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Annotation of mandoc/man.c, Revision 1.90

1.90    ! kristaps    1: /*     $Id: man.c,v 1.89 2010/12/05 16:14:16 kristaps Exp $ */
1.1       kristaps    2: /*
1.82      schwarze    3:  * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
1.1       kristaps    4:  *
                      5:  * Permission to use, copy, modify, and distribute this software for any
1.18      kristaps    6:  * purpose with or without fee is hereby granted, provided that the above
                      7:  * copyright notice and this permission notice appear in all copies.
1.1       kristaps    8:  *
1.18      kristaps    9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1       kristaps   16:  */
1.47      kristaps   17: #ifdef HAVE_CONFIG_H
                     18: #include "config.h"
                     19: #endif
                     20:
1.41      kristaps   21: #include <sys/types.h>
                     22:
1.1       kristaps   23: #include <assert.h>
                     24: #include <stdarg.h>
                     25: #include <stdlib.h>
                     26: #include <stdio.h>
                     27: #include <string.h>
                     28:
1.74      kristaps   29: #include "mandoc.h"
1.1       kristaps   30: #include "libman.h"
1.45      kristaps   31: #include "libmandoc.h"
1.1       kristaps   32:
                     33: const  char *const __man_macronames[MAN_MAX] = {
1.21      kristaps   34:        "br",           "TH",           "SH",           "SS",
1.1       kristaps   35:        "TP",           "LP",           "PP",           "P",
                     36:        "IP",           "HP",           "SM",           "SB",
                     37:        "BI",           "IB",           "BR",           "RB",
1.11      kristaps   38:        "R",            "B",            "I",            "IR",
1.29      kristaps   39:        "RI",           "na",           "i",            "sp",
1.30      kristaps   40:        "nf",           "fi",           "r",            "RE",
1.52      kristaps   41:        "RS",           "DT",           "UC",           "PD",
1.89      kristaps   42:        "AT",           "in"
1.1       kristaps   43:        };
                     44:
                     45: const  char * const *man_macronames = __man_macronames;
                     46:
1.16      kristaps   47: static struct man_node *man_node_alloc(int, int,
1.53      kristaps   48:                                enum man_type, enum mant);
1.1       kristaps   49: static int              man_node_append(struct man *,
                     50:                                struct man_node *);
1.54      kristaps   51: static void             man_node_free(struct man_node *);
                     52: static void             man_node_unlink(struct man *,
                     53:                                struct man_node *);
1.72      kristaps   54: static int              man_ptext(struct man *, int, char *, int);
1.79      kristaps   55: static int              man_pmacro(struct man *, int, char *, int);
1.2       kristaps   56: static void             man_free1(struct man *);
1.45      kristaps   57: static void             man_alloc1(struct man *);
1.1       kristaps   58:
                     59:
                     60: const struct man_node *
1.2       kristaps   61: man_node(const struct man *m)
1.1       kristaps   62: {
                     63:
1.2       kristaps   64:        return(MAN_HALT & m->flags ? NULL : m->first);
1.1       kristaps   65: }
                     66:
                     67:
                     68: const struct man_meta *
1.2       kristaps   69: man_meta(const struct man *m)
1.1       kristaps   70: {
                     71:
1.2       kristaps   72:        return(MAN_HALT & m->flags ? NULL : &m->meta);
1.1       kristaps   73: }
                     74:
                     75:
1.45      kristaps   76: void
1.1       kristaps   77: man_reset(struct man *man)
                     78: {
                     79:
1.2       kristaps   80:        man_free1(man);
1.45      kristaps   81:        man_alloc1(man);
1.1       kristaps   82: }
                     83:
                     84:
                     85: void
                     86: man_free(struct man *man)
                     87: {
                     88:
1.2       kristaps   89:        man_free1(man);
1.1       kristaps   90:        free(man);
                     91: }
                     92:
                     93:
                     94: struct man *
1.87      schwarze   95: man_alloc(struct regset *regs, void *data, mandocmsg msg)
1.1       kristaps   96: {
                     97:        struct man      *p;
                     98:
1.45      kristaps   99:        p = mandoc_calloc(1, sizeof(struct man));
1.2       kristaps  100:
1.40      kristaps  101:        man_hash_init();
1.4       kristaps  102:        p->data = data;
1.74      kristaps  103:        p->msg = msg;
1.79      kristaps  104:        p->regs = regs;
1.45      kristaps  105:
                    106:        man_alloc1(p);
1.1       kristaps  107:        return(p);
                    108: }
                    109:
                    110:
                    111: int
                    112: man_endparse(struct man *m)
                    113: {
                    114:
1.3       kristaps  115:        if (MAN_HALT & m->flags)
                    116:                return(0);
                    117:        else if (man_macroend(m))
                    118:                return(1);
                    119:        m->flags |= MAN_HALT;
                    120:        return(0);
1.1       kristaps  121: }
                    122:
                    123:
                    124: int
1.79      kristaps  125: man_parseln(struct man *m, int ln, char *buf, int offs)
1.1       kristaps  126: {
                    127:
1.72      kristaps  128:        if (MAN_HALT & m->flags)
                    129:                return(0);
                    130:
                    131:        return(('.' == buf[offs] || '\'' == buf[offs]) ?
