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Annotation of mandoc/roff.c, Revision 1.305

1.305   ! schwarze    1: /*     $Id: roff.c,v 1.304 2017/06/04 22:44:15 schwarze Exp $ */
1.1       kristaps    2: /*
1.267     schwarze    3:  * Copyright (c) 2008-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
1.287     schwarze    4:  * Copyright (c) 2010-2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
1.1       kristaps    5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
1.66      kristaps    7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
1.1       kristaps    9:  *
1.106     kristaps   10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.66      kristaps   11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.106     kristaps   12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.66      kristaps   13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1       kristaps   17:  */
1.66      kristaps   18: #include "config.h"
1.225     schwarze   19:
                     20: #include <sys/types.h>
1.30      kristaps   21:
1.67      kristaps   22: #include <assert.h>
1.85      kristaps   23: #include <ctype.h>
1.245     schwarze   24: #include <limits.h>
1.295     schwarze   25: #include <stddef.h>
                     26: #include <stdint.h>
1.178     schwarze   27: #include <stdio.h>
1.1       kristaps   28: #include <stdlib.h>
1.67      kristaps   29: #include <string.h>
1.1       kristaps   30:
1.67      kristaps   31: #include "mandoc.h"
1.201     schwarze   32: #include "mandoc_aux.h"
1.295     schwarze   33: #include "mandoc_ohash.h"
1.265     schwarze   34: #include "roff.h"
1.226     schwarze   35: #include "libmandoc.h"
1.266     schwarze   36: #include "roff_int.h"
1.109     kristaps   37: #include "libroff.h"
1.82      kristaps   38:
1.170     schwarze   39: /* Maximum number of string expansions per line, to break infinite loops. */
                     40: #define        EXPAND_LIMIT    1000
                     41:
1.266     schwarze   42: /* --- data types --------------------------------------------------------- */
                     43:
1.147     kristaps   44: /*
1.167     kristaps   45:  * An incredibly-simple string buffer.
                     46:  */
1.94      kristaps   47: struct roffstr {
1.167     kristaps   48:        char            *p; /* nil-terminated buffer */
                     49:        size_t           sz; /* saved strlen(p) */
1.166     kristaps   50: };
                     51:
                     52: /*
1.167     kristaps   53:  * A key-value roffstr pair as part of a singly-linked list.
1.166     kristaps   54:  */
                     55: struct roffkv {
                     56:        struct roffstr   key;
                     57:        struct roffstr   val;
                     58:        struct roffkv   *next; /* next in list */
1.94      kristaps   59: };
                     60:
1.180     schwarze   61: /*
                     62:  * A single number register as part of a singly-linked list.
                     63:  */
                     64: struct roffreg {
                     65:        struct roffstr   key;
1.181     schwarze   66:        int              val;
1.180     schwarze   67:        struct roffreg  *next;
                     68: };
                     69:
1.295     schwarze   70: /*
                     71:  * Association of request and macro names with token IDs.
                     72:  */
                     73: struct roffreq {
                     74:        enum roff_tok    tok;
                     75:        char             name[];
                     76: };
                     77:
1.67      kristaps   78: struct roff {
1.128     kristaps   79:        struct mparse   *parse; /* parse point */
1.296     schwarze   80:        struct roff_man *man; /* mdoc or man parser */
1.67      kristaps   81:        struct roffnode *last; /* leaf of stack */
1.223     schwarze   82:        int             *rstack; /* stack of inverted `ie' values */
1.295     schwarze   83:        struct ohash    *reqtab; /* request lookup table */
1.180     schwarze   84:        struct roffreg  *regtab; /* number registers */
1.166     kristaps   85:        struct roffkv   *strtab; /* user-defined strings & macros */
1.167     kristaps   86:        struct roffkv   *xmbtab; /* multi-byte trans table (`tr') */
                     87:        struct roffstr  *xtab; /* single-byte trans table (`tr') */
1.106     kristaps   88:        const char      *current_string; /* value of last called user macro */
1.118     kristaps   89:        struct tbl_node *first_tbl; /* first table parsed */
                     90:        struct tbl_node *last_tbl; /* last table parsed */
                     91:        struct tbl_node *tbl; /* current table being parsed */
1.125     kristaps   92:        struct eqn_node *last_eqn; /* last equation parsed */
                     93:        struct eqn_node *first_eqn; /* first equation parsed */
                     94:        struct eqn_node *eqn; /* current equation being parsed */
1.230     schwarze   95:        int              eqn_inline; /* current equation is inline */
1.223     schwarze   96:        int              options; /* parse options */
                     97:        int              rstacksz; /* current size limit of rstack */
                     98:        int              rstackpos; /* position in rstack */
1.227     schwarze   99:        int              format; /* current file in mdoc or man format */
1.273     schwarze  100:        int              argc; /* number of args of the last macro */
1.223     schwarze  101:        char             control; /* control character */
1.303     schwarze  102:        char             escape; /* escape character */
1.79      kristaps  103: };
                    104:
1.67      kristaps  105: struct roffnode {
1.294     schwarze  106:        enum roff_tok    tok; /* type of node */
1.67      kristaps  107:        struct roffnode *parent; /* up one in stack */
                    108:        int              line; /* parse line */
                    109:        int              col; /* parse col */
1.106     kristaps  110:        char            *name; /* node name, e.g. macro name */
1.79      kristaps  111:        char            *end; /* end-rules: custom token */
                    112:        int              endspan; /* end-rules: next-line or infty */
1.198     schwarze  113:        int              rule; /* current evaluation rule */
1.67      kristaps  114: };
                    115:
                    116: #define        ROFF_ARGS        struct roff *r, /* parse ctx */ \
1.294     schwarze  117:                         enum roff_tok tok, /* tok of macro */ \
1.238     schwarze  118:                         struct buf *buf, /* input buffer */ \
1.67      kristaps  119:                         int ln, /* parse line */ \
1.75      kristaps  120:                         int ppos, /* original pos in buffer */ \
                    121:                         int pos, /* current pos in buffer */ \
1.74      kristaps  122:                         int *offs /* reset offset of buffer data */
1.67      kristaps  123:
                    124: typedef        enum rofferr (*roffproc)(ROFF_ARGS);
                    125:
                    126: struct roffmac {
1.79      kristaps  127:        roffproc         proc; /* process new macro */
                    128:        roffproc         text; /* process as child text of macro */
                    129:        roffproc         sub; /* process as child of macro */
                    130:        int              flags;
                    131: #define        ROFFMAC_STRUCT  (1 << 0) /* always interpret */
1.67      kristaps  132: };
                    133:
1.141     kristaps  134: struct predef {
                    135:        const char      *name; /* predefined input name */
                    136:        const char      *str; /* replacement symbol */
                    137: };
                    138:
                    139: #define        PREDEF(__name, __str) \
                    140:        { (__name), (__str) },
                    141:
1.266     schwarze  142: /* --- function prototypes ------------------------------------------------ */
                    143:
1.155     kristaps  144: static void             roffnode_cleanscope(struct roff *);
                    145: static void             roffnode_pop(struct roff *);
1.294     schwarze  146: static void             roffnode_push(struct roff *, enum roff_tok,
1.155     kristaps  147:                                const char *, int, int);
1.80      kristaps  148: static enum rofferr     roff_block(ROFF_ARGS);
                    149: static enum rofferr     roff_block_text(ROFF_ARGS);
                    150: static enum rofferr     roff_block_sub(ROFF_ARGS);
1.296     schwarze  151: static enum rofferr     roff_br(ROFF_ARGS);
1.80      kristaps  152: static enum rofferr     roff_cblock(ROFF_ARGS);
1.174     kristaps  153: static enum rofferr     roff_cc(ROFF_ARGS);
1.195     schwarze  154: static void             roff_ccond(struct roff *, int, int);
1.82      kristaps  155: static enum rofferr     roff_cond(ROFF_ARGS);
                    156: static enum rofferr     roff_cond_text(ROFF_ARGS);
                    157: static enum rofferr     roff_cond_sub(ROFF_ARGS);
1.92      schwarze  158: static enum rofferr     roff_ds(ROFF_ARGS);
1.303     schwarze  159: static enum rofferr     roff_ec(ROFF_ARGS);
                    160: static enum rofferr     roff_eo(ROFF_ARGS);
1.238     schwarze  161: static enum rofferr     roff_eqndelim(struct roff *, struct buf *, int);
1.271     schwarze  162: static int              roff_evalcond(struct roff *r, int, char *, int *);
1.234     kristaps  163: static int              roff_evalnum(struct roff *, int,
                    164:                                const char *, int *, int *, int);
                    165: static int              roff_evalpar(struct roff *, int,
1.261     schwarze  166:                                const char *, int *, int *, int);
1.198     schwarze  167: static int              roff_evalstrcond(const char *, int *);
1.155     kristaps  168: static void             roff_free1(struct roff *);
1.180     schwarze  169: static void             roff_freereg(struct roffreg *);
1.167     kristaps  170: static void             roff_freestr(struct roffkv *);
1.212     schwarze  171: static size_t           roff_getname(struct roff *, char **, int, int);
1.261     schwarze  172: static int              roff_getnum(const char *, int *, int *, int);
1.184     schwarze  173: static int              roff_getop(const char *, int *, char *);
1.181     schwarze  174: static int              roff_getregn(const struct roff *,
                    175:                                const char *, size_t);
1.273     schwarze  176: static int              roff_getregro(const struct roff *,
                    177:                                const char *name);
1.207     schwarze  178: static const char      *roff_getstrn(const struct roff *,
1.94      kristaps  179:                                const char *, size_t);
1.271     schwarze  180: static int              roff_hasregn(const struct roff *,
                    181:                                const char *, size_t);
1.251     schwarze  182: static enum rofferr     roff_insec(ROFF_ARGS);
1.178     schwarze  183: static enum rofferr     roff_it(ROFF_ARGS);
1.103     kristaps  184: static enum rofferr     roff_line_ignore(ROFF_ARGS);
1.265     schwarze  185: static void             roff_man_alloc1(struct roff_man *);
                    186: static void             roff_man_free1(struct roff_man *);
1.300     schwarze  187: static enum rofferr     roff_manyarg(ROFF_ARGS);
1.89      kristaps  188: static enum rofferr     roff_nr(ROFF_ARGS);
1.297     schwarze  189: static enum rofferr     roff_onearg(ROFF_ARGS);
1.294     schwarze  190: static enum roff_tok    roff_parse(struct roff *, char *, int *,
1.214     schwarze  191:                                int, int);
1.305   ! schwarze  192: static enum rofferr     roff_parsetext(struct roff *, struct buf *,
        !           193:                                int, int *);
1.238     schwarze  194: static enum rofferr     roff_res(struct roff *, struct buf *, int, int);
1.122     schwarze  195: static enum rofferr     roff_rm(ROFF_ARGS);
1.203     schwarze  196: static enum rofferr     roff_rr(ROFF_ARGS);
1.94      kristaps  197: static void             roff_setstr(struct roff *,
1.106     kristaps  198:                                const char *, const char *, int);
1.207     schwarze  199: static void             roff_setstrn(struct roffkv **, const char *,
1.164     kristaps  200:                                size_t, const char *, size_t, int);
1.105     kristaps  201: static enum rofferr     roff_so(ROFF_ARGS);
1.164     kristaps  202: static enum rofferr     roff_tr(ROFF_ARGS);
1.175     schwarze  203: static enum rofferr     roff_Dd(ROFF_ARGS);
                    204: static enum rofferr     roff_TH(ROFF_ARGS);
1.109     kristaps  205: static enum rofferr     roff_TE(ROFF_ARGS);
                    206: static enum rofferr     roff_TS(ROFF_ARGS);
1.125     kristaps  207: static enum rofferr     roff_EQ(ROFF_ARGS);
                    208: static enum rofferr     roff_EN(ROFF_ARGS);
1.112     kristaps  209: static enum rofferr     roff_T_(ROFF_ARGS);
1.251     schwarze  210: static enum rofferr     roff_unsupp(ROFF_ARGS);
1.106     kristaps  211: static enum rofferr     roff_userdef(ROFF_ARGS);
1.67      kristaps  212:
1.266     schwarze  213: /* --- constant data ------------------------------------------------------ */
                    214:
1.261     schwarze  215: #define        ROFFNUM_SCALE   (1 << 0)  /* Honour scaling in roff_getnum(). */
                    216: #define        ROFFNUM_WHITE   (1 << 1)  /* Skip whitespace in roff_evalnum(). */
                    217:
1.294     schwarze  218: const char *__roff_name[MAN_MAX + 1] = {
1.305   ! schwarze  219:        "br",           "ce",           "ft",           "ll",
        !           220:        "mc",           "sp",           "ta",           "ti",
        !           221:        NULL,
1.294     schwarze  222:        "ab",           "ad",           "af",           "aln",
                    223:        "als",          "am",           "am1",          "ami",
                    224:        "ami1",         "as",           "as1",          "asciify",
                    225:        "backtrace",    "bd",           "bleedat",      "blm",
                    226:         "box",         "boxa",         "bp",           "BP",
                    227:        "break",        "breakchar",    "brnl",         "brp",
1.305   ! schwarze  228:        "brpnl",        "c2",           "cc",
1.294     schwarze  229:        "cf",           "cflags",       "ch",           "char",
                    230:        "chop",         "class",        "close",        "CL",
                    231:        "color",        "composite",    "continue",     "cp",
                    232:        "cropat",       "cs",           "cu",           "da",
                    233:        "dch",          "Dd",           "de",           "de1",
                    234:        "defcolor",     "dei",          "dei1",         "device",
                    235:        "devicem",      "di",           "do",           "ds",
                    236:        "ds1",          "dwh",          "dt",           "ec",
                    237:        "ecr",          "ecs",          "el",           "em",
                    238:        "EN",           "eo",           "EP",           "EQ",
                    239:        "errprint",     "ev",           "evc",          "ex",
                    240:        "fallback",     "fam",          "fc",           "fchar",
                    241:        "fcolor",       "fdeferlig",    "feature",      "fkern",
                    242:        "fl",           "flig",         "fp",           "fps",
                    243:        "fschar",       "fspacewidth",  "fspecial",     "ftr",
                    244:        "fzoom",        "gcolor",       "hc",           "hcode",
                    245:        "hidechar",     "hla",          "hlm",          "hpf",
                    246:        "hpfa",         "hpfcode",      "hw",           "hy",
                    247:        "hylang",       "hylen",        "hym",          "hypp",
                    248:        "hys",          "ie",           "if",           "ig",
                    249:        "index",        "it",           "itc",          "IX",
                    250:        "kern",         "kernafter",    "kernbefore",   "kernpair",
                    251:        "lc",           "lc_ctype",     "lds",          "length",
                    252:        "letadj",       "lf",           "lg",           "lhang",
                    253:        "linetabs",     "lnr",          "lnrf",         "lpfx",
1.304     schwarze  254:        "ls",           "lsm",          "lt",
1.294     schwarze  255:        "mediasize",    "minss",        "mk",           "mso",
                    256:        "na",           "ne",           "nh",           "nhychar",
                    257:        "nm",           "nn",           "nop",          "nr",
                    258:        "nrf",          "nroff",        "ns",           "nx",
                    259:        "open",         "opena",        "os",           "output",
                    260:        "padj",         "papersize",    "pc",           "pev",
                    261:        "pi",           "PI",           "pl",           "pm",
                    262:        "pn",           "pnr",          "po",           "ps",
                    263:        "psbb",         "pshape",       "pso",          "ptr",
                    264:        "pvs",          "rchar",        "rd",           "recursionlimit",
                    265:        "return",       "rfschar",      "rhang",        "rj",
                    266:        "rm",           "rn",           "rnn",          "rr",
                    267:        "rs",           "rt",           "schar",        "sentchar",
                    268:        "shc",          "shift",        "sizes",        "so",
                    269:        "spacewidth",   "special",      "spreadwarn",   "ss",
                    270:        "sty",          "substring",    "sv",           "sy",
1.300     schwarze  271:        "T&",           "tc",           "TE",
1.301     schwarze  272:        "TH",           "tkf",          "tl",
1.294     schwarze  273:        "tm",           "tm1",          "tmc",          "tr",
                    274:        "track",        "transchar",    "trf",          "trimat",
                    275:        "trin",         "trnt",         "troff",        "TS",
                    276:        "uf",           "ul",           "unformat",     "unwatch",
                    277:        "unwatchn",     "vpt",          "vs",           "warn",
                    278:        "warnscale",    "watch",        "watchlength",  "watchn",
                    279:        "wh",           "while",        "write",        "writec",
                    280:        "writem",       "xflag",        ".",            NULL,
                    281:        "text",
                    282:        "Dd",           "Dt",           "Os",           "Sh",
                    283:        "Ss",           "Pp",           "D1",           "Dl",
                    284:        "Bd",           "Ed",           "Bl",           "El",
                    285:        "It",           "Ad",           "An",           "Ap",
                    286:        "Ar",           "Cd",           "Cm",           "Dv",
                    287:        "Er",           "Ev",           "Ex",           "Fa",
                    288:        "Fd",           "Fl",           "Fn",           "Ft",
                    289:        "Ic",           "In",           "Li",           "Nd",
                    290:        "Nm",           "Op",           "Ot",           "Pa",
                    291:        "Rv",           "St",           "Va",           "Vt",
                    292:        "Xr",           "%A",           "%B",           "%D",
                    293:        "%I",           "%J",           "%N",           "%O",
                    294:        "%P",           "%R",           "%T",           "%V",
                    295:        "Ac",           "Ao",           "Aq",           "At",
                    296:        "Bc",           "Bf",           "Bo",           "Bq",
                    297:        "Bsx",          "Bx",           "Db",           "Dc",
                    298:        "Do",           "Dq",           "Ec",           "Ef",
                    299:        "Em",           "Eo",           "Fx",           "Ms",
                    300:        "No",           "Ns",           "Nx",           "Ox",
                    301:        "Pc",           "Pf",           "Po",           "Pq",
                    302:        "Qc",           "Ql",           "Qo",           "Qq",
                    303:        "Re",           "Rs",           "Sc",           "So",
                    304:        "Sq",           "Sm",           "Sx",           "Sy",
                    305:        "Tn",           "Ux",           "Xc",           "Xo",
                    306:        "Fo",           "Fc",           "Oo",           "Oc",
                    307:        "Bk",           "Ek",           "Bt",           "Hf",
                    308:        "Fr",           "Ud",           "Lb",           "Lp",
                    309:        "Lk",           "Mt",           "Brq",          "Bro",
                    310:        "Brc",          "%C",           "Es",           "En",
1.299     schwarze  311:        "Dx",           "%Q",           "%U",           "Ta",
                    312:        NULL,
1.294     schwarze  313:        "TH",           "SH",           "SS",           "TP",
                    314:        "LP",           "PP",           "P",            "IP",
                    315:        "HP",           "SM",           "SB",           "BI",
                    316:        "IB",           "BR",           "RB",           "R",
                    317:        "B",            "I",            "IR",           "RI",
1.299     schwarze  318:        "nf",           "fi",
1.294     schwarze  319:        "RE",           "RS",           "DT",           "UC",
1.297     schwarze  320:        "PD",           "AT",           "in",
1.294     schwarze  321:        "OP",           "EX",           "EE",           "UR",
1.298     schwarze  322:        "UE",           NULL
1.294     schwarze  323: };
                    324: const  char *const *roff_name = __roff_name;
                    325:
                    326: static struct roffmac   roffs[TOKEN_NONE] = {
1.296     schwarze  327:        { roff_br, NULL, NULL, 0 },  /* br */
1.305   ! schwarze  328:        { roff_onearg, NULL, NULL, 0 },  /* ce */
1.297     schwarze  329:        { roff_onearg, NULL, NULL, 0 },  /* ft */
1.298     schwarze  330:        { roff_onearg, NULL, NULL, 0 },  /* ll */
1.304     schwarze  331:        { roff_onearg, NULL, NULL, 0 },  /* mc */
1.299     schwarze  332:        { roff_onearg, NULL, NULL, 0 },  /* sp */
1.300     schwarze  333:        { roff_manyarg, NULL, NULL, 0 },  /* ta */
1.301     schwarze  334:        { roff_onearg, NULL, NULL, 0 },  /* ti */
1.296     schwarze  335:        { NULL, NULL, NULL, 0 },  /* ROFF_MAX */
1.295     schwarze  336:        { roff_unsupp, NULL, NULL, 0 },  /* ab */
                    337:        { roff_line_ignore, NULL, NULL, 0 },  /* ad */
                    338:        { roff_line_ignore, NULL, NULL, 0 },  /* af */
                    339:        { roff_unsupp, NULL, NULL, 0 },  /* aln */
                    340:        { roff_unsupp, NULL, NULL, 0 },  /* als */
