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Annotation of mandoc/roff.c, Revision 1.301

1.301   ! schwarze    1: /*     $Id: roff.c,v 1.300 2017/05/07 17:31:45 schwarze Exp $ */
1.1       kristaps    2: /*
1.267     schwarze    3:  * Copyright (c) 2008-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
1.287     schwarze    4:  * Copyright (c) 2010-2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
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.
1.1       kristaps   17:  */
1.66      kristaps   18: #include "config.h"
1.225     schwarze   19:
                     20: #include <sys/types.h>
1.30      kristaps   21:
1.67      kristaps   22: #include <assert.h>
1.85      kristaps   23: #include <ctype.h>
1.245     schwarze   24: #include <limits.h>
1.295     schwarze   25: #include <stddef.h>
                     26: #include <stdint.h>
1.178     schwarze   27: #include <stdio.h>
1.1       kristaps   28: #include <stdlib.h>
1.67      kristaps   29: #include <string.h>
1.1       kristaps   30:
1.67      kristaps   31: #include "mandoc.h"
1.201     schwarze   32: #include "mandoc_aux.h"
1.295     schwarze   33: #include "mandoc_ohash.h"
1.265     schwarze   34: #include "roff.h"
1.226     schwarze   35: #include "libmandoc.h"
1.266     schwarze   36: #include "roff_int.h"
1.109     kristaps   37: #include "libroff.h"
1.82      kristaps   38:
1.170     schwarze   39: /* Maximum number of string expansions per line, to break infinite loops. */
                     40: #define        EXPAND_LIMIT    1000
                     41:
1.266     schwarze   42: /* --- data types --------------------------------------------------------- */
                     43:
1.147     kristaps   44: /*
1.167     kristaps   45:  * An incredibly-simple string buffer.
                     46:  */
1.94      kristaps   47: struct roffstr {
1.167     kristaps   48:        char            *p; /* nil-terminated buffer */
                     49:        size_t           sz; /* saved strlen(p) */
1.166     kristaps   50: };
                     51:
                     52: /*
1.167     kristaps   53:  * A key-value roffstr pair as part of a singly-linked list.
1.166     kristaps   54:  */
                     55: struct roffkv {
                     56:        struct roffstr   key;
                     57:        struct roffstr   val;
                     58:        struct roffkv   *next; /* next in list */
1.94      kristaps   59: };
                     60:
1.180     schwarze   61: /*
                     62:  * A single number register as part of a singly-linked list.
                     63:  */
                     64: struct roffreg {
                     65:        struct roffstr   key;
1.181     schwarze   66:        int              val;
1.180     schwarze   67:        struct roffreg  *next;
                     68: };
                     69:
1.295     schwarze   70: /*
                     71:  * Association of request and macro names with token IDs.
                     72:  */
                     73: struct roffreq {
                     74:        enum roff_tok    tok;
                     75:        char             name[];
                     76: };
                     77:
1.67      kristaps   78: struct roff {
1.128     kristaps   79:        struct mparse   *parse; /* parse point */
1.296     schwarze   80:        struct roff_man *man; /* mdoc or man parser */
1.67      kristaps   81:        struct roffnode *last; /* leaf of stack */
1.223     schwarze   82:        int             *rstack; /* stack of inverted `ie' values */
1.295     schwarze   83:        struct ohash    *reqtab; /* request lookup table */
1.180     schwarze   84:        struct roffreg  *regtab; /* number registers */
1.166     kristaps   85:        struct roffkv   *strtab; /* user-defined strings & macros */
1.167     kristaps   86:        struct roffkv   *xmbtab; /* multi-byte trans table (`tr') */
                     87:        struct roffstr  *xtab; /* single-byte trans table (`tr') */
1.106     kristaps   88:        const char      *current_string; /* value of last called user macro */
1.118     kristaps   89:        struct tbl_node *first_tbl; /* first table parsed */
                     90:        struct tbl_node *last_tbl; /* last table parsed */
                     91:        struct tbl_node *tbl; /* current table being parsed */
1.125     kristaps   92:        struct eqn_node *last_eqn; /* last equation parsed */
                     93:        struct eqn_node *first_eqn; /* first equation parsed */
                     94:        struct eqn_node *eqn; /* current equation being parsed */
1.230     schwarze   95:        int              eqn_inline; /* current equation is inline */
1.223     schwarze   96:        int              options; /* parse options */
                     97:        int              rstacksz; /* current size limit of rstack */
                     98:        int              rstackpos; /* position in rstack */
1.227     schwarze   99:        int              format; /* current file in mdoc or man format */
1.273     schwarze  100:        int              argc; /* number of args of the last macro */
1.223     schwarze  101:        char             control; /* control character */
1.79      kristaps  102: };
                    103:
1.67      kristaps  104: struct roffnode {
1.294     schwarze  105:        enum roff_tok    tok; /* type of node */
1.67      kristaps  106:        struct roffnode *parent; /* up one in stack */
                    107:        int              line; /* parse line */
                    108:        int              col; /* parse col */
1.106     kristaps  109:        char            *name; /* node name, e.g. macro name */
1.79      kristaps  110:        char            *end; /* end-rules: custom token */
                    111:        int              endspan; /* end-rules: next-line or infty */
1.198     schwarze  112:        int              rule; /* current evaluation rule */
1.67      kristaps  113: };
                    114:
                    115: #define        ROFF_ARGS        struct roff *r, /* parse ctx */ \
1.294     schwarze  116:                         enum roff_tok tok, /* tok of macro */ \
1.238     schwarze  117:                         struct buf *buf, /* input buffer */ \
1.67      kristaps  118:                         int ln, /* parse line */ \
1.75      kristaps  119:                         int ppos, /* original pos in buffer */ \
                    120:                         int pos, /* current pos in buffer */ \
1.74      kristaps  121:                         int *offs /* reset offset of buffer data */
1.67      kristaps  122:
                    123: typedef        enum rofferr (*roffproc)(ROFF_ARGS);
                    124:
                    125: struct roffmac {
1.79      kristaps  126:        roffproc         proc; /* process new macro */
                    127:        roffproc         text; /* process as child text of macro */
                    128:        roffproc         sub; /* process as child of macro */
                    129:        int              flags;
                    130: #define        ROFFMAC_STRUCT  (1 << 0) /* always interpret */
1.67      kristaps  131: };
                    132:
1.141     kristaps  133: struct predef {
                    134:        const char      *name; /* predefined input name */
                    135:        const char      *str; /* replacement symbol */
                    136: };
                    137:
                    138: #define        PREDEF(__name, __str) \
                    139:        { (__name), (__str) },
                    140:
1.266     schwarze  141: /* --- function prototypes ------------------------------------------------ */
                    142:
1.155     kristaps  143: static void             roffnode_cleanscope(struct roff *);
                    144: static void             roffnode_pop(struct roff *);
1.294     schwarze  145: static void             roffnode_push(struct roff *, enum roff_tok,
1.155     kristaps  146:                                const char *, int, int);
1.80      kristaps  147: static enum rofferr     roff_block(ROFF_ARGS);
                    148: static enum rofferr     roff_block_text(ROFF_ARGS);
                    149: static enum rofferr     roff_block_sub(ROFF_ARGS);
1.296     schwarze  150: static enum rofferr     roff_br(ROFF_ARGS);
1.80      kristaps  151: static enum rofferr     roff_cblock(ROFF_ARGS);
1.174     kristaps  152: static enum rofferr     roff_cc(ROFF_ARGS);
1.195     schwarze  153: static void             roff_ccond(struct roff *, int, int);
1.82      kristaps  154: static enum rofferr     roff_cond(ROFF_ARGS);
                    155: static enum rofferr     roff_cond_text(ROFF_ARGS);
                    156: static enum rofferr     roff_cond_sub(ROFF_ARGS);
1.92      schwarze  157: static enum rofferr     roff_ds(ROFF_ARGS);
1.238     schwarze  158: static enum rofferr     roff_eqndelim(struct roff *, struct buf *, int);
1.271     schwarze  159: static int              roff_evalcond(struct roff *r, int, char *, int *);
1.234     kristaps  160: static int              roff_evalnum(struct roff *, int,
                    161:                                const char *, int *, int *, int);
                    162: static int              roff_evalpar(struct roff *, int,
1.261     schwarze  163:                                const char *, int *, int *, int);
1.198     schwarze  164: static int              roff_evalstrcond(const char *, int *);
1.155     kristaps  165: static void             roff_free1(struct roff *);
1.180     schwarze  166: static void             roff_freereg(struct roffreg *);
1.167     kristaps  167: static void             roff_freestr(struct roffkv *);
1.212     schwarze  168: static size_t           roff_getname(struct roff *, char **, int, int);
1.261     schwarze  169: static int              roff_getnum(const char *, int *, int *, int);
1.184     schwarze  170: static int              roff_getop(const char *, int *, char *);
1.181     schwarze  171: static int              roff_getregn(const struct roff *,
                    172:                                const char *, size_t);
1.273     schwarze  173: static int              roff_getregro(const struct roff *,
                    174:                                const char *name);
1.207     schwarze  175: static const char      *roff_getstrn(const struct roff *,
1.94      kristaps  176:                                const char *, size_t);
1.271     schwarze  177: static int              roff_hasregn(const struct roff *,
                    178:                                const char *, size_t);
1.251     schwarze  179: static enum rofferr     roff_insec(ROFF_ARGS);
1.178     schwarze  180: static enum rofferr     roff_it(ROFF_ARGS);
1.103     kristaps  181: static enum rofferr     roff_line_ignore(ROFF_ARGS);
1.265     schwarze  182: static void             roff_man_alloc1(struct roff_man *);
                    183: static void             roff_man_free1(struct roff_man *);
1.300     schwarze  184: static enum rofferr     roff_manyarg(ROFF_ARGS);
1.89      kristaps  185: static enum rofferr     roff_nr(ROFF_ARGS);
1.297     schwarze  186: static enum rofferr     roff_onearg(ROFF_ARGS);
1.294     schwarze  187: static enum roff_tok    roff_parse(struct roff *, char *, int *,
1.214     schwarze  188:                                int, int);
1.238     schwarze  189: static enum rofferr     roff_parsetext(struct buf *, int, int *);
                    190: static enum rofferr     roff_res(struct roff *, struct buf *, int, int);
1.122     schwarze  191: static enum rofferr     roff_rm(ROFF_ARGS);
1.203     schwarze  192: static enum rofferr     roff_rr(ROFF_ARGS);
1.94      kristaps  193: static void             roff_setstr(struct roff *,
1.106     kristaps  194:                                const char *, const char *, int);
1.207     schwarze  195: static void             roff_setstrn(struct roffkv **, const char *,
1.164     kristaps  196:                                size_t, const char *, size_t, int);
1.105     kristaps  197: static enum rofferr     roff_so(ROFF_ARGS);
1.164     kristaps  198: static enum rofferr     roff_tr(ROFF_ARGS);
1.175     schwarze  199: static enum rofferr     roff_Dd(ROFF_ARGS);
                    200: static enum rofferr     roff_TH(ROFF_ARGS);
1.109     kristaps  201: static enum rofferr     roff_TE(ROFF_ARGS);
                    202: static enum rofferr     roff_TS(ROFF_ARGS);
1.125     kristaps  203: static enum rofferr     roff_EQ(ROFF_ARGS);
                    204: static enum rofferr     roff_EN(ROFF_ARGS);
1.112     kristaps  205: static enum rofferr     roff_T_(ROFF_ARGS);
1.251     schwarze  206: static enum rofferr     roff_unsupp(ROFF_ARGS);
1.106     kristaps  207: static enum rofferr     roff_userdef(ROFF_ARGS);
1.67      kristaps  208:
1.266     schwarze  209: /* --- constant data ------------------------------------------------------ */
                    210:
1.261     schwarze  211: #define        ROFFNUM_SCALE   (1 << 0)  /* Honour scaling in roff_getnum(). */
                    212: #define        ROFFNUM_WHITE   (1 << 1)  /* Skip whitespace in roff_evalnum(). */
                    213:
1.294     schwarze  214: const char *__roff_name[MAN_MAX + 1] = {
1.299     schwarze  215:        "br",           "ft",           "ll",           "sp",
1.301   ! schwarze  216:        "ta",           "ti",           NULL,
1.294     schwarze  217:        "ab",           "ad",           "af",           "aln",
                    218:        "als",          "am",           "am1",          "ami",
                    219:        "ami1",         "as",           "as1",          "asciify",
                    220:        "backtrace",    "bd",           "bleedat",      "blm",
                    221:         "box",         "boxa",         "bp",           "BP",
                    222:        "break",        "breakchar",    "brnl",         "brp",
                    223:        "brpnl",        "c2",           "cc",           "ce",
                    224:        "cf",           "cflags",       "ch",           "char",
                    225:        "chop",         "class",        "close",        "CL",
                    226:        "color",        "composite",    "continue",     "cp",
                    227:        "cropat",       "cs",           "cu",           "da",
                    228:        "dch",          "Dd",           "de",           "de1",
                    229:        "defcolor",     "dei",          "dei1",         "device",
                    230:        "devicem",      "di",           "do",           "ds",
                    231:        "ds1",          "dwh",          "dt",           "ec",
                    232:        "ecr",          "ecs",          "el",           "em",
                    233:        "EN",           "eo",           "EP",           "EQ",
                    234:        "errprint",     "ev",           "evc",          "ex",
                    235:        "fallback",     "fam",          "fc",           "fchar",
                    236:        "fcolor",       "fdeferlig",    "feature",      "fkern",
                    237:        "fl",           "flig",         "fp",           "fps",
                    238:        "fschar",       "fspacewidth",  "fspecial",     "ftr",
                    239:        "fzoom",        "gcolor",       "hc",           "hcode",
                    240:        "hidechar",     "hla",          "hlm",          "hpf",
                    241:        "hpfa",         "hpfcode",      "hw",           "hy",
                    242:        "hylang",       "hylen",        "hym",          "hypp",
                    243:        "hys",          "ie",           "if",           "ig",
                    244:        "index",        "it",           "itc",          "IX",
                    245:        "kern",         "kernafter",    "kernbefore",   "kernpair",
                    246:        "lc",           "lc_ctype",     "lds",          "length",
                    247:        "letadj",       "lf",           "lg",           "lhang",
                    248:        "linetabs",     "lnr",          "lnrf",         "lpfx",
                    249:        "ls",           "lsm",          "lt",           "mc",
                    250:        "mediasize",    "minss",        "mk",           "mso",
                    251:        "na",           "ne",           "nh",           "nhychar",
                    252:        "nm",           "nn",           "nop",          "nr",
                    253:        "nrf",          "nroff",        "ns",           "nx",
                    254:        "open",         "opena",        "os",           "output",
                    255:        "padj",         "papersize",    "pc",           "pev",
                    256:        "pi",           "PI",           "pl",           "pm",
                    257:        "pn",           "pnr",          "po",           "ps",
                    258:        "psbb",         "pshape",       "pso",          "ptr",
                    259:        "pvs",          "rchar",        "rd",           "recursionlimit",
                    260:        "return",       "rfschar",      "rhang",        "rj",
                    261:        "rm",           "rn",           "rnn",          "rr",
                    262:        "rs",           "rt",           "schar",        "sentchar",
                    263:        "shc",          "shift",        "sizes",        "so",
                    264:        "spacewidth",   "special",      "spreadwarn",   "ss",
                    265:        "sty",          "substring",    "sv",           "sy",
1.300     schwarze  266:        "T&",           "tc",           "TE",
1.301   ! schwarze  267:        "TH",           "tkf",          "tl",
1.294     schwarze  268:        "tm",           "tm1",          "tmc",          "tr",
                    269:        "track",        "transchar",    "trf",          "trimat",
                    270:        "trin",         "trnt",         "troff",        "TS",
                    271:        "uf",           "ul",           "unformat",     "unwatch",
                    272:        "unwatchn",     "vpt",          "vs",           "warn",
                    273:        "warnscale",    "watch",        "watchlength",  "watchn",
                    274:        "wh",           "while",        "write",        "writec",
                    275:        "writem",       "xflag",        ".",            NULL,
                    276:        "text",
                    277:        "Dd",           "Dt",           "Os",           "Sh",
                    278:        "Ss",           "Pp",           "D1",           "Dl",
                    279:        "Bd",           "Ed",           "Bl",           "El",
                    280:        "It",           "Ad",           "An",           "Ap",
                    281:        "Ar",           "Cd",           "Cm",           "Dv",
                    282:        "Er",           "Ev",           "Ex",           "Fa",
                    283:        "Fd",           "Fl",           "Fn",           "Ft",
                    284:        "Ic",           "In",           "Li",           "Nd",
                    285:        "Nm",           "Op",           "Ot",           "Pa",
                    286:        "Rv",           "St",           "Va",           "Vt",
                    287:        "Xr",           "%A",           "%B",           "%D",
                    288:        "%I",           "%J",           "%N",           "%O",
                    289:        "%P",           "%R",           "%T",           "%V",
                    290:        "Ac",           "Ao",           "Aq",           "At",
                    291:        "Bc",           "Bf",           "Bo",           "Bq",
                    292:        "Bsx",          "Bx",           "Db",           "Dc",
                    293:        "Do",           "Dq",           "Ec",           "Ef",
                    294:        "Em",           "Eo",           "Fx",           "Ms",
                    295:        "No",           "Ns",           "Nx",           "Ox",
                    296:        "Pc",           "Pf",           "Po",           "Pq",
                    297:        "Qc",           "Ql",           "Qo",           "Qq",
                    298:        "Re",           "Rs",           "Sc",           "So",
                    299:        "Sq",           "Sm",           "Sx",           "Sy",
                    300:        "Tn",           "Ux",           "Xc",           "Xo",
                    301:        "Fo",           "Fc",           "Oo",           "Oc",
                    302:        "Bk",           "Ek",           "Bt",           "Hf",
                    303:        "Fr",           "Ud",           "Lb",           "Lp",
                    304:        "Lk",           "Mt",           "Brq",          "Bro",
                    305:        "Brc",          "%C",           "Es",           "En",
1.299     schwarze  306:        "Dx",           "%Q",           "%U",           "Ta",
                    307:        NULL,
1.294     schwarze  308:        "TH",           "SH",           "SS",           "TP",
                    309:        "LP",           "PP",           "P",            "IP",
                    310:        "HP",           "SM",           "SB",           "BI",
                    311:        "IB",           "BR",           "RB",           "R",
                    312:        "B",            "I",            "IR",           "RI",
1.299     schwarze  313:        "nf",           "fi",
1.294     schwarze  314:        "RE",           "RS",           "DT",           "UC",
1.297     schwarze  315:        "PD",           "AT",           "in",
1.294     schwarze  316:        "OP",           "EX",           "EE",           "UR",
1.298     schwarze  317:        "UE",           NULL
1.294     schwarze  318: };
                    319: const  char *const *roff_name = __roff_name;
                    320:
                    321: static struct roffmac   roffs[TOKEN_NONE] = {
1.296     schwarze  322:        { roff_br, NULL, NULL, 0 },  /* br */
1.297     schwarze  323:        { roff_onearg, NULL, NULL, 0 },  /* ft */
1.298     schwarze  324:        { roff_onearg, NULL, NULL, 0 },  /* ll */
1.299     schwarze  325:        { roff_onearg, NULL, NULL, 0 },  /* sp */
1.300     schwarze  326:        { roff_manyarg, NULL, NULL, 0 },  /* ta */
1.301   ! schwarze  327:        { roff_onearg, NULL, NULL, 0 },  /* ti */
1.296     schwarze  328:        { NULL, NULL, NULL, 0 },  /* ROFF_MAX */
1.295     schwarze  329:        { roff_unsupp, NULL, NULL, 0 },  /* ab */
                    330:        { roff_line_ignore, NULL, NULL, 0 },  /* ad */
                    331:        { roff_line_ignore, NULL, NULL, 0 },  /* af */
                    332:        { roff_unsupp, NULL, NULL, 0 },  /* aln */
                    333:        { roff_unsupp, NULL, NULL, 0 },  /* als */
                    334:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* am */
                    335:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* am1 */
                    336:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* ami */
                    337:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* ami1 */
                    338:        { roff_ds, NULL, NULL, 0 },  /* as */