1.79      kristaps  132:                        man_pmacro(m, ln, buf, offs) :
1.72      kristaps  133:                        man_ptext(m, ln, buf, offs));
1.1       kristaps  134: }
                    135:
                    136:
1.2       kristaps  137: static void
                    138: man_free1(struct man *man)
                    139: {
                    140:
                    141:        if (man->first)
1.54      kristaps  142:                man_node_delete(man, man->first);
1.2       kristaps  143:        if (man->meta.title)
                    144:                free(man->meta.title);
1.6       kristaps  145:        if (man->meta.source)
                    146:                free(man->meta.source);
1.75      kristaps  147:        if (man->meta.rawdate)
                    148:                free(man->meta.rawdate);
1.2       kristaps  149:        if (man->meta.vol)
                    150:                free(man->meta.vol);
1.68      kristaps  151:        if (man->meta.msec)
                    152:                free(man->meta.msec);
1.2       kristaps  153: }
                    154:
                    155:
1.45      kristaps  156: static void
1.2       kristaps  157: man_alloc1(struct man *m)
                    158: {
                    159:
1.44      kristaps  160:        memset(&m->meta, 0, sizeof(struct man_meta));
1.2       kristaps  161:        m->flags = 0;
1.45      kristaps  162:        m->last = mandoc_calloc(1, sizeof(struct man_node));
1.2       kristaps  163:        m->first = m->last;
                    164:        m->last->type = MAN_ROOT;
1.54      kristaps  165:        m->last->tok = MAN_MAX;
1.2       kristaps  166:        m->next = MAN_NEXT_CHILD;
                    167: }
                    168:
                    169:
1.1       kristaps  170: static int
                    171: man_node_append(struct man *man, struct man_node *p)
                    172: {
                    173:
                    174:        assert(man->last);
                    175:        assert(man->first);
                    176:        assert(MAN_ROOT != p->type);
                    177:
                    178:        switch (man->next) {
                    179:        case (MAN_NEXT_SIBLING):
                    180:                man->last->next = p;
                    181:                p->prev = man->last;
                    182:                p->parent = man->last->parent;
                    183:                break;
                    184:        case (MAN_NEXT_CHILD):
                    185:                man->last->child = p;
                    186:                p->parent = man->last;
                    187:                break;
                    188:        default:
                    189:                abort();
                    190:                /* NOTREACHED */
                    191:        }
1.22      kristaps  192:
1.54      kristaps  193:        assert(p->parent);
1.22      kristaps  194:        p->parent->nchild++;
1.1       kristaps  195:
1.29      kristaps  196:        if ( ! man_valid_pre(man, p))
                    197:                return(0);
                    198:
                    199:        switch (p->type) {
                    200:        case (MAN_HEAD):
                    201:                assert(MAN_BLOCK == p->parent->type);
                    202:                p->parent->head = p;
                    203:                break;
                    204:        case (MAN_BODY):
                    205:                assert(MAN_BLOCK == p->parent->type);
                    206:                p->parent->body = p;
                    207:                break;
                    208:        default:
                    209:                break;
                    210:        }
                    211:
1.2       kristaps  212:        man->last = p;
                    213:
1.1       kristaps  214:        switch (p->type) {
1.2       kristaps  215:        case (MAN_TEXT):
                    216:                if ( ! man_valid_post(man))
                    217:                        return(0);
1.1       kristaps  218:                break;
                    219:        default:
                    220:                break;
                    221:        }
                    222:
                    223:        return(1);
                    224: }
                    225:
                    226:
                    227: static struct man_node *
1.53      kristaps  228: man_node_alloc(int line, int pos, enum man_type type, enum mant tok)
1.1       kristaps  229: {
                    230:        struct man_node *p;
                    231:
1.45      kristaps  232:        p = mandoc_calloc(1, sizeof(struct man_node));
1.1       kristaps  233:        p->line = line;
                    234:        p->pos = pos;
                    235:        p->type = type;
1.16      kristaps  236:        p->tok = tok;
1.1       kristaps  237:        return(p);
                    238: }
                    239:
                    240:
                    241: int
1.53      kristaps  242: man_elem_alloc(struct man *m, int line, int pos, enum mant tok)
1.1       kristaps  243: {
                    244:        struct man_node *p;
                    245:
1.16      kristaps  246:        p = man_node_alloc(line, pos, MAN_ELEM, tok);
1.30      kristaps  247:        if ( ! man_node_append(m, p))
                    248:                return(0);
                    249:        m->next = MAN_NEXT_CHILD;
                    250:        return(1);
1.1       kristaps  251: }
                    252:
                    253:
                    254: int
1.53      kristaps  255: man_head_alloc(struct man *m, int line, int pos, enum mant tok)
1.29      kristaps  256: {
                    257:        struct man_node *p;
                    258:
                    259:        p = man_node_alloc(line, pos, MAN_HEAD, tok);
                    260:        if ( ! man_node_append(m, p))
                    261:                return(0);
                    262:        m->next = MAN_NEXT_CHILD;
                    263:        return(1);
                    264: }
                    265:
                    266:
                    267: int
1.53      kristaps  268: man_body_alloc(struct man *m, int line, int pos, enum mant tok)
1.29      kristaps  269: {
                    270:        struct man_node *p;
                    271:
                    272:        p = man_node_alloc(line, pos, MAN_BODY, tok);
                    273:        if ( ! man_node_append(m, p))
                    274:                return(0);
                    275:        m->next = MAN_NEXT_CHILD;
                    276:        return(1);
                    277: }
                    278:
                    279:
                    280: int
1.53      kristaps  281: man_block_alloc(struct man *m, int line, int pos, enum mant tok)
1.29      kristaps  282: {
                    283:        struct man_node *p;
                    284:
                    285:        p = man_node_alloc(line, pos, MAN_BLOCK, tok);
                    286:        if ( ! man_node_append(m, p))
                    287:                return(0);
                    288:        m->next = MAN_NEXT_CHILD;
                    289:        return(1);
                    290: }
                    291:
                    292:
1.61      kristaps  293: int
                    294: man_word_alloc(struct man *m, int line, int pos, const char *word)
1.1       kristaps  295: {
1.31      kristaps  296:        struct man_node *n;
1.61      kristaps  297:        size_t           sv, len;
                    298:
                    299:        len = strlen(word);
1.1       kristaps  300:
1.53      kristaps  301:        n = man_node_alloc(line, pos, MAN_TEXT, MAN_MAX);
1.45      kristaps  302:        n->string = mandoc_malloc(len + 1);
1.61      kristaps  303:        sv = strlcpy(n->string, word, len + 1);
1.31      kristaps  304:
                    305:        /* Prohibit truncation. */
                    306:        assert(sv < len + 1);
                    307:
                    308:        if ( ! man_node_append(m, n))
1.30      kristaps  309:                return(0);
1.61      kristaps  310:
1.30      kristaps  311:        m->next = MAN_NEXT_SIBLING;
                    312:        return(1);
1.1       kristaps  313: }
                    314:
                    315:
1.54      kristaps  316: /*
                    317:  * Free all of the resources held by a node.  This does NOT unlink a
                    318:  * node from its context; for that, see man_node_unlink().