                    341:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* am */
                    342:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* am1 */
                    343:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* ami */
                    344:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* ami1 */
                    345:        { roff_ds, NULL, NULL, 0 },  /* as */
                    346:        { roff_ds, NULL, NULL, 0 },  /* as1 */
                    347:        { roff_unsupp, NULL, NULL, 0 },  /* asciify */
                    348:        { roff_line_ignore, NULL, NULL, 0 },  /* backtrace */
                    349:        { roff_line_ignore, NULL, NULL, 0 },  /* bd */
                    350:        { roff_line_ignore, NULL, NULL, 0 },  /* bleedat */
                    351:        { roff_unsupp, NULL, NULL, 0 },  /* blm */
                    352:        { roff_unsupp, NULL, NULL, 0 },  /* box */
                    353:        { roff_unsupp, NULL, NULL, 0 },  /* boxa */
                    354:        { roff_line_ignore, NULL, NULL, 0 },  /* bp */
                    355:        { roff_unsupp, NULL, NULL, 0 },  /* BP */
                    356:        { roff_unsupp, NULL, NULL, 0 },  /* break */
                    357:        { roff_line_ignore, NULL, NULL, 0 },  /* breakchar */
                    358:        { roff_line_ignore, NULL, NULL, 0 },  /* brnl */
1.296     schwarze  359:        { roff_br, NULL, NULL, 0 },  /* brp */
1.295     schwarze  360:        { roff_line_ignore, NULL, NULL, 0 },  /* brpnl */
                    361:        { roff_unsupp, NULL, NULL, 0 },  /* c2 */
                    362:        { roff_cc, NULL, NULL, 0 },  /* cc */
                    363:        { roff_insec, NULL, NULL, 0 },  /* cf */
                    364:        { roff_line_ignore, NULL, NULL, 0 },  /* cflags */
                    365:        { roff_line_ignore, NULL, NULL, 0 },  /* ch */
                    366:        { roff_unsupp, NULL, NULL, 0 },  /* char */
                    367:        { roff_unsupp, NULL, NULL, 0 },  /* chop */
                    368:        { roff_line_ignore, NULL, NULL, 0 },  /* class */
                    369:        { roff_insec, NULL, NULL, 0 },  /* close */
                    370:        { roff_unsupp, NULL, NULL, 0 },  /* CL */
                    371:        { roff_line_ignore, NULL, NULL, 0 },  /* color */
                    372:        { roff_unsupp, NULL, NULL, 0 },  /* composite */
                    373:        { roff_unsupp, NULL, NULL, 0 },  /* continue */
                    374:        { roff_line_ignore, NULL, NULL, 0 },  /* cp */
                    375:        { roff_line_ignore, NULL, NULL, 0 },  /* cropat */
                    376:        { roff_line_ignore, NULL, NULL, 0 },  /* cs */
                    377:        { roff_line_ignore, NULL, NULL, 0 },  /* cu */
                    378:        { roff_unsupp, NULL, NULL, 0 },  /* da */
                    379:        { roff_unsupp, NULL, NULL, 0 },  /* dch */
                    380:        { roff_Dd, NULL, NULL, 0 },  /* Dd */
                    381:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* de */
                    382:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* de1 */
                    383:        { roff_line_ignore, NULL, NULL, 0 },  /* defcolor */
                    384:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* dei */
                    385:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* dei1 */
                    386:        { roff_unsupp, NULL, NULL, 0 },  /* device */
                    387:        { roff_unsupp, NULL, NULL, 0 },  /* devicem */
                    388:        { roff_unsupp, NULL, NULL, 0 },  /* di */
                    389:        { roff_unsupp, NULL, NULL, 0 },  /* do */
                    390:        { roff_ds, NULL, NULL, 0 },  /* ds */
                    391:        { roff_ds, NULL, NULL, 0 },  /* ds1 */
                    392:        { roff_unsupp, NULL, NULL, 0 },  /* dwh */
                    393:        { roff_unsupp, NULL, NULL, 0 },  /* dt */
1.303     schwarze  394:        { roff_ec, NULL, NULL, 0 },  /* ec */
1.295     schwarze  395:        { roff_unsupp, NULL, NULL, 0 },  /* ecr */
                    396:        { roff_unsupp, NULL, NULL, 0 },  /* ecs */
                    397:        { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT },  /* el */
                    398:        { roff_unsupp, NULL, NULL, 0 },  /* em */
                    399:        { roff_EN, NULL, NULL, 0 },  /* EN */
1.303     schwarze  400:        { roff_eo, NULL, NULL, 0 },  /* eo */
1.295     schwarze  401:        { roff_unsupp, NULL, NULL, 0 },  /* EP */
                    402:        { roff_EQ, NULL, NULL, 0 },  /* EQ */
                    403:        { roff_line_ignore, NULL, NULL, 0 },  /* errprint */
                    404:        { roff_unsupp, NULL, NULL, 0 },  /* ev */
                    405:        { roff_unsupp, NULL, NULL, 0 },  /* evc */
                    406:        { roff_unsupp, NULL, NULL, 0 },  /* ex */
                    407:        { roff_line_ignore, NULL, NULL, 0 },  /* fallback */
                    408:        { roff_line_ignore, NULL, NULL, 0 },  /* fam */
                    409:        { roff_unsupp, NULL, NULL, 0 },  /* fc */
                    410:        { roff_unsupp, NULL, NULL, 0 },  /* fchar */
                    411:        { roff_line_ignore, NULL, NULL, 0 },  /* fcolor */
                    412:        { roff_line_ignore, NULL, NULL, 0 },  /* fdeferlig */
                    413:        { roff_line_ignore, NULL, NULL, 0 },  /* feature */
                    414:        { roff_line_ignore, NULL, NULL, 0 },  /* fkern */
                    415:        { roff_line_ignore, NULL, NULL, 0 },  /* fl */
                    416:        { roff_line_ignore, NULL, NULL, 0 },  /* flig */
                    417:        { roff_line_ignore, NULL, NULL, 0 },  /* fp */
                    418:        { roff_line_ignore, NULL, NULL, 0 },  /* fps */
                    419:        { roff_unsupp, NULL, NULL, 0 },  /* fschar */
                    420:        { roff_line_ignore, NULL, NULL, 0 },  /* fspacewidth */
                    421:        { roff_line_ignore, NULL, NULL, 0 },  /* fspecial */
                    422:        { roff_line_ignore, NULL, NULL, 0 },  /* ftr */
                    423:        { roff_line_ignore, NULL, NULL, 0 },  /* fzoom */
                    424:        { roff_line_ignore, NULL, NULL, 0 },  /* gcolor */
                    425:        { roff_line_ignore, NULL, NULL, 0 },  /* hc */
                    426:        { roff_line_ignore, NULL, NULL, 0 },  /* hcode */
                    427:        { roff_line_ignore, NULL, NULL, 0 },  /* hidechar */
                    428:        { roff_line_ignore, NULL, NULL, 0 },  /* hla */
                    429:        { roff_line_ignore, NULL, NULL, 0 },  /* hlm */
                    430:        { roff_line_ignore, NULL, NULL, 0 },  /* hpf */
                    431:        { roff_line_ignore, NULL, NULL, 0 },  /* hpfa */
                    432:        { roff_line_ignore, NULL, NULL, 0 },  /* hpfcode */
                    433:        { roff_line_ignore, NULL, NULL, 0 },  /* hw */
                    434:        { roff_line_ignore, NULL, NULL, 0 },  /* hy */
                    435:        { roff_line_ignore, NULL, NULL, 0 },  /* hylang */
                    436:        { roff_line_ignore, NULL, NULL, 0 },  /* hylen */
                    437:        { roff_line_ignore, NULL, NULL, 0 },  /* hym */
                    438:        { roff_line_ignore, NULL, NULL, 0 },  /* hypp */
                    439:        { roff_line_ignore, NULL, NULL, 0 },  /* hys */
                    440:        { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT },  /* ie */
                    441:        { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT },  /* if */
                    442:        { roff_block, roff_block_text, roff_block_sub, 0 },  /* ig */
                    443:        { roff_unsupp, NULL, NULL, 0 },  /* index */
                    444:        { roff_it, NULL, NULL, 0 },  /* it */
                    445:        { roff_unsupp, NULL, NULL, 0 },  /* itc */
                    446:        { roff_line_ignore, NULL, NULL, 0 },  /* IX */
                    447:        { roff_line_ignore, NULL, NULL, 0 },  /* kern */
                    448:        { roff_line_ignore, NULL, NULL, 0 },  /* kernafter */
                    449:        { roff_line_ignore, NULL, NULL, 0 },  /* kernbefore */
                    450:        { roff_line_ignore, NULL, NULL, 0 },  /* kernpair */
                    451:        { roff_unsupp, NULL, NULL, 0 },  /* lc */
                    452:        { roff_unsupp, NULL, NULL, 0 },  /* lc_ctype */
                    453:        { roff_unsupp, NULL, NULL, 0 },  /* lds */
                    454:        { roff_unsupp, NULL, NULL, 0 },  /* length */
                    455:        { roff_line_ignore, NULL, NULL, 0 },  /* letadj */
                    456:        { roff_insec, NULL, NULL, 0 },  /* lf */
                    457:        { roff_line_ignore, NULL, NULL, 0 },  /* lg */
                    458:        { roff_line_ignore, NULL, NULL, 0 },  /* lhang */
                    459:        { roff_unsupp, NULL, NULL, 0 },  /* linetabs */
                    460:        { roff_unsupp, NULL, NULL, 0 },  /* lnr */
                    461:        { roff_unsupp, NULL, NULL, 0 },  /* lnrf */
                    462:        { roff_unsupp, NULL, NULL, 0 },  /* lpfx */
                    463:        { roff_line_ignore, NULL, NULL, 0 },  /* ls */
                    464:        { roff_unsupp, NULL, NULL, 0 },  /* lsm */
                    465:        { roff_line_ignore, NULL, NULL, 0 },  /* lt */
                    466:        { roff_line_ignore, NULL, NULL, 0 },  /* mediasize */
                    467:        { roff_line_ignore, NULL, NULL, 0 },  /* minss */
                    468:        { roff_line_ignore, NULL, NULL, 0 },  /* mk */
                    469:        { roff_insec, NULL, NULL, 0 },  /* mso */
                    470:        { roff_line_ignore, NULL, NULL, 0 },  /* na */
                    471:        { roff_line_ignore, NULL, NULL, 0 },  /* ne */
                    472:        { roff_line_ignore, NULL, NULL, 0 },  /* nh */
                    473:        { roff_line_ignore, NULL, NULL, 0 },  /* nhychar */
                    474:        { roff_unsupp, NULL, NULL, 0 },  /* nm */
                    475:        { roff_unsupp, NULL, NULL, 0 },  /* nn */
                    476:        { roff_unsupp, NULL, NULL, 0 },  /* nop */
                    477:        { roff_nr, NULL, NULL, 0 },  /* nr */
                    478:        { roff_unsupp, NULL, NULL, 0 },  /* nrf */
                    479:        { roff_line_ignore, NULL, NULL, 0 },  /* nroff */
                    480:        { roff_line_ignore, NULL, NULL, 0 },  /* ns */
                    481:        { roff_insec, NULL, NULL, 0 },  /* nx */
                    482:        { roff_insec, NULL, NULL, 0 },  /* open */
                    483:        { roff_insec, NULL, NULL, 0 },  /* opena */
                    484:        { roff_line_ignore, NULL, NULL, 0 },  /* os */
                    485:        { roff_unsupp, NULL, NULL, 0 },  /* output */
                    486:        { roff_line_ignore, NULL, NULL, 0 },  /* padj */
                    487:        { roff_line_ignore, NULL, NULL, 0 },  /* papersize */
                    488:        { roff_line_ignore, NULL, NULL, 0 },  /* pc */
                    489:        { roff_line_ignore, NULL, NULL, 0 },  /* pev */
                    490:        { roff_insec, NULL, NULL, 0 },  /* pi */
                    491:        { roff_unsupp, NULL, NULL, 0 },  /* PI */
                    492:        { roff_line_ignore, NULL, NULL, 0 },  /* pl */
                    493:        { roff_line_ignore, NULL, NULL, 0 },  /* pm */
                    494:        { roff_line_ignore, NULL, NULL, 0 },  /* pn */
                    495:        { roff_line_ignore, NULL, NULL, 0 },  /* pnr */
                    496:        { roff_line_ignore, NULL, NULL, 0 },  /* po */
                    497:        { roff_line_ignore, NULL, NULL, 0 },  /* ps */
                    498:        { roff_unsupp, NULL, NULL, 0 },  /* psbb */
                    499:        { roff_unsupp, NULL, NULL, 0 },  /* pshape */
                    500:        { roff_insec, NULL, NULL, 0 },  /* pso */
                    501:        { roff_line_ignore, NULL, NULL, 0 },  /* ptr */
                    502:        { roff_line_ignore, NULL, NULL, 0 },  /* pvs */
                    503:        { roff_unsupp, NULL, NULL, 0 },  /* rchar */
                    504:        { roff_line_ignore, NULL, NULL, 0 },  /* rd */
                    505:        { roff_line_ignore, NULL, NULL, 0 },  /* recursionlimit */
                    506:        { roff_unsupp, NULL, NULL, 0 },  /* return */
                    507:        { roff_unsupp, NULL, NULL, 0 },  /* rfschar */
                    508:        { roff_line_ignore, NULL, NULL, 0 },  /* rhang */
                    509:        { roff_line_ignore, NULL, NULL, 0 },  /* rj */
                    510:        { roff_rm, NULL, NULL, 0 },  /* rm */
                    511:        { roff_unsupp, NULL, NULL, 0 },  /* rn */
                    512:        { roff_unsupp, NULL, NULL, 0 },  /* rnn */
                    513:        { roff_rr, NULL, NULL, 0 },  /* rr */
                    514:        { roff_line_ignore, NULL, NULL, 0 },  /* rs */
                    515:        { roff_line_ignore, NULL, NULL, 0 },  /* rt */
                    516:        { roff_unsupp, NULL, NULL, 0 },  /* schar */
                    517:        { roff_line_ignore, NULL, NULL, 0 },  /* sentchar */
                    518:        { roff_line_ignore, NULL, NULL, 0 },  /* shc */
                    519:        { roff_unsupp, NULL, NULL, 0 },  /* shift */
                    520:        { roff_line_ignore, NULL, NULL, 0 },  /* sizes */
                    521:        { roff_so, NULL, NULL, 0 },  /* so */
                    522:        { roff_line_ignore, NULL, NULL, 0 },  /* spacewidth */
                    523:        { roff_line_ignore, NULL, NULL, 0 },  /* special */
                    524:        { roff_line_ignore, NULL, NULL, 0 },  /* spreadwarn */
                    525:        { roff_line_ignore, NULL, NULL, 0 },  /* ss */
                    526:        { roff_line_ignore, NULL, NULL, 0 },  /* sty */
                    527:        { roff_unsupp, NULL, NULL, 0 },  /* substring */
                    528:        { roff_line_ignore, NULL, NULL, 0 },  /* sv */
                    529:        { roff_insec, NULL, NULL, 0 },  /* sy */
                    530:        { roff_T_, NULL, NULL, 0 },  /* T& */
                    531:        { roff_unsupp, NULL, NULL, 0 },  /* tc */
                    532:        { roff_TE, NULL, NULL, 0 },  /* TE */
                    533:        { roff_TH, NULL, NULL, 0 },  /* TH */
                    534:        { roff_line_ignore, NULL, NULL, 0 },  /* tkf */
                    535:        { roff_unsupp, NULL, NULL, 0 },  /* tl */
                    536:        { roff_line_ignore, NULL, NULL, 0 },  /* tm */
                    537:        { roff_line_ignore, NULL, NULL, 0 },  /* tm1 */
                    538:        { roff_line_ignore, NULL, NULL, 0 },  /* tmc */
                    539:        { roff_tr, NULL, NULL, 0 },  /* tr */
                    540:        { roff_line_ignore, NULL, NULL, 0 },  /* track */
                    541:        { roff_line_ignore, NULL, NULL, 0 },  /* transchar */
                    542:        { roff_insec, NULL, NULL, 0 },  /* trf */
                    543:        { roff_line_ignore, NULL, NULL, 0 },  /* trimat */
                    544:        { roff_unsupp, NULL, NULL, 0 },  /* trin */
                    545:        { roff_unsupp, NULL, NULL, 0 },  /* trnt */
                    546:        { roff_line_ignore, NULL, NULL, 0 },  /* troff */
                    547:        { roff_TS, NULL, NULL, 0 },  /* TS */
                    548:        { roff_line_ignore, NULL, NULL, 0 },  /* uf */
                    549:        { roff_line_ignore, NULL, NULL, 0 },  /* ul */
                    550:        { roff_unsupp, NULL, NULL, 0 },  /* unformat */
                    551:        { roff_line_ignore, NULL, NULL, 0 },  /* unwatch */
                    552:        { roff_line_ignore, NULL, NULL, 0 },  /* unwatchn */
                    553:        { roff_line_ignore, NULL, NULL, 0 },  /* vpt */
                    554:        { roff_line_ignore, NULL, NULL, 0 },  /* vs */
                    555:        { roff_line_ignore, NULL, NULL, 0 },  /* warn */
                    556:        { roff_line_ignore, NULL, NULL, 0 },  /* warnscale */
                    557:        { roff_line_ignore, NULL, NULL, 0 },  /* watch */
                    558:        { roff_line_ignore, NULL, NULL, 0 },  /* watchlength */
                    559:        { roff_line_ignore, NULL, NULL, 0 },  /* watchn */
                    560:        { roff_unsupp, NULL, NULL, 0 },  /* wh */
                    561:        { roff_unsupp, NULL, NULL, 0 },  /* while */
                    562:        { roff_insec, NULL, NULL, 0 },  /* write */
                    563:        { roff_insec, NULL, NULL, 0 },  /* writec */
                    564:        { roff_insec, NULL, NULL, 0 },  /* writem */
                    565:        { roff_line_ignore, NULL, NULL, 0 },  /* xflag */
                    566:        { roff_cblock, NULL, NULL, 0 },  /* . */
                    567:        { roff_userdef, NULL, NULL, 0 }
1.67      kristaps  568: };
                    569:
1.200     schwarze  570: /* not currently implemented: Ds em Eq LP Me PP pp Or Rd Sf SH */
1.175     schwarze  571: const  char *const __mdoc_reserved[] = {
                    572:        "Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At",
                    573:        "Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq",
                    574:        "Brc", "Bro", "Brq", "Bsx", "Bt", "Bx",
                    575:        "Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq",
1.200     schwarze  576:        "Dt", "Dv", "Dx", "D1",
                    577:        "Ec", "Ed", "Ef", "Ek", "El", "Em",
                    578:        "En", "Eo", "Er", "Es", "Ev", "Ex",
1.175     schwarze  579:        "Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",
1.200     schwarze  580:        "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp",
                    581:        "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
1.175     schwarze  582:        "Oc", "Oo", "Op", "Os", "Ot", "Ox",
1.200     schwarze  583:        "Pa", "Pc", "Pf", "Po", "Pp", "Pq",
                    584:        "Qc", "Ql", "Qo", "Qq", "Re", "Rs", "Rv",
                    585:        "Sc", "Sh", "Sm", "So", "Sq",
1.175     schwarze  586:        "Ss", "St", "Sx", "Sy",
                    587:        "Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",
1.200     schwarze  588:        "%A", "%B", "%C", "%D", "%I", "%J", "%N", "%O",
1.175     schwarze  589:        "%P", "%Q", "%R", "%T", "%U", "%V",
                    590:        NULL
                    591: };
                    592:
1.200     schwarze  593: /* not currently implemented: BT DE DS ME MT PT SY TQ YS */
1.175     schwarze  594: const  char *const __man_reserved[] = {
1.200     schwarze  595:        "AT", "B", "BI", "BR", "DT",
                    596:        "EE", "EN", "EQ", "EX", "HP", "I", "IB", "IP", "IR",
                    597:        "LP", "OP", "P", "PD", "PP",
                    598:        "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS",
                    599:        "TE", "TH", "TP", "TS", "T&", "UC", "UE", "UR",
1.175     schwarze  600:        NULL
                    601: };
                    602:
1.141     kristaps  603: /* Array of injected predefined strings. */
                    604: #define        PREDEFS_MAX      38
                    605: static const struct predef predefs[PREDEFS_MAX] = {
                    606: #include "predefs.in"
                    607: };
                    608:
1.305   ! schwarze  609: static int      roffce_lines;  /* number of input lines to center */
        !           610: static struct roff_node *roffce_node;  /* active request */
1.178     schwarze  611: static int      roffit_lines;  /* number of lines to delay */
                    612: static char    *roffit_macro;  /* nil-terminated macro line */
                    613:
1.207     schwarze  614:
1.266     schwarze  615: /* --- request table ------------------------------------------------------ */
                    616:
1.295     schwarze  617: struct ohash *
                    618: roffhash_alloc(enum roff_tok mintok, enum roff_tok maxtok)
1.85      kristaps  619: {
1.295     schwarze  620:        struct ohash    *htab;
                    621:        struct roffreq  *req;
                    622:        enum roff_tok    tok;
                    623:        size_t           sz;
                    624:        unsigned int     slot;
1.85      kristaps  625:
1.295     schwarze  626:        htab = mandoc_malloc(sizeof(*htab));
                    627:        mandoc_ohash_init(htab, 8, offsetof(struct roffreq, name));
1.85      kristaps  628:
1.295     schwarze  629:        for (tok = mintok; tok < maxtok; tok++) {
1.296     schwarze  630:                if (roff_name[tok] == NULL)
                    631:                        continue;
1.295     schwarze  632:                sz = strlen(roff_name[tok]);
                    633:                req = mandoc_malloc(sizeof(*req) + sz + 1);
                    634:                req->tok = tok;
                    635:                memcpy(req->name, roff_name[tok], sz + 1);
                    636:                slot = ohash_qlookup(htab, req->name);
                    637:                ohash_insert(htab, slot, req);
1.85      kristaps  638:        }
1.295     schwarze  639:        return htab;
1.85      kristaps  640: }
                    641:
1.295     schwarze  642: void
                    643: roffhash_free(struct ohash *htab)
1.67      kristaps  644: {
1.295     schwarze  645:        struct roffreq  *req;
                    646:        unsigned int     slot;
1.67      kristaps  647:
1.295     schwarze  648:        if (htab == NULL)
                    649:                return;
                    650:        for (req = ohash_first(htab, &slot); req != NULL;
                    651:             req = ohash_next(htab, &slot))
                    652:                free(req);
                    653:        ohash_delete(htab);
                    654:        free(htab);
                    655: }
                    656:
                    657: enum roff_tok
                    658: roffhash_find(struct ohash *htab, const char *name, size_t sz)
                    659: {
                    660:        struct roffreq  *req;
                    661:        const char      *end;
                    662:
                    663:        if (sz) {
                    664:                end = name + sz;
                    665:                req = ohash_find(htab, ohash_qlookupi(htab, name, &end));
                    666:        } else
                    667:                req = ohash_find(htab, ohash_qlookup(htab, name));
                    668:        return req == NULL ? TOKEN_NONE : req->tok;
1.67      kristaps  669: }
                    670:
1.266     schwarze  671: /* --- stack of request blocks -------------------------------------------- */
                    672:
1.67      kristaps  673: /*
                    674:  * Pop the current node off of the stack of roff instructions currently
                    675:  * pending.
