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Annotation of mandoc/man.c, Revision 1.48

1.48    ! kristaps    1: /*     $Id: man.c,v 1.47 2010/01/01 17:14:27 kristaps Exp $ */
1.1       kristaps    2: /*
1.19      kristaps    3:  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
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 <ctype.h>
                     25: #include <stdarg.h>
                     26: #include <stdlib.h>
                     27: #include <stdio.h>
                     28: #include <string.h>
                     29:
                     30: #include "libman.h"
1.45      kristaps   31: #include "libmandoc.h"
1.1       kristaps   32:
1.27      kristaps   33: const  char *const __man_merrnames[WERRMAX] = {
                     34:        "invalid character", /* WNPRINT */
                     35:        "invalid manual section", /* WMSEC */
                     36:        "invalid date format", /* WDATE */
                     37:        "scope of prior line violated", /* WLNSCOPE */
                     38:        "trailing whitespace", /* WTSPACE */
                     39:        "unterminated quoted parameter", /* WTQUOTE */
                     40:        "document has no body", /* WNODATA */
                     41:        "document has no title/section", /* WNOTITLE */
                     42:        "invalid escape sequence", /* WESCAPE */
1.28      kristaps   43:        "invalid number format", /* WNUMFMT */
1.29      kristaps   44:        "expected block head arguments", /* WHEADARGS */
                     45:        "expected block body arguments", /* WBODYARGS */
                     46:        "expected empty block head", /* WNHEADARGS */
                     47:        "ill-formed macro", /* WMACROFORM */
1.30      kristaps   48:        "scope open on exit", /* WEXITSCOPE */
1.35      kristaps   49:        "no scope context", /* WNOSCOPE */
                     50:        "literal context already open", /* WOLITERAL */
                     51:        "no literal context open" /* WNLITERAL */
1.27      kristaps   52: };
                     53:
1.1       kristaps   54: const  char *const __man_macronames[MAN_MAX] = {
1.21      kristaps   55:        "br",           "TH",           "SH",           "SS",
1.1       kristaps   56:        "TP",           "LP",           "PP",           "P",
                     57:        "IP",           "HP",           "SM",           "SB",
                     58:        "BI",           "IB",           "BR",           "RB",
1.11      kristaps   59:        "R",            "B",            "I",            "IR",
1.29      kristaps   60:        "RI",           "na",           "i",            "sp",
1.30      kristaps   61:        "nf",           "fi",           "r",            "RE",
1.42      kristaps   62:        "RS",           "DT",           "UC",           "PD"
1.1       kristaps   63:        };
                     64:
                     65: const  char * const *man_macronames = __man_macronames;
                     66:
1.16      kristaps   67: static struct man_node *man_node_alloc(int, int,
                     68:                                enum man_type, int);
1.1       kristaps   69: static int              man_node_append(struct man *,
                     70:                                struct man_node *);
                     71: static int              man_ptext(struct man *, int, char *);
                     72: static int              man_pmacro(struct man *, int, char *);
1.2       kristaps   73: static void             man_free1(struct man *);
1.45      kristaps   74: static void             man_alloc1(struct man *);
1.31      kristaps   75: static int              pstring(struct man *, int, int,
                     76:                                const char *, size_t);
1.43      kristaps   77: static int              macrowarn(struct man *, int, const char *);
1.1       kristaps   78:
                     79:
                     80: const struct man_node *
1.2       kristaps   81: man_node(const struct man *m)
1.1       kristaps   82: {
                     83:
1.2       kristaps   84:        return(MAN_HALT & m->flags ? NULL : m->first);
1.1       kristaps   85: }
                     86:
                     87:
                     88: const struct man_meta *
1.2       kristaps   89: man_meta(const struct man *m)
1.1       kristaps   90: {
                     91:
1.2       kristaps   92:        return(MAN_HALT & m->flags ? NULL : &m->meta);
1.1       kristaps   93: }
                     94:
                     95:
1.45      kristaps   96: void
1.1       kristaps   97: man_reset(struct man *man)
                     98: {
                     99:
1.2       kristaps  100:        man_free1(man);
1.45      kristaps  101:        man_alloc1(man);
1.1       kristaps  102: }
                    103:
                    104:
                    105: void
                    106: man_free(struct man *man)
                    107: {
                    108:
1.2       kristaps  109:        man_free1(man);
1.1       kristaps  110:        free(man);
                    111: }
                    112:
                    113:
                    114: struct man *
1.7       kristaps  115: man_alloc(void *data, int pflags, const struct man_cb *cb)
1.1       kristaps  116: {
                    117:        struct man      *p;
                    118:
1.45      kristaps  119:        p = mandoc_calloc(1, sizeof(struct man));
1.2       kristaps  120:
1.45      kristaps  121:        if (cb)
                    122:                memcpy(&p->cb, cb, sizeof(struct man_cb));
1.1       kristaps  123:
1.40      kristaps  124:        man_hash_init();
1.4       kristaps  125:        p->data = data;
1.7       kristaps  126:        p->pflags = pflags;
1.45      kristaps  127:
                    128:        man_alloc1(p);
1.1       kristaps  129:        return(p);
                    130: }
                    131:
                    132:
                    133: int
                    134: man_endparse(struct man *m)
                    135: {
                    136:
1.3       kristaps  137:        if (MAN_HALT & m->flags)
                    138:                return(0);
                    139:        else if (man_macroend(m))
                    140:                return(1);
                    141:        m->flags |= MAN_HALT;
                    142:        return(0);
1.1       kristaps  143: }
                    144:
                    145:
                    146: int
                    147: man_parseln(struct man *m, int ln, char *buf)
                    148: {
                    149:
                    150:        return('.' == *buf ?