                    319:  */
                    320: static void
1.1       kristaps  321: man_node_free(struct man_node *p)
                    322: {
                    323:
                    324:        if (p->string)
                    325:                free(p->string);
                    326:        free(p);
                    327: }
                    328:
                    329:
                    330: void
1.54      kristaps  331: man_node_delete(struct man *m, struct man_node *p)
1.1       kristaps  332: {
                    333:
1.54      kristaps  334:        while (p->child)
                    335:                man_node_delete(m, p->child);
                    336:
                    337:        man_node_unlink(m, p);
1.1       kristaps  338:        man_node_free(p);
                    339: }
                    340:
                    341:
                    342: static int
1.72      kristaps  343: man_ptext(struct man *m, int line, char *buf, int offs)
1.1       kristaps  344: {
1.61      kristaps  345:        int              i;
1.60      kristaps  346:
                    347:        /* Ignore bogus comments. */
                    348:
1.72      kristaps  349:        if ('\\' == buf[offs] &&
                    350:                        '.' == buf[offs + 1] &&
                    351:                        '"' == buf[offs + 2])
1.74      kristaps  352:                return(man_pmsg(m, line, offs, MANDOCERR_BADCOMMENT));
1.31      kristaps  353:
1.35      kristaps  354:        /* Literal free-form text whitespace is preserved. */
                    355:
                    356:        if (MAN_LITERAL & m->flags) {
1.72      kristaps  357:                if ( ! man_word_alloc(m, line, offs, buf + offs))
1.35      kristaps  358:                        return(0);
                    359:                goto descope;
                    360:        }
                    361:
1.61      kristaps  362:        /* Pump blank lines directly into the backend. */
1.31      kristaps  363:
1.72      kristaps  364:        for (i = offs; ' ' == buf[i]; i++)
1.31      kristaps  365:                /* Skip leading whitespace. */ ;
1.48      kristaps  366:
1.49      kristaps  367:        if ('\0' == buf[i]) {
1.61      kristaps  368:                /* Allocate a blank entry. */
1.72      kristaps  369:                if ( ! man_word_alloc(m, line, offs, ""))
1.31      kristaps  370:                        return(0);
                    371:                goto descope;
                    372:        }
                    373:
1.63      kristaps  374:        /*
                    375:         * Warn if the last un-escaped character is whitespace. Then
                    376:         * strip away the remaining spaces (tabs stay!).
                    377:         */
1.29      kristaps  378:
1.61      kristaps  379:        i = (int)strlen(buf);
                    380:        assert(i);
1.49      kristaps  381:
1.63      kristaps  382:        if (' ' == buf[i - 1] || '\t' == buf[i - 1]) {
1.64      kristaps  383:                if (i > 1 && '\\' != buf[i - 2])
1.74      kristaps  384:                        if ( ! man_pmsg(m, line, i - 1, MANDOCERR_EOLNSPACE))
1.49      kristaps  385:                                return(0);
1.63      kristaps  386:
                    387:                for (--i; i && ' ' == buf[i]; i--)
                    388:                        /* Spin back to non-space. */ ;
                    389:
                    390:                /* Jump ahead of escaped whitespace. */
                    391:                i += '\\' == buf[i] ? 2 : 1;
                    392:
                    393:                buf[i] = '\0';
                    394:        }
1.49      kristaps  395:
1.72      kristaps  396:        if ( ! man_word_alloc(m, line, offs, buf + offs))
1.1       kristaps  397:                return(0);
1.65      kristaps  398:
                    399:        /*
                    400:         * End-of-sentence check.  If the last character is an unescaped
                    401:         * EOS character, then flag the node as being the end of a
                    402:         * sentence.  The front-end will know how to interpret this.
                    403:         */
1.67      kristaps  404:
1.65      kristaps  405:        assert(i);
1.83      schwarze  406:        if (mandoc_eos(buf, (size_t)i, 0))
1.65      kristaps  407:                m->last->flags |= MAN_EOS;
1.31      kristaps  408:
                    409: descope:
1.11      kristaps  410:        /*
1.29      kristaps  411:         * Co-ordinate what happens with having a next-line scope open:
                    412:         * first close out the element scope (if applicable), then close
                    413:         * out the block scope (also if applicable).
1.11      kristaps  414:         */
                    415:
1.29      kristaps  416:        if (MAN_ELINE & m->flags) {
                    417:                m->flags &= ~MAN_ELINE;
1.74      kristaps  418:                if ( ! man_unscope(m, m->last->parent, MANDOCERR_MAX))
1.29      kristaps  419:                        return(0);
                    420:        }
                    421:
                    422:        if ( ! (MAN_BLINE & m->flags))
1.11      kristaps  423:                return(1);
1.29      kristaps  424:        m->flags &= ~MAN_BLINE;
1.11      kristaps  425:
1.74      kristaps  426:        if ( ! man_unscope(m, m->last->parent, MANDOCERR_MAX))
1.11      kristaps  427:                return(0);
1.72      kristaps  428:        return(man_body_alloc(m, line, offs, m->last->tok));
1.1       kristaps  429: }
                    430:
                    431:
                    432: int
1.79      kristaps  433: man_pmacro(struct man *m, int ln, char *buf, int offs)
1.1       kristaps  434: {
1.58      kristaps  435:        int              i, j, ppos;
1.53      kristaps  436:        enum mant        tok;
1.34      kristaps  437:        char             mac[5];
                    438:        struct man_node *n;
1.1       kristaps  439:
                    440:        /* Comments and empties are quickly ignored. */
                    441:
1.72      kristaps  442:        offs++;
                    443:
                    444:        if ('\0' == buf[offs])
1.46      kristaps  445:                return(1);
1.1       kristaps  446:
1.72      kristaps  447:        i = offs;
1.9       kristaps  448:
1.56      kristaps  449:        /*
                    450:         * Skip whitespace between the control character and initial
                    451:         * text.  "Whitespace" is both spaces and tabs.
