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Annotation of mandoc/mdoc.c, Revision 1.60

1.60    ! kristaps    1: /* $Id: mdoc.c,v 1.59 2009/03/09 13:35:09 kristaps Exp $ */
1.1       kristaps    2: /*
                      3:  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
                      4:  *
                      5:  * Permission to use, copy, modify, and distribute this software for any
                      6:  * purpose with or without fee is hereby granted, provided that the
                      7:  * above copyright notice and this permission notice appear in all
                      8:  * copies.
                      9:  *
                     10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
                     11:  * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
                     12:  * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
                     13:  * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
                     14:  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
                     15:  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
                     16:  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
                     17:  * PERFORMANCE OF THIS SOFTWARE.
                     18:  */
                     19: #include <assert.h>
                     20: #include <ctype.h>
                     21: #include <err.h>
                     22: #include <stdarg.h>
                     23: #include <stdlib.h>
                     24: #include <stdio.h>
                     25: #include <string.h>
                     26:
                     27: #include "private.h"
                     28:
1.41      kristaps   29: /*
                     30:  * Main caller in the libmdoc library.  This begins the parsing routine,
                     31:  * handles allocation of data, and so forth.  Most of the "work" is done
1.48      kristaps   32:  * in macro.c and validate.c.
1.41      kristaps   33:  */
                     34:
1.48      kristaps   35: static struct mdoc_node *mdoc_node_alloc(const struct mdoc *);
                     36: static int               mdoc_node_append(struct mdoc *,
                     37:                                struct mdoc_node *);
1.53      kristaps   38:
                     39: static int               parsetext(struct mdoc *, int, char *);
                     40: static int               parsemacro(struct mdoc *, int, char *);
1.58      kristaps   41: static int               macrowarn(struct mdoc *, int, const char *);
1.48      kristaps   42:
                     43:
1.1       kristaps   44: const  char *const __mdoc_macronames[MDOC_MAX] = {
                     45:        "\\\"",         "Dd",           "Dt",           "Os",
                     46:        "Sh",           "Ss",           "Pp",           "D1",
                     47:        "Dl",           "Bd",           "Ed",           "Bl",
                     48:        "El",           "It",           "Ad",           "An",
                     49:        "Ar",           "Cd",           "Cm",           "Dv",
                     50:        "Er",           "Ev",           "Ex",           "Fa",
                     51:        "Fd",           "Fl",           "Fn",           "Ft",
                     52:        "Ic",           "In",           "Li",           "Nd",
                     53:        "Nm",           "Op",           "Ot",           "Pa",
                     54:        "Rv",           "St",           "Va",           "Vt",
                     55:        /* LINTED */
                     56:        "Xr",           "\%A",          "\%B",          "\%D",
                     57:        /* LINTED */
                     58:        "\%I",          "\%J",          "\%N",          "\%O",
                     59:        /* LINTED */
                     60:        "\%P",          "\%R",          "\%T",          "\%V",
                     61:        "Ac",           "Ao",           "Aq",           "At",
                     62:        "Bc",           "Bf",           "Bo",           "Bq",
                     63:        "Bsx",          "Bx",           "Db",           "Dc",
                     64:        "Do",           "Dq",           "Ec",           "Ef",
                     65:        "Em",           "Eo",           "Fx",           "Ms",
                     66:        "No",           "Ns",           "Nx",           "Ox",
                     67:        "Pc",           "Pf",           "Po",           "Pq",
                     68:        "Qc",           "Ql",           "Qo",           "Qq",
                     69:        "Re",           "Rs",           "Sc",           "So",
                     70:        "Sq",           "Sm",           "Sx",           "Sy",
                     71:        "Tn",           "Ux",           "Xc",           "Xo",
                     72:        "Fo",           "Fc",           "Oo",           "Oc",