                    676:  */
                    677: static void
                    678: roffnode_pop(struct roff *r)
                    679: {
                    680:        struct roffnode *p;
                    681:
1.75      kristaps  682:        assert(r->last);
1.207     schwarze  683:        p = r->last;
1.82      kristaps  684:
1.75      kristaps  685:        r->last = r->last->parent;
1.106     kristaps  686:        free(p->name);
                    687:        free(p->end);
1.67      kristaps  688:        free(p);
                    689: }
                    690:
                    691: /*
                    692:  * Push a roff node onto the instruction stack.  This must later be
                    693:  * removed with roffnode_pop().
                    694:  */
1.98      schwarze  695: static void
1.294     schwarze  696: roffnode_push(struct roff *r, enum roff_tok tok, const char *name,
1.106     kristaps  697:                int line, int col)
1.67      kristaps  698: {
                    699:        struct roffnode *p;
                    700:
1.98      schwarze  701:        p = mandoc_calloc(1, sizeof(struct roffnode));
1.67      kristaps  702:        p->tok = tok;
1.106     kristaps  703:        if (name)
                    704:                p->name = mandoc_strdup(name);
1.67      kristaps  705:        p->parent = r->last;
                    706:        p->line = line;
                    707:        p->col = col;
1.198     schwarze  708:        p->rule = p->parent ? p->parent->rule : 0;
1.67      kristaps  709:
                    710:        r->last = p;
                    711: }
                    712:
1.266     schwarze  713: /* --- roff parser state data management ---------------------------------- */
                    714:
1.67      kristaps  715: static void
                    716: roff_free1(struct roff *r)
                    717: {
1.176     schwarze  718:        struct tbl_node *tbl;
1.125     kristaps  719:        struct eqn_node *e;
1.167     kristaps  720:        int              i;
1.67      kristaps  721:
1.176     schwarze  722:        while (NULL != (tbl = r->first_tbl)) {
                    723:                r->first_tbl = tbl->next;
                    724:                tbl_free(tbl);
1.109     kristaps  725:        }
1.113     kristaps  726:        r->first_tbl = r->last_tbl = r->tbl = NULL;
                    727:
1.125     kristaps  728:        while (NULL != (e = r->first_eqn)) {
                    729:                r->first_eqn = e->next;
                    730:                eqn_free(e);
                    731:        }
                    732:        r->first_eqn = r->last_eqn = r->eqn = NULL;
                    733:
1.67      kristaps  734:        while (r->last)
                    735:                roffnode_pop(r);
1.109     kristaps  736:
1.223     schwarze  737:        free (r->rstack);
                    738:        r->rstack = NULL;
                    739:        r->rstacksz = 0;
                    740:        r->rstackpos = -1;
                    741:
                    742:        roff_freereg(r->regtab);
                    743:        r->regtab = NULL;
                    744:
1.167     kristaps  745:        roff_freestr(r->strtab);
                    746:        roff_freestr(r->xmbtab);
                    747:        r->strtab = r->xmbtab = NULL;
                    748:
                    749:        if (r->xtab)
                    750:                for (i = 0; i < 128; i++)
                    751:                        free(r->xtab[i].p);
                    752:        free(r->xtab);
                    753:        r->xtab = NULL;
1.67      kristaps  754: }
                    755:
                    756: void
                    757: roff_reset(struct roff *r)
                    758: {
                    759:        roff_free1(r);
1.227     schwarze  760:        r->format = r->options & (MPARSE_MDOC | MPARSE_MAN);
1.303     schwarze  761:        r->control = '\0';
                    762:        r->escape = '\\';
1.67      kristaps  763: }
                    764:
                    765: void
                    766: roff_free(struct roff *r)
                    767: {
                    768:        roff_free1(r);
1.295     schwarze  769:        roffhash_free(r->reqtab);
1.67      kristaps  770:        free(r);
                    771: }
                    772:
                    773: struct roff *
1.279     schwarze  774: roff_alloc(struct mparse *parse, int options)
1.67      kristaps  775: {
                    776:        struct roff     *r;
                    777:
1.98      schwarze  778:        r = mandoc_calloc(1, sizeof(struct roff));
1.128     kristaps  779:        r->parse = parse;
1.295     schwarze  780:        r->reqtab = roffhash_alloc(0, ROFF_USERDEF);
1.199     schwarze  781:        r->options = options;
1.227     schwarze  782:        r->format = options & (MPARSE_MDOC | MPARSE_MAN);
1.82      kristaps  783:        r->rstackpos = -1;
1.303     schwarze  784:        r->escape = '\\';
1.277     schwarze  785:        return r;
1.265     schwarze  786: }
                    787:
1.266     schwarze  788: /* --- syntax tree state data management ---------------------------------- */
                    789:
1.265     schwarze  790: static void
                    791: roff_man_free1(struct roff_man *man)
                    792: {
                    793:
1.266     schwarze  794:        if (man->first != NULL)
                    795:                roff_node_delete(man, man->first);
1.265     schwarze  796:        free(man->meta.msec);
                    797:        free(man->meta.vol);
                    798:        free(man->meta.os);
                    799:        free(man->meta.arch);
                    800:        free(man->meta.title);
                    801:        free(man->meta.name);
                    802:        free(man->meta.date);
                    803: }
                    804:
                    805: static void
                    806: roff_man_alloc1(struct roff_man *man)
                    807: {
                    808:
                    809:        memset(&man->meta, 0, sizeof(man->meta));
                    810:        man->first = mandoc_calloc(1, sizeof(*man->first));
                    811:        man->first->type = ROFFT_ROOT;
                    812:        man->last = man->first;
                    813:        man->last_es = NULL;
                    814:        man->flags = 0;
                    815:        man->macroset = MACROSET_NONE;
                    816:        man->lastsec = man->lastnamed = SEC_NONE;
                    817:        man->next = ROFF_NEXT_CHILD;
                    818: }
                    819:
                    820: void
                    821: roff_man_reset(struct roff_man *man)
                    822: {
                    823:
                    824:        roff_man_free1(man);
                    825:        roff_man_alloc1(man);
                    826: }
                    827:
                    828: void
                    829: roff_man_free(struct roff_man *man)
                    830: {
                    831:
                    832:        roff_man_free1(man);
                    833:        free(man);
                    834: }
                    835:
                    836: struct roff_man *
                    837: roff_man_alloc(struct roff *roff, struct mparse *parse,
                    838:        const char *defos, int quick)
                    839: {
                    840:        struct roff_man *man;
                    841:
                    842:        man = mandoc_calloc(1, sizeof(*man));
                    843:        man->parse = parse;
                    844:        man->roff = roff;
                    845:        man->defos = defos;
                    846:        man->quick = quick;
                    847:        roff_man_alloc1(man);
1.296     schwarze  848:        roff->man = man;
1.277     schwarze  849:        return man;
1.67      kristaps  850: }
                    851:
1.266     schwarze  852: /* --- syntax tree handling ----------------------------------------------- */
                    853:
                    854: struct roff_node *
                    855: roff_node_alloc(struct roff_man *man, int line, int pos,
                    856:        enum roff_type type, int tok)
                    857: {
                    858:        struct roff_node        *n;
                    859:
                    860:        n = mandoc_calloc(1, sizeof(*n));
                    861:        n->line = line;
                    862:        n->pos = pos;
                    863:        n->tok = tok;
                    864:        n->type = type;
                    865:        n->sec = man->lastsec;
                    866:
                    867:        if (man->flags & MDOC_SYNOPSIS)
1.285     schwarze  868:                n->flags |= NODE_SYNPRETTY;
1.266     schwarze  869:        else
1.285     schwarze  870:                n->flags &= ~NODE_SYNPRETTY;
1.266     schwarze  871:        if (man->flags & MDOC_NEWLINE)
1.285     schwarze  872:                n->flags |= NODE_LINE;
1.266     schwarze  873:        man->flags &= ~MDOC_NEWLINE;
                    874:
1.277     schwarze  875:        return n;
1.266     schwarze  876: }
                    877:
                    878: void
                    879: roff_node_append(struct roff_man *man, struct roff_node *n)
                    880: {
                    881:
                    882:        switch (man->next) {
                    883:        case ROFF_NEXT_SIBLING:
1.281     schwarze  884:                if (man->last->next != NULL) {
                    885:                        n->next = man->last->next;
                    886:                        man->last->next->prev = n;
                    887:                } else
                    888:                        man->last->parent->last = n;
1.266     schwarze  889:                man->last->next = n;
                    890:                n->prev = man->last;
                    891:                n->parent = man->last->parent;
                    892:                break;
                    893:        case ROFF_NEXT_CHILD:
1.287     schwarze  894:                if (man->last->child != NULL) {
                    895:                        n->next = man->last->child;
                    896:                        man->last->child->prev = n;
                    897:                } else
                    898:                        man->last->last = n;
1.266     schwarze  899:                man->last->child = n;
                    900:                n->parent = man->last;
                    901:                break;
                    902:        default:
                    903:                abort();
                    904:        }
1.282     schwarze  905:        man->last = n;
1.266     schwarze  906:
                    907:        switch (n->type) {
                    908:        case ROFFT_HEAD:
                    909:                n->parent->head = n;
                    910:                break;
                    911:        case ROFFT_BODY:
1.282     schwarze  912:                if (n->end != ENDBODY_NOT)
                    913:                        return;
1.266     schwarze  914:                n->parent->body = n;
                    915:                break;
                    916:        case ROFFT_TAIL:
                    917:                n->parent->tail = n;
                    918:                break;
                    919:        default:
1.282     schwarze  920:                return;
1.266     schwarze  921:        }
1.282     schwarze  922:
                    923:        /*
                    924:         * Copy over the normalised-data pointer of our parent.  Not
                    925:         * everybody has one, but copying a null pointer is fine.
                    926:         */
                    927:
                    928:        n->norm = n->parent->norm;
                    929:        assert(n->parent->type == ROFFT_BLOCK);
1.266     schwarze  930: }
                    931:
1.267     schwarze  932: void
                    933: roff_word_alloc(struct roff_man *man, int line, int pos, const char *word)
                    934: {
                    935:        struct roff_node        *n;
                    936:
                    937:        n = roff_node_alloc(man, line, pos, ROFFT_TEXT, TOKEN_NONE);
                    938:        n->string = roff_strdup(man->roff, word);
                    939:        roff_node_append(man, n);
1.286     schwarze  940:        n->flags |= NODE_VALID | NODE_ENDED;
1.267     schwarze  941:        man->next = ROFF_NEXT_SIBLING;
                    942: }
                    943:
                    944: void
                    945: roff_word_append(struct roff_man *man, const char *word)
                    946: {
                    947:        struct roff_node        *n;
                    948:        char                    *addstr, *newstr;
                    949:
                    950:        n = man->last;
                    951:        addstr = roff_strdup(man->roff, word);
                    952:        mandoc_asprintf(&newstr, "%s %s", n->string, addstr);
                    953:        free(addstr);
                    954:        free(n->string);
                    955:        n->string = newstr;
                    956:        man->next = ROFF_NEXT_SIBLING;
1.268     schwarze  957: }
                    958:
                    959: void
                    960: roff_elem_alloc(struct roff_man *man, int line, int pos, int tok)
                    961: {
                    962:        struct roff_node        *n;
                    963:
                    964:        n = roff_node_alloc(man, line, pos, ROFFT_ELEM, tok);
                    965:        roff_node_append(man, n);
                    966:        man->next = ROFF_NEXT_CHILD;
                    967: }
                    968:
                    969: struct roff_node *
                    970: roff_block_alloc(struct roff_man *man, int line, int pos, int tok)
                    971: {
                    972:        struct roff_node        *n;
                    973:
                    974:        n = roff_node_alloc(man, line, pos, ROFFT_BLOCK, tok);
                    975:        roff_node_append(man, n);
                    976:        man->next = ROFF_NEXT_CHILD;
1.277     schwarze  977:        return n;
1.267     schwarze  978: }
                    979:
1.266     schwarze  980: struct roff_node *
                    981: roff_head_alloc(struct roff_man *man, int line, int pos, int tok)
                    982: {
                    983:        struct roff_node        *n;
                    984:
                    985:        n = roff_node_alloc(man, line, pos, ROFFT_HEAD, tok);
                    986:        roff_node_append(man, n);
                    987:        man->next = ROFF_NEXT_CHILD;
1.277     schwarze  988:        return n;
1.266     schwarze  989: }
                    990:
                    991: struct roff_node *
                    992: roff_body_alloc(struct roff_man *man, int line, int pos, int tok)
                    993: {
                    994:        struct roff_node        *n;
                    995:
                    996:        n = roff_node_alloc(man, line, pos, ROFFT_BODY, tok);
                    997:        roff_node_append(man, n);
                    998:        man->next = ROFF_NEXT_CHILD;
1.277     schwarze  999:        return n;
1.267     schwarze 1000: }
                   1001:
                   1002: void
                   1003: roff_addeqn(struct roff_man *man, const struct eqn *eqn)
                   1004: {
                   1005:        struct roff_node        *n;
                   1006:
                   1007:        n = roff_node_alloc(man, eqn->ln, eqn->pos, ROFFT_EQN, TOKEN_NONE);
                   1008:        n->eqn = eqn;
                   1009:        if (eqn->ln > man->last->line)
1.285     schwarze 1010:                n->flags |= NODE_LINE;
1.267     schwarze 1011:        roff_node_append(man, n);
                   1012:        man->next = ROFF_NEXT_SIBLING;
                   1013: }
                   1014:
                   1015: void
                   1016: roff_addtbl(struct roff_man *man, const struct tbl_span *tbl)
                   1017: {
                   1018:        struct roff_node        *n;
                   1019:
                   1020:        if (man->macroset == MACROSET_MAN)
1.302     schwarze 1021:                man_breakscope(man, ROFF_TS);
1.267     schwarze 1022:        n = roff_node_alloc(man, tbl->line, 0, ROFFT_TBL, TOKEN_NONE);
                   1023:        n->span = tbl;
                   1024:        roff_node_append(man, n);
1.286     schwarze 1025:        n->flags |= NODE_VALID | NODE_ENDED;
1.267     schwarze 1026:        man->next = ROFF_NEXT_SIBLING;
1.266     schwarze 1027: }
                   1028:
                   1029: void
                   1030: roff_node_unlink(struct roff_man *man, struct roff_node *n)
                   1031: {
                   1032:
                   1033:        /* Adjust siblings. */
                   1034:
                   1035:        if (n->prev)
                   1036:                n->prev->next = n->next;
                   1037:        if (n->next)
                   1038:                n->next->prev = n->prev;
                   1039:
                   1040:        /* Adjust parent. */
                   1041:
                   1042:        if (n->parent != NULL) {
                   1043:                if (n->parent->child == n)
                   1044:                        n->parent->child = n->next;
                   1045:                if (n->parent->last == n)
                   1046:                        n->parent->last = n->prev;
                   1047:        }
                   1048:
                   1049:        /* Adjust parse point. */
                   1050:
                   1051:        if (man == NULL)
                   1052:                return;
                   1053:        if (man->last == n) {
                   1054:                if (n->prev == NULL) {
                   1055:                        man->last = n->parent;
                   1056:                        man->next = ROFF_NEXT_CHILD;
                   1057:                } else {
                   1058:                        man->last = n->prev;
                   1059:                        man->next = ROFF_NEXT_SIBLING;
                   1060:                }
                   1061:        }
                   1062:        if (man->first == n)
                   1063:                man->first = NULL;
                   1064: }
                   1065:
                   1066: void
                   1067: roff_node_free(struct roff_node *n)
                   1068: {
                   1069:
                   1070:        if (n->args != NULL)
                   1071:                mdoc_argv_free(n->args);
                   1072:        if (n->type == ROFFT_BLOCK || n->type == ROFFT_ELEM)
                   1073:                free(n->norm);
                   1074:        free(n->string);
                   1075:        free(n);
                   1076: }
                   1077:
                   1078: void
                   1079: roff_node_delete(struct roff_man *man, struct roff_node *n)
                   1080: {
                   1081:
                   1082:        while (n->child != NULL)
                   1083:                roff_node_delete(man, n->child);
                   1084:        roff_node_unlink(man, n);
                   1085:        roff_node_free(n);
1.269     schwarze 1086: }
                   1087:
                   1088: void
                   1089: deroff(char **dest, const struct roff_node *n)
                   1090: {
                   1091:        char    *cp;
                   1092:        size_t   sz;
                   1093:
                   1094:        if (n->type != ROFFT_TEXT) {
                   1095:                for (n = n->child; n != NULL; n = n->next)
                   1096:                        deroff(dest, n);
                   1097:                return;
                   1098:        }
                   1099:
1.288     schwarze 1100:        /* Skip leading whitespace. */
1.269     schwarze 1101:
1.288     schwarze 1102:        for (cp = n->string; *cp != '\0'; cp++) {
1.289     schwarze 1103:                if (cp[0] == '\\' && cp[1] != '\0' &&
                   1104:                    strchr(" %&0^|~", cp[1]) != NULL)
1.269     schwarze 1105:                        cp++;
1.288     schwarze 1106:                else if ( ! isspace((unsigned char)*cp))
1.269     schwarze 1107:                        break;
                   1108:        }
                   1109:
1.289     schwarze 1110:        /* Skip trailing backslash. */
                   1111:
                   1112:        sz = strlen(cp);
1.290     schwarze 1113:        if (sz > 0 && cp[sz - 1] == '\\')
1.289     schwarze 1114:                sz--;
                   1115:
1.269     schwarze 1116:        /* Skip trailing whitespace. */
                   1117:
1.289     schwarze 1118:        for (; sz; sz--)
1.269     schwarze 1119:                if ( ! isspace((unsigned char)cp[sz-1]))
                   1120:                        break;
                   1121:
                   1122:        /* Skip empty strings. */
                   1123:
                   1124:        if (sz == 0)
                   1125:                return;
                   1126:
                   1127:        if (*dest == NULL) {
                   1128:                *dest = mandoc_strndup(cp, sz);
                   1129:                return;
                   1130:        }
                   1131:
                   1132:        mandoc_asprintf(&cp, "%s %*s", *dest, (int)sz, cp);
                   1133:        free(*dest);
                   1134:        *dest = cp;
1.266     schwarze 1135: }
                   1136:
                   1137: /* --- main functions of the roff parser ---------------------------------- */
                   1138:
1.94      kristaps 1139: /*
1.206     schwarze 1140:  * In the current line, expand escape sequences that tend to get
                   1141:  * used in numerical expressions and conditional requests.
                   1142:  * Also check the syntax of the remaining escape sequences.
