[BACK]Return to roff.c CVS log [TXT][DIR] Up to [cvsweb.bsd.lv] / mandoc

Annotation of mandoc/roff.c, Revision 1.294

1.294   ! schwarze    1: /*     $Id: roff.c,v 1.293 2017/03/09 15:29:35 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>
1.178     schwarze   25: #include <stdio.h>
1.1       kristaps   26: #include <stdlib.h>
1.67      kristaps   27: #include <string.h>
1.1       kristaps   28:
1.67      kristaps   29: #include "mandoc.h"
1.201     schwarze   30: #include "mandoc_aux.h"
1.265     schwarze   31: #include "roff.h"
1.226     schwarze   32: #include "libmandoc.h"
1.266     schwarze   33: #include "roff_int.h"
1.109     kristaps   34: #include "libroff.h"
1.82      kristaps   35:
1.170     schwarze   36: /* Maximum number of string expansions per line, to break infinite loops. */
                     37: #define        EXPAND_LIMIT    1000
                     38:
1.266     schwarze   39: /* --- data types --------------------------------------------------------- */
                     40:
1.147     kristaps   41: /*
1.167     kristaps   42:  * An incredibly-simple string buffer.
                     43:  */
1.94      kristaps   44: struct roffstr {
1.167     kristaps   45:        char            *p; /* nil-terminated buffer */
                     46:        size_t           sz; /* saved strlen(p) */
1.166     kristaps   47: };
                     48:
                     49: /*
1.167     kristaps   50:  * A key-value roffstr pair as part of a singly-linked list.
1.166     kristaps   51:  */
                     52: struct roffkv {
                     53:        struct roffstr   key;
                     54:        struct roffstr   val;
                     55:        struct roffkv   *next; /* next in list */
1.94      kristaps   56: };
                     57:
1.180     schwarze   58: /*
                     59:  * A single number register as part of a singly-linked list.
                     60:  */
                     61: struct roffreg {
                     62:        struct roffstr   key;
1.181     schwarze   63:        int              val;
1.180     schwarze   64:        struct roffreg  *next;
                     65: };
                     66:
1.67      kristaps   67: struct roff {
1.128     kristaps   68:        struct mparse   *parse; /* parse point */
1.67      kristaps   69:        struct roffnode *last; /* leaf of stack */
1.223     schwarze   70:        int             *rstack; /* stack of inverted `ie' values */
1.180     schwarze   71:        struct roffreg  *regtab; /* number registers */
1.166     kristaps   72:        struct roffkv   *strtab; /* user-defined strings & macros */
1.167     kristaps   73:        struct roffkv   *xmbtab; /* multi-byte trans table (`tr') */
                     74:        struct roffstr  *xtab; /* single-byte trans table (`tr') */
1.106     kristaps   75:        const char      *current_string; /* value of last called user macro */
1.118     kristaps   76:        struct tbl_node *first_tbl; /* first table parsed */
                     77:        struct tbl_node *last_tbl; /* last table parsed */
                     78:        struct tbl_node *tbl; /* current table being parsed */
1.125     kristaps   79:        struct eqn_node *last_eqn; /* last equation parsed */
                     80:        struct eqn_node *first_eqn; /* first equation parsed */
                     81:        struct eqn_node *eqn; /* current equation being parsed */
1.230     schwarze   82:        int              eqn_inline; /* current equation is inline */
1.223     schwarze   83:        int              options; /* parse options */
                     84:        int              rstacksz; /* current size limit of rstack */
                     85:        int              rstackpos; /* position in rstack */
1.227     schwarze   86:        int              format; /* current file in mdoc or man format */
1.273     schwarze   87:        int              argc; /* number of args of the last macro */
1.223     schwarze   88:        char             control; /* control character */
1.79      kristaps   89: };
                     90:
1.67      kristaps   91: struct roffnode {
1.294   ! schwarze   92:        enum roff_tok    tok; /* type of node */
1.67      kristaps   93:        struct roffnode *parent; /* up one in stack */
                     94:        int              line; /* parse line */
                     95:        int              col; /* parse col */
1.106     kristaps   96:        char            *name; /* node name, e.g. macro name */
1.79      kristaps   97:        char            *end; /* end-rules: custom token */
                     98:        int              endspan; /* end-rules: next-line or infty */
1.198     schwarze   99:        int              rule; /* current evaluation rule */
1.67      kristaps  100: };
                    101:
                    102: #define        ROFF_ARGS        struct roff *r, /* parse ctx */ \
1.294   ! schwarze  103:                         enum roff_tok tok, /* tok of macro */ \
1.238     schwarze  104:                         struct buf *buf, /* input buffer */ \
1.67      kristaps  105:                         int ln, /* parse line */ \
1.75      kristaps  106:                         int ppos, /* original pos in buffer */ \
                    107:                         int pos, /* current pos in buffer */ \
1.74      kristaps  108:                         int *offs /* reset offset of buffer data */
1.67      kristaps  109:
                    110: typedef        enum rofferr (*roffproc)(ROFF_ARGS);
                    111:
                    112: struct roffmac {
                    113:        const char      *name; /* macro name */
1.79      kristaps  114:        roffproc         proc; /* process new macro */
                    115:        roffproc         text; /* process as child text of macro */
                    116:        roffproc         sub; /* process as child of macro */
                    117:        int              flags;
                    118: #define        ROFFMAC_STRUCT  (1 << 0) /* always interpret */
1.85      kristaps  119:        struct roffmac  *next;
1.67      kristaps  120: };
                    121:
1.141     kristaps  122: struct predef {
                    123:        const char      *name; /* predefined input name */
                    124:        const char      *str; /* replacement symbol */
                    125: };
                    126:
                    127: #define        PREDEF(__name, __str) \
                    128:        { (__name), (__str) },
                    129:
1.266     schwarze  130: /* --- function prototypes ------------------------------------------------ */
                    131:
1.294   ! schwarze  132: static enum roff_tok    roffhash_find(const char *, size_t);
1.155     kristaps  133: static void             roffhash_init(void);
                    134: static void             roffnode_cleanscope(struct roff *);
                    135: static void             roffnode_pop(struct roff *);
1.294   ! schwarze  136: static void             roffnode_push(struct roff *, enum roff_tok,
1.155     kristaps  137:                                const char *, int, int);
1.80      kristaps  138: static enum rofferr     roff_block(ROFF_ARGS);
                    139: static enum rofferr     roff_block_text(ROFF_ARGS);
                    140: static enum rofferr     roff_block_sub(ROFF_ARGS);
1.251     schwarze  141: static enum rofferr     roff_brp(ROFF_ARGS);
1.80      kristaps  142: static enum rofferr     roff_cblock(ROFF_ARGS);
1.174     kristaps  143: static enum rofferr     roff_cc(ROFF_ARGS);
1.195     schwarze  144: static void             roff_ccond(struct roff *, int, int);
1.82      kristaps  145: static enum rofferr     roff_cond(ROFF_ARGS);
                    146: static enum rofferr     roff_cond_text(ROFF_ARGS);
                    147: static enum rofferr     roff_cond_sub(ROFF_ARGS);
1.92      schwarze  148: static enum rofferr     roff_ds(ROFF_ARGS);
1.238     schwarze  149: static enum rofferr     roff_eqndelim(struct roff *, struct buf *, int);
1.271     schwarze  150: static int              roff_evalcond(struct roff *r, int, char *, int *);
1.234     kristaps  151: static int              roff_evalnum(struct roff *, int,
                    152:                                const char *, int *, int *, int);
                    153: static int              roff_evalpar(struct roff *, int,
1.261     schwarze  154:                                const char *, int *, int *, int);
1.198     schwarze  155: static int              roff_evalstrcond(const char *, int *);
1.155     kristaps  156: static void             roff_free1(struct roff *);
1.180     schwarze  157: static void             roff_freereg(struct roffreg *);
1.167     kristaps  158: static void             roff_freestr(struct roffkv *);
1.212     schwarze  159: static size_t           roff_getname(struct roff *, char **, int, int);
1.261     schwarze  160: static int              roff_getnum(const char *, int *, int *, int);
1.184     schwarze  161: static int              roff_getop(const char *, int *, char *);
1.181     schwarze  162: static int              roff_getregn(const struct roff *,
                    163:                                const char *, size_t);
1.273     schwarze  164: static int              roff_getregro(const struct roff *,
                    165:                                const char *name);
1.207     schwarze  166: static const char      *roff_getstrn(const struct roff *,
1.94      kristaps  167:                                const char *, size_t);
1.271     schwarze  168: static int              roff_hasregn(const struct roff *,
                    169:                                const char *, size_t);
1.251     schwarze  170: static enum rofferr     roff_insec(ROFF_ARGS);
1.178     schwarze  171: static enum rofferr     roff_it(ROFF_ARGS);
1.103     kristaps  172: static enum rofferr     roff_line_ignore(ROFF_ARGS);
1.265     schwarze  173: static void             roff_man_alloc1(struct roff_man *);
                    174: static void             roff_man_free1(struct roff_man *);
1.89      kristaps  175: static enum rofferr     roff_nr(ROFF_ARGS);
1.294   ! schwarze  176: static enum roff_tok    roff_parse(struct roff *, char *, int *,
1.214     schwarze  177:                                int, int);
1.238     schwarze  178: static enum rofferr     roff_parsetext(struct buf *, int, int *);
                    179: static enum rofferr     roff_res(struct roff *, struct buf *, int, int);
1.122     schwarze  180: static enum rofferr     roff_rm(ROFF_ARGS);
1.203     schwarze  181: static enum rofferr     roff_rr(ROFF_ARGS);
1.94      kristaps  182: static void             roff_setstr(struct roff *,
1.106     kristaps  183:                                const char *, const char *, int);
1.207     schwarze  184: static void             roff_setstrn(struct roffkv **, const char *,
1.164     kristaps  185:                                size_t, const char *, size_t, int);
1.105     kristaps  186: static enum rofferr     roff_so(ROFF_ARGS);
1.164     kristaps  187: static enum rofferr     roff_tr(ROFF_ARGS);
1.175     schwarze  188: static enum rofferr     roff_Dd(ROFF_ARGS);
                    189: static enum rofferr     roff_TH(ROFF_ARGS);
1.109     kristaps  190: static enum rofferr     roff_TE(ROFF_ARGS);
                    191: static enum rofferr     roff_TS(ROFF_ARGS);
1.125     kristaps  192: static enum rofferr     roff_EQ(ROFF_ARGS);
                    193: static enum rofferr     roff_EN(ROFF_ARGS);
1.112     kristaps  194: static enum rofferr     roff_T_(ROFF_ARGS);
1.251     schwarze  195: static enum rofferr     roff_unsupp(ROFF_ARGS);
1.106     kristaps  196: static enum rofferr     roff_userdef(ROFF_ARGS);
1.67      kristaps  197:
1.266     schwarze  198: /* --- constant data ------------------------------------------------------ */
                    199:
1.155     kristaps  200: /* See roffhash_find() */
1.85      kristaps  201:
                    202: #define        ASCII_HI         126
                    203: #define        ASCII_LO         33
                    204: #define        HASHWIDTH       (ASCII_HI - ASCII_LO + 1)
                    205:
1.261     schwarze  206: #define        ROFFNUM_SCALE   (1 << 0)  /* Honour scaling in roff_getnum(). */
                    207: #define        ROFFNUM_WHITE   (1 << 1)  /* Skip whitespace in roff_evalnum(). */
                    208:
1.294   ! schwarze  209: const char *__roff_name[MAN_MAX + 1] = {
        !           210:        "ab",           "ad",           "af",           "aln",
        !           211:        "als",          "am",           "am1",          "ami",
        !           212:        "ami1",         "as",           "as1",          "asciify",
        !           213:        "backtrace",    "bd",           "bleedat",      "blm",
        !           214:         "box",         "boxa",         "bp",           "BP",
        !           215:        "break",        "breakchar",    "brnl",         "brp",
        !           216:        "brpnl",        "c2",           "cc",           "ce",
        !           217:        "cf",           "cflags",       "ch",           "char",
        !           218:        "chop",         "class",        "close",        "CL",
        !           219:        "color",        "composite",    "continue",     "cp",
        !           220:        "cropat",       "cs",           "cu",           "da",
        !           221:        "dch",          "Dd",           "de",           "de1",
        !           222:        "defcolor",     "dei",          "dei1",         "device",
        !           223:        "devicem",      "di",           "do",           "ds",
        !           224:        "ds1",          "dwh",          "dt",           "ec",
        !           225:        "ecr",          "ecs",          "el",           "em",
        !           226:        "EN",           "eo",           "EP",           "EQ",
        !           227:        "errprint",     "ev",           "evc",          "ex",
        !           228:        "fallback",     "fam",          "fc",           "fchar",
        !           229:        "fcolor",       "fdeferlig",    "feature",      "fkern",
        !           230:        "fl",           "flig",         "fp",           "fps",
        !           231:        "fschar",       "fspacewidth",  "fspecial",     "ftr",
        !           232:        "fzoom",        "gcolor",       "hc",           "hcode",
        !           233:        "hidechar",     "hla",          "hlm",          "hpf",
        !           234:        "hpfa",         "hpfcode",      "hw",           "hy",
        !           235:        "hylang",       "hylen",        "hym",          "hypp",
        !           236:        "hys",          "ie",           "if",           "ig",
        !           237:        "index",        "it",           "itc",          "IX",
        !           238:        "kern",         "kernafter",    "kernbefore",   "kernpair",
        !           239:        "lc",           "lc_ctype",     "lds",          "length",
        !           240:        "letadj",       "lf",           "lg",           "lhang",
        !           241:        "linetabs",     "lnr",          "lnrf",         "lpfx",
        !           242:        "ls",           "lsm",          "lt",           "mc",
        !           243:        "mediasize",    "minss",        "mk",           "mso",
        !           244:        "na",           "ne",           "nh",           "nhychar",
        !           245:        "nm",           "nn",           "nop",          "nr",
        !           246:        "nrf",          "nroff",        "ns",           "nx",
        !           247:        "open",         "opena",        "os",           "output",
        !           248:        "padj",         "papersize",    "pc",           "pev",
        !           249:        "pi",           "PI",           "pl",           "pm",
        !           250:        "pn",           "pnr",          "po",           "ps",
        !           251:        "psbb",         "pshape",       "pso",          "ptr",
        !           252:        "pvs",          "rchar",        "rd",           "recursionlimit",
        !           253:        "return",       "rfschar",      "rhang",        "rj",
        !           254:        "rm",           "rn",           "rnn",          "rr",
        !           255:        "rs",           "rt",           "schar",        "sentchar",
        !           256:        "shc",          "shift",        "sizes",        "so",
        !           257:        "spacewidth",   "special",      "spreadwarn",   "ss",
        !           258:        "sty",          "substring",    "sv",           "sy",
        !           259:        "T&",           "ta",           "tc",           "TE",
        !           260:        "TH",           "ti",           "tkf",          "tl",
        !           261:        "tm",           "tm1",          "tmc",          "tr",
        !           262:        "track",        "transchar",    "trf",          "trimat",
        !           263:        "trin",         "trnt",         "troff",        "TS",
        !           264:        "uf",           "ul",           "unformat",     "unwatch",
        !           265:        "unwatchn",     "vpt",          "vs",           "warn",
        !           266:        "warnscale",    "watch",        "watchlength",  "watchn",
        !           267:        "wh",           "while",        "write",        "writec",
        !           268:        "writem",       "xflag",        ".",            NULL,
        !           269:        "text",
        !           270:        "Dd",           "Dt",           "Os",           "Sh",
        !           271:        "Ss",           "Pp",           "D1",           "Dl",
        !           272:        "Bd",           "Ed",           "Bl",           "El",
        !           273:        "It",           "Ad",           "An",           "Ap",
        !           274:        "Ar",           "Cd",           "Cm",           "Dv",
        !           275:        "Er",           "Ev",           "Ex",           "Fa",
        !           276:        "Fd",           "Fl",           "Fn",           "Ft",
        !           277:        "Ic",           "In",           "Li",           "Nd",
        !           278:        "Nm",           "Op",           "Ot",           "Pa",
        !           279:        "Rv",           "St",           "Va",           "Vt",
        !           280:        "Xr",           "%A",           "%B",           "%D",
        !           281:        "%I",           "%J",           "%N",           "%O",
        !           282:        "%P",           "%R",           "%T",           "%V",
        !           283:        "Ac",           "Ao",           "Aq",           "At",
        !           284:        "Bc",           "Bf",           "Bo",           "Bq",
        !           285:        "Bsx",          "Bx",           "Db",           "Dc",
        !           286:        "Do",           "Dq",           "Ec",           "Ef",
        !           287:        "Em",           "Eo",           "Fx",           "Ms",
        !           288:        "No",           "Ns",           "Nx",           "Ox",
        !           289:        "Pc",           "Pf",           "Po",           "Pq",
        !           290:        "Qc",           "Ql",           "Qo",           "Qq",
        !           291:        "Re",           "Rs",           "Sc",           "So",
        !           292:        "Sq",           "Sm",           "Sx",           "Sy",
        !           293:        "Tn",           "Ux",           "Xc",           "Xo",
        !           294:        "Fo",           "Fc",           "Oo",           "Oc",
        !           295:        "Bk",           "Ek",           "Bt",           "Hf",
        !           296:        "Fr",           "Ud",           "Lb",           "Lp",
        !           297:        "Lk",           "Mt",           "Brq",          "Bro",
        !           298:        "Brc",          "%C",           "Es",           "En",
        !           299:        "Dx",           "%Q",           "br",           "sp",
        !           300:        "%U",           "Ta",           "ll",           NULL,
        !           301:        "TH",           "SH",           "SS",           "TP",
        !           302:        "LP",           "PP",           "P",            "IP",
        !           303:        "HP",           "SM",           "SB",           "BI",
        !           304:        "IB",           "BR",           "RB",           "R",
        !           305:        "B",            "I",            "IR",           "RI",
        !           306:        "br",           "sp",           "nf",           "fi",
        !           307:        "RE",           "RS",           "DT",           "UC",
        !           308:        "PD",           "AT",           "in",           "ft",
        !           309:        "OP",           "EX",           "EE",           "UR",
        !           310:        "UE",           "ll",           NULL
        !           311: };
        !           312: const  char *const *roff_name = __roff_name;
        !           313:
1.85      kristaps  314: static struct roffmac  *hash[HASHWIDTH];
                    315:
1.294   ! schwarze  316: static struct roffmac   roffs[TOKEN_NONE] = {
1.251     schwarze  317:        { "ab", roff_unsupp, NULL, NULL, 0, NULL },
1.103     kristaps  318:        { "ad", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  319:        { "af", roff_line_ignore, NULL, NULL, 0, NULL },
                    320:        { "aln", roff_unsupp, NULL, NULL, 0, NULL },
                    321:        { "als", roff_unsupp, NULL, NULL, 0, NULL },
1.85      kristaps  322:        { "am", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.251     schwarze  323:        { "am1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.85      kristaps  324:        { "ami", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.251     schwarze  325:        { "ami1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.193     schwarze  326:        { "as", roff_ds, NULL, NULL, 0, NULL },