                    151:                        man_pmacro(m, ln, buf) :
                    152:                        man_ptext(m, ln, buf));
                    153: }
                    154:
                    155:
1.2       kristaps  156: static void
                    157: man_free1(struct man *man)
                    158: {
                    159:
                    160:        if (man->first)
                    161:                man_node_freelist(man->first);
                    162:        if (man->meta.title)
                    163:                free(man->meta.title);
1.6       kristaps  164:        if (man->meta.source)
                    165:                free(man->meta.source);
1.2       kristaps  166:        if (man->meta.vol)
                    167:                free(man->meta.vol);
                    168: }
                    169:
                    170:
1.45      kristaps  171: static void
1.2       kristaps  172: man_alloc1(struct man *m)
                    173: {
                    174:
1.44      kristaps  175:        memset(&m->meta, 0, sizeof(struct man_meta));
1.2       kristaps  176:        m->flags = 0;
1.45      kristaps  177:        m->last = mandoc_calloc(1, sizeof(struct man_node));
1.2       kristaps  178:        m->first = m->last;
                    179:        m->last->type = MAN_ROOT;
                    180:        m->next = MAN_NEXT_CHILD;
                    181: }
                    182:
                    183:
1.1       kristaps  184: static int
                    185: man_node_append(struct man *man, struct man_node *p)
                    186: {
                    187:
                    188:        assert(man->last);
                    189:        assert(man->first);
                    190:        assert(MAN_ROOT != p->type);
                    191:
                    192:        switch (man->next) {
                    193:        case (MAN_NEXT_SIBLING):
                    194:                man->last->next = p;
                    195:                p->prev = man->last;
                    196:                p->parent = man->last->parent;
                    197:                break;
                    198:        case (MAN_NEXT_CHILD):
                    199:                man->last->child = p;
                    200:                p->parent = man->last;
                    201:                break;
                    202:        default:
                    203:                abort();
                    204:                /* NOTREACHED */
                    205:        }
1.22      kristaps  206:
                    207:        p->parent->nchild++;
1.1       kristaps  208:
1.29      kristaps  209:        if ( ! man_valid_pre(man, p))
                    210:                return(0);
                    211:
                    212:        switch (p->type) {
                    213:        case (MAN_HEAD):
                    214:                assert(MAN_BLOCK == p->parent->type);
                    215:                p->parent->head = p;
                    216:                break;
                    217:        case (MAN_BODY):
                    218:                assert(MAN_BLOCK == p->parent->type);
                    219:                p->parent->body = p;
                    220:                break;
                    221:        default:
                    222:                break;
                    223:        }
                    224:
1.2       kristaps  225:        man->last = p;
                    226:
1.1       kristaps  227:        switch (p->type) {
1.2       kristaps  228:        case (MAN_TEXT):
                    229:                if ( ! man_valid_post(man))
                    230:                        return(0);
                    231:                if ( ! man_action_post(man))
                    232:                        return(0);
1.1       kristaps  233:                break;
                    234:        default:
                    235:                break;
                    236:        }
                    237:
                    238:        return(1);
                    239: }
                    240:
                    241:
                    242: static struct man_node *
1.16      kristaps  243: man_node_alloc(int line, int pos, enum man_type type, int tok)
1.1       kristaps  244: {
                    245:        struct man_node *p;
                    246:
1.45      kristaps  247:        p = mandoc_calloc(1, sizeof(struct man_node));
1.1       kristaps  248:        p->line = line;
                    249:        p->pos = pos;
                    250:        p->type = type;
1.16      kristaps  251:        p->tok = tok;
1.1       kristaps  252:        return(p);
                    253: }
                    254:
                    255:
                    256: int
1.30      kristaps  257: man_elem_alloc(struct man *m, int line, int pos, int tok)
1.1       kristaps  258: {
                    259:        struct man_node *p;
                    260:
1.16      kristaps  261:        p = man_node_alloc(line, pos, MAN_ELEM, tok);
1.30      kristaps  262:        if ( ! man_node_append(m, p))
                    263:                return(0);
                    264:        m->next = MAN_NEXT_CHILD;
                    265:        return(1);
1.1       kristaps  266: }
                    267:
                    268:
                    269: int
1.29      kristaps  270: man_head_alloc(struct man *m, int line, int pos, int tok)
                    271: {
                    272:        struct man_node *p;
                    273:
                    274:        p = man_node_alloc(line, pos, MAN_HEAD, tok);
                    275:        if ( ! man_node_append(m, p))
                    276:                return(0);
                    277:        m->next = MAN_NEXT_CHILD;
                    278:        return(1);
                    279: }
                    280:
                    281:
                    282: int
                    283: man_body_alloc(struct man *m, int line, int pos, int tok)
                    284: {
                    285:        struct man_node *p;
                    286:
                    287:        p = man_node_alloc(line, pos, MAN_BODY, tok);
                    288:        if ( ! man_node_append(m, p))
                    289:                return(0);
                    290:        m->next = MAN_NEXT_CHILD;
                    291:        return(1);
                    292: }
                    293:
                    294:
                    295: int
                    296: man_block_alloc(struct man *m, int line, int pos, int tok)
                    297: {
                    298:        struct man_node *p;
                    299:
                    300:        p = man_node_alloc(line, pos, MAN_BLOCK, tok);
                    301:        if ( ! man_node_append(m, p))
                    302:                return(0);
                    303:        m->next = MAN_NEXT_CHILD;
                    304:        return(1);
                    305: }
                    306:
                    307:
1.31      kristaps  308: static int
                    309: pstring(struct man *m, int line, int pos,
                    310:                const char *p, size_t len)
1.1       kristaps  311: {
1.31      kristaps  312:        struct man_node *n;
                    313:        size_t           sv;
1.1       kristaps  314:
1.31      kristaps  315:        n = man_node_alloc(line, pos, MAN_TEXT, -1);
1.45      kristaps  316:        n->string = mandoc_malloc(len + 1);
1.31      kristaps  317:        sv = strlcpy(n->string, p, len + 1);
                    318:
                    319:        /* Prohibit truncation. */
                    320:        assert(sv < len + 1);
                    321:
                    322:        if ( ! man_node_append(m, n))
1.30      kristaps  323:                return(0);
                    324:        m->next = MAN_NEXT_SIBLING;
                    325:        return(1);
1.1       kristaps  326: }
                    327:
                    328:
1.31      kristaps  329: int
                    330: man_word_alloc(struct man *m, int line, int pos, const char *word)
                    331: {
                    332:
                    333:        return(pstring(m, line, pos, word, strlen(word)));
                    334: }
                    335:
                    336:
1.1       kristaps  337: void
                    338: man_node_free(struct man_node *p)
                    339: {
                    340:
                    341:        if (p->string)
                    342:                free(p->string);
1.24      kristaps  343:        if (p->parent)
                    344:                p->parent->nchild--;
1.1       kristaps  345:        free(p);
                    346: }
                    347:
                    348:
                    349: void
                    350: man_node_freelist(struct man_node *p)
                    351: {
1.37      kristaps  352:        struct man_node *n;
1.1       kristaps  353:
                    354:        if (p->child)
                    355:                man_node_freelist(p->child);
1.24      kristaps  356:        assert(0 == p->nchild);
1.37      kristaps  357:        n = p->next;
1.1       kristaps  358:        man_node_free(p);
1.37      kristaps  359:        if (n)
                    360:                man_node_freelist(n);
1.1       kristaps  361: }
                    362:
                    363:
                    364: static int
                    365: man_ptext(struct man *m, int line, char *buf)
                    366: {
1.31      kristaps  367:        int              i, j;
                    368:
1.35      kristaps  369:        /* Literal free-form text whitespace is preserved. */
                    370:
                    371:        if (MAN_LITERAL & m->flags) {
                    372:                if ( ! man_word_alloc(m, line, 0, buf))
                    373:                        return(0);
                    374:                goto descope;
                    375:        }
                    376:
1.31      kristaps  377:        /* First de-chunk and allocate words. */
                    378:
                    379:        for (i = 0; ' ' == buf[i]; i++)
                    380:                /* Skip leading whitespace. */ ;
1.48    ! kristaps  381:
1.31      kristaps  382:        if (0 == buf[i]) {
                    383:                if ( ! pstring(m, line, 0, &buf[i], 0))
                    384:                        return(0);
                    385:                goto descope;
                    386:        }
                    387:
                    388:        for (j = i; buf[i]; i++) {
                    389:                if (' ' != buf[i])