                    452:         */
1.62      kristaps  453:
1.57      kristaps  454:        if (' ' == buf[i] || '\t' == buf[i]) {
1.9       kristaps  455:                i++;
1.56      kristaps  456:                while (buf[i] && (' ' == buf[i] || '\t' == buf[i]))
1.1       kristaps  457:                        i++;
1.48      kristaps  458:                if ('\0' == buf[i])
1.11      kristaps  459:                        goto out;
1.1       kristaps  460:        }
                    461:
1.10      kristaps  462:        ppos = i;
                    463:
1.86      schwarze  464:        /*
                    465:         * Copy the first word into a nil-terminated buffer.
                    466:         * Stop copying when a tab, space, or eoln is encountered.
                    467:         */
1.1       kristaps  468:
1.86      schwarze  469:        j = 0;
                    470:        while (j < 4 && '\0' != buf[i] && ' ' != buf[i] && '\t' != buf[i])
                    471:                mac[j++] = buf[i++];
1.46      kristaps  472:        mac[j] = '\0';
1.1       kristaps  473:
1.87      schwarze  474:        tok = (j > 0 && j < 4) ? man_hash_find(mac) : MAN_MAX;
                    475:        if (MAN_MAX == tok) {
1.90    ! kristaps  476:                man_vmsg(m, MANDOCERR_MACRO, ln, ppos, "%s", buf + ppos - 1);
1.12      kristaps  477:                return(1);
1.1       kristaps  478:        }
                    479:
                    480:        /* The macro is sane.  Jump to the next word. */
                    481:
                    482:        while (buf[i] && ' ' == buf[i])
                    483:                i++;
                    484:
1.62      kristaps  485:        /*
                    486:         * Trailing whitespace.  Note that tabs are allowed to be passed
                    487:         * into the parser as "text", so we only warn about spaces here.
                    488:         */
1.48      kristaps  489:
                    490:        if ('\0' == buf[i] && ' ' == buf[i - 1])
1.74      kristaps  491:                if ( ! man_pmsg(m, ln, i - 1, MANDOCERR_EOLNSPACE))
1.48      kristaps  492:                        goto err;
                    493:
1.50      kristaps  494:        /*
1.90    ! kristaps  495:         * Remove prior ELINE macro, as it's being clobbered by a new
1.51      kristaps  496:         * macro.  Note that NSCOPED macros do not close out ELINE
                    497:         * macros---they don't print text---so we let those slip by.
1.50      kristaps  498:         */
1.34      kristaps  499:
1.53      kristaps  500:        if ( ! (MAN_NSCOPED & man_macros[tok].flags) &&
1.51      kristaps  501:                        m->flags & MAN_ELINE) {
1.90    ! kristaps  502:                n = m->last;
        !           503:                assert(MAN_TEXT != n->type);
1.51      kristaps  504:
1.90    ! kristaps  505:                /* Remove repeated NSCOPED macros causing ELINE. */
1.51      kristaps  506:
1.90    ! kristaps  507:                if (MAN_NSCOPED & man_macros[n->tok].flags)
        !           508:                        n = n->parent;
1.51      kristaps  509:
1.90    ! kristaps  510:                man_vmsg(m, MANDOCERR_LINESCOPE, n->line, n->pos,
        !           511:                                "%s", man_macronames[n->tok]);
1.34      kristaps  512:
1.54      kristaps  513:                man_node_delete(m, n);
1.34      kristaps  514:                m->flags &= ~MAN_ELINE;
                    515:        }
                    516:
1.59      kristaps  517:        /*
                    518:         * Save the fact that we're in the next-line for a block.  In
                    519:         * this way, embedded roff instructions can "remember" state
                    520:         * when they exit.