1.251     schwarze  327:        { "as1", roff_ds, NULL, NULL, 0, NULL },
                    328:        { "asciify", roff_unsupp, NULL, NULL, 0, NULL },
                    329:        { "backtrace", roff_line_ignore, NULL, NULL, 0, NULL },
                    330:        { "bd", roff_line_ignore, NULL, NULL, 0, NULL },
                    331:        { "bleedat", roff_line_ignore, NULL, NULL, 0, NULL },
                    332:        { "blm", roff_unsupp, NULL, NULL, 0, NULL },
                    333:        { "box", roff_unsupp, NULL, NULL, 0, NULL },
                    334:        { "boxa", roff_unsupp, NULL, NULL, 0, NULL },
                    335:        { "bp", roff_line_ignore, NULL, NULL, 0, NULL },
                    336:        { "BP", roff_unsupp, NULL, NULL, 0, NULL },
                    337:        { "break", roff_unsupp, NULL, NULL, 0, NULL },
                    338:        { "breakchar", roff_line_ignore, NULL, NULL, 0, NULL },
                    339:        { "brnl", roff_line_ignore, NULL, NULL, 0, NULL },
                    340:        { "brp", roff_brp, NULL, NULL, 0, NULL },
                    341:        { "brpnl", roff_line_ignore, NULL, NULL, 0, NULL },
                    342:        { "c2", roff_unsupp, NULL, NULL, 0, NULL },
1.174     kristaps  343:        { "cc", roff_cc, NULL, NULL, 0, NULL },
1.194     schwarze  344:        { "ce", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  345:        { "cf", roff_insec, NULL, NULL, 0, NULL },
                    346:        { "cflags", roff_line_ignore, NULL, NULL, 0, NULL },
                    347:        { "ch", roff_line_ignore, NULL, NULL, 0, NULL },
                    348:        { "char", roff_unsupp, NULL, NULL, 0, NULL },
                    349:        { "chop", roff_unsupp, NULL, NULL, 0, NULL },
                    350:        { "class", roff_line_ignore, NULL, NULL, 0, NULL },
                    351:        { "close", roff_insec, NULL, NULL, 0, NULL },
                    352:        { "CL", roff_unsupp, NULL, NULL, 0, NULL },
                    353:        { "color", roff_line_ignore, NULL, NULL, 0, NULL },
                    354:        { "composite", roff_unsupp, NULL, NULL, 0, NULL },
                    355:        { "continue", roff_unsupp, NULL, NULL, 0, NULL },
                    356:        { "cp", roff_line_ignore, NULL, NULL, 0, NULL },
                    357:        { "cropat", roff_line_ignore, NULL, NULL, 0, NULL },
                    358:        { "cs", roff_line_ignore, NULL, NULL, 0, NULL },
                    359:        { "cu", roff_line_ignore, NULL, NULL, 0, NULL },
                    360:        { "da", roff_unsupp, NULL, NULL, 0, NULL },
                    361:        { "dch", roff_unsupp, NULL, NULL, 0, NULL },
                    362:        { "Dd", roff_Dd, NULL, NULL, 0, NULL },
1.85      kristaps  363:        { "de", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.251     schwarze  364:        { "de1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
                    365:        { "defcolor", roff_line_ignore, NULL, NULL, 0, NULL },
1.85      kristaps  366:        { "dei", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.251     schwarze  367:        { "dei1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
                    368:        { "device", roff_unsupp, NULL, NULL, 0, NULL },
                    369:        { "devicem", roff_unsupp, NULL, NULL, 0, NULL },
                    370:        { "di", roff_unsupp, NULL, NULL, 0, NULL },
                    371:        { "do", roff_unsupp, NULL, NULL, 0, NULL },
1.92      schwarze  372:        { "ds", roff_ds, NULL, NULL, 0, NULL },
1.251     schwarze  373:        { "ds1", roff_ds, NULL, NULL, 0, NULL },
                    374:        { "dwh", roff_unsupp, NULL, NULL, 0, NULL },
                    375:        { "dt", roff_unsupp, NULL, NULL, 0, NULL },
                    376:        { "ec", roff_unsupp, NULL, NULL, 0, NULL },
                    377:        { "ecr", roff_unsupp, NULL, NULL, 0, NULL },
                    378:        { "ecs", roff_unsupp, NULL, NULL, 0, NULL },
1.85      kristaps  379:        { "el", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
1.251     schwarze  380:        { "em", roff_unsupp, NULL, NULL, 0, NULL },
                    381:        { "EN", roff_EN, NULL, NULL, 0, NULL },
                    382:        { "eo", roff_unsupp, NULL, NULL, 0, NULL },
                    383:        { "EP", roff_unsupp, NULL, NULL, 0, NULL },
                    384:        { "EQ", roff_EQ, NULL, NULL, 0, NULL },
                    385:        { "errprint", roff_line_ignore, NULL, NULL, 0, NULL },
                    386:        { "ev", roff_unsupp, NULL, NULL, 0, NULL },
                    387:        { "evc", roff_unsupp, NULL, NULL, 0, NULL },
                    388:        { "ex", roff_unsupp, NULL, NULL, 0, NULL },
                    389:        { "fallback", roff_line_ignore, NULL, NULL, 0, NULL },
1.185     schwarze  390:        { "fam", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  391:        { "fc", roff_unsupp, NULL, NULL, 0, NULL },
                    392:        { "fchar", roff_unsupp, NULL, NULL, 0, NULL },
                    393:        { "fcolor", roff_line_ignore, NULL, NULL, 0, NULL },
                    394:        { "fdeferlig", roff_line_ignore, NULL, NULL, 0, NULL },
                    395:        { "feature", roff_line_ignore, NULL, NULL, 0, NULL },
                    396:        { "fkern", roff_line_ignore, NULL, NULL, 0, NULL },
                    397:        { "fl", roff_line_ignore, NULL, NULL, 0, NULL },
                    398:        { "flig", roff_line_ignore, NULL, NULL, 0, NULL },
                    399:        { "fp", roff_line_ignore, NULL, NULL, 0, NULL },
                    400:        { "fps", roff_line_ignore, NULL, NULL, 0, NULL },
                    401:        { "fschar", roff_unsupp, NULL, NULL, 0, NULL },
                    402:        { "fspacewidth", roff_line_ignore, NULL, NULL, 0, NULL },
                    403:        { "fspecial", roff_line_ignore, NULL, NULL, 0, NULL },
                    404:        { "ftr", roff_line_ignore, NULL, NULL, 0, NULL },
                    405:        { "fzoom", roff_line_ignore, NULL, NULL, 0, NULL },
                    406:        { "gcolor", roff_line_ignore, NULL, NULL, 0, NULL },
                    407:        { "hc", roff_line_ignore, NULL, NULL, 0, NULL },
                    408:        { "hcode", roff_line_ignore, NULL, NULL, 0, NULL },
                    409:        { "hidechar", roff_line_ignore, NULL, NULL, 0, NULL },
                    410:        { "hla", roff_line_ignore, NULL, NULL, 0, NULL },
                    411:        { "hlm", roff_line_ignore, NULL, NULL, 0, NULL },
                    412:        { "hpf", roff_line_ignore, NULL, NULL, 0, NULL },
                    413:        { "hpfa", roff_line_ignore, NULL, NULL, 0, NULL },
                    414:        { "hpfcode", roff_line_ignore, NULL, NULL, 0, NULL },
1.186     schwarze  415:        { "hw", roff_line_ignore, NULL, NULL, 0, NULL },
1.103     kristaps  416:        { "hy", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  417:        { "hylang", roff_line_ignore, NULL, NULL, 0, NULL },
                    418:        { "hylen", roff_line_ignore, NULL, NULL, 0, NULL },
                    419:        { "hym", roff_line_ignore, NULL, NULL, 0, NULL },
                    420:        { "hypp", roff_line_ignore, NULL, NULL, 0, NULL },
                    421:        { "hys", roff_line_ignore, NULL, NULL, 0, NULL },
1.85      kristaps  422:        { "ie", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
                    423:        { "if", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
                    424:        { "ig", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.251     schwarze  425:        { "index", roff_unsupp, NULL, NULL, 0, NULL },
1.178     schwarze  426:        { "it", roff_it, NULL, NULL, 0, NULL },
1.251     schwarze  427:        { "itc", roff_unsupp, NULL, NULL, 0, NULL },
                    428:        { "IX", roff_line_ignore, NULL, NULL, 0, NULL },
                    429:        { "kern", roff_line_ignore, NULL, NULL, 0, NULL },
                    430:        { "kernafter", roff_line_ignore, NULL, NULL, 0, NULL },
                    431:        { "kernbefore", roff_line_ignore, NULL, NULL, 0, NULL },
                    432:        { "kernpair", roff_line_ignore, NULL, NULL, 0, NULL },
                    433:        { "lc", roff_unsupp, NULL, NULL, 0, NULL },
                    434:        { "lc_ctype", roff_unsupp, NULL, NULL, 0, NULL },
                    435:        { "lds", roff_unsupp, NULL, NULL, 0, NULL },
                    436:        { "length", roff_unsupp, NULL, NULL, 0, NULL },
                    437:        { "letadj", roff_line_ignore, NULL, NULL, 0, NULL },
                    438:        { "lf", roff_insec, NULL, NULL, 0, NULL },
                    439:        { "lg", roff_line_ignore, NULL, NULL, 0, NULL },
                    440:        { "lhang", roff_line_ignore, NULL, NULL, 0, NULL },
                    441:        { "linetabs", roff_unsupp, NULL, NULL, 0, NULL },
                    442:        { "lnr", roff_unsupp, NULL, NULL, 0, NULL },
                    443:        { "lnrf", roff_unsupp, NULL, NULL, 0, NULL },
                    444:        { "lpfx", roff_unsupp, NULL, NULL, 0, NULL },
                    445:        { "ls", roff_line_ignore, NULL, NULL, 0, NULL },
                    446:        { "lsm", roff_unsupp, NULL, NULL, 0, NULL },
                    447:        { "lt", roff_line_ignore, NULL, NULL, 0, NULL },
                    448:        { "mc", roff_line_ignore, NULL, NULL, 0, NULL },
                    449:        { "mediasize", roff_line_ignore, NULL, NULL, 0, NULL },
                    450:        { "minss", roff_line_ignore, NULL, NULL, 0, NULL },
                    451:        { "mk", roff_line_ignore, NULL, NULL, 0, NULL },
                    452:        { "mso", roff_insec, NULL, NULL, 0, NULL },
1.256     schwarze  453:        { "na", roff_line_ignore, NULL, NULL, 0, NULL },
1.103     kristaps  454:        { "ne", roff_line_ignore, NULL, NULL, 0, NULL },
                    455:        { "nh", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  456:        { "nhychar", roff_line_ignore, NULL, NULL, 0, NULL },
                    457:        { "nm", roff_unsupp, NULL, NULL, 0, NULL },
                    458:        { "nn", roff_unsupp, NULL, NULL, 0, NULL },
                    459:        { "nop", roff_unsupp, NULL, NULL, 0, NULL },
1.104     kristaps  460:        { "nr", roff_nr, NULL, NULL, 0, NULL },
1.251     schwarze  461:        { "nrf", roff_unsupp, NULL, NULL, 0, NULL },
                    462:        { "nroff", roff_line_ignore, NULL, NULL, 0, NULL },
1.124     schwarze  463:        { "ns", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  464:        { "nx", roff_insec, NULL, NULL, 0, NULL },
                    465:        { "open", roff_insec, NULL, NULL, 0, NULL },
                    466:        { "opena", roff_insec, NULL, NULL, 0, NULL },
                    467:        { "os", roff_line_ignore, NULL, NULL, 0, NULL },
                    468:        { "output", roff_unsupp, NULL, NULL, 0, NULL },
                    469:        { "padj", roff_line_ignore, NULL, NULL, 0, NULL },
                    470:        { "papersize", roff_line_ignore, NULL, NULL, 0, NULL },
                    471:        { "pc", roff_line_ignore, NULL, NULL, 0, NULL },
                    472:        { "pev", roff_line_ignore, NULL, NULL, 0, NULL },
                    473:        { "pi", roff_insec, NULL, NULL, 0, NULL },
                    474:        { "PI", roff_unsupp, NULL, NULL, 0, NULL },
1.229     schwarze  475:        { "pl", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  476:        { "pm", roff_line_ignore, NULL, NULL, 0, NULL },
                    477:        { "pn", roff_line_ignore, NULL, NULL, 0, NULL },
                    478:        { "pnr", roff_line_ignore, NULL, NULL, 0, NULL },
                    479:        { "po", roff_line_ignore, NULL, NULL, 0, NULL },
1.124     schwarze  480:        { "ps", roff_line_ignore, NULL, NULL, 0, NULL },
1.251     schwarze  481:        { "psbb", roff_unsupp, NULL, NULL, 0, NULL },
1.255     schwarze  482:        { "pshape", roff_unsupp, NULL, NULL, 0, NULL },
1.251     schwarze  483:        { "pso", roff_insec, NULL, NULL, 0, NULL },
                    484:        { "ptr", roff_line_ignore, NULL, NULL, 0, NULL },
                    485:        { "pvs", roff_line_ignore, NULL, NULL, 0, NULL },
                    486:        { "rchar", roff_unsupp, NULL, NULL, 0, NULL },
                    487:        { "rd", roff_line_ignore, NULL, NULL, 0, NULL },
                    488:        { "recursionlimit", roff_line_ignore, NULL, NULL, 0, NULL },
                    489:        { "return", roff_unsupp, NULL, NULL, 0, NULL },
                    490:        { "rfschar", roff_unsupp, NULL, NULL, 0, NULL },
                    491:        { "rhang", roff_line_ignore, NULL, NULL, 0, NULL },
                    492:        { "rj", roff_line_ignore, NULL, NULL, 0, NULL },
1.122     schwarze  493:        { "rm", roff_rm, NULL, NULL, 0, NULL },
1.251     schwarze  494:        { "rn", roff_unsupp, NULL, NULL, 0, NULL },
                    495:        { "rnn", roff_unsupp, NULL, NULL, 0, NULL },
1.203     schwarze  496:        { "rr", roff_rr, NULL, NULL, 0, NULL },
1.251     schwarze  497:        { "rs", roff_line_ignore, NULL, NULL, 0, NULL },
                    498:        { "rt", roff_line_ignore, NULL, NULL, 0, NULL },
                    499:        { "schar", roff_unsupp, NULL, NULL, 0, NULL },
                    500:        { "sentchar", roff_line_ignore, NULL, NULL, 0, NULL },
                    501:        { "shc", roff_line_ignore, NULL, NULL, 0, NULL },
                    502:        { "shift", roff_unsupp, NULL, NULL, 0, NULL },
                    503:        { "sizes", roff_line_ignore, NULL, NULL, 0, NULL },
1.105     kristaps  504:        { "so", roff_so, NULL, NULL, 0, NULL },
1.251     schwarze  505:        { "spacewidth", roff_line_ignore, NULL, NULL, 0, NULL },
                    506:        { "special", roff_line_ignore, NULL, NULL, 0, NULL },
                    507:        { "spreadwarn", roff_line_ignore, NULL, NULL, 0, NULL },
                    508:        { "ss", roff_line_ignore, NULL, NULL, 0, NULL },
                    509:        { "sty", roff_line_ignore, NULL, NULL, 0, NULL },
                    510:        { "substring", roff_unsupp, NULL, NULL, 0, NULL },
                    511:        { "sv", roff_line_ignore, NULL, NULL, 0, NULL },
                    512:        { "sy", roff_insec, NULL, NULL, 0, NULL },
                    513:        { "T&", roff_T_, NULL, NULL, 0, NULL },
1.255     schwarze  514:        { "ta", roff_unsupp, NULL, NULL, 0, NULL },
1.251     schwarze  515:        { "tc", roff_unsupp, NULL, NULL, 0, NULL },
                    516:        { "TE", roff_TE, NULL, NULL, 0, NULL },
                    517:        { "TH", roff_TH, NULL, NULL, 0, NULL },
1.255     schwarze  518:        { "ti", roff_unsupp, NULL, NULL, 0, NULL },
1.251     schwarze  519:        { "tkf", roff_line_ignore, NULL, NULL, 0, NULL },
                    520:        { "tl", roff_unsupp, NULL, NULL, 0, NULL },
                    521:        { "tm", roff_line_ignore, NULL, NULL, 0, NULL },
                    522:        { "tm1", roff_line_ignore, NULL, NULL, 0, NULL },
                    523:        { "tmc", roff_line_ignore, NULL, NULL, 0, NULL },
1.164     kristaps  524:        { "tr", roff_tr, NULL, NULL, 0, NULL },
1.251     schwarze  525:        { "track", roff_line_ignore, NULL, NULL, 0, NULL },
                    526:        { "transchar", roff_line_ignore, NULL, NULL, 0, NULL },
                    527:        { "trf", roff_insec, NULL, NULL, 0, NULL },
                    528:        { "trimat", roff_line_ignore, NULL, NULL, 0, NULL },
                    529:        { "trin", roff_unsupp, NULL, NULL, 0, NULL },
                    530:        { "trnt", roff_unsupp, NULL, NULL, 0, NULL },
                    531:        { "troff", roff_line_ignore, NULL, NULL, 0, NULL },
1.109     kristaps  532:        { "TS", roff_TS, NULL, NULL, 0, NULL },
1.251     schwarze  533:        { "uf", roff_line_ignore, NULL, NULL, 0, NULL },
                    534:        { "ul", roff_line_ignore, NULL, NULL, 0, NULL },
                    535:        { "unformat", roff_unsupp, NULL, NULL, 0, NULL },
                    536:        { "unwatch", roff_line_ignore, NULL, NULL, 0, NULL },
                    537:        { "unwatchn", roff_line_ignore, NULL, NULL, 0, NULL },
                    538:        { "vpt", roff_line_ignore, NULL, NULL, 0, NULL },
                    539:        { "vs", roff_line_ignore, NULL, NULL, 0, NULL },
                    540:        { "warn", roff_line_ignore, NULL, NULL, 0, NULL },
                    541:        { "warnscale", roff_line_ignore, NULL, NULL, 0, NULL },
                    542:        { "watch", roff_line_ignore, NULL, NULL, 0, NULL },
                    543:        { "watchlength", roff_line_ignore, NULL, NULL, 0, NULL },
                    544:        { "watchn", roff_line_ignore, NULL, NULL, 0, NULL },
                    545:        { "wh", roff_unsupp, NULL, NULL, 0, NULL },
                    546:        { "while", roff_unsupp, NULL, NULL, 0, NULL },
                    547:        { "write", roff_insec, NULL, NULL, 0, NULL },
                    548:        { "writec", roff_insec, NULL, NULL, 0, NULL },
                    549:        { "writem", roff_insec, NULL, NULL, 0, NULL },
                    550:        { "xflag", roff_line_ignore, NULL, NULL, 0, NULL },
1.85      kristaps  551:        { ".", roff_cblock, NULL, NULL, 0, NULL },
1.106     kristaps  552:        { NULL, roff_userdef, NULL, NULL, 0, NULL },
1.67      kristaps  553: };
                    554:
1.200     schwarze  555: /* not currently implemented: Ds em Eq LP Me PP pp Or Rd Sf SH */
1.175     schwarze  556: const  char *const __mdoc_reserved[] = {
                    557:        "Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At",
                    558:        "Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq",
                    559:        "Brc", "Bro", "Brq", "Bsx", "Bt", "Bx",
                    560:        "Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq",
1.200     schwarze  561:        "Dt", "Dv", "Dx", "D1",
                    562:        "Ec", "Ed", "Ef", "Ek", "El", "Em",
                    563:        "En", "Eo", "Er", "Es", "Ev", "Ex",
1.175     schwarze  564:        "Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",
1.200     schwarze  565:        "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp",
                    566:        "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
1.175     schwarze  567:        "Oc", "Oo", "Op", "Os", "Ot", "Ox",
1.200     schwarze  568:        "Pa", "Pc", "Pf", "Po", "Pp", "Pq",
                    569:        "Qc", "Ql", "Qo", "Qq", "Re", "Rs", "Rv",
                    570:        "Sc", "Sh", "Sm", "So", "Sq",
1.175     schwarze  571:        "Ss", "St", "Sx", "Sy",
                    572:        "Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",
1.200     schwarze  573:        "%A", "%B", "%C", "%D", "%I", "%J", "%N", "%O",
1.175     schwarze  574:        "%P", "%Q", "%R", "%T", "%U", "%V",
                    575:        NULL
                    576: };
                    577:
1.200     schwarze  578: /* not currently implemented: BT DE DS ME MT PT SY TQ YS */
1.175     schwarze  579: const  char *const __man_reserved[] = {
1.200     schwarze  580:        "AT", "B", "BI", "BR", "DT",
                    581:        "EE", "EN", "EQ", "EX", "HP", "I", "IB", "IP", "IR",
                    582:        "LP", "OP", "P", "PD", "PP",
                    583:        "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS",
                    584:        "TE", "TH", "TP", "TS", "T&", "UC", "UE", "UR",
1.175     schwarze  585:        NULL
                    586: };
                    587:
1.141     kristaps  588: /* Array of injected predefined strings. */
                    589: #define        PREDEFS_MAX      38
                    590: static const struct predef predefs[PREDEFS_MAX] = {
                    591: #include "predefs.in"
                    592: };
                    593:
1.155     kristaps  594: /* See roffhash_find() */
1.85      kristaps  595: #define        ROFF_HASH(p)    (p[0] - ASCII_LO)
                    596:
1.178     schwarze  597: static int      roffit_lines;  /* number of lines to delay */
                    598: static char    *roffit_macro;  /* nil-terminated macro line */
                    599:
1.207     schwarze  600:
1.266     schwarze  601: /* --- request table ------------------------------------------------------ */
                    602:
1.85      kristaps  603: static void
1.155     kristaps  604: roffhash_init(void)
1.85      kristaps  605: {
                    606:        struct roffmac   *n;
                    607:        int               buc, i;
                    608:
1.106     kristaps  609:        for (i = 0; i < (int)ROFF_USERDEF; i++) {
1.85      kristaps  610:                assert(roffs[i].name[0] >= ASCII_LO);
                    611:                assert(roffs[i].name[0] <= ASCII_HI);
                    612:
                    613:                buc = ROFF_HASH(roffs[i].name);
                    614:
                    615:                if (NULL != (n = hash[buc])) {
                    616:                        for ( ; n->next; n = n->next)
                    617:                                /* Do nothing. */ ;
                    618:                        n->next = &roffs[i];
                    619:                } else
                    620:                        hash[buc] = &roffs[i];
                    621:        }
                    622: }
                    623:
1.67      kristaps  624: /*
1.294   ! schwarze  625:  * Look up a roff token by its name.  Returns TOKEN_NONE if no macro by
1.67      kristaps  626:  * the nil-terminated string name could be found.