1.154     kristaps 1143:  */
1.172     schwarze 1144: static enum rofferr
1.238     schwarze 1145: roff_res(struct roff *r, struct buf *buf, int ln, int pos)
1.94      kristaps 1146: {
1.208     schwarze 1147:        char             ubuf[24]; /* buffer to print the number */
1.205     schwarze 1148:        const char      *start; /* start of the string to process */
1.209     schwarze 1149:        char            *stesc; /* start of an escape sequence ('\\') */
1.108     schwarze 1150:        const char      *stnam; /* start of the name, after "[(*" */
                   1151:        const char      *cp;    /* end of the name, e.g. before ']' */
                   1152:        const char      *res;   /* the string to be substituted */
1.238     schwarze 1153:        char            *nbuf;  /* new buffer to copy buf->buf to */
1.181     schwarze 1154:        size_t           maxl;  /* expected length of the escape name */
                   1155:        size_t           naml;  /* actual length of the escape name */
1.237     schwarze 1156:        enum mandoc_esc  esc;   /* type of the escape sequence */
                   1157:        int              inaml; /* length returned from mandoc_escape() */
1.181     schwarze 1158:        int              expand_count;  /* to avoid infinite loops */
1.206     schwarze 1159:        int              npos;  /* position in numeric expression */
1.218     schwarze 1160:        int              arg_complete; /* argument not interrupted by eol */
1.303     schwarze 1161:        int              done;  /* no more input available */
1.206     schwarze 1162:        char             term;  /* character terminating the escape */
1.94      kristaps 1163:
1.303     schwarze 1164:        /* Search forward for comments. */
                   1165:
                   1166:        done = 0;
                   1167:        start = buf->buf + pos;
                   1168:        for (stesc = buf->buf + pos; *stesc != '\0'; stesc++) {
                   1169:                if (stesc[0] != r->escape || stesc[1] == '\0')
                   1170:                        continue;
                   1171:                stesc++;
                   1172:                if (*stesc != '"' && *stesc != '#')
                   1173:                        continue;
                   1174:                cp = strchr(stesc--, '\0') - 1;
                   1175:                if (*cp == '\n') {
                   1176:                        done = 1;
                   1177:                        cp--;
                   1178:                }
                   1179:                if (*cp == ' ' || *cp == '\t')
                   1180:                        mandoc_msg(MANDOCERR_SPACE_EOL, r->parse,
                   1181:                            ln, cp - buf->buf, NULL);
                   1182:                while (stesc > start && stesc[-1] == ' ')
                   1183:                        stesc--;
                   1184:                *stesc = '\0';
                   1185:                break;
                   1186:        }
                   1187:        if (stesc == start)
                   1188:                return ROFF_CONT;
                   1189:        stesc--;
                   1190:
                   1191:        /* Notice the end of the input. */
                   1192:
                   1193:        if (*stesc == '\n') {
                   1194:                *stesc-- = '\0';
                   1195:                done = 1;
                   1196:        }
                   1197:
1.170     schwarze 1198:        expand_count = 0;
1.303     schwarze 1199:        while (stesc >= start) {
1.170     schwarze 1200:
1.205     schwarze 1201:                /* Search backwards for the next backslash. */
                   1202:
1.303     schwarze 1203:                if (*stesc != r->escape) {
                   1204:                        if (*stesc == '\\') {
                   1205:                                *stesc = '\0';
                   1206:                                buf->sz = mandoc_asprintf(&nbuf, "%s\\e%s",
                   1207:                                    buf->buf, stesc + 1) + 1;
                   1208:                                start = nbuf + pos;
                   1209:                                stesc = nbuf + (stesc - buf->buf);
                   1210:                                free(buf->buf);
                   1211:                                buf->buf = nbuf;
                   1212:                        }
                   1213:                        stesc--;
1.205     schwarze 1214:                        continue;
1.303     schwarze 1215:                }
1.205     schwarze 1216:
                   1217:                /* If it is escaped, skip it. */
                   1218:
                   1219:                for (cp = stesc - 1; cp >= start; cp--)
1.303     schwarze 1220:                        if (*cp != r->escape)
1.205     schwarze 1221:                                break;
                   1222:
1.238     schwarze 1223:                if ((stesc - cp) % 2 == 0) {
1.303     schwarze 1224:                        while (stesc > cp)
                   1225:                                *stesc-- = '\\';
1.205     schwarze 1226:                        continue;
1.303     schwarze 1227:                } else if (stesc[1] != '\0') {
                   1228:                        *stesc = '\\';
                   1229:                } else {
                   1230:                        *stesc-- = '\0';
                   1231:                        if (done)
                   1232:                                continue;
                   1233:                        else
                   1234:                                return ROFF_APPEND;
1.205     schwarze 1235:                }
1.108     schwarze 1236:
1.206     schwarze 1237:                /* Decide whether to expand or to check only. */
1.108     schwarze 1238:
1.206     schwarze 1239:                term = '\0';
1.205     schwarze 1240:                cp = stesc + 1;
1.181     schwarze 1241:                switch (*cp) {
1.207     schwarze 1242:                case '*':
1.181     schwarze 1243:                        res = NULL;
                   1244:                        break;
1.207     schwarze 1245:                case 'B':
                   1246:                case 'w':
1.206     schwarze 1247:                        term = cp[1];
                   1248:                        /* FALLTHROUGH */
1.207     schwarze 1249:                case 'n':
1.181     schwarze 1250:                        res = ubuf;
                   1251:                        break;
                   1252:                default:
1.237     schwarze 1253:                        esc = mandoc_escape(&cp, &stnam, &inaml);
                   1254:                        if (esc == ESCAPE_ERROR ||
                   1255:                            (esc == ESCAPE_SPECIAL &&
1.279     schwarze 1256:                             mchars_spec2cp(stnam, inaml) < 0))
1.219     schwarze 1257:                                mandoc_vmsg(MANDOCERR_ESC_BAD,
1.238     schwarze 1258:                                    r->parse, ln, (int)(stesc - buf->buf),
1.219     schwarze 1259:                                    "%.*s", (int)(cp - stesc), stesc);
1.303     schwarze 1260:                        stesc--;
1.205     schwarze 1261:                        continue;
1.152     kristaps 1262:                }
                   1263:
1.205     schwarze 1264:                if (EXPAND_LIMIT < ++expand_count) {
                   1265:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
1.238     schwarze 1266:                            ln, (int)(stesc - buf->buf), NULL);
1.277     schwarze 1267:                        return ROFF_IGN;
1.205     schwarze 1268:                }
1.108     schwarze 1269:
                   1270:                /*
                   1271:                 * The third character decides the length
1.181     schwarze 1272:                 * of the name of the string or register.
1.108     schwarze 1273:                 * Save a pointer to the name.
                   1274:                 */
                   1275:
1.238     schwarze 1276:                if (term == '\0') {
1.206     schwarze 1277:                        switch (*++cp) {
1.207     schwarze 1278:                        case '\0':
1.206     schwarze 1279:                                maxl = 0;
                   1280:                                break;
1.207     schwarze 1281:                        case '(':
1.206     schwarze 1282:                                cp++;
                   1283:                                maxl = 2;
                   1284:                                break;
1.207     schwarze 1285:                        case '[':
1.206     schwarze 1286:                                cp++;
                   1287:                                term = ']';
                   1288:                                maxl = 0;
                   1289:                                break;
                   1290:                        default:
                   1291:                                maxl = 1;
                   1292:                                break;
                   1293:                        }
                   1294:                } else {
                   1295:                        cp += 2;
1.94      kristaps 1296:                        maxl = 0;
                   1297:                }
1.108     schwarze 1298:                stnam = cp;
1.94      kristaps 1299:
1.108     schwarze 1300:                /* Advance to the end of the name. */
1.94      kristaps 1301:
1.253     schwarze 1302:                naml = 0;
1.218     schwarze 1303:                arg_complete = 1;
1.253     schwarze 1304:                while (maxl == 0 || naml < maxl) {
1.238     schwarze 1305:                        if (*cp == '\0') {
1.219     schwarze 1306:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 1307:                                    ln, (int)(stesc - buf->buf), stesc);
1.218     schwarze 1308:                                arg_complete = 0;
1.206     schwarze 1309:                                break;
1.153     kristaps 1310:                        }
1.238     schwarze 1311:                        if (maxl == 0 && *cp == term) {
1.206     schwarze 1312:                                cp++;
1.253     schwarze 1313:                                break;
                   1314:                        }
                   1315:                        if (*cp++ != '\\' || stesc[1] != 'w') {
                   1316:                                naml++;
                   1317:                                continue;
                   1318:                        }
                   1319:                        switch (mandoc_escape(&cp, NULL, NULL)) {
                   1320:                        case ESCAPE_SPECIAL:
                   1321:                        case ESCAPE_UNICODE:
                   1322:                        case ESCAPE_NUMBERED:
                   1323:                        case ESCAPE_OVERSTRIKE:
                   1324:                                naml++;
                   1325:                                break;
                   1326:                        default:
1.94      kristaps 1327:                                break;
1.206     schwarze 1328:                        }
1.94      kristaps 1329:                }
                   1330:
1.108     schwarze 1331:                /*
                   1332:                 * Retrieve the replacement string; if it is
                   1333:                 * undefined, resume searching for escapes.
                   1334:                 */
                   1335:
1.206     schwarze 1336:                switch (stesc[1]) {
1.207     schwarze 1337:                case '*':
1.218     schwarze 1338:                        if (arg_complete)
                   1339:                                res = roff_getstrn(r, stnam, naml);
1.206     schwarze 1340:                        break;
1.207     schwarze 1341:                case 'B':
1.206     schwarze 1342:                        npos = 0;
1.218     schwarze 1343:                        ubuf[0] = arg_complete &&
1.261     schwarze 1344:                            roff_evalnum(r, ln, stnam, &npos,
                   1345:                              NULL, ROFFNUM_SCALE) &&
1.218     schwarze 1346:                            stnam + npos + 1 == cp ? '1' : '0';
1.206     schwarze 1347:                        ubuf[1] = '\0';
                   1348:                        break;
1.207     schwarze 1349:                case 'n':
1.218     schwarze 1350:                        if (arg_complete)
                   1351:                                (void)snprintf(ubuf, sizeof(ubuf), "%d",
                   1352:                                    roff_getregn(r, stnam, naml));
                   1353:                        else
                   1354:                                ubuf[0] = '\0';
1.206     schwarze 1355:                        break;
1.207     schwarze 1356:                case 'w':
1.218     schwarze 1357:                        /* use even incomplete args */
1.208     schwarze 1358:                        (void)snprintf(ubuf, sizeof(ubuf), "%d",
1.206     schwarze 1359:                            24 * (int)naml);
                   1360:                        break;
                   1361:                }
1.94      kristaps 1362:
1.238     schwarze 1363:                if (res == NULL) {
1.219     schwarze 1364:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1365:                            r->parse, ln, (int)(stesc - buf->buf),
1.219     schwarze 1366:                            "%.*s", (int)naml, stnam);
1.142     kristaps 1367:                        res = "";
1.246     schwarze 1368:                } else if (buf->sz + strlen(res) > SHRT_MAX) {
                   1369:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
                   1370:                            ln, (int)(stesc - buf->buf), NULL);
1.277     schwarze 1371:                        return ROFF_IGN;
1.94      kristaps 1372:                }
                   1373:
1.108     schwarze 1374:                /* Replace the escape sequence by the string. */
                   1375:
1.209     schwarze 1376:                *stesc = '\0';
1.238     schwarze 1377:                buf->sz = mandoc_asprintf(&nbuf, "%s%s%s",
                   1378:                    buf->buf, res, cp) + 1;
1.94      kristaps 1379:
1.205     schwarze 1380:                /* Prepare for the next replacement. */
1.94      kristaps 1381:
1.205     schwarze 1382:                start = nbuf + pos;
1.238     schwarze 1383:                stesc = nbuf + (stesc - buf->buf) + strlen(res);
                   1384:                free(buf->buf);
                   1385:                buf->buf = nbuf;
1.154     kristaps 1386:        }
1.277     schwarze 1387:        return ROFF_CONT;
1.154     kristaps 1388: }
                   1389:
                   1390: /*
1.275     schwarze 1391:  * Process text streams.
1.154     kristaps 1392:  */
                   1393: static enum rofferr
1.305   ! schwarze 1394: roff_parsetext(struct roff *r, struct buf *buf, int pos, int *offs)
1.154     kristaps 1395: {
                   1396:        size_t           sz;
                   1397:        const char      *start;
1.178     schwarze 1398:        char            *p;
                   1399:        int              isz;
1.154     kristaps 1400:        enum mandoc_esc  esc;
                   1401:
1.275     schwarze 1402:        /* Spring the input line trap. */
                   1403:
                   1404:        if (roffit_lines == 1) {
                   1405:                isz = mandoc_asprintf(&p, "%s\n.%s", buf->buf, roffit_macro);
                   1406:                free(buf->buf);
                   1407:                buf->buf = p;
                   1408:                buf->sz = isz + 1;
                   1409:                *offs = 0;
                   1410:                free(roffit_macro);
                   1411:                roffit_lines = 0;
1.277     schwarze 1412:                return ROFF_REPARSE;
1.275     schwarze 1413:        } else if (roffit_lines > 1)
                   1414:                --roffit_lines;
                   1415:
1.305   ! schwarze 1416:        if (roffce_node != NULL && buf->buf[pos] != '\0') {
        !          1417:                if (roffce_lines < 1) {
        !          1418:                        r->man->last = roffce_node;
        !          1419:                        r->man->next = ROFF_NEXT_SIBLING;
        !          1420:                        roffce_lines = 0;
        !          1421:                        roffce_node = NULL;
        !          1422:                } else
        !          1423:                        roffce_lines--;
        !          1424:        }
        !          1425:
1.275     schwarze 1426:        /* Convert all breakable hyphens into ASCII_HYPH. */
                   1427:
1.238     schwarze 1428:        start = p = buf->buf + pos;
1.154     kristaps 1429:
1.238     schwarze 1430:        while (*p != '\0') {
1.154     kristaps 1431:                sz = strcspn(p, "-\\");
                   1432:                p += sz;
                   1433:
1.238     schwarze 1434:                if (*p == '\0')
1.159     kristaps 1435:                        break;
                   1436:
1.238     schwarze 1437:                if (*p == '\\') {
1.154     kristaps 1438:                        /* Skip over escapes. */
                   1439:                        p++;
1.189     schwarze 1440:                        esc = mandoc_escape((const char **)&p, NULL, NULL);
1.238     schwarze 1441:                        if (esc == ESCAPE_ERROR)
1.154     kristaps 1442:                                break;
1.264     schwarze 1443:                        while (*p == '-')
                   1444:                                p++;
1.155     kristaps 1445:                        continue;
1.159     kristaps 1446:                } else if (p == start) {
1.158     kristaps 1447:                        p++;
1.155     kristaps 1448:                        continue;
1.158     kristaps 1449:                }
1.155     kristaps 1450:
1.171     schwarze 1451:                if (isalpha((unsigned char)p[-1]) &&
                   1452:                    isalpha((unsigned char)p[1]))
1.155     kristaps 1453:                        *p = ASCII_HYPH;
                   1454:                p++;
1.94      kristaps 1455:        }
1.277     schwarze 1456:        return ROFF_CONT;
1.94      kristaps 1457: }
                   1458:
1.67      kristaps 1459: enum rofferr
1.238     schwarze 1460: roff_parseln(struct roff *r, int ln, struct buf *buf, int *offs)
1.67      kristaps 1461: {
1.294     schwarze 1462:        enum roff_tok    t;
1.109     kristaps 1463:        enum rofferr     e;
1.238     schwarze 1464:        int              pos;   /* parse point */
1.243     schwarze 1465:        int              spos;  /* saved parse point for messages */
1.238     schwarze 1466:        int              ppos;  /* original offset in buf->buf */
                   1467:        int              ctl;   /* macro line (boolean) */
                   1468:
                   1469:        ppos = pos = *offs;
1.79      kristaps 1470:
1.230     schwarze 1471:        /* Handle in-line equation delimiters. */
                   1472:
1.236     schwarze 1473:        if (r->tbl == NULL &&
                   1474:            r->last_eqn != NULL && r->last_eqn->delim &&
1.230     schwarze 1475:            (r->eqn == NULL || r->eqn_inline)) {
1.238     schwarze 1476:                e = roff_eqndelim(r, buf, pos);
1.230     schwarze 1477:                if (e == ROFF_REPARSE)
1.277     schwarze 1478:                        return e;
1.230     schwarze 1479:                assert(e == ROFF_CONT);
                   1480:        }
                   1481:
                   1482:        /* Expand some escape sequences. */
1.94      kristaps 1483:
1.238     schwarze 1484:        e = roff_res(r, buf, ln, pos);
1.303     schwarze 1485:        if (e == ROFF_IGN || e == ROFF_APPEND)
1.277     schwarze 1486:                return e;
1.238     schwarze 1487:        assert(e == ROFF_CONT);
1.94      kristaps 1488:
1.238     schwarze 1489:        ctl = roff_getcontrol(r, buf->buf, &pos);
1.130     kristaps 1490:
1.94      kristaps 1491:        /*
1.79      kristaps 1492:         * First, if a scope is open and we're not a macro, pass the
1.252     schwarze 1493:         * text through the macro's filter.
                   1494:         * Equations process all content themselves.
                   1495:         * Tables process almost all content themselves, but we want
                   1496:         * to warn about macros before passing it there.
1.79      kristaps 1497:         */
1.74      kristaps 1498:
1.252     schwarze 1499:        if (r->last != NULL && ! ctl) {
1.78      kristaps 1500:                t = r->last->tok;
1.238     schwarze 1501:                e = (*roffs[t].text)(r, t, buf, ln, pos, pos, offs);
1.294     schwarze 1502:                if (e == ROFF_IGN)
1.277     schwarze 1503:                        return e;
1.294     schwarze 1504:                assert(e == ROFF_CONT);
1.182     schwarze 1505:        }
1.252     schwarze 1506:        if (r->eqn != NULL)
1.277     schwarze 1507:                return eqn_read(&r->eqn, ln, buf->buf, ppos, offs);
1.252     schwarze 1508:        if (r->tbl != NULL && ( ! ctl || buf->buf[pos] == '\0'))
1.277     schwarze 1509:                return tbl_read(r->tbl, ln, buf->buf, ppos);
1.252     schwarze 1510:        if ( ! ctl)
1.305   ! schwarze 1511:                return roff_parsetext(r, buf, pos, offs);
1.228     schwarze 1512:
                   1513:        /* Skip empty request lines. */
                   1514:
1.238     schwarze 1515:        if (buf->buf[pos] == '"') {
1.228     schwarze 1516:                mandoc_msg(MANDOCERR_COMMENT_BAD, r->parse,
                   1517:                    ln, pos, NULL);
1.277     schwarze 1518:                return ROFF_IGN;
1.238     schwarze 1519:        } else if (buf->buf[pos] == '\0')
1.277     schwarze 1520:                return ROFF_IGN;
1.67      kristaps 1521:
1.79      kristaps 1522:        /*
                   1523:         * If a scope is open, go to the child handler for that macro,
                   1524:         * as it may want to preprocess before doing anything with it.
1.125     kristaps 1525:         * Don't do so if an equation is open.
1.79      kristaps 1526:         */
1.78      kristaps 1527:
1.79      kristaps 1528:        if (r->last) {
                   1529:                t = r->last->tok;
1.277     schwarze 1530:                return (*roffs[t].sub)(r, t, buf, ln, ppos, pos, offs);
1.79      kristaps 1531:        }
1.78      kristaps 1532:
1.243     schwarze 1533:        /* No scope is open.  This is a new request or macro. */
                   1534:
                   1535:        spos = pos;
                   1536:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
                   1537:
                   1538:        /* Tables ignore most macros. */
                   1539:
1.294     schwarze 1540:        if (r->tbl != NULL && (t == TOKEN_NONE || t == ROFF_TS)) {
1.243     schwarze 1541:                mandoc_msg(MANDOCERR_TBLMACRO, r->parse,
                   1542:                    ln, pos, buf->buf + spos);
1.257     schwarze 1543:                if (t == ROFF_TS)
1.277     schwarze 1544:                        return ROFF_IGN;
1.257     schwarze 1545:                while (buf->buf[pos] != '\0' && buf->buf[pos] != ' ')
                   1546:                        pos++;
1.291     schwarze 1547:                while (buf->buf[pos] == ' ')
1.257     schwarze 1548:                        pos++;
1.277     schwarze 1549:                return tbl_read(r->tbl, ln, buf->buf, pos);
1.243     schwarze 1550:        }
                   1551:
1.305   ! schwarze 1552:        /* For now, let high level macros abort .ce mode. */
        !          1553:
        !          1554:        if (ctl && roffce_node != NULL &&
        !          1555:            (t == TOKEN_NONE || t == ROFF_EQ || t == ROFF_TS)) {
        !          1556:                r->man->last = roffce_node;
        !          1557:                r->man->next = ROFF_NEXT_SIBLING;
        !          1558:                roffce_lines = 0;
        !          1559:                roffce_node = NULL;
        !          1560:        }
        !          1561:
1.79      kristaps 1562:        /*
1.243     schwarze 1563:         * This is neither a roff request nor a user-defined macro.
                   1564:         * Let the standard macro set parsers handle it.
1.79      kristaps 1565:         */
1.67      kristaps 1566:
1.294     schwarze 1567:        if (t == TOKEN_NONE)
1.277     schwarze 1568:                return ROFF_CONT;
1.243     schwarze 1569:
                   1570:        /* Execute a roff request or a user defined macro. */
1.67      kristaps 1571:
1.296     schwarze 1572:        return (*roffs[t].proc)(r, t, buf, ln, spos, pos, offs);
1.74      kristaps 1573: }
                   1574:
1.117     kristaps 1575: void
1.74      kristaps 1576: roff_endparse(struct roff *r)
                   1577: {
                   1578:
1.110     kristaps 1579:        if (r->last)
1.221     schwarze 1580:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1581:                    r->last->line, r->last->col,
1.295     schwarze 1582:                    roff_name[r->last->tok]);
1.117     kristaps 1583:
1.125     kristaps 1584:        if (r->eqn) {
1.221     schwarze 1585:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1586:                    r->eqn->eqn.ln, r->eqn->eqn.pos, "EQ");
1.151     kristaps 1587:                eqn_end(&r->eqn);
1.125     kristaps 1588:        }
                   1589:
1.117     kristaps 1590:        if (r->tbl) {
1.221     schwarze 1591:                mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
                   1592:                    r->tbl->line, r->tbl->pos, "TS");
1.151     kristaps 1593:                tbl_end(&r->tbl);
1.117     kristaps 1594:        }
1.67      kristaps 1595: }
                   1596:
                   1597: /*
                   1598:  * Parse a roff node's type from the input buffer.  This must be in the
                   1599:  * form of ".foo xxx" in the usual way.