                     73:        "Bk",           "Ek",           "Bt",           "Hf",
1.57      kristaps   74:        "Fr",           "Ud",           "Lb",           "Ap",
1.60    ! kristaps   75:        "Lp",           "Lk",           "Mt"
1.1       kristaps   76:        };
                     77:
                     78: const  char *const __mdoc_argnames[MDOC_ARG_MAX] = {
                     79:        "split",                "nosplit",              "ragged",
                     80:        "unfilled",             "literal",              "file",
                     81:        "offset",               "bullet",               "dash",
                     82:        "hyphen",               "item",                 "enum",
                     83:        "tag",                  "diag",                 "hang",
                     84:        "ohang",                "inset",                "column",
                     85:        "width",                "compact",              "std",
1.52      kristaps   86:        "filled",               "words",                "emphasis",
                     87:        "symbolic"
1.1       kristaps   88:        };
                     89:
                     90: const  char * const *mdoc_macronames = __mdoc_macronames;
                     91: const  char * const *mdoc_argnames = __mdoc_argnames;
                     92:
1.45      kristaps   93:
1.1       kristaps   94: const struct mdoc_node *
1.47      kristaps   95: mdoc_node(const struct mdoc *mdoc)
1.1       kristaps   96: {
                     97:
                     98:        return(mdoc->first);
                     99: }
                    100:
                    101:
1.37      kristaps  102: const struct mdoc_meta *
1.47      kristaps  103: mdoc_meta(const struct mdoc *mdoc)
1.37      kristaps  104: {
                    105:
                    106:        return(&mdoc->meta);
                    107: }
                    108:
                    109:
1.1       kristaps  110: void
1.38      kristaps  111: mdoc_free(struct mdoc *mdoc)
1.34      kristaps  112: {
                    113:
1.38      kristaps  114:        if (mdoc->first)
                    115:                mdoc_node_freelist(mdoc->first);
                    116:        if (mdoc->htab)
                    117:                mdoc_tokhash_free(mdoc->htab);
1.34      kristaps  118:        if (mdoc->meta.title)
                    119:                free(mdoc->meta.title);
                    120:        if (mdoc->meta.os)
                    121:                free(mdoc->meta.os);
                    122:        if (mdoc->meta.name)
                    123:                free(mdoc->meta.name);
1.52      kristaps  124:        if (mdoc->meta.arch)
                    125:                free(mdoc->meta.arch);
                    126:        if (mdoc->meta.vol)
                    127:                free(mdoc->meta.vol);
1.34      kristaps  128:
1.1       kristaps  129:        free(mdoc);
                    130: }
                    131:
                    132:
                    133: struct mdoc *
1.55      kristaps  134: mdoc_alloc(void *data, int pflags, const struct mdoc_cb *cb)
1.1       kristaps  135: {
                    136:        struct mdoc     *p;
                    137:
                    138:        p = xcalloc(1, sizeof(struct mdoc));
                    139:
                    140:        p->data = data;
1.33      kristaps  141:        if (cb)
                    142:                (void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
1.1       kristaps  143:
1.25      kristaps  144:        p->last = xcalloc(1, sizeof(struct mdoc_node));
                    145:        p->last->type = MDOC_ROOT;
                    146:        p->first = p->last;
1.55      kristaps  147:        p->pflags = pflags;
1.25      kristaps  148:        p->next = MDOC_NEXT_CHILD;
1.4       kristaps  149:        p->htab = mdoc_tokhash_alloc();
1.25      kristaps  150:
1.1       kristaps  151:        return(p);
                    152: }
                    153:
                    154:
                    155: int
1.20      kristaps  156: mdoc_endparse(struct mdoc *mdoc)
                    157: {
                    158:
                    159:        if (MDOC_HALT & mdoc->flags)
                    160:                return(0);
                    161:        if (NULL == mdoc->first)
                    162:                return(1);
                    163:
                    164:        assert(mdoc->last);
                    165:        if ( ! macro_end(mdoc)) {
                    166:                mdoc->flags |= MDOC_HALT;
                    167:                return(0);
                    168:        }
                    169:        return(1);
                    170: }
                    171:
                    172:
1.50      kristaps  173: /*
1.53      kristaps  174:  * Main parse routine.  Parses a single line -- really just hands off to
                    175:  * the macro or text parser.