                    627:  */
1.294   ! schwarze  628: static enum roff_tok
1.155     kristaps  629: roffhash_find(const char *p, size_t s)
1.67      kristaps  630: {
1.85      kristaps  631:        int              buc;
                    632:        struct roffmac  *n;
1.67      kristaps  633:
1.85      kristaps  634:        /*
                    635:         * libroff has an extremely simple hashtable, for the time
                    636:         * being, which simply keys on the first character, which must
                    637:         * be printable, then walks a chain.  It works well enough until
                    638:         * optimised.
                    639:         */
                    640:
                    641:        if (p[0] < ASCII_LO || p[0] > ASCII_HI)
1.294   ! schwarze  642:                return TOKEN_NONE;
1.85      kristaps  643:
                    644:        buc = ROFF_HASH(p);
                    645:
                    646:        if (NULL == (n = hash[buc]))
1.294   ! schwarze  647:                return TOKEN_NONE;
1.85      kristaps  648:        for ( ; n; n = n->next)
1.106     kristaps  649:                if (0 == strncmp(n->name, p, s) && '\0' == n->name[(int)s])
1.294   ! schwarze  650:                        return (enum roff_tok)(n - roffs);
1.67      kristaps  651:
1.294   ! schwarze  652:        return TOKEN_NONE;
1.67      kristaps  653: }
                    654:
1.266     schwarze  655: /* --- stack of request blocks -------------------------------------------- */
                    656:
1.67      kristaps  657: /*
                    658:  * Pop the current node off of the stack of roff instructions currently
                    659:  * pending.
                    660:  */
                    661: static void
                    662: roffnode_pop(struct roff *r)
                    663: {
                    664:        struct roffnode *p;
                    665:
1.75      kristaps  666:        assert(r->last);
1.207     schwarze  667:        p = r->last;
1.82      kristaps  668:
1.75      kristaps  669:        r->last = r->last->parent;
1.106     kristaps  670:        free(p->name);
                    671:        free(p->end);
1.67      kristaps  672:        free(p);
                    673: }
                    674:
                    675: /*
                    676:  * Push a roff node onto the instruction stack.  This must later be
                    677:  * removed with roffnode_pop().
                    678:  */
1.98      schwarze  679: static void
1.294   ! schwarze  680: roffnode_push(struct roff *r, enum roff_tok tok, const char *name,
1.106     kristaps  681:                int line, int col)
1.67      kristaps  682: {
                    683:        struct roffnode *p;
                    684:
1.98      schwarze  685:        p = mandoc_calloc(1, sizeof(struct roffnode));
1.67      kristaps  686:        p->tok = tok;
1.106     kristaps  687:        if (name)
                    688:                p->name = mandoc_strdup(name);
1.67      kristaps  689:        p->parent = r->last;
                    690:        p->line = line;
                    691:        p->col = col;
1.198     schwarze  692:        p->rule = p->parent ? p->parent->rule : 0;
1.67      kristaps  693:
                    694:        r->last = p;
                    695: }
                    696:
1.266     schwarze  697: /* --- roff parser state data management ---------------------------------- */
                    698:
1.67      kristaps  699: static void
                    700: roff_free1(struct roff *r)
                    701: {
1.176     schwarze  702:        struct tbl_node *tbl;
1.125     kristaps  703:        struct eqn_node *e;
1.167     kristaps  704:        int              i;
1.67      kristaps  705:
1.176     schwarze  706:        while (NULL != (tbl = r->first_tbl)) {
                    707:                r->first_tbl = tbl->next;
                    708:                tbl_free(tbl);
1.109     kristaps  709:        }
1.113     kristaps  710:        r->first_tbl = r->last_tbl = r->tbl = NULL;
                    711:
1.125     kristaps  712:        while (NULL != (e = r->first_eqn)) {
                    713:                r->first_eqn = e->next;
                    714:                eqn_free(e);
                    715:        }
                    716:        r->first_eqn = r->last_eqn = r->eqn = NULL;
                    717:
1.67      kristaps  718:        while (r->last)
                    719:                roffnode_pop(r);
1.109     kristaps  720:
1.223     schwarze  721:        free (r->rstack);
                    722:        r->rstack = NULL;
                    723:        r->rstacksz = 0;
                    724:        r->rstackpos = -1;
                    725:
                    726:        roff_freereg(r->regtab);
                    727:        r->regtab = NULL;
                    728:
1.167     kristaps  729:        roff_freestr(r->strtab);
                    730:        roff_freestr(r->xmbtab);
                    731:        r->strtab = r->xmbtab = NULL;
                    732:
                    733:        if (r->xtab)
                    734:                for (i = 0; i < 128; i++)
                    735:                        free(r->xtab[i].p);
                    736:        free(r->xtab);
                    737:        r->xtab = NULL;
1.67      kristaps  738: }
                    739:
                    740: void
                    741: roff_reset(struct roff *r)
                    742: {
                    743:
                    744:        roff_free1(r);
1.227     schwarze  745:        r->format = r->options & (MPARSE_MDOC | MPARSE_MAN);
1.174     kristaps  746:        r->control = 0;
1.67      kristaps  747: }
                    748:
                    749: void
                    750: roff_free(struct roff *r)
                    751: {
                    752:
                    753:        roff_free1(r);
                    754:        free(r);
                    755: }
                    756:
                    757: struct roff *
1.279     schwarze  758: roff_alloc(struct mparse *parse, int options)
1.67      kristaps  759: {
                    760:        struct roff     *r;
                    761:
1.98      schwarze  762:        r = mandoc_calloc(1, sizeof(struct roff));
1.128     kristaps  763:        r->parse = parse;
1.199     schwarze  764:        r->options = options;
1.227     schwarze  765:        r->format = options & (MPARSE_MDOC | MPARSE_MAN);
1.82      kristaps  766:        r->rstackpos = -1;
1.207     schwarze  767:
1.155     kristaps  768:        roffhash_init();
1.141     kristaps  769:
1.277     schwarze  770:        return r;
1.265     schwarze  771: }
                    772:
1.266     schwarze  773: /* --- syntax tree state data management ---------------------------------- */
                    774:
1.265     schwarze  775: static void
                    776: roff_man_free1(struct roff_man *man)
                    777: {
                    778:
1.266     schwarze  779:        if (man->first != NULL)
                    780:                roff_node_delete(man, man->first);
1.265     schwarze  781:        free(man->meta.msec);
                    782:        free(man->meta.vol);
                    783:        free(man->meta.os);
                    784:        free(man->meta.arch);
                    785:        free(man->meta.title);
                    786:        free(man->meta.name);
                    787:        free(man->meta.date);
                    788: }
                    789:
                    790: static void
                    791: roff_man_alloc1(struct roff_man *man)
                    792: {
                    793:
                    794:        memset(&man->meta, 0, sizeof(man->meta));
                    795:        man->first = mandoc_calloc(1, sizeof(*man->first));
                    796:        man->first->type = ROFFT_ROOT;
                    797:        man->last = man->first;
                    798:        man->last_es = NULL;
                    799:        man->flags = 0;
                    800:        man->macroset = MACROSET_NONE;
                    801:        man->lastsec = man->lastnamed = SEC_NONE;
                    802:        man->next = ROFF_NEXT_CHILD;
                    803: }
                    804:
                    805: void
                    806: roff_man_reset(struct roff_man *man)
                    807: {
                    808:
                    809:        roff_man_free1(man);
                    810:        roff_man_alloc1(man);
                    811: }
                    812:
                    813: void
                    814: roff_man_free(struct roff_man *man)
                    815: {
                    816:
                    817:        roff_man_free1(man);
                    818:        free(man);
                    819: }
                    820:
                    821: struct roff_man *
                    822: roff_man_alloc(struct roff *roff, struct mparse *parse,
                    823:        const char *defos, int quick)
                    824: {
                    825:        struct roff_man *man;
                    826:
                    827:        man = mandoc_calloc(1, sizeof(*man));
                    828:        man->parse = parse;
                    829:        man->roff = roff;
                    830:        man->defos = defos;
                    831:        man->quick = quick;
                    832:        roff_man_alloc1(man);
1.277     schwarze  833:        return man;
1.67      kristaps  834: }
                    835:
1.266     schwarze  836: /* --- syntax tree handling ----------------------------------------------- */
                    837:
                    838: struct roff_node *
                    839: roff_node_alloc(struct roff_man *man, int line, int pos,
                    840:        enum roff_type type, int tok)
                    841: {
                    842:        struct roff_node        *n;
                    843:
                    844:        n = mandoc_calloc(1, sizeof(*n));
                    845:        n->line = line;
                    846:        n->pos = pos;
                    847:        n->tok = tok;
                    848:        n->type = type;
                    849:        n->sec = man->lastsec;
                    850:
                    851:        if (man->flags & MDOC_SYNOPSIS)
1.285     schwarze  852:                n->flags |= NODE_SYNPRETTY;
1.266     schwarze  853:        else
1.285     schwarze  854:                n->flags &= ~NODE_SYNPRETTY;
1.266     schwarze  855:        if (man->flags & MDOC_NEWLINE)
1.285     schwarze  856:                n->flags |= NODE_LINE;
1.266     schwarze  857:        man->flags &= ~MDOC_NEWLINE;
                    858:
1.277     schwarze  859:        return n;
1.266     schwarze  860: }
                    861:
                    862: void
                    863: roff_node_append(struct roff_man *man, struct roff_node *n)
                    864: {
                    865:
                    866:        switch (man->next) {
                    867:        case ROFF_NEXT_SIBLING:
1.281     schwarze  868:                if (man->last->next != NULL) {
                    869:                        n->next = man->last->next;
                    870:                        man->last->next->prev = n;
                    871:                } else
                    872:                        man->last->parent->last = n;
1.266     schwarze  873:                man->last->next = n;
                    874:                n->prev = man->last;
                    875:                n->parent = man->last->parent;
                    876:                break;
                    877:        case ROFF_NEXT_CHILD:
1.287     schwarze  878:                if (man->last->child != NULL) {
                    879:                        n->next = man->last->child;
                    880:                        man->last->child->prev = n;
                    881:                } else
                    882:                        man->last->last = n;
1.266     schwarze  883:                man->last->child = n;
                    884:                n->parent = man->last;
                    885:                break;
                    886:        default:
                    887:                abort();
                    888:        }
1.282     schwarze  889:        man->last = n;
1.266     schwarze  890:
                    891:        switch (n->type) {
                    892:        case ROFFT_HEAD:
                    893:                n->parent->head = n;
                    894:                break;
                    895:        case ROFFT_BODY:
1.282     schwarze  896:                if (n->end != ENDBODY_NOT)
                    897:                        return;
1.266     schwarze  898:                n->parent->body = n;
                    899:                break;
                    900:        case ROFFT_TAIL:
                    901:                n->parent->tail = n;
                    902:                break;
                    903:        default:
1.282     schwarze  904:                return;
1.266     schwarze  905:        }
1.282     schwarze  906:
                    907:        /*
                    908:         * Copy over the normalised-data pointer of our parent.  Not
                    909:         * everybody has one, but copying a null pointer is fine.
                    910:         */
                    911:
                    912:        n->norm = n->parent->norm;
                    913:        assert(n->parent->type == ROFFT_BLOCK);
1.266     schwarze  914: }
                    915:
1.267     schwarze  916: void
                    917: roff_word_alloc(struct roff_man *man, int line, int pos, const char *word)
                    918: {
                    919:        struct roff_node        *n;
                    920:
                    921:        n = roff_node_alloc(man, line, pos, ROFFT_TEXT, TOKEN_NONE);
                    922:        n->string = roff_strdup(man->roff, word);
                    923:        roff_node_append(man, n);
1.286     schwarze  924:        n->flags |= NODE_VALID | NODE_ENDED;
1.267     schwarze  925:        man->next = ROFF_NEXT_SIBLING;
                    926: }
                    927:
                    928: void
                    929: roff_word_append(struct roff_man *man, const char *word)
                    930: {
                    931:        struct roff_node        *n;
                    932:        char                    *addstr, *newstr;
                    933:
                    934:        n = man->last;
                    935:        addstr = roff_strdup(man->roff, word);
                    936:        mandoc_asprintf(&newstr, "%s %s", n->string, addstr);
                    937:        free(addstr);
                    938:        free(n->string);
                    939:        n->string = newstr;
                    940:        man->next = ROFF_NEXT_SIBLING;
1.268     schwarze  941: }
                    942:
                    943: void
                    944: roff_elem_alloc(struct roff_man *man, int line, int pos, int tok)
                    945: {
                    946:        struct roff_node        *n;
                    947:
                    948:        n = roff_node_alloc(man, line, pos, ROFFT_ELEM, tok);
                    949:        roff_node_append(man, n);
                    950:        man->next = ROFF_NEXT_CHILD;
                    951: }
                    952:
                    953: struct roff_node *
                    954: roff_block_alloc(struct roff_man *man, int line, int pos, int tok)
                    955: {
                    956:        struct roff_node        *n;
                    957:
                    958:        n = roff_node_alloc(man, line, pos, ROFFT_BLOCK, tok);
                    959:        roff_node_append(man, n);
                    960:        man->next = ROFF_NEXT_CHILD;
1.277     schwarze  961:        return n;
1.267     schwarze  962: }
                    963:
1.266     schwarze  964: struct roff_node *
                    965: roff_head_alloc(struct roff_man *man, int line, int pos, int tok)
                    966: {
                    967:        struct roff_node        *n;
                    968:
                    969:        n = roff_node_alloc(man, line, pos, ROFFT_HEAD, tok);
                    970:        roff_node_append(man, n);
                    971:        man->next = ROFF_NEXT_CHILD;
1.277     schwarze  972:        return n;
1.266     schwarze  973: }
                    974:
                    975: struct roff_node *
                    976: roff_body_alloc(struct roff_man *man, int line, int pos, int tok)
                    977: {
                    978:        struct roff_node        *n;
                    979:
                    980:        n = roff_node_alloc(man, line, pos, ROFFT_BODY, tok);
                    981:        roff_node_append(man, n);
                    982:        man->next = ROFF_NEXT_CHILD;
1.277     schwarze  983:        return n;
1.267     schwarze  984: }
                    985:
                    986: void
                    987: roff_addeqn(struct roff_man *man, const struct eqn *eqn)
                    988: {
                    989:        struct roff_node        *n;
                    990:
                    991:        n = roff_node_alloc(man, eqn->ln, eqn->pos, ROFFT_EQN, TOKEN_NONE);
                    992:        n->eqn = eqn;
                    993:        if (eqn->ln > man->last->line)
1.285     schwarze  994:                n->flags |= NODE_LINE;
1.267     schwarze  995:        roff_node_append(man, n);
                    996:        man->next = ROFF_NEXT_SIBLING;
                    997: }
                    998:
                    999: void
                   1000: roff_addtbl(struct roff_man *man, const struct tbl_span *tbl)
                   1001: {
                   1002:        struct roff_node        *n;
                   1003:
                   1004:        if (man->macroset == MACROSET_MAN)
                   1005:                man_breakscope(man, TOKEN_NONE);
                   1006:        n = roff_node_alloc(man, tbl->line, 0, ROFFT_TBL, TOKEN_NONE);
                   1007:        n->span = tbl;
                   1008:        roff_node_append(man, n);
1.286     schwarze 1009:        n->flags |= NODE_VALID | NODE_ENDED;
1.267     schwarze 1010:        man->next = ROFF_NEXT_SIBLING;
1.266     schwarze 1011: }
                   1012:
                   1013: void
                   1014: roff_node_unlink(struct roff_man *man, struct roff_node *n)
                   1015: {
                   1016:
                   1017:        /* Adjust siblings. */
                   1018:
                   1019:        if (n->prev)
                   1020:                n->prev->next = n->next;
                   1021:        if (n->next)
                   1022:                n->next->prev = n->prev;
                   1023:
                   1024:        /* Adjust parent. */
                   1025:
                   1026:        if (n->parent != NULL) {
                   1027:                if (n->parent->child == n)
                   1028:                        n->parent->child = n->next;
                   1029:                if (n->parent->last == n)
                   1030:                        n->parent->last = n->prev;
                   1031:        }
                   1032:
                   1033:        /* Adjust parse point. */
                   1034:
                   1035:        if (man == NULL)
                   1036:                return;
                   1037:        if (man->last == n) {
                   1038:                if (n->prev == NULL) {
                   1039:                        man->last = n->parent;
                   1040:                        man->next = ROFF_NEXT_CHILD;
                   1041:                } else {
                   1042:                        man->last = n->prev;
                   1043:                        man->next = ROFF_NEXT_SIBLING;
                   1044:                }
                   1045:        }
                   1046:        if (man->first == n)
                   1047:                man->first = NULL;
                   1048: }
                   1049:
                   1050: void
                   1051: roff_node_free(struct roff_node *n)
                   1052: {
                   1053:
                   1054:        if (n->args != NULL)
                   1055:                mdoc_argv_free(n->args);
                   1056:        if (n->type == ROFFT_BLOCK || n->type == ROFFT_ELEM)
                   1057:                free(n->norm);
                   1058:        free(n->string);
                   1059:        free(n);
                   1060: }
                   1061:
                   1062: void
                   1063: roff_node_delete(struct roff_man *man, struct roff_node *n)
                   1064: {
                   1065:
                   1066:        while (n->child != NULL)
                   1067:                roff_node_delete(man, n->child);
                   1068:        roff_node_unlink(man, n);
                   1069:        roff_node_free(n);
1.269     schwarze 1070: }
                   1071:
                   1072: void
                   1073: deroff(char **dest, const struct roff_node *n)
                   1074: {
                   1075:        char    *cp;
                   1076:        size_t   sz;
                   1077:
                   1078:        if (n->type != ROFFT_TEXT) {
                   1079:                for (n = n->child; n != NULL; n = n->next)
                   1080:                        deroff(dest, n);
                   1081:                return;
                   1082:        }
                   1083:
1.288     schwarze 1084:        /* Skip leading whitespace. */
1.269     schwarze 1085:
1.288     schwarze 1086:        for (cp = n->string; *cp != '\0'; cp++) {
1.289     schwarze 1087:                if (cp[0] == '\\' && cp[1] != '\0' &&
                   1088:                    strchr(" %&0^|~", cp[1]) != NULL)
1.269     schwarze 1089:                        cp++;
1.288     schwarze 1090:                else if ( ! isspace((unsigned char)*cp))
1.269     schwarze 1091:                        break;
                   1092:        }
                   1093:
1.289     schwarze 1094:        /* Skip trailing backslash. */
                   1095:
                   1096:        sz = strlen(cp);
1.290     schwarze 1097:        if (sz > 0 && cp[sz - 1] == '\\')
1.289     schwarze 1098:                sz--;
                   1099:
1.269     schwarze 1100:        /* Skip trailing whitespace. */
                   1101:
1.289     schwarze 1102:        for (; sz; sz--)
1.269     schwarze 1103:                if ( ! isspace((unsigned char)cp[sz-1]))
                   1104:                        break;
                   1105:
                   1106:        /* Skip empty strings. */
                   1107:
                   1108:        if (sz == 0)
                   1109:                return;
                   1110:
                   1111:        if (*dest == NULL) {
                   1112:                *dest = mandoc_strndup(cp, sz);
                   1113:                return;
                   1114:        }
                   1115:
                   1116:        mandoc_asprintf(&cp, "%s %*s", *dest, (int)sz, cp);
                   1117:        free(*dest);
                   1118:        *dest = cp;
1.266     schwarze 1119: }
                   1120:
                   1121: /* --- main functions of the roff parser ---------------------------------- */
                   1122:
1.94      kristaps 1123: /*
1.206     schwarze 1124:  * In the current line, expand escape sequences that tend to get
                   1125:  * used in numerical expressions and conditional requests.
