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Annotation of mandoc/mdoc.c, Revision 1.61

1.61    ! kristaps    1: /* $Id: mdoc.c,v 1.60 2009/03/09 14:19:59 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",
1.61    ! kristaps   75:        "Lp",           "Lk",           "Mt",           "Brq",
        !            76:        "Bro",          "Brc"
1.1       kristaps   77:        };
                     78:
                     79: const  char *const __mdoc_argnames[MDOC_ARG_MAX] = {
                     80:        "split",                "nosplit",              "ragged",
                     81:        "unfilled",             "literal",              "file",
                     82:        "offset",               "bullet",               "dash",
                     83:        "hyphen",               "item",                 "enum",
                     84:        "tag",                  "diag",                 "hang",
                     85:        "ohang",                "inset",                "column",
                     86:        "width",                "compact",              "std",
1.52      kristaps   87:        "filled",               "words",                "emphasis",
                     88:        "symbolic"
1.1       kristaps   89:        };
                     90:
                     91: const  char * const *mdoc_macronames = __mdoc_macronames;
                     92: const  char * const *mdoc_argnames = __mdoc_argnames;
                     93:
1.45      kristaps   94:
1.1       kristaps   95: const struct mdoc_node *
1.47      kristaps   96: mdoc_node(const struct mdoc *mdoc)
1.1       kristaps   97: {
                     98:
                     99:        return(mdoc->first);
                    100: }
                    101:
                    102:
1.37      kristaps  103: const struct mdoc_meta *
1.47      kristaps  104: mdoc_meta(const struct mdoc *mdoc)
1.37      kristaps  105: {
                    106:
                    107:        return(&mdoc->meta);
                    108: }
                    109:
                    110:
1.1       kristaps  111: void
1.38      kristaps  112: mdoc_free(struct mdoc *mdoc)
1.34      kristaps  113: {
                    114:
1.38      kristaps  115:        if (mdoc->first)
                    116:                mdoc_node_freelist(mdoc->first);
                    117:        if (mdoc->htab)
                    118:                mdoc_tokhash_free(mdoc->htab);
1.34      kristaps  119:        if (mdoc->meta.title)
                    120:                free(mdoc->meta.title);
                    121:        if (mdoc->meta.os)
                    122:                free(mdoc->meta.os);
                    123:        if (mdoc->meta.name)
                    124:                free(mdoc->meta.name);
1.52      kristaps  125:        if (mdoc->meta.arch)
                    126:                free(mdoc->meta.arch);
                    127:        if (mdoc->meta.vol)
                    128:                free(mdoc->meta.vol);
1.34      kristaps  129:
1.1       kristaps  130:        free(mdoc);
                    131: }
                    132:
                    133:
                    134: struct mdoc *
1.55      kristaps  135: mdoc_alloc(void *data, int pflags, const struct mdoc_cb *cb)
1.1       kristaps  136: {
                    137:        struct mdoc     *p;
                    138:
                    139:        p = xcalloc(1, sizeof(struct mdoc));
                    140:
                    141:        p->data = data;
1.33      kristaps  142:        if (cb)
                    143:                (void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
1.1       kristaps  144:
1.25      kristaps  145:        p->last = xcalloc(1, sizeof(struct mdoc_node));
                    146:        p->last->type = MDOC_ROOT;
                    147:        p->first = p->last;
1.55      kristaps  148:        p->pflags = pflags;
1.25      kristaps  149:        p->next = MDOC_NEXT_CHILD;
1.4       kristaps  150:        p->htab = mdoc_tokhash_alloc();
1.25      kristaps  151:
1.1       kristaps  152:        return(p);
                    153: }
                    154:
                    155:
                    156: int
1.20      kristaps  157: mdoc_endparse(struct mdoc *mdoc)
                    158: {
                    159:
                    160:        if (MDOC_HALT & mdoc->flags)
                    161:                return(0);
                    162:        if (NULL == mdoc->first)
                    163:                return(1);
                    164:
                    165:        assert(mdoc->last);
                    166:        if ( ! macro_end(mdoc)) {
                    167:                mdoc->flags |= MDOC_HALT;
                    168:                return(0);
                    169:        }
                    170:        return(1);
                    171: }
                    172:
                    173:
1.50      kristaps  174: /*
1.53      kristaps  175:  * Main parse routine.  Parses a single line -- really just hands off to
                    176:  * the macro or text parser.