                    521:         */
                    522:
                    523:        if (MAN_BLINE & m->flags)
                    524:                m->flags |= MAN_BPLINE;
                    525:
                    526:        /* Call to handler... */
1.1       kristaps  527:
1.53      kristaps  528:        assert(man_macros[tok].fp);
1.79      kristaps  529:        if ( ! (*man_macros[tok].fp)(m, tok, ln, ppos, &i, buf))
1.1       kristaps  530:                goto err;
                    531:
1.11      kristaps  532: out:
1.50      kristaps  533:        /*
                    534:         * We weren't in a block-line scope when entering the
                    535:         * above-parsed macro, so return.
                    536:         */
                    537:
1.58      kristaps  538:        if ( ! (MAN_BPLINE & m->flags)) {
1.50      kristaps  539:                m->flags &= ~MAN_ILINE;
1.29      kristaps  540:                return(1);
1.50      kristaps  541:        }
1.58      kristaps  542:        m->flags &= ~MAN_BPLINE;
1.50      kristaps  543:
                    544:        /*
                    545:         * If we're in a block scope, then allow this macro to slip by
                    546:         * without closing scope around it.
                    547:         */
                    548:
                    549:        if (MAN_ILINE & m->flags) {
                    550:                m->flags &= ~MAN_ILINE;
                    551:                return(1);
                    552:        }
1.29      kristaps  553:
                    554:        /*
                    555:         * If we've opened a new next-line element scope, then return
                    556:         * now, as the next line will close out the block scope.
                    557:         */
                    558:
                    559:        if (MAN_ELINE & m->flags)
                    560:                return(1);
                    561:
                    562:        /* Close out the block scope opened in the prior line.  */
1.11      kristaps  563:
1.29      kristaps  564:        assert(MAN_BLINE & m->flags);
                    565:        m->flags &= ~MAN_BLINE;
1.11      kristaps  566:
1.74      kristaps  567:        if ( ! man_unscope(m, m->last->parent, MANDOCERR_MAX))
1.29      kristaps  568:                return(0);
1.72      kristaps  569:        return(man_body_alloc(m, ln, offs, m->last->tok));
1.1       kristaps  570:
                    571: err:   /* Error out. */
                    572:
1.2       kristaps  573:        m->flags |= MAN_HALT;
1.1       kristaps  574:        return(0);
                    575: }
1.3       kristaps  576:
1.4       kristaps  577:
                    578: int
1.74      kristaps  579: man_vmsg(struct man *man, enum mandocerr t,
                    580:                int ln, int pos, const char *fmt, ...)
1.4       kristaps  581: {
                    582:        char             buf[256];
                    583:        va_list          ap;
                    584:
                    585:        va_start(ap, fmt);
1.74      kristaps  586:        vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1.4       kristaps  587:        va_end(ap);
1.74      kristaps  588:        return((*man->msg)(t, man->data, ln, pos, buf));
1.51      kristaps  589: }
                    590:
                    591:
1.54      kristaps  592: /*
                    593:  * Unlink a node from its context.  If "m" is provided, the last parse
                    594:  * point will also be adjusted accordingly.
                    595:  */
                    596: static void
1.51      kristaps  597: man_node_unlink(struct man *m, struct man_node *n)
                    598: {
                    599:
1.54      kristaps  600:        /* Adjust siblings. */
                    601:
                    602:        if (n->prev)
1.51      kristaps  603:                n->prev->next = n->next;
1.54      kristaps  604:        if (n->next)
                    605:                n->next->prev = n->prev;
                    606:
                    607:        /* Adjust parent. */
                    608:
                    609:        if (n->parent) {
                    610:                n->parent->nchild--;
                    611:                if (n->parent->child == n)
                    612:                        n->parent->child = n->prev ? n->prev : n->next;
                    613:        }
                    614:
                    615:        /* Adjust parse point, if applicable. */
                    616:
                    617:        if (m && m->last == n) {
                    618:                /*XXX: this can occur when bailing from validation. */
                    619:                /*assert(NULL == n->next);*/
                    620:                if (n->prev) {
1.51      kristaps  621:                        m->last = n->prev;
                    622:                        m->next = MAN_NEXT_SIBLING;
1.54      kristaps  623:                } else {
1.51      kristaps  624:                        m->last = n->parent;
                    625:                        m->next = MAN_NEXT_CHILD;
                    626:                }
                    627:        }
                    628:
1.54      kristaps  629:        if (m && m->first == n)
                    630:                m->first = NULL;
1.23      kristaps  631: }

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