                   1126:  * Also check the syntax of the remaining escape sequences.
1.154     kristaps 1127:  */
1.172     schwarze 1128: static enum rofferr
1.238     schwarze 1129: roff_res(struct roff *r, struct buf *buf, int ln, int pos)
1.94      kristaps 1130: {
1.208     schwarze 1131:        char             ubuf[24]; /* buffer to print the number */
1.205     schwarze 1132:        const char      *start; /* start of the string to process */
1.209     schwarze 1133:        char            *stesc; /* start of an escape sequence ('\\') */
1.108     schwarze 1134:        const char      *stnam; /* start of the name, after "[(*" */
                   1135:        const char      *cp;    /* end of the name, e.g. before ']' */
                   1136:        const char      *res;   /* the string to be substituted */
1.238     schwarze 1137:        char            *nbuf;  /* new buffer to copy buf->buf to */
1.181     schwarze 1138:        size_t           maxl;  /* expected length of the escape name */
                   1139:        size_t           naml;  /* actual length of the escape name */
1.237     schwarze 1140:        enum mandoc_esc  esc;   /* type of the escape sequence */
                   1141:        int              inaml; /* length returned from mandoc_escape() */
1.181     schwarze 1142:        int              expand_count;  /* to avoid infinite loops */
1.206     schwarze 1143:        int              npos;  /* position in numeric expression */
1.218     schwarze 1144:        int              arg_complete; /* argument not interrupted by eol */
1.206     schwarze 1145:        char             term;  /* character terminating the escape */
1.94      kristaps 1146:
1.170     schwarze 1147:        expand_count = 0;
1.238     schwarze 1148:        start = buf->buf + pos;
1.205     schwarze 1149:        stesc = strchr(start, '\0') - 1;
                   1150:        while (stesc-- > start) {
1.170     schwarze 1151:
1.205     schwarze 1152:                /* Search backwards for the next backslash. */
                   1153:
1.238     schwarze 1154:                if (*stesc != '\\')
1.205     schwarze 1155:                        continue;
                   1156:
                   1157:                /* If it is escaped, skip it. */
                   1158:
                   1159:                for (cp = stesc - 1; cp >= start; cp--)
1.238     schwarze 1160:                        if (*cp != '\\')
1.205     schwarze 1161:                                break;
                   1162:
1.238     schwarze 1163:                if ((stesc - cp) % 2 == 0) {
1.209     schwarze 1164:                        stesc = (char *)cp;
1.205     schwarze 1165:                        continue;
                   1166:                }
1.108     schwarze 1167:
1.206     schwarze 1168:                /* Decide whether to expand or to check only. */
1.108     schwarze 1169:
1.206     schwarze 1170:                term = '\0';
1.205     schwarze 1171:                cp = stesc + 1;
1.181     schwarze 1172:                switch (*cp) {
1.207     schwarze 1173:                case '*':
1.181     schwarze 1174:                        res = NULL;
                   1175:                        break;
1.207     schwarze 1176:                case 'B':
                   1177:                case 'w':
1.206     schwarze 1178:                        term = cp[1];
                   1179:                        /* FALLTHROUGH */
1.207     schwarze 1180:                case 'n':
1.181     schwarze 1181:                        res = ubuf;
                   1182:                        break;
                   1183:                default:
1.237     schwarze 1184:                        esc = mandoc_escape(&cp, &stnam, &inaml);
                   1185:                        if (esc == ESCAPE_ERROR ||
                   1186:                            (esc == ESCAPE_SPECIAL &&
1.279     schwarze 1187:                             mchars_spec2cp(stnam, inaml) < 0))
1.219     schwarze 1188:                                mandoc_vmsg(MANDOCERR_ESC_BAD,
1.238     schwarze 1189:                                    r->parse, ln, (int)(stesc - buf->buf),
1.219     schwarze 1190:                                    "%.*s", (int)(cp - stesc), stesc);
1.205     schwarze 1191:                        continue;
1.152     kristaps 1192:                }
                   1193:
1.205     schwarze 1194:                if (EXPAND_LIMIT < ++expand_count) {
                   1195:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
1.238     schwarze 1196:                            ln, (int)(stesc - buf->buf), NULL);
1.277     schwarze 1197:                        return ROFF_IGN;
1.205     schwarze 1198:                }
1.108     schwarze 1199:
                   1200:                /*
                   1201:                 * The third character decides the length
1.181     schwarze 1202:                 * of the name of the string or register.
1.108     schwarze 1203:                 * Save a pointer to the name.
                   1204:                 */
                   1205:
1.238     schwarze 1206:                if (term == '\0') {
1.206     schwarze 1207:                        switch (*++cp) {
1.207     schwarze 1208:                        case '\0':
1.206     schwarze 1209:                                maxl = 0;
                   1210:                                break;
1.207     schwarze 1211:                        case '(':
1.206     schwarze 1212:                                cp++;
                   1213:                                maxl = 2;
                   1214:                                break;
1.207     schwarze 1215:                        case '[':
1.206     schwarze 1216:                                cp++;
                   1217:                                term = ']';
                   1218:                                maxl = 0;
                   1219:                                break;
                   1220:                        default:
                   1221:                                maxl = 1;
                   1222:                                break;
                   1223:                        }
                   1224:                } else {
                   1225:                        cp += 2;
1.94      kristaps 1226:                        maxl = 0;
                   1227:                }
1.108     schwarze 1228:                stnam = cp;
1.94      kristaps 1229:
1.108     schwarze 1230:                /* Advance to the end of the name. */
1.94      kristaps 1231:
1.253     schwarze 1232:                naml = 0;
1.218     schwarze 1233:                arg_complete = 1;
1.253     schwarze 1234:                while (maxl == 0 || naml < maxl) {
1.238     schwarze 1235:                        if (*cp == '\0') {
1.219     schwarze 1236:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 1237:                                    ln, (int)(stesc - buf->buf), stesc);
1.218     schwarze 1238:                                arg_complete = 0;
1.206     schwarze 1239:                                break;
1.153     kristaps 1240:                        }
1.238     schwarze 1241:                        if (maxl == 0 && *cp == term) {
1.206     schwarze 1242:                                cp++;
1.253     schwarze 1243:                                break;
                   1244:                        }
                   1245:                        if (*cp++ != '\\' || stesc[1] != 'w') {
                   1246:                                naml++;
                   1247:                                continue;
                   1248:                        }
                   1249:                        switch (mandoc_escape(&cp, NULL, NULL)) {
                   1250:                        case ESCAPE_SPECIAL:
                   1251:                        case ESCAPE_UNICODE:
                   1252:                        case ESCAPE_NUMBERED:
                   1253:                        case ESCAPE_OVERSTRIKE:
                   1254:                                naml++;
                   1255:                                break;
                   1256:                        default:
1.94      kristaps 1257:                                break;
1.206     schwarze 1258:                        }
1.94      kristaps 1259:                }
                   1260:
1.108     schwarze 1261:                /*
                   1262:                 * Retrieve the replacement string; if it is
                   1263:                 * undefined, resume searching for escapes.
                   1264:                 */
                   1265:
1.206     schwarze 1266:                switch (stesc[1]) {
1.207     schwarze 1267:                case '*':
1.218     schwarze 1268:                        if (arg_complete)
                   1269:                                res = roff_getstrn(r, stnam, naml);
1.206     schwarze 1270:                        break;
1.207     schwarze 1271:                case 'B':
1.206     schwarze 1272:                        npos = 0;
1.218     schwarze 1273:                        ubuf[0] = arg_complete &&
1.261     schwarze 1274:                            roff_evalnum(r, ln, stnam, &npos,
                   1275:                              NULL, ROFFNUM_SCALE) &&
1.218     schwarze 1276:                            stnam + npos + 1 == cp ? '1' : '0';
1.206     schwarze 1277:                        ubuf[1] = '\0';
                   1278:                        break;
1.207     schwarze 1279:                case 'n':
1.218     schwarze 1280:                        if (arg_complete)
                   1281:                                (void)snprintf(ubuf, sizeof(ubuf), "%d",
                   1282:                                    roff_getregn(r, stnam, naml));
                   1283:                        else
                   1284:                                ubuf[0] = '\0';
1.206     schwarze 1285:                        break;
1.207     schwarze 1286:                case 'w':
1.218     schwarze 1287:                        /* use even incomplete args */
1.208     schwarze 1288:                        (void)snprintf(ubuf, sizeof(ubuf), "%d",
1.206     schwarze 1289:                            24 * (int)naml);
                   1290:                        break;
                   1291:                }
1.94      kristaps 1292:
1.238     schwarze 1293:                if (res == NULL) {
1.219     schwarze 1294:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1295:                            r->parse, ln, (int)(stesc - buf->buf),
1.219     schwarze 1296:                            "%.*s", (int)naml, stnam);
1.142     kristaps 1297:                        res = "";
1.246     schwarze 1298:                } else if (buf->sz + strlen(res) > SHRT_MAX) {
                   1299:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
                   1300:                            ln, (int)(stesc - buf->buf), NULL);
1.277     schwarze 1301:                        return ROFF_IGN;
1.94      kristaps 1302:                }
                   1303:
1.108     schwarze 1304:                /* Replace the escape sequence by the string. */
                   1305:
1.209     schwarze 1306:                *stesc = '\0';
1.238     schwarze 1307:                buf->sz = mandoc_asprintf(&nbuf, "%s%s%s",
                   1308:                    buf->buf, res, cp) + 1;
1.94      kristaps 1309:
1.205     schwarze 1310:                /* Prepare for the next replacement. */
1.94      kristaps 1311:
1.205     schwarze 1312:                start = nbuf + pos;
1.238     schwarze 1313:                stesc = nbuf + (stesc - buf->buf) + strlen(res);
                   1314:                free(buf->buf);
                   1315:                buf->buf = nbuf;
1.154     kristaps 1316:        }
1.277     schwarze 1317:        return ROFF_CONT;
1.154     kristaps 1318: }
                   1319:
                   1320: /*
1.275     schwarze 1321:  * Process text streams.
1.154     kristaps 1322:  */
                   1323: static enum rofferr
1.238     schwarze 1324: roff_parsetext(struct buf *buf, int pos, int *offs)
1.154     kristaps 1325: {
                   1326:        size_t           sz;
                   1327:        const char      *start;
1.178     schwarze 1328:        char            *p;
                   1329:        int              isz;
1.154     kristaps 1330:        enum mandoc_esc  esc;
                   1331:
1.275     schwarze 1332:        /* Spring the input line trap. */
                   1333:
                   1334:        if (roffit_lines == 1) {
                   1335:                isz = mandoc_asprintf(&p, "%s\n.%s", buf->buf, roffit_macro);
                   1336:                free(buf->buf);
                   1337:                buf->buf = p;
                   1338:                buf->sz = isz + 1;
                   1339:                *offs = 0;
                   1340:                free(roffit_macro);
                   1341:                roffit_lines = 0;
1.277     schwarze 1342:                return ROFF_REPARSE;
1.275     schwarze 1343:        } else if (roffit_lines > 1)
                   1344:                --roffit_lines;
                   1345:
                   1346:        /* Convert all breakable hyphens into ASCII_HYPH. */
                   1347:
1.238     schwarze 1348:        start = p = buf->buf + pos;
1.154     kristaps 1349:
1.238     schwarze 1350:        while (*p != '\0') {
1.154     kristaps 1351:                sz = strcspn(p, "-\\");
                   1352:                p += sz;
                   1353:
1.238     schwarze 1354:                if (*p == '\0')
1.159     kristaps 1355:                        break;
                   1356:
1.238     schwarze 1357:                if (*p == '\\') {
1.154     kristaps 1358:                        /* Skip over escapes. */
                   1359:                        p++;
1.189     schwarze 1360:                        esc = mandoc_escape((const char **)&p, NULL, NULL);
1.238     schwarze 1361:                        if (esc == ESCAPE_ERROR)
1.154     kristaps 1362:                                break;
1.264     schwarze 1363:                        while (*p == '-')
                   1364:                                p++;
1.155     kristaps 1365:                        continue;
1.159     kristaps 1366:                } else if (p == start) {
1.158     kristaps 1367:                        p++;
1.155     kristaps 1368:                        continue;
1.158     kristaps 1369:                }
1.155     kristaps 1370:
1.171     schwarze 1371:                if (isalpha((unsigned char)p[-1]) &&
                   1372:                    isalpha((unsigned char)p[1]))
1.155     kristaps 1373:                        *p = ASCII_HYPH;
                   1374:                p++;
1.94      kristaps 1375:        }
1.277     schwarze 1376:        return ROFF_CONT;
1.94      kristaps 1377: }
                   1378:
1.67      kristaps 1379: enum rofferr
1.238     schwarze 1380: roff_parseln(struct roff *r, int ln, struct buf *buf, int *offs)
1.67      kristaps 1381: {
1.294   ! schwarze 1382:        enum roff_tok    t;
1.109     kristaps 1383:        enum rofferr     e;
1.238     schwarze 1384:        int              pos;   /* parse point */
1.243     schwarze 1385:        int              spos;  /* saved parse point for messages */
1.238     schwarze 1386:        int              ppos;  /* original offset in buf->buf */
                   1387:        int              ctl;   /* macro line (boolean) */
                   1388:
                   1389:        ppos = pos = *offs;
1.79      kristaps 1390:
1.230     schwarze 1391:        /* Handle in-line equation delimiters. */
                   1392:
1.236     schwarze 1393:        if (r->tbl == NULL &&
                   1394:            r->last_eqn != NULL && r->last_eqn->delim &&
1.230     schwarze 1395:            (r->eqn == NULL || r->eqn_inline)) {
1.238     schwarze 1396:                e = roff_eqndelim(r, buf, pos);
1.230     schwarze 1397:                if (e == ROFF_REPARSE)
1.277     schwarze 1398:                        return e;
1.230     schwarze 1399:                assert(e == ROFF_CONT);
                   1400:        }
                   1401:
                   1402:        /* Expand some escape sequences. */
1.94      kristaps 1403:
1.238     schwarze 1404:        e = roff_res(r, buf, ln, pos);
                   1405:        if (e == ROFF_IGN)
1.277     schwarze 1406:                return e;
1.238     schwarze 1407:        assert(e == ROFF_CONT);
1.94      kristaps 1408:
1.238     schwarze 1409:        ctl = roff_getcontrol(r, buf->buf, &pos);
1.130     kristaps 1410:
1.94      kristaps 1411:        /*
1.79      kristaps 1412:         * First, if a scope is open and we're not a macro, pass the
1.252     schwarze 1413:         * text through the macro's filter.
                   1414:         * Equations process all content themselves.
                   1415:         * Tables process almost all content themselves, but we want
                   1416:         * to warn about macros before passing it there.
1.79      kristaps 1417:         */
1.74      kristaps 1418:
1.252     schwarze 1419:        if (r->last != NULL && ! ctl) {
1.78      kristaps 1420:                t = r->last->tok;
1.238     schwarze 1421:                e = (*roffs[t].text)(r, t, buf, ln, pos, pos, offs);
1.294   ! schwarze 1422:                if (e == ROFF_IGN)
1.277     schwarze 1423:                        return e;
1.294   ! schwarze 1424:                assert(e == ROFF_CONT);
1.182     schwarze 1425:        }
1.252     schwarze 1426:        if (r->eqn != NULL)
1.277     schwarze 1427:                return eqn_read(&r->eqn, ln, buf->buf, ppos, offs);
1.252     schwarze 1428:        if (r->tbl != NULL && ( ! ctl || buf->buf[pos] == '\0'))
1.277     schwarze 1429:                return tbl_read(r->tbl, ln, buf->buf, ppos);
1.252     schwarze 1430:        if ( ! ctl)
1.277     schwarze 1431:                return roff_parsetext(buf, pos, offs);
1.228     schwarze 1432:
                   1433:        /* Skip empty request lines. */
                   1434:
1.238     schwarze 1435:        if (buf->buf[pos] == '"') {
1.228     schwarze 1436:                mandoc_msg(MANDOCERR_COMMENT_BAD, r->parse,
                   1437:                    ln, pos, NULL);
1.277     schwarze 1438:                return ROFF_IGN;
1.238     schwarze 1439:        } else if (buf->buf[pos] == '\0')
1.277     schwarze 1440:                return ROFF_IGN;
1.67      kristaps 1441:
1.79      kristaps 1442:        /*
                   1443:         * If a scope is open, go to the child handler for that macro,
                   1444:         * as it may want to preprocess before doing anything with it.
1.125     kristaps 1445:         * Don't do so if an equation is open.
1.79      kristaps 1446:         */
1.78      kristaps 1447:
1.79      kristaps 1448:        if (r->last) {
                   1449:                t = r->last->tok;
1.277     schwarze 1450:                return (*roffs[t].sub)(r, t, buf, ln, ppos, pos, offs);
1.79      kristaps 1451:        }
1.78      kristaps 1452:
1.243     schwarze 1453:        /* No scope is open.  This is a new request or macro. */
                   1454:
                   1455:        spos = pos;
                   1456:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
                   1457:
                   1458:        /* Tables ignore most macros. */
                   1459:
1.294   ! schwarze 1460:        if (r->tbl != NULL && (t == TOKEN_NONE || t == ROFF_TS)) {
1.243     schwarze 1461:                mandoc_msg(MANDOCERR_TBLMACRO, r->parse,
                   1462:                    ln, pos, buf->buf + spos);
1.257     schwarze 1463:                if (t == ROFF_TS)
1.277     schwarze 1464:                        return ROFF_IGN;
1.257     schwarze 1465:                while (buf->buf[pos] != '\0' && buf->buf[pos] != ' ')
                   1466:                        pos++;
1.291     schwarze 1467:                while (buf->buf[pos] == ' ')
1.257     schwarze 1468:                        pos++;
1.277     schwarze 1469:                return tbl_read(r->tbl, ln, buf->buf, pos);
1.243     schwarze 1470:        }
                   1471:
1.79      kristaps 1472:        /*
1.243     schwarze 1473:         * This is neither a roff request nor a user-defined macro.
                   1474:         * Let the standard macro set parsers handle it.
1.79      kristaps 1475:         */
1.67      kristaps 1476:
1.294   ! schwarze 1477:        if (t == TOKEN_NONE)
1.277     schwarze 1478:                return ROFF_CONT;
1.243     schwarze 1479:
                   1480:        /* Execute a roff request or a user defined macro. */
1.67      kristaps 1481:
1.277     schwarze 1482:        return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
1.74      kristaps 1483: }
                   1484:
1.117     kristaps 1485: void
1.74      kristaps 1486: roff_endparse(struct roff *r)
                   1487: {
                   1488:
1.110     kristaps 1489:        if (r->last)
1.221     schwarze 1490:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1491:                    r->last->line, r->last->col,
                   1492:                    roffs[r->last->tok].name);
1.117     kristaps 1493:
1.125     kristaps 1494:        if (r->eqn) {
1.221     schwarze 1495:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1496:                    r->eqn->eqn.ln, r->eqn->eqn.pos, "EQ");
1.151     kristaps 1497:                eqn_end(&r->eqn);
1.125     kristaps 1498:        }
                   1499:
1.117     kristaps 1500:        if (r->tbl) {
1.221     schwarze 1501:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1502:                    r->tbl->line, r->tbl->pos, "TS");
1.151     kristaps 1503:                tbl_end(&r->tbl);
1.117     kristaps 1504:        }
1.67      kristaps 1505: }
                   1506:
                   1507: /*
                   1508:  * Parse a roff node's type from the input buffer.  This must be in the
                   1509:  * form of ".foo xxx" in the usual way.