1.50      kristaps  177:  */
1.20      kristaps  178: int
1.53      kristaps  179: mdoc_parseln(struct mdoc *m, int ln, char *buf)
1.1       kristaps  180: {
                    181:
1.53      kristaps  182:        /* If in error-mode, then we parse no more. */
1.50      kristaps  183:
1.53      kristaps  184:        if (MDOC_HALT & m->flags)
1.20      kristaps  185:                return(0);
1.50      kristaps  186:
1.53      kristaps  187:        return('.' == *buf ? parsemacro(m, ln, buf) :
                    188:                        parsetext(m, ln, buf));
1.1       kristaps  189: }
                    190:
                    191:
                    192: void
1.31      kristaps  193: mdoc_vmsg(struct mdoc *mdoc, int ln, int pos, const char *fmt, ...)
1.1       kristaps  194: {
1.31      kristaps  195:        char              buf[256];
1.23      kristaps  196:        va_list           ap;
1.1       kristaps  197:
                    198:        if (NULL == mdoc->cb.mdoc_msg)
                    199:                return;
                    200:
                    201:        va_start(ap, fmt);
1.31      kristaps  202:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1.1       kristaps  203:        va_end(ap);
1.31      kristaps  204:        (*mdoc->cb.mdoc_msg)(mdoc->data, ln, pos, buf);
1.1       kristaps  205: }
                    206:
                    207:
                    208: int
1.31      kristaps  209: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
                    210:                const char *fmt, ...)
1.1       kristaps  211: {
1.31      kristaps  212:        char             buf[256];
                    213:        va_list          ap;
1.1       kristaps  214:
                    215:        if (NULL == mdoc->cb.mdoc_err)
                    216:                return(0);
1.31      kristaps  217:
                    218:        va_start(ap, fmt);
                    219:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    220:        va_end(ap);
                    221:        return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
1.1       kristaps  222: }
                    223:
                    224:
                    225: int
1.31      kristaps  226: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos,
                    227:                enum mdoc_warn type, const char *fmt, ...)
1.1       kristaps  228: {
1.31      kristaps  229:        char             buf[256];
                    230:        va_list          ap;
1.1       kristaps  231:
                    232:        if (NULL == mdoc->cb.mdoc_warn)
                    233:                return(0);
1.31      kristaps  234:
                    235:        va_start(ap, fmt);
                    236:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    237:        va_end(ap);
                    238:        return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, type, buf));
1.1       kristaps  239: }
                    240:
                    241:
                    242: int
1.53      kristaps  243: mdoc_macro(struct mdoc *m, int tok,
                    244:                int ln, int pp, int *pos, char *buf)
1.1       kristaps  245: {
                    246:
1.53      kristaps  247:        /* FIXME - these should happen during validation. */
1.31      kristaps  248:
1.44      kristaps  249:        if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
1.53      kristaps  250:                        SEC_PROLOGUE != m->lastnamed)
                    251:                return(mdoc_perr(m, ln, pp,
                    252:                                "disallowed in document body"));
                    253:
1.44      kristaps  254:        if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
1.53      kristaps  255:                        SEC_PROLOGUE == m->lastnamed)
                    256:                return(mdoc_perr(m, ln, pp,
                    257:                                "disallowed in prologue"));
                    258:
                    259:        if (1 != pp && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
                    260:                return(mdoc_perr(m, ln, pp, "not callable"));
                    261:
                    262:        return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
1.1       kristaps  263: }
                    264:
                    265:
1.23      kristaps  266: static int
                    267: mdoc_node_append(struct mdoc *mdoc, struct mdoc_node *p)
1.1       kristaps  268: {