1.50      kristaps  176:  */
1.20      kristaps  177: int
1.53      kristaps  178: mdoc_parseln(struct mdoc *m, int ln, char *buf)
1.1       kristaps  179: {
                    180:
1.53      kristaps  181:        /* If in error-mode, then we parse no more. */
1.50      kristaps  182:
1.53      kristaps  183:        if (MDOC_HALT & m->flags)
1.20      kristaps  184:                return(0);
1.50      kristaps  185:
1.53      kristaps  186:        return('.' == *buf ? parsemacro(m, ln, buf) :
                    187:                        parsetext(m, ln, buf));
1.1       kristaps  188: }
                    189:
                    190:
                    191: void
1.31      kristaps  192: mdoc_vmsg(struct mdoc *mdoc, int ln, int pos, const char *fmt, ...)
1.1       kristaps  193: {
1.31      kristaps  194:        char              buf[256];
1.23      kristaps  195:        va_list           ap;
1.1       kristaps  196:
                    197:        if (NULL == mdoc->cb.mdoc_msg)
                    198:                return;
                    199:
                    200:        va_start(ap, fmt);
1.31      kristaps  201:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1.1       kristaps  202:        va_end(ap);
1.31      kristaps  203:        (*mdoc->cb.mdoc_msg)(mdoc->data, ln, pos, buf);
1.1       kristaps  204: }
                    205:
                    206:
                    207: int
1.31      kristaps  208: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
                    209:                const char *fmt, ...)
1.1       kristaps  210: {
1.31      kristaps  211:        char             buf[256];
                    212:        va_list          ap;
1.1       kristaps  213:
                    214:        if (NULL == mdoc->cb.mdoc_err)
                    215:                return(0);
1.31      kristaps  216:
                    217:        va_start(ap, fmt);
                    218:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    219:        va_end(ap);
                    220:        return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
1.1       kristaps  221: }
                    222:
                    223:
                    224: int
1.31      kristaps  225: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos,
                    226:                enum mdoc_warn type, const char *fmt, ...)
1.1       kristaps  227: {
1.31      kristaps  228:        char             buf[256];
                    229:        va_list          ap;
1.1       kristaps  230:
                    231:        if (NULL == mdoc->cb.mdoc_warn)
                    232:                return(0);
1.31      kristaps  233:
                    234:        va_start(ap, fmt);
                    235:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    236:        va_end(ap);
                    237:        return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, type, buf));
1.1       kristaps  238: }
                    239:
                    240:
                    241: int
1.53      kristaps  242: mdoc_macro(struct mdoc *m, int tok,
                    243:                int ln, int pp, int *pos, char *buf)
1.1       kristaps  244: {
                    245:
1.53      kristaps  246:        /* FIXME - these should happen during validation. */
1.31      kristaps  247:
1.44      kristaps  248:        if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
1.53      kristaps  249:                        SEC_PROLOGUE != m->lastnamed)
                    250:                return(mdoc_perr(m, ln, pp,
                    251:                                "disallowed in document body"));
                    252:
1.44      kristaps  253:        if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
1.53      kristaps  254:                        SEC_PROLOGUE == m->lastnamed)
                    255:                return(mdoc_perr(m, ln, pp,
                    256:                                "disallowed in prologue"));
                    257:
                    258:        if (1 != pp && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
                    259:                return(mdoc_perr(m, ln, pp, "not callable"));
                    260:
                    261:        return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
1.1       kristaps  262: }
                    263:
                    264:
1.23      kristaps  265: static int
                    266: mdoc_node_append(struct mdoc *mdoc, struct mdoc_node *p)
1.1       kristaps  267: {