                    390:                        continue;
                    391:
                    392:                /* Escaped whitespace. */
                    393:                if (i && ' ' == buf[i] && '\\' == buf[i - 1])
                    394:                        continue;
1.1       kristaps  395:
1.31      kristaps  396:                buf[i++] = 0;
                    397:                if ( ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
                    398:                        return(0);
1.29      kristaps  399:
1.31      kristaps  400:                for ( ; ' ' == buf[i]; i++)
                    401:                        /* Skip trailing whitespace. */ ;
1.30      kristaps  402:
1.31      kristaps  403:                j = i;
                    404:                if (0 == buf[i])
                    405:                        break;
                    406:        }
                    407:
                    408:        if (j != i && ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
1.1       kristaps  409:                return(0);
1.31      kristaps  410:
                    411: descope:
1.11      kristaps  412:
                    413:        /*
1.29      kristaps  414:         * Co-ordinate what happens with having a next-line scope open:
                    415:         * first close out the element scope (if applicable), then close
                    416:         * out the block scope (also if applicable).
1.11      kristaps  417:         */
                    418:
1.29      kristaps  419:        if (MAN_ELINE & m->flags) {
                    420:                m->flags &= ~MAN_ELINE;
                    421:                if ( ! man_unscope(m, m->last->parent))
                    422:                        return(0);
                    423:        }
                    424:
                    425:        if ( ! (MAN_BLINE & m->flags))
1.11      kristaps  426:                return(1);
1.29      kristaps  427:        m->flags &= ~MAN_BLINE;
1.11      kristaps  428:
1.29      kristaps  429:        if ( ! man_unscope(m, m->last->parent))
1.11      kristaps  430:                return(0);
1.29      kristaps  431:        return(man_body_alloc(m, line, 0, m->last->tok));
1.1       kristaps  432: }
                    433:
                    434:
1.43      kristaps  435: static int
                    436: macrowarn(struct man *m, int ln, const char *buf)
                    437: {
                    438:        if ( ! (MAN_IGN_MACRO & m->pflags))
                    439:                return(man_verr(m, ln, 0,
                    440:                                "unknown macro: %s%s",
                    441:                                buf, strlen(buf) > 3 ? "..." : ""));
                    442:        return(man_vwarn(m, ln, 0, "unknown macro: %s%s",
                    443:                                buf, strlen(buf) > 3 ? "..." : ""));
                    444: }
                    445:
                    446:
1.1       kristaps  447: int
                    448: man_pmacro(struct man *m, int ln, char *buf)
                    449: {
1.34      kristaps  450:        int              i, j, c, ppos, fl;
                    451:        char             mac[5];
                    452:        struct man_node *n;
1.1       kristaps  453:
                    454:        /* Comments and empties are quickly ignored. */
                    455:
1.29      kristaps  456:        fl = m->flags;
1.11      kristaps  457:
1.46      kristaps  458:        if ('\0' == buf[1])
                    459:                return(1);
1.1       kristaps  460:
1.9       kristaps  461:        i = 1;
                    462:
                    463:        if (' ' == buf[i]) {
                    464:                i++;
1.1       kristaps  465:                while (buf[i] && ' ' == buf[i])
                    466:                        i++;
1.48    ! kristaps  467:                if ('\0' == buf[i])
1.11      kristaps  468:                        goto out;
1.1       kristaps  469:        }
                    470:
1.10      kristaps  471:        ppos = i;
                    472:
1.1       kristaps  473:        /* Copy the first word into a nil-terminated buffer. */
                    474:
1.10      kristaps  475:        for (j = 0; j < 4; j++, i++) {
1.48    ! kristaps  476:                if ('\0' == (mac[j] = buf[i]))
1.1       kristaps  477:                        break;
1.10      kristaps  478:                else if (' ' == buf[i])
1.1       kristaps  479:                        break;
1.38      kristaps  480:
                    481:                /* Check for invalid characters. */
                    482:
                    483:                if (isgraph((u_char)buf[i]))
                    484:                        continue;
                    485:                return(man_perr(m, ln, i, WNPRINT));
1.1       kristaps  486:        }
                    487:
1.46      kristaps  488:        mac[j] = '\0';
1.1       kristaps  489:
1.9       kristaps  490:        if (j == 4 || j < 1) {
1.7       kristaps  491:                if ( ! (MAN_IGN_MACRO & m->pflags)) {
1.29      kristaps  492:                        (void)man_perr(m, ln, ppos, WMACROFORM);
1.7       kristaps  493:                        goto err;
                    494:                }
1.29      kristaps  495:                if ( ! man_pwarn(m, ln, ppos, WMACROFORM))