                   1510:  */
1.294   ! schwarze 1511: static enum roff_tok
1.214     schwarze 1512: roff_parse(struct roff *r, char *buf, int *pos, int ln, int ppos)
1.67      kristaps 1513: {
1.214     schwarze 1514:        char            *cp;
1.106     kristaps 1515:        const char      *mac;
                   1516:        size_t           maclen;
1.294   ! schwarze 1517:        enum roff_tok    t;
1.67      kristaps 1518:
1.214     schwarze 1519:        cp = buf + *pos;
                   1520:
                   1521:        if ('\0' == *cp || '"' == *cp || '\t' == *cp || ' ' == *cp)
1.294   ! schwarze 1522:                return TOKEN_NONE;
1.67      kristaps 1523:
1.214     schwarze 1524:        mac = cp;
                   1525:        maclen = roff_getname(r, &cp, ln, ppos);
1.67      kristaps 1526:
1.106     kristaps 1527:        t = (r->current_string = roff_getstrn(r, mac, maclen))
1.155     kristaps 1528:            ? ROFF_USERDEF : roffhash_find(mac, maclen);
1.67      kristaps 1529:
1.294   ! schwarze 1530:        if (t != TOKEN_NONE)
1.214     schwarze 1531:                *pos = cp - buf;
1.67      kristaps 1532:
1.277     schwarze 1533:        return t;
1.67      kristaps 1534: }
                   1535:
1.266     schwarze 1536: /* --- handling of request blocks ----------------------------------------- */
                   1537:
1.67      kristaps 1538: static enum rofferr
1.76      kristaps 1539: roff_cblock(ROFF_ARGS)
1.67      kristaps 1540: {
                   1541:
1.79      kristaps 1542:        /*
                   1543:         * A block-close `..' should only be invoked as a child of an
                   1544:         * ignore macro, otherwise raise a warning and just ignore it.
                   1545:         */
                   1546:
1.238     schwarze 1547:        if (r->last == NULL) {
1.221     schwarze 1548:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1549:                    ln, ppos, "..");
1.277     schwarze 1550:                return ROFF_IGN;
1.76      kristaps 1551:        }
1.67      kristaps 1552:
1.81      kristaps 1553:        switch (r->last->tok) {
1.207     schwarze 1554:        case ROFF_am:
1.220     schwarze 1555:                /* ROFF_am1 is remapped to ROFF_am in roff_block(). */
1.207     schwarze 1556:        case ROFF_ami:
                   1557:        case ROFF_de:
1.108     schwarze 1558:                /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
1.207     schwarze 1559:        case ROFF_dei:
                   1560:        case ROFF_ig:
1.81      kristaps 1561:                break;
                   1562:        default:
1.221     schwarze 1563:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1564:                    ln, ppos, "..");
1.277     schwarze 1565:                return ROFF_IGN;
1.76      kristaps 1566:        }
1.67      kristaps 1567:
1.238     schwarze 1568:        if (buf->buf[pos] != '\0')
1.217     schwarze 1569:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238     schwarze 1570:                    ".. %s", buf->buf + pos);
1.71      kristaps 1571:
                   1572:        roffnode_pop(r);
1.76      kristaps 1573:        roffnode_cleanscope(r);
1.277     schwarze 1574:        return ROFF_IGN;
1.71      kristaps 1575:
1.67      kristaps 1576: }
                   1577:
1.76      kristaps 1578: static void
                   1579: roffnode_cleanscope(struct roff *r)
1.67      kristaps 1580: {
                   1581:
1.76      kristaps 1582:        while (r->last) {
1.173     schwarze 1583:                if (--r->last->endspan != 0)
1.76      kristaps 1584:                        break;
                   1585:                roffnode_pop(r);
                   1586:        }
1.67      kristaps 1587: }
                   1588:
1.195     schwarze 1589: static void
                   1590: roff_ccond(struct roff *r, int ln, int ppos)
1.74      kristaps 1591: {
                   1592:
1.76      kristaps 1593:        if (NULL == r->last) {
1.221     schwarze 1594:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1595:                    ln, ppos, "\\}");
1.195     schwarze 1596:                return;
1.76      kristaps 1597:        }
                   1598:
1.82      kristaps 1599:        switch (r->last->tok) {
1.207     schwarze 1600:        case ROFF_el:
                   1601:        case ROFF_ie:
                   1602:        case ROFF_if:
1.82      kristaps 1603:                break;
                   1604:        default:
1.221     schwarze 1605:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1606:                    ln, ppos, "\\}");
1.195     schwarze 1607:                return;
1.75      kristaps 1608:        }
                   1609:
1.76      kristaps 1610:        if (r->last->endspan > -1) {
1.221     schwarze 1611:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1612:                    ln, ppos, "\\}");
1.195     schwarze 1613:                return;
1.76      kristaps 1614:        }
                   1615:
1.75      kristaps 1616:        roffnode_pop(r);
1.76      kristaps 1617:        roffnode_cleanscope(r);
1.195     schwarze 1618:        return;
1.76      kristaps 1619: }
                   1620:
                   1621: static enum rofferr
1.80      kristaps 1622: roff_block(ROFF_ARGS)
1.76      kristaps 1623: {
1.220     schwarze 1624:        const char      *name;
                   1625:        char            *iname, *cp;
1.213     schwarze 1626:        size_t           namesz;
1.106     kristaps 1627:
1.220     schwarze 1628:        /* Ignore groff compatibility mode for now. */
1.76      kristaps 1629:
1.238     schwarze 1630:        if (tok == ROFF_de1)
1.220     schwarze 1631:                tok = ROFF_de;
1.251     schwarze 1632:        else if (tok == ROFF_dei1)
                   1633:                tok = ROFF_dei;
1.238     schwarze 1634:        else if (tok == ROFF_am1)
1.220     schwarze 1635:                tok = ROFF_am;
1.251     schwarze 1636:        else if (tok == ROFF_ami1)
                   1637:                tok = ROFF_ami;
1.220     schwarze 1638:
                   1639:        /* Parse the macro name argument. */
                   1640:
1.238     schwarze 1641:        cp = buf->buf + pos;
                   1642:        if (tok == ROFF_ig) {
1.220     schwarze 1643:                iname = NULL;
                   1644:                namesz = 0;
                   1645:        } else {
                   1646:                iname = cp;
                   1647:                namesz = roff_getname(r, &cp, ln, ppos);
                   1648:                iname[namesz] = '\0';
                   1649:        }
1.107     kristaps 1650:
1.220     schwarze 1651:        /* Resolve the macro name argument if it is indirect. */
1.107     kristaps 1652:
1.238     schwarze 1653:        if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
                   1654:                if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.220     schwarze 1655:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1656:                            r->parse, ln, (int)(iname - buf->buf),
1.220     schwarze 1657:                            "%.*s", (int)namesz, iname);
                   1658:                        namesz = 0;
                   1659:                } else
                   1660:                        namesz = strlen(name);
                   1661:        } else
                   1662:                name = iname;
1.107     kristaps 1663:
1.238     schwarze 1664:        if (namesz == 0 && tok != ROFF_ig) {
1.220     schwarze 1665:                mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse,
                   1666:                    ln, ppos, roffs[tok].name);
1.277     schwarze 1667:                return ROFF_IGN;
1.220     schwarze 1668:        }
1.80      kristaps 1669:
1.106     kristaps 1670:        roffnode_push(r, tok, name, ln, ppos);
                   1671:
                   1672:        /*
                   1673:         * At the beginning of a `de' macro, clear the existing string
                   1674:         * with the same name, if there is one.  New content will be
1.193     schwarze 1675:         * appended from roff_block_text() in multiline mode.
1.106     kristaps 1676:         */
1.107     kristaps 1677:
1.238     schwarze 1678:        if (tok == ROFF_de || tok == ROFF_dei)
1.213     schwarze 1679:                roff_setstrn(&r->strtab, name, namesz, "", 0, 0);
1.76      kristaps 1680:
1.238     schwarze 1681:        if (*cp == '\0')
1.277     schwarze 1682:                return ROFF_IGN;
1.78      kristaps 1683:
1.220     schwarze 1684:        /* Get the custom end marker. */
1.107     kristaps 1685:
1.220     schwarze 1686:        iname = cp;
1.213     schwarze 1687:        namesz = roff_getname(r, &cp, ln, ppos);
1.220     schwarze 1688:
                   1689:        /* Resolve the end marker if it is indirect. */
                   1690:
1.238     schwarze 1691:        if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
                   1692:                if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.220     schwarze 1693:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1694:                            r->parse, ln, (int)(iname - buf->buf),
1.220     schwarze 1695:                            "%.*s", (int)namesz, iname);
                   1696:                        namesz = 0;
                   1697:                } else
                   1698:                        namesz = strlen(name);
                   1699:        } else
                   1700:                name = iname;
                   1701:
1.213     schwarze 1702:        if (namesz)
                   1703:                r->last->end = mandoc_strndup(name, namesz);
1.78      kristaps 1704:
1.238     schwarze 1705:        if (*cp != '\0')
1.217     schwarze 1706:                mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
                   1707:                    ln, pos, ".%s ... %s", roffs[tok].name, cp);
1.74      kristaps 1708:
1.277     schwarze 1709:        return ROFF_IGN;
1.78      kristaps 1710: }
                   1711:
                   1712: static enum rofferr
1.80      kristaps 1713: roff_block_sub(ROFF_ARGS)
1.79      kristaps 1714: {
1.294   ! schwarze 1715:        enum roff_tok   t;
1.79      kristaps 1716:        int             i, j;
                   1717:
                   1718:        /*
                   1719:         * First check whether a custom macro exists at this level.  If
                   1720:         * it does, then check against it.  This is some of groff's
                   1721:         * stranger behaviours.  If we encountered a custom end-scope
                   1722:         * tag and that tag also happens to be a "real" macro, then we
                   1723:         * need to try interpreting it again as a real macro.  If it's
                   1724:         * not, then return ignore.  Else continue.
                   1725:         */
                   1726:
                   1727:        if (r->last->end) {
1.130     kristaps 1728:                for (i = pos, j = 0; r->last->end[j]; j++, i++)
1.238     schwarze 1729:                        if (buf->buf[i] != r->last->end[j])
1.79      kristaps 1730:                                break;
                   1731:
1.238     schwarze 1732:                if (r->last->end[j] == '\0' &&
                   1733:                    (buf->buf[i] == '\0' ||
                   1734:                     buf->buf[i] == ' ' ||
                   1735:                     buf->buf[i] == '\t')) {
1.79      kristaps 1736:                        roffnode_pop(r);
                   1737:                        roffnode_cleanscope(r);
                   1738:
1.238     schwarze 1739:                        while (buf->buf[i] == ' ' || buf->buf[i] == '\t')
1.130     kristaps 1740:                                i++;
                   1741:
                   1742:                        pos = i;
1.238     schwarze 1743:                        if (roff_parse(r, buf->buf, &pos, ln, ppos) !=
1.294   ! schwarze 1744:                            TOKEN_NONE)
1.277     schwarze 1745:                                return ROFF_RERUN;
                   1746:                        return ROFF_IGN;
1.79      kristaps 1747:                }
                   1748:        }
                   1749:
                   1750:        /*
                   1751:         * If we have no custom end-query or lookup failed, then try
                   1752:         * pulling it out of the hashtable.
                   1753:         */
                   1754:
1.238     schwarze 1755:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.79      kristaps 1756:
1.238     schwarze 1757:        if (t != ROFF_cblock) {
                   1758:                if (tok != ROFF_ig)
                   1759:                        roff_setstr(r, r->last->name, buf->buf + ppos, 2);
1.277     schwarze 1760:                return ROFF_IGN;
1.106     kristaps 1761:        }
1.79      kristaps 1762:
1.277     schwarze 1763:        return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
1.79      kristaps 1764: }
                   1765:
                   1766: static enum rofferr
1.80      kristaps 1767: roff_block_text(ROFF_ARGS)
1.78      kristaps 1768: {
                   1769:
1.238     schwarze 1770:        if (tok != ROFF_ig)
                   1771:                roff_setstr(r, r->last->name, buf->buf + pos, 2);
1.106     kristaps 1772:
1.277     schwarze 1773:        return ROFF_IGN;
1.78      kristaps 1774: }
                   1775:
                   1776: static enum rofferr
1.82      kristaps 1777: roff_cond_sub(ROFF_ARGS)
                   1778: {
1.294   ! schwarze 1779:        enum roff_tok    t;
1.139     kristaps 1780:        char            *ep;
1.198     schwarze 1781:        int              rr;
1.82      kristaps 1782:
                   1783:        rr = r->last->rule;
1.139     kristaps 1784:        roffnode_cleanscope(r);
1.238     schwarze 1785:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.82      kristaps 1786:
1.139     kristaps 1787:        /*
1.177     schwarze 1788:         * Fully handle known macros when they are structurally
                   1789:         * required or when the conditional evaluated to true.
1.87      kristaps 1790:         */
                   1791:
1.294   ! schwarze 1792:        if (t != TOKEN_NONE && (rr || roffs[t].flags & ROFFMAC_STRUCT))
1.277     schwarze 1793:                return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
1.144     kristaps 1794:
1.196     schwarze 1795:        /*
                   1796:         * If `\}' occurs on a macro line without a preceding macro,
                   1797:         * drop the line completely.
                   1798:         */
                   1799:
1.238     schwarze 1800:        ep = buf->buf + pos;
                   1801:        if (ep[0] == '\\' && ep[1] == '}')
1.198     schwarze 1802:                rr = 0;
1.196     schwarze 1803:
1.177     schwarze 1804:        /* Always check for the closing delimiter `\}'. */
1.144     kristaps 1805:
1.238     schwarze 1806:        while ((ep = strchr(ep, '\\')) != NULL) {
                   1807:                if (*(++ep) == '}') {
1.197     schwarze 1808:                        *ep = '&';
1.238     schwarze 1809:                        roff_ccond(r, ln, ep - buf->buf - 1);
1.197     schwarze 1810:                }
1.247     schwarze 1811:                if (*ep != '\0')
                   1812:                        ++ep;
1.177     schwarze 1813:        }
1.277     schwarze 1814:        return rr ? ROFF_CONT : ROFF_IGN;
1.82      kristaps 1815: }
                   1816:
                   1817: static enum rofferr
                   1818: roff_cond_text(ROFF_ARGS)
1.78      kristaps 1819: {
1.140     kristaps 1820:        char            *ep;
1.198     schwarze 1821:        int              rr;
1.82      kristaps 1822:
                   1823:        rr = r->last->rule;
1.140     kristaps 1824:        roffnode_cleanscope(r);
1.82      kristaps 1825:
1.238     schwarze 1826:        ep = buf->buf + pos;
                   1827:        while ((ep = strchr(ep, '\\')) != NULL) {
                   1828:                if (*(++ep) == '}') {
1.197     schwarze 1829:                        *ep = '&';
1.238     schwarze 1830:                        roff_ccond(r, ln, ep - buf->buf - 1);
1.197     schwarze 1831:                }
1.247     schwarze 1832:                if (*ep != '\0')
                   1833:                        ++ep;
1.78      kristaps 1834:        }
1.277     schwarze 1835:        return rr ? ROFF_CONT : ROFF_IGN;
1.74      kristaps 1836: }
                   1837:
1.266     schwarze 1838: /* --- handling of numeric and conditional expressions -------------------- */
                   1839:
1.204     schwarze 1840: /*
                   1841:  * Parse a single signed integer number.  Stop at the first non-digit.
                   1842:  * If there is at least one digit, return success and advance the
                   1843:  * parse point, else return failure and let the parse point unchanged.
                   1844:  * Ignore overflows, treat them just like the C language.
                   1845:  */
1.184     schwarze 1846: static int
1.261     schwarze 1847: roff_getnum(const char *v, int *pos, int *res, int flags)
1.184     schwarze 1848: {
1.261     schwarze 1849:        int      myres, scaled, n, p;
1.206     schwarze 1850:
                   1851:        if (NULL == res)
                   1852:                res = &myres;
1.184     schwarze 1853:
                   1854:        p = *pos;
                   1855:        n = v[p] == '-';
1.261     schwarze 1856:        if (n || v[p] == '+')
1.184     schwarze 1857:                p++;
                   1858:
1.261     schwarze 1859:        if (flags & ROFFNUM_WHITE)
                   1860:                while (isspace((unsigned char)v[p]))
                   1861:                        p++;
                   1862:
1.184     schwarze 1863:        for (*res = 0; isdigit((unsigned char)v[p]); p++)
1.204     schwarze 1864:                *res = 10 * *res + v[p] - '0';
1.184     schwarze 1865:        if (p == *pos + n)
                   1866:                return 0;
                   1867:
                   1868:        if (n)
                   1869:                *res = -*res;
                   1870:
1.254     schwarze 1871:        /* Each number may be followed by one optional scaling unit. */
                   1872:
                   1873:        switch (v[p]) {
                   1874:        case 'f':
1.261     schwarze 1875:                scaled = *res * 65536;
1.254     schwarze 1876:                break;
                   1877:        case 'i':
1.261     schwarze 1878:                scaled = *res * 240;
1.254     schwarze 1879:                break;
                   1880:        case 'c':
1.261     schwarze 1881:                scaled = *res * 240 / 2.54;
1.254     schwarze 1882:                break;
                   1883:        case 'v':
                   1884:        case 'P':
1.261     schwarze 1885:                scaled = *res * 40;
1.254     schwarze 1886:                break;
                   1887:        case 'm':
                   1888:        case 'n':
1.261     schwarze 1889:                scaled = *res * 24;
1.254     schwarze 1890:                break;
                   1891:        case 'p':
1.261     schwarze 1892:                scaled = *res * 10 / 3;
1.254     schwarze 1893:                break;
                   1894:        case 'u':
1.261     schwarze 1895:                scaled = *res;
1.254     schwarze 1896:                break;
                   1897:        case 'M':
1.261     schwarze 1898:                scaled = *res * 6 / 25;
1.254     schwarze 1899:                break;
                   1900:        default:
1.261     schwarze 1901:                scaled = *res;
1.254     schwarze 1902:                p--;
                   1903:                break;
                   1904:        }
1.261     schwarze 1905:        if (flags & ROFFNUM_SCALE)
                   1906:                *res = scaled;
1.254     schwarze 1907:
                   1908:        *pos = p + 1;
1.277     schwarze 1909:        return 1;
1.184     schwarze 1910: }
                   1911:
1.198     schwarze 1912: /*
                   1913:  * Evaluate a string comparison condition.
                   1914:  * The first character is the delimiter.
                   1915:  * Succeed if the string up to its second occurrence
                   1916:  * matches the string up to its third occurence.
                   1917:  * Advance the cursor after the third occurrence
                   1918:  * or lacking that, to the end of the line.
                   1919:  */
                   1920: static int
                   1921: roff_evalstrcond(const char *v, int *pos)
                   1922: {
                   1923:        const char      *s1, *s2, *s3;
                   1924:        int              match;
                   1925:
                   1926:        match = 0;
                   1927:        s1 = v + *pos;          /* initial delimiter */
                   1928:        s2 = s1 + 1;            /* for scanning the first string */
                   1929:        s3 = strchr(s2, *s1);   /* for scanning the second string */
                   1930:
                   1931:        if (NULL == s3)         /* found no middle delimiter */
                   1932:                goto out;
                   1933:
                   1934:        while ('\0' != *++s3) {
                   1935:                if (*s2 != *s3) {  /* mismatch */
                   1936:                        s3 = strchr(s3, *s1);
                   1937:                        break;
                   1938:                }
                   1939:                if (*s3 == *s1) {  /* found the final delimiter */
                   1940:                        match = 1;
                   1941:                        break;
                   1942:                }
                   1943:                s2++;
                   1944:        }
                   1945:
                   1946: out:
                   1947:        if (NULL == s3)
                   1948:                s3 = strchr(s2, '\0');
1.242     schwarze 1949:        else if (*s3 != '\0')
1.198     schwarze 1950:                s3++;
                   1951:        *pos = s3 - v;
1.277     schwarze 1952:        return match;
1.198     schwarze 1953: }
                   1954:
1.204     schwarze 1955: /*
                   1956:  * Evaluate an optionally negated single character, numerical,
                   1957:  * or string condition.