                    269:
1.25      kristaps  270:        assert(mdoc->last);
                    271:        assert(mdoc->first);
                    272:        assert(MDOC_ROOT != p->type);
1.1       kristaps  273:
1.13      kristaps  274:        switch (mdoc->next) {
                    275:        case (MDOC_NEXT_SIBLING):
1.6       kristaps  276:                mdoc->last->next = p;
                    277:                p->prev = mdoc->last;
1.13      kristaps  278:                p->parent = mdoc->last->parent;
1.1       kristaps  279:                break;
1.13      kristaps  280:        case (MDOC_NEXT_CHILD):
                    281:                mdoc->last->child = p;
1.1       kristaps  282:                p->parent = mdoc->last;
                    283:                break;
                    284:        default:
1.13      kristaps  285:                abort();
                    286:                /* NOTREACHED */
1.1       kristaps  287:        }
                    288:
1.23      kristaps  289:        if ( ! mdoc_valid_pre(mdoc, p))
                    290:                return(0);
1.27      kristaps  291:
                    292:        switch (p->type) {
                    293:        case (MDOC_HEAD):
                    294:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  295:                p->parent->head = p;
1.27      kristaps  296:                break;
                    297:        case (MDOC_TAIL):
                    298:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  299:                p->parent->tail = p;
1.27      kristaps  300:                break;
                    301:        case (MDOC_BODY):
                    302:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  303:                p->parent->body = p;
1.27      kristaps  304:                break;
                    305:        default:
                    306:                break;
                    307:        }
                    308:
1.1       kristaps  309:        mdoc->last = p;
1.23      kristaps  310:        return(1);
1.1       kristaps  311: }
                    312:
                    313:
1.45      kristaps  314: static struct mdoc_node *
1.46      kristaps  315: mdoc_node_alloc(const struct mdoc *mdoc)
1.45      kristaps  316: {
1.46      kristaps  317:        struct mdoc_node *p;
                    318:
                    319:        p = xcalloc(1, sizeof(struct mdoc_node));
                    320:        p->sec = mdoc->lastsec;
1.45      kristaps  321:
1.46      kristaps  322:        return(p);
1.45      kristaps  323: }
                    324:
                    325:
1.23      kristaps  326: int
1.22      kristaps  327: mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.17      kristaps  328: {
                    329:        struct mdoc_node *p;
                    330:
                    331:        assert(mdoc->first);
                    332:        assert(mdoc->last);
                    333:
1.46      kristaps  334:        p = mdoc_node_alloc(mdoc);
1.17      kristaps  335:
1.22      kristaps  336:        p->line = line;
                    337:        p->pos = pos;
1.17      kristaps  338:        p->type = MDOC_TAIL;
1.27      kristaps  339:        p->tok = tok;
1.17      kristaps  340:
1.23      kristaps  341:        return(mdoc_node_append(mdoc, p));
1.17      kristaps  342: }
                    343:
                    344:
1.23      kristaps  345: int
1.22      kristaps  346: mdoc_head_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  347: {
                    348:        struct mdoc_node *p;
                    349:
                    350:        assert(mdoc->first);
                    351:        assert(mdoc->last);
                    352:
1.46      kristaps  353:        p = mdoc_node_alloc(mdoc);
1.13      kristaps  354:
1.22      kristaps  355:        p->line = line;
                    356:        p->pos = pos;
1.1       kristaps  357:        p->type = MDOC_HEAD;
1.27      kristaps  358:        p->tok = tok;
1.1       kristaps  359:
1.23      kristaps  360:        return(mdoc_node_append(mdoc, p));
1.1       kristaps  361: }
                    362:
                    363:
1.23      kristaps  364: int
1.22      kristaps  365: mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  366: {
                    367:        struct mdoc_node *p;
                    368:
                    369:        assert(mdoc->first);
                    370:        assert(mdoc->last);
                    371:
1.46      kristaps  372:        p = mdoc_node_alloc(mdoc);