                    268:
1.25      kristaps  269:        assert(mdoc->last);
                    270:        assert(mdoc->first);
                    271:        assert(MDOC_ROOT != p->type);
1.1       kristaps  272:
1.13      kristaps  273:        switch (mdoc->next) {
                    274:        case (MDOC_NEXT_SIBLING):
1.6       kristaps  275:                mdoc->last->next = p;
                    276:                p->prev = mdoc->last;
1.13      kristaps  277:                p->parent = mdoc->last->parent;
1.1       kristaps  278:                break;
1.13      kristaps  279:        case (MDOC_NEXT_CHILD):
                    280:                mdoc->last->child = p;
1.1       kristaps  281:                p->parent = mdoc->last;
                    282:                break;
                    283:        default:
1.13      kristaps  284:                abort();
                    285:                /* NOTREACHED */
1.1       kristaps  286:        }
                    287:
1.23      kristaps  288:        if ( ! mdoc_valid_pre(mdoc, p))
                    289:                return(0);
1.27      kristaps  290:
                    291:        switch (p->type) {
                    292:        case (MDOC_HEAD):
                    293:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  294:                p->parent->head = p;
1.27      kristaps  295:                break;
                    296:        case (MDOC_TAIL):
                    297:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  298:                p->parent->tail = p;
1.27      kristaps  299:                break;
                    300:        case (MDOC_BODY):
                    301:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  302:                p->parent->body = p;
1.27      kristaps  303:                break;
                    304:        default:
                    305:                break;
                    306:        }
                    307:
1.1       kristaps  308:        mdoc->last = p;
1.23      kristaps  309:        return(1);
1.1       kristaps  310: }
                    311:
                    312:
1.45      kristaps  313: static struct mdoc_node *
1.46      kristaps  314: mdoc_node_alloc(const struct mdoc *mdoc)
1.45      kristaps  315: {
1.46      kristaps  316:        struct mdoc_node *p;
                    317:
                    318:        p = xcalloc(1, sizeof(struct mdoc_node));
                    319:        p->sec = mdoc->lastsec;
1.45      kristaps  320:
1.46      kristaps  321:        return(p);
1.45      kristaps  322: }
                    323:
                    324:
1.23      kristaps  325: int
1.22      kristaps  326: mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.17      kristaps  327: {
                    328:        struct mdoc_node *p;
                    329:
                    330:        assert(mdoc->first);
                    331:        assert(mdoc->last);
                    332:
1.46      kristaps  333:        p = mdoc_node_alloc(mdoc);
1.17      kristaps  334:
1.22      kristaps  335:        p->line = line;
                    336:        p->pos = pos;
1.17      kristaps  337:        p->type = MDOC_TAIL;
1.27      kristaps  338:        p->tok = tok;
1.17      kristaps  339:
1.23      kristaps  340:        return(mdoc_node_append(mdoc, p));
1.17      kristaps  341: }
                    342:
                    343:
1.23      kristaps  344: int
1.22      kristaps  345: mdoc_head_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  346: {
                    347:        struct mdoc_node *p;
                    348:
                    349:        assert(mdoc->first);
                    350:        assert(mdoc->last);
                    351:
1.46      kristaps  352:        p = mdoc_node_alloc(mdoc);
1.13      kristaps  353:
1.22      kristaps  354:        p->line = line;
                    355:        p->pos = pos;
1.1       kristaps  356:        p->type = MDOC_HEAD;
1.27      kristaps  357:        p->tok = tok;
1.1       kristaps  358:
1.23      kristaps  359:        return(mdoc_node_append(mdoc, p));
1.1       kristaps  360: }
                    361:
                    362:
1.23      kristaps  363: int
1.22      kristaps  364: mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  365: {
                    366:        struct mdoc_node *p;
                    367:
                    368:        assert(mdoc->first);
                    369:        assert(mdoc->last);
                    370:
1.46      kristaps  371:        p = mdoc_node_alloc(mdoc);
