULL;
                   3478:                        roffce_lines = 0;
                   3479:                } else
                   3480:                        roffce_node = r->man->last->parent;
                   3481:        } else {
                   3482:                n->flags |= NODE_VALID | NODE_ENDED;
                   3483:                r->man->last = n;
                   3484:        }
                   3485:        n->flags |= NODE_LINE;
1.300     schwarze 3486:        r->man->next = ROFF_NEXT_SIBLING;
                   3487:        return ROFF_IGN;
                   3488: }
                   3489:
1.340     schwarze 3490: static int
1.300     schwarze 3491: roff_manyarg(ROFF_ARGS)
                   3492: {
                   3493:        struct roff_node        *n;
                   3494:        char                    *sp, *ep;
                   3495:
                   3496:        roff_elem_alloc(r->man, ln, ppos, tok);
                   3497:        n = r->man->last;
                   3498:
                   3499:        for (sp = ep = buf->buf + pos; *sp != '\0'; sp = ep) {
                   3500:                while (*ep != '\0' && *ep != ' ')
                   3501:                        ep++;
                   3502:                while (*ep == ' ')
                   3503:                        *ep++ = '\0';
                   3504:                roff_word_alloc(r->man, ln, sp - buf->buf, sp);
1.297     schwarze 3505:        }
                   3506:
                   3507:        n->flags |= NODE_LINE | NODE_VALID | NODE_ENDED;
                   3508:        r->man->last = n;
                   3509:        r->man->next = ROFF_NEXT_SIBLING;
1.277     schwarze 3510:        return ROFF_IGN;
1.251     schwarze 3511: }
                   3512:
1.340     schwarze 3513: static int
1.311     schwarze 3514: roff_als(ROFF_ARGS)
                   3515: {
                   3516:        char            *oldn, *newn, *end, *value;
                   3517:        size_t           oldsz, newsz, valsz;
                   3518:
                   3519:        newn = oldn = buf->buf + pos;
                   3520:        if (*newn == '\0')
                   3521:                return ROFF_IGN;
                   3522:
                   3523:        newsz = roff_getname(r, &oldn, ln, pos);
1.363     schwarze 3524:        if (newn[newsz] == '\\' || newn[newsz] == '\t' || *oldn == '\0')
1.311     schwarze 3525:                return ROFF_IGN;
                   3526:
                   3527:        end = oldn;
                   3528:        oldsz = roff_getname(r, &end, ln, oldn - buf->buf);
                   3529:        if (oldsz == 0)
                   3530:                return ROFF_IGN;
                   3531:
1.338     schwarze 3532:        valsz = mandoc_asprintf(&value, ".%.*s \\$@\\\"\n",
1.315     schwarze 3533:            (int)oldsz, oldn);
1.311     schwarze 3534:        roff_setstrn(&r->strtab, newn, newsz, value, valsz, 0);
                   3535:        roff_setstrn(&r->rentab, newn, newsz, NULL, 0, 0);
                   3536:        free(value);
1.364     schwarze 3537:        return ROFF_IGN;
                   3538: }
                   3539:
                   3540: /*
                   3541:  * The .break request only makes sense inside conditionals,
                   3542:  * and that case is already handled in roff_cond_sub().
                   3543:  */
                   3544: static int
                   3545: roff_break(ROFF_ARGS)
                   3546: {
                   3547:        mandoc_msg(MANDOCERR_BLK_NOTOPEN, ln, pos, "break");
1.296     schwarze 3548:        return ROFF_IGN;
1.92      schwarze 3549: }
                   3550:
1.340     schwarze 3551: static int
1.174     kristaps 3552: roff_cc(ROFF_ARGS)
                   3553: {
                   3554:        const char      *p;
                   3555:
1.238     schwarze 3556:        p = buf->buf + pos;
1.174     kristaps 3557:
1.238     schwarze 3558:        if (*p == '\0' || (r->control = *p++) == '.')
1.303     schwarze 3559:                r->control = '\0';
1.174     kristaps 3560:
1.238     schwarze 3561:        if (*p != '\0')
1.350     schwarze 3562:                mandoc_msg(MANDOCERR_ARG_EXCESS,
1.260     schwarze 3563:                    ln, p - buf->buf, "cc ... %s", p);
1.174     kristaps 3564:
1.341     schwarze 3565:        return ROFF_IGN;
                   3566: }
                   3567:
                   3568: static int
                   3569: roff_char(ROFF_ARGS)
                   3570: {
                   3571:        const char      *p, *kp, *vp;
                   3572:        size_t           ksz, vsz;
                   3573:        int              font;
                   3574:
                   3575:        /* Parse the character to be replaced. */
                   3576:
                   3577:        kp = buf->buf + pos;
                   3578:        p = kp + 1;
                   3579:        if (*kp == '\0' || (*kp == '\\' &&
                   3580:             mandoc_escape(&p, NULL, NULL) != ESCAPE_SPECIAL) ||
                   3581:            (*p != ' ' && *p != '\0')) {
1.350     schwarze 3582:                mandoc_msg(MANDOCERR_CHAR_ARG, ln, pos, "char %s", kp);
1.341     schwarze 3583:                return ROFF_IGN;
                   3584:        }
                   3585:        ksz = p - kp;
                   3586:        while (*p == ' ')
                   3587:                p++;
                   3588:
                   3589:        /*
                   3590:         * If the replacement string contains a font escape sequence,
                   3591:         * we have to restore the font at the end.