                    339:        { roff_ds, NULL, NULL, 0 },  /* as1 */
                    340:        { roff_unsupp, NULL, NULL, 0 },  /* asciify */
                    341:        { roff_line_ignore, NULL, NULL, 0 },  /* backtrace */
                    342:        { roff_line_ignore, NULL, NULL, 0 },  /* bd */
                    343:        { roff_line_ignore, NULL, NULL, 0 },  /* bleedat */
                    344:        { roff_unsupp, NULL, NULL, 0 },  /* blm */
                    345:        { roff_unsupp, NULL, NULL, 0 },  /* box */
                    346:        { roff_unsupp, NULL, NULL, 0 },  /* boxa */
                    347:        { roff_line_ignore, NULL, NULL, 0 },  /* bp */
                    348:        { roff_unsupp, NULL, NULL, 0 },  /* BP */
                    349:        { roff_unsupp, NULL, NULL, 0 },  /* break */
                    350:        { roff_line_ignore, NULL, NULL, 0 },  /* breakchar */
                    351:        { roff_line_ignore, NULL, NULL, 0 },  /* brnl */
1.296     schwarze  352:        { roff_br, NULL, NULL, 0 },  /* brp */
1.295     schwarze  353:        { roff_line_ignore, NULL, NULL, 0 },  /* brpnl */
                    354:        { roff_unsupp, NULL, NULL, 0 },  /* c2 */
                    355:        { roff_cc, NULL, NULL, 0 },  /* cc */
                    356:        { roff_line_ignore, NULL, NULL, 0 },  /* ce */
                    357:        { roff_insec, NULL, NULL, 0 },  /* cf */
                    358:        { roff_line_ignore, NULL, NULL, 0 },  /* cflags */
                    359:        { roff_line_ignore, NULL, NULL, 0 },  /* ch */
                    360:        { roff_unsupp, NULL, NULL, 0 },  /* char */
                    361:        { roff_unsupp, NULL, NULL, 0 },  /* chop */
                    362:        { roff_line_ignore, NULL, NULL, 0 },  /* class */
                    363:        { roff_insec, NULL, NULL, 0 },  /* close */
                    364:        { roff_unsupp, NULL, NULL, 0 },  /* CL */
                    365:        { roff_line_ignore, NULL, NULL, 0 },  /* color */
                    366:        { roff_unsupp, NULL, NULL, 0 },  /* composite */
                    367:        { roff_unsupp, NULL, NULL, 0 },  /* continue */
                    368:        { roff_line_ignore, NULL, NULL, 0 },  /* cp */
                    369:        { roff_line_ignore, NULL, NULL, 0 },  /* cropat */
                    370:        { roff_line_ignore, NULL, NULL, 0 },  /* cs */
                    371:        { roff_line_ignore, NULL, NULL, 0 },  /* cu */
                    372:        { roff_unsupp, NULL, NULL, 0 },  /* da */
                    373:        { roff_unsupp, NULL, NULL, 0 },  /* dch */
                    374:        { roff_Dd, NULL, NULL, 0 },  /* Dd */
                    375:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* de */
                    376:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* de1 */
                    377:        { roff_line_ignore, NULL, NULL, 0 },  /* defcolor */
                    378:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* dei */
                    379:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* dei1 */
                    380:        { roff_unsupp, NULL, NULL, 0 },  /* device */
                    381:        { roff_unsupp, NULL, NULL, 0 },  /* devicem */
                    382:        { roff_unsupp, NULL, NULL, 0 },  /* di */
                    383:        { roff_unsupp, NULL, NULL, 0 },  /* do */
                    384:        { roff_ds, NULL, NULL, 0 },  /* ds */
                    385:        { roff_ds, NULL, NULL, 0 },  /* ds1 */
                    386:        { roff_unsupp, NULL, NULL, 0 },  /* dwh */
                    387:        { roff_unsupp, NULL, NULL, 0 },  /* dt */
                    388:        { roff_unsupp, NULL, NULL, 0 },  /* ec */
                    389:        { roff_unsupp, NULL, NULL, 0 },  /* ecr */
                    390:        { roff_unsupp, NULL, NULL, 0 },  /* ecs */
                    391:        { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT },  /* el */
                    392:        { roff_unsupp, NULL, NULL, 0 },  /* em */
                    393:        { roff_EN, NULL, NULL, 0 },  /* EN */
                    394:        { roff_unsupp, NULL, NULL, 0 },  /* eo */
                    395:        { roff_unsupp, NULL, NULL, 0 },  /* EP */
                    396:        { roff_EQ, NULL, NULL, 0 },  /* EQ */
                    397:        { roff_line_ignore, NULL, NULL, 0 },  /* errprint */
                    398:        { roff_unsupp, NULL, NULL, 0 },  /* ev */
                    399:        { roff_unsupp, NULL, NULL, 0 },  /* evc */
                    400:        { roff_unsupp, NULL, NULL, 0 },  /* ex */
                    401:        { roff_line_ignore, NULL, NULL, 0 },  /* fallback */
                    402:        { roff_line_ignore, NULL, NULL, 0 },  /* fam */
                    403:        { roff_unsupp, NULL, NULL, 0 },  /* fc */
                    404:        { roff_unsupp, NULL, NULL, 0 },  /* fchar */
                    405:        { roff_line_ignore, NULL, NULL, 0 },  /* fcolor */
                    406:        { roff_line_ignore, NULL, NULL, 0 },  /* fdeferlig */
                    407:        { roff_line_ignore, NULL, NULL, 0 },  /* feature */
                    408:        { roff_line_ignore, NULL, NULL, 0 },  /* fkern */
                    409:        { roff_line_ignore, NULL, NULL, 0 },  /* fl */
                    410:        { roff_line_ignore, NULL, NULL, 0 },  /* flig */
                    411:        { roff_line_ignore, NULL, NULL, 0 },  /* fp */
                    412:        { roff_line_ignore, NULL, NULL, 0 },  /* fps */
                    413:        { roff_unsupp, NULL, NULL, 0 },  /* fschar */
                    414:        { roff_line_ignore, NULL, NULL, 0 },  /* fspacewidth */
                    415:        { roff_line_ignore, NULL, NULL, 0 },  /* fspecial */
                    416:        { roff_line_ignore, NULL, NULL, 0 },  /* ftr */
                    417:        { roff_line_ignore, NULL, NULL, 0 },  /* fzoom */
                    418:        { roff_line_ignore, NULL, NULL, 0 },  /* gcolor */
                    419:        { roff_line_ignore, NULL, NULL, 0 },  /* hc */
                    420:        { roff_line_ignore, NULL, NULL, 0 },  /* hcode */
                    421:        { roff_line_ignore, NULL, NULL, 0 },  /* hidechar */
                    422:        { roff_line_ignore, NULL, NULL, 0 },  /* hla */
                    423:        { roff_line_ignore, NULL, NULL, 0 },  /* hlm */
                    424:        { roff_line_ignore, NULL, NULL, 0 },  /* hpf */
                    425:        { roff_line_ignore, NULL, NULL, 0 },  /* hpfa */
                    426:        { roff_line_ignore, NULL, NULL, 0 },  /* hpfcode */
                    427:        { roff_line_ignore, NULL, NULL, 0 },  /* hw */
                    428:        { roff_line_ignore, NULL, NULL, 0 },  /* hy */
                    429:        { roff_line_ignore, NULL, NULL, 0 },  /* hylang */
                    430:        { roff_line_ignore, NULL, NULL, 0 },  /* hylen */
                    431:        { roff_line_ignore, NULL, NULL, 0 },  /* hym */
                    432:        { roff_line_ignore, NULL, NULL, 0 },  /* hypp */
                    433:        { roff_line_ignore, NULL, NULL, 0 },  /* hys */
                    434:        { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT },  /* ie */
                    435:        { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT },  /* if */
                    436:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* ig */
                    437:        { roff_unsupp, NULL, NULL, 0 },  /* index */
                    438:        { roff_it, NULL, NULL, 0 },  /* it */
                    439:        { roff_unsupp, NULL, NULL, 0 },  /* itc */
                    440:        { roff_line_ignore, NULL, NULL, 0 },  /* IX */
                    441:        { roff_line_ignore, NULL, NULL, 0 },  /* kern */
                    442:        { roff_line_ignore, NULL, NULL, 0 },  /* kernafter */
                    443:        { roff_line_ignore, NULL, NULL, 0 },  /* kernbefore */
                    444:        { roff_line_ignore, NULL, NULL, 0 },  /* kernpair */
                    445:        { roff_unsupp, NULL, NULL, 0 },  /* lc */
                    446:        { roff_unsupp, NULL, NULL, 0 },  /* lc_ctype */
                    447:        { roff_unsupp, NULL, NULL, 0 },  /* lds */
                    448:        { roff_unsupp, NULL, NULL, 0 },  /* length */
                    449:        { roff_line_ignore, NULL, NULL, 0 },  /* letadj */
                    450:        { roff_insec, NULL, NULL, 0 },  /* lf */
                    451:        { roff_line_ignore, NULL, NULL, 0 },  /* lg */
                    452:        { roff_line_ignore, NULL, NULL, 0 },  /* lhang */
                    453:        { roff_unsupp, NULL, NULL, 0 },  /* linetabs */
                    454:        { roff_unsupp, NULL, NULL, 0 },  /* lnr */
                    455:        { roff_unsupp, NULL, NULL, 0 },  /* lnrf */
                    456:        { roff_unsupp, NULL, NULL, 0 },  /* lpfx */
                    457:        { roff_line_ignore, NULL, NULL, 0 },  /* ls */
                    458:        { roff_unsupp, NULL, NULL, 0 },  /* lsm */
                    459:        { roff_line_ignore, NULL, NULL, 0 },  /* lt */
                    460:        { roff_line_ignore, NULL, NULL, 0 },  /* mc */
                    461:        { roff_line_ignore, NULL, NULL, 0 },  /* mediasize */
                    462:        { roff_line_ignore, NULL, NULL, 0 },  /* minss */
                    463:        { roff_line_ignore, NULL, NULL, 0 },  /* mk */
                    464:        { roff_insec, NULL, NULL, 0 },  /* mso */
                    465:        { roff_line_ignore, NULL, NULL, 0 },  /* na */
                    466:        { roff_line_ignore, NULL, NULL, 0 },  /* ne */
                    467:        { roff_line_ignore, NULL, NULL, 0 },  /* nh */
                    468:        { roff_line_ignore, NULL, NULL, 0 },  /* nhychar */
                    469:        { roff_unsupp, NULL, NULL, 0 },  /* nm */
                    470:        { roff_unsupp, NULL, NULL, 0 },  /* nn */
                    471:        { roff_unsupp, NULL, NULL, 0 },  /* nop */
                    472:        { roff_nr, NULL, NULL, 0 },  /* nr */
                    473:        { roff_unsupp, NULL, NULL, 0 },  /* nrf */
                    474:        { roff_line_ignore, NULL, NULL, 0 },  /* nroff */
                    475:        { roff_line_ignore, NULL, NULL, 0 },  /* ns */
                    476:        { roff_insec, NULL, NULL, 0 },  /* nx */
                    477:        { roff_insec, NULL, NULL, 0 },  /* open */
                    478:        { roff_insec, NULL, NULL, 0 },  /* opena */
                    479:        { roff_line_ignore, NULL, NULL, 0 },  /* os */
                    480:        { roff_unsupp, NULL, NULL, 0 },  /* output */
                    481:        { roff_line_ignore, NULL, NULL, 0 },  /* padj */
                    482:        { roff_line_ignore, NULL, NULL, 0 },  /* papersize */
                    483:        { roff_line_ignore, NULL, NULL, 0 },  /* pc */
                    484:        { roff_line_ignore, NULL, NULL, 0 },  /* pev */
                    485:        { roff_insec, NULL, NULL, 0 },  /* pi */
                    486:        { roff_unsupp, NULL, NULL, 0 },  /* PI */
                    487:        { roff_line_ignore, NULL, NULL, 0 },  /* pl */
                    488:        { roff_line_ignore, NULL, NULL, 0 },  /* pm */
                    489:        { roff_line_ignore, NULL, NULL, 0 },  /* pn */
                    490:        { roff_line_ignore, NULL, NULL, 0 },  /* pnr */
                    491:        { roff_line_ignore, NULL, NULL, 0 },  /* po */
                    492:        { roff_line_ignore, NULL, NULL, 0 },  /* ps */
                    493:        { roff_unsupp, NULL, NULL, 0 },  /* psbb */
                    494:        { roff_unsupp, NULL, NULL, 0 },  /* pshape */
                    495:        { roff_insec, NULL, NULL, 0 },  /* pso */
                    496:        { roff_line_ignore, NULL, NULL, 0 },  /* ptr */
                    497:        { roff_line_ignore, NULL, NULL, 0 },  /* pvs */
                    498:        { roff_unsupp, NULL, NULL, 0 },  /* rchar */
                    499:        { roff_line_ignore, NULL, NULL, 0 },  /* rd */
                    500:        { roff_line_ignore, NULL, NULL, 0 },  /* recursionlimit */
                    501:        { roff_unsupp, NULL, NULL, 0 },  /* return */
                    502:        { roff_unsupp, NULL, NULL, 0 },  /* rfschar */
                    503:        { roff_line_ignore, NULL, NULL, 0 },  /* rhang */
                    504:        { roff_line_ignore, NULL, NULL, 0 },  /* rj */
                    505:        { roff_rm, NULL, NULL, 0 },  /* rm */
                    506:        { roff_unsupp, NULL, NULL, 0 },  /* rn */
                    507:        { roff_unsupp, NULL, NULL, 0 },  /* rnn */
                    508:        { roff_rr, NULL, NULL, 0 },  /* rr */
                    509:        { roff_line_ignore, NULL, NULL, 0 },  /* rs */
                    510:        { roff_line_ignore, NULL, NULL, 0 },  /* rt */
                    511:        { roff_unsupp, NULL, NULL, 0 },  /* schar */
                    512:        { roff_line_ignore, NULL, NULL, 0 },  /* sentchar */
                    513:        { roff_line_ignore, NULL, NULL, 0 },  /* shc */
                    514:        { roff_unsupp, NULL, NULL, 0 },  /* shift */
                    515:        { roff_line_ignore, NULL, NULL, 0 },  /* sizes */
                    516:        { roff_so, NULL, NULL, 0 },  /* so */
                    517:        { roff_line_ignore, NULL, NULL, 0 },  /* spacewidth */
                    518:        { roff_line_ignore, NULL, NULL, 0 },  /* special */
                    519:        { roff_line_ignore, NULL, NULL, 0 },  /* spreadwarn */
                    520:        { roff_line_ignore, NULL, NULL, 0 },  /* ss */
                    521:        { roff_line_ignore, NULL, NULL, 0 },  /* sty */
                    522:        { roff_unsupp, NULL, NULL, 0 },  /* substring */
                    523:        { roff_line_ignore, NULL, NULL, 0 },  /* sv */
                    524:        { roff_insec, NULL, NULL, 0 },  /* sy */
                    525:        { roff_T_, NULL, NULL, 0 },  /* T& */
                    526:        { roff_unsupp, NULL, NULL, 0 },  /* tc */
                    527:        { roff_TE, NULL, NULL, 0 },  /* TE */
                    528:        { roff_TH, NULL, NULL, 0 },  /* TH */
                    529:        { roff_line_ignore, NULL, NULL, 0 },  /* tkf */
                    530:        { roff_unsupp, NULL, NULL, 0 },  /* tl */
                    531:        { roff_line_ignore, NULL, NULL, 0 },  /* tm */
                    532:        { roff_line_ignore, NULL, NULL, 0 },  /* tm1 */
                    533:        { roff_line_ignore, NULL, NULL, 0 },  /* tmc */
                    534:        { roff_tr, NULL, NULL, 0 },  /* tr */
                    535:        { roff_line_ignore, NULL, NULL, 0 },  /* track */
                    536:        { roff_line_ignore, NULL, NULL, 0 },  /* transchar */
                    537:        { roff_insec, NULL, NULL, 0 },  /* trf */
                    538:        { roff_line_ignore, NULL, NULL, 0 },  /* trimat */
                    539:        { roff_unsupp, NULL, NULL, 0 },  /* trin */
                    540:        { roff_unsupp, NULL, NULL, 0 },  /* trnt */
                    541:        { roff_line_ignore, NULL, NULL, 0 },  /* troff */
                    542:        { roff_TS, NULL, NULL, 0 },  /* TS */
                    543:        { roff_line_ignore, NULL, NULL, 0 },  /* uf */
                    544:        { roff_line_ignore, NULL, NULL, 0 },  /* ul */
                    545:        { roff_unsupp, NULL, NULL, 0 },  /* unformat */
                    546:        { roff_line_ignore, NULL, NULL, 0 },  /* unwatch */
                    547:        { roff_line_ignore, NULL, NULL, 0 },  /* unwatchn */
                    548:        { roff_line_ignore, NULL, NULL, 0 },  /* vpt */
                    549:        { roff_line_ignore, NULL, NULL, 0 },  /* vs */
                    550:        { roff_line_ignore, NULL, NULL, 0 },  /* warn */
                    551:        { roff_line_ignore, NULL, NULL, 0 },  /* warnscale */
                    552:        { roff_line_ignore, NULL, NULL, 0 },  /* watch */
                    553:        { roff_line_ignore, NULL, NULL, 0 },  /* watchlength */
                    554:        { roff_line_ignore, NULL, NULL, 0 },  /* watchn */
                    555:        { roff_unsupp, NULL, NULL, 0 },  /* wh */
                    556:        { roff_unsupp, NULL, NULL, 0 },  /* while */
                    557:        { roff_insec, NULL, NULL, 0 },  /* write */
                    558:        { roff_insec, NULL, NULL, 0 },  /* writec */
                    559:        { roff_insec, NULL, NULL, 0 },  /* writem */
                    560:        { roff_line_ignore, NULL, NULL, 0 },  /* xflag */
                    561:        { roff_cblock, NULL, NULL, 0 },  /* . */
                    562:        { roff_userdef, NULL, NULL, 0 }
1.67      kristaps  563: };
                    564:
1.200     schwarze  565: /* not currently implemented: Ds em Eq LP Me PP pp Or Rd Sf SH */
1.175     schwarze  566: const  char *const __mdoc_reserved[] = {
                    567:        "Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At",
                    568:        "Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq",
                    569:        "Brc", "Bro", "Brq", "Bsx", "Bt", "Bx",
                    570:        "Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq",
1.200     schwarze  571:        "Dt", "Dv", "Dx", "D1",
                    572:        "Ec", "Ed", "Ef", "Ek", "El", "Em",
                    573:        "En", "Eo", "Er", "Es", "Ev", "Ex",
1.175     schwarze  574:        "Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",
1.200     schwarze  575:        "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp",
                    576:        "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
1.175     schwarze  577:        "Oc", "Oo", "Op", "Os", "Ot", "Ox",
1.200     schwarze  578:        "Pa", "Pc", "Pf", "Po", "Pp", "Pq",
                    579:        "Qc", "Ql", "Qo", "Qq", "Re", "Rs", "Rv",
                    580:        "Sc", "Sh", "Sm", "So", "Sq",
1.175     schwarze  581:        "Ss", "St", "Sx", "Sy",
                    582:        "Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",
1.200     schwarze  583:        "%A", "%B", "%C", "%D", "%I", "%J", "%N", "%O",
1.175     schwarze  584:        "%P", "%Q", "%R", "%T", "%U", "%V",
                    585:        NULL
                    586: };
                    587:
1.200     schwarze  588: /* not currently implemented: BT DE DS ME MT PT SY TQ YS */
1.175     schwarze  589: const  char *const __man_reserved[] = {
1.200     schwarze  590:        "AT", "B", "BI", "BR", "DT",
                    591:        "EE", "EN", "EQ", "EX", "HP", "I", "IB", "IP", "IR",
                    592:        "LP", "OP", "P", "PD", "PP",
                    593:        "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS",
                    594:        "TE", "TH", "TP", "TS", "T&", "UC", "UE", "UR",
1.175     schwarze  595:        NULL
                    596: };
                    597:
1.141     kristaps  598: /* Array of injected predefined strings. */
                    599: #define        PREDEFS_MAX      38
                    600: static const struct predef predefs[PREDEFS_MAX] = {
                    601: #include "predefs.in"
                    602: };
                    603:
1.178     schwarze  604: static int      roffit_lines;  /* number of lines to delay */
                    605: static char    *roffit_macro;  /* nil-terminated macro line */
                    606:
1.207     schwarze  607:
1.266     schwarze  608: /* --- request table ------------------------------------------------------ */
                    609:
1.295     schwarze  610: struct ohash *
                    611: roffhash_alloc(enum roff_tok mintok, enum roff_tok maxtok)
1.85      kristaps  612: {
1.295     schwarze  613:        struct ohash    *htab;
                    614:        struct roffreq  *req;
                    615:        enum roff_tok    tok;
                    616:        size_t           sz;
                    617:        unsigned int     slot;
1.85      kristaps  618:
1.295     schwarze  619:        htab = mandoc_malloc(sizeof(*htab));
                    620:        mandoc_ohash_init(htab, 8, offsetof(struct roffreq, name));
1.85      kristaps  621:
1.295     schwarze  622:        for (tok = mintok; tok < maxtok; tok++) {
1.296     schwarze  623:                if (roff_name[tok] == NULL)
                    624:                        continue;
1.295     schwarze  625:                sz = strlen(roff_name[tok]);
                    626:                req = mandoc_malloc(sizeof(*req) + sz + 1);
                    627:                req->tok = tok;
                    628:                memcpy(req->name, roff_name[tok], sz + 1);
                    629:                slot = ohash_qlookup(htab, req->name);
                    630:                ohash_insert(htab, slot, req);
1.85      kristaps  631:        }
1.295     schwarze  632:        return htab;
1.85      kristaps  633: }
                    634:
1.295     schwarze  635: void
                    636: roffhash_free(struct ohash *htab)
1.67      kristaps  637: {
1.295     schwarze  638:        struct roffreq  *req;
                    639:        unsigned int     slot;
1.67      kristaps  640:
1.295     schwarze  641:        if (htab == NULL)
                    642:                return;
                    643:        for (req = ohash_first(htab, &slot); req != NULL;
                    644:             req = ohash_next(htab, &slot))
                    645:                free(req);
                    646:        ohash_delete(htab);
                    647:        free(htab);
                    648: }
                    649:
                    650: enum roff_tok
                    651: roffhash_find(struct ohash *htab, const char *name, size_t sz)
                    652: {
                    653:        struct roffreq  *req;
                    654:        const char      *end;
                    655:
                    656:        if (sz) {
                    657:                end = name + sz;
                    658:                req = ohash_find(htab, ohash_qlookupi(htab, name, &end));
                    659:        } else
                    660:                req = ohash_find(htab, ohash_qlookup(htab, name));
                    661:        return req == NULL ? TOKEN_NONE : req->tok;
1.67      kristaps  662: }
                    663:
1.266     schwarze  664: /* --- stack of request blocks -------------------------------------------- */
                    665:
1.67      kristaps  666: /*
                    667:  * Pop the current node off of the stack of roff instructions currently
                    668:  * pending.