                   1600:  */
1.294     schwarze 1601: static enum roff_tok
1.214     schwarze 1602: roff_parse(struct roff *r, char *buf, int *pos, int ln, int ppos)
1.67      kristaps 1603: {
1.214     schwarze 1604:        char            *cp;
1.106     kristaps 1605:        const char      *mac;
                   1606:        size_t           maclen;
1.294     schwarze 1607:        enum roff_tok    t;
1.67      kristaps 1608:
1.214     schwarze 1609:        cp = buf + *pos;
                   1610:
                   1611:        if ('\0' == *cp || '"' == *cp || '\t' == *cp || ' ' == *cp)
1.294     schwarze 1612:                return TOKEN_NONE;
1.67      kristaps 1613:
1.214     schwarze 1614:        mac = cp;
                   1615:        maclen = roff_getname(r, &cp, ln, ppos);
1.67      kristaps 1616:
1.106     kristaps 1617:        t = (r->current_string = roff_getstrn(r, mac, maclen))
1.295     schwarze 1618:            ? ROFF_USERDEF : roffhash_find(r->reqtab, mac, maclen);
1.67      kristaps 1619:
1.294     schwarze 1620:        if (t != TOKEN_NONE)
1.214     schwarze 1621:                *pos = cp - buf;
1.67      kristaps 1622:
1.277     schwarze 1623:        return t;
1.67      kristaps 1624: }
                   1625:
1.266     schwarze 1626: /* --- handling of request blocks ----------------------------------------- */
                   1627:
1.67      kristaps 1628: static enum rofferr
1.76      kristaps 1629: roff_cblock(ROFF_ARGS)
1.67      kristaps 1630: {
                   1631:
1.79      kristaps 1632:        /*
                   1633:         * A block-close `..' should only be invoked as a child of an
                   1634:         * ignore macro, otherwise raise a warning and just ignore it.
                   1635:         */
                   1636:
1.238     schwarze 1637:        if (r->last == NULL) {
1.221     schwarze 1638:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1639:                    ln, ppos, "..");
1.277     schwarze 1640:                return ROFF_IGN;
1.76      kristaps 1641:        }
1.67      kristaps 1642:
1.81      kristaps 1643:        switch (r->last->tok) {
1.207     schwarze 1644:        case ROFF_am:
1.220     schwarze 1645:                /* ROFF_am1 is remapped to ROFF_am in roff_block(). */
1.207     schwarze 1646:        case ROFF_ami:
                   1647:        case ROFF_de:
1.108     schwarze 1648:                /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
1.207     schwarze 1649:        case ROFF_dei:
                   1650:        case ROFF_ig:
1.81      kristaps 1651:                break;
                   1652:        default:
1.221     schwarze 1653:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1654:                    ln, ppos, "..");
1.277     schwarze 1655:                return ROFF_IGN;
1.76      kristaps 1656:        }
1.67      kristaps 1657:
1.238     schwarze 1658:        if (buf->buf[pos] != '\0')
1.217     schwarze 1659:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238     schwarze 1660:                    ".. %s", buf->buf + pos);
1.71      kristaps 1661:
                   1662:        roffnode_pop(r);
1.76      kristaps 1663:        roffnode_cleanscope(r);
1.277     schwarze 1664:        return ROFF_IGN;
1.71      kristaps 1665:
1.67      kristaps 1666: }
                   1667:
1.76      kristaps 1668: static void
                   1669: roffnode_cleanscope(struct roff *r)
1.67      kristaps 1670: {
                   1671:
1.76      kristaps 1672:        while (r->last) {
1.173     schwarze 1673:                if (--r->last->endspan != 0)
1.76      kristaps 1674:                        break;
                   1675:                roffnode_pop(r);
                   1676:        }
1.67      kristaps 1677: }
                   1678:
1.195     schwarze 1679: static void
                   1680: roff_ccond(struct roff *r, int ln, int ppos)
1.74      kristaps 1681: {
                   1682:
1.76      kristaps 1683:        if (NULL == r->last) {
1.221     schwarze 1684:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1685:                    ln, ppos, "\\}");
1.195     schwarze 1686:                return;
1.76      kristaps 1687:        }
                   1688:
1.82      kristaps 1689:        switch (r->last->tok) {
1.207     schwarze 1690:        case ROFF_el:
                   1691:        case ROFF_ie:
                   1692:        case ROFF_if:
1.82      kristaps 1693:                break;
                   1694:        default:
1.221     schwarze 1695:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1696:                    ln, ppos, "\\}");
1.195     schwarze 1697:                return;
1.75      kristaps 1698:        }
                   1699:
1.76      kristaps 1700:        if (r->last->endspan > -1) {
1.221     schwarze 1701:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   1702:                    ln, ppos, "\\}");
1.195     schwarze 1703:                return;
1.76      kristaps 1704:        }
                   1705:
1.75      kristaps 1706:        roffnode_pop(r);
1.76      kristaps 1707:        roffnode_cleanscope(r);
1.195     schwarze 1708:        return;
1.76      kristaps 1709: }
                   1710:
                   1711: static enum rofferr
1.80      kristaps 1712: roff_block(ROFF_ARGS)
1.76      kristaps 1713: {
1.220     schwarze 1714:        const char      *name;
                   1715:        char            *iname, *cp;
1.213     schwarze 1716:        size_t           namesz;
1.106     kristaps 1717:
1.220     schwarze 1718:        /* Ignore groff compatibility mode for now. */
1.76      kristaps 1719:
1.238     schwarze 1720:        if (tok == ROFF_de1)
1.220     schwarze 1721:                tok = ROFF_de;
1.251     schwarze 1722:        else if (tok == ROFF_dei1)
                   1723:                tok = ROFF_dei;
1.238     schwarze 1724:        else if (tok == ROFF_am1)
1.220     schwarze 1725:                tok = ROFF_am;
1.251     schwarze 1726:        else if (tok == ROFF_ami1)
                   1727:                tok = ROFF_ami;
1.220     schwarze 1728:
                   1729:        /* Parse the macro name argument. */
                   1730:
1.238     schwarze 1731:        cp = buf->buf + pos;
                   1732:        if (tok == ROFF_ig) {
1.220     schwarze 1733:                iname = NULL;
                   1734:                namesz = 0;
                   1735:        } else {
                   1736:                iname = cp;
                   1737:                namesz = roff_getname(r, &cp, ln, ppos);
                   1738:                iname[namesz] = '\0';
                   1739:        }
1.107     kristaps 1740:
1.220     schwarze 1741:        /* Resolve the macro name argument if it is indirect. */
1.107     kristaps 1742:
1.238     schwarze 1743:        if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
                   1744:                if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.220     schwarze 1745:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1746:                            r->parse, ln, (int)(iname - buf->buf),
1.220     schwarze 1747:                            "%.*s", (int)namesz, iname);
                   1748:                        namesz = 0;
                   1749:                } else
                   1750:                        namesz = strlen(name);
                   1751:        } else
                   1752:                name = iname;
1.107     kristaps 1753:
1.238     schwarze 1754:        if (namesz == 0 && tok != ROFF_ig) {
1.220     schwarze 1755:                mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse,
1.295     schwarze 1756:                    ln, ppos, roff_name[tok]);
1.277     schwarze 1757:                return ROFF_IGN;
1.220     schwarze 1758:        }
1.80      kristaps 1759:
1.106     kristaps 1760:        roffnode_push(r, tok, name, ln, ppos);
                   1761:
                   1762:        /*
                   1763:         * At the beginning of a `de' macro, clear the existing string
                   1764:         * with the same name, if there is one.  New content will be
1.193     schwarze 1765:         * appended from roff_block_text() in multiline mode.
1.106     kristaps 1766:         */
1.107     kristaps 1767:
1.238     schwarze 1768:        if (tok == ROFF_de || tok == ROFF_dei)
1.213     schwarze 1769:                roff_setstrn(&r->strtab, name, namesz, "", 0, 0);
1.76      kristaps 1770:
1.238     schwarze 1771:        if (*cp == '\0')
1.277     schwarze 1772:                return ROFF_IGN;
1.78      kristaps 1773:
1.220     schwarze 1774:        /* Get the custom end marker. */
1.107     kristaps 1775:
1.220     schwarze 1776:        iname = cp;
1.213     schwarze 1777:        namesz = roff_getname(r, &cp, ln, ppos);
1.220     schwarze 1778:
                   1779:        /* Resolve the end marker if it is indirect. */
                   1780:
1.238     schwarze 1781:        if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
                   1782:                if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.220     schwarze 1783:                        mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.238     schwarze 1784:                            r->parse, ln, (int)(iname - buf->buf),
1.220     schwarze 1785:                            "%.*s", (int)namesz, iname);
                   1786:                        namesz = 0;
                   1787:                } else
                   1788:                        namesz = strlen(name);
                   1789:        } else
                   1790:                name = iname;
                   1791:
1.213     schwarze 1792:        if (namesz)
                   1793:                r->last->end = mandoc_strndup(name, namesz);
1.78      kristaps 1794:
1.238     schwarze 1795:        if (*cp != '\0')
1.217     schwarze 1796:                mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
1.295     schwarze 1797:                    ln, pos, ".%s ... %s", roff_name[tok], cp);
1.74      kristaps 1798:
1.277     schwarze 1799:        return ROFF_IGN;
1.78      kristaps 1800: }
                   1801:
                   1802: static enum rofferr
1.80      kristaps 1803: roff_block_sub(ROFF_ARGS)
1.79      kristaps 1804: {
1.294     schwarze 1805:        enum roff_tok   t;
1.79      kristaps 1806:        int             i, j;
                   1807:
                   1808:        /*
                   1809:         * First check whether a custom macro exists at this level.  If
                   1810:         * it does, then check against it.  This is some of groff's
                   1811:         * stranger behaviours.  If we encountered a custom end-scope
                   1812:         * tag and that tag also happens to be a "real" macro, then we
                   1813:         * need to try interpreting it again as a real macro.  If it's
                   1814:         * not, then return ignore.  Else continue.
                   1815:         */
                   1816:
                   1817:        if (r->last->end) {
1.130     kristaps 1818:                for (i = pos, j = 0; r->last->end[j]; j++, i++)
1.238     schwarze 1819:                        if (buf->buf[i] != r->last->end[j])
1.79      kristaps 1820:                                break;
                   1821:
1.238     schwarze 1822:                if (r->last->end[j] == '\0' &&
                   1823:                    (buf->buf[i] == '\0' ||
                   1824:                     buf->buf[i] == ' ' ||
                   1825:                     buf->buf[i] == '\t')) {
1.79      kristaps 1826:                        roffnode_pop(r);
                   1827:                        roffnode_cleanscope(r);
                   1828:
1.238     schwarze 1829:                        while (buf->buf[i] == ' ' || buf->buf[i] == '\t')
1.130     kristaps 1830:                                i++;
                   1831:
                   1832:                        pos = i;
1.238     schwarze 1833:                        if (roff_parse(r, buf->buf, &pos, ln, ppos) !=
1.294     schwarze 1834:                            TOKEN_NONE)
1.277     schwarze 1835:                                return ROFF_RERUN;
                   1836:                        return ROFF_IGN;
1.79      kristaps 1837:                }
                   1838:        }
                   1839:
                   1840:        /*
                   1841:         * If we have no custom end-query or lookup failed, then try
                   1842:         * pulling it out of the hashtable.
                   1843:         */
                   1844:
1.238     schwarze 1845:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.79      kristaps 1846:
1.238     schwarze 1847:        if (t != ROFF_cblock) {
                   1848:                if (tok != ROFF_ig)
                   1849:                        roff_setstr(r, r->last->name, buf->buf + ppos, 2);
1.277     schwarze 1850:                return ROFF_IGN;
1.106     kristaps 1851:        }
1.79      kristaps 1852:
1.277     schwarze 1853:        return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
1.79      kristaps 1854: }
                   1855:
                   1856: static enum rofferr
1.80      kristaps 1857: roff_block_text(ROFF_ARGS)
1.78      kristaps 1858: {
                   1859:
1.238     schwarze 1860:        if (tok != ROFF_ig)
                   1861:                roff_setstr(r, r->last->name, buf->buf + pos, 2);
1.106     kristaps 1862:
1.277     schwarze 1863:        return ROFF_IGN;
1.78      kristaps 1864: }
                   1865:
                   1866: static enum rofferr
1.82      kristaps 1867: roff_cond_sub(ROFF_ARGS)
                   1868: {
1.294     schwarze 1869:        enum roff_tok    t;
1.139     kristaps 1870:        char            *ep;
1.198     schwarze 1871:        int              rr;
1.82      kristaps 1872:
                   1873:        rr = r->last->rule;
1.139     kristaps 1874:        roffnode_cleanscope(r);
1.238     schwarze 1875:        t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.82      kristaps 1876:
1.139     kristaps 1877:        /*
1.177     schwarze 1878:         * Fully handle known macros when they are structurally
                   1879:         * required or when the conditional evaluated to true.
1.87      kristaps 1880:         */
                   1881:
1.294     schwarze 1882:        if (t != TOKEN_NONE && (rr || roffs[t].flags & ROFFMAC_STRUCT))
1.277     schwarze 1883:                return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
1.144     kristaps 1884:
1.196     schwarze 1885:        /*
                   1886:         * If `\}' occurs on a macro line without a preceding macro,
                   1887:         * drop the line completely.
                   1888:         */
                   1889:
1.238     schwarze 1890:        ep = buf->buf + pos;
                   1891:        if (ep[0] == '\\' && ep[1] == '}')
1.198     schwarze 1892:                rr = 0;
1.196     schwarze 1893:
1.177     schwarze 1894:        /* Always check for the closing delimiter `\}'. */
1.144     kristaps 1895:
1.238     schwarze 1896:        while ((ep = strchr(ep, '\\')) != NULL) {
                   1897:                if (*(++ep) == '}') {
1.197     schwarze 1898:                        *ep = '&';
1.238     schwarze 1899:                        roff_ccond(r, ln, ep - buf->buf - 1);
1.197     schwarze 1900:                }
1.247     schwarze 1901:                if (*ep != '\0')
                   1902:                        ++ep;
1.177     schwarze 1903:        }
1.277     schwarze 1904:        return rr ? ROFF_CONT : ROFF_IGN;
1.82      kristaps 1905: }
                   1906:
                   1907: static enum rofferr
                   1908: roff_cond_text(ROFF_ARGS)
1.78      kristaps 1909: {
1.140     kristaps 1910:        char            *ep;
1.198     schwarze 1911:        int              rr;
1.82      kristaps 1912:
                   1913:        rr = r->last->rule;
1.140     kristaps 1914:        roffnode_cleanscope(r);
1.82      kristaps 1915:
1.238     schwarze 1916:        ep = buf->buf + pos;
                   1917:        while ((ep = strchr(ep, '\\')) != NULL) {
                   1918:                if (*(++ep) == '}') {
1.197     schwarze 1919:                        *ep = '&';
1.238     schwarze 1920:                        roff_ccond(r, ln, ep - buf->buf - 1);
1.197     schwarze 1921:                }
1.247     schwarze 1922:                if (*ep != '\0')
                   1923:                        ++ep;
1.78      kristaps 1924:        }
1.277     schwarze 1925:        return rr ? ROFF_CONT : ROFF_IGN;
1.74      kristaps 1926: }
                   1927:
1.266     schwarze 1928: /* --- handling of numeric and conditional expressions -------------------- */
                   1929:
1.204     schwarze 1930: /*
                   1931:  * Parse a single signed integer number.  Stop at the first non-digit.
                   1932:  * If there is at least one digit, return success and advance the
                   1933:  * parse point, else return failure and let the parse point unchanged.
                   1934:  * Ignore overflows, treat them just like the C language.
                   1935:  */
1.184     schwarze 1936: static int
1.261     schwarze 1937: roff_getnum(const char *v, int *pos, int *res, int flags)
1.184     schwarze 1938: {
1.261     schwarze 1939:        int      myres, scaled, n, p;
1.206     schwarze 1940:
                   1941:        if (NULL == res)
                   1942:                res = &myres;
1.184     schwarze 1943:
                   1944:        p = *pos;
                   1945:        n = v[p] == '-';
1.261     schwarze 1946:        if (n || v[p] == '+')
1.184     schwarze 1947:                p++;
                   1948:
1.261     schwarze 1949:        if (flags & ROFFNUM_WHITE)
                   1950:                while (isspace((unsigned char)v[p]))
                   1951:                        p++;
                   1952:
1.184     schwarze 1953:        for (*res = 0; isdigit((unsigned char)v[p]); p++)
1.204     schwarze 1954:                *res = 10 * *res + v[p] - '0';
1.184     schwarze 1955:        if (p == *pos + n)
                   1956:                return 0;
                   1957:
                   1958:        if (n)
                   1959:                *res = -*res;
                   1960:
1.254     schwarze 1961:        /* Each number may be followed by one optional scaling unit. */
                   1962:
                   1963:        switch (v[p]) {
                   1964:        case 'f':
1.261     schwarze 1965:                scaled = *res * 65536;
1.254     schwarze 1966:                break;
                   1967:        case 'i':
1.261     schwarze 1968:                scaled = *res * 240;
1.254     schwarze 1969:                break;
                   1970:        case 'c':
1.261     schwarze 1971:                scaled = *res * 240 / 2.54;
1.254     schwarze 1972:                break;
                   1973:        case 'v':
                   1974:        case 'P':
1.261     schwarze 1975:                scaled = *res * 40;
1.254     schwarze 1976:                break;
                   1977:        case 'm':
                   1978:        case 'n':
1.261     schwarze 1979:                scaled = *res * 24;
1.254     schwarze 1980:                break;
                   1981:        case 'p':
1.261     schwarze 1982:                scaled = *res * 10 / 3;
1.254     schwarze 1983:                break;
                   1984:        case 'u':
1.261     schwarze 1985:                scaled = *res;
1.254     schwarze 1986:                break;
                   1987:        case 'M':
1.261     schwarze 1988:                scaled = *res * 6 / 25;
1.254     schwarze 1989:                break;
                   1990:        default:
1.261     schwarze 1991:                scaled = *res;
1.254     schwarze 1992:                p--;
                   1993:                break;
                   1994:        }
1.261     schwarze 1995:        if (flags & ROFFNUM_SCALE)
                   1996:                *res = scaled;
1.254     schwarze 1997:
                   1998:        *pos = p + 1;
1.277     schwarze 1999:        return 1;
1.184     schwarze 2000: }
                   2001:
1.198     schwarze 2002: /*
                   2003:  * Evaluate a string comparison condition.
                   2004:  * The first character is the delimiter.
                   2005:  * Succeed if the string up to its second occurrence
                   2006:  * matches the string up to its third occurence.
                   2007:  * Advance the cursor after the third occurrence
                   2008:  * or lacking that, to the end of the line.
                   2009:  */
                   2010: static int
                   2011: roff_evalstrcond(const char *v, int *pos)
                   2012: {
                   2013:        const char      *s1, *s2, *s3;
                   2014:        int              match;
                   2015:
                   2016:        match = 0;
                   2017:        s1 = v + *pos;          /* initial delimiter */
                   2018:        s2 = s1 + 1;            /* for scanning the first string */
                   2019:        s3 = strchr(s2, *s1);   /* for scanning the second string */
                   2020:
                   2021:        if (NULL == s3)         /* found no middle delimiter */
                   2022:                goto out;
                   2023:
                   2024:        while ('\0' != *++s3) {
                   2025:                if (*s2 != *s3) {  /* mismatch */
                   2026:                        s3 = strchr(s3, *s1);
                   2027:                        break;
                   2028:                }
                   2029:                if (*s3 == *s1) {  /* found the final delimiter */
                   2030:                        match = 1;
                   2031:                        break;
                   2032:                }
                   2033:                s2++;
                   2034:        }
                   2035:
                   2036: out:
                   2037:        if (NULL == s3)
                   2038:                s3 = strchr(s2, '\0');
1.242     schwarze 2039:        else if (*s3 != '\0')
1.198     schwarze 2040:                s3++;
                   2041:        *pos = s3 - v;
1.277     schwarze 2042:        return match;
1.198     schwarze 2043: }
                   2044:
1.204     schwarze 2045: /*
                   2046:  * Evaluate an optionally negated single character, numerical,
                   2047:  * or string condition.