1.1       kristaps  372:
1.22      kristaps  373:        p->line = line;
                    374:        p->pos = pos;
1.1       kristaps  375:        p->type = MDOC_BODY;
1.27      kristaps  376:        p->tok = tok;
1.1       kristaps  377:
1.23      kristaps  378:        return(mdoc_node_append(mdoc, p));
1.1       kristaps  379: }
                    380:
                    381:
1.23      kristaps  382: int
1.25      kristaps  383: mdoc_root_alloc(struct mdoc *mdoc)
                    384: {
                    385:        struct mdoc_node *p;
                    386:
1.46      kristaps  387:        p = mdoc_node_alloc(mdoc);
1.25      kristaps  388:
                    389:        p->type = MDOC_ROOT;
                    390:
                    391:        return(mdoc_node_append(mdoc, p));
                    392: }
                    393:
                    394:
                    395: int
1.22      kristaps  396: mdoc_block_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  397:                int tok, struct mdoc_arg *args)
1.1       kristaps  398: {
                    399:        struct mdoc_node *p;
                    400:
1.46      kristaps  401:        p = mdoc_node_alloc(mdoc);
1.1       kristaps  402:
1.22      kristaps  403:        p->pos = pos;
                    404:        p->line = line;
1.1       kristaps  405:        p->type = MDOC_BLOCK;
1.27      kristaps  406:        p->tok = tok;
1.53      kristaps  407:        p->args = args;
                    408:
                    409:        if (args)
                    410:                (args->refcnt)++;
1.1       kristaps  411:
1.23      kristaps  412:        return(mdoc_node_append(mdoc, p));
1.1       kristaps  413: }
                    414:
                    415:
1.23      kristaps  416: int
1.22      kristaps  417: mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  418:                int tok, struct mdoc_arg *args)
1.1       kristaps  419: {
                    420:        struct mdoc_node *p;
                    421:
1.46      kristaps  422:        p = mdoc_node_alloc(mdoc);
1.22      kristaps  423:
                    424:        p->line = line;
                    425:        p->pos = pos;
1.1       kristaps  426:        p->type = MDOC_ELEM;
1.27      kristaps  427:        p->tok = tok;
1.53      kristaps  428:        p->args = args;
                    429:
                    430:        if (args)
                    431:                (args->refcnt)++;
1.1       kristaps  432:
1.23      kristaps  433:        return(mdoc_node_append(mdoc, p));
1.1       kristaps  434: }
                    435:
                    436:
1.23      kristaps  437: int
1.22      kristaps  438: mdoc_word_alloc(struct mdoc *mdoc,
                    439:                int line, int pos, const char *word)
1.1       kristaps  440: {
                    441:        struct mdoc_node *p;
                    442:
1.46      kristaps  443:        p = mdoc_node_alloc(mdoc);
1.45      kristaps  444:
1.22      kristaps  445:        p->line = line;
                    446:        p->pos = pos;
1.1       kristaps  447:        p->type = MDOC_TEXT;
1.53      kristaps  448:        p->string = xstrdup(word);
1.1       kristaps  449:
1.23      kristaps  450:        return(mdoc_node_append(mdoc, p));
1.1       kristaps  451: }
                    452:
                    453:
1.53      kristaps  454: void
                    455: mdoc_node_free(struct mdoc_node *p)
1.1       kristaps  456: {
                    457:
1.53      kristaps  458:        if (p->string)
                    459:                free(p->string);
                    460:        if (p->args)
                    461:                mdoc_argv_free(p->args);
1.1       kristaps  462:        free(p);
                    463: }
                    464:
                    465:
1.53      kristaps  466: void
                    467: mdoc_node_freelist(struct mdoc_node *p)
1.1       kristaps  468: {
                    469:
1.53      kristaps  470:        if (p->child)
                    471:                mdoc_node_freelist(p->child);
                    472:        if (p->next)
                    473:                mdoc_node_freelist(p->next);
1.1       kristaps  474:
1.53      kristaps  475:        mdoc_node_free(p);
1.1       kristaps  476: }
                    477:
                    478:
1.53      kristaps  479: /*
                    480:  * Parse free-form text, that is, a line that does not begin with the
                    481:  * control character.
                    482:  */
                    483: static int
                    484: parsetext(struct mdoc *mdoc, int line, char *buf)
1.1       kristaps  485: {
                    486:
1.53      kristaps  487:        if (SEC_PROLOGUE == mdoc->lastnamed)
                    488:                return(mdoc_perr(mdoc, line, 0,
                    489:                        "text disallowed in prologue"));
1.1       kristaps  490:
1.53      kristaps  491:        if ( ! mdoc_word_alloc(mdoc, line, 0, buf))
                    492:                return(0);
1.1       kristaps  493:
1.53      kristaps  494:        mdoc->next = MDOC_NEXT_SIBLING;
                    495:        return(1);
1.1       kristaps  496: }
                    497:
                    498:
1.58      kristaps  499: static int
                    500: macrowarn(struct mdoc *m, int ln, const char *buf)
                    501: {
                    502:        if ( ! (MDOC_IGN_MACRO & m->pflags))
                    503:                return(mdoc_perr(m, ln, 1, "unknown macro: %s%s",
1.59      kristaps  504:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  505:        return(mdoc_pwarn(m, ln, 1, WARN_SYNTAX,
                    506:                                "unknown macro: %s%s",
1.59      kristaps  507:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  508: }
                    509:
                    510:
                    511:
1.53      kristaps  512: /*
                    513:  * Parse a macro line, that is, a line beginning with the control
                    514:  * character.
                    515:  */
                    516: int
                    517: parsemacro(struct mdoc *m, int ln, char *buf)
1.1       kristaps  518: {
1.53      kristaps  519:        int               i, c;
                    520:        char              mac[5];
1.1       kristaps  521:
1.53      kristaps  522:        /* Comments are quickly ignored. */
1.1       kristaps  523:
1.53      kristaps  524:        if (buf[1] && '\\' == buf[1])
                    525:                if (buf[2] && '\"' == buf[2])
                    526:                        return(1);
1.1       kristaps  527:
1.53      kristaps  528:        /* Copy the first word into a nil-terminated buffer. */
1.1       kristaps  529:
1.53      kristaps  530:        for (i = 1; i < 5; i++) {
                    531:                if (0 == (mac[i - 1] = buf[i]))
                    532:                        break;
                    533:                else if (isspace((unsigned char)buf[i]))
                    534:                        break;
                    535:        }
1.1       kristaps  536:
1.54      kristaps  537:        /* FIXME: be able to skip unknown macro lines! */
                    538:
1.53      kristaps  539:        mac[i - 1] = 0;
1.1       kristaps  540:
1.53      kristaps  541:        if (i == 5 || i <= 2) {
1.58      kristaps  542:                if ( ! macrowarn(m, ln, mac))
                    543:                        goto err;
                    544:                return(1);
1.53      kristaps  545:        }
                    546:
                    547:        if (MDOC_MAX == (c = mdoc_tokhash_find(m->htab, mac))) {
1.58      kristaps  548:                if ( ! macrowarn(m, ln, mac))
                    549:                        goto err;
                    550:                return(1);
1.53      kristaps  551:        }
1.1       kristaps  552:
1.53      kristaps  553:        /* The macro is sane.  Jump to the next word. */
1.1       kristaps  554:
1.53      kristaps  555:        while (buf[i] && isspace((unsigned char)buf[i]))
                    556:                i++;
1.1       kristaps  557:
1.53      kristaps  558:        /* Begin recursive parse sequence. */
1.1       kristaps  559:
1.53      kristaps  560:        if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
                    561:                goto err;
1.1       kristaps  562:
1.53      kristaps  563:        return(1);
1.1       kristaps  564:
1.53      kristaps  565: err:   /* Error out. */
1.1       kristaps  566:
1.53      kristaps  567:        m->flags |= MDOC_HALT;
                    568:        return(0);
1.1       kristaps  569: }

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