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Annotation of mandoc/man.c, Revision 1.77

1.77    ! kristaps    1: /*     $Id: man.c,v 1.76 2010/06/19 20:46:28 kristaps Exp $ */
1.1       kristaps    2: /*
1.76      kristaps    3:  * Copyright (c) 2008, 2009 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 <ctype.h>
                     25: #include <stdarg.h>
                     26: #include <stdlib.h>
                     27: #include <stdio.h>
                     28: #include <string.h>
                     29:
1.74      kristaps   30: #include "mandoc.h"
1.77    ! kristaps   31: #include "regs.h"
1.1       kristaps   32: #include "libman.h"
1.45      kristaps   33: #include "libmandoc.h"
1.1       kristaps   34:
                     35: const  char *const __man_macronames[MAN_MAX] = {
1.21      kristaps   36:        "br",           "TH",           "SH",           "SS",
1.1       kristaps   37:        "TP",           "LP",           "PP",           "P",
                     38:        "IP",           "HP",           "SM",           "SB",
                     39:        "BI",           "IB",           "BR",           "RB",
1.11      kristaps   40:        "R",            "B",            "I",            "IR",
1.29      kristaps   41:        "RI",           "na",           "i",            "sp",
1.30      kristaps   42:        "nf",           "fi",           "r",            "RE",
1.52      kristaps   43:        "RS",           "DT",           "UC",           "PD",
1.73      joerg      44:        "Sp",           "Vb",           "Ve",           "AT",
1.1       kristaps   45:        };
                     46:
                     47: const  char * const *man_macronames = __man_macronames;
                     48:
1.16      kristaps   49: static struct man_node *man_node_alloc(int, int,
1.53      kristaps   50:                                enum man_type, enum mant);
1.1       kristaps   51: static int              man_node_append(struct man *,
                     52:                                struct man_node *);
1.54      kristaps   53: static void             man_node_free(struct man_node *);
                     54: static void             man_node_unlink(struct man *,
                     55:                                struct man_node *);
1.72      kristaps   56: static int              man_ptext(struct man *, int, char *, int);
                     57: static int              man_pmacro(struct man *, int, char *, int);
1.2       kristaps   58: static void             man_free1(struct man *);
1.45      kristaps   59: static void             man_alloc1(struct man *);
1.72      kristaps   60: static int              macrowarn(struct man *, int, const char *, int);
1.1       kristaps   61:
                     62:
                     63: const struct man_node *
1.2       kristaps   64: man_node(const struct man *m)
1.1       kristaps   65: {
                     66:
1.2       kristaps   67:        return(MAN_HALT & m->flags ? NULL : m->first);
1.1       kristaps   68: }
                     69:
                     70:
                     71: const struct man_meta *
1.2       kristaps   72: man_meta(const struct man *m)
1.1       kristaps   73: {
                     74:
1.2       kristaps   75:        return(MAN_HALT & m->flags ? NULL : &m->meta);
1.1       kristaps   76: }
                     77:
                     78:
1.45      kristaps   79: void
1.1       kristaps   80: man_reset(struct man *man)
                     81: {
                     82:
1.2       kristaps   83:        man_free1(man);
1.45      kristaps   84:        man_alloc1(man);
1.1       kristaps   85: }
                     86:
                     87:
                     88: void
                     89: man_free(struct man *man)
                     90: {
                     91:
1.2       kristaps   92:        man_free1(man);
1.1       kristaps   93:        free(man);
                     94: }
                     95:
                     96:
                     97: struct man *
1.74      kristaps   98: man_alloc(void *data, int pflags, mandocmsg msg)
1.1       kristaps   99: {
                    100:        struct man      *p;
                    101:
1.45      kristaps  102:        p = mandoc_calloc(1, sizeof(struct man));
1.2       kristaps  103:
1.40      kristaps  104:        man_hash_init();
1.4       kristaps  105:        p->data = data;
1.7       kristaps  106:        p->pflags = pflags;
1.74      kristaps  107:        p->msg = msg;
1.45      kristaps  108:
                    109:        man_alloc1(p);
1.1       kristaps  110:        return(p);
                    111: }
                    112:
                    113:
                    114: int
                    115: man_endparse(struct man *m)
                    116: {
                    117:
1.3       kristaps  118:        if (MAN_HALT & m->flags)
                    119:                return(0);
                    120:        else if (man_macroend(m))
                    121:                return(1);
                    122:        m->flags |= MAN_HALT;
                    123:        return(0);
1.1       kristaps  124: }
                    125:
                    126:
                    127: int
1.77    ! kristaps  128: man_parseln(struct man *m, const struct regset *regs,
        !           129:                int ln, char *buf, int offs)
1.1       kristaps  130: {
                    131:
1.72      kristaps  132:        if (MAN_HALT & m->flags)
                    133:                return(0);
                    134:
                    135:        return(('.' == buf[offs] || '\'' == buf[offs]) ?
                    136:                