                   3592:         */
                   3593:
                   3594:        vp = p;
                   3595:        vsz = strlen(p);
                   3596:        font = 0;
                   3597:        while (*p != '\0') {
                   3598:                if (*p++ != '\\')
                   3599:                        continue;
                   3600:                switch (mandoc_escape(&p, NULL, NULL)) {
                   3601:                case ESCAPE_FONT:
                   3602:                case ESCAPE_FONTROMAN:
                   3603:                case ESCAPE_FONTITALIC:
                   3604:                case ESCAPE_FONTBOLD:
                   3605:                case ESCAPE_FONTBI:
1.378     schwarze 3606:                case ESCAPE_FONTCR:
                   3607:                case ESCAPE_FONTCB:
                   3608:                case ESCAPE_FONTCI:
1.341     schwarze 3609:                case ESCAPE_FONTPREV:
                   3610:                        font++;
                   3611:                        break;
                   3612:                default:
                   3613:                        break;
                   3614:                }
                   3615:        }
                   3616:        if (font > 1)
1.350     schwarze 3617:                mandoc_msg(MANDOCERR_CHAR_FONT,
                   3618:                    ln, (int)(vp - buf->buf), "%s", vp);
1.341     schwarze 3619:
                   3620:        /*
                   3621:         * Approximate the effect of .char using the .tr tables.
                   3622:         * XXX In groff, .char and .tr interact differently.
                   3623:         */
                   3624:
                   3625:        if (ksz == 1) {
                   3626:                if (r->xtab == NULL)
                   3627:                        r->xtab = mandoc_calloc(128, sizeof(*r->xtab));
                   3628:                assert((unsigned int)*kp < 128);
                   3629:                free(r->xtab[(int)*kp].p);
                   3630:                r->xtab[(int)*kp].sz = mandoc_asprintf(&r->xtab[(int)*kp].p,
                   3631:                    "%s%s", vp, font ? "\fP" : "");
                   3632:        } else {
                   3633:                roff_setstrn(&r->xmbtab, kp, ksz, vp, vsz, 0);
                   3634:                if (font)
                   3635:                        roff_setstrn(&r->xmbtab, kp, ksz, "\\fP", 3, 1);
                   3636:        }
1.277     schwarze 3637:        return ROFF_IGN;
1.174     kristaps 3638: }
                   3639:
1.340     schwarze 3640: static int
1.303     schwarze 3641: roff_ec(ROFF_ARGS)
                   3642: {
                   3643:        const char      *p;
                   3644:
                   3645:        p = buf->buf + pos;
                   3646:        if (*p == '\0')
                   3647:                r->escape = '\\';
                   3648:        else {
                   3649:                r->escape = *p;
                   3650:                if (*++p != '\0')
1.350     schwarze 3651:                        mandoc_msg(MANDOCERR_ARG_EXCESS, ln,
                   3652:                            (int)(p - buf->buf), "ec ... %s", p);
1.303     schwarze 3653:        }
                   3654:        return ROFF_IGN;
                   3655: }
                   3656:
1.340     schwarze 3657: static int
1.303     schwarze 3658: roff_eo(ROFF_ARGS)
                   3659: {
                   3660:        r->escape = '\0';
                   3661:        if (buf->buf[pos] != '\0')
1.350     schwarze 3662:                mandoc_msg(MANDOCERR_ARG_SKIP,
1.303     schwarze 3663:                    ln, pos, "eo %s", buf->buf + pos);
1.384     schwarze 3664:        return ROFF_IGN;
                   3665: }
                   3666:
                   3667: static int
                   3668: roff_mc(ROFF_ARGS)
                   3669: {
                   3670:        struct roff_node        *n;
                   3671:        char                    *cp;
                   3672:
                   3673:        /* Parse the first argument. */
                   3674:
                   3675:        cp = buf->buf + pos;
                   3676:        if (*cp != '\0')
                   3677:                cp++;
                   3678:        if (buf->buf[pos] == '\\') {
                   3679:                switch (mandoc_escape((const char **)&cp, NULL, NULL)) {
                   3680:                case ESCAPE_SPECIAL:
                   3681:                case ESCAPE_UNICODE:
                   3682:                case ESCAPE_NUMBERED:
                   3683:                        break;
                   3684:                default:
                   3685:                        *cp = '\0';
                   3686:                        mandoc_msg(MANDOCERR_MC_ESC, ln, pos,
                   3687:                            "mc %s", buf->buf + pos);
                   3688:                        buf->buf[pos] = '\0';
                   3689:                        break;
                   3690:                }
                   3691:        }
                   3692:
                   3693:        /* Ignore additional arguments. */
                   3694:
                   3695:        while (*cp == ' ')
                   3696:                *cp++ = '\0';
                   3697:        if (*cp != '\0') {
                   3698:                mandoc_msg(MANDOCERR_MC_DIST, ln, (int)(cp - buf->buf),