1.7       kristaps  496:                        goto err;
1.12      kristaps  497:                return(1);
1.7       kristaps  498:        }
1.1       kristaps  499:
1.40      kristaps  500:        if (MAN_MAX == (c = man_hash_find(mac))) {
1.43      kristaps  501:                if ( ! macrowarn(m, ln, mac))
1.7       kristaps  502:                        goto err;
1.12      kristaps  503:                return(1);
1.1       kristaps  504:        }
                    505:
                    506:        /* The macro is sane.  Jump to the next word. */
                    507:
                    508:        while (buf[i] && ' ' == buf[i])
                    509:                i++;
                    510:
1.48    ! kristaps  511:        /* Trailing whitespace? */
        !           512:
        !           513:        if ('\0' == buf[i] && ' ' == buf[i - 1])
        !           514:                if ( ! man_pwarn(m, ln, i - 1, WTSPACE))
        !           515:                        goto err;
        !           516:
1.34      kristaps  517:        /* Remove prior ELINE macro, if applicable. */
                    518:
                    519:        if (m->flags & MAN_ELINE) {
                    520:                n = m->last;
                    521:                assert(NULL == n->child);
1.37      kristaps  522:                assert(0 == n->nchild);
1.34      kristaps  523:                if ( ! man_nwarn(m, n, WLNSCOPE))
                    524:                        return(0);
                    525:
                    526:                if (n->prev) {
                    527:                        assert(n != n->parent->child);
                    528:                        assert(n == n->prev->next);
                    529:                        n->prev->next = NULL;
                    530:                        m->last = n->prev;
1.37      kristaps  531:                        m->next = MAN_NEXT_SIBLING;
1.34      kristaps  532:                } else {
                    533:                        assert(n == n->parent->child);
                    534:                        n->parent->child = NULL;
                    535:                        m->last = n->parent;
1.37      kristaps  536:                        m->next = MAN_NEXT_CHILD;
1.34      kristaps  537:                }
                    538:
                    539:                man_node_free(n);
                    540:                m->flags &= ~MAN_ELINE;
                    541:        }
                    542:
1.1       kristaps  543:        /* Begin recursive parse sequence. */
                    544:
1.29      kristaps  545:        assert(man_macros[c].fp);
                    546:
                    547:        if ( ! (*man_macros[c].fp)(m, c, ln, ppos, &i, buf))
1.1       kristaps  548:                goto err;
                    549:
1.11      kristaps  550: out:
1.29      kristaps  551:        if ( ! (MAN_BLINE & fl))
                    552:                return(1);
                    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:
1.29      kristaps  567:        if ( ! man_unscope(m, m->last->parent))
                    568:                return(0);
                    569:        return(man_body_alloc(m, ln, 0, 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
                    579: man_verr(struct man *man, int ln, int pos, const char *fmt, ...)
                    580: {
                    581:        char             buf[256];
                    582:        va_list          ap;
                    583:
                    584:        if (NULL == man->cb.man_err)
                    585:                return(0);
                    586:
                    587:        va_start(ap, fmt);
                    588:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    589:        va_end(ap);
                    590:        return((*man->cb.man_err)(man->data, ln, pos, buf));
                    591: }
                    592:
                    593:
                    594: int
                    595: man_vwarn(struct man *man, int ln, int pos, const char *fmt, ...)
                    596: {
                    597:        char             buf[256];
                    598:        va_list          ap;
                    599:
                    600:        if (NULL == man->cb.man_warn)
                    601:                return(0);
                    602:
                    603:        va_start(ap, fmt);
                    604:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    605:        va_end(ap);
                    606:        return((*man->cb.man_warn)(man->data, ln, pos, buf));
                    607: }
                    608:
                    609:
1.23      kristaps  610: int
1.27      kristaps  611: man_err(struct man *m, int line, int pos, int iserr, enum merr type)
1.23      kristaps  612: {
                    613:        const char       *p;
                    614:
1.27      kristaps  615:        p = __man_merrnames[(int)type];
1.23      kristaps  616:        assert(p);
                    617:
                    618:        if (iserr)
                    619:                return(man_verr(m, line, pos, p));
                    620:
                    621:        return(man_vwarn(m, line, pos, p));
                    622: }

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