                   1958:  */
1.198     schwarze 1959: static int
1.271     schwarze 1960: roff_evalcond(struct roff *r, int ln, char *v, int *pos)
1.88      kristaps 1961: {
1.271     schwarze 1962:        char    *cp, *name;
                   1963:        size_t   sz;
1.241     schwarze 1964:        int      number, savepos, wanttrue;
1.88      kristaps 1965:
1.198     schwarze 1966:        if ('!' == v[*pos]) {
                   1967:                wanttrue = 0;
                   1968:                (*pos)++;
                   1969:        } else
                   1970:                wanttrue = 1;
                   1971:
1.88      kristaps 1972:        switch (v[*pos]) {
1.240     schwarze 1973:        case '\0':
1.277     schwarze 1974:                return 0;
1.207     schwarze 1975:        case 'n':
                   1976:        case 'o':
1.88      kristaps 1977:                (*pos)++;
1.277     schwarze 1978:                return wanttrue;
1.207     schwarze 1979:        case 'c':
                   1980:        case 'd':
                   1981:        case 'e':
                   1982:        case 't':
1.239     schwarze 1983:        case 'v':
1.88      kristaps 1984:                (*pos)++;
1.277     schwarze 1985:                return !wanttrue;
1.271     schwarze 1986:        case 'r':
                   1987:                cp = name = v + ++*pos;
                   1988:                sz = roff_getname(r, &cp, ln, *pos);
                   1989:                *pos = cp - v;
1.277     schwarze 1990:                return (sz && roff_hasregn(r, name, sz)) == wanttrue;
1.88      kristaps 1991:        default:
                   1992:                break;
                   1993:        }
                   1994:
1.241     schwarze 1995:        savepos = *pos;
1.261     schwarze 1996:        if (roff_evalnum(r, ln, v, pos, &number, ROFFNUM_SCALE))
1.277     schwarze 1997:                return (number > 0) == wanttrue;
1.241     schwarze 1998:        else if (*pos == savepos)
1.277     schwarze 1999:                return roff_evalstrcond(v, pos) == wanttrue;
1.204     schwarze 2000:        else
1.277     schwarze 2001:                return 0;
1.88      kristaps 2002: }
                   2003:
1.74      kristaps 2004: static enum rofferr
1.103     kristaps 2005: roff_line_ignore(ROFF_ARGS)
1.89      kristaps 2006: {
1.123     schwarze 2007:
1.277     schwarze 2008:        return ROFF_IGN;
1.89      kristaps 2009: }
                   2010:
1.104     kristaps 2011: static enum rofferr
1.251     schwarze 2012: roff_insec(ROFF_ARGS)
                   2013: {
                   2014:
                   2015:        mandoc_msg(MANDOCERR_REQ_INSEC, r->parse,
                   2016:            ln, ppos, roffs[tok].name);
1.277     schwarze 2017:        return ROFF_IGN;
1.251     schwarze 2018: }
                   2019:
                   2020: static enum rofferr
                   2021: roff_unsupp(ROFF_ARGS)
                   2022: {
                   2023:
                   2024:        mandoc_msg(MANDOCERR_REQ_UNSUPP, r->parse,
                   2025:            ln, ppos, roffs[tok].name);
1.277     schwarze 2026:        return ROFF_IGN;
1.251     schwarze 2027: }
                   2028:
                   2029: static enum rofferr
1.82      kristaps 2030: roff_cond(ROFF_ARGS)
1.74      kristaps 2031: {
1.173     schwarze 2032:
                   2033:        roffnode_push(r, tok, NULL, ln, ppos);
1.74      kristaps 2034:
1.207     schwarze 2035:        /*
1.134     kristaps 2036:         * An `.el' has no conditional body: it will consume the value
                   2037:         * of the current rstack entry set in prior `ie' calls or
1.207     schwarze 2038:         * defaults to DENY.
1.134     kristaps 2039:         *
                   2040:         * If we're not an `el', however, then evaluate the conditional.
                   2041:         */
1.133     kristaps 2042:
1.238     schwarze 2043:        r->last->rule = tok == ROFF_el ?
1.207     schwarze 2044:            (r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) :
1.238     schwarze 2045:            roff_evalcond(r, ln, buf->buf, &pos);
1.77      kristaps 2046:
1.134     kristaps 2047:        /*
                   2048:         * An if-else will put the NEGATION of the current evaluated
                   2049:         * conditional into the stack of rules.
                   2050:         */
                   2051:
1.238     schwarze 2052:        if (tok == ROFF_ie) {
1.223     schwarze 2053:                if (r->rstackpos + 1 == r->rstacksz) {
                   2054:                        r->rstacksz += 16;
                   2055:                        r->rstack = mandoc_reallocarray(r->rstack,
                   2056:                            r->rstacksz, sizeof(int));
1.134     kristaps 2057:                }
1.198     schwarze 2058:                r->rstack[++r->rstackpos] = !r->last->rule;
1.82      kristaps 2059:        }
1.88      kristaps 2060:
                   2061:        /* If the parent has false as its rule, then so do we. */
                   2062:
1.198     schwarze 2063:        if (r->last->parent && !r->last->parent->rule)
                   2064:                r->last->rule = 0;
1.88      kristaps 2065:
                   2066:        /*
1.173     schwarze 2067:         * Determine scope.
                   2068:         * If there is nothing on the line after the conditional,
                   2069:         * not even whitespace, use next-line scope.
1.88      kristaps 2070:         */
1.74      kristaps 2071:
1.238     schwarze 2072:        if (buf->buf[pos] == '\0') {
1.173     schwarze 2073:                r->last->endspan = 2;
                   2074:                goto out;
                   2075:        }
                   2076:
1.238     schwarze 2077:        while (buf->buf[pos] == ' ')
1.173     schwarze 2078:                pos++;
                   2079:
                   2080:        /* An opening brace requests multiline scope. */
1.75      kristaps 2081:
1.238     schwarze 2082:        if (buf->buf[pos] == '\\' && buf->buf[pos + 1] == '{') {
1.75      kristaps 2083:                r->last->endspan = -1;
                   2084:                pos += 2;
1.272     schwarze 2085:                while (buf->buf[pos] == ' ')
                   2086:                        pos++;
1.173     schwarze 2087:                goto out;
1.207     schwarze 2088:        }
1.74      kristaps 2089:
1.77      kristaps 2090:        /*
1.173     schwarze 2091:         * Anything else following the conditional causes
                   2092:         * single-line scope.  Warn if the scope contains
                   2093:         * nothing but trailing whitespace.
1.77      kristaps 2094:         */
                   2095:
1.238     schwarze 2096:        if (buf->buf[pos] == '\0')
1.216     schwarze 2097:                mandoc_msg(MANDOCERR_COND_EMPTY, r->parse,
                   2098:                    ln, ppos, roffs[tok].name);
1.77      kristaps 2099:
1.173     schwarze 2100:        r->last->endspan = 1;
1.74      kristaps 2101:
1.173     schwarze 2102: out:
1.75      kristaps 2103:        *offs = pos;
1.277     schwarze 2104:        return ROFF_RERUN;
1.83      schwarze 2105: }
                   2106:
                   2107: static enum rofferr
1.92      schwarze 2108: roff_ds(ROFF_ARGS)
                   2109: {
1.212     schwarze 2110:        char            *string;
                   2111:        const char      *name;
                   2112:        size_t           namesz;
1.96      kristaps 2113:
1.251     schwarze 2114:        /* Ignore groff compatibility mode for now. */
                   2115:
                   2116:        if (tok == ROFF_ds1)
                   2117:                tok = ROFF_ds;
                   2118:        else if (tok == ROFF_as1)
                   2119:                tok = ROFF_as;
                   2120:
1.96      kristaps 2121:        /*
1.212     schwarze 2122:         * The first word is the name of the string.
                   2123:         * If it is empty or terminated by an escape sequence,
                   2124:         * abort the `ds' request without defining anything.
1.96      kristaps 2125:         */
1.92      schwarze 2126:
1.238     schwarze 2127:        name = string = buf->buf + pos;
                   2128:        if (*name == '\0')
1.277     schwarze 2129:                return ROFF_IGN;
1.92      schwarze 2130:
1.212     schwarze 2131:        namesz = roff_getname(r, &string, ln, pos);
1.238     schwarze 2132:        if (name[namesz] == '\\')
1.277     schwarze 2133:                return ROFF_IGN;
1.212     schwarze 2134:
                   2135:        /* Read past the initial double-quote, if any. */
1.238     schwarze 2136:        if (*string == '"')
1.92      schwarze 2137:                string++;
                   2138:
1.96      kristaps 2139:        /* The rest is the value. */
1.212     schwarze 2140:        roff_setstrn(&r->strtab, name, namesz, string, strlen(string),
                   2141:            ROFF_as == tok);
1.277     schwarze 2142:        return ROFF_IGN;
1.92      schwarze 2143: }
                   2144:
1.204     schwarze 2145: /*
                   2146:  * Parse a single operator, one or two characters long.
                   2147:  * If the operator is recognized, return success and advance the
                   2148:  * parse point, else return failure and let the parse point unchanged.
                   2149:  */
                   2150: static int
                   2151: roff_getop(const char *v, int *pos, char *res)
                   2152: {
                   2153:
                   2154:        *res = v[*pos];
                   2155:
                   2156:        switch (*res) {
1.207     schwarze 2157:        case '+':
                   2158:        case '-':
                   2159:        case '*':
                   2160:        case '/':
                   2161:        case '%':
                   2162:        case '&':
                   2163:        case ':':
1.204     schwarze 2164:                break;
                   2165:        case '<':
                   2166:                switch (v[*pos + 1]) {
1.207     schwarze 2167:                case '=':
1.204     schwarze 2168:                        *res = 'l';
                   2169:                        (*pos)++;
                   2170:                        break;
1.207     schwarze 2171:                case '>':
1.204     schwarze 2172:                        *res = '!';
                   2173:                        (*pos)++;
                   2174:                        break;
1.207     schwarze 2175:                case '?':
1.204     schwarze 2176:                        *res = 'i';
                   2177:                        (*pos)++;
                   2178:                        break;
                   2179:                default:
                   2180:                        break;
                   2181:                }
                   2182:                break;
                   2183:        case '>':
                   2184:                switch (v[*pos + 1]) {
1.207     schwarze 2185:                case '=':
1.204     schwarze 2186:                        *res = 'g';
                   2187:                        (*pos)++;
                   2188:                        break;
1.207     schwarze 2189:                case '?':
1.204     schwarze 2190:                        *res = 'a';
                   2191:                        (*pos)++;
                   2192:                        break;
                   2193:                default:
                   2194:                        break;
                   2195:                }
                   2196:                break;
                   2197:        case '=':
                   2198:                if ('=' == v[*pos + 1])
                   2199:                        (*pos)++;
                   2200:                break;
                   2201:        default:
1.277     schwarze 2202:                return 0;
1.204     schwarze 2203:        }
                   2204:        (*pos)++;
                   2205:
1.277     schwarze 2206:        return *res;
1.204     schwarze 2207: }
                   2208:
                   2209: /*
                   2210:  * Evaluate either a parenthesized numeric expression
                   2211:  * or a single signed integer number.
                   2212:  */
                   2213: static int
1.235     schwarze 2214: roff_evalpar(struct roff *r, int ln,
1.261     schwarze 2215:        const char *v, int *pos, int *res, int flags)
1.204     schwarze 2216: {
                   2217:
                   2218:        if ('(' != v[*pos])
1.277     schwarze 2219:                return roff_getnum(v, pos, res, flags);
1.204     schwarze 2220:
                   2221:        (*pos)++;
1.261     schwarze 2222:        if ( ! roff_evalnum(r, ln, v, pos, res, flags | ROFFNUM_WHITE))
1.277     schwarze 2223:                return 0;
1.204     schwarze 2224:
1.206     schwarze 2225:        /*
                   2226:         * Omission of the closing parenthesis
                   2227:         * is an error in validation mode,
                   2228:         * but ignored in evaluation mode.
                   2229:         */
                   2230:
1.204     schwarze 2231:        if (')' == v[*pos])
                   2232:                (*pos)++;
1.206     schwarze 2233:        else if (NULL == res)
1.277     schwarze 2234:                return 0;
1.204     schwarze 2235:
1.277     schwarze 2236:        return 1;
1.204     schwarze 2237: }
                   2238:
                   2239: /*
                   2240:  * Evaluate a complete numeric expression.
                   2241:  * Proceed left to right, there is no concept of precedence.
                   2242:  */
                   2243: static int
1.235     schwarze 2244: roff_evalnum(struct roff *r, int ln, const char *v,
1.261     schwarze 2245:        int *pos, int *res, int flags)
1.204     schwarze 2246: {
                   2247:        int              mypos, operand2;
                   2248:        char             operator;
                   2249:
                   2250:        if (NULL == pos) {
                   2251:                mypos = 0;
                   2252:                pos = &mypos;
                   2253:        }
                   2254:
1.261     schwarze 2255:        if (flags & ROFFNUM_WHITE)
1.204     schwarze 2256:                while (isspace((unsigned char)v[*pos]))
                   2257:                        (*pos)++;
                   2258:
1.261     schwarze 2259:        if ( ! roff_evalpar(r, ln, v, pos, res, flags))
1.277     schwarze 2260:                return 0;
1.204     schwarze 2261:
                   2262:        while (1) {
1.261     schwarze 2263:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2264:                        while (isspace((unsigned char)v[*pos]))
                   2265:                                (*pos)++;
                   2266:
                   2267:                if ( ! roff_getop(v, pos, &operator))
                   2268:                        break;
                   2269:
1.261     schwarze 2270:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2271:                        while (isspace((unsigned char)v[*pos]))
                   2272:                                (*pos)++;
                   2273:
1.261     schwarze 2274:                if ( ! roff_evalpar(r, ln, v, pos, &operand2, flags))
1.277     schwarze 2275:                        return 0;
1.204     schwarze 2276:
1.261     schwarze 2277:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2278:                        while (isspace((unsigned char)v[*pos]))
                   2279:                                (*pos)++;
1.206     schwarze 2280:
                   2281:                if (NULL == res)
                   2282:                        continue;
1.204     schwarze 2283:
                   2284:                switch (operator) {
1.207     schwarze 2285:                case '+':
1.204     schwarze 2286:                        *res += operand2;
                   2287:                        break;
1.207     schwarze 2288:                case '-':
1.204     schwarze 2289:                        *res -= operand2;
                   2290:                        break;
1.207     schwarze 2291:                case '*':
1.204     schwarze 2292:                        *res *= operand2;
                   2293:                        break;
1.207     schwarze 2294:                case '/':
1.244     schwarze 2295:                        if (operand2 == 0) {
1.235     schwarze 2296:                                mandoc_msg(MANDOCERR_DIVZERO,
1.234     kristaps 2297:                                        r->parse, ln, *pos, v);
                   2298:                                *res = 0;
                   2299:                                break;
                   2300:                        }
1.204     schwarze 2301:                        *res /= operand2;
                   2302:                        break;
1.207     schwarze 2303:                case '%':
1.244     schwarze 2304:                        if (operand2 == 0) {
                   2305:                                mandoc_msg(MANDOCERR_DIVZERO,
                   2306:                                        r->parse, ln, *pos, v);
                   2307:                                *res = 0;
                   2308:                                break;
                   2309:                        }
1.204     schwarze 2310:                        *res %= operand2;
                   2311:                        break;
1.207     schwarze 2312:                case '<':
1.204     schwarze 2313:                        *res = *res < operand2;
                   2314:                        break;
1.207     schwarze 2315:                case '>':
1.204     schwarze 2316:                        *res = *res > operand2;
                   2317:                        break;
1.207     schwarze 2318:                case 'l':
1.204     schwarze 2319:                        *res = *res <= operand2;
                   2320:                        break;
1.207     schwarze 2321:                case 'g':
1.204     schwarze 2322:                        *res = *res >= operand2;
                   2323:                        break;
1.207     schwarze 2324:                case '=':
1.204     schwarze 2325:                        *res = *res == operand2;
                   2326:                        break;
1.207     schwarze 2327:                case '!':
1.204     schwarze 2328:                        *res = *res != operand2;
                   2329:                        break;
1.207     schwarze 2330:                case '&':
1.204     schwarze 2331:                        *res = *res && operand2;
                   2332:                        break;
1.207     schwarze 2333:                case ':':
1.204     schwarze 2334:                        *res = *res || operand2;
                   2335:                        break;
1.207     schwarze 2336:                case 'i':
1.204     schwarze 2337:                        if (operand2 < *res)
                   2338:                                *res = operand2;
                   2339:                        break;
1.207     schwarze 2340:                case 'a':
1.204     schwarze 2341:                        if (operand2 > *res)
                   2342:                                *res = operand2;
                   2343:                        break;
                   2344:                default:
                   2345:                        abort();
                   2346:                }
                   2347:        }
1.277     schwarze 2348:        return 1;
1.204     schwarze 2349: }
                   2350:
1.266     schwarze 2351: /* --- register management ------------------------------------------------ */
                   2352:
1.180     schwarze 2353: void
1.187     schwarze 2354: roff_setreg(struct roff *r, const char *name, int val, char sign)
1.147     kristaps 2355: {
1.180     schwarze 2356:        struct roffreg  *reg;
                   2357:
                   2358:        /* Search for an existing register with the same name. */
                   2359:        reg = r->regtab;
                   2360:
                   2361:        while (reg && strcmp(name, reg->key.p))
                   2362:                reg = reg->next;
1.147     kristaps 2363:
1.180     schwarze 2364:        if (NULL == reg) {
                   2365:                /* Create a new register. */
                   2366:                reg = mandoc_malloc(sizeof(struct roffreg));
                   2367:                reg->key.p = mandoc_strdup(name);
                   2368:                reg->key.sz = strlen(name);
1.187     schwarze 2369:                reg->val = 0;
1.180     schwarze 2370:                reg->next = r->regtab;
                   2371:                r->regtab = reg;
                   2372:        }
                   2373:
1.187     schwarze 2374:        if ('+' == sign)
                   2375:                reg->val += val;
                   2376:        else if ('-' == sign)
                   2377:                reg->val -= val;
                   2378:        else
                   2379:                reg->val = val;
1.147     kristaps 2380: }
                   2381:
1.192     schwarze 2382: /*
                   2383:  * Handle some predefined read-only number registers.
                   2384:  * For now, return -1 if the requested register is not predefined;
                   2385:  * in case a predefined read-only register having the value -1
                   2386:  * were to turn up, another special value would have to be chosen.