                   3699:                    "mc ... %s", cp);
                   3700:                *cp = '\0';
                   3701:        }
                   3702:
                   3703:        /* Create the .mc node. */
                   3704:
                   3705:        roff_elem_alloc(r->man, ln, ppos, tok);
                   3706:        n = r->man->last;
                   3707:        if (buf->buf[pos] != '\0')
                   3708:                roff_word_alloc(r->man, ln, pos, buf->buf + pos);
                   3709:        n->flags |= NODE_LINE | NODE_VALID | NODE_ENDED;
                   3710:        r->man->last = n;
                   3711:        r->man->next = ROFF_NEXT_SIBLING;
1.303     schwarze 3712:        return ROFF_IGN;
1.330     schwarze 3713: }
                   3714:
1.340     schwarze 3715: static int
1.330     schwarze 3716: roff_nop(ROFF_ARGS)
                   3717: {
                   3718:        while (buf->buf[pos] == ' ')
                   3719:                pos++;
                   3720:        *offs = pos;
                   3721:        return ROFF_RERUN;
1.303     schwarze 3722: }
                   3723:
1.340     schwarze 3724: static int
1.164     kristaps 3725: roff_tr(ROFF_ARGS)
                   3726: {
                   3727:        const char      *p, *first, *second;
                   3728:        size_t           fsz, ssz;
                   3729:        enum mandoc_esc  esc;
                   3730:
1.238     schwarze 3731:        p = buf->buf + pos;
1.164     kristaps 3732:
1.238     schwarze 3733:        if (*p == '\0') {
1.350     schwarze 3734:                mandoc_msg(MANDOCERR_REQ_EMPTY, ln, ppos, "tr");
1.277     schwarze 3735:                return ROFF_IGN;
1.164     kristaps 3736:        }
                   3737:
1.238     schwarze 3738:        while (*p != '\0') {
1.164     kristaps 3739:                fsz = ssz = 1;
                   3740:
                   3741:                first = p++;
1.238     schwarze 3742:                if (*first == '\\') {
1.164     kristaps 3743:                        esc = mandoc_escape(&p, NULL, NULL);
1.238     schwarze 3744:                        if (esc == ESCAPE_ERROR) {
1.350     schwarze 3745:                                mandoc_msg(MANDOCERR_ESC_BAD, ln,
                   3746:                                    (int)(p - buf->buf), "%s", first);
1.277     schwarze 3747:                                return ROFF_IGN;
1.164     kristaps 3748:                        }
                   3749:                        fsz = (size_t)(p - first);
                   3750:                }
                   3751:
                   3752:                second = p++;
1.238     schwarze 3753:                if (*second == '\\') {
1.164     kristaps 3754:                        esc = mandoc_escape(&p, NULL, NULL);
1.238     schwarze 3755:                        if (esc == ESCAPE_ERROR) {
1.350     schwarze 3756:                                mandoc_msg(MANDOCERR_ESC_BAD, ln,
                   3757:                                    (int)(p - buf->buf), "%s", second);
1.277     schwarze 3758:                                return ROFF_IGN;
1.164     kristaps 3759:                        }
                   3760:                        ssz = (size_t)(p - second);
1.238     schwarze 3761:                } else if (*second == '\0') {
1.350     schwarze 3762:                        mandoc_msg(MANDOCERR_TR_ODD, ln,
                   3763:                            (int)(first - buf->buf), "tr %s", first);
1.164     kristaps 3764:                        second = " ";
1.165     kristaps 3765:                        p--;
1.164     kristaps 3766:                }
                   3767:
1.167     kristaps 3768:                if (fsz > 1) {
1.207     schwarze 3769:                        roff_setstrn(&r->xmbtab, first, fsz,
                   3770:                            second, ssz, 0);
1.167     kristaps 3771:                        continue;
                   3772:                }
                   3773:
1.238     schwarze 3774:                if (r->xtab == NULL)
1.207     schwarze 3775:                        r->xtab = mandoc_calloc(128,
                   3776:                            sizeof(struct roffstr));
1.167     kristaps 3777:
                   3778:                free(r->xtab[(int)*first].p);
                   3779:                r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
                   3780:                r->xtab[(int)*first].sz = ssz;
1.164     kristaps 3781:        }
                   3782:
1.277     schwarze 3783:        return ROFF_IGN;
1.164     kristaps 3784: }
                   3785:
1.339     schwarze 3786: /*
                   3787:  * Implementation of the .return request.
                   3788:  * There is no need to call roff_userret() from here.
                   3789:  * The read module will call that after rewinding the reader stack
                   3790:  * to the place from where the current macro was called.
                   3791:  */
1.340     schwarze 3792: static int
1.339     schwarze 3793: roff_return(ROFF_ARGS)
                   3794: {
                   3795:        if (r->mstackpos >= 0)
1.340     schwarze 3796:                return ROFF_IGN | ROFF_USERRET;
1.339     schwarze 3797:
1.350     schwarze 3798:        mandoc_msg(MANDOCERR_REQ_NOMAC, ln, ppos, "return");
1.339     schwarze 3799:        return ROFF_IGN;
                   3800: }
                   3801:
1.340     schwarze 3802: static int
1.306     schwarze 3803: roff_rn(ROFF_ARGS)
                   3804: {
                   3805:        const char      *value;