                   2048:  */
1.198     schwarze 2049: static int
1.271     schwarze 2050: roff_evalcond(struct roff *r, int ln, char *v, int *pos)
1.88      kristaps 2051: {
1.271     schwarze 2052:        char    *cp, *name;
                   2053:        size_t   sz;
1.241     schwarze 2054:        int      number, savepos, wanttrue;
1.88      kristaps 2055:
1.198     schwarze 2056:        if ('!' == v[*pos]) {
                   2057:                wanttrue = 0;
                   2058:                (*pos)++;
                   2059:        } else
                   2060:                wanttrue = 1;
                   2061:
1.88      kristaps 2062:        switch (v[*pos]) {
1.240     schwarze 2063:        case '\0':
1.277     schwarze 2064:                return 0;
1.207     schwarze 2065:        case 'n':
                   2066:        case 'o':
1.88      kristaps 2067:                (*pos)++;
1.277     schwarze 2068:                return wanttrue;
1.207     schwarze 2069:        case 'c':
                   2070:        case 'd':
                   2071:        case 'e':
                   2072:        case 't':
1.239     schwarze 2073:        case 'v':
1.88      kristaps 2074:                (*pos)++;
1.277     schwarze 2075:                return !wanttrue;
1.271     schwarze 2076:        case 'r':
                   2077:                cp = name = v + ++*pos;
                   2078:                sz = roff_getname(r, &cp, ln, *pos);
                   2079:                *pos = cp - v;
1.277     schwarze 2080:                return (sz && roff_hasregn(r, name, sz)) == wanttrue;
1.88      kristaps 2081:        default:
                   2082:                break;
                   2083:        }
                   2084:
1.241     schwarze 2085:        savepos = *pos;
1.261     schwarze 2086:        if (roff_evalnum(r, ln, v, pos, &number, ROFFNUM_SCALE))
1.277     schwarze 2087:                return (number > 0) == wanttrue;
1.241     schwarze 2088:        else if (*pos == savepos)
1.277     schwarze 2089:                return roff_evalstrcond(v, pos) == wanttrue;
1.204     schwarze 2090:        else
1.277     schwarze 2091:                return 0;
1.88      kristaps 2092: }
                   2093:
1.74      kristaps 2094: static enum rofferr
1.103     kristaps 2095: roff_line_ignore(ROFF_ARGS)
1.89      kristaps 2096: {
1.123     schwarze 2097:
1.277     schwarze 2098:        return ROFF_IGN;
1.89      kristaps 2099: }
                   2100:
1.104     kristaps 2101: static enum rofferr
1.251     schwarze 2102: roff_insec(ROFF_ARGS)
                   2103: {
                   2104:
                   2105:        mandoc_msg(MANDOCERR_REQ_INSEC, r->parse,
1.295     schwarze 2106:            ln, ppos, roff_name[tok]);
1.277     schwarze 2107:        return ROFF_IGN;
1.251     schwarze 2108: }
                   2109:
                   2110: static enum rofferr
                   2111: roff_unsupp(ROFF_ARGS)
                   2112: {
                   2113:
                   2114:        mandoc_msg(MANDOCERR_REQ_UNSUPP, r->parse,
1.295     schwarze 2115:            ln, ppos, roff_name[tok]);
1.277     schwarze 2116:        return ROFF_IGN;
1.251     schwarze 2117: }
                   2118:
                   2119: static enum rofferr
1.82      kristaps 2120: roff_cond(ROFF_ARGS)
1.74      kristaps 2121: {
1.173     schwarze 2122:
                   2123:        roffnode_push(r, tok, NULL, ln, ppos);
1.74      kristaps 2124:
1.207     schwarze 2125:        /*
1.134     kristaps 2126:         * An `.el' has no conditional body: it will consume the value
                   2127:         * of the current rstack entry set in prior `ie' calls or
1.207     schwarze 2128:         * defaults to DENY.
1.134     kristaps 2129:         *
                   2130:         * If we're not an `el', however, then evaluate the conditional.
                   2131:         */
1.133     kristaps 2132:
1.238     schwarze 2133:        r->last->rule = tok == ROFF_el ?
1.207     schwarze 2134:            (r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) :
1.238     schwarze 2135:            roff_evalcond(r, ln, buf->buf, &pos);
1.77      kristaps 2136:
1.134     kristaps 2137:        /*
                   2138:         * An if-else will put the NEGATION of the current evaluated
                   2139:         * conditional into the stack of rules.
                   2140:         */
                   2141:
1.238     schwarze 2142:        if (tok == ROFF_ie) {
1.223     schwarze 2143:                if (r->rstackpos + 1 == r->rstacksz) {
                   2144:                        r->rstacksz += 16;
                   2145:                        r->rstack = mandoc_reallocarray(r->rstack,
                   2146:                            r->rstacksz, sizeof(int));
1.134     kristaps 2147:                }
1.198     schwarze 2148:                r->rstack[++r->rstackpos] = !r->last->rule;
1.82      kristaps 2149:        }
1.88      kristaps 2150:
                   2151:        /* If the parent has false as its rule, then so do we. */
                   2152:
1.198     schwarze 2153:        if (r->last->parent && !r->last->parent->rule)
                   2154:                r->last->rule = 0;
1.88      kristaps 2155:
                   2156:        /*
1.173     schwarze 2157:         * Determine scope.
                   2158:         * If there is nothing on the line after the conditional,
                   2159:         * not even whitespace, use next-line scope.
1.88      kristaps 2160:         */
1.74      kristaps 2161:
1.238     schwarze 2162:        if (buf->buf[pos] == '\0') {
1.173     schwarze 2163:                r->last->endspan = 2;
                   2164:                goto out;
                   2165:        }
                   2166:
1.238     schwarze 2167:        while (buf->buf[pos] == ' ')
1.173     schwarze 2168:                pos++;
                   2169:
                   2170:        /* An opening brace requests multiline scope. */
1.75      kristaps 2171:
1.238     schwarze 2172:        if (buf->buf[pos] == '\\' && buf->buf[pos + 1] == '{') {
1.75      kristaps 2173:                r->last->endspan = -1;
                   2174:                pos += 2;
1.272     schwarze 2175:                while (buf->buf[pos] == ' ')
                   2176:                        pos++;
1.173     schwarze 2177:                goto out;
1.207     schwarze 2178:        }
1.74      kristaps 2179:
1.77      kristaps 2180:        /*
1.173     schwarze 2181:         * Anything else following the conditional causes
                   2182:         * single-line scope.  Warn if the scope contains
                   2183:         * nothing but trailing whitespace.
1.77      kristaps 2184:         */
                   2185:
1.238     schwarze 2186:        if (buf->buf[pos] == '\0')
1.216     schwarze 2187:                mandoc_msg(MANDOCERR_COND_EMPTY, r->parse,
1.295     schwarze 2188:                    ln, ppos, roff_name[tok]);
1.77      kristaps 2189:
1.173     schwarze 2190:        r->last->endspan = 1;
1.74      kristaps 2191:
1.173     schwarze 2192: out:
1.75      kristaps 2193:        *offs = pos;
1.277     schwarze 2194:        return ROFF_RERUN;
1.83      schwarze 2195: }
                   2196:
                   2197: static enum rofferr
1.92      schwarze 2198: roff_ds(ROFF_ARGS)
                   2199: {
1.212     schwarze 2200:        char            *string;
                   2201:        const char      *name;
                   2202:        size_t           namesz;
1.96      kristaps 2203:
1.251     schwarze 2204:        /* Ignore groff compatibility mode for now. */
                   2205:
                   2206:        if (tok == ROFF_ds1)
                   2207:                tok = ROFF_ds;
                   2208:        else if (tok == ROFF_as1)
                   2209:                tok = ROFF_as;
                   2210:
1.96      kristaps 2211:        /*
1.212     schwarze 2212:         * The first word is the name of the string.
                   2213:         * If it is empty or terminated by an escape sequence,
                   2214:         * abort the `ds' request without defining anything.
1.96      kristaps 2215:         */
1.92      schwarze 2216:
1.238     schwarze 2217:        name = string = buf->buf + pos;
                   2218:        if (*name == '\0')
1.277     schwarze 2219:                return ROFF_IGN;
1.92      schwarze 2220:
1.212     schwarze 2221:        namesz = roff_getname(r, &string, ln, pos);
1.238     schwarze 2222:        if (name[namesz] == '\\')
1.277     schwarze 2223:                return ROFF_IGN;
1.212     schwarze 2224:
                   2225:        /* Read past the initial double-quote, if any. */
1.238     schwarze 2226:        if (*string == '"')
1.92      schwarze 2227:                string++;
                   2228:
1.96      kristaps 2229:        /* The rest is the value. */
1.212     schwarze 2230:        roff_setstrn(&r->strtab, name, namesz, string, strlen(string),
                   2231:            ROFF_as == tok);
1.277     schwarze 2232:        return ROFF_IGN;
1.92      schwarze 2233: }
                   2234:
1.204     schwarze 2235: /*
                   2236:  * Parse a single operator, one or two characters long.
                   2237:  * If the operator is recognized, return success and advance the
                   2238:  * parse point, else return failure and let the parse point unchanged.
                   2239:  */
                   2240: static int
                   2241: roff_getop(const char *v, int *pos, char *res)
                   2242: {
                   2243:
                   2244:        *res = v[*pos];
                   2245:
                   2246:        switch (*res) {
1.207     schwarze 2247:        case '+':
                   2248:        case '-':
                   2249:        case '*':
                   2250:        case '/':
                   2251:        case '%':
                   2252:        case '&':
                   2253:        case ':':
1.204     schwarze 2254:                break;
                   2255:        case '<':
                   2256:                switch (v[*pos + 1]) {
1.207     schwarze 2257:                case '=':
1.204     schwarze 2258:                        *res = 'l';
                   2259:                        (*pos)++;
                   2260:                        break;
1.207     schwarze 2261:                case '>':
1.204     schwarze 2262:                        *res = '!';
                   2263:                        (*pos)++;
                   2264:                        break;
1.207     schwarze 2265:                case '?':
1.204     schwarze 2266:                        *res = 'i';
                   2267:                        (*pos)++;
                   2268:                        break;
                   2269:                default:
                   2270:                        break;
                   2271:                }
                   2272:                break;
                   2273:        case '>':
                   2274:                switch (v[*pos + 1]) {
1.207     schwarze 2275:                case '=':
1.204     schwarze 2276:                        *res = 'g';
                   2277:                        (*pos)++;
                   2278:                        break;
1.207     schwarze 2279:                case '?':
1.204     schwarze 2280:                        *res = 'a';
                   2281:                        (*pos)++;
                   2282:                        break;
                   2283:                default:
                   2284:                        break;
                   2285:                }
                   2286:                break;
                   2287:        case '=':
                   2288:                if ('=' == v[*pos + 1])
                   2289:                        (*pos)++;
                   2290:                break;
                   2291:        default:
1.277     schwarze 2292:                return 0;
1.204     schwarze 2293:        }
                   2294:        (*pos)++;
                   2295:
1.277     schwarze 2296:        return *res;
1.204     schwarze 2297: }
                   2298:
                   2299: /*
                   2300:  * Evaluate either a parenthesized numeric expression
                   2301:  * or a single signed integer number.
                   2302:  */
                   2303: static int
1.235     schwarze 2304: roff_evalpar(struct roff *r, int ln,
1.261     schwarze 2305:        const char *v, int *pos, int *res, int flags)
1.204     schwarze 2306: {
                   2307:
                   2308:        if ('(' != v[*pos])
1.277     schwarze 2309:                return roff_getnum(v, pos, res, flags);
1.204     schwarze 2310:
                   2311:        (*pos)++;
1.261     schwarze 2312:        if ( ! roff_evalnum(r, ln, v, pos, res, flags | ROFFNUM_WHITE))
1.277     schwarze 2313:                return 0;
1.204     schwarze 2314:
1.206     schwarze 2315:        /*
                   2316:         * Omission of the closing parenthesis
                   2317:         * is an error in validation mode,
                   2318:         * but ignored in evaluation mode.
                   2319:         */
                   2320:
1.204     schwarze 2321:        if (')' == v[*pos])
                   2322:                (*pos)++;
1.206     schwarze 2323:        else if (NULL == res)
1.277     schwarze 2324:                return 0;
1.204     schwarze 2325:
1.277     schwarze 2326:        return 1;
1.204     schwarze 2327: }
                   2328:
                   2329: /*
                   2330:  * Evaluate a complete numeric expression.
                   2331:  * Proceed left to right, there is no concept of precedence.
                   2332:  */
                   2333: static int
1.235     schwarze 2334: roff_evalnum(struct roff *r, int ln, const char *v,
1.261     schwarze 2335:        int *pos, int *res, int flags)
1.204     schwarze 2336: {
                   2337:        int              mypos, operand2;
                   2338:        char             operator;
                   2339:
                   2340:        if (NULL == pos) {
                   2341:                mypos = 0;
                   2342:                pos = &mypos;
                   2343:        }
                   2344:
1.261     schwarze 2345:        if (flags & ROFFNUM_WHITE)
1.204     schwarze 2346:                while (isspace((unsigned char)v[*pos]))
                   2347:                        (*pos)++;
                   2348:
1.261     schwarze 2349:        if ( ! roff_evalpar(r, ln, v, pos, res, flags))
1.277     schwarze 2350:                return 0;
1.204     schwarze 2351:
                   2352:        while (1) {
1.261     schwarze 2353:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2354:                        while (isspace((unsigned char)v[*pos]))
                   2355:                                (*pos)++;
                   2356:
                   2357:                if ( ! roff_getop(v, pos, &operator))
                   2358:                        break;
                   2359:
1.261     schwarze 2360:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2361:                        while (isspace((unsigned char)v[*pos]))
                   2362:                                (*pos)++;
                   2363:
1.261     schwarze 2364:                if ( ! roff_evalpar(r, ln, v, pos, &operand2, flags))
1.277     schwarze 2365:                        return 0;
1.204     schwarze 2366:
1.261     schwarze 2367:                if (flags & ROFFNUM_WHITE)
1.204     schwarze 2368:                        while (isspace((unsigned char)v[*pos]))
                   2369:                                (*pos)++;
1.206     schwarze 2370:
                   2371:                if (NULL == res)
                   2372:                        continue;
1.204     schwarze 2373:
                   2374:                switch (operator) {
1.207     schwarze 2375:                case '+':
1.204     schwarze 2376:                        *res += operand2;
                   2377:                        break;
1.207     schwarze 2378:                case '-':
1.204     schwarze 2379:                        *res -= operand2;
                   2380:                        break;
1.207     schwarze 2381:                case '*':
1.204     schwarze 2382:                        *res *= operand2;
                   2383:                        break;
1.207     schwarze 2384:                case '/':
1.244     schwarze 2385:                        if (operand2 == 0) {
1.235     schwarze 2386:                                mandoc_msg(MANDOCERR_DIVZERO,
1.234     kristaps 2387:                                        r->parse, ln, *pos, v);
                   2388:                                *res = 0;
                   2389:                                break;
                   2390:                        }
1.204     schwarze 2391:                        *res /= operand2;
                   2392:                        break;
1.207     schwarze 2393:                case '%':
1.244     schwarze 2394:                        if (operand2 == 0) {
                   2395:                                mandoc_msg(MANDOCERR_DIVZERO,
                   2396:                                        r->parse, ln, *pos, v);
                   2397:                                *res = 0;
                   2398:                                break;
                   2399:                        }
1.204     schwarze 2400:                        *res %= operand2;
                   2401:                        break;
1.207     schwarze 2402:                case '<':
1.204     schwarze 2403:                        *res = *res < operand2;
                   2404:                        break;
1.207     schwarze 2405:                case '>':
1.204     schwarze 2406:                        *res = *res > operand2;
                   2407:                        break;
1.207     schwarze 2408:                case 'l':
1.204     schwarze 2409:                        *res = *res <= operand2;
                   2410:                        break;
1.207     schwarze 2411:                case 'g':
1.204     schwarze 2412:                        *res = *res >= operand2;
                   2413:                        break;
1.207     schwarze 2414:                case '=':
1.204     schwarze 2415:                        *res = *res == operand2;
                   2416:                        break;
1.207     schwarze 2417:                case '!':
1.204     schwarze 2418:                        *res = *res != operand2;
                   2419:                        break;
1.207     schwarze 2420:                case '&':
1.204     schwarze 2421:                        *res = *res && operand2;
                   2422:                        break;
1.207     schwarze 2423:                case ':':
1.204     schwarze 2424:                        *res = *res || operand2;
                   2425:                        break;
1.207     schwarze 2426:                case 'i':
1.204     schwarze 2427:                        if (operand2 < *res)
                   2428:                                *res = operand2;
                   2429:                        break;
1.207     schwarze 2430:                case 'a':
1.204     schwarze 2431:                        if (operand2 > *res)
                   2432:                                *res = operand2;
                   2433:                        break;
                   2434:                default:
                   2435:                        abort();
                   2436:                }
                   2437:        }
1.277     schwarze 2438:        return 1;
1.204     schwarze 2439: }
                   2440:
1.266     schwarze 2441: /* --- register management ------------------------------------------------ */
                   2442:
1.180     schwarze 2443: void
1.187     schwarze 2444: roff_setreg(struct roff *r, const char *name, int val, char sign)
1.147     kristaps 2445: {
1.180     schwarze 2446:        struct roffreg  *reg;
                   2447:
                   2448:        /* Search for an existing register with the same name. */
                   2449:        reg = r->regtab;
                   2450:
                   2451:        while (reg && strcmp(name, reg->key.p))
                   2452:                reg = reg->next;
1.147     kristaps 2453:
1.180     schwarze 2454:        if (NULL == reg) {
                   2455:                /* Create a new register. */
                   2456:                reg = mandoc_malloc(sizeof(struct roffreg));
                   2457:                reg->key.p = mandoc_strdup(name);
                   2458:                reg->key.sz = strlen(name);
1.187     schwarze 2459:                reg->val = 0;
1.180     schwarze 2460:                reg->next = r->regtab;
                   2461:                r->regtab = reg;
                   2462:        }
                   2463:
1.187     schwarze 2464:        if ('+' == sign)
                   2465:                reg->val += val;
                   2466:        else if ('-' == sign)
                   2467:                reg->val -= val;
                   2468:        else
                   2469:                reg->val = val;
1.147     kristaps 2470: }
                   2471:
1.192     schwarze 2472: /*
                   2473:  * Handle some predefined read-only number registers.
                   2474:  * For now, return -1 if the requested register is not predefined;
                   2475:  * in case a predefined read-only register having the value -1
                   2476:  * were to turn up, another special value would have to be chosen.