                   2387:  */
                   2388: static int
1.273     schwarze 2389: roff_getregro(const struct roff *r, const char *name)
1.192     schwarze 2390: {
                   2391:
                   2392:        switch (*name) {
1.273     schwarze 2393:        case '$':  /* Number of arguments of the last macro evaluated. */
1.277     schwarze 2394:                return r->argc;
1.207     schwarze 2395:        case 'A':  /* ASCII approximation mode is always off. */
1.277     schwarze 2396:                return 0;
1.207     schwarze 2397:        case 'g':  /* Groff compatibility mode is always on. */
1.277     schwarze 2398:                return 1;
1.207     schwarze 2399:        case 'H':  /* Fixed horizontal resolution. */
1.277     schwarze 2400:                return 24;
1.207     schwarze 2401:        case 'j':  /* Always adjust left margin only. */
1.277     schwarze 2402:                return 0;
1.207     schwarze 2403:        case 'T':  /* Some output device is always defined. */
1.277     schwarze 2404:                return 1;
1.207     schwarze 2405:        case 'V':  /* Fixed vertical resolution. */
1.277     schwarze 2406:                return 40;
1.192     schwarze 2407:        default:
1.277     schwarze 2408:                return -1;
1.192     schwarze 2409:        }
                   2410: }
                   2411:
1.181     schwarze 2412: int
1.180     schwarze 2413: roff_getreg(const struct roff *r, const char *name)
1.147     kristaps 2414: {
1.180     schwarze 2415:        struct roffreg  *reg;
1.192     schwarze 2416:        int              val;
                   2417:
                   2418:        if ('.' == name[0] && '\0' != name[1] && '\0' == name[2]) {
1.273     schwarze 2419:                val = roff_getregro(r, name + 1);
1.192     schwarze 2420:                if (-1 != val)
1.277     schwarze 2421:                        return val;
1.192     schwarze 2422:        }
1.180     schwarze 2423:
                   2424:        for (reg = r->regtab; reg; reg = reg->next)
                   2425:                if (0 == strcmp(name, reg->key.p))
1.277     schwarze 2426:                        return reg->val;
1.181     schwarze 2427:
1.277     schwarze 2428:        return 0;
1.181     schwarze 2429: }
                   2430:
                   2431: static int
                   2432: roff_getregn(const struct roff *r, const char *name, size_t len)
                   2433: {
                   2434:        struct roffreg  *reg;
1.192     schwarze 2435:        int              val;
                   2436:
                   2437:        if ('.' == name[0] && 2 == len) {
1.273     schwarze 2438:                val = roff_getregro(r, name + 1);
1.192     schwarze 2439:                if (-1 != val)
1.277     schwarze 2440:                        return val;
1.192     schwarze 2441:        }
1.181     schwarze 2442:
                   2443:        for (reg = r->regtab; reg; reg = reg->next)
                   2444:                if (len == reg->key.sz &&
                   2445:                    0 == strncmp(name, reg->key.p, len))
1.277     schwarze 2446:                        return reg->val;
1.271     schwarze 2447:
1.277     schwarze 2448:        return 0;
1.271     schwarze 2449: }
                   2450:
                   2451: static int
                   2452: roff_hasregn(const struct roff *r, const char *name, size_t len)
                   2453: {
                   2454:        struct roffreg  *reg;
                   2455:        int              val;
                   2456:
                   2457:        if ('.' == name[0] && 2 == len) {
1.273     schwarze 2458:                val = roff_getregro(r, name + 1);
1.271     schwarze 2459:                if (-1 != val)
1.277     schwarze 2460:                        return 1;
1.271     schwarze 2461:        }
                   2462:
                   2463:        for (reg = r->regtab; reg; reg = reg->next)
                   2464:                if (len == reg->key.sz &&
                   2465:                    0 == strncmp(name, reg->key.p, len))
1.277     schwarze 2466:                        return 1;
1.147     kristaps 2467:
1.277     schwarze 2468:        return 0;
1.147     kristaps 2469: }
                   2470:
1.180     schwarze 2471: static void
                   2472: roff_freereg(struct roffreg *reg)
1.147     kristaps 2473: {
1.180     schwarze 2474:        struct roffreg  *old_reg;
1.147     kristaps 2475:
1.180     schwarze 2476:        while (NULL != reg) {
                   2477:                free(reg->key.p);
                   2478:                old_reg = reg;
                   2479:                reg = reg->next;
                   2480:                free(old_reg);
                   2481:        }
1.147     kristaps 2482: }
1.92      schwarze 2483:
                   2484: static enum rofferr
1.89      kristaps 2485: roff_nr(ROFF_ARGS)
1.83      schwarze 2486: {
1.212     schwarze 2487:        char            *key, *val;
                   2488:        size_t           keysz;
1.138     kristaps 2489:        int              iv;
1.187     schwarze 2490:        char             sign;
1.89      kristaps 2491:
1.238     schwarze 2492:        key = val = buf->buf + pos;
                   2493:        if (*key == '\0')
1.277     schwarze 2494:                return ROFF_IGN;
1.212     schwarze 2495:
                   2496:        keysz = roff_getname(r, &val, ln, pos);
1.238     schwarze 2497:        if (key[keysz] == '\\')
1.277     schwarze 2498:                return ROFF_IGN;
1.212     schwarze 2499:        key[keysz] = '\0';
1.89      kristaps 2500:
1.187     schwarze 2501:        sign = *val;
1.238     schwarze 2502:        if (sign == '+' || sign == '-')
1.187     schwarze 2503:                val++;
                   2504:
1.261     schwarze 2505:        if (roff_evalnum(r, ln, val, NULL, &iv, ROFFNUM_SCALE))
1.204     schwarze 2506:                roff_setreg(r, key, iv, sign);
1.109     kristaps 2507:
1.277     schwarze 2508:        return ROFF_IGN;
1.203     schwarze 2509: }
                   2510:
                   2511: static enum rofferr
                   2512: roff_rr(ROFF_ARGS)
                   2513: {
                   2514:        struct roffreg  *reg, **prev;
1.212     schwarze 2515:        char            *name, *cp;
                   2516:        size_t           namesz;
1.203     schwarze 2517:
1.238     schwarze 2518:        name = cp = buf->buf + pos;
                   2519:        if (*name == '\0')
1.277     schwarze 2520:                return ROFF_IGN;
1.212     schwarze 2521:        namesz = roff_getname(r, &cp, ln, pos);
                   2522:        name[namesz] = '\0';
1.203     schwarze 2523:
                   2524:        prev = &r->regtab;
                   2525:        while (1) {
                   2526:                reg = *prev;
1.238     schwarze 2527:                if (reg == NULL || !strcmp(name, reg->key.p))
1.203     schwarze 2528:                        break;
                   2529:                prev = &reg->next;
                   2530:        }
1.238     schwarze 2531:        if (reg != NULL) {
1.203     schwarze 2532:                *prev = reg->next;
                   2533:                free(reg->key.p);
                   2534:                free(reg);
                   2535:        }
1.277     schwarze 2536:        return ROFF_IGN;
1.122     schwarze 2537: }
                   2538:
1.266     schwarze 2539: /* --- handler functions for roff requests -------------------------------- */
                   2540:
1.122     schwarze 2541: static enum rofferr
                   2542: roff_rm(ROFF_ARGS)
                   2543: {
                   2544:        const char       *name;
                   2545:        char             *cp;
1.212     schwarze 2546:        size_t            namesz;
1.122     schwarze 2547:
1.238     schwarze 2548:        cp = buf->buf + pos;
                   2549:        while (*cp != '\0') {
1.212     schwarze 2550:                name = cp;
1.238     schwarze 2551:                namesz = roff_getname(r, &cp, ln, (int)(cp - buf->buf));
1.212     schwarze 2552:                roff_setstrn(&r->strtab, name, namesz, NULL, 0, 0);
1.238     schwarze 2553:                if (name[namesz] == '\\')
1.212     schwarze 2554:                        break;
1.122     schwarze 2555:        }
1.277     schwarze 2556:        return ROFF_IGN;
1.178     schwarze 2557: }
                   2558:
                   2559: static enum rofferr
                   2560: roff_it(ROFF_ARGS)
                   2561: {
                   2562:        int              iv;
                   2563:
                   2564:        /* Parse the number of lines. */
1.261     schwarze 2565:
                   2566:        if ( ! roff_evalnum(r, ln, buf->buf, &pos, &iv, 0)) {
1.222     schwarze 2567:                mandoc_msg(MANDOCERR_IT_NONUM, r->parse,
1.238     schwarze 2568:                    ln, ppos, buf->buf + 1);
1.277     schwarze 2569:                return ROFF_IGN;
1.178     schwarze 2570:        }
                   2571:
1.262     schwarze 2572:        while (isspace((unsigned char)buf->buf[pos]))
                   2573:                pos++;
                   2574:
                   2575:        /*
                   2576:         * Arm the input line trap.
                   2577:         * Special-casing "an-trap" is an ugly workaround to cope
                   2578:         * with DocBook stupidly fiddling with man(7) internals.
                   2579:         */
1.261     schwarze 2580:
1.178     schwarze 2581:        roffit_lines = iv;
1.262     schwarze 2582:        roffit_macro = mandoc_strdup(iv != 1 ||
                   2583:            strcmp(buf->buf + pos, "an-trap") ?
                   2584:            buf->buf + pos : "br");
1.277     schwarze 2585:        return ROFF_IGN;
1.175     schwarze 2586: }
                   2587:
                   2588: static enum rofferr
                   2589: roff_Dd(ROFF_ARGS)
                   2590: {
                   2591:        const char *const       *cp;
                   2592:
1.227     schwarze 2593:        if ((r->options & (MPARSE_MDOC | MPARSE_QUICK)) == 0)
1.175     schwarze 2594:                for (cp = __mdoc_reserved; *cp; cp++)
                   2595:                        roff_setstr(r, *cp, NULL, 0);
                   2596:
1.227     schwarze 2597:        if (r->format == 0)
                   2598:                r->format = MPARSE_MDOC;
                   2599:
1.277     schwarze 2600:        return ROFF_CONT;
1.175     schwarze 2601: }
                   2602:
                   2603: static enum rofferr
                   2604: roff_TH(ROFF_ARGS)
                   2605: {
                   2606:        const char *const       *cp;
                   2607:
1.227     schwarze 2608:        if ((r->options & MPARSE_QUICK) == 0)
1.175     schwarze 2609:                for (cp = __man_reserved; *cp; cp++)
                   2610:                        roff_setstr(r, *cp, NULL, 0);
                   2611:
1.227     schwarze 2612:        if (r->format == 0)
                   2613:                r->format = MPARSE_MAN;
                   2614:
1.277     schwarze 2615:        return ROFF_CONT;
1.109     kristaps 2616: }
                   2617:
                   2618: static enum rofferr
                   2619: roff_TE(ROFF_ARGS)
                   2620: {
                   2621:
                   2622:        if (NULL == r->tbl)
1.221     schwarze 2623:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   2624:                    ln, ppos, "TE");
1.258     schwarze 2625:        else if ( ! tbl_end(&r->tbl)) {
                   2626:                free(buf->buf);
                   2627:                buf->buf = mandoc_strdup(".sp");
                   2628:                buf->sz = 4;
1.277     schwarze 2629:                return ROFF_REPARSE;
1.258     schwarze 2630:        }
1.277     schwarze 2631:        return ROFF_IGN;
1.112     kristaps 2632: }
                   2633:
                   2634: static enum rofferr
                   2635: roff_T_(ROFF_ARGS)
                   2636: {
                   2637:
                   2638:        if (NULL == r->tbl)
1.221     schwarze 2639:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   2640:                    ln, ppos, "T&");
1.112     kristaps 2641:        else
1.116     kristaps 2642:                tbl_restart(ppos, ln, r->tbl);
1.112     kristaps 2643:
1.277     schwarze 2644:        return ROFF_IGN;
1.109     kristaps 2645: }
                   2646:
1.230     schwarze 2647: /*
                   2648:  * Handle in-line equation delimiters.
                   2649:  */
                   2650: static enum rofferr
1.238     schwarze 2651: roff_eqndelim(struct roff *r, struct buf *buf, int pos)
1.151     kristaps 2652: {
1.233     schwarze 2653:        char            *cp1, *cp2;
                   2654:        const char      *bef_pr, *bef_nl, *mac, *aft_nl, *aft_pr;
1.151     kristaps 2655:
1.230     schwarze 2656:        /*
                   2657:         * Outside equations, look for an opening delimiter.
                   2658:         * If we are inside an equation, we already know it is
                   2659:         * in-line, or this function wouldn't have been called;
                   2660:         * so look for a closing delimiter.
                   2661:         */
                   2662:
1.238     schwarze 2663:        cp1 = buf->buf + pos;
1.230     schwarze 2664:        cp2 = strchr(cp1, r->eqn == NULL ?
                   2665:            r->last_eqn->odelim : r->last_eqn->cdelim);
                   2666:        if (cp2 == NULL)
1.277     schwarze 2667:                return ROFF_CONT;
1.230     schwarze 2668:
1.233     schwarze 2669:        *cp2++ = '\0';
                   2670:        bef_pr = bef_nl = aft_nl = aft_pr = "";
                   2671:
                   2672:        /* Handle preceding text, protecting whitespace. */
                   2673:
1.238     schwarze 2674:        if (*buf->buf != '\0') {
1.233     schwarze 2675:                if (r->eqn == NULL)
                   2676:                        bef_pr = "\\&";
                   2677:                bef_nl = "\n";
                   2678:        }
                   2679:
                   2680:        /*
                   2681:         * Prepare replacing the delimiter with an equation macro
                   2682:         * and drop leading white space from the equation.
                   2683:         */
1.230     schwarze 2684:
1.233     schwarze 2685:        if (r->eqn == NULL) {
                   2686:                while (*cp2 == ' ')
                   2687:                        cp2++;
                   2688:                mac = ".EQ";
                   2689:        } else
                   2690:                mac = ".EN";
                   2691:
                   2692:        /* Handle following text, protecting whitespace. */
                   2693:
                   2694:        if (*cp2 != '\0') {
                   2695:                aft_nl = "\n";
                   2696:                if (r->eqn != NULL)
                   2697:                        aft_pr = "\\&";
                   2698:        }
                   2699:
                   2700:        /* Do the actual replacement. */
                   2701:
1.238     schwarze 2702:        buf->sz = mandoc_asprintf(&cp1, "%s%s%s%s%s%s%s", buf->buf,
1.233     schwarze 2703:            bef_pr, bef_nl, mac, aft_nl, aft_pr, cp2) + 1;
1.238     schwarze 2704:        free(buf->buf);
                   2705:        buf->buf = cp1;
1.230     schwarze 2706:
                   2707:        /* Toggle the in-line state of the eqn subsystem. */
                   2708:
                   2709:        r->eqn_inline = r->eqn == NULL;
1.277     schwarze 2710:        return ROFF_REPARSE;
1.151     kristaps 2711: }
                   2712:
1.235     schwarze 2713: static enum rofferr
                   2714: roff_EQ(ROFF_ARGS)
1.125     kristaps 2715: {
1.151     kristaps 2716:        struct eqn_node *e;
1.125     kristaps 2717:
1.238     schwarze 2718:        assert(r->eqn == NULL);
1.235     schwarze 2719:        e = eqn_alloc(ppos, ln, r->parse);
1.125     kristaps 2720:
1.230     schwarze 2721:        if (r->last_eqn) {
1.125     kristaps 2722:                r->last_eqn->next = e;
1.230     schwarze 2723:                e->delim = r->last_eqn->delim;
                   2724:                e->odelim = r->last_eqn->odelim;
                   2725:                e->cdelim = r->last_eqn->cdelim;
                   2726:        } else
1.125     kristaps 2727:                r->first_eqn = r->last_eqn = e;
                   2728:
                   2729:        r->eqn = r->last_eqn = e;
1.151     kristaps 2730:
1.238     schwarze 2731:        if (buf->buf[pos] != '\0')
1.235     schwarze 2732:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238     schwarze 2733:                    ".EQ %s", buf->buf + pos);
1.151     kristaps 2734:
1.277     schwarze 2735:        return ROFF_IGN;
1.125     kristaps 2736: }
                   2737:
                   2738: static enum rofferr
                   2739: roff_EN(ROFF_ARGS)
                   2740: {
                   2741:
1.221     schwarze 2742:        mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse, ln, ppos, "EN");
1.277     schwarze 2743:        return ROFF_IGN;
1.125     kristaps 2744: }
                   2745:
                   2746: static enum rofferr
1.109     kristaps 2747: roff_TS(ROFF_ARGS)
                   2748: {
1.176     schwarze 2749:        struct tbl_node *tbl;
1.89      kristaps 2750:
1.115     kristaps 2751:        if (r->tbl) {
1.221     schwarze 2752:                mandoc_msg(MANDOCERR_BLK_BROKEN, r->parse,
                   2753:                    ln, ppos, "TS breaks TS");
1.151     kristaps 2754:                tbl_end(&r->tbl);
1.115     kristaps 2755:        }
1.83      schwarze 2756:
1.176     schwarze 2757:        tbl = tbl_alloc(ppos, ln, r->parse);
1.113     kristaps 2758:
                   2759:        if (r->last_tbl)
1.176     schwarze 2760:                r->last_tbl->next = tbl;
1.113     kristaps 2761:        else
1.176     schwarze 2762:                r->first_tbl = r->last_tbl = tbl;
1.113     kristaps 2763:
1.176     schwarze 2764:        r->tbl = r->last_tbl = tbl;
1.277     schwarze 2765:        return ROFF_IGN;
1.251     schwarze 2766: }
                   2767:
                   2768: static enum rofferr
                   2769: roff_brp(ROFF_ARGS)
                   2770: {
                   2771:
                   2772:        buf->buf[pos - 1] = '\0';
1.277     schwarze 2773:        return ROFF_CONT;
1.92      schwarze 2774: }
                   2775:
1.105     kristaps 2776: static enum rofferr
1.174     kristaps 2777: roff_cc(ROFF_ARGS)
                   2778: {
                   2779:        const char      *p;
                   2780:
1.238     schwarze 2781:        p = buf->buf + pos;
1.174     kristaps 2782:
1.238     schwarze 2783:        if (*p == '\0' || (r->control = *p++) == '.')
1.174     kristaps 2784:                r->control = 0;
                   2785:
1.238     schwarze 2786:        if (*p != '\0')
1.260     schwarze 2787:                mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
                   2788:                    ln, p - buf->buf, "cc ... %s", p);
1.174     kristaps 2789:
1.277     schwarze 2790:        return ROFF_IGN;
1.174     kristaps 2791: }
                   2792:
                   2793: static enum rofferr
1.164     kristaps 2794: roff_tr(ROFF_ARGS)
                   2795: {
                   2796:        const char      *p, *first, *second;
                   2797:        size_t           fsz, ssz;
                   2798:        enum mandoc_esc  esc;
                   2799:
1.238     schwarze 2800:        p = buf->buf + pos;
1.164     kristaps 2801:
1.238     schwarze 2802:        if (*p == '\0') {
1.260     schwarze 2803:                mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse, ln, ppos, "tr");
1.277     schwarze 2804:                return ROFF_IGN;
1.164     kristaps 2805:        }
                   2806:
1.238     schwarze 2807:        while (*p != '\0') {
1.164     kristaps 2808:                fsz = ssz = 1;
                   2809:
                   2810:                first = p++;
1.238     schwarze 2811:                if (*first == '\\') {
1.164     kristaps 2812:                        esc = mandoc_escape(&p, NULL, NULL);
1.238     schwarze 2813:                        if (esc == ESCAPE_ERROR) {
1.219     schwarze 2814:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 2815:                                    ln, (int)(p - buf->buf), first);
1.277     schwarze 2816:                                return ROFF_IGN;
1.164     kristaps 2817:                        }
                   2818:                        fsz = (size_t)(p - first);
                   2819:                }
                   2820:
                   2821:                second = p++;
1.238     schwarze 2822:                if (*second == '\\') {
1.164     kristaps 2823:                        esc = mandoc_escape(&p, NULL, NULL);
1.238     schwarze 2824:                        if (esc == ESCAPE_ERROR) {
1.219     schwarze 2825:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 2826:                                    ln, (int)(p - buf->buf), second);
1.277     schwarze 2827:                                return ROFF_IGN;
1.164     kristaps 2828:                        }
                   2829:                        ssz = (size_t)(p - second);
1.238     schwarze 2830:                } else if (*second == '\0') {
1.260     schwarze 2831:                        mandoc_vmsg(MANDOCERR_TR_ODD, r->parse,
                   2832:                            ln, first - buf->buf, "tr %s", first);
1.164     kristaps 2833:                        second = " ";
1.165     kristaps 2834:                        p--;
1.164     kristaps 2835:                }
                   2836:
1.167     kristaps 2837:                if (fsz > 1) {
1.207     schwarze 2838:                        roff_setstrn(&r->xmbtab, first, fsz,
                   2839:                            second, ssz, 0);
1.167     kristaps 2840:                        continue;
                   2841:                }
                   2842:
1.238     schwarze 2843:                if (r->xtab == NULL)
1.207     schwarze 2844:                        r->xtab = mandoc_calloc(128,
                   2845:                            sizeof(struct roffstr));
1.167     kristaps 2846:
                   2847:                free(r->xtab[(int)*first].p);
                   2848:                r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
                   2849:                r->xtab[(int)*first].sz = ssz;
1.164     kristaps 2850:        }
                   2851:
1.277     schwarze 2852:        return ROFF_IGN;
1.164     kristaps 2853: }
                   2854:
                   2855: static enum rofferr
1.105     kristaps 2856: roff_so(ROFF_ARGS)
                   2857: {
1.249     schwarze 2858:        char *name, *cp;
1.105     kristaps 2859:
1.238     schwarze 2860:        name = buf->buf + pos;
1.224     schwarze 2861:        mandoc_vmsg(MANDOCERR_SO, r->parse, ln, ppos, "so %s", name);
1.105     kristaps 2862:
                   2863:        /*
                   2864:         * Handle `so'.  Be EXTREMELY careful, as we shouldn't be
                   2865:         * opening anything that's not in our cwd or anything beneath
                   2866:         * it.  Thus, explicitly disallow traversing up the file-system
                   2867:         * or using absolute paths.