                   3806:        char            *oldn, *newn, *end;
                   3807:        size_t           oldsz, newsz;
1.315     schwarze 3808:        int              deftype;
1.306     schwarze 3809:
                   3810:        oldn = newn = buf->buf + pos;
                   3811:        if (*oldn == '\0')
                   3812:                return ROFF_IGN;
                   3813:
                   3814:        oldsz = roff_getname(r, &newn, ln, pos);
1.363     schwarze 3815:        if (oldn[oldsz] == '\\' || oldn[oldsz] == '\t' || *newn == '\0')
1.306     schwarze 3816:                return ROFF_IGN;
                   3817:
                   3818:        end = newn;
                   3819:        newsz = roff_getname(r, &end, ln, newn - buf->buf);
                   3820:        if (newsz == 0)
                   3821:                return ROFF_IGN;
                   3822:
1.315     schwarze 3823:        deftype = ROFFDEF_ANY;
                   3824:        value = roff_getstrn(r, oldn, oldsz, &deftype);
                   3825:        switch (deftype) {
                   3826:        case ROFFDEF_USER:
1.306     schwarze 3827:                roff_setstrn(&r->strtab, newn, newsz, value, strlen(value), 0);
                   3828:                roff_setstrn(&r->strtab, oldn, oldsz, NULL, 0, 0);
                   3829:                roff_setstrn(&r->rentab, newn, newsz, NULL, 0, 0);
1.315     schwarze 3830:                break;
                   3831:        case ROFFDEF_PRE:
                   3832:                roff_setstrn(&r->strtab, newn, newsz, value, strlen(value), 0);
                   3833:                roff_setstrn(&r->rentab, newn, newsz, NULL, 0, 0);
                   3834:                break;
                   3835:        case ROFFDEF_REN:
1.306     schwarze 3836:                roff_setstrn(&r->rentab, newn, newsz, value, strlen(value), 0);
                   3837:                roff_setstrn(&r->rentab, oldn, oldsz, NULL, 0, 0);
1.315     schwarze 3838:                roff_setstrn(&r->strtab, newn, newsz, NULL, 0, 0);
                   3839:                break;
                   3840:        case ROFFDEF_STD:
1.306     schwarze 3841:                roff_setstrn(&r->rentab, newn, newsz, oldn, oldsz, 0);
1.315     schwarze 3842:                roff_setstrn(&r->strtab, newn, newsz, NULL, 0, 0);
                   3843:                break;
                   3844:        default:
                   3845:                roff_setstrn(&r->strtab, newn, newsz, NULL, 0, 0);
                   3846:                roff_setstrn(&r->rentab, newn, newsz, NULL, 0, 0);
                   3847:                break;
                   3848:        }
1.306     schwarze 3849:        return ROFF_IGN;
                   3850: }
                   3851:
1.340     schwarze 3852: static int
1.339     schwarze 3853: roff_shift(ROFF_ARGS)
                   3854: {
                   3855:        struct mctx     *ctx;
1.382     schwarze 3856:        int              argpos, levels, i;
1.339     schwarze 3857:
1.382     schwarze 3858:        argpos = pos;
1.339     schwarze 3859:        levels = 1;
                   3860:        if (buf->buf[pos] != '\0' &&
                   3861:            roff_evalnum(r, ln, buf->buf, &pos, &levels, 0) == 0) {
1.350     schwarze 3862:                mandoc_msg(MANDOCERR_CE_NONUM,
1.339     schwarze 3863:                    ln, pos, "shift %s", buf->buf + pos);
                   3864:                levels = 1;
                   3865:        }
                   3866:        if (r->mstackpos < 0) {
1.350     schwarze 3867:                mandoc_msg(MANDOCERR_REQ_NOMAC, ln, ppos, "shift");
1.339     schwarze 3868:                return ROFF_IGN;
                   3869:        }
                   3870:        ctx = r->mstack + r->mstackpos;
                   3871:        if (levels > ctx->argc) {
1.350     schwarze 3872:                mandoc_msg(MANDOCERR_SHIFT,
1.382     schwarze 3873:                    ln, argpos, "%d, but max is %d", levels, ctx->argc);
1.339     schwarze 3874:                levels = ctx->argc;
1.382     schwarze 3875:        }
                   3876:        if (levels < 0) {
                   3877:                mandoc_msg(MANDOCERR_ARG_NEG, ln, argpos, "shift %d", levels);
                   3878:                levels = 0;
1.339     schwarze 3879:        }
                   3880:        if (levels == 0)
                   3881:                return ROFF_IGN;
                   3882:        for (i = 0; i < levels; i++)
                   3883:                free(ctx->argv[i]);
                   3884:        ctx->argc -= levels;
                   3885:        for (i = 0; i < ctx->argc; i++)
                   3886:                ctx->argv[i] = ctx->argv[i + levels];
                   3887:        return ROFF_IGN;
                   3888: }
                   3889:
1.340     schwarze 3890: static int
1.105     kristaps 3891: roff_so(ROFF_ARGS)
                   3892: {
1.249     schwarze 3893:        char *name, *cp;
1.105     kristaps 3894:
1.238     schwarze 3895:        name = buf->buf + pos;
1.350     schwarze 3896:        mandoc_msg(MANDOCERR_SO, ln, ppos, "so %s", name);
1.105     kristaps 3897:
                   3898:        /*
                   3899:         * Handle `so'.  Be EXTREMELY careful, as we shouldn't be
                   3900:         * opening anything that's not in our cwd or anything beneath
                   3901:         * it.  Thus, explicitly disallow traversing up the file-system
                   3902:         * or using absolute paths.