                   2477:  */
                   2478: static int
1.273     schwarze 2479: roff_getregro(const struct roff *r, const char *name)
1.192     schwarze 2480: {
                   2481:
                   2482:        switch (*name) {
1.273     schwarze 2483:        case '$':  /* Number of arguments of the last macro evaluated. */
1.277     schwarze 2484:                return r->argc;
1.207     schwarze 2485:        case 'A':  /* ASCII approximation mode is always off. */
1.277     schwarze 2486:                return 0;
1.207     schwarze 2487:        case 'g':  /* Groff compatibility mode is always on. */
1.277     schwarze 2488:                return 1;
1.207     schwarze 2489:        case 'H':  /* Fixed horizontal resolution. */
1.277     schwarze 2490:                return 24;
1.207     schwarze 2491:        case 'j':  /* Always adjust left margin only. */
1.277     schwarze 2492:                return 0;
1.207     schwarze 2493:        case 'T':  /* Some output device is always defined. */
1.277     schwarze 2494:                return 1;
1.207     schwarze 2495:        case 'V':  /* Fixed vertical resolution. */
1.277     schwarze 2496:                return 40;
1.192     schwarze 2497:        default:
1.277     schwarze 2498:                return -1;
1.192     schwarze 2499:        }
                   2500: }
                   2501:
1.181     schwarze 2502: int
1.180     schwarze 2503: roff_getreg(const struct roff *r, const char *name)
1.147     kristaps 2504: {
1.180     schwarze 2505:        struct roffreg  *reg;
1.192     schwarze 2506:        int              val;
                   2507:
                   2508:        if ('.' == name[0] && '\0' != name[1] && '\0' == name[2]) {
1.273     schwarze 2509:                val = roff_getregro(r, name + 1);
1.192     schwarze 2510:                if (-1 != val)
1.277     schwarze 2511:                        return val;
1.192     schwarze 2512:        }
1.180     schwarze 2513:
                   2514:        for (reg = r->regtab; reg; reg = reg->next)
                   2515:                if (0 == strcmp(name, reg->key.p))
1.277     schwarze 2516:                        return reg->val;
1.181     schwarze 2517:
1.277     schwarze 2518:        return 0;
1.181     schwarze 2519: }
                   2520:
                   2521: static int
                   2522: roff_getregn(const struct roff *r, const char *name, size_t len)
                   2523: {
                   2524:        struct roffreg  *reg;
1.192     schwarze 2525:        int              val;
                   2526:
                   2527:        if ('.' == name[0] && 2 == len) {
1.273     schwarze 2528:                val = roff_getregro(r, name + 1);
1.192     schwarze 2529:                if (-1 != val)
1.277     schwarze 2530:                        return val;
1.192     schwarze 2531:        }
1.181     schwarze 2532:
                   2533:        for (reg = r->regtab; reg; reg = reg->next)
                   2534:                if (len == reg->key.sz &&
                   2535:                    0 == strncmp(name, reg->key.p, len))
1.277     schwarze 2536:                        return reg->val;
1.271     schwarze 2537:
1.277     schwarze 2538:        return 0;
1.271     schwarze 2539: }
                   2540:
                   2541: static int
                   2542: roff_hasregn(const struct roff *r, const char *name, size_t len)
                   2543: {
                   2544:        struct roffreg  *reg;
                   2545:        int              val;
                   2546:
                   2547:        if ('.' == name[0] && 2 == len) {
1.273     schwarze 2548:                val = roff_getregro(r, name + 1);
1.271     schwarze 2549:                if (-1 != val)
1.277     schwarze 2550:                        return 1;
1.271     schwarze 2551:        }
                   2552:
                   2553:        for (reg = r->regtab; reg; reg = reg->next)
                   2554:                if (len == reg->key.sz &&
                   2555:                    0 == strncmp(name, reg->key.p, len))
1.277     schwarze 2556:                        return 1;
1.147     kristaps 2557:
1.277     schwarze 2558:        return 0;
1.147     kristaps 2559: }
                   2560:
1.180     schwarze 2561: static void
                   2562: roff_freereg(struct roffreg *reg)
1.147     kristaps 2563: {
1.180     schwarze 2564:        struct roffreg  *old_reg;
1.147     kristaps 2565:
1.180     schwarze 2566:        while (NULL != reg) {
                   2567:                free(reg->key.p);
                   2568:                old_reg = reg;
                   2569:                reg = reg->next;
                   2570:                free(old_reg);
                   2571:        }
1.147     kristaps 2572: }
1.92      schwarze 2573:
                   2574: static enum rofferr
1.89      kristaps 2575: roff_nr(ROFF_ARGS)
1.83      schwarze 2576: {
1.212     schwarze 2577:        char            *key, *val;
                   2578:        size_t           keysz;
1.138     kristaps 2579:        int              iv;
1.187     schwarze 2580:        char             sign;
1.89      kristaps 2581:
1.238     schwarze 2582:        key = val = buf->buf + pos;
                   2583:        if (*key == '\0')
1.277     schwarze 2584:                return ROFF_IGN;
1.212     schwarze 2585:
                   2586:        keysz = roff_getname(r, &val, ln, pos);
1.238     schwarze 2587:        if (key[keysz] == '\\')
1.277     schwarze 2588:                return ROFF_IGN;
1.212     schwarze 2589:        key[keysz] = '\0';
1.89      kristaps 2590:
1.187     schwarze 2591:        sign = *val;
1.238     schwarze 2592:        if (sign == '+' || sign == '-')
1.187     schwarze 2593:                val++;
                   2594:
1.261     schwarze 2595:        if (roff_evalnum(r, ln, val, NULL, &iv, ROFFNUM_SCALE))
1.204     schwarze 2596:                roff_setreg(r, key, iv, sign);
1.109     kristaps 2597:
1.277     schwarze 2598:        return ROFF_IGN;
1.203     schwarze 2599: }
                   2600:
                   2601: static enum rofferr
                   2602: roff_rr(ROFF_ARGS)
                   2603: {
                   2604:        struct roffreg  *reg, **prev;
1.212     schwarze 2605:        char            *name, *cp;
                   2606:        size_t           namesz;
1.203     schwarze 2607:
1.238     schwarze 2608:        name = cp = buf->buf + pos;
                   2609:        if (*name == '\0')
1.277     schwarze 2610:                return ROFF_IGN;
1.212     schwarze 2611:        namesz = roff_getname(r, &cp, ln, pos);
                   2612:        name[namesz] = '\0';
1.203     schwarze 2613:
                   2614:        prev = &r->regtab;
                   2615:        while (1) {
                   2616:                reg = *prev;
1.238     schwarze 2617:                if (reg == NULL || !strcmp(name, reg->key.p))
1.203     schwarze 2618:                        break;
                   2619:                prev = &reg->next;
                   2620:        }
1.238     schwarze 2621:        if (reg != NULL) {
1.203     schwarze 2622:                *prev = reg->next;
                   2623:                free(reg->key.p);
                   2624:                free(reg);
                   2625:        }
1.277     schwarze 2626:        return ROFF_IGN;
1.122     schwarze 2627: }
                   2628:
1.266     schwarze 2629: /* --- handler functions for roff requests -------------------------------- */
                   2630:
1.122     schwarze 2631: static enum rofferr
                   2632: roff_rm(ROFF_ARGS)
                   2633: {
                   2634:        const char       *name;
                   2635:        char             *cp;
1.212     schwarze 2636:        size_t            namesz;
1.122     schwarze 2637:
1.238     schwarze 2638:        cp = buf->buf + pos;
                   2639:        while (*cp != '\0') {
1.212     schwarze 2640:                name = cp;
1.238     schwarze 2641:                namesz = roff_getname(r, &cp, ln, (int)(cp - buf->buf));
1.212     schwarze 2642:                roff_setstrn(&r->strtab, name, namesz, NULL, 0, 0);
1.238     schwarze 2643:                if (name[namesz] == '\\')
1.212     schwarze 2644:                        break;
1.122     schwarze 2645:        }
1.277     schwarze 2646:        return ROFF_IGN;
1.178     schwarze 2647: }
                   2648:
                   2649: static enum rofferr
                   2650: roff_it(ROFF_ARGS)
                   2651: {
                   2652:        int              iv;
                   2653:
                   2654:        /* Parse the number of lines. */
1.261     schwarze 2655:
                   2656:        if ( ! roff_evalnum(r, ln, buf->buf, &pos, &iv, 0)) {
1.222     schwarze 2657:                mandoc_msg(MANDOCERR_IT_NONUM, r->parse,
1.238     schwarze 2658:                    ln, ppos, buf->buf + 1);
1.277     schwarze 2659:                return ROFF_IGN;
1.178     schwarze 2660:        }
                   2661:
1.262     schwarze 2662:        while (isspace((unsigned char)buf->buf[pos]))
                   2663:                pos++;
                   2664:
                   2665:        /*
                   2666:         * Arm the input line trap.
                   2667:         * Special-casing "an-trap" is an ugly workaround to cope
                   2668:         * with DocBook stupidly fiddling with man(7) internals.
                   2669:         */
1.261     schwarze 2670:
1.178     schwarze 2671:        roffit_lines = iv;
1.262     schwarze 2672:        roffit_macro = mandoc_strdup(iv != 1 ||
                   2673:            strcmp(buf->buf + pos, "an-trap") ?
                   2674:            buf->buf + pos : "br");
1.277     schwarze 2675:        return ROFF_IGN;
1.175     schwarze 2676: }
                   2677:
                   2678: static enum rofferr
                   2679: roff_Dd(ROFF_ARGS)
                   2680: {
                   2681:        const char *const       *cp;
                   2682:
1.227     schwarze 2683:        if ((r->options & (MPARSE_MDOC | MPARSE_QUICK)) == 0)
1.175     schwarze 2684:                for (cp = __mdoc_reserved; *cp; cp++)
                   2685:                        roff_setstr(r, *cp, NULL, 0);
                   2686:
1.227     schwarze 2687:        if (r->format == 0)
                   2688:                r->format = MPARSE_MDOC;
                   2689:
1.277     schwarze 2690:        return ROFF_CONT;
1.175     schwarze 2691: }
                   2692:
                   2693: static enum rofferr
                   2694: roff_TH(ROFF_ARGS)
                   2695: {
                   2696:        const char *const       *cp;
                   2697:
1.227     schwarze 2698:        if ((r->options & MPARSE_QUICK) == 0)
1.175     schwarze 2699:                for (cp = __man_reserved; *cp; cp++)
                   2700:                        roff_setstr(r, *cp, NULL, 0);
                   2701:
1.227     schwarze 2702:        if (r->format == 0)
                   2703:                r->format = MPARSE_MAN;
                   2704:
1.277     schwarze 2705:        return ROFF_CONT;
1.109     kristaps 2706: }
                   2707:
                   2708: static enum rofferr
                   2709: roff_TE(ROFF_ARGS)
                   2710: {
                   2711:
                   2712:        if (NULL == r->tbl)
1.221     schwarze 2713:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   2714:                    ln, ppos, "TE");
1.258     schwarze 2715:        else if ( ! tbl_end(&r->tbl)) {
                   2716:                free(buf->buf);
                   2717:                buf->buf = mandoc_strdup(".sp");
                   2718:                buf->sz = 4;
1.277     schwarze 2719:                return ROFF_REPARSE;
1.258     schwarze 2720:        }
1.277     schwarze 2721:        return ROFF_IGN;
1.112     kristaps 2722: }
                   2723:
                   2724: static enum rofferr
                   2725: roff_T_(ROFF_ARGS)
                   2726: {
                   2727:
                   2728:        if (NULL == r->tbl)
1.221     schwarze 2729:                mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
                   2730:                    ln, ppos, "T&");
1.112     kristaps 2731:        else
1.296     schwarze 2732:                tbl_restart(ln, ppos, r->tbl);
1.112     kristaps 2733:
1.277     schwarze 2734:        return ROFF_IGN;
1.109     kristaps 2735: }
                   2736:
1.230     schwarze 2737: /*
                   2738:  * Handle in-line equation delimiters.
                   2739:  */
                   2740: static enum rofferr
1.238     schwarze 2741: roff_eqndelim(struct roff *r, struct buf *buf, int pos)
1.151     kristaps 2742: {
1.233     schwarze 2743:        char            *cp1, *cp2;
                   2744:        const char      *bef_pr, *bef_nl, *mac, *aft_nl, *aft_pr;
1.151     kristaps 2745:
1.230     schwarze 2746:        /*
                   2747:         * Outside equations, look for an opening delimiter.
                   2748:         * If we are inside an equation, we already know it is
                   2749:         * in-line, or this function wouldn't have been called;
                   2750:         * so look for a closing delimiter.
                   2751:         */
                   2752:
1.238     schwarze 2753:        cp1 = buf->buf + pos;
1.230     schwarze 2754:        cp2 = strchr(cp1, r->eqn == NULL ?
                   2755:            r->last_eqn->odelim : r->last_eqn->cdelim);
                   2756:        if (cp2 == NULL)
1.277     schwarze 2757:                return ROFF_CONT;
1.230     schwarze 2758:
1.233     schwarze 2759:        *cp2++ = '\0';
                   2760:        bef_pr = bef_nl = aft_nl = aft_pr = "";
                   2761:
                   2762:        /* Handle preceding text, protecting whitespace. */
                   2763:
1.238     schwarze 2764:        if (*buf->buf != '\0') {
1.233     schwarze 2765:                if (r->eqn == NULL)
                   2766:                        bef_pr = "\\&";
                   2767:                bef_nl = "\n";
                   2768:        }
                   2769:
                   2770:        /*
                   2771:         * Prepare replacing the delimiter with an equation macro
                   2772:         * and drop leading white space from the equation.
                   2773:         */
1.230     schwarze 2774:
1.233     schwarze 2775:        if (r->eqn == NULL) {
                   2776:                while (*cp2 == ' ')
                   2777:                        cp2++;
                   2778:                mac = ".EQ";
                   2779:        } else
                   2780:                mac = ".EN";
                   2781:
                   2782:        /* Handle following text, protecting whitespace. */
                   2783:
                   2784:        if (*cp2 != '\0') {
                   2785:                aft_nl = "\n";
                   2786:                if (r->eqn != NULL)
                   2787:                        aft_pr = "\\&";
                   2788:        }
                   2789:
                   2790:        /* Do the actual replacement. */
                   2791:
1.238     schwarze 2792:        buf->sz = mandoc_asprintf(&cp1, "%s%s%s%s%s%s%s", buf->buf,
1.233     schwarze 2793:            bef_pr, bef_nl, mac, aft_nl, aft_pr, cp2) + 1;
1.238     schwarze 2794:        free(buf->buf);
                   2795:        buf->buf = cp1;
1.230     schwarze 2796:
                   2797:        /* Toggle the in-line state of the eqn subsystem. */
                   2798:
                   2799:        r->eqn_inline = r->eqn == NULL;
1.277     schwarze 2800:        return ROFF_REPARSE;
1.151     kristaps 2801: }
                   2802:
1.235     schwarze 2803: static enum rofferr
                   2804: roff_EQ(ROFF_ARGS)
1.125     kristaps 2805: {
1.151     kristaps 2806:        struct eqn_node *e;
1.125     kristaps 2807:
1.238     schwarze 2808:        assert(r->eqn == NULL);
1.235     schwarze 2809:        e = eqn_alloc(ppos, ln, r->parse);
1.125     kristaps 2810:
1.230     schwarze 2811:        if (r->last_eqn) {
1.125     kristaps 2812:                r->last_eqn->next = e;
1.230     schwarze 2813:                e->delim = r->last_eqn->delim;
                   2814:                e->odelim = r->last_eqn->odelim;
                   2815:                e->cdelim = r->last_eqn->cdelim;
                   2816:        } else
1.125     kristaps 2817:                r->first_eqn = r->last_eqn = e;
                   2818:
                   2819:        r->eqn = r->last_eqn = e;
1.151     kristaps 2820:
1.238     schwarze 2821:        if (buf->buf[pos] != '\0')
1.235     schwarze 2822:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.238     schwarze 2823:                    ".EQ %s", buf->buf + pos);
1.151     kristaps 2824:
1.277     schwarze 2825:        return ROFF_IGN;
1.125     kristaps 2826: }
                   2827:
                   2828: static enum rofferr
                   2829: roff_EN(ROFF_ARGS)
                   2830: {
                   2831:
1.221     schwarze 2832:        mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse, ln, ppos, "EN");
1.277     schwarze 2833:        return ROFF_IGN;
1.125     kristaps 2834: }
                   2835:
                   2836: static enum rofferr
1.109     kristaps 2837: roff_TS(ROFF_ARGS)
                   2838: {
1.176     schwarze 2839:        struct tbl_node *tbl;
1.89      kristaps 2840:
1.115     kristaps 2841:        if (r->tbl) {
1.221     schwarze 2842:                mandoc_msg(MANDOCERR_BLK_BROKEN, r->parse,
                   2843:                    ln, ppos, "TS breaks TS");
1.151     kristaps 2844:                tbl_end(&r->tbl);
1.115     kristaps 2845:        }
1.83      schwarze 2846:
1.176     schwarze 2847:        tbl = tbl_alloc(ppos, ln, r->parse);
1.113     kristaps 2848:
                   2849:        if (r->last_tbl)
1.176     schwarze 2850:                r->last_tbl->next = tbl;
1.113     kristaps 2851:        else
1.176     schwarze 2852:                r->first_tbl = r->last_tbl = tbl;
1.113     kristaps 2853:
1.176     schwarze 2854:        r->tbl = r->last_tbl = tbl;
1.297     schwarze 2855:        return ROFF_IGN;
                   2856: }
                   2857:
                   2858: static enum rofferr
                   2859: roff_onearg(ROFF_ARGS)
                   2860: {
                   2861:        struct roff_node        *n;
                   2862:        char                    *cp;
1.305   ! schwarze 2863:        int                      npos;
1.297     schwarze 2864:
1.302     schwarze 2865:        if (r->man->flags & (MAN_BLINE | MAN_ELINE) &&
                   2866:            (tok == ROFF_sp || tok == ROFF_ti))
                   2867:                man_breakscope(r->man, tok);
                   2868:
1.305   ! schwarze 2869:        if (tok == ROFF_ce && roffce_node != NULL) {
        !          2870:                r->man->last = roffce_node;
        !          2871:                r->man->next = ROFF_NEXT_SIBLING;
        !          2872:        }
        !          2873:
1.297     schwarze 2874:        roff_elem_alloc(r->man, ln, ppos, tok);
                   2875:        n = r->man->last;
                   2876:
                   2877:        cp = buf->buf + pos;
                   2878:        if (*cp != '\0') {
                   2879:                while (*cp != '\0' && *cp != ' ')
                   2880:                        cp++;
                   2881:                while (*cp == ' ')
                   2882:                        *cp++ = '\0';
                   2883:                if (*cp != '\0')
                   2884:                        mandoc_vmsg(MANDOCERR_ARG_EXCESS,
                   2885:                            r->parse, ln, cp - buf->buf,
                   2886:                            "%s ... %s", roff_name[tok], cp);
                   2887:                roff_word_alloc(r->man, ln, pos, buf->buf + pos);
1.300     schwarze 2888:        }
                   2889:
1.305   ! schwarze 2890:        if (tok == ROFF_ce) {
        !          2891:                if (r->man->last->tok == ROFF_ce) {
        !          2892:                        roff_word_alloc(r->man, ln, pos, "1");
        !          2893:                        r->man->last->flags |= NODE_NOSRC;
        !          2894:                }
        !          2895:                npos = 0;
        !          2896:                if (roff_evalnum(r, ln, r->man->last->string, &npos,
        !          2897:                    &roffce_lines, 0) == 0) {
        !          2898:                        mandoc_vmsg(MANDOCERR_CE_NONUM,
        !          2899:                            r->parse, ln, pos, "ce %s", buf->buf + pos);
        !          2900:                        roffce_lines = 1;
        !          2901:                }
        !          2902:                if (roffce_lines < 1) {
        !          2903:                        r->man->last = r->man->last->parent;
        !          2904:                        roffce_node = NULL;
        !          2905:                        roffce_lines = 0;
        !          2906:                } else
        !          2907:                        roffce_node = r->man->last->parent;
        !          2908:        } else {
        !          2909:                n->flags |= NODE_VALID | NODE_ENDED;
        !          2910:                r->man->last = n;
        !          2911:        }
        !          2912:        n->flags |= NODE_LINE;
1.300     schwarze 2913:        r->man->next = ROFF_NEXT_SIBLING;
                   2914:        return ROFF_IGN;
                   2915: }
                   2916:
                   2917: static enum rofferr
                   2918: roff_manyarg(ROFF_ARGS)
                   2919: {
                   2920:        struct roff_node        *n;
                   2921:        char                    *sp, *ep;
                   2922:
                   2923:        roff_elem_alloc(r->man, ln, ppos, tok);
                   2924:        n = r->man->last;
                   2925:
                   2926:        for (sp = ep = buf->buf + pos; *sp != '\0'; sp = ep) {
                   2927:                while (*ep != '\0' && *ep != ' ')
                   2928:                        ep++;
                   2929:                while (*ep == ' ')
                   2930:                        *ep++ = '\0';
                   2931:                roff_word_alloc(r->man, ln, sp - buf->buf, sp);
1.297     schwarze 2932:        }
                   2933:
                   2934:        n->flags |= NODE_LINE | NODE_VALID | NODE_ENDED;
                   2935:        r->man->last = n;
                   2936:        r->man->next = ROFF_NEXT_SIBLING;
1.277     schwarze 2937:        return ROFF_IGN;
1.251     schwarze 2938: }
                   2939:
                   2940: static enum rofferr
1.296     schwarze 2941: roff_br(ROFF_ARGS)
1.251     schwarze 2942: {
1.302     schwarze 2943:        if (r->man->flags & (MAN_BLINE | MAN_ELINE))
                   2944:                man_breakscope(r->man, ROFF_br);
1.296     schwarze 2945:        roff_elem_alloc(r->man, ln, ppos, ROFF_br);
                   2946:        if (buf->buf[pos] != '\0')
                   2947:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
                   2948:                    "%s %s", roff_name[tok], buf->buf + pos);
                   2949:        r->man->last->flags |= NODE_LINE | NODE_VALID | NODE_ENDED;
                   2950:        r->man->next = ROFF_NEXT_SIBLING;
                   2951:        return ROFF_IGN;
1.92      schwarze 2952: }
                   2953:
1.105     kristaps 2954: static enum rofferr
1.174     kristaps 2955: roff_cc(ROFF_ARGS)
                   2956: {
                   2957:        const char      *p;
                   2958:
1.238     schwarze 2959:        p = buf->buf + pos;
1.174     kristaps 2960:
1.238     schwarze 2961:        if (*p == '\0' || (r->control = *p++) == '.')
1.303     schwarze 2962:                r->control = '\0';
1.174     kristaps 2963:
1.238     schwarze 2964:        if (*p != '\0')
1.260     schwarze 2965:                mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
                   2966:                    ln, p - buf->buf, "cc ... %s", p);
1.174     kristaps 2967:
1.277     schwarze 2968:        return ROFF_IGN;
1.174     kristaps 2969: }
                   2970:
                   2971: static enum rofferr
1.303     schwarze 2972: roff_ec(ROFF_ARGS)
                   2973: {
                   2974:        const char      *p;
                   2975:
                   2976:        p = buf->buf + pos;
                   2977:        if (*p == '\0')
                   2978:                r->escape = '\\';
                   2979:        else {
                   2980:                r->escape = *p;
                   2981:                if (*++p != '\0')
                   2982:                        mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
                   2983:                            ln, p - buf->buf, "ec ... %s", p);
                   2984:        }
                   2985:        return ROFF_IGN;
                   2986: }
                   2987:
                   2988: static enum rofferr
                   2989: roff_eo(ROFF_ARGS)
                   2990: {
                   2991:        r->escape = '\0';
                   2992:        if (buf->buf[pos] != '\0')
                   2993:                mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse,
                   2994:                    ln, pos, "eo %s", buf->buf + pos);
                   2995:        return ROFF_IGN;
                   2996: }
                   2997:
                   2998: static enum rofferr
1.164     kristaps 2999: roff_tr(ROFF_ARGS)
                   3000: {
                   3001:        const char      *p, *first, *second;
                   3002:        size_t           fsz, ssz;
                   3003:        enum mandoc_esc  esc;
                   3004:
1.238     schwarze 3005:        p = buf->buf + pos;
1.164     kristaps 3006:
1.238     schwarze 3007:        if (*p == '\0') {
1.260     schwarze 3008:                mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse, ln, ppos, "tr");
1.277     schwarze 3009:                return ROFF_IGN;
1.164     kristaps 3010:        }
                   3011:
1.238     schwarze 3012:        while (*p != '\0') {
1.164     kristaps 3013:                fsz = ssz = 1;
                   3014:
                   3015:                first = p++;
1.238     schwarze 3016:                if (*first == '\\') {
1.164     kristaps 3017:                        esc = mandoc_escape(&p, NULL, NULL);
1.238     schwarze 3018:                        if (esc == ESCAPE_ERROR) {
1.219     schwarze 3019:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 3020:                                    ln, (int)(p - buf->buf), first);
1.277     schwarze 3021:                                return ROFF_IGN;
1.164     kristaps 3022:                        }
                   3023:                        fsz = (size_t)(p - first);
                   3024:                }
                   3025:
                   3026:                second = p++;
1.238     schwarze 3027:                if (*second == '\\') {
1.164     kristaps 3028:                        esc = mandoc_escape(&p, NULL, NULL);
1.238     schwarze 3029:                        if (esc == ESCAPE_ERROR) {
1.219     schwarze 3030:                                mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.238     schwarze 3031:                                    ln, (int)(p - buf->buf), second);
1.277     schwarze 3032:                                return ROFF_IGN;
1.164     kristaps 3033:                        }
                   3034:                        ssz = (size_t)(p - second);
1.238     schwarze 3035:                } else if (*second == '\0') {
1.260     schwarze 3036:                        mandoc_vmsg(MANDOCERR_TR_ODD, r->parse,
                   3037:                            ln, first - buf->buf, "tr %s", first);
1.164     kristaps 3038:                        second = " ";
1.165     kristaps 3039:                        p--;
1.164     kristaps 3040:                }
                   3041:
1.167     kristaps 3042:                if (fsz > 1) {
1.207     schwarze 3043:                        roff_setstrn(&r->xmbtab, first, fsz,
                   3044:                            second, ssz, 0);
1.167     kristaps 3045:                        continue;
                   3046:                }
                   3047:
1.238     schwarze 3048:                if (r->xtab == NULL)
1.207     schwarze 3049:                        r->xtab = mandoc_calloc(128,
                   3050:                            sizeof(struct roffstr));
1.167     kristaps 3051:
                   3052:                free(r->xtab[(int)*first].p);
                   3053:                r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
                   3054:                r->xtab[(int)*first].sz = ssz;
1.164     kristaps 3055:        }
                   3056:
1.277     schwarze 3057:        return ROFF_IGN;
1.164     kristaps 3058: }
                   3059:
                   3060: static enum rofferr
1.105     kristaps 3061: roff_so(ROFF_ARGS)
                   3062: {
1.249     schwarze 3063:        char *name, *cp;
1.105     kristaps 3064:
1.238     schwarze 3065:        name = buf->buf + pos;
1.224     schwarze 3066:        mandoc_vmsg(MANDOCERR_SO, r->parse, ln, ppos, "so %s", name);
1.105     kristaps 3067:
                   3068:        /*
                   3069:         * Handle `so'.  Be EXTREMELY careful, as we shouldn't be
                   3070:         * opening anything that's not in our cwd or anything beneath
                   3071:         * it.  Thus, explicitly disallow traversing up the file-system
                   3072:         * or using absolute paths.