1.1       kristaps  373:
1.22      kristaps  374:        p->line = line;
                    375:        p->pos = pos;
1.1       kristaps  376:        p->type = MDOC_BODY;
1.27      kristaps  377:        p->tok = tok;
1.1       kristaps  378:
1.23      kristaps  379:        return(mdoc_node_append(mdoc, p));
1.1       kristaps  380: }
                    381:
                    382:
1.23      kristaps  383: int
1.25      kristaps  384: mdoc_root_alloc(struct mdoc *mdoc)
                    385: {
                    386:        struct mdoc_node *p;
                    387:
1.46      kristaps  388:        p = mdoc_node_alloc(mdoc);
1.25      kristaps  389:
                    390:        p->type = MDOC_ROOT;
                    391:
                    392:        return(mdoc_node_append(mdoc, p));
                    393: }
                    394:
                    395:
                    396: int
1.22      kristaps  397: mdoc_block_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  398:                int tok, struct mdoc_arg *args)
1.1       kristaps  399: {
                    400:        struct mdoc_node *p;
                    401:
1.46      kristaps  402:        p = mdoc_node_alloc(mdoc);
1.1       kristaps  403:
1.22      kristaps  404:        p->pos = pos;
                    405:        p->line = line;
1.1       kristaps  406:        p->type = MDOC_BLOCK;
1.27      kristaps  407:        p->tok = tok;
1.53      kristaps  408:        p->args = args;
                    409:
                    410:        if (args)
                    411:                (args->refcnt)++;
1.1       kristaps  412:
1.23      kristaps  413:        return(mdoc_node_append(mdoc, p));
1.1       kristaps  414: }
                    415:
                    416:
1.23      kristaps  417: int
1.22      kristaps  418: mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  419:                int tok, struct mdoc_arg *args)
1.1       kristaps  420: {
                    421:        struct mdoc_node *p;
                    422:
1.46      kristaps  423:        p = mdoc_node_alloc(mdoc);
1.22      kristaps  424:
                    425:        p->line = line;
                    426:        p->pos = pos;
1.1       kristaps  427:        p->type = MDOC_ELEM;
1.27      kristaps  428:        p->tok = tok;
1.53      kristaps  429:        p->args = args;
                    430:
                    431:        if (args)
                    432:                (args->refcnt)++;
1.1       kristaps  433:
1.23      kristaps  434:        return(mdoc_node_append(mdoc, p));
1.1       kristaps  435: }
                    436:
                    437:
1.23      kristaps  438: int
1.22      kristaps  439: mdoc_word_alloc(struct mdoc *mdoc,
                    440:                int line, int pos, const char *word)
1.1       kristaps  441: {
                    442:        struct mdoc_node *p;
                    443:
1.46      kristaps  444:        p = mdoc_node_alloc(mdoc);
1.45      kristaps  445:
1.22      kristaps  446:        p->line = line;
                    447:        p->pos = pos;
1.1       kristaps  448:        p->type = MDOC_TEXT;
1.53      kristaps  449:        p->string = xstrdup(word);
1.1       kristaps  450:
1.23      kristaps  451:        return(mdoc_node_append(mdoc, p));
1.1       kristaps  452: }
                    453:
                    454:
1.53      kristaps  455: void
                    456: mdoc_node_free(struct mdoc_node *p)
1.1       kristaps  457: {
                    458:
1.53      kristaps  459:        if (p->string)
                    460:                free(p->string);
                    461:        if (p->args)
                    462:                mdoc_argv_free(p->args);
1.1       kristaps  463:        free(p);
                    464: }
                    465:
                    466:
1.53      kristaps  467: void
                    468: mdoc_node_freelist(struct mdoc_node *p)
1.1       kristaps  469: {
                    470:
1.53      kristaps  471:        if (p->child)
                    472:                mdoc_node_freelist(p->child);
                    473:        if (p->next)
                    474:                mdoc_node_freelist(p->next);
1.1       kristaps  475:
1.53      kristaps  476:        mdoc_node_free(p);
1.1       kristaps  477: }
                    478:
                    479:
1.53      kristaps  480: /*
                    481:  * Parse free-form text, that is, a line that does not begin with the
                    482:  * control character.