                   3903:         */
                   3904:
1.238     schwarze 3905:        if (*name == '/' || strstr(name, "../") || strstr(name, "/..")) {
1.350     schwarze 3906:                mandoc_msg(MANDOCERR_SO_PATH, ln, ppos, ".so %s", name);
1.249     schwarze 3907:                buf->sz = mandoc_asprintf(&cp,
                   3908:                    ".sp\nSee the file %s.\n.sp", name) + 1;
                   3909:                free(buf->buf);
                   3910:                buf->buf = cp;
                   3911:                *offs = 0;
1.277     schwarze 3912:                return ROFF_REPARSE;
1.105     kristaps 3913:        }
                   3914:
                   3915:        *offs = pos;
1.277     schwarze 3916:        return ROFF_SO;
1.105     kristaps 3917: }
1.92      schwarze 3918:
1.266     schwarze 3919: /* --- user defined strings and macros ------------------------------------ */
                   3920:
1.340     schwarze 3921: static int
1.106     kristaps 3922: roff_userdef(ROFF_ARGS)
1.99      kristaps 3923: {
1.339     schwarze 3924:        struct mctx      *ctx;
                   3925:        char             *arg, *ap, *dst, *src;
                   3926:        size_t            sz;
                   3927:
1.365     schwarze 3928:        /* If the macro is empty, ignore it altogether. */
                   3929:
                   3930:        if (*r->current_string == '\0')
                   3931:                return ROFF_IGN;
                   3932:
1.339     schwarze 3933:        /* Initialize a new macro stack context. */
                   3934:
                   3935:        if (++r->mstackpos == r->mstacksz) {
                   3936:                r->mstack = mandoc_recallocarray(r->mstack,
                   3937:                    r->mstacksz, r->mstacksz + 8, sizeof(*r->mstack));
                   3938:                r->mstacksz += 8;
                   3939:        }
                   3940:        ctx = r->mstack + r->mstackpos;
                   3941:        ctx->argc = 0;
                   3942:
                   3943:        /*
                   3944:         * Collect pointers to macro argument strings,
                   3945:         * NUL-terminating them and escaping quotes.
                   3946:         */
                   3947:
                   3948:        src = buf->buf + pos;
                   3949:        while (*src != '\0') {
                   3950:                if (ctx->argc == ctx->argsz) {
                   3951:                        ctx->argsz += 8;
                   3952:                        ctx->argv = mandoc_reallocarray(ctx->argv,
                   3953:                            ctx->argsz, sizeof(*ctx->argv));
                   3954:                }
1.355     schwarze 3955:                arg = roff_getarg(r, &src, ln, &pos);
1.339     schwarze 3956:                sz = 1;  /* For the terminating NUL. */
                   3957:                for (ap = arg; *ap != '\0'; ap++)
                   3958:                        sz += *ap == '"' ? 4 : 1;
                   3959:                ctx->argv[ctx->argc++] = dst = mandoc_malloc(sz);
                   3960:                for (ap = arg; *ap != '\0'; ap++) {
                   3961:                        if (*ap == '"') {
                   3962:                                memcpy(dst, "\\(dq", 4);
                   3963:                                dst += 4;
                   3964:                        } else
                   3965:                                *dst++ = *ap;
1.106     kristaps 3966:                }
1.339     schwarze 3967:                *dst = '\0';
1.355     schwarze 3968:                free(arg);
1.337     schwarze 3969:        }
                   3970:
1.339     schwarze 3971:        /* Replace the macro invocation by the macro definition. */
1.263     schwarze 3972:
1.238     schwarze 3973:        free(buf->buf);
1.339     schwarze 3974:        buf->buf = mandoc_strdup(r->current_string);
                   3975:        buf->sz = strlen(buf->buf) + 1;
1.248     schwarze 3976:        *offs = 0;
1.106     kristaps 3977:
1.365     schwarze 3978:        return buf->buf[buf->sz - 2] == '\n' ?
1.340     schwarze 3979:            ROFF_REPARSE | ROFF_USERCALL : ROFF_IGN | ROFF_APPEND;
1.99      kristaps 3980: }
1.121     schwarze 3981:
1.306     schwarze 3982: /*
                   3983:  * Calling a high-level macro that was renamed with .rn.
                   3984:  * r->current_string has already been set up by roff_parse().
                   3985:  */
1.340     schwarze 3986: static int
1.306     schwarze 3987: roff_renamed(ROFF_ARGS)
                   3988: {
                   3989:        char    *nbuf;
                   3990:
1.315     schwarze 3991:        buf->sz = mandoc_asprintf(&nbuf, ".%s%s%s", r->current_string,
                   3992:            buf->buf[pos] == '\0' ? "" : " ", buf->buf + pos) + 1;
1.306     schwarze 3993:        free(buf->buf);
                   3994:        buf->buf = nbuf;
1.329     schwarze 3995:        *offs = 0;
1.306     schwarze 3996:        return ROFF_CONT;
                   3997: }
                   3998:
1.362     schwarze 3999: /*
                   4000:  * Measure the length in bytes of the roff identifier at *cpp
                   4001:  * and advance the pointer to the next word.
                   4002:  */
1.212     schwarze 4003: static size_t
1.121     schwarze 4004: roff_getname(struct roff *r, char **cpp, int ln, int pos)
                   4005: {
                   4006:        char     *name, *cp;
1.212     schwarze 4007:        size_t    namesz;
1.121     schwarze 4008:
                   4009:        name = *cpp;
1.362     schwarze 4010:        if (*name == '\0')
1.277     schwarze 4011:                return 0;
1.121     schwarze 4012:
1.362     schwarze 4013:        /* Advance cp to the byte after the end of the name. */
                   4014:
1.212     schwarze 4015:        for (cp = name; 1; cp++) {
1.362     schwarze 4016:                namesz = cp - name;
1.363     schwarze 4017:                if (*cp == '\0')
1.212     schwarze 4018:                        break;
1.363     schwarze 4019:                if (*cp == ' ' || *cp == '\t') {
                   4020:                        cp++;
                   4021:                        break;
                   4022:                }
1.362     schwarze 4023:                if (*cp != '\\')
1.121     schwarze 4024:                        continue;
1.362     schwarze 4025:                if (cp[1] == '{' || cp[1] == '}')
1.215     schwarze 4026:                        break;
1.362     schwarze 4027:                if (*++cp == '\\')
1.121     schwarze 4028:                        continue;
1.350     schwarze 4029:                mandoc_msg(MANDOCERR_NAMESC, ln, pos,
1.224     schwarze 4030:                    "%.*s", (int)(cp - name + 1), name);
1.212     schwarze 4031:                mandoc_escape((const char **)&cp, NULL, NULL);
                   4032:                break;
1.121     schwarze 4033:        }
                   4034:
                   4035:        /* Read past spaces. */
1.362     schwarze 4036:
                   4037:        while (*cp == ' ')
1.121     schwarze 4038:                cp++;
                   4039:
                   4040:        *cpp = cp;
1.277     schwarze 4041:        return namesz;
1.121     schwarze 4042: }
                   4043:
1.106     kristaps 4044: /*
                   4045:  * Store *string into the user-defined string called *name.
                   4046:  * To clear an existing entry, call with (*r, *name, NULL, 0).
1.193     schwarze 4047:  * append == 0: replace mode
                   4048:  * append == 1: single-line append mode
                   4049:  * append == 2: multiline append mode, append '\n' after each call
1.106     kristaps 4050:  */
1.94      kristaps 4051: static void
1.106     kristaps 4052: roff_setstr(struct roff *r, const char *name, const char *string,
1.193     schwarze 4053:        int append)
1.92      schwarze 4054: {
1.315     schwarze 4055:        size_t   namesz;
1.164     kristaps 4056:
1.315     schwarze 4057:        namesz = strlen(name);
                   4058:        roff_setstrn(&r->strtab, name, namesz, string,
1.207     schwarze 4059:            string ? strlen(string) : 0, append);
1.315     schwarze 4060:        roff_setstrn(&r->rentab, name, namesz, NULL, 0, 0);
1.164     kristaps 4061: }
                   4062:
                   4063: static void
1.166     kristaps 4064: roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
1.193     schwarze 4065:                const char *string, size_t stringsz, int append)
1.164     kristaps 4066: {
1.166     kristaps 4067:        struct roffkv   *n;
1.164     kristaps 4068:        char            *c;
                   4069:        int              i;
                   4070:        size_t           oldch, newch;
1.92      schwarze 4071:
1.106     kristaps 4072:        /* Search for an existing string with the same name. */
1.164     kristaps 4073:        n = *r;
                   4074:
1.211     schwarze 4075:        while (n && (namesz != n->key.sz ||
                   4076:                        strncmp(n->key.p, name, namesz)))
1.92      schwarze 4077:                n = n->next;
1.94      kristaps 4078:
                   4079:        if (NULL == n) {
1.106     kristaps 4080:                /* Create a new string table entry. */
1.166     kristaps 4081:                n = mandoc_malloc(sizeof(struct roffkv));
                   4082:                n->key.p = mandoc_strndup(name, namesz);
                   4083:                n->key.sz = namesz;
                   4084:                n->val.p = NULL;
                   4085:                n->val.sz = 0;
1.164     kristaps 4086:                n->next = *r;
                   4087:                *r = n;
1.193     schwarze 4088:        } else if (0 == append) {
1.166     kristaps 4089:                free(n->val.p);
                   4090:                n->val.p = NULL;
                   4091:                n->val.sz = 0;
1.106     kristaps 4092:        }
                   4093:
                   4094:        if (NULL == string)
                   4095:                return;
                   4096:
                   4097:        /*
                   4098:         * One additional byte for the '\n' in multiline mode,
                   4099:         * and one for the terminating '\0'.
                   4100:         */
1.193     schwarze 4101:        newch = stringsz + (1 < append ? 2u : 1u);
1.164     kristaps 4102:
1.166     kristaps 4103:        if (NULL == n->val.p) {
                   4104:                n->val.p = mandoc_malloc(newch);
                   4105:                *n->val.p = '\0';
1.106     kristaps 4106:                oldch = 0;
                   4107:        } else {
1.166     kristaps 4108:                oldch = n->val.sz;
                   4109:                n->val.p = mandoc_realloc(n->val.p, oldch + newch);
1.106     kristaps 4110:        }
                   4111:
                   4112:        /* Skip existing content in the destination buffer. */
1.166     kristaps 4113:        c = n->val.p + (int)oldch;
1.106     kristaps 4114:
                   4115:        /* Append new content to the destination buffer. */
1.164     kristaps 4116:        i = 0;
                   4117:        while (i < (int)stringsz) {
1.106     kristaps 4118:                /*
                   4119:                 * Rudimentary roff copy mode:
                   4120:                 * Handle escaped backslashes.
                   4121:                 */
1.164     kristaps 4122:                if ('\\' == string[i] && '\\' == string[i + 1])
                   4123:                        i++;
                   4124:                *c++ = string[i++];
1.106     kristaps 4125:        }
1.94      kristaps 4126:
1.106     kristaps 4127:        /* Append terminating bytes. */
1.193     schwarze 4128:        if (1 < append)
1.106     kristaps 4129:                *c++ = '\n';
1.163     kristaps 4130:
1.106     kristaps 4131:        *c = '\0';
1.166     kristaps 4132:        n->val.sz = (int)(c - n->val.p);
1.92      schwarze 4133: }
                   4134:
1.94      kristaps 4135: static const char *
1.325     schwarze 4136: roff_getstrn(struct roff *r, const char *name, size_t len,
1.315     schwarze 4137:     int *deftype)
1.92      schwarze 4138: {
1.315     schwarze 4139:        const struct roffkv     *n;
1.325     schwarze 4140:        int                      found, i;
1.315     schwarze 4141:        enum roff_tok            tok;
                   4142:
1.325     schwarze 4143:        found = 0;
                   4144:        for (n = r->strtab; n != NULL; n = n->next) {
                   4145:                if (strncmp(name, n->key.p, len) != 0 ||
                   4146:                    n->key.p[len] != '\0' || n->val.p == NULL)
                   4147:                        continue;
                   4148:                if (*deftype & ROFFDEF_USER) {
                   4149:                        *deftype = ROFFDEF_USER;
                   4150:                        return n->val.p;
                   4151:                } else {
                   4152:                        found = 1;
                   4153:                        break;
                   4154:                }
                   4155:        }
                   4156:        for (n = r->rentab; n != NULL; n = n->next) {
                   4157:                if (strncmp(name, n->key.p, len) != 0 ||
                   4158:                    n->key.p[len] != '\0' || n->val.p == NULL)
                   4159:                        continue;
                   4160:                if (*deftype & ROFFDEF_REN) {
                   4161:                        *deftype = ROFFDEF_REN;
                   4162:                        return n->val.p;
                   4163:                } else {
                   4164:                        found = 1;
                   4165:                        break;
1.315     schwarze 4166:                }
                   4167:        }
1.325     schwarze 4168:        for (i = 0; i < PREDEFS_MAX; i++) {
                   4169:                if (strncmp(name, predefs[i].name, len) != 0 ||
                   4170:                    predefs[i].name[len] != '\0')
                   4171:                        continue;
                   4172:                if (*deftype & ROFFDEF_PRE) {
                   4173:                        *deftype = ROFFDEF_PRE;
                   4174:                        return predefs[i].str;
                   4175:                } else {
                   4176:                        found = 1;
                   4177:                        break;
1.315     schwarze 4178:                }
                   4179:        }
1.356     schwarze 4180:        if (r->man->meta.macroset != MACROSET_MAN) {
1.325     schwarze 4181:                for (tok = MDOC_Dd; tok < MDOC_MAX; tok++) {
                   4182:                        if (strncmp(name, roff_name[tok], len) != 0 ||
                   4183:                            roff_name[tok][len] != '\0')
                   4184:                                continue;
                   4185:                        if (*deftype & ROFFDEF_STD) {
                   4186:                                *deftype = ROFFDEF_STD;
                   4187:                                return NULL;
                   4188:                        } else {
                   4189:                                found = 1;
                   4190:                                break;
1.315     schwarze 4191:                        }
                   4192:                }
                   4193:        }
1.356     schwarze 4194:        if (r->man->meta.macroset != MACROSET_MDOC) {
1.325     schwarze 4195:                for (tok = MAN_TH; tok < MAN_MAX; tok++) {
                   4196:                        if (strncmp(name, roff_name[tok], len) != 0 ||
                   4197:                            roff_name[tok][len] != '\0')
                   4198:                                continue;
                   4199:                        if (*deftype & ROFFDEF_STD) {
                   4200:                                *deftype = ROFFDEF_STD;
                   4201:                                return NULL;
                   4202:                        } else {
                   4203:                                found = 1;
                   4204:                                break;
1.315     schwarze 4205:                        }
                   4206:                }
1.325     schwarze 4207:        }
                   4208:
                   4209:        if (found == 0 && *deftype != ROFFDEF_ANY) {
                   4210:                if (*deftype & ROFFDEF_REN) {
                   4211:                        /*
                   4212:                         * This might still be a request,
                   4213:                         * so do not treat it as undefined yet.
                   4214:                         */
                   4215:                        *deftype = ROFFDEF_UNDEF;
                   4216:                        return NULL;
1.315     schwarze 4217:                }
1.325     schwarze 4218:
                   4219:                /* Using an undefined string defines it to be empty. */
                   4220:
                   4221:                roff_setstrn(&r->strtab, name, len, "", 0, 0);
                   4222:                roff_setstrn(&r->rentab, name, len, NULL, 0, 0);
1.315     schwarze 4223:        }
1.325     schwarze 4224:
1.315     schwarze 4225:        *deftype = 0;
1.277     schwarze 4226:        return NULL;
1.92      schwarze 4227: }
                   4228:
1.94      kristaps 4229: static void
1.167     kristaps 4230: roff_freestr(struct roffkv *r)
1.92      schwarze 4231: {
1.166     kristaps 4232:        struct roffkv    *n, *nn;
1.92      schwarze 4233:
1.167     kristaps 4234:        for (n = r; n; n = nn) {
1.166     kristaps 4235:                free(n->key.p);
                   4236:                free(n->val.p);
1.92      schwarze 4237:                nn = n->next;
                   4238:                free(n);
                   4239:        }
1.114     kristaps 4240: }
1.266     schwarze 4241:
                   4242: /* --- accessors and utility functions ------------------------------------ */
1.164     kristaps 4243:
                   4244: /*
                   4245:  * Duplicate an input string, making the appropriate character
                   4246:  * conversations (as stipulated by `tr') along the way.
                   4247:  * Returns a heap-allocated string with all the replacements made.
                   4248:  */
                   4249: char *
                   4250: roff_strdup(const struct roff *r, const char *p)
                   4251: {
1.166     kristaps 4252:        const struct roffkv *cp;
1.164     kristaps 4253:        char            *res;
                   4254:        const char      *pp;
                   4255:        size_t           ssz, sz;
                   4256:        enum mandoc_esc  esc;
                   4257:
1.167     kristaps 4258:        if (NULL == r->xmbtab && NULL == r->xtab)
1.277     schwarze 4259:                return mandoc_strdup(p);
1.164     kristaps 4260:        else if ('\0' == *p)
1.277     schwarze 4261:                return mandoc_strdup("");
1.164     kristaps 4262:
                   4263:        /*
                   4264:         * Step through each character looking for term matches
                   4265:         * (remember that a `tr' can be invoked with an escape, which is
                   4266:         * a glyph but the escape is multi-character).
                   4267:         * We only do this if the character hash has been initialised
                   4268:         * and the string is >0 length.
                   4269:         */
                   4270:
                   4271:        res = NULL;
                   4272:        ssz = 0;
                   4273:
                   4274:        while ('\0' != *p) {
1.289     schwarze 4275:                assert((unsigned int)*p < 128);
                   4276:                if ('\\' != *p && r->xtab && r->xtab[(unsigned int)*p].p) {
1.167     kristaps 4277:                        sz = r->xtab[(int)*p].sz;
                   4278:                        res = mandoc_realloc(res, ssz + sz + 1);
                   4279:                        memcpy(res + ssz, r->xtab[(int)*p].p, sz);
                   4280:                        ssz += sz;
                   4281:                        p++;
                   4282:                        continue;
                   4283:                } else if ('\\' != *p) {
                   4284:                        res = mandoc_realloc(res, ssz + 2);
                   4285:                        res[ssz++] = *p++;
                   4286:                        continue;
                   4287:                }
                   4288:
1.164     kristaps 4289:                /* Search for term matches. */
1.167     kristaps 4290:                for (cp = r->xmbtab; cp; cp = cp->next)
1.166     kristaps 4291:                        if (0 == strncmp(p, cp->key.p, cp->key.sz))
1.164     kristaps 4292:                                break;
                   4293:
                   4294:                if (NULL != cp) {
                   4295:                        /*
                   4296:                         * A match has been found.
                   4297:                         * Append the match to the array and move
                   4298:                         * forward by its keysize.
                   4299:                         */
1.207     schwarze 4300:                        res = mandoc_realloc(res,
                   4301:                            ssz + cp->val.sz + 1);
1.166     kristaps 4302:                        memcpy(res + ssz, cp->val.p, cp->val.sz);
                   4303:                        ssz += cp->val.sz;
                   4304:                        p += (int)cp->key.sz;
1.164     kristaps 4305:                        continue;
                   4306:                }
                   4307:
1.167     kristaps 4308:                /*
                   4309:                 * Handle escapes carefully: we need to copy
                   4310:                 * over just the escape itself, or else we might
                   4311:                 * do replacements within the escape itself.
                   4312:                 * Make sure to pass along the bogus string.
                   4313:                 */
                   4314:                pp = p++;
                   4315:                esc = mandoc_escape(&p, NULL, NULL);
                   4316:                if (ESCAPE_ERROR == esc) {
                   4317:                        sz = strlen(pp);
1.164     kristaps 4318:                        res = mandoc_realloc(res, ssz + sz + 1);
                   4319:                        memcpy(res + ssz, pp, sz);
1.167     kristaps 4320:                        break;
1.164     kristaps 4321:                }
1.207     schwarze 4322:                /*
                   4323:                 * We bail out on bad escapes.
1.167     kristaps 4324:                 * No need to warn: we already did so when
1.355     schwarze 4325:                 * roff_expand() was called.
1.167     kristaps 4326:                 */
                   4327:                sz = (int)(p - pp);
                   4328:                res = mandoc_realloc(res, ssz + sz + 1);
                   4329:                memcpy(res + ssz, pp, sz);
                   4330:                ssz += sz;
1.164     kristaps 4331:        }
                   4332:
                   4333:        res[(int)ssz] = '\0';
1.277     schwarze 4334:        return res;
1.227     schwarze 4335: }
                   4336:
                   4337: int
                   4338: roff_getformat(const struct roff *r)
                   4339: {
                   4340:
1.277     schwarze 4341:        return r->format;
1.174     kristaps 4342: }
                   4343:
                   4344: /*
1.207     schwarze 4345:  * Find out whether a line is a macro line or not.
1.174     kristaps 4346:  * If it is, adjust the current position and return one; if it isn't,
                   4347:  * return zero and don't change the current position.
                   4348:  * If the control character has been set with `.cc', then let that grain
                   4349:  * precedence.
                   4350:  * This is slighly contrary to groff, where using the non-breaking
                   4351:  * control character when `cc' has been invoked will cause the
                   4352:  * non-breaking macro contents to be printed verbatim.
                   4353:  */
                   4354: int
                   4355: roff_getcontrol(const struct roff *r, const char *cp, int *ppos)
                   4356: {
                   4357:        int             pos;
                   4358:
                   4359:        pos = *ppos;
                   4360:
1.303     schwarze 4361:        if (r->control != '\0' && cp[pos] == r->control)
1.174     kristaps 4362:                pos++;
1.303     schwarze 4363:        else if (r->control != '\0')
1.277     schwarze 4364:                return 0;
1.174     kristaps 4365:        else if ('\\' == cp[pos] && '.' == cp[pos + 1])
                   4366:                pos += 2;
                   4367:        else if ('.' == cp[pos] || '\'' == cp[pos])
                   4368:                pos++;
                   4369:        else
1.277     schwarze 4370:                return 0;
1.174     kristaps 4371:
                   4372:        while (' ' == cp[pos] || '\t' == cp[pos])
                   4373:                pos++;
                   4374:
                   4375:        *ppos = pos;
1.277     schwarze 4376:        return 1;
1.74      kristaps 4377: }

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