                   3073:         */
                   3074:
1.238     schwarze 3075:        if (*name == '/' || strstr(name, "../") || strstr(name, "/..")) {
1.210     schwarze 3076:                mandoc_vmsg(MANDOCERR_SO_PATH, r->parse, ln, ppos,
                   3077:                    ".so %s", name);
1.249     schwarze 3078:                buf->sz = mandoc_asprintf(&cp,
                   3079:                    ".sp\nSee the file %s.\n.sp", name) + 1;
                   3080:                free(buf->buf);
                   3081:                buf->buf = cp;
                   3082:                *offs = 0;
1.277     schwarze 3083:                return ROFF_REPARSE;
1.105     kristaps 3084:        }
                   3085:
                   3086:        *offs = pos;
1.277     schwarze 3087:        return ROFF_SO;
1.105     kristaps 3088: }
1.92      schwarze 3089:
1.266     schwarze 3090: /* --- user defined strings and macros ------------------------------------ */
                   3091:
1.106     kristaps 3092: static enum rofferr
                   3093: roff_userdef(ROFF_ARGS)
1.99      kristaps 3094: {
1.263     schwarze 3095:        const char       *arg[9], *ap;
1.106     kristaps 3096:        char             *cp, *n1, *n2;
1.292     schwarze 3097:        int               expand_count, i, ib, ie;
1.263     schwarze 3098:        size_t            asz, rsz;
1.106     kristaps 3099:
                   3100:        /*
                   3101:         * Collect pointers to macro argument strings
1.188     schwarze 3102:         * and NUL-terminate them.
1.106     kristaps 3103:         */
1.263     schwarze 3104:
1.273     schwarze 3105:        r->argc = 0;
1.238     schwarze 3106:        cp = buf->buf + pos;
1.273     schwarze 3107:        for (i = 0; i < 9; i++) {
                   3108:                if (*cp == '\0')
                   3109:                        arg[i] = "";
                   3110:                else {
                   3111:                        arg[i] = mandoc_getarg(r->parse, &cp, ln, &pos);
                   3112:                        r->argc = i + 1;
                   3113:                }
                   3114:        }
1.99      kristaps 3115:
1.106     kristaps 3116:        /*
                   3117:         * Expand macro arguments.
1.99      kristaps 3118:         */
1.263     schwarze 3119:
                   3120:        buf->sz = strlen(r->current_string) + 1;
1.292     schwarze 3121:        n1 = n2 = cp = mandoc_malloc(buf->sz);
1.263     schwarze 3122:        memcpy(n1, r->current_string, buf->sz);
1.292     schwarze 3123:        expand_count = 0;
1.263     schwarze 3124:        while (*cp != '\0') {
                   3125:
                   3126:                /* Scan ahead for the next argument invocation. */
                   3127:
                   3128:                if (*cp++ != '\\')
                   3129:                        continue;
                   3130:                if (*cp++ != '$')
                   3131:                        continue;
1.274     schwarze 3132:                if (*cp == '*') {  /* \\$* inserts all arguments */
                   3133:                        ib = 0;
                   3134:                        ie = r->argc - 1;
                   3135:                } else {  /* \\$1 .. \\$9 insert one argument */
                   3136:                        ib = ie = *cp - '1';
                   3137:                        if (ib < 0 || ib > 8)
                   3138:                                continue;
                   3139:                }
1.263     schwarze 3140:                cp -= 2;
1.292     schwarze 3141:
                   3142:                /*
                   3143:                 * Prevent infinite recursion.
                   3144:                 */
                   3145:
                   3146:                if (cp >= n2)
                   3147:                        expand_count = 1;
                   3148:                else if (++expand_count > EXPAND_LIMIT) {
                   3149:                        mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
                   3150:                            ln, (int)(cp - n1), NULL);
1.293     schwarze 3151:                        free(buf->buf);
                   3152:                        buf->buf = n1;
1.292     schwarze 3153:                        return ROFF_IGN;
                   3154:                }
1.263     schwarze 3155:
                   3156:                /*
                   3157:                 * Determine the size of the expanded argument,
                   3158:                 * taking escaping of quotes into account.
                   3159:                 */
                   3160:
1.274     schwarze 3161:                asz = ie > ib ? ie - ib : 0;  /* for blanks */
                   3162:                for (i = ib; i <= ie; i++) {
                   3163:                        for (ap = arg[i]; *ap != '\0'; ap++) {
                   3164:                                asz++;
                   3165:                                if (*ap == '"')
                   3166:                                        asz += 3;
                   3167:                        }
1.263     schwarze 3168:                }
                   3169:                if (asz != 3) {
                   3170:
                   3171:                        /*
                   3172:                         * Determine the size of the rest of the
                   3173:                         * unexpanded macro, including the NUL.
                   3174:                         */
                   3175:
                   3176:                        rsz = buf->sz - (cp - n1) - 3;
                   3177:
                   3178:                        /*
                   3179:                         * When shrinking, move before
                   3180:                         * releasing the storage.
                   3181:                         */
                   3182:
                   3183:                        if (asz < 3)
                   3184:                                memmove(cp + asz, cp + 3, rsz);
                   3185:
                   3186:                        /*
                   3187:                         * Resize the storage for the macro
                   3188:                         * and readjust the parse pointer.
                   3189:                         */
                   3190:
                   3191:                        buf->sz += asz - 3;
                   3192:                        n2 = mandoc_realloc(n1, buf->sz);
                   3193:                        cp = n2 + (cp - n1);
                   3194:                        n1 = n2;
                   3195:
                   3196:                        /*
                   3197:                         * When growing, make room
                   3198:                         * for the expanded argument.
                   3199:                         */
                   3200:
                   3201:                        if (asz > 3)
                   3202:                                memmove(cp + asz, cp + 3, rsz);
                   3203:                }
                   3204:
                   3205:                /* Copy the expanded argument, escaping quotes. */
                   3206:
                   3207:                n2 = cp;
1.274     schwarze 3208:                for (i = ib; i <= ie; i++) {
                   3209:                        for (ap = arg[i]; *ap != '\0'; ap++) {
                   3210:                                if (*ap == '"') {
                   3211:                                        memcpy(n2, "\\(dq", 4);
                   3212:                                        n2 += 4;
                   3213:                                } else
                   3214:                                        *n2++ = *ap;
                   3215:                        }
                   3216:                        if (i < ie)
                   3217:                                *n2++ = ' ';
1.106     kristaps 3218:                }
1.99      kristaps 3219:        }
                   3220:
1.106     kristaps 3221:        /*
                   3222:         * Replace the macro invocation
                   3223:         * by the expanded macro.
                   3224:         */
1.263     schwarze 3225:
1.238     schwarze 3226:        free(buf->buf);
                   3227:        buf->buf = n1;
1.248     schwarze 3228:        *offs = 0;
1.106     kristaps 3229:
1.277     schwarze 3230:        return buf->sz > 1 && buf->buf[buf->sz - 2] == '\n' ?
                   3231:           ROFF_REPARSE : ROFF_APPEND;
1.99      kristaps 3232: }
1.121     schwarze 3233:
1.212     schwarze 3234: static size_t
1.121     schwarze 3235: roff_getname(struct roff *r, char **cpp, int ln, int pos)
                   3236: {
                   3237:        char     *name, *cp;
1.212     schwarze 3238:        size_t    namesz;
1.121     schwarze 3239:
                   3240:        name = *cpp;
                   3241:        if ('\0' == *name)
1.277     schwarze 3242:                return 0;
1.121     schwarze 3243:
1.212     schwarze 3244:        /* Read until end of name and terminate it with NUL. */
                   3245:        for (cp = name; 1; cp++) {
                   3246:                if ('\0' == *cp || ' ' == *cp) {
                   3247:                        namesz = cp - name;
                   3248:                        break;
                   3249:                }
1.121     schwarze 3250:                if ('\\' != *cp)
                   3251:                        continue;
1.215     schwarze 3252:                namesz = cp - name;
                   3253:                if ('{' == cp[1] || '}' == cp[1])
                   3254:                        break;
1.121     schwarze 3255:                cp++;
                   3256:                if ('\\' == *cp)
                   3257:                        continue;
1.224     schwarze 3258:                mandoc_vmsg(MANDOCERR_NAMESC, r->parse, ln, pos,
                   3259:                    "%.*s", (int)(cp - name + 1), name);
1.212     schwarze 3260:                mandoc_escape((const char **)&cp, NULL, NULL);
                   3261:                break;
1.121     schwarze 3262:        }
                   3263:
                   3264:        /* Read past spaces. */
                   3265:        while (' ' == *cp)
                   3266:                cp++;
                   3267:
                   3268:        *cpp = cp;
1.277     schwarze 3269:        return namesz;
1.121     schwarze 3270: }
                   3271:
1.106     kristaps 3272: /*
                   3273:  * Store *string into the user-defined string called *name.
                   3274:  * To clear an existing entry, call with (*r, *name, NULL, 0).
1.193     schwarze 3275:  * append == 0: replace mode
                   3276:  * append == 1: single-line append mode
                   3277:  * append == 2: multiline append mode, append '\n' after each call
1.106     kristaps 3278:  */
1.94      kristaps 3279: static void
1.106     kristaps 3280: roff_setstr(struct roff *r, const char *name, const char *string,
1.193     schwarze 3281:        int append)
1.92      schwarze 3282: {
1.164     kristaps 3283:
                   3284:        roff_setstrn(&r->strtab, name, strlen(name), string,
1.207     schwarze 3285:            string ? strlen(string) : 0, append);
1.164     kristaps 3286: }
                   3287:
                   3288: static void
1.166     kristaps 3289: roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
1.193     schwarze 3290:                const char *string, size_t stringsz, int append)
1.164     kristaps 3291: {
1.166     kristaps 3292:        struct roffkv   *n;
1.164     kristaps 3293:        char            *c;
                   3294:        int              i;
                   3295:        size_t           oldch, newch;
1.92      schwarze 3296:
1.106     kristaps 3297:        /* Search for an existing string with the same name. */
1.164     kristaps 3298:        n = *r;
                   3299:
1.211     schwarze 3300:        while (n && (namesz != n->key.sz ||
                   3301:                        strncmp(n->key.p, name, namesz)))
1.92      schwarze 3302:                n = n->next;
1.94      kristaps 3303:
                   3304:        if (NULL == n) {
1.106     kristaps 3305:                /* Create a new string table entry. */
1.166     kristaps 3306:                n = mandoc_malloc(sizeof(struct roffkv));
                   3307:                n->key.p = mandoc_strndup(name, namesz);
                   3308:                n->key.sz = namesz;
                   3309:                n->val.p = NULL;
                   3310:                n->val.sz = 0;
1.164     kristaps 3311:                n->next = *r;
                   3312:                *r = n;
1.193     schwarze 3313:        } else if (0 == append) {
1.166     kristaps 3314:                free(n->val.p);
                   3315:                n->val.p = NULL;
                   3316:                n->val.sz = 0;
1.106     kristaps 3317:        }
                   3318:
                   3319:        if (NULL == string)
                   3320:                return;
                   3321:
                   3322:        /*
                   3323:         * One additional byte for the '\n' in multiline mode,
                   3324:         * and one for the terminating '\0'.
                   3325:         */
1.193     schwarze 3326:        newch = stringsz + (1 < append ? 2u : 1u);
1.164     kristaps 3327:
1.166     kristaps 3328:        if (NULL == n->val.p) {
                   3329:                n->val.p = mandoc_malloc(newch);
                   3330:                *n->val.p = '\0';
1.106     kristaps 3331:                oldch = 0;
                   3332:        } else {
1.166     kristaps 3333:                oldch = n->val.sz;
                   3334:                n->val.p = mandoc_realloc(n->val.p, oldch + newch);
1.106     kristaps 3335:        }
                   3336:
                   3337:        /* Skip existing content in the destination buffer. */
1.166     kristaps 3338:        c = n->val.p + (int)oldch;
1.106     kristaps 3339:
                   3340:        /* Append new content to the destination buffer. */
1.164     kristaps 3341:        i = 0;
                   3342:        while (i < (int)stringsz) {
1.106     kristaps 3343:                /*
                   3344:                 * Rudimentary roff copy mode:
                   3345:                 * Handle escaped backslashes.
                   3346:                 */
1.164     kristaps 3347:                if ('\\' == string[i] && '\\' == string[i + 1])
                   3348:                        i++;
                   3349:                *c++ = string[i++];
1.106     kristaps 3350:        }
1.94      kristaps 3351:
1.106     kristaps 3352:        /* Append terminating bytes. */
1.193     schwarze 3353:        if (1 < append)
1.106     kristaps 3354:                *c++ = '\n';
1.163     kristaps 3355:
1.106     kristaps 3356:        *c = '\0';
1.166     kristaps 3357:        n->val.sz = (int)(c - n->val.p);
1.92      schwarze 3358: }
                   3359:
1.94      kristaps 3360: static const char *
                   3361: roff_getstrn(const struct roff *r, const char *name, size_t len)
1.92      schwarze 3362: {
1.166     kristaps 3363:        const struct roffkv *n;
1.191     schwarze 3364:        int i;
1.92      schwarze 3365:
1.164     kristaps 3366:        for (n = r->strtab; n; n = n->next)
1.207     schwarze 3367:                if (0 == strncmp(name, n->key.p, len) &&
                   3368:                    '\0' == n->key.p[(int)len])
1.277     schwarze 3369:                        return n->val.p;
1.191     schwarze 3370:
                   3371:        for (i = 0; i < PREDEFS_MAX; i++)
                   3372:                if (0 == strncmp(name, predefs[i].name, len) &&
                   3373:                                '\0' == predefs[i].name[(int)len])
1.277     schwarze 3374:                        return predefs[i].str;
1.94      kristaps 3375:
1.277     schwarze 3376:        return NULL;
1.92      schwarze 3377: }
                   3378:
1.94      kristaps 3379: static void
1.167     kristaps 3380: roff_freestr(struct roffkv *r)
1.92      schwarze 3381: {
1.166     kristaps 3382:        struct roffkv    *n, *nn;
1.92      schwarze 3383:
1.167     kristaps 3384:        for (n = r; n; n = nn) {
1.166     kristaps 3385:                free(n->key.p);
                   3386:                free(n->val.p);
1.92      schwarze 3387:                nn = n->next;
                   3388:                free(n);
                   3389:        }
1.114     kristaps 3390: }
1.266     schwarze 3391:
                   3392: /* --- accessors and utility functions ------------------------------------ */
1.114     kristaps 3393:
                   3394: const struct tbl_span *
                   3395: roff_span(const struct roff *r)
                   3396: {
1.207     schwarze 3397:
1.277     schwarze 3398:        return r->tbl ? tbl_span(r->tbl) : NULL;
1.125     kristaps 3399: }
                   3400:
                   3401: const struct eqn *
                   3402: roff_eqn(const struct roff *r)
                   3403: {
1.207     schwarze 3404:
1.277     schwarze 3405:        return r->last_eqn ? &r->last_eqn->eqn : NULL;
1.164     kristaps 3406: }
                   3407:
                   3408: /*
                   3409:  * Duplicate an input string, making the appropriate character
                   3410:  * conversations (as stipulated by `tr') along the way.
                   3411:  * Returns a heap-allocated string with all the replacements made.
                   3412:  */
                   3413: char *
                   3414: roff_strdup(const struct roff *r, const char *p)
                   3415: {
1.166     kristaps 3416:        const struct roffkv *cp;
1.164     kristaps 3417:        char            *res;
                   3418:        const char      *pp;
                   3419:        size_t           ssz, sz;
                   3420:        enum mandoc_esc  esc;
                   3421:
1.167     kristaps 3422:        if (NULL == r->xmbtab && NULL == r->xtab)
1.277     schwarze 3423:                return mandoc_strdup(p);
1.164     kristaps 3424:        else if ('\0' == *p)
1.277     schwarze 3425:                return mandoc_strdup("");
1.164     kristaps 3426:
                   3427:        /*
                   3428:         * Step through each character looking for term matches
                   3429:         * (remember that a `tr' can be invoked with an escape, which is
                   3430:         * a glyph but the escape is multi-character).
                   3431:         * We only do this if the character hash has been initialised
                   3432:         * and the string is >0 length.
                   3433:         */
                   3434:
                   3435:        res = NULL;
                   3436:        ssz = 0;
                   3437:
                   3438:        while ('\0' != *p) {
1.289     schwarze 3439:                assert((unsigned int)*p < 128);
                   3440:                if ('\\' != *p && r->xtab && r->xtab[(unsigned int)*p].p) {
1.167     kristaps 3441:                        sz = r->xtab[(int)*p].sz;
                   3442:                        res = mandoc_realloc(res, ssz + sz + 1);
                   3443:                        memcpy(res + ssz, r->xtab[(int)*p].p, sz);
                   3444:                        ssz += sz;
                   3445:                        p++;
                   3446:                        continue;
                   3447:                } else if ('\\' != *p) {
                   3448:                        res = mandoc_realloc(res, ssz + 2);
                   3449:                        res[ssz++] = *p++;
                   3450:                        continue;
                   3451:                }
                   3452:
1.164     kristaps 3453:                /* Search for term matches. */
1.167     kristaps 3454:                for (cp = r->xmbtab; cp; cp = cp->next)
1.166     kristaps 3455:                        if (0 == strncmp(p, cp->key.p, cp->key.sz))
1.164     kristaps 3456:                                break;
                   3457:
                   3458:                if (NULL != cp) {
                   3459:                        /*
                   3460:                         * A match has been found.
                   3461:                         * Append the match to the array and move
                   3462:                         * forward by its keysize.
                   3463:                         */
1.207     schwarze 3464:                        res = mandoc_realloc(res,
                   3465:                            ssz + cp->val.sz + 1);
1.166     kristaps 3466:                        memcpy(res + ssz, cp->val.p, cp->val.sz);
                   3467:                        ssz += cp->val.sz;
                   3468:                        p += (int)cp->key.sz;
1.164     kristaps 3469:                        continue;
                   3470:                }
                   3471:
1.167     kristaps 3472:                /*
                   3473:                 * Handle escapes carefully: we need to copy
                   3474:                 * over just the escape itself, or else we might
                   3475:                 * do replacements within the escape itself.
                   3476:                 * Make sure to pass along the bogus string.
                   3477:                 */
                   3478:                pp = p++;
                   3479:                esc = mandoc_escape(&p, NULL, NULL);
                   3480:                if (ESCAPE_ERROR == esc) {
                   3481:                        sz = strlen(pp);
1.164     kristaps 3482:                        res = mandoc_realloc(res, ssz + sz + 1);
                   3483:                        memcpy(res + ssz, pp, sz);
1.167     kristaps 3484:                        break;
1.164     kristaps 3485:                }
1.207     schwarze 3486:                /*
                   3487:                 * We bail out on bad escapes.
1.167     kristaps 3488:                 * No need to warn: we already did so when
                   3489:                 * roff_res() was called.
                   3490:                 */
                   3491:                sz = (int)(p - pp);
                   3492:                res = mandoc_realloc(res, ssz + sz + 1);
                   3493:                memcpy(res + ssz, pp, sz);
                   3494:                ssz += sz;
1.164     kristaps 3495:        }
                   3496:
                   3497:        res[(int)ssz] = '\0';
1.277     schwarze 3498:        return res;
1.227     schwarze 3499: }
                   3500:
                   3501: int
                   3502: roff_getformat(const struct roff *r)
                   3503: {
                   3504:

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