                    483:  */
                    484: static int
                    485: parsetext(struct mdoc *mdoc, int line, char *buf)
1.1       kristaps  486: {
                    487:
1.53      kristaps  488:        if (SEC_PROLOGUE == mdoc->lastnamed)
                    489:                return(mdoc_perr(mdoc, line, 0,
                    490:                        "text disallowed in prologue"));
1.1       kristaps  491:
1.53      kristaps  492:        if ( ! mdoc_word_alloc(mdoc, line, 0, buf))
                    493:                return(0);
1.1       kristaps  494:
1.53      kristaps  495:        mdoc->next = MDOC_NEXT_SIBLING;
                    496:        return(1);
1.1       kristaps  497: }
                    498:
                    499:
1.58      kristaps  500: static int
                    501: macrowarn(struct mdoc *m, int ln, const char *buf)
                    502: {
                    503:        if ( ! (MDOC_IGN_MACRO & m->pflags))
                    504:                return(mdoc_perr(m, ln, 1, "unknown macro: %s%s",
1.59      kristaps  505:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  506:        return(mdoc_pwarn(m, ln, 1, WARN_SYNTAX,
                    507:                                "unknown macro: %s%s",
1.59      kristaps  508:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  509: }
                    510:
                    511:
                    512:
1.53      kristaps  513: /*
                    514:  * Parse a macro line, that is, a line beginning with the control
                    515:  * character.
                    516:  */
                    517: int
                    518: parsemacro(struct mdoc *m, int ln, char *buf)
1.1       kristaps  519: {
1.53      kristaps  520:        int               i, c;
                    521:        char              mac[5];
1.1       kristaps  522:
1.53      kristaps  523:        /* Comments are quickly ignored. */
1.1       kristaps  524:
1.53      kristaps  525:        if (buf[1] && '\\' == buf[1])
                    526:                if (buf[2] && '\"' == buf[2])
                    527:                        return(1);
1.1       kristaps  528:
1.53      kristaps  529:        /* Copy the first word into a nil-terminated buffer. */
1.1       kristaps  530:
1.53      kristaps  531:        for (i = 1; i < 5; i++) {
                    532:                if (0 == (mac[i - 1] = buf[i]))
                    533:                        break;
                    534:                else if (isspace((unsigned char)buf[i]))
                    535:                        break;
                    536:        }
1.1       kristaps  537:
1.54      kristaps  538:        /* FIXME: be able to skip unknown macro lines! */
                    539:
1.53      kristaps  540:        mac[i - 1] = 0;
1.1       kristaps  541:
1.53      kristaps  542:        if (i == 5 || i <= 2) {
1.58      kristaps  543:                if ( ! macrowarn(m, ln, mac))
                    544:                        goto err;
                    545:                return(1);
1.53      kristaps  546:        }
                    547:
                    548:        if (MDOC_MAX == (c = mdoc_tokhash_find(m->htab, mac))) {
1.58      kristaps  549:                if ( ! macrowarn(m, ln, mac))
                    550:                        goto err;
                    551:                return(1);
1.53      kristaps  552:        }
1.1       kristaps  553:
1.53      kristaps  554:        /* The macro is sane.  Jump to the next word. */
1.1       kristaps  555:
1.53      kristaps  556:        while (buf[i] && isspace((unsigned char)buf[i]))
                    557:                i++;
1.1       kristaps  558:
1.53      kristaps  559:        /* Begin recursive parse sequence. */
1.1       kristaps  560:
1.53      kristaps  561:        if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
                    562:                goto err;
1.1       kristaps  563:
1.53      kristaps  564:        return(1);
1.1       kristaps  565:
1.53      kristaps  566: err:   /* Error out. */
1.1       kristaps  567:
1.53      kristaps  568:        m->flags |= MDOC_HALT;
                    569:        return(0);
1.1       kristaps  570: }

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