                    669:  */
                    670: static void
                    671: roffnode_pop(struct roff *r)
                    672: {
                    673:        struct roffnode *p;
                    674:
1.75      kristaps  675:        assert(r->last);
1.207     schwarze  676:        p = r->last;
1.82      kristaps  677:
1.75      kristaps  678:        r->last = r->last->parent;
1.106     kristaps  679:        free(p->name);
                    680:        free(p->end);
1.67      kristaps  681:        free(p);
                    682: }
                    683:
                    684: /*
                    685:  * Push a roff node onto the instruction stack.  This must later be
                    686:  * removed with roffnode_pop().
                    687:  */
1.98      schwarze  688: static void
1.294     schwarze  689: roffnode_push(struct roff *r, enum roff_tok tok, const char *name,
1.106     kristaps  690:                int line, int col)
1.67      kristaps  691: {
                    692:        struct roffnode *p;
                    693:
1.98      schwarze  694:        p = mandoc_calloc(1, sizeof(struct roffnode));
1.67      kristaps  695:        p->tok = tok;
1.106     kristaps  696:        if (name)
                    697:                p->name = mandoc_strdup(name);
1.67      kristaps  698:        p->parent = r->last;
                    699:        p->line = line;
                    700:        p->col = col;
1.198     schwarze  701:        p->rule = p->parent ? p->parent->rule : 0;
1.67      kristaps  702:
                    703:        r->last = p;
                    704: }
                    705:
1.266     schwarze  706: /* --- roff parser state data management ---------------------------------- */
                    707:
1.67      kristaps  708: static void
                    709: roff_free1(struct roff *r)
                    710: {
1.176     schwarze  711:        struct tbl_node *tbl;
1.125     kristaps  712:        struct eqn_node *e;
1.167     kristaps  713:        int              i;
1.67      kristaps  714:
1.176     schwarze  715:        while (NULL != (tbl = r->first_tbl)) {
                    716:                r->first_tbl = tbl->next;
                    717:                tbl_free(tbl);
1.109     kristaps  718:        }
1.113     kristaps  719:        r->first_tbl = r->last_tbl = r->tbl = NULL;
                    720:
1.125     kristaps  721:        while (NULL != (e = r->first_eqn)) {
                    722:                r->first_eqn = e->next;
                    723:                eqn_free(e);
                    724:        }
                    725:        r->first_eqn = r->last_eqn = r->eqn = NULL;
                    726:
1.67      kristaps  727:        while (r->last)
                    728:                roffnode_pop(r);
1.109     kristaps  729:
1.223     schwarze  730:        free (r->rstack);
                    731:        r->rstack = NULL;
                    732:        r->rstacksz = 0;
                    733:        r->rstackpos = -1;
                    734:
                    735:        roff_freereg(r->regtab);
                    736:        r->regtab = NULL;
                    737:
1.167     kristaps  738:        roff_freestr(r->strtab);
                    739:        roff_freestr(r->xmbtab);
                    740:        r->strtab = r->xmbtab = NULL;
                    741:
                    742:        if (r->xtab)
                    743:                for (i = 0; i < 128; i++)
                    744:                        free(r->xtab[i].p);
                    745:        free(r->xtab);
                    746:        r->xtab = NULL;
1.67      kristaps  747: }
                    748:
                    749: void
                    750: roff_reset(struct roff *r)
                    751: {
                    752:        roff_free1(r);
1.227     schwarze  753:        r->format = r->options & (MPARSE_MDOC | MPARSE_MAN);
1.174     kristaps  754:        r->control = 0;
1.67      kristaps  755: }
                    756:
                    757: void
                    758: roff_free(struct roff *r)
                    759: {
                    760:        roff_free1(r);
1.295     schwarze  761:        roffhash_free(r->reqtab);
1.67      kristaps  762:        free(r);
                    763: }
                    764:
                    765: struct roff *
1.279     schwarze  766: roff_alloc(struct mparse *parse, int options)
1.67      kristaps  767: {
                    768:        struct roff     *r;
                    769:
1.98      schwarze  770:        r = mandoc_calloc(1, sizeof(struct roff));
1.128     kristaps  771:        r->parse = parse;
1.295     schwarze  772:        r->reqtab = roffhash_alloc(0, ROFF_USERDEF);
1.199     schwarze  773:        r->options = options;
1.227     schwarze  774:        r->format = options & (MPARSE_MDOC | MPARSE_MAN);
1.82      kristaps  775:        r->rstackpos = -1;
1.277     schwarze  776:        return r;
1.265     schwarze  777: }
                    778:
1.266     schwarze  779: /* --- syntax tree state data management ---------------------------------- */
                    780:
1.265     schwarze  781: static void
                    782: roff_man_free1(struct roff_man *man)
                    783: {
                    784:
1.266     schwarze  785:        if (man->first != NULL)
                    786:                roff_node_delete(man, man->first);
1.265     schwarze  787:        free(man->meta.msec);
                    788:        free(man->meta.vol);
                    789:        free(man->meta.os);
                    790:        free(man->meta.arch);
                    791:        free(man->meta.title);
                    792:        free(man->meta.name);
                    793:        free(man->meta.date);
                    794: }
                    795:
                    796: static void
                    797: roff_man_alloc1(struct roff_man *man)
                    798: {
                    799:
                    800:        memset(&man->meta, 0, sizeof(man->meta));
                    801:        man->first = mandoc_calloc(1, sizeof(*man->first));
                    802:        man->first->type = ROFFT_ROOT;
                    803:        man->last = man->first;
                    804:        man->last_es = NULL;
                    805:        man->flags = 0;
                    806:        man->macroset = MACROSET_NONE;
                    807:        man->lastsec = man->lastnamed = SEC_NONE;
                    808:        man->next = ROFF_NEXT_CHILD;
                    809: }
                    810:
                    811: void
                    812: roff_man_reset(struct roff_man *man)
                    813: {
                    814:
                    815:        roff_man_free1(man);
                    816:        roff_man_alloc1(man);
                    817: }
                    818:
                    819: void
                    820: roff_man_free(struct roff_man *man)
                    821: {
                    822:
                    823:        roff_man_free1(man);
                    824:        free(man);
                    825: }
                    826:
                    827: struct roff_man *
                    828: roff_man_alloc(struct roff *roff, struct mparse *parse,
                    829:        const char *defos, int quick)
                    830: {
                    831:        struct roff_man *man;
                    832:
                    833:        man = mandoc_calloc(1, sizeof(*man));
                    834:        man->parse = parse;
                    835:        man->roff = roff;
                    836:        man->defos = defos;
                    837:        man->quick = quick;
                    838:        roff_man_alloc1(man);
1.296     schwarze  839:        roff->man = man;
1.277     schwarze  840:        return man;
1.67      kristaps  841: }
                    842:
1.266     schwarze  843: /* --- syntax tree handling ----------------------------------------------- */
                    844:
                    845: struct roff_node *
                    846: roff_node_alloc(struct roff_man *man, int line, int pos,
                    847:        enum roff_type type, int tok)
                    848: {
                    849:        struct roff_node        *n;
                    850:
                    851:        n = mandoc_calloc(1, sizeof(*n));
                    852:        n->line = line;
                    853:        n->pos = pos;
                    854:        n->tok = tok;
                    855:        n->type = type;
                    856:        n->sec = man->lastsec;
                    857:
                    858:        if (man->flags & MDOC_SYNOPSIS)
1.285     schwarze  859:                n->flags |= NODE_SYNPRETTY;
1.266     schwarze  860:        else
1.285     schwarze  861:                n->flags &= ~NODE_SYNPRETTY;
1.266     schwarze  862:        if (man->flags & MDOC_NEWLINE)
1.285     schwarze  863:                n->flags |= NODE_LINE;
1.266     schwarze  864:        man->flags &= ~MDOC_NEWLINE;
                    865:
1.277     schwarze  866:        return n;
1.266     schwarze  867: }
                    868:
                    869: void
                    870: roff_node_append(struct roff_man *man, struct roff_node *n)
                    871: {
                    872:
                    873:        switch (man->next) {
                    874:        case ROFF_NEXT_SIBLING:
1.281     schwarze  875:                if (man->last->next != NULL) {
                    876:                        n->next = man->last->next;
                    877:                        man->last->next->prev = n;
                    878:                } else
                    879:                        man->last->parent->last = n;
1.266     schwarze  880:                man->last->next = n;
                    881:                n->prev = man->last;
                    882:                n->parent = man->last->parent;
                    883:                break;
                    884:        case ROFF_NEXT_CHILD:
1.287     schwarze  885:                if (man->last->child != NULL) {
                    886:                        n->next = man->last->child;
                    887:                        man->last->child->prev = n;
                    888:                } else
                    889:                        man->last->last = n;
1.266     schwarze  890:                man->last->child = n;
                    891:                n->parent = man->last;
                    892:                break;
                    893:        default:
                    894:                abort();
                    895:        }
1.282     schwarze  896:        man->last = n;
1.266     schwarze  897:
                    898:        switch (n->type) {
                    899:        case ROFFT_HEAD:
                    900:                n->parent->head = n;
                    901:                break;
                    902:        case ROFFT_BODY:
1.282     schwarze  903:                if (n->end != ENDBODY_NOT)
                    904:                        return;
1.266     schwarze  905:                n->parent->body = n;
                    906:                break;
                    907:        case ROFFT_TAIL:
                    908:                n->parent->tail = n;
                    909:                break;
                    910:        default:
1.282     schwarze  911:                return;
1.266     schwarze  912:        }
1.282     schwarze  913:
                    914:        /*
                    915:         * Copy over the normalised-data pointer of our parent.  Not
                    916:         * everybody has one, but copying a null pointer is fine.
                    917:         */
                    918:
                    919:        n->norm = n->parent->norm;
                    920:        assert(n->parent->type == ROFFT_BLOCK);
1.266     schwarze  921: }
                    922:
1.267     schwarze  923: void
                    924: roff_word_alloc(struct roff_man *man, int line, int pos, const char *word)
                    925: {
                    926:        struct roff_node        *n;
                    927:
                    928:        n = roff_node_alloc(man, line, pos, ROFFT_TEXT, TOKEN_NONE);
                    929:        n->string = roff_strdup(man->roff, word);
                    930:        roff_node_append(man, n);
1.286     schwarze  931:        n->flags |= NODE_VALID | NODE_ENDED;
1.267     schwarze  932:        man->next = ROFF_NEXT_SIBLING;
                    933: }
                    934:
                    935: void
                    936: roff_word_append(struct roff_man *man, const char *word)
                    937: {
                    938:        struct roff_node        *n;
                    939:        char                    *addstr, *newstr;
                    940:
                    941:        n = man->last;
                    942:        addstr = roff_strdup(man->roff, word);
                    943:        mandoc_asprintf(&newstr, "%s %s", n->string, addstr);
                    944:        free(addstr);
                    945:        free(n->string);
                    946:        n->string = newstr;
                    947:        man->next = ROFF_NEXT_SIBLING;
1.268     schwarze  948: }
                    949:
                    950: void
                    951: roff_elem_alloc(struct roff_man *man, int line, int pos, int tok)
                    952: {
                    953:        struct roff_node        *n;
                    954:
                    955:        n = roff_node_alloc(man, line, pos, ROFFT_ELEM, tok);
                    956:        roff_node_append(man, n);
                    957:        man->next = ROFF_NEXT_CHILD;
                    958: }
                    959:
                    960: struct roff_node *
                    961: roff_block_alloc(struct roff_man *man, int line, int pos, int tok)
                    962: {
                    963:        struct roff_node        *n;
                    964:
                    965:        n = roff_node_alloc(man, line, pos, ROFFT_BLOCK, tok);
                    966:        roff_node_append(man, n);
                    967:        man->next = ROFF_NEXT_CHILD;
1.277     schwarze  968:        return n;
1.267     schwarze  969: }
                    970:
1.266     schwarze  971: struct roff_node *
                    972: roff_head_alloc(struct roff_man *man, int line, int pos, int tok)
                    973: {
                    974:        struct roff_node        *n;
                    975:
                    976:        n = roff_node_alloc(man, line, pos, ROFFT_HEAD, tok);
                    977:        roff_node_append(man, n);
                    978:        man->next = ROFF_NEXT_CHILD;
1.277     schwarze  979:        return n;
1.266     schwarze  980: }
                    981:
                    982: struct roff_node *
                    983: roff_body_alloc(struct roff_man *man, int line, int pos, int tok)
                    984: {
                    985:        struct roff_node        *n;
                    986:
                    987:        n = roff_node_alloc(man, line, pos, ROFFT_BODY, tok);
                    988:        roff_node_append(man, n);
                    989:        man->next = ROFF_NEXT_CHILD;
1.277     schwarze  990:        return n;
1.267     schwarze  991: }
                    992:
                    993: void
                    994: roff_addeqn(struct roff_man *man, const struct eqn *eqn)
                    995: {
                    996:        struct roff_node        *n;
                    997:
                    998:        n = roff_node_alloc(man, eqn->ln, eqn->pos, ROFFT_EQN, TOKEN_NONE);
                    999:        n->eqn = eqn;
                   1000:        if (eqn->ln > man->last->line)
1.285     schwarze 1001:                n->flags |= NODE_LINE;
1.267     schwarze 1002:        roff_node_append(man, n);
                   1003:        man->next = ROFF_NEXT_SIBLING;
                   1004: }
                   1005:
                   1006: void
                   1007: roff_addtbl(struct roff_man *man, const struct tbl_span *tbl)
                   1008: {
                   1009:        struct roff_node        *n;
                   1010:
                   1011:        if (man->macroset == MACROSET_MAN)
                   1012:                man_breakscope(man, TOKEN_NONE);
                   1013:        n = roff_node_alloc(man, tbl->line, 0, ROFFT_TBL, TOKEN_NONE);
                   1014:        n->span = tbl;
                   1015:        roff_node_append(man, n);
1.286     schwarze 1016:        n->flags |= NODE_VALID | NODE_ENDED;
1.267     schwarze 1017:        man->next = ROFF_NEXT_SIBLING;
1.266     schwarze 1018: }
                   1019:
                   1020: void
                   1021: roff_node_unlink(struct roff_man *man, struct roff_node *n)
                   1022: {
                   1023:
                   1024:        /* Adjust siblings. */
                   1025:
                   1026:        if (n->prev)
                   1027:                n->prev->next = n->next;
                   1028:        if (n->next)
                   1029:                n->next->prev = n->prev;
                   1030:
                   1031:        /* Adjust parent. */
                   1032:
                   1033:        if (n->parent != NULL) {
                   1034:                if (n->parent->child == n)
                   1035:                        n->parent->child = n->next;
                   1036:                if (n->parent->last == n)
                   1037:                        n->parent->last = n->prev;
                   1038:        }
                   1039:
                   1040:        /* Adjust parse point. */
                   1041:
                   1042:        if (man == NULL)
                   1043:                return;
                   1044:        if (man->last == n) {
                   1045:                if (n->prev == NULL) {
                   1046:                        man->last = n->parent;
                   1047:                        man->next = ROFF_NEXT_CHILD;
                   1048:                } else {
                   1049:                        man->last = n->prev;
                   1050:                        man->next = ROFF_NEXT_SIBLING;
                   1051:                }
                   1052:        }
                   1053:        if (man->first == n)
                   1054:                man->first = NULL;
                   1055: }
                   1056:
                   1057: void
                   1058: roff_node_free(struct roff_node *n)
                   1059: {
                   1060:
                   1061:        if (n->args != NULL)
                   1062:                mdoc_argv_free(n->args);
                   1063:        if (n->type == ROFFT_BLOCK || n->type == ROFFT_ELEM)
                   1064:                free(n->norm);
                   1065:        free(n->string);
                   1066:        free(n);
                   1067: }
                   1068:
                   1069: void
                   1070: roff_node_delete(struct roff_man *man, struct roff_node *n)
                   1071: {
                   1072:
                   1073:        while (n->child != NULL)
                   1074:                roff_node_delete(man, n->child);
                   1075:        roff_node_unlink(man, n);
                   1076:        roff_node_free(n);
1.269     schwarze 1077: }
                   1078:
                   1079: void
                   1080: deroff(char **dest, const struct roff_node *n)
                   1081: {
                   1082:        char    *cp;
                   1083:        size_t   sz;
                   1084:
                   1085:        if (n->type != ROFFT_TEXT) {
                   1086:                for (n = n->child; n != NULL; n = n->next)
                   1087:                        deroff(dest, n);
                   1088:                return;
                   1089:        }
                   1090:
1.288     schwarze 1091:        /* Skip leading whitespace. */
1.269     schwarze 1092:
1.288     schwarze 1093:        for (cp = n->string; *cp != '\0'; cp++) {
1.289     schwarze 1094:                if (cp[0] == '\\' && cp[1] != '\0' &&
                   1095:                    strchr(" %&0^|~", cp[1]) != NULL)
1.269     schwarze 1096:                        cp++;
1.288     schwarze 1097:                else if ( ! isspace((unsigned char)*cp))
1.269     schwarze 1098:                        break;
                   1099:        }
                   1100:
1.289     schwarze 1101:        /* Skip trailing backslash. */
                   1102:
                   1103:        sz = strlen(cp);
1.290     schwarze 1104:        if (sz > 0 && cp[sz - 1] == '\\')
1.289     schwarze 1105:                sz--;
                   1106:
1.269     schwarze 1107:        /* Skip trailing whitespace. */
                   1108:
1.289     schwarze 1109:        for (; sz; sz--)
1.269     schwarze 1110:                if ( ! isspace((unsigned char)cp[sz-1]))
                   1111:                        break;
                   1112:
                   1113:        /* Skip empty strings. */
                   1114:
                   1115:        if (sz == 0)
                   1116:                return;
                   1117:
                   1118:        if (*dest == NULL) {
                   1119:                *dest = mandoc_strndup(cp, sz);
                   1120:                return;
                   1121:        }
                   1122:
                   1123:        mandoc_asprintf(&cp, "%s %*s", *dest, (int)sz, cp);
                   1124:        free(*dest);
                   1125:        *dest = cp;
1.266     schwarze 1126: }
                   1127:
                   1128: /* --- main functions of the roff parser ---------------------------------- */
                   1129:
1.94      kristaps 1130: /*
1.206     schwarze 1131:  * In the current line, expand escape sequences that tend to get
                   1132:  * used in numerical expressions and conditional requests.
                   1133:  * Also check the syntax of the remaining escape sequences.
1.154     kristaps 1134:  */
1.172     schwarze 1135: static enum rofferr
1.238     schwarze 1136: roff_res(struct roff *r, struct buf *buf, int ln, int pos)
1.94      kristaps 1137: {
1.208     schwarze 1138:        char             ubuf[24]; /* buffer to print the number */
1.205     schwarze 1139:        const char      *start; /* start of the string to process */
1.209     schwarze 1140:        char            *stesc; /* start of an escape sequence ('\\') */
1.108     schwarze 1141:        const char      *stnam; /* start of the name, after "[(*" */
                   1142:        const char      *cp;    /* end of the name, e.g. before ']' */
                   1143:        const char      *res;   /* the string to be substituted */
1.238     schwarze 1144:        char            *nbuf;  /* new buffer to copy buf->buf to */
1.181     schwarze 1145:        size_t           maxl;  /* expected length of the escape name */
                   1146:        size_t           naml;  /* actual length of the escape name */
1.237     schwarze 1147:        enum mandoc_esc  esc;   /* type of the escape sequence */
                   1148:        int              inaml; /* length returned from mandoc_escape() */
1.181     schwarze 1149:        int              expand_count;  /* to avoid infinite loops */
1.206     schwarze 1150:        int              npos;  /* position in numeric expression */
1.218     schwarze 1151:        int              arg_complete; /* argument not interrupted by eol */
1.206     schwarze 1152:        char             term;  /* character terminating the escape */
1.94      kristaps 1153:
1.170     schwarze 1154:        expand_count = 0;
1.238     schwarze 1155:        start = buf->buf + pos;
1.205     schwarze 1156:        stesc = strchr(start, '\0') - 1;
                   1157:        while (stesc-- > start) {
1.170     schwarze 1158:
1.205     schwarze 1159:                /* Search backwards for the next backslash. */
                   1160:
1.238     schwarze 1161:                if (*stesc != '\\')
1.205     schwarze 1162:                        continue;
                   1163:
                   1164:                /* If it is escaped, skip it. */
                   1165:
                   1166:                for (cp = stesc - 1; cp >= start; cp--)
1.238     schwarze 1167:                        if (*cp != '\\')
1.205     schwarze 1168:                                break;
                   1169:
1.238     schwarze 1170:                if ((stesc - cp) % 2 == 0) {
1.209     schwarze 1171:                        stesc = (char *)cp;
1.205     schwarze 1172:                        continue;
                   1173:                }
1.108     schwarze 1174:
1.206     schwarze 1175:                /* Decide whether to expand or to check only. */
1.108     schwarze 1176:
1.206     schwarze 1177:                term = '\0';
1.205     schwarze 1178:                cp = stesc + 1;
1.181     schwarze 1179:                switch (*cp) {
1.207     schwarze 1180:                case '*':
1.181     schwarze 1181:                        res = NULL;
                   1182:                        break;
1.207     schwarze 1183:                case 'B':
                   1184:                case 'w':
1.206     schwarze 1185:                        term = cp[1];
                   1186:                        /* FALLTHROUGH */
1.207     schwarze 1187:                case 'n':
1.181     schwarze 1188:                        res = ubuf;
                   1189:                        break;
                   1190:                default:
1.237     schwarze 1191:                        esc = mandoc_escape(&cp, &stnam, &inaml);
                   1192:                        if (esc == ESCAPE_ERROR ||
                   1193:                            (esc == ESCAPE_SPECIAL &&
1.279     schwarze 1194:                             mchars_spec2cp(stnam, inaml) < 0))
1.219     schwarze 1195:                                mandoc_vmsg(MANDOCERR_ESC_BAD,
1.238     schwarze 1196:                                    r->parse, ln, (int)(stesc - buf->buf),
1.219     schwarze 1197:                                    "%.*s", (int)(cp - stesc), stesc);
1.205     schwarze 1198:                        continue;
1.152     kristaps 1199:                }
                   1200:
1.205     schwarze 1201:                if (EXPAND_LIMIT < ++expand_count) {
                   1202:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
1.238     schwarze 1203:                            ln, (int)(stesc - buf->buf), NULL);
1.277     schwarze 1204:                        return ROFF_IGN;
1.205     schwarze 1205:                }
1.108     schwarze 1206:
                   1207:                /*
                   1208:                 * The third character decides the length
1.181     schwarze 1209:                 * of the name of the string or register.
1.108     schwarze 1210:                 * Save a pointer to the name.
                   1211:                 */
                   1212:
1.238     schwarze 1213:                if (term == '\0') {
1.206     schwarze 1214:                        switch (*++cp) {
1.207     schwarze 1215:                        case '\0':
1.206     schwarze 1216:                                maxl = 0;
                   1217:                                break;
1.207     schwarze 1218:                        case '(':
1.206     schwarze 1219:                                cp++;
                   1220:                                maxl = 2;
                   1221:                                break;
1.207     schwarze 1222:                        case '[':
1.206     schwarze 1223:                                cp++;
                   1224:                                term = ']';
                   1225:                                maxl = 0;
                   1226:                                break;
                   1227:                        default:
                   1228:                                maxl = 1;
                   1229:                                break;
                   1230:                        }
                   1231:                } else {
                   1232:                        cp += 2;
1.94      kristaps 1233:                        maxl = 0;
                   1234:                }
1.108     schwarze 1235:                stnam = cp;
1.94      kristaps 1236:
1.108     schwarze 1237:                /* Advance to the end of the name. */
1.94      kristaps 1238:
1.253     schwarze 1239:                naml = 0;
1.218     schwarze 1240:                arg_complete = 1;
1.253     schwarze 1241:                while (maxl == 0 || naml < maxl) {
1.238     schwarze 1242:                        if (*cp == '\0') {
1.219     schwarze 1243:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 1244:                                    ln, (int)(stesc - buf->buf), stesc);
1.218     schwarze 1245:                                arg_complete = 0;
1.206     schwarze 1246:                                break;
1.153     kristaps 1247:                        }
1.238     schwarze 1248:                        if (maxl == 0 && *cp == term) {
1.206     schwarze 1249:                                cp++;
1.253     schwarze 1250:                                break;
                   1251:                        }
                   1252:                        if (*cp++ != '\\' || stesc[1] != 'w') {
                   1253:                                naml++;
                   1254:                                continue;
                   1255:                        }
                   1256:                        switch (mandoc_escape(&cp, NULL, NULL)) {
                   1257:                        case ESCAPE_SPECIAL:
                   1258:                        case ESCAPE_UNICODE:
                   1259:                        case ESCAPE_NUMBERED:
                   1260:                        case ESCAPE_OVERSTRIKE:
                   1261:                                naml++;
                   1262:                                break;
                   1263:                        default:
1.94      kristaps 1264:                                break;
1.206     schwarze 1265:                        }
1.94      kristaps 1266:                }
                   1267:
1.108     schwarze 1268:                /*
                   1269:                 * Retrieve the replacement string; if it is
                   1270:                 * undefined, resume searching for escapes.
                   1271:                 */
                   1272:
1.206     schwarze 1273:                switch (stesc[1]) {
1.207     schwarze 1274:                case '*':
1.218     schwarze 1275:                        if (arg_complete)
                   1276:                                res = roff_getstrn(r, stnam, naml);
1.206     schwarze 1277:                        break;
1.207     schwarze 1278:                case 'B':
1.206     schwarze 1279:                        npos = 0;
1.218     schwarze 1280:                        ubuf[0] = arg_complete &&
1.261     schwarze 1281:                            roff_evalnum(r, ln, stnam, &npos,
                   1282:                              NULL, ROFFNUM_SCALE) &&
1.218     schwarze 1283:                            stnam + npos + 1 == cp ? '1' : '0';
1.206     schwarze 1284:                        ubuf[1] = '\0';
                   1285:                        break;
1.207     schwarze 1286:                case 'n':
1.218     schwarze 1287:                        if (arg_complete)
                   1288:                                (void)snprintf(ubuf, sizeof(ubuf), "%d",
                   1289:                                    roff_getregn(r, stnam, naml));
                   1290:                        else
                   1291:                                ubuf[0] = '\0';
1.206     schwarze 1292:                        break;
1.207     schwarze 1293:                case 'w':
1.218     schwarze 1294:                        /* use even incomplete args */
1.208     schwarze 1295:                        (void)snprintf(ubuf, sizeof(ubuf), "%d",
1.206     schwarze 1296:                            24 * (int)naml);
                   1297:                        break;
                   1298:                }
1.94      kristaps 1299:
1.238     schwarze 1300:                if (res == NULL) {
1.219     schwarze 1301:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1302:                            r->parse, ln, (int)(stesc - buf->buf),
1.219     schwarze 1303:                            "%.*s", (int)naml, stnam);
1.142     kristaps 1304:                        res = "";
1.246     schwarze 1305:                } else if (buf->sz + strlen(res) > SHRT_MAX) {
                   1306:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
                   1307:                            ln, (int)(stesc - buf->buf), NULL);
1.277     schwarze 1308:                        return ROFF_IGN;
1.94      kristaps 1309:                }
                   1310:
1.108     schwarze 1311:                /* Replace the escape sequence by the string. */
                   1312:
1.209     schwarze 1313:                *stesc = '\0';
1.238     schwarze 1314:                buf->sz = mandoc_asprintf(&nbuf, "%s%s%s",
                   1315:                    buf->buf, res, cp) + 1;
1.94      kristaps 1316:
1.205     schwarze 1317:                /* Prepare for the next replacement. */
1.94      kristaps 1318:
1.205     schwarze 1319:                start = nbuf + pos;
1.238     schwarze 1320:                stesc = nbuf + (stesc - buf->buf) + strlen(res);
                   1321:                free(buf->buf);
                   1322:                buf->buf = nbuf;
1.154     kristaps 1323:        }
1.277     schwarze 1324:        return ROFF_CONT;
1.154     kristaps 1325: }
                   1326:
                   1327: /*
1.275     schwarze 1328:  * Process text streams.
1.154     kristaps 1329:  */
                   1330: static enum rofferr
1.238     schwarze 1331: roff_parsetext(struct buf *buf, int pos, int *offs)
1.154     kristaps 1332: {
                   1333:        size_t           sz;
                   1334:        const char      *start;
1.178     schwarze 1335:        char            *p;
                   1336:        int              isz;
1.154     kristaps 1337:        enum mandoc_esc  esc;
                   1338:
1.275     schwarze 1339:        /* Spring the input line trap. */
                   1340:
                   1341:        if (roffit_lines == 1) {
                   1342:                isz = mandoc_asprintf(&p, "%s\n.%s", buf->buf, roffit_macro);
                   1343:                free(buf->buf);
                   1344:                buf->buf = p;
                   1345:                buf->sz = isz + 1;
                   1346:                *offs = 0;
                   1347:                free(roffit_macro);
                   1348:                roffit_lines = 0;
1.277     schwarze 1349:                return ROFF_REPARSE;
1.275     schwarze 1350:        } else if (roffit_lines > 1)
                   1351:                --roffit_lines;
                   1352:
                   1353:        /* Convert all breakable hyphens into ASCII_HYPH. */
                   1354:
1.238     schwarze 1355:        start = p = buf->buf + pos;
1.154     kristaps 1356:
1.238     schwarze 1357:        while (*p != '\0') {
1.154     kristaps 1358:                sz = strcspn(p, "-\\");
                   1359:                p += sz;
                   1360:
1.238     schwarze 1361:                if (*p == '\0')
1.159     kristaps 1362:                        break;
                   1363:
1.238     schwarze 1364:                if (*p == '\\') {
1.154     kristaps 1365:                        /* Skip over escapes. */
                   1366:                        p++;
1.189     schwarze 1367:                        esc = mandoc_escape((const char **)&p, NULL, NULL);
1.238     schwarze 1368:                        if (esc == ESCAPE_ERROR)
1.154     kristaps 1369:                                break;
1.264     schwarze 1370:                        while (*p == '-')
                   1371:                                p++;
1.155     kristaps 1372:                        continue;
1.159     kristaps 1373:                } else if (p == start) {
1.158     kristaps 1374:                        p++;
1.155     kristaps 1375:                        continue;
1.158     kristaps 1376:                }
1.155     kristaps 1377:
1.171     schwarze 1378:                if (isalpha((unsigned char)p[-1]) &&
                   1379:                    isalpha((unsigned char)p[1]))
1.155     kristaps 1380:                        *p = ASCII_HYPH;
                   1381:                p++;
1.94      kristaps 1382:        }
1.277     schwarze 1383:        return ROFF_CONT;
1.94      kristaps 1384: }
                   1385:
1.67      kristaps 1386: enum rofferr
1.238     schwarze 1387: roff_parseln(struct roff *r, int ln, struct buf *buf, int *offs)
1.67      kristaps 1388: {
1.294     schwarze 1389:        enum roff_tok    t;
1.109     kristaps 1390:        enum rofferr     e;
1.238     schwarze 1391:        int              pos;   /* parse point */
1.243     schwarze 1392:        int              spos;  /* saved parse point for messages */
1.238     schwarze 1393:        int              ppos;  /* original offset in buf->buf */
                   1394:        int              ctl;   /* macro line (boolean) */
                   1395:
                   1396:        ppos = pos = *offs;
1.79      kristaps 1397:
1.230     schwarze 1398:        /* Handle in-line equation delimiters. */
                   1399:
1.236     schwarze 1400:        if (r->tbl == NULL &&
                   1401:            r->last_eqn != NULL && r->last_eqn->delim &&
1.230     schwarze 1402:            (r->eqn == NULL || r->eqn_inline)) {
1.238     schwarze 1403:                e = roff_eqndelim(r, buf, pos);
1.230     schwarze 1404:                if (e == ROFF_REPARSE)
1.277     schwarze 1405:                        return e;
1.230     schwarze 1406:                assert(e == ROFF_CONT);
                   1407:        }
                   1408:
                   1409:        /* Expand some escape sequences. */
1.94      kristaps 1410:
1.238     schwarze 1411:        e = roff_res(r, buf, ln, pos);
                   1412:        if (e == ROFF_IGN)
1.277     schwarze 1413:                return e;
1.238     schwarze 1414:        assert(e == ROFF_CONT);
1.94      kristaps 1415:
1.238     schwarze 1416:        ctl = roff_getcontrol(r, buf->buf, &pos);
1.130     kristaps 1417:
1.94      kristaps 1418:        /*
1.79      kristaps 1419:         * First, if a scope is open and we're not a macro, pass the
1.252     schwarze 1420:         * text through the macro's filter.
                   1421:         * Equations process all content themselves.
                   1422:         * Tables process almost all content themselves, but we want
                   1423:         * to warn about macros before passing it there.
1.79      kristaps 1424:         */
1.74      kristaps 1425:
1.252     schwarze 1426:        if (r->last != NULL && ! ctl) {
1.78      kristaps 1427:                t = r->last->tok;
1.238     schwarze 1428:                e = (*roffs[t].text)(r, t, buf, ln, pos, pos, offs);
1.294     schwarze 1429:                if (e == ROFF_IGN)
1.277     schwarze 1430:                        return e;
1.294     schwarze 1431:                assert(e == ROFF_CONT);
1.182     schwarze 1432:        }
1.252     schwarze 1433:        if (r->eqn != NULL)
1.277     schwarze 1434:                return eqn_read(&r->eqn, ln, buf->buf, ppos, offs);
1.252     schwarze 1435:        if (r->tbl != NULL && ( ! ctl || buf->buf[pos] == '\0'))
1.277     schwarze 1436:                return tbl_read(r->tbl, ln, buf->buf, ppos);
1.252     schwarze 1437:        if ( ! ctl)
1.277     schwarze 1438:                return roff_parsetext(buf, pos, offs);
1.228     schwarze 1439:
                   1440:        /* Skip empty request lines. */
                   1441:
1.238     schwarze 1442:        if (buf->buf[pos] == '"') {
1.228     schwarze 1443:                mandoc_msg(MANDOCERR_COMMENT_BAD, r->parse,
                   1444:                    ln, pos, NULL);
1.277     schwarze 1445:                return ROFF_IGN;
1.238     schwarze 1446:        } else if (buf->buf[pos] == '\0')
1.277     schwarze 1447:                return ROFF_IGN;
1.67      kristaps 1448:
1.79      kristaps 1449:        /*
                   1450:         * If a scope is open, go to the child handler for that macro,
                   1451:         * as it may want to preprocess before doing anything with it.
1.125     kristaps 1452:         * Don't do so if an equation is open.
1.79      kristaps 1453:         */
1.78      kristaps 1454:
1.79      kristaps 1455:        if (r->last) {
                   1456:                t = r->last->tok;
1.277     schwarze 1457:                return (*roffs[t].sub)(r, t, buf, ln, ppos, pos, offs);
1.79      kristaps 1458:        }
1.78      kristaps 1459:
1.243     schwarze 1460:        /* No scope is open.  This is a new request or macro. */
                   1461:
                   1462:        spos = pos;
                   1463:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
                   1464:
                   1465:        /* Tables ignore most macros. */
                   1466:
1.294     schwarze 1467:        if (r->tbl != NULL && (t == TOKEN_NONE || t == ROFF_TS)) {
1.243     schwarze 1468:                mandoc_msg(MANDOCERR_TBLMACRO, r->parse,
                   1469:                    ln, pos, buf->buf + spos);
1.257     schwarze 1470:                if (t == ROFF_TS)
1.277     schwarze 1471:                        return ROFF_IGN;
1.257     schwarze 1472:                while (buf->buf[pos] != '\0' && buf->buf[pos] != ' ')
                   1473:                        pos++;
1.291     schwarze 1474:                while (buf->buf[pos] == ' ')
1.257     schwarze 1475:                        pos++;
1.277     schwarze 1476:                return tbl_read(r->tbl, ln, buf->buf, pos);
1.243     schwarze 1477:        }
                   1478:
1.79      kristaps 1479:        /*
1.243     schwarze 1480:         * This is neither a roff request nor a user-defined macro.
                   1481:         * Let the standard macro set parsers handle it.
1.79      kristaps 1482:         */
1.67      kristaps 1483:
1.294     schwarze 1484:        if (t == TOKEN_NONE)
1.277     schwarze 1485:                return ROFF_CONT;
1.243     schwarze 1486:
                   1487:        /* Execute a roff request or a user defined macro. */
1.67      kristaps 1488:
1.296     schwarze 1489:        return (*roffs[t].proc)(r, t, buf, ln, spos, pos, offs);
1.74      kristaps 1490: }
                   1491:
1.117     kristaps 1492: void
1.74      kristaps 1493: roff_endparse(struct roff *r)
                   1494: {
                   1495:
1.110     kristaps 1496:        if (r->last)
1.221     schwarze 1497:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1498:                    r->last->line, r->last->col,
1.295     schwarze 1499:                    roff_name[r->last->tok]);
1.117     kristaps 1500:
1.125     kristaps 1501:        if (r->eqn) {
1.221     schwarze 1502:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1503:                    r->eqn->eqn.ln, r->eqn->eqn.pos, "EQ");
1.151     kristaps 1504:                eqn_end(&r->eqn);
1.125     kristaps 1505:        }
                   1506:
1.117     kristaps 1507:        if (r->tbl) {
1.221     schwarze 1508:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1509:                    r->tbl->line, r->tbl->pos, "TS");
1.151     kristaps 1510:                tbl_end(&r->tbl);
1.117     kristaps 1511:        }
1.67      kristaps 1512: }
                   1513:
                   1514: /*
                   1515:  * Parse a roff node's type from the input buffer.  This must be in the
                   1516:  * form of ".foo xxx" in the usual way.
                   1517:  */
1.294     schwarze 1518: static enum roff_tok
1.214     schwarze 1519: roff_parse(struct roff *r, char *buf, int *pos, int ln, int ppos)
1.67      kristaps 1520: {
1.214     schwarze 1521:        char            *cp;
1.106     kristaps 1522:        const char      *mac;
                   1523:        size_t           maclen;
1.294     schwarze 1524:        enum roff_tok    t;
1.67      kristaps 1525:
1.214     schwarze 1526:        cp = buf + *pos;
                   1527:
                   1528:        if ('\0' == *cp || '"' == *cp || '\t' == *cp || ' ' == *cp)
1.294     schwarze 1529:                return TOKEN_NONE;
1.67      kristaps 1530:
1.214     schwarze 1531:        mac = cp;
                   1532:        maclen = roff_getname(r, &cp, ln, ppos);
1.67      kristaps 1533:
1.106     kristaps 1534:        t = (r->current_string = roff_getstrn(r, mac, maclen))
1.295     schwarze 1535:            ? ROFF_USERDEF : roffhash_find(r->reqtab, mac, maclen);
1.67      kristaps 1536:
1.294     schwarze 1537:        if (t != TOKEN_NONE)
1.214     schwarze 1538:                *pos = cp - buf;
1.67      kristaps 1539:
1.277     schwarze 1540:        return t;
1.67      kristaps 1541: }
                   1542:
1.266     schwarze 1543: /* --- handling of request blocks ----------------------------------------- */
                   1544:
1.67      kristaps 1545: static enum rofferr
1.76      kristaps 1546: roff_cblock(ROFF_ARGS)
1.67      kristaps 1547: {
                   1548:
1.79      kristaps 1549:        /*
                   1550:         * A block-close `..' should only be invoked as a child of an
                   1551:         * ignore macro, otherwise raise a warning and just ignore it.
                   1552:         */
                   1553:
1.238     schwarze 1554:        if (r->last == NULL) {
1.221     schwarze 1555:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1556:                    ln, ppos, "..");
1.277     schwarze 1557:                return ROFF_IGN;
1.76      kristaps 1558:        }
1.67      kristaps 1559:
1.81      kristaps 1560:        switch (r->last->tok) {
1.207     schwarze 1561:        case ROFF_am:
1.220     schwarze 1562:                /* ROFF_am1 is remapped to ROFF_am in roff_block(). */
1.207     schwarze 1563:        case ROFF_ami:
                   1564:        case ROFF_de:
1.108     schwarze 1565:                /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
1.207     schwarze 1566:        case ROFF_dei:
                   1567:        case ROFF_ig:
1.81      kristaps 1568:                break;
                   1569:        default:
1.221     schwarze 1570:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1571:                    ln, ppos, "..");
1.277     schwarze 1572:                return ROFF_IGN;
1.76      kristaps 1573:        }
1.67      kristaps 1574:
1.238     schwarze 1575:        if (buf->buf[pos] != '\0')
1.217     schwarze 1576:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238     schwarze 1577:                    ".. %s", buf->buf + pos);
1.71      kristaps 1578:
                   1579:        roffnode_pop(r);
1.76      kristaps 1580:        roffnode_cleanscope(r);
1.277     schwarze 1581:        return ROFF_IGN;
1.71      kristaps 1582:
1.67      kristaps 1583: }
                   1584:
1.76      kristaps 1585: static void
                   1586: roffnode_cleanscope(struct roff *r)
1.67      kristaps 1587: {
                   1588:
1.76      kristaps 1589:        while (r->last) {
1.173     schwarze 1590:                if (--r->last->endspan != 0)
1.76      kristaps 1591:                        break;
                   1592:                roffnode_pop(r);
                   1593:        }
1.67      kristaps 1594: }
                   1595:
1.195     schwarze 1596: static void
                   1597: roff_ccond(struct roff *r, int ln, int ppos)
1.74      kristaps 1598: {
                   1599:
1.76      kristaps 1600:        if (NULL == r->last) {
1.221     schwarze 1601:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1602:                    ln, ppos, "\\}");
1.195     schwarze 1603:                return;
1.76      kristaps 1604:        }
                   1605:
1.82      kristaps 1606:        switch (r->last->tok) {
1.207     schwarze 1607:        case ROFF_el:
                   1608:        case ROFF_ie:
                   1609:        case ROFF_if:
1.82      kristaps 1610:                break;
                   1611:        default:
1.221     schwarze 1612:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1613:                    ln, ppos, "\\}");
1.195     schwarze 1614:                return;
1.75      kristaps 1615:        }
                   1616:
1.76      kristaps 1617:        if (r->last->endspan > -1) {
1.221     schwarze 1618:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1619:                    ln, ppos, "\\}");
1.195     schwarze 1620:                return;
1.76      kristaps 1621:        }
                   1622:
1.75      kristaps 1623:        roffnode_pop(r);
1.76      kristaps 1624:        roffnode_cleanscope(r);
1.195     schwarze 1625:        return;
1.76      kristaps 1626: }
                   1627:
                   1628: static enum rofferr
1.80      kristaps 1629: roff_block(ROFF_ARGS)
1.76      kristaps 1630: {
1.220     schwarze 1631:        const char      *name;
                   1632:        char            *iname, *cp;
1.213     schwarze 1633:        size_t           namesz;
1.106     kristaps 1634:
1.220     schwarze 1635:        /* Ignore groff compatibility mode for now. */
1.76      kristaps 1636:
1.238     schwarze 1637:        if (tok == ROFF_de1)
1.220     schwarze 1638:                tok = ROFF_de;
1.251     schwarze 1639:        else if (tok == ROFF_dei1)
                   1640:                tok = ROFF_dei;
1.238     schwarze 1641:        else if (tok == ROFF_am1)
1.220     schwarze 1642:                tok = ROFF_am;
1.251     schwarze 1643:        else if (tok == ROFF_ami1)
                   1644:                tok = ROFF_ami;
1.220     schwarze 1645:
                   1646:        /* Parse the macro name argument. */
                   1647:
1.238     schwarze 1648:        cp = buf->buf + pos;
                   1649:        if (tok == ROFF_ig) {
1.220     schwarze 1650:                iname = NULL;
                   1651:                namesz = 0;
                   1652:        } else {
                   1653:                iname = cp;
                   1654:                namesz = roff_getname(r, &cp, ln, ppos);
                   1655:                iname[namesz] = '\0';
                   1656:        }
1.107     kristaps 1657:
1.220     schwarze 1658:        /* Resolve the macro name argument if it is indirect. */
1.107     kristaps 1659:
1.238     schwarze 1660:        if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
                   1661:                if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.220     schwarze 1662:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1663:                            r->parse, ln, (int)(iname - buf->buf),
1.220     schwarze 1664:                            "%.*s", (int)namesz, iname);
                   1665:                        namesz = 0;
                   1666:                } else
                   1667:                        namesz = strlen(name);
                   1668:        } else
                   1669:                name = iname;
1.107     kristaps 1670:
1.238     schwarze 1671:        if (namesz == 0 && tok != ROFF_ig) {
1.220     schwarze 1672:                mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse,
1.295     schwarze 1673:                    ln, ppos, roff_name[tok]);
1.277     schwarze 1674:                return ROFF_IGN;
1.220     schwarze 1675:        }
1.80      kristaps 1676:
1.106     kristaps 1677:        roffnode_push(r, tok, name, ln, ppos);
                   1678:
                   1679:        /*
                   1680:         * At the beginning of a `de' macro, clear the existing string
                   1681:         * with the same name, if there is one.  New content will be
1.193     schwarze 1682:         * appended from roff_block_text() in multiline mode.
1.106     kristaps 1683:         */
1.107     kristaps 1684:
1.238     schwarze 1685:        if (tok == ROFF_de || tok == ROFF_dei)
1.213     schwarze 1686:                roff_setstrn(&r->strtab, name, namesz, "", 0, 0);
1.76      kristaps 1687:
1.238     schwarze 1688:        if (*cp == '\0')
1.277     schwarze 1689:                return ROFF_IGN;
1.78      kristaps 1690:
1.220     schwarze 1691:        /* Get the custom end marker. */
1.107     kristaps 1692:
1.220     schwarze 1693:        iname = cp;
1.213     schwarze 1694:        namesz = roff_getname(r, &cp, ln, ppos);
1.220     schwarze 1695:
                   1696:        /* Resolve the end marker if it is indirect. */
                   1697:
1.238     schwarze 1698:        if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
                   1699:                if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.220     schwarze 1700:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1701:                            r->parse, ln, (int)(iname - buf->buf),
1.220     schwarze 1702:                            "%.*s", (int)namesz, iname);
                   1703:                        namesz = 0;
                   1704:                } else
                   1705:                        namesz = strlen(name);
                   1706:        } else
                   1707:                name = iname;
                   1708:
1.213     schwarze 1709:        if (namesz)
                   1710:                r->last->end = mandoc_strndup(name, namesz);
1.78      kristaps 1711:
1.238     schwarze 1712:        if (*cp != '\0')
1.217     schwarze 1713:                mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
1.295     schwarze 1714:                    ln, pos, ".%s ... %s", roff_name[tok], cp);
1.74      kristaps 1715:
1.277     schwarze 1716:        return ROFF_IGN;
1.78      kristaps 1717: }
                   1718:
                   1719: static enum rofferr
1.80      kristaps 1720: roff_block_sub(ROFF_ARGS)
1.79      kristaps 1721: {
1.294     schwarze 1722:        enum roff_tok   t;
1.79      kristaps 1723:        int             i, j;
                   1724:
                   1725:        /*
                   1726:         * First check whether a custom macro exists at this level.  If
                   1727:         * it does, then check against it.  This is some of groff's
                   1728:         * stranger behaviours.  If we encountered a custom end-scope
                   1729:         * tag and that tag also happens to be a "real" macro, then we
                   1730:         * need to try interpreting it again as a real macro.  If it's
                   1731:         * not, then return ignore.  Else continue.
                   1732:         */
                   1733:
                   1734:        if (r->last->end) {
1.130     kristaps 1735:                for (i = pos, j = 0; r->last->end[j]; j++, i++)
1.238     schwarze 1736:                        if (buf->buf[i] != r->last->end[j])
1.79      kristaps 1737:                                break;
                   1738:
1.238     schwarze 1739:                if (r->last->end[j] == '\0' &&
                   1740:                    (buf->buf[i] == '\0' ||
                   1741:                     buf->buf[i] == ' ' ||
                   1742:                     buf->buf[i] == '\t')) {
1.79      kristaps 1743:                        roffnode_pop(r);
                   1744:                        roffnode_cleanscope(r);
                   1745:
1.238     schwarze 1746:                        while (buf->buf[i] == ' ' || buf->buf[i] == '\t')
1.130     kristaps 1747:                                i++;
                   1748:
                   1749:                        pos = i;
1.238     schwarze 1750:                        if (roff_parse(r, buf->buf, &pos, ln, ppos) !=
1.294     schwarze 1751:                            TOKEN_NONE)
1.277     schwarze 1752:                                return ROFF_RERUN;
                   1753:                        return ROFF_IGN;
1.79      kristaps 1754:                }
                   1755:        }
                   1756:
                   1757:        /*
                   1758:         * If we have no custom end-query or lookup failed, then try
                   1759:         * pulling it out of the hashtable.
                   1760:         */
                   1761:
1.238     schwarze 1762:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.79      kristaps 1763:
1.238     schwarze 1764:        if (t != ROFF_cblock) {
                   1765:                if (tok != ROFF_ig)
                   1766:                        roff_setstr(r, r->last->name, buf->buf + ppos, 2);
1.277     schwarze 1767:                return ROFF_IGN;
1.106     kristaps 1768:        }
1.79      kristaps 1769:
1.277     schwarze 1770:        return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
1.79      kristaps 1771: }
                   1772:
                   1773: static enum rofferr
1.80      kristaps 1774: roff_block_text(ROFF_ARGS)
1.78      kristaps 1775: {
                   1776:
1.238     schwarze 1777:        if (tok != ROFF_ig)
                   1778:                roff_setstr(r, r->last->name, buf->buf + pos, 2);
1.106     kristaps 1779:
1.277     schwarze 1780:        return ROFF_IGN;
1.78      kristaps 1781: }
                   1782:
                   1783: static enum rofferr
1.82      kristaps 1784: roff_cond_sub(ROFF_ARGS)
                   1785: {
1.294     schwarze 1786:        enum roff_tok    t;
1.139     kristaps 1787:        char            *ep;
1.198     schwarze 1788:        int              rr;
1.82      kristaps 1789:
                   1790:        rr = r->last->rule;
1.139     kristaps 1791:        roffnode_cleanscope(r);
1.238     schwarze 1792:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.82      kristaps 1793:
1.139     kristaps 1794:        /*
1.177     schwarze 1795:         * Fully handle known macros when they are structurally
                   1796:         * required or when the conditional evaluated to true.
1.87      kristaps 1797:         */
                   1798:
1.294     schwarze 1799:        if (t != TOKEN_NONE && (rr || roffs[t].flags & ROFFMAC_STRUCT))
1.277     schwarze 1800:                return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
1.144     kristaps 1801:
1.196     schwarze 1802:        /*
                   1803:         * If `\}' occurs on a macro line without a preceding macro,
                   1804:         * drop the line completely.
                   1805:         */
                   1806:
1.238     schwarze 1807:        ep = buf->buf + pos;
                   1808:        if (ep[0] == '\\' && ep[1] == '}')
1.198     schwarze 1809:                rr = 0;
1.196     schwarze 1810:
1.177     schwarze 1811:        /* Always check for the closing delimiter `\}'. */
1.144     kristaps 1812:
1.238     schwarze 1813:        while ((ep = strchr(ep, '\\')) != NULL) {
                   1814:                if (*(++ep) == '}') {
1.197     schwarze 1815:                        *ep = '&';
1.238     schwarze 1816:                        roff_ccond(r, ln, ep - buf->buf - 1);
1.197     schwarze 1817:                }
1.247     schwarze 1818:                if (*ep != '\0')
                   1819:                        ++ep;
1.177     schwarze 1820:        }
1.277     schwarze 1821:        return rr ? ROFF_CONT : ROFF_IGN;
1.82      kristaps 1822: }
                   1823:
                   1824: static enum rofferr
                   1825: roff_cond_text(ROFF_ARGS)
1.78      kristaps 1826: {
1.140     kristaps 1827:        char            *ep;
1.198     schwarze 1828:        int              rr;
1.82      kristaps 1829:
                   1830:        rr = r->last->rule;
1.140     kristaps 1831:        roffnode_cleanscope(r);
1.82      kristaps 1832:
1.238     schwarze 1833:        ep = buf->buf + pos;
                   1834:        while ((ep = strchr(ep, '\\')) != NULL) {
                   1835:                if (*(++ep) == '}') {
1.197     schwarze 1836:                        *ep = '&';
1.238     schwarze 1837:                        roff_ccond(r, ln, ep - buf->buf - 1);
1.197     schwarze 1838:                }
1.247     schwarze 1839:                if (*ep != '\0')
                   1840:                        ++ep;
1.78      kristaps 1841:        }
1.277     schwarze 1842:        return rr ? ROFF_CONT : ROFF_IGN;
1.74      kristaps 1843: }
                   1844:
1.266     schwarze 1845: /* --- handling of numeric and conditional expressions -------------------- */
                   1846:
1.204     schwarze 1847: /*
                   1848:  * Parse a single signed integer number.  Stop at the first non-digit.
                   1849:  * If there is at least one digit, return success and advance the
                   1850:  * parse point, else return failure and let the parse point unchanged.
                   1851:  * Ignore overflows, treat them just like the C language.
                   1852:  */
1.184     schwarze 1853: static int
1.261     schwarze 1854: roff_getnum(const char *v, int *pos, int *res, int flags)
1.184     schwarze 1855: {
1.261     schwarze 1856:        int      myres, scaled, n, p;
1.206     schwarze 1857:
                   1858:        if (NULL == res)
                   1859:                res = &myres;
1.184     schwarze 1860:
                   1861:        p = *pos;
                   1862:        n = v[p] == '-';
1.261     schwarze 1863:        if (n || v[p] == '+')
1.184     schwarze 1864:                p++;
                   1865:
1.261     schwarze 1866:        if (flags & ROFFNUM_WHITE)
                   1867:                while (isspace((unsigned char)v[p]))
                   1868:                        p++;
                   1869:
1.184     schwarze 1870:        for (*res = 0; isdigit((unsigned char)v[p]); p++)
1.204     schwarze 1871:                *res = 10 * *res + v[p] - '0';
1.184     schwarze 1872:        if (p == *pos + n)
                   1873:                return 0;
                   1874:
                   1875:        if (n)
                   1876:                *res = -*res;
                   1877:
1.254     schwarze 1878:        /* Each number may be followed by one optional scaling unit. */
                   1879:
                   1880:        switch (v[p]) {
                   1881:        case 'f':
1.261     schwarze 1882:                scaled = *res * 65536;
1.254     schwarze 1883:                break;
                   1884:        case 'i':
1.261     schwarze 1885:                scaled = *res * 240;
1.254     schwarze 1886:                break;
                   1887:        case 'c':
1.261     schwarze 1888:                scaled = *res * 240 / 2.54;
1.254     schwarze 1889:                break;
                   1890:        case 'v':
                   1891:        case 'P':
1.261     schwarze 1892:                scaled = *res * 40;
1.254     schwarze 1893:                break;
                   1894:        case 'm':
                   1895:        case 'n':
1.261     schwarze 1896:                scaled = *res * 24;
1.254     schwarze 1897:                break;
                   1898:        case 'p':
1.261     schwarze 1899:                scaled = *res * 10 / 3;
1.254     schwarze 1900:                break;
                   1901:        case 'u':
1.261     schwarze 1902:                scaled = *res;
1.254     schwarze 1903:                break;
                   1904:        case 'M':
1.261     schwarze 1905:                scaled = *res * 6 / 25;
1.254     schwarze 1906:                break;
                   1907:        default:
1.261     schwarze 1908:                scaled = *res;
1.254     schwarze 1909:                p--;
                   1910:                break;
                   1911:        }
1.261     schwarze 1912:        if (flags & ROFFNUM_SCALE)
                   1913:                *res = scaled;
1.254     schwarze 1914:
                   1915:        *pos = p + 1;
1.277     schwarze 1916:        return 1;
1.184     schwarze 1917: }
                   1918:
1.198     schwarze 1919: /*
                   1920:  * Evaluate a string comparison condition.
                   1921:  * The first character is the delimiter.
                   1922:  * Succeed if the string up to its second occurrence
                   1923:  * matches the string up to its third occurence.
                   1924:  * Advance the cursor after the third occurrence
                   1925:  * or lacking that, to the end of the line.
                   1926:  */
                   1927: static int
                   1928: roff_evalstrcond(const char *v, int *pos)
                   1929: {
                   1930:        const char      *s1, *s2, *s3;
                   1931:        int              match;
                   1932:
                   1933:        match = 0;
                   1934:        s1 = v + *pos;          /* initial delimiter */
                   1935:        s2 = s1 + 1;            /* for scanning the first string */
                   1936:        s3 = strchr(s2, *s1);   /* for scanning the second string */
                   1937:
                   1938:        if (NULL == s3)         /* found no middle delimiter */
                   1939:                goto out;
                   1940:
                   1941:        while ('\0' != *++s3) {
                   1942:                if (*s2 != *s3) {  /* mismatch */
                   1943:                        s3 = strchr(s3, *s1);
                   1944:                        break;
                   1945:                }
                   1946:                if (*s3 == *s1) {  /* found the final delimiter */
                   1947:                        match = 1;
                   1948:                        break;
                   1949:                }
                   1950:                s2++;
                   1951:        }
                   1952:
                   1953: out:
                   1954:        if (NULL == s3)
                   1955:                s3 = strchr(s2, '\0');
1.242     schwarze 1956:        else if (*s3 != '\0')
1.198     schwarze 1957:                s3++;
                   1958:        *pos = s3 - v;
1.277     schwarze 1959:        return match;
1.198     schwarze 1960: }
                   1961:
1.204     schwarze 1962: /*
                   1963:  * Evaluate an optionally negated single character, numerical,
                   1964:  * or string condition.
                   1965:  */
1.198     schwarze 1966: static int
1.271     schwarze 1967: roff_evalcond(struct roff *r, int ln, char *v, int *pos)
1.88      kristaps 1968: {
1.271     schwarze 1969:        char    *cp, *name;
                   1970:        size_t   sz;
1.241     schwarze 1971:        int      number, savepos, wanttrue;
1.88      kristaps 1972:
1.198     schwarze 1973:        if ('!' == v[*pos]) {
                   1974:                wanttrue = 0;
                   1975:                (*pos)++;
                   1976:        } else
                   1977:                wanttrue = 1;
                   1978:
1.88      kristaps 1979:        switch (v[*pos]) {
1.240     schwarze 1980:        case '\0':
1.277     schwarze 1981:                return 0;
1.207     schwarze 1982:        case 'n':
                   1983:        case 'o':
1.88      kristaps 1984:                (*pos)++;
1.277     schwarze 1985:                return wanttrue;
1.207     schwarze 1986:        case 'c':
                   1987:        case 'd':
                   1988:        case 'e':
                   1989:        case 't':
1.239     schwarze 1990:        case 'v':
1.88      kristaps 1991:                (*pos)++;
1.277     schwarze 1992:                return !wanttrue;
1.271     schwarze 1993:        case 'r':
                   1994:                cp = name = v + ++*pos;
                   1995:                sz = roff_getname(r, &cp, ln, *pos);
                   1996:                *pos = cp - v;
1.277     schwarze 1997:                return (sz && roff_hasregn(r, name, sz)) == wanttrue;
1.88      kristaps 1998:        default:
                   1999:                break;
                   2000:        }
                   2001:
1.241     schwarze 2002:        savepos = *pos;
1.261     schwarze 2003:        if (roff_evalnum(r, ln, v, pos, &number, ROFFNUM_SCALE))
1.277     schwarze 2004:                return (number > 0) == wanttrue;
1.241     schwarze 2005:        else if (*pos == savepos)
1.277     schwarze 2006:                return roff_evalstrcond(v, pos) == wanttrue;
1.204     schwarze 2007:        else
1.277     schwarze 2008:                return 0;
1.88      kristaps 2009: }
                   2010:
1.74      kristaps 2011: static enum rofferr
1.103     kristaps 2012: roff_line_ignore(ROFF_ARGS)
1.89      kristaps 2013: {
1.123     schwarze 2014:
1.277     schwarze 2015:        return ROFF_IGN;
1.89      kristaps 2016: }
                   2017:
1.104     kristaps 2018: static enum rofferr
1.251     schwarze 2019: roff_insec(ROFF_ARGS)
                   2020: {
                   2021:
                   2022:        mandoc_msg(MANDOCERR_REQ_INSEC, r->parse,
1.295     schwarze 2023:            ln, ppos, roff_name[tok]);
1.277     schwarze 2024:        return ROFF_IGN;
1.251     schwarze 2025: }
                   2026:
                   2027: static enum rofferr
                   2028: roff_unsupp(ROFF_ARGS)
                   2029: {
                   2030:
                   2031:        mandoc_msg(MANDOCERR_REQ_UNSUPP, r->parse,
1.295     schwarze 2032:            ln, ppos, roff_name[tok]);
1.277     schwarze 2033:        return ROFF_IGN;
1.251     schwarze 2034: }
                   2035:
                   2036: static enum rofferr
1.82      kristaps 2037: roff_cond(ROFF_ARGS)
1.74      kristaps 2038: {
1.173     schwarze 2039:
                   2040:        roffnode_push(r, tok, NULL, ln, ppos);
1.74      kristaps 2041:
1.207     schwarze 2042:        /*
1.134     kristaps 2043:         * An `.el' has no conditional body: it will consume the value
                   2044:         * of the current rstack entry set in prior `ie' calls or
1.207     schwarze 2045:         * defaults to DENY.
1.134     kristaps 2046:         *
                   2047:         * If we're not an `el', however, then evaluate the conditional.
                   2048:         */
1.133     kristaps 2049:
1.238     schwarze 2050:        r->last->rule = tok == ROFF_el ?
1.207     schwarze 2051:            (r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) :
1.238     schwarze 2052:            roff_evalcond(r, ln, buf->buf, &pos);
1.77      kristaps 2053:
1.134     kristaps 2054:        /*
                   2055:         * An if-else will put the NEGATION of the current evaluated
                   2056:         * conditional into the stack of rules.
                   2057:         */
                   2058:
1.238     schwarze 2059:        if (tok == ROFF_ie) {
1.223     schwarze 2060:                if (r->rstackpos + 1 == r->rstacksz) {
                   2061:                        r->rstacksz += 16;
                   2062:                        r->rstack = mandoc_reallocarray(r->rstack,
                   2063:                            r->rstacksz, sizeof(int));
1.134     kristaps 2064:                }
1.198     schwarze 2065:                r->rstack[++r->rstackpos] = !r->last->rule;
1.82      kristaps 2066:        }
1.88      kristaps 2067:
                   2068:        /* If the parent has false as its rule, then so do we. */
                   2069:
1.198     schwarze 2070:        if (r->last->parent && !r->last->parent->rule)
                   2071:                r->last->rule = 0;
1.88      kristaps 2072:
                   2073:        /*
1.173     schwarze 2074:         * Determine scope.
                   2075:         * If there is nothing on the line after the conditional,
                   2076:         * not even whitespace, use next-line scope.
1.88      kristaps 2077:         */
1.74      kristaps 2078:
1.238     schwarze 2079:        if (buf->buf[pos] == '\0') {
1.173     schwarze 2080:                r->last->endspan = 2;
                   2081:                goto out;
                   2082:        }
                   2083:
1.238     schwarze 2084:        while (buf->buf[pos] == ' ')
1.173     schwarze 2085:                pos++;
                   2086:
                   2087:        /* An opening brace requests multiline scope. */
1.75      kristaps 2088:
1.238     schwarze 2089:        if (buf->buf[pos] == '\\' && buf->buf[pos + 1] == '{') {
1.75      kristaps 2090:                r->last->endspan = -1;
                   2091:                pos += 2;
1.272     schwarze 2092:                while (buf->buf[pos] == ' ')
                   2093:                        pos++;
1.173     schwarze 2094:                goto out;
1.207     schwarze 2095:        }
1.74      kristaps 2096:
1.77      kristaps 2097:        /*
1.173     schwarze 2098:         * Anything else following the conditional causes
                   2099:         * single-line scope.  Warn if the scope contains
                   2100:         * nothing but trailing whitespace.
1.77      kristaps 2101:         */
                   2102:
1.238     schwarze 2103:        if (buf->buf[pos] == '\0')
1.216     schwarze 2104:                mandoc_msg(MANDOCERR_COND_EMPTY, r->parse,
1.295     schwarze 2105:                    ln, ppos, roff_name[tok]);
1.77      kristaps 2106:
1.173     schwarze 2107:        r->last->endspan = 1;
1.74      kristaps 2108:
1.173     schwarze 2109: out:
1.75      kristaps 2110:        *offs = pos;
1.277     schwarze 2111:        return ROFF_RERUN;
1.83      schwarze 2112: }
                   2113:
                   2114: static enum rofferr
1.92      schwarze 2115: roff_ds(ROFF_ARGS)
                   2116: {
1.212     schwarze 2117:        char            *string;
                   2118:        const char      *name;
                   2119:        size_t           namesz;
1.96      kristaps 2120:
1.251     schwarze 2121:        /* Ignore groff compatibility mode for now. */
                   2122:
                   2123:        if (tok == ROFF_ds1)
                   2124:                tok = ROFF_ds;
                   2125:        else if (tok == ROFF_as1)
                   2126:                tok = ROFF_as;
                   2127:
1.96      kristaps 2128:        /*
1.212     schwarze 2129:         * The first word is the name of the string.
                   2130:         * If it is empty or terminated by an escape sequence,
                   2131:         * abort the `ds' request without defining anything.
1.96      kristaps 2132:         */
1.92      schwarze 2133:
1.238     schwarze 2134:        name = string = buf->buf + pos;
                   2135:        if (*name == '\0')
1.277     schwarze 2136:                return ROFF_IGN;
1.92      schwarze 2137:
1.212     schwarze 2138:        namesz = roff_getname(r, &string, ln, pos);
1.238     schwarze 2139:        if (name[namesz] == '\\')
1.277     schwarze 2140:                return ROFF_IGN;
1.212     schwarze 2141:
                   2142:        /* Read past the initial double-quote, if any. */
1.238     schwarze 2143:        if (*string == '"')
1.92      schwarze 2144:                string++;
                   2145:
1.96      kristaps 2146:        /* The rest is the value. */
1.212     schwarze 2147:        roff_setstrn(&r->strtab, name, namesz, string, strlen(string),
                   2148:            ROFF_as == tok);
1.277     schwarze 2149:        return ROFF_IGN;
1.92      schwarze 2150: }
                   2151:
1.204     schwarze 2152: /*
                   2153:  * Parse a single operator, one or two characters long.
                   2154:  * If the operator is recognized, return success and advance the
                   2155:  * parse point, else return failure and let the parse point unchanged.
                   2156:  */
                   2157: static int
                   2158: roff_getop(const char *v, int *pos, char *res)
                   2159: {
                   2160:
                   2161:        *res = v[*pos];
                   2162:
                   2163:        switch (*res) {
1.207     schwarze 2164:        case '+':
                   2165:        case '-':
                   2166:        case '*':
                   2167:        case '/':
                   2168:        case '%':
                   2169:        case '&':
                   2170:        case ':':
1.204     schwarze 2171:                break;
                   2172:        case '<':
                   2173:                switch (v[*pos + 1]) {
1.207     schwarze 2174:                case '=':
1.204     schwarze 2175:                        *res = 'l';
                   2176:                        (*pos)++;
                   2177:                        break;
1.207     schwarze 2178:                case '>':
1.204     schwarze 2179:                        *res = '!';
                   2180:                        (*pos)++;
                   2181:                        break;
1.207     schwarze 2182:                case '?':
1.204     schwarze 2183:                        *res = 'i';
                   2184:                        (*pos)++;
                   2185:                        break;
                   2186:                default:
                   2187:                        break;
                   2188:                }
                   2189:                break;
                   2190:        case '>':
                   2191:                switch (v[*pos + 1]) {
1.207     schwarze 2192:                case '=':
1.204     schwarze 2193:                        *res = 'g';
                   2194:                        (*pos)++;
                   2195:                        break;
1.207     schwarze 2196:                case '?':
1.204     schwarze 2197:                        *res = 'a';
                   2198:                        (*pos)++;
                   2199:                        break;
                   2200:                default:
                   2201:                        break;
                   2202:                }
                   2203:                break;
                   2204:        case '=':
                   2205:                if ('=' == v[*pos + 1])
                   2206:                        (*pos)++;
                   2207:                break;
                   2208:        default:
1.277     schwarze 2209:                return 0;
1.204     schwarze 2210:        }
                   2211:        (*pos)++;
                   2212:
1.277     schwarze 2213:        return *res;
1.204     schwarze 2214: }
                   2215:
                   2216: /*
                   2217:  * Evaluate either a parenthesized numeric expression
                   2218:  * or a single signed integer number.
                   2219:  */
                   2220: static int
1.235     schwarze 2221: roff_evalpar(struct roff *r, int ln,
1.261     schwarze 2222:        const char *v, int *pos, int *res, int flags)
1.204     schwarze 2223: {
                   2224:
                   2225:        if ('(' != v[*pos])
1.277     schwarze 2226:                return roff_getnum(v, pos, res, flags);
1.204     schwarze 2227:
                   2228:        (*pos)++;
1.261     schwarze 2229:        if ( ! roff_evalnum(r, ln, v, pos, res, flags | ROFFNUM_WHITE))
1.277     schwarze 2230:                return 0;
1.204     schwarze 2231:
1.206     schwarze 2232:        /*
                   2233:         * Omission of the closing parenthesis
                   2234:         * is an error in validation mode,
                   2235:         * but ignored in evaluation mode.
                   2236:         */
                   2237:
1.204     schwarze 2238:        if (')' == v[*pos])
                   2239:                (*pos)++;
1.206     schwarze 2240:        else if (NULL == res)
1.277     schwarze 2241:                return 0;
1.204     schwarze 2242:
1.277     schwarze 2243:        return 1;
1.204     schwarze 2244: }
                   2245:
                   2246: /*
                   2247:  * Evaluate a complete numeric expression.
                   2248:  * Proceed left to right, there is no concept of precedence.
                   2249:  */
                   2250: static int
1.235     schwarze 2251: roff_evalnum(struct roff *r, int ln, const char *v,
1.261     schwarze 2252:        int *pos, int *res, int flags)
1.204     schwarze 2253: {
                   2254:        int              mypos, operand2;
                   2255:        char             operator;
                   2256:
                   2257:        if (NULL == pos) {
                   2258:                mypos = 0;
                   2259:                pos = &mypos;
                   2260:        }
                   2261:
1.261     schwarze 2262:        if (flags & ROFFNUM_WHITE)
1.204     schwarze 2263:                while (isspace((unsigned char)v[*pos]))
                   2264:                        (*pos)++;
                   2265:
1.261     schwarze 2266:        if ( ! roff_evalpar(r, ln, v, pos, res, flags))
1.277     schwarze 2267:                return 0;
1.204     schwarze 2268:
                   2269:        while (1) {
1.261     schwarze 2270:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2271:                        while (isspace((unsigned char)v[*pos]))
                   2272:                                (*pos)++;
                   2273:
                   2274:                if ( ! roff_getop(v, pos, &operator))
                   2275:                        break;
                   2276:
1.261     schwarze 2277:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2278:                        while (isspace((unsigned char)v[*pos]))
                   2279:                                (*pos)++;
                   2280:
1.261     schwarze 2281:                if ( ! roff_evalpar(r, ln, v, pos, &operand2, flags))
1.277     schwarze 2282:                        return 0;
1.204     schwarze 2283:
1.261     schwarze 2284:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2285:                        while (isspace((unsigned char)v[*pos]))
                   2286:                                (*pos)++;
1.206     schwarze 2287:
                   2288:                if (NULL == res)
                   2289:                        continue;
1.204     schwarze 2290:
                   2291:                switch (operator) {
1.207     schwarze 2292:                case '+':
1.204     schwarze 2293:                        *res += operand2;
                   2294:                        break;
1.207     schwarze 2295:                case '-':
1.204     schwarze 2296:                        *res -= operand2;
                   2297:                        break;
1.207     schwarze 2298:                case '*':
1.204     schwarze 2299:                        *res *= operand2;
                   2300:                        break;
1.207     schwarze 2301:                case '/':
1.244     schwarze 2302:                        if (operand2 == 0) {
1.235     schwarze 2303:                                mandoc_msg(MANDOCERR_DIVZERO,
1.234     kristaps 2304:                                        r->parse, ln, *pos, v);
                   2305:                                *res = 0;
                   2306:                                break;
                   2307:                        }
1.204     schwarze 2308:                        *res /= operand2;
                   2309:                        break;
1.207     schwarze 2310:                case '%':
1.244     schwarze 2311:                        if (operand2 == 0) {
                   2312:                                mandoc_msg(MANDOCERR_DIVZERO,
                   2313:                                        r->parse, ln, *pos, v);
                   2314:                                *res = 0;
                   2315:                                break;
                   2316:                        }
1.204     schwarze 2317:                        *res %= operand2;
                   2318:                        break;
1.207     schwarze 2319:                case '<':
1.204     schwarze 2320:                        *res = *res < operand2;
                   2321:                        break;
1.207     schwarze 2322:                case '>':
1.204     schwarze 2323:                        *res = *res > operand2;
                   2324:                        break;
1.207     schwarze 2325:                case 'l':
1.204     schwarze 2326:                        *res = *res <= operand2;
                   2327:                        break;
1.207     schwarze 2328:                case 'g':
1.204     schwarze 2329:                        *res = *res >= operand2;
                   2330:                        break;
1.207     schwarze 2331:                case '=':
1.204     schwarze 2332:                        *res = *res == operand2;
                   2333:                        break;
1.207     schwarze 2334:                case '!':
1.204     schwarze 2335:                        *res = *res != operand2;
                   2336:                        break;
1.207     schwarze 2337:                case '&':
1.204     schwarze 2338:                        *res = *res && operand2;
                   2339:                        break;
1.207     schwarze 2340:                case ':':
1.204     schwarze 2341:                        *res = *res || operand2;
                   2342:                        break;
1.207     schwarze 2343:                case 'i':
1.204     schwarze 2344:                        if (operand2 < *res)
                   2345:                                *res = operand2;
                   2346:                        break;
1.207     schwarze 2347:                case 'a':
1.204     schwarze 2348:                        if (operand2 > *res)
                   2349:                                *res = operand2;
                   2350:                        break;
                   2351:                default:
                   2352:                        abort();
                   2353:                }
                   2354:        }
1.277     schwarze 2355:        return 1;
1.204     schwarze 2356: }
                   2357:
1.266     schwarze 2358: /* --- register management ------------------------------------------------ */
                   2359:
1.180     schwarze 2360: void
1.187     schwarze 2361: roff_setreg(struct roff *r, const char *name, int val, char sign)
1.147     kristaps 2362: {
1.180     schwarze 2363:        struct roffreg  *reg;
                   2364:
                   2365:        /* Search for an existing register with the same name. */
                   2366:        reg = r->regtab;
                   2367:
                   2368:        while (reg && strcmp(name, reg->key.p))
                   2369:                reg = reg->next;
1.147     kristaps 2370:
1.180     schwarze 2371:        if (NULL == reg) {
                   2372:                /* Create a new register. */
                   2373:                reg = mandoc_malloc(sizeof(struct roffreg));
                   2374:                reg->key.p = mandoc_strdup(name);
                   2375:                reg->key.sz = strlen(name);
1.187     schwarze 2376:                reg->val = 0;
1.180     schwarze 2377:                reg->next = r->regtab;
                   2378:                r->regtab = reg;
                   2379:        }
                   2380:
1.187     schwarze 2381:        if ('+' == sign)
                   2382:                reg->val += val;
                   2383:        else if ('-' == sign)
                   2384:                reg->val -= val;
                   2385:        else
                   2386:                reg->val = val;
1.147     kristaps 2387: }
                   2388:
1.192     schwarze 2389: /*
                   2390:  * Handle some predefined read-only number registers.
                   2391:  * For now, return -1 if the requested register is not predefined;
                   2392:  * in case a predefined read-only register having the value -1
                   2393:  * were to turn up, another special value would have to be chosen.
                   2394:  */
                   2395: static int
1.273     schwarze 2396: roff_getregro(const struct roff *r, const char *name)
1.192     schwarze 2397: {
                   2398:
                   2399:        switch (*name) {
1.273     schwarze 2400:        case '$':  /* Number of arguments of the last macro evaluated. */
1.277     schwarze 2401:                return r->argc;
1.207     schwarze 2402:        case 'A':  /* ASCII approximation mode is always off. */
1.277     schwarze 2403:                return 0;
1.207     schwarze 2404:        case 'g':  /* Groff compatibility mode is always on. */
1.277     schwarze 2405:                return 1;
1.207     schwarze 2406:        case 'H':  /* Fixed horizontal resolution. */
1.277     schwarze 2407:                return 24;
1.207     schwarze 2408:        case 'j':  /* Always adjust left margin only. */
1.277     schwarze 2409:                return 0;
1.207     schwarze 2410:        case 'T':  /* Some output device is always defined. */
1.277     schwarze 2411:                return 1;
1.207     schwarze 2412:        case 'V':  /* Fixed vertical resolution. */
1.277     schwarze 2413:                return 40;
1.192     schwarze 2414:        default:
1.277     schwarze 2415:                return -1;
1.192     schwarze 2416:        }
                   2417: }
                   2418:
1.181     schwarze 2419: int
1.180     schwarze 2420: roff_getreg(const struct roff *r, const char *name)
1.147     kristaps 2421: {
1.180     schwarze 2422:        struct roffreg  *reg;
1.192     schwarze 2423:        int              val;
                   2424:
                   2425:        if ('.' == name[0] && '\0' != name[1] && '\0' == name[2]) {
1.273     schwarze 2426:                val = roff_getregro(r, name + 1);
1.192     schwarze 2427:                if (-1 != val)
1.277     schwarze 2428:                        return val;
1.192     schwarze 2429:        }
1.180     schwarze 2430:
                   2431:        for (reg = r->regtab; reg; reg = reg->next)
                   2432:                if (0 == strcmp(name, reg->key.p))
1.277     schwarze 2433:                        return reg->val;
1.181     schwarze 2434:
1.277     schwarze 2435:        return 0;
1.181     schwarze 2436: }
                   2437:
                   2438: static int
                   2439: roff_getregn(const struct roff *r, const char *name, size_t len)
                   2440: {
                   2441:        struct roffreg  *reg;
1.192     schwarze 2442:        int              val;
                   2443:
                   2444:        if ('.' == name[0] && 2 == len) {
1.273     schwarze 2445:                val = roff_getregro(r, name + 1);
1.192     schwarze 2446:                if (-1 != val)
1.277     schwarze 2447:                        return val;
1.192     schwarze 2448:        }
1.181     schwarze 2449:
                   2450:        for (reg = r->regtab; reg; reg = reg->next)
                   2451:                if (len == reg->key.sz &&
                   2452:                    0 == strncmp(name, reg->key.p, len))
1.277     schwarze 2453:                        return reg->val;
1.271     schwarze 2454:
1.277     schwarze 2455:        return 0;
1.271     schwarze 2456: }
                   2457:
                   2458: static int
                   2459: roff_hasregn(const struct roff *r, const char *name, size_t len)
                   2460: {
                   2461:        struct roffreg  *reg;
                   2462:        int              val;
                   2463:
                   2464:        if ('.' == name[0] && 2 == len) {
1.273     schwarze 2465:                val = roff_getregro(r, name + 1);
1.271     schwarze 2466:                if (-1 != val)
1.277     schwarze 2467:                        return 1;
1.271     schwarze 2468:        }
                   2469:
                   2470:        for (reg = r->regtab; reg; reg = reg->next)
                   2471:                if (len == reg->key.sz &&
                   2472:                    0 == strncmp(name, reg->key.p, len))
1.277     schwarze 2473:                        return 1;
1.147     kristaps 2474:
1.277     schwarze 2475:        return 0;
1.147     kristaps 2476: }
                   2477:
1.180     schwarze 2478: static void
                   2479: roff_freereg(struct roffreg *reg)
1.147     kristaps 2480: {
1.180     schwarze 2481:        struct roffreg  *old_reg;
1.147     kristaps 2482:
1.180     schwarze 2483:        while (NULL != reg) {
                   2484:                free(reg->key.p);
                   2485:                old_reg = reg;
                   2486:                reg = reg->next;
                   2487:                free(old_reg);
                   2488:        }
1.147     kristaps 2489: }
1.92      schwarze 2490:
                   2491: static enum rofferr
1.89      kristaps 2492: roff_nr(ROFF_ARGS)
1.83      schwarze 2493: {
1.212     schwarze 2494:        char            *key, *val;
                   2495:        size_t           keysz;
1.138     kristaps 2496:        int              iv;
1.187     schwarze 2497:        char             sign;
1.89      kristaps 2498:
1.238     schwarze 2499:        key = val = buf->buf + pos;
                   2500:        if (*key == '\0')
1.277     schwarze 2501:                return ROFF_IGN;
1.212     schwarze 2502:
                   2503:        keysz = roff_getname(r, &val, ln, pos);
1.238     schwarze 2504:        if (key[keysz] == '\\')
1.277     schwarze 2505:                return ROFF_IGN;
1.212     schwarze 2506:        key[keysz] = '\0';
1.89      kristaps 2507:
1.187     schwarze 2508:        sign = *val;
1.238     schwarze 2509:        if (sign == '+' || sign == '-')
1.187     schwarze 2510:                val++;
                   2511:
1.261     schwarze 2512:        if (roff_evalnum(r, ln, val, NULL, &iv, ROFFNUM_SCALE))
1.204     schwarze 2513:                roff_setreg(r, key, iv, sign);
1.109     kristaps 2514:
1.277     schwarze 2515:        return ROFF_IGN;
1.203     schwarze 2516: }
                   2517:
                   2518: static enum rofferr
                   2519: roff_rr(ROFF_ARGS)
                   2520: {
                   2521:        struct roffreg  *reg, **prev;
1.212     schwarze 2522:        char            *name, *cp;
                   2523:        size_t           namesz;
1.203     schwarze 2524:
1.238     schwarze 2525:        name = cp = buf->buf + pos;
                   2526:        if (*name == '\0')
1.277     schwarze 2527:                return ROFF_IGN;
1.212     schwarze 2528:        namesz = roff_getname(r, &cp, ln, pos);
                   2529:        name[namesz] = '\0';
1.203     schwarze 2530:
                   2531:        prev = &r->regtab;
                   2532:        while (1) {
                   2533:                reg = *prev;
1.238     schwarze 2534:                if (reg == NULL || !strcmp(name, reg->key.p))
1.203     schwarze 2535:                        break;
                   2536:                prev = &reg->next;
                   2537:        }
1.238     schwarze 2538:        if (reg != NULL) {
1.203     schwarze 2539:                *prev = reg->next;
                   2540:                free(reg->key.p);
                   2541:                free(reg);
                   2542:        }
1.277     schwarze 2543:        return ROFF_IGN;
1.122     schwarze 2544: }
                   2545:
1.266     schwarze 2546: /* --- handler functions for roff requests -------------------------------- */
                   2547:
1.122     schwarze 2548: static enum rofferr
                   2549: roff_rm(ROFF_ARGS)
                   2550: {
                   2551:        const char       *name;
                   2552:        char             *cp;
1.212     schwarze 2553:        size_t            namesz;
1.122     schwarze 2554:
1.238     schwarze 2555:        cp = buf->buf + pos;
                   2556:        while (*cp != '\0') {
1.212     schwarze 2557:                name = cp;
1.238     schwarze 2558:                namesz = roff_getname(r, &cp, ln, (int)(cp - buf->buf));
1.212     schwarze 2559:                roff_setstrn(&r->strtab, name, namesz, NULL, 0, 0);
1.238     schwarze 2560:                if (name[namesz] == '\\')
1.212     schwarze 2561:                        break;
1.122     schwarze 2562:        }
1.277     schwarze 2563:        return ROFF_IGN;
1.178     schwarze 2564: }
                   2565:
                   2566: static enum rofferr
                   2567: roff_it(ROFF_ARGS)
                   2568: {
                   2569:        int              iv;
                   2570:
                   2571:        /* Parse the number of lines. */
1.261     schwarze 2572:
                   2573:        if ( ! roff_evalnum(r, ln, buf->buf, &pos, &iv, 0)) {
1.222     schwarze 2574:                mandoc_msg(MANDOCERR_IT_NONUM, r->parse,
1.238     schwarze 2575:                    ln, ppos, buf->buf + 1);
1.277     schwarze 2576:                return ROFF_IGN;
1.178     schwarze 2577:        }
                   2578:
1.262     schwarze 2579:        while (isspace((unsigned char)buf->buf[pos]))
                   2580:                pos++;
                   2581:
                   2582:        /*
                   2583:         * Arm the input line trap.
                   2584:         * Special-casing "an-trap" is an ugly workaround to cope
                   2585:         * with DocBook stupidly fiddling with man(7) internals.
                   2586:         */
1.261     schwarze 2587:
1.178     schwarze 2588:        roffit_lines = iv;
1.262     schwarze 2589:        roffit_macro = mandoc_strdup(iv != 1 ||
                   2590:            strcmp(buf->buf + pos, "an-trap") ?
                   2591:            buf->buf + pos : "br");
1.277     schwarze 2592:        return ROFF_IGN;
1.175     schwarze 2593: }
                   2594:
                   2595: static enum rofferr
                   2596: roff_Dd(ROFF_ARGS)
                   2597: {
                   2598:        const char *const       *cp;
                   2599:
1.227     schwarze 2600:        if ((r->options & (MPARSE_MDOC | MPARSE_QUICK)) == 0)
1.175     schwarze 2601:                for (cp = __mdoc_reserved; *cp; cp++)
                   2602:                        roff_setstr(r, *cp, NULL, 0);
                   2603:
1.227     schwarze 2604:        if (r->format == 0)
                   2605:                r->format = MPARSE_MDOC;
                   2606:
1.277     schwarze 2607:        return ROFF_CONT;
1.175     schwarze 2608: }
                   2609:
                   2610: static enum rofferr
                   2611: roff_TH(ROFF_ARGS)
                   2612: {
                   2613:        const char *const       *cp;
                   2614:
1.227     schwarze 2615:        if ((r->options & MPARSE_QUICK) == 0)
1.175     schwarze 2616:                for (cp = __man_reserved; *cp; cp++)
                   2617:                        roff_setstr(r, *cp, NULL, 0);
                   2618:
1.227     schwarze 2619:        if (r->format == 0)
                   2620:                r->format = MPARSE_MAN;
                   2621:
1.277     schwarze 2622:        return ROFF_CONT;
1.109     kristaps 2623: }
                   2624:
                   2625: static enum rofferr
                   2626: roff_TE(ROFF_ARGS)
                   2627: {
                   2628:
                   2629:        if (NULL == r->tbl)
1.221     schwarze 2630:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   2631:                    ln, ppos, "TE");
1.258     schwarze 2632:        else if ( ! tbl_end(&r->tbl)) {
                   2633:                free(buf->buf);
                   2634:                buf->buf = mandoc_strdup(".sp");
                   2635:                buf->sz = 4;
1.277     schwarze 2636:                return ROFF_REPARSE;
1.258     schwarze 2637:        }
1.277     schwarze 2638:        return ROFF_IGN;
1.112     kristaps 2639: }
                   2640:
                   2641: static enum rofferr
                   2642: roff_T_(ROFF_ARGS)
                   2643: {
                   2644:
                   2645:        if (NULL == r->tbl)
1.221     schwarze 2646:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   2647:                    ln, ppos, "T&");
1.112     kristaps 2648:        else
1.296     schwarze 2649:                tbl_restart(ln, ppos, r->tbl);
1.112     kristaps 2650:
1.277     schwarze 2651:        return ROFF_IGN;
1.109     kristaps 2652: }
                   2653:
1.230     schwarze 2654: /*
                   2655:  * Handle in-line equation delimiters.
                   2656:  */
                   2657: static enum rofferr
1.238     schwarze 2658: roff_eqndelim(struct roff *r, struct buf *buf, int pos)
1.151     kristaps 2659: {
1.233     schwarze 2660:        char            *cp1, *cp2;
                   2661:        const char      *bef_pr, *bef_nl, *mac, *aft_nl, *aft_pr;
1.151     kristaps 2662:
1.230     schwarze 2663:        /*
                   2664:         * Outside equations, look for an opening delimiter.
                   2665:         * If we are inside an equation, we already know it is
                   2666:         * in-line, or this function wouldn't have been called;
                   2667:         * so look for a closing delimiter.
                   2668:         */
                   2669:
1.238     schwarze 2670:        cp1 = buf->buf + pos;
1.230     schwarze 2671:        cp2 = strchr(cp1, r->eqn == NULL ?
                   2672:            r->last_eqn->odelim : r->last_eqn->cdelim);
                   2673:        if (cp2 == NULL)
1.277     schwarze 2674:                return ROFF_CONT;
1.230     schwarze 2675:
1.233     schwarze 2676:        *cp2++ = '\0';
                   2677:        bef_pr = bef_nl = aft_nl = aft_pr = "";
                   2678:
                   2679:        /* Handle preceding text, protecting whitespace. */
                   2680:
1.238     schwarze 2681:        if (*buf->buf != '\0') {
1.233     schwarze 2682:                if (r->eqn == NULL)
                   2683:                        bef_pr = "\\&";
                   2684:                bef_nl = "\n";
                   2685:        }
                   2686:
                   2687:        /*
                   2688:         * Prepare replacing the delimiter with an equation macro
                   2689:         * and drop leading white space from the equation.
                   2690:         */
1.230     schwarze 2691:
1.233     schwarze 2692:        if (r->eqn == NULL) {
                   2693:                while (*cp2 == ' ')
                   2694:                        cp2++;
                   2695:                mac = ".EQ";
                   2696:        } else
                   2697:                mac = ".EN";
                   2698:
                   2699:        /* Handle following text, protecting whitespace. */
                   2700:
                   2701:        if (*cp2 != '\0') {
                   2702:                aft_nl = "\n";
                   2703:                if (r->eqn != NULL)
                   2704:                        aft_pr = "\\&";
                   2705:        }
                   2706:
                   2707:        /* Do the actual replacement. */
                   2708:
1.238     schwarze 2709:        buf->sz = mandoc_asprintf(&cp1, "%s%s%s%s%s%s%s", buf->buf,
1.233     schwarze 2710:            bef_pr, bef_nl, mac, aft_nl, aft_pr, cp2) + 1;
1.238     schwarze 2711:        free(buf->buf);
                   2712:        buf->buf = cp1;
1.230     schwarze 2713:
                   2714:        /* Toggle the in-line state of the eqn subsystem. */
                   2715:
                   2716:        r->eqn_inline = r->eqn == NULL;
1.277     schwarze 2717:        return ROFF_REPARSE;
1.151     kristaps 2718: }
                   2719:
1.235     schwarze 2720: static enum rofferr
                   2721: roff_EQ(ROFF_ARGS)
1.125     kristaps 2722: {
1.151     kristaps 2723:        struct eqn_node *e;
1.125     kristaps 2724:
1.238     schwarze 2725:        assert(r->eqn == NULL);
1.235     schwarze 2726:        e = eqn_alloc(ppos, ln, r->parse);
1.125     kristaps 2727:
1.230     schwarze 2728:        if (r->last_eqn) {
1.125     kristaps 2729:                r->last_eqn->next = e;
1.230     schwarze 2730:                e->delim = r->last_eqn->delim;
                   2731:                e->odelim = r->last_eqn->odelim;
                   2732:                e->cdelim = r->last_eqn->cdelim;
                   2733:        } else
1.125     kristaps 2734:                r->first_eqn = r->last_eqn = e;
                   2735:
                   2736:        r->eqn = r->last_eqn = e;
1.151     kristaps 2737:
1.238     schwarze 2738:        if (buf->buf[pos] != '\0')
1.235     schwarze 2739:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238     schwarze 2740:                    ".EQ %s", buf->buf + pos);
1.151     kristaps 2741:
1.277     schwarze 2742:        return ROFF_IGN;
1.125     kristaps 2743: }
                   2744:
                   2745: static enum rofferr
                   2746: roff_EN(ROFF_ARGS)
                   2747: {
                   2748:
1.221     schwarze 2749:        mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse, ln, ppos, "EN");
1.277     schwarze 2750:        return ROFF_IGN;
1.125     kristaps 2751: }
                   2752:
                   2753: static enum rofferr
1.109     kristaps 2754: roff_TS(ROFF_ARGS)
                   2755: {
1.176     schwarze 2756:        struct tbl_node *tbl;
1.89      kristaps 2757:
1.115     kristaps 2758:        if (r->tbl) {
1.221     schwarze 2759:                mandoc_msg(MANDOCERR_BLK_BROKEN, r->parse,
                   2760:                    ln, ppos, "TS breaks TS");
1.151     kristaps 2761:                tbl_end(&r->tbl);
1.115     kristaps 2762:        }
1.83      schwarze 2763:
1.176     schwarze 2764:        tbl = tbl_alloc(ppos, ln, r->parse);
1.113     kristaps 2765:
                   2766:        if (r->last_tbl)
1.176     schwarze 2767:                r->last_tbl->next = tbl;
1.113     kristaps 2768:        else
1.176     schwarze 2769:                r->first_tbl = r->last_tbl = tbl;
1.113     kristaps 2770:
1.176     schwarze 2771:        r->tbl = r->last_tbl = tbl;
1.297     schwarze 2772:        return ROFF_IGN;
                   2773: }
                   2774:
                   2775: static enum rofferr
                   2776: roff_onearg(ROFF_ARGS)
                   2777: {
                   2778:        struct roff_node        *n;
                   2779:        char                    *cp;
                   2780:
                   2781:        roff_elem_alloc(r->man, ln, ppos, tok);
                   2782:        n = r->man->last;
                   2783:
                   2784:        cp = buf->buf + pos;
                   2785:        if (*cp != '\0') {
                   2786:                while (*cp != '\0' && *cp != ' ')
                   2787:                        cp++;
                   2788:                while (*cp == ' ')
                   2789:                        *cp++ = '\0';
                   2790:                if (*cp != '\0')
                   2791:                        mandoc_vmsg(MANDOCERR_ARG_EXCESS,
                   2792:                            r->parse, ln, cp - buf->buf,
                   2793:                            "%s ... %s", roff_name[tok], cp);
                   2794:                roff_word_alloc(r->man, ln, pos, buf->buf + pos);
1.300     schwarze 2795:        }
                   2796:
                   2797:        n->flags |= NODE_LINE | NODE_VALID | NODE_ENDED;
                   2798:        r->man->last = n;
                   2799:        r->man->next = ROFF_NEXT_SIBLING;
                   2800:        return ROFF_IGN;
                   2801: }
                   2802:
                   2803: static enum rofferr
                   2804: roff_manyarg(ROFF_ARGS)
                   2805: {
                   2806:        struct roff_node        *n;
                   2807:        char                    *sp, *ep;
                   2808:
                   2809:        roff_elem_alloc(r->man, ln, ppos, tok);
                   2810:        n = r->man->last;
                   2811:
                   2812:        for (sp = ep = buf->buf + pos; *sp != '\0'; sp = ep) {
                   2813:                while (*ep != '\0' && *ep != ' ')
                   2814:                        ep++;
                   2815:                while (*ep == ' ')
                   2816:                        *ep++ = '\0';
                   2817:                roff_word_alloc(r->man, ln, sp - buf->buf, sp);
1.297     schwarze 2818:        }
                   2819:
                   2820:        n->flags |= NODE_LINE | NODE_VALID | NODE_ENDED;
                   2821:        r->man->last = n;
                   2822:        r->man->next = ROFF_NEXT_SIBLING;
1.277     schwarze 2823:        return ROFF_IGN;
1.251     schwarze 2824: }
                   2825:
                   2826: static enum rofferr
1.296     schwarze 2827: roff_br(ROFF_ARGS)
1.251     schwarze 2828: {
1.296     schwarze 2829:        roff_elem_alloc(r->man, ln, ppos, ROFF_br);
                   2830:        if (buf->buf[pos] != '\0')
                   2831:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
                   2832:                    "%s %s", roff_name[tok], buf->buf + pos);
                   2833:        r->man->last->flags |= NODE_LINE | NODE_VALID | NODE_ENDED;
                   2834:        r->man->next = ROFF_NEXT_SIBLING;
                   2835:        return ROFF_IGN;
1.92      schwarze 2836: }
                   2837:
1.105     kristaps 2838: static enum rofferr
1.174     kristaps 2839: roff_cc(ROFF_ARGS)
                   2840: {
                   2841:        const char      *p;
                   2842:
1.238     schwarze 2843:        p = buf->buf + pos;
1.174     kristaps 2844:
1.238     schwarze 2845:        if (*p == '\0' || (r->control = *p++) == '.')
1.174     kristaps 2846:                r->control = 0;
                   2847:
1.238     schwarze 2848:        if (*p != '\0')
1.260     schwarze 2849:                mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
                   2850:                    ln, p - buf->buf, "cc ... %s", p);
1.174     kristaps 2851:
1.277     schwarze 2852:        return ROFF_IGN;
1.174     kristaps 2853: }
                   2854:
                   2855: static enum rofferr
1.164     kristaps 2856: roff_tr(ROFF_ARGS)
                   2857: {
                   2858:        const char      *p, *first, *second;
                   2859:        size_t           fsz, ssz;
                   2860:        enum mandoc_esc  esc;
                   2861:
1.238     schwarze 2862:        p = buf->buf + pos;
1.164     kristaps 2863:
1.238     schwarze 2864:        if (*p == '\0') {
1.260     schwarze 2865:                mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse, ln, ppos, "tr");
1.277     schwarze 2866:                return ROFF_IGN;
1.164     kristaps 2867:        }
                   2868:
1.238     schwarze 2869:        while (*p != '\0') {
1.164     kristaps 2870:                fsz = ssz = 1;
                   2871:
                   2872:                first = p++;
1.238     schwarze 2873:                if (*first == '\\') {
1.164     kristaps 2874:                        esc = mandoc_escape(&p, NULL, NULL);
1.238     schwarze 2875:                        if (esc == ESCAPE_ERROR) {
1.219     schwarze 2876:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 2877:                                    ln, (int)(p - buf->buf), first);
1.277     schwarze 2878:                                return ROFF_IGN;
1.164     kristaps 2879:                        }
                   2880:                        fsz = (size_t)(p - first);
                   2881:                }
                   2882:
                   2883:                second = p++;
1.238     schwarze 2884:                if (*second == '\\') {
1.164     kristaps 2885:                        esc = mandoc_escape(&p, NULL, NULL);
1.238     schwarze 2886:                        if (esc == ESCAPE_ERROR) {
1.219     schwarze 2887:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 2888:                                    ln, (int)(p - buf->buf), second);
1.277     schwarze 2889:                                return ROFF_IGN;
1.164     kristaps 2890:                        }
                   2891:                        ssz = (size_t)(p - second);
1.238     schwarze 2892:                } else if (*second == '\0') {
1.260     schwarze 2893:                        mandoc_vmsg(MANDOCERR_TR_ODD, r->parse,
                   2894:                            ln, first - buf->buf, "tr %s", first);
1.164     kristaps 2895:                        second = " ";
1.165     kristaps 2896:                        p--;
1.164     kristaps 2897:                }
                   2898:
1.167     kristaps 2899:                if (fsz > 1) {
1.207     schwarze 2900:                        roff_setstrn(&r->xmbtab, first, fsz,
                   2901:                            second, ssz, 0);
1.167     kristaps 2902:                        continue;
                   2903:                }
                   2904:
1.238     schwarze 2905:                if (r->xtab == NULL)
1.207     schwarze 2906:                        r->xtab = mandoc_calloc(128,
                   2907:                            sizeof(struct roffstr));
1.167     kristaps 2908:
                   2909:                free(r->xtab[(int)*first].p);
                   2910:                r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
                   2911:                r->xtab[(int)*first].sz = ssz;
1.164     kristaps 2912:        }
                   2913:
1.277     schwarze 2914:        return ROFF_IGN;
1.164     kristaps 2915: }
                   2916:
                   2917: static enum rofferr
1.105     kristaps 2918: roff_so(ROFF_ARGS)
                   2919: {
1.249     schwarze 2920:        char *name, *cp;
1.105     kristaps 2921:
1.238     schwarze 2922:        name = buf->buf + pos;
1.224     schwarze 2923:        mandoc_vmsg(MANDOCERR_SO, r->parse, ln, ppos, "so %s", name);
1.105     kristaps 2924:
                   2925:        /*
                   2926:         * Handle `so'.  Be EXTREMELY careful, as we shouldn't be
                   2927:         * opening anything that's not in our cwd or anything beneath
                   2928:         * it.  Thus, explicitly disallow traversing up the file-system
                   2929:         * or using absolute paths.
                   2930:         */
                   2931:
1.238     schwarze 2932:        if (*name == '/' || strstr(name, "../") || strstr(name, "/..")) {
1.210     schwarze 2933:                mandoc_vmsg(MANDOCERR_SO_PATH, r->parse, ln, ppos,
                   2934:                    ".so %s", name);
1.249     schwarze 2935:                buf->sz = mandoc_asprintf(&cp,
                   2936:                    ".sp\nSee the file %s.\n.sp", name) + 1;
                   2937:                free(buf->buf);
                   2938:                buf->buf = cp;
                   2939:                *offs = 0;
1.277     schwarze 2940:                return ROFF_REPARSE;
1.105     kristaps 2941:        }
                   2942:
                   2943:        *offs = pos;
1.277     schwarze 2944:        return ROFF_SO;
1.105     kristaps 2945: }
1.92      schwarze 2946:
1.266     schwarze 2947: /* --- user defined strings and macros ------------------------------------ */
                   2948:
1.106     kristaps 2949: static enum rofferr
                   2950: roff_userdef(ROFF_ARGS)
1.99      kristaps 2951: {
1.263     schwarze 2952:        const char       *arg[9], *ap;
1.106     kristaps 2953:        char             *cp, *n1, *n2;
1.292     schwarze 2954:        int               expand_count, i, ib, ie;
1.263     schwarze 2955:        size_t            asz, rsz;
1.106     kristaps 2956:
                   2957:        /*
                   2958:         * Collect pointers to macro argument strings
1.188     schwarze 2959:         * and NUL-terminate them.
1.106     kristaps 2960:         */
1.263     schwarze 2961:
1.273     schwarze 2962:        r->argc = 0;
1.238     schwarze 2963:        cp = buf->buf + pos;
1.273     schwarze 2964:        for (i = 0; i < 9; i++) {
                   2965:                if (*cp == '\0')
                   2966:                        arg[i] = "";
                   2967:                else {
                   2968:                        arg[i] = mandoc_getarg(r->parse, &cp, ln, &pos);
                   2969:                        r->argc = i + 1;
                   2970:                }
                   2971:        }
1.99      kristaps 2972:
1.106     kristaps 2973:        /*
                   2974:         * Expand macro arguments.
1.99      kristaps 2975:         */
1.263     schwarze 2976:
                   2977:        buf->sz = strlen(r->current_string) + 1;
1.292     schwarze 2978:        n1 = n2 = cp = mandoc_malloc(buf->sz);
1.263     schwarze 2979:        memcpy(n1, r->current_string, buf->sz);
1.292     schwarze 2980:        expand_count = 0;
1.263     schwarze 2981:        while (*cp != '\0') {
                   2982:
                   2983:                /* Scan ahead for the next argument invocation. */
                   2984:
                   2985:                if (*cp++ != '\\')
                   2986:                        continue;
                   2987:                if (*cp++ != '$')
                   2988:                        continue;
1.274     schwarze 2989:                if (*cp == '*') {  /* \\$* inserts all arguments */
                   2990:                        ib = 0;
                   2991:                        ie = r->argc - 1;
                   2992:                } else {  /* \\$1 .. \\$9 insert one argument */
                   2993:                        ib = ie = *cp - '1';
                   2994:                        if (ib < 0 || ib > 8)
                   2995:                                continue;
                   2996:                }
1.263     schwarze 2997:                cp -= 2;
1.292     schwarze 2998:
                   2999:                /*
                   3000:                 * Prevent infinite recursion.
                   3001:                 */
                   3002:
                   3003:                if (cp >= n2)
                   3004:                        expand_count = 1;
                   3005:                else if (++expand_count > EXPAND_LIMIT) {
                   3006:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
                   3007:                            ln, (int)(cp - n1), NULL);
1.293     schwarze 3008:                        free(buf->buf);
                   3009:                        buf->buf = n1;
1.292     schwarze 3010:                        return ROFF_IGN;
                   3011:                }
1.263     schwarze 3012:
                   3013:                /*
                   3014:                 * Determine the size of the expanded argument,
                   3015:                 * taking escaping of quotes into account.
                   3016:                 */
                   3017:
1.274     schwarze 3018:                asz = ie > ib ? ie - ib : 0;  /* for blanks */
                   3019:                for (i = ib; i <= ie; i++) {
                   3020:                        for (ap = arg[i]; *ap != '\0'; ap++) {
                   3021:                                asz++;
                   3022:                                if (*ap == '"')
                   3023:                                        asz += 3;
                   3024:                        }
1.263     schwarze 3025:                }
                   3026:                if (asz != 3) {
                   3027:
                   3028:                        /*
                   3029:                         * Determine the size of the rest of the
                   3030:                         * unexpanded macro, including the NUL.
                   3031:                         */
                   3032:
                   3033:                        rsz = buf->sz - (cp - n1) - 3;
                   3034:
                   3035:                        /*
                   3036:                         * When shrinking, move before
                   3037:                         * releasing the storage.
                   3038:                         */
                   3039:
                   3040:                        if (asz < 3)
                   3041:                                memmove(cp + asz, cp + 3, rsz);
                   3042:
                   3043:                        /*
                   3044:                         * Resize the storage for the macro
                   3045:                         * and readjust the parse pointer.
                   3046:                         */
                   3047:
                   3048:                        buf->sz += asz - 3;
                   3049:                        n2 = mandoc_realloc(n1, buf->sz);
                   3050:                        cp = n2 + (cp - n1);
                   3051:                        n1 = n2;
                   3052:
                   3053:                        /*
                   3054:                         * When growing, make room
                   3055:                         * for the expanded argument.
                   3056:                         */
                   3057:
                   3058:                        if (asz > 3)
                   3059:                                memmove(cp + asz, cp + 3, rsz);
                   3060:                }
                   3061:
                   3062:                /* Copy the expanded argument, escaping quotes. */
                   3063:
                   3064:                n2 = cp;
1.274     schwarze 3065:                for (i = ib; i <= ie; i++) {
                   3066:                        for (ap = arg[i]; *ap != '\0'; ap++) {
                   3067:                                if (*ap == '"') {
                   3068:                                        memcpy(n2, "\\(dq", 4);
                   3069:                                        n2 += 4;
                   3070:                                } else
                   3071:                                        *n2++ = *ap;
                   3072:                        }
                   3073:                        if (i < ie)
                   3074:                                *n2++ = ' ';
1.106     kristaps 3075:                }
1.99      kristaps 3076:        }
                   3077:
1.106     kristaps 3078:        /*
                   3079:         * Replace the macro invocation
                   3080:         * by the expanded macro.
                   3081:         */
1.263     schwarze 3082:
1.238     schwarze 3083:        free(buf->buf);
                   3084:        buf->buf = n1;
1.248     schwarze 3085:        *offs = 0;
1.106     kristaps 3086:
1.277     schwarze 3087:        return buf->sz > 1 && buf->buf[buf->sz - 2] == '\n' ?
                   3088:           ROFF_REPARSE : ROFF_APPEND;
1.99      kristaps 3089: }
1.121     schwarze 3090:
1.212     schwarze 3091: static size_t
1.121     schwarze 3092: roff_getname(struct roff *r, char **cpp, int ln, int pos)
                   3093: {
                   3094:        char     *name, *cp;
1.212     schwarze 3095:        size_t    namesz;
1.121     schwarze 3096:
                   3097:        name = *cpp;
                   3098:        if ('\0' == *name)
1.277     schwarze 3099:                return 0;
1.121     schwarze 3100:
1.212     schwarze 3101:        /* Read until end of name and terminate it with NUL. */
                   3102:        for (cp = name; 1; cp++) {
                   3103:                if ('\0' == *cp || ' ' == *cp) {
                   3104:                        namesz = cp - name;
                   3105:                        break;
                   3106:                }
1.121     schwarze 3107:                if ('\\' != *cp)
                   3108:                        continue;
1.215     schwarze 3109:                namesz = cp - name;
                   3110:                if ('{' == cp[1] || '}' == cp[1])
                   3111:                        break;
1.121     schwarze 3112:                cp++;
                   3113:                if ('\\' == *cp)
                   3114:                        continue;
1.224     schwarze 3115:                mandoc_vmsg(MANDOCERR_NAMESC, r->parse, ln, pos,
                   3116:                    "%.*s", (int)(cp - name + 1), name);
1.212     schwarze 3117:                mandoc_escape((const char **)&cp, NULL, NULL);
                   3118:                break;
1.121     schwarze 3119:        }
                   3120:
                   3121:        /* Read past spaces. */
                   3122:        while (' ' == *cp)
                   3123:                cp++;
                   3124:
                   3125:        *cpp = cp;
1.277     schwarze 3126:        return namesz;
1.121     schwarze 3127: }
                   3128:
1.106     kristaps 3129: /*
                   3130:  * Store *string into the user-defined string called *name.
                   3131:  * To clear an existing entry, call with (*r, *name, NULL, 0).
1.193     schwarze 3132:  * append == 0: replace mode
                   3133:  * append == 1: single-line append mode
                   3134:  * append == 2: multiline append mode, append '\n' after each call
1.106     kristaps 3135:  */
1.94      kristaps 3136: static void
1.106     kristaps 3137: roff_setstr(struct roff *r, const char *name, const char *string,
1.193     schwarze 3138:        int append)
1.92      schwarze 3139: {
1.164     kristaps 3140:
                   3141:        roff_setstrn(&r->strtab, name, strlen(name), string,
1.207     schwarze 3142:            string ? strlen(string) : 0, append);
1.164     kristaps 3143: }
                   3144:
                   3145: static void
1.166     kristaps 3146: roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
1.193     schwarze 3147:                const char *string, size_t stringsz, int append)
1.164     kristaps 3148: {
1.166     kristaps 3149:        struct roffkv   *n;
1.164     kristaps 3150:        char            *c;
                   3151:        int              i;
                   3152:        size_t           oldch, newch;
1.92      schwarze 3153:
1.106     kristaps 3154:        /* Search for an existing string with the same name. */
1.164     kristaps 3155:        n = *r;
                   3156:
1.211     schwarze 3157:        while (n && (namesz != n->key.sz ||
                   3158:                        strncmp(n->key.p, name, namesz)))
1.92      schwarze 3159:                n = n->next;
1.94      kristaps 3160:
                   3161:        if (NULL == n) {
1.106     kristaps 3162:                /* Create a new string table entry. */
1.166     kristaps 3163:                n = mandoc_malloc(sizeof(struct roffkv));
                   3164:                n->key.p = mandoc_strndup(name, namesz);
                   3165:                n->key.sz = namesz;
                   3166:                n->val.p = NULL;
                   3167:                n->val.sz = 0;
1.164     kristaps 3168:                n->next = *r;
                   3169:                *r = n;
1.193     schwarze 3170:        } else if (0 == append) {
1.166     kristaps 3171:                free(n->val.p);
                   3172:                n->val.p = NULL;
                   3173:                n->val.sz = 0;
1.106     kristaps 3174:        }
                   3175:
                   3176:        if (NULL == string)
                   3177:                return;
                   3178:
                   3179:        /*
                   3180:         * One additional byte for the '\n' in multiline mode,
                   3181:         * and one for the terminating '\0'.
                   3182:         */
1.193     schwarze 3183:        newch = stringsz + (1 < append ? 2u : 1u);
1.164     kristaps 3184:
1.166     kristaps 3185:        if (NULL == n->val.p) {
                   3186:                n->val.p = mandoc_malloc(newch);
                   3187:                *n->val.p = '\0';
1.106     kristaps 3188:                oldch = 0;
                   3189:        } else {
1.166     kristaps 3190:                oldch = n->val.sz;
                   3191:                n->val.p = mandoc_realloc(n->val.p, oldch + newch);
1.106     kristaps 3192:        }
                   3193:
                   3194:        /* Skip existing content in the destination buffer. */
1.166     kristaps 3195:        c = n->val.p + (int)oldch;
1.106     kristaps 3196:
                   3197:        /* Append new content to the destination buffer. */
1.164     kristaps 3198:        i = 0;
                   3199:        while (i < (int)stringsz) {
1.106     kristaps 3200:                /*
                   3201:                 * Rudimentary roff copy mode:
                   3202:                 * Handle escaped backslashes.
                   3203:                 */
1.164     kristaps 3204:                if ('\\' == string[i] && '\\' == string[i + 1])
                   3205:                        i++;
                   3206:                *c++ = string[i++];
1.106     kristaps 3207:        }
1.94      kristaps 3208:
1.106     kristaps 3209:        /* Append terminating bytes. */
1.193     schwarze 3210:        if (1 < append)
1.106     kristaps 3211:                *c++ = '\n';
1.163     kristaps 3212:
1.106     kristaps 3213:        *c = '\0';
1.166     kristaps 3214:        n->val.sz = (int)(c - n->val.p);
1.92      schwarze 3215: }
                   3216:
1.94      kristaps 3217: static const char *
                   3218: roff_getstrn(const struct roff *r, const char *name, size_t len)
1.92      schwarze 3219: {
1.166     kristaps 3220:        const struct roffkv *n;
1.191     schwarze 3221:        int i;
1.92      schwarze 3222:
1.164     kristaps 3223:        for (n = r->strtab; n; n = n->next)
1.207     schwarze 3224:                if (0 == strncmp(name, n->key.p, len) &&
                   3225:                    '\0' == n->key.p[(int)len])
1.277     schwarze 3226:                        return n->val.p;
1.191     schwarze 3227:
                   3228:        for (i = 0; i < PREDEFS_MAX; i++)
                   3229:                if (0 == strncmp(name, predefs[i].name, len) &&
                   3230:                                '\0' == predefs[i].name[(int)len])
1.277     schwarze 3231:                        return predefs[i].str;
1.94      kristaps 3232:
1.277     schwarze 3233:        return NULL;
1.92      schwarze 3234: }
                   3235:
1.94      kristaps 3236: static void
1.167     kristaps 3237: roff_freestr(struct roffkv *r)
1.92      schwarze 3238: {
1.166     kristaps 3239:        struct roffkv    *n, *nn;
1.92      schwarze 3240:
1.167     kristaps 3241:        for (n = r; n; n = nn) {
1.166     kristaps 3242:                free(n->key.p);
                   3243:                free(n->val.p);
1.92      schwarze 3244:                nn = n->next;
                   3245:                free(n);
                   3246:        }
1.114     kristaps 3247: }
1.266     schwarze 3248:
                   3249: /* --- accessors and utility functions ------------------------------------ */
1.114     kristaps 3250:
                   3251: const struct tbl_span *
                   3252: roff_span(const struct roff *r)
                   3253: {
1.207     schwarze 3254:
1.277     schwarze 3255:        return r->tbl ? tbl_span(r->tbl) : NULL;
1.125     kristaps 3256: }
                   3257:
                   3258: const struct eqn *
                   3259: roff_eqn(const struct roff *r)
                   3260: {
1.207     schwarze 3261:
1.277     schwarze 3262:        return r->last_eqn ? &r->last_eqn->eqn : NULL;
1.164     kristaps 3263: }
                   3264:
                   3265: /*
                   3266:  * Duplicate an input string, making the appropriate character
                   3267:  * conversations (as stipulated by `tr') along the way.
                   3268:  * Returns a heap-allocated string with all the replacements made.
                   3269:  */
                   3270: char *
                   3271: roff_strdup(const struct roff *r, const char *p)
                   3272: {
1.166     kristaps 3273:        const struct roffkv *cp;
1.164     kristaps 3274:        char            *res;
                   3275:        const char      *pp;
                   3276:        size_t           ssz, sz;
                   3277:        enum mandoc_esc  esc;
                   3278:
1.167     kristaps 3279:        if (NULL == r->xmbtab && NULL == r->xtab)
1.277     schwarze 3280:                return mandoc_strdup(p);
1.164     kristaps 3281:        else if ('\0' == *p)
1.277     schwarze 3282:                return mandoc_strdup("");
1.164     kristaps 3283:
                   3284:        /*
                   3285:         * Step through each character looking for term matches
                   3286:         * (remember that a `tr' can be invoked with an escape, which is
                   3287:         * a glyph but the escape is multi-character).
                   3288:         * We only do this if the character hash has been initialised
                   3289:         * and the string is >0 length.
                   3290:         */
                   3291:
                   3292:        res = NULL;
                   3293:        ssz = 0;
                   3294:
                   3295:        while ('\0' != *p) {
1.289     schwarze 3296:                assert((unsigned int)*p < 128);
                   3297:                if ('\\' != *p && r->xtab && r->xtab[(unsigned int)*p].p) {
1.167     kristaps 3298:                        sz = r->xtab[(int)*p].sz;
                   3299:                        res = mandoc_realloc(res, ssz + sz + 1);
                   3300:                        memcpy(res + ssz, r->xtab[(int)*p].p, sz);
                   3301:                        ssz += sz;
                   3302:                        p++;
                   3303:                        continue;
                   3304:                } else if ('\\' != *p) {
                   3305:                        res = mandoc_realloc(res, ssz + 2);
                   3306:                        res[ssz++] = *p++;
                   3307:                        continue;
                   3308:                }
                   3309:
1.164     kristaps 3310:                /* Search for term matches. */
1.167     kristaps 3311:                for (cp = r->xmbtab; cp; cp = cp->next)
1.166     kristaps 3312:                        if (0 == strncmp(p, cp->key.p, cp->key.sz))
1.164     kristaps 3313:                                break;
                   3314:
                   3315:                if (NULL != cp) {
                   3316:                        /*
                   3317:                         * A match has been found.
                   3318:                         * Append the match to the array and move
                   3319:                         * forward by its keysize.
                   3320:                         */
1.207     schwarze 3321:                        res = mandoc_realloc(res,
                   3322:                            ssz + cp->val.sz + 1);
1.166     kristaps 3323:                        memcpy(res + ssz, cp->val.p, cp->val.sz);
                   3324:                        ssz += cp->val.sz;
                   3325:                        p += (int)cp->key.sz;
1.164     kristaps 3326:                        continue;
                   3327:                }
                   3328:
1.167     kristaps 3329:                /*
                   3330:                 * Handle escapes carefully: we need to copy
                   3331:                 * over just the escape itself, or else we might
                   3332:                 * do replacements within the escape itself.
                   3333:                 * Make sure to pass along the bogus string.
                   3334:                 */
                   3335:                pp = p++;
                   3336:                esc = mandoc_escape(&p, NULL, NULL);
                   3337:                if (ESCAPE_ERROR == esc) {
                   3338:                        sz = strlen(pp);
1.164     kristaps 3339:                        res = mandoc_realloc(res, ssz + sz + 1);
                   3340:                        memcpy(res + ssz, pp, sz);
1.167     kristaps 3341:                        break;
1.164     kristaps 3342:                }
1.207     schwarze 3343:                /*
                   3344:                 * We bail out on bad escapes.
1.167     kristaps 3345:                 * No need to warn: we already did so when
                   3346:                 * roff_res() was called.
                   3347:                 */
                   3348:                sz = (int)(p - pp);
                   3349:                res = mandoc_realloc(res, ssz + sz + 1);
                   3350:                memcpy(res + ssz, pp, sz);
                   3351:                ssz += sz;
1.164     kristaps 3352:        }
                   3353:
                   3354:        res[(int)ssz] = '\0';
1.277     schwarze 3355:        return res;
1.227     schwarze 3356: }
                   3357:
                   3358: int
                   3359: roff_getformat(const struct roff *r)
                   3360: {
                   3361:
1.277     schwarze 3362:        return r->format;
1.174     kristaps 3363: }
                   3364:
                   3365: /*
1.207     schwarze 3366:  * Find out whether a line is a macro line or not.
1.174     kristaps 3367:  * If it is, adjust the current position and return one; if it isn't,
                   3368:  * return zero and don't change the current position.
                   3369:  * If the control character has been set with `.cc', then let that grain
                   3370:  * precedence.
                   3371:  * This is slighly contrary to groff, where using the non-breaking
                   3372:  * control character when `cc' has been invoked will cause the
                   3373:  * non-breaking macro contents to be printed verbatim.
                   3374:  */
                   3375: int
                   3376: roff_getcontrol(const struct roff *r, const char *cp, int *ppos)
                   3377: {
                   3378:        int             pos;
                   3379:
                   3380:        pos = *ppos;
                   3381:
                   3382:        if (0 != r->control && cp[pos] == r->control)
                   3383:                pos++;
                   3384:        else if (0 != r->control)
1.277     schwarze 3385:                return 0;
1.174     kristaps 3386:        else if ('\\' == cp[pos] && '.' == cp[pos + 1])
                   3387:                pos += 2;
                   3388:        else if ('.' == cp[pos] || '\'' == cp[pos])
                   3389:                pos++;
                   3390:        else
1.277     schwarze 3391:                return 0;
1.174     kristaps 3392:
                   3393:        while (' ' == cp[pos] || '\t' == cp[pos])
                   3394:                pos++;
                   3395:
                   3396:        *ppos = pos;
1.277     schwarze 3397:        return 1;
1.74      kristaps 3398: }

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