                   2868:         */
                   2869:
1.238     schwarze 2870:        if (*name == '/' || strstr(name, "../") || strstr(name, "/..")) {
1.210     schwarze 2871:                mandoc_vmsg(MANDOCERR_SO_PATH, r->parse, ln, ppos,
                   2872:                    ".so %s", name);
1.249     schwarze 2873:                buf->sz = mandoc_asprintf(&cp,
                   2874:                    ".sp\nSee the file %s.\n.sp", name) + 1;
                   2875:                free(buf->buf);
                   2876:                buf->buf = cp;
                   2877:                *offs = 0;
1.277     schwarze 2878:                return ROFF_REPARSE;
1.105     kristaps 2879:        }
                   2880:
                   2881:        *offs = pos;
1.277     schwarze 2882:        return ROFF_SO;
1.105     kristaps 2883: }
1.92      schwarze 2884:
1.266     schwarze 2885: /* --- user defined strings and macros ------------------------------------ */
                   2886:
1.106     kristaps 2887: static enum rofferr
                   2888: roff_userdef(ROFF_ARGS)
1.99      kristaps 2889: {
1.263     schwarze 2890:        const char       *arg[9], *ap;
1.106     kristaps 2891:        char             *cp, *n1, *n2;
1.292     schwarze 2892:        int               expand_count, i, ib, ie;
1.263     schwarze 2893:        size_t            asz, rsz;
1.106     kristaps 2894:
                   2895:        /*
                   2896:         * Collect pointers to macro argument strings
1.188     schwarze 2897:         * and NUL-terminate them.
1.106     kristaps 2898:         */
1.263     schwarze 2899:
1.273     schwarze 2900:        r->argc = 0;
1.238     schwarze 2901:        cp = buf->buf + pos;
1.273     schwarze 2902:        for (i = 0; i < 9; i++) {
                   2903:                if (*cp == '\0')
                   2904:                        arg[i] = "";
                   2905:                else {
                   2906:                        arg[i] = mandoc_getarg(r->parse, &cp, ln, &pos);
                   2907:                        r->argc = i + 1;
                   2908:                }
                   2909:        }
1.99      kristaps 2910:
1.106     kristaps 2911:        /*
                   2912:         * Expand macro arguments.
1.99      kristaps 2913:         */
1.263     schwarze 2914:
                   2915:        buf->sz = strlen(r->current_string) + 1;
1.292     schwarze 2916:        n1 = n2 = cp = mandoc_malloc(buf->sz);
1.263     schwarze 2917:        memcpy(n1, r->current_string, buf->sz);
1.292     schwarze 2918:        expand_count = 0;
1.263     schwarze 2919:        while (*cp != '\0') {
                   2920:
                   2921:                /* Scan ahead for the next argument invocation. */
                   2922:
                   2923:                if (*cp++ != '\\')
                   2924:                        continue;
                   2925:                if (*cp++ != '$')
                   2926:                        continue;
1.274     schwarze 2927:                if (*cp == '*') {  /* \\$* inserts all arguments */
                   2928:                        ib = 0;
                   2929:                        ie = r->argc - 1;
                   2930:                } else {  /* \\$1 .. \\$9 insert one argument */
                   2931:                        ib = ie = *cp - '1';
                   2932:                        if (ib < 0 || ib > 8)
                   2933:                                continue;
                   2934:                }
1.263     schwarze 2935:                cp -= 2;
1.292     schwarze 2936:
                   2937:                /*
                   2938:                 * Prevent infinite recursion.
                   2939:                 */
                   2940:
                   2941:                if (cp >= n2)
                   2942:                        expand_count = 1;
                   2943:                else if (++expand_count > EXPAND_LIMIT) {
                   2944:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
                   2945:                            ln, (int)(cp - n1), NULL);
1.293     schwarze 2946:                        free(buf->buf);
                   2947:                        buf->buf = n1;
1.292     schwarze 2948:                        return ROFF_IGN;
                   2949:                }
1.263     schwarze 2950:
                   2951:                /*
                   2952:                 * Determine the size of the expanded argument,
                   2953:                 * taking escaping of quotes into account.
                   2954:                 */
                   2955:
1.274     schwarze 2956:                asz = ie > ib ? ie - ib : 0;  /* for blanks */
                   2957:                for (i = ib; i <= ie; i++) {
                   2958:                        for (ap = arg[i]; *ap != '\0'; ap++) {
                   2959:                                asz++;
                   2960:                                if (*ap == '"')
                   2961:                                        asz += 3;
                   2962:                        }
1.263     schwarze 2963:                }
                   2964:                if (asz != 3) {
                   2965:
                   2966:                        /*
                   2967:                         * Determine the size of the rest of the
                   2968:                         * unexpanded macro, including the NUL.
                   2969:                         */
                   2970:
                   2971:                        rsz = buf->sz - (cp - n1) - 3;
                   2972:
                   2973:                        /*
                   2974:                         * When shrinking, move before
                   2975:                         * releasing the storage.
                   2976:                         */
                   2977:
                   2978:                        if (asz < 3)
                   2979:                                memmove(cp + asz, cp + 3, rsz);
                   2980:
                   2981:                        /*
                   2982:                         * Resize the storage for the macro
                   2983:                         * and readjust the parse pointer.
                   2984:                         */
                   2985:
                   2986:                        buf->sz += asz - 3;
                   2987:                        n2 = mandoc_realloc(n1, buf->sz);
                   2988:                        cp = n2 + (cp - n1);
                   2989:                        n1 = n2;
                   2990:
                   2991:                        /*
                   2992:                         * When growing, make room
                   2993:                         * for the expanded argument.
                   2994:                         */
                   2995:
                   2996:                        if (asz > 3)
                   2997:                                memmove(cp + asz, cp + 3, rsz);
                   2998:                }
                   2999:
                   3000:                /* Copy the expanded argument, escaping quotes. */
                   3001:
                   3002:                n2 = cp;
1.274     schwarze 3003:                for (i = ib; i <= ie; i++) {
                   3004:                        for (ap = arg[i]; *ap != '\0'; ap++) {
                   3005:                                if (*ap == '"') {
                   3006:                                        memcpy(n2, "\\(dq", 4);
                   3007:                                        n2 += 4;
                   3008:                                } else
                   3009:                                        *n2++ = *ap;
                   3010:                        }
                   3011:                        if (i < ie)
                   3012:                                *n2++ = ' ';
1.106     kristaps 3013:                }
1.99      kristaps 3014:        }
                   3015:
1.106     kristaps 3016:        /*
                   3017:         * Replace the macro invocation
                   3018:         * by the expanded macro.
                   3019:         */
1.263     schwarze 3020:
1.238     schwarze 3021:        free(buf->buf);
                   3022:        buf->buf = n1;
1.248     schwarze 3023:        *offs = 0;
1.106     kristaps 3024:
1.277     schwarze 3025:        return buf->sz > 1 && buf->buf[buf->sz - 2] == '\n' ?
                   3026:           ROFF_REPARSE : ROFF_APPEND;
1.99      kristaps 3027: }
1.121     schwarze 3028:
1.212     schwarze 3029: static size_t
1.121     schwarze 3030: roff_getname(struct roff *r, char **cpp, int ln, int pos)
                   3031: {
                   3032:        char     *name, *cp;
1.212     schwarze 3033:        size_t    namesz;
1.121     schwarze 3034:
                   3035:        name = *cpp;
                   3036:        if ('\0' == *name)
1.277     schwarze 3037:                return 0;
1.121     schwarze 3038:
1.212     schwarze 3039:        /* Read until end of name and terminate it with NUL. */
                   3040:        for (cp = name; 1; cp++) {
                   3041:                if ('\0' == *cp || ' ' == *cp) {
                   3042:                        namesz = cp - name;
                   3043:                        break;
                   3044:                }
1.121     schwarze 3045:                if ('\\' != *cp)
                   3046:                        continue;
1.215     schwarze 3047:                namesz = cp - name;
                   3048:                if ('{' == cp[1] || '}' == cp[1])
                   3049:                        break;
1.121     schwarze 3050:                cp++;
                   3051:                if ('\\' == *cp)
                   3052:                        continue;
1.224     schwarze 3053:                mandoc_vmsg(MANDOCERR_NAMESC, r->parse, ln, pos,
                   3054:                    "%.*s", (int)(cp - name + 1), name);
1.212     schwarze 3055:                mandoc_escape((const char **)&cp, NULL, NULL);
                   3056:                break;
1.121     schwarze 3057:        }
                   3058:
                   3059:        /* Read past spaces. */
                   3060:        while (' ' == *cp)
                   3061:                cp++;
                   3062:
                   3063:        *cpp = cp;
1.277     schwarze 3064:        return namesz;
1.121     schwarze 3065: }
                   3066:
1.106     kristaps 3067: /*
                   3068:  * Store *string into the user-defined string called *name.
                   3069:  * To clear an existing entry, call with (*r, *name, NULL, 0).
1.193     schwarze 3070:  * append == 0: replace mode
                   3071:  * append == 1: single-line append mode
                   3072:  * append == 2: multiline append mode, append '\n' after each call
1.106     kristaps 3073:  */
1.94      kristaps 3074: static void
1.106     kristaps 3075: roff_setstr(struct roff *r, const char *name, const char *string,
1.193     schwarze 3076:        int append)
1.92      schwarze 3077: {
1.164     kristaps 3078:
                   3079:        roff_setstrn(&r->strtab, name, strlen(name), string,
1.207     schwarze 3080:            string ? strlen(string) : 0, append);
1.164     kristaps 3081: }
                   3082:
                   3083: static void
1.166     kristaps 3084: roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
1.193     schwarze 3085:                const char *string, size_t stringsz, int append)
1.164     kristaps 3086: {
1.166     kristaps 3087:        struct roffkv   *n;
1.164     kristaps 3088:        char            *c;
                   3089:        int              i;
                   3090:        size_t           oldch, newch;
1.92      schwarze 3091:
1.106     kristaps 3092:        /* Search for an existing string with the same name. */
1.164     kristaps 3093:        n = *r;
                   3094:
1.211     schwarze 3095:        while (n && (namesz != n->key.sz ||
                   3096:                        strncmp(n->key.p, name, namesz)))
1.92      schwarze 3097:                n = n->next;
1.94      kristaps 3098:
                   3099:        if (NULL == n) {
1.106     kristaps 3100:                /* Create a new string table entry. */
1.166     kristaps 3101:                n = mandoc_malloc(sizeof(struct roffkv));
                   3102:                n->key.p = mandoc_strndup(name, namesz);
                   3103:                n->key.sz = namesz;
                   3104:                n->val.p = NULL;
                   3105:                n->val.sz = 0;
1.164     kristaps 3106:                n->next = *r;
                   3107:                *r = n;
1.193     schwarze 3108:        } else if (0 == append) {
1.166     kristaps 3109:                free(n->val.p);
                   3110:                n->val.p = NULL;
                   3111:                n->val.sz = 0;
1.106     kristaps 3112:        }
                   3113:
                   3114:        if (NULL == string)
                   3115:                return;
                   3116:
                   3117:        /*
                   3118:         * One additional byte for the '\n' in multiline mode,
                   3119:         * and one for the terminating '\0'.
                   3120:         */
1.193     schwarze 3121:        newch = stringsz + (1 < append ? 2u : 1u);
1.164     kristaps 3122:
1.166     kristaps 3123:        if (NULL == n->val.p) {
                   3124:                n->val.p = mandoc_malloc(newch);
                   3125:                *n->val.p = '\0';
1.106     kristaps 3126:                oldch = 0;
                   3127:        } else {
1.166     kristaps 3128:                oldch = n->val.sz;
                   3129:                n->val.p = mandoc_realloc(n->val.p, oldch + newch);
1.106     kristaps 3130:        }
                   3131:
                   3132:        /* Skip existing content in the destination buffer. */
1.166     kristaps 3133:        c = n->val.p + (int)oldch;
1.106     kristaps 3134:
                   3135:        /* Append new content to the destination buffer. */
1.164     kristaps 3136:        i = 0;
                   3137:        while (i < (int)stringsz) {
1.106     kristaps 3138:                /*
                   3139:                 * Rudimentary roff copy mode:
                   3140:                 * Handle escaped backslashes.
                   3141:                 */
1.164     kristaps 3142:                if ('\\' == string[i] && '\\' == string[i + 1])
                   3143:                        i++;
                   3144:                *c++ = string[i++];
1.106     kristaps 3145:        }
1.94      kristaps 3146:
1.106     kristaps 3147:        /* Append terminating bytes. */
1.193     schwarze 3148:        if (1 < append)
1.106     kristaps 3149:                *c++ = '\n';
1.163     kristaps 3150:
1.106     kristaps 3151:        *c = '\0';
1.166     kristaps 3152:        n->val.sz = (int)(c - n->val.p);
1.92      schwarze 3153: }
                   3154:
1.94      kristaps 3155: static const char *
                   3156: roff_getstrn(const struct roff *r, const char *name, size_t len)
1.92      schwarze 3157: {
1.166     kristaps 3158:        const struct roffkv *n;
1.191     schwarze 3159:        int i;
1.92      schwarze 3160:
1.164     kristaps 3161:        for (n = r->strtab; n; n = n->next)
1.207     schwarze 3162:                if (0 == strncmp(name, n->key.p, len) &&
                   3163:                    '\0' == n->key.p[(int)len])
1.277     schwarze 3164:                        return n->val.p;
1.191     schwarze 3165:
                   3166:        for (i = 0; i < PREDEFS_MAX; i++)
                   3167:                if (0 == strncmp(name, predefs[i].name, len) &&
                   3168:                                '\0' == predefs[i].name[(int)len])
1.277     schwarze 3169:                        return predefs[i].str;
1.94      kristaps 3170:
1.277     schwarze 3171:        return NULL;
1.92      schwarze 3172: }
                   3173:
1.94      kristaps 3174: static void
1.167     kristaps 3175: roff_freestr(struct roffkv *r)
1.92      schwarze 3176: {
1.166     kristaps 3177:        struct roffkv    *n, *nn;
1.92      schwarze 3178:
1.167     kristaps 3179:        for (n = r; n; n = nn) {
1.166     kristaps 3180:                free(n->key.p);
                   3181:                free(n->val.p);
1.92      schwarze 3182:                nn = n->next;
                   3183:                free(n);
                   3184:        }
1.114     kristaps 3185: }
1.266     schwarze 3186:
                   3187: /* --- accessors and utility functions ------------------------------------ */
1.114     kristaps 3188:
                   3189: const struct tbl_span *
                   3190: roff_span(const struct roff *r)
                   3191: {
1.207     schwarze 3192:
1.277     schwarze 3193:        return r->tbl ? tbl_span(r->tbl) : NULL;
1.125     kristaps 3194: }
                   3195:
                   3196: const struct eqn *
                   3197: roff_eqn(const struct roff *r)
                   3198: {
1.207     schwarze 3199:
1.277     schwarze 3200:        return r->last_eqn ? &r->last_eqn->eqn : NULL;
1.164     kristaps 3201: }
                   3202:
                   3203: /*
                   3204:  * Duplicate an input string, making the appropriate character
                   3205:  * conversations (as stipulated by `tr') along the way.
                   3206:  * Returns a heap-allocated string with all the replacements made.
                   3207:  */
                   3208: char *
                   3209: roff_strdup(const struct roff *r, const char *p)
                   3210: {
1.166     kristaps 3211:        const struct roffkv *cp;
1.164     kristaps 3212:        char            *res;
                   3213:        const char      *pp;
                   3214:        size_t           ssz, sz;
                   3215:        enum mandoc_esc  esc;
                   3216:
1.167     kristaps 3217:        if (NULL == r->xmbtab && NULL == r->xtab)
1.277     schwarze 3218:                return mandoc_strdup(p);
1.164     kristaps 3219:        else if ('\0' == *p)
1.277     schwarze 3220:                return mandoc_strdup("");
1.164     kristaps 3221:
                   3222:        /*
                   3223:         * Step through each character looking for term matches
                   3224:         * (remember that a `tr' can be invoked with an escape, which is
                   3225:         * a glyph but the escape is multi-character).
                   3226:         * We only do this if the character hash has been initialised
                   3227:         * and the string is >0 length.
                   3228:         */
                   3229:
                   3230:        res = NULL;
                   3231:        ssz = 0;
                   3232:
                   3233:        while ('\0' != *p) {
1.289     schwarze 3234:                assert((unsigned int)*p < 128);
                   3235:                if ('\\' != *p && r->xtab && r->xtab[(unsigned int)*p].p) {
1.167     kristaps 3236:                        sz = r->xtab[(int)*p].sz;
                   3237:                        res = mandoc_realloc(res, ssz + sz + 1);
                   3238:                        memcpy(res + ssz, r->xtab[(int)*p].p, sz);
                   3239:                        ssz += sz;
                   3240:                        p++;
                   3241:                        continue;
                   3242:                } else if ('\\' != *p) {
                   3243:                        res = mandoc_realloc(res, ssz + 2);
                   3244:                        res[ssz++] = *p++;
                   3245:                        continue;
                   3246:                }
                   3247:
1.164     kristaps 3248:                /* Search for term matches. */
1.167     kristaps 3249:                for (cp = r->xmbtab; cp; cp = cp->next)
1.166     kristaps 3250:                        if (0 == strncmp(p, cp->key.p, cp->key.sz))
1.164     kristaps 3251:                                break;
                   3252:
                   3253:                if (NULL != cp) {
                   3254:                        /*
                   3255:                         * A match has been found.
                   3256:                         * Append the match to the array and move
                   3257:                         * forward by its keysize.
                   3258:                         */
1.207     schwarze 3259:                        res = mandoc_realloc(res,
                   3260:                            ssz + cp->val.sz + 1);
1.166     kristaps 3261:                        memcpy(res + ssz, cp->val.p, cp->val.sz);
                   3262:                        ssz += cp->val.sz;
                   3263:                        p += (int)cp->key.sz;
1.164     kristaps 3264:                        continue;
                   3265:                }
                   3266:
1.167     kristaps 3267:                /*
                   3268:                 * Handle escapes carefully: we need to copy
                   3269:                 * over just the escape itself, or else we might
                   3270:                 * do replacements within the escape itself.
                   3271:                 * Make sure to pass along the bogus string.
                   3272:                 */
                   3273:                pp = p++;
                   3274:                esc = mandoc_escape(&p, NULL, NULL);
                   3275:                if (ESCAPE_ERROR == esc) {
                   3276:                        sz = strlen(pp);
1.164     kristaps 3277:                        res = mandoc_realloc(res, ssz + sz + 1);
                   3278:                        memcpy(res + ssz, pp, sz);
1.167     kristaps 3279:                        break;
1.164     kristaps 3280:                }
1.207     schwarze 3281:                /*
                   3282:                 * We bail out on bad escapes.
1.167     kristaps 3283:                 * No need to warn: we already did so when
                   3284:                 * roff_res() was called.
                   3285:                 */
                   3286:                sz = (int)(p - pp);
                   3287:                res = mandoc_realloc(res, ssz + sz + 1);
                   3288:                memcpy(res + ssz, pp, sz);
                   3289:                ssz += sz;
1.164     kristaps 3290:        }
                   3291:
                   3292:        res[(int)ssz] = '\0';
1.277     schwarze 3293:        return res;
1.227     schwarze 3294: }
                   3295:
                   3296: int
                   3297: roff_getformat(const struct roff *r)
                   3298: {
                   3299:
1.277     schwarze 3300:        return r->format;
1.174     kristaps 3301: }
                   3302:
                   3303: /*
1.207     schwarze 3304:  * Find out whether a line is a macro line or not.
1.174     kristaps 3305:  * If it is, adjust the current position and return one; if it isn't,
                   3306:  * return zero and don't change the current position.
                   3307:  * If the control character has been set with `.cc', then let that grain
                   3308:  * precedence.
                   3309:  * This is slighly contrary to groff, where using the non-breaking
                   3310:  * control character when `cc' has been invoked will cause the
                   3311:  * non-breaking macro contents to be printed verbatim.
                   3312:  */
                   3313: int
                   3314: roff_getcontrol(const struct roff *r, const char *cp, int *ppos)
                   3315: {
                   3316:        int             pos;
                   3317:
                   3318:        pos = *ppos;
                   3319:
                   3320:        if (0 != r->control && cp[pos] == r->control)
                   3321:                pos++;
                   3322:        else if (0 != r->control)
1.277     schwarze 3323:                return 0;
1.174     kristaps 3324:        else if ('\\' == cp[pos] && '.' == cp[pos + 1])
                   3325:                pos += 2;
                   3326:        else if ('.' == cp[pos] || '\'' == cp[pos])
                   3327:                pos++;
                   3328:        else
1.277     schwarze 3329:                return 0;
1.174     kristaps 3330:
                   3331:        while (' ' == cp[pos] || '\t' == cp[pos])
                   3332:                pos++;
                   3333:
                   3334:        *ppos = pos;
1.277     schwarze 3335:        return 1;
1.74      kristaps 3336: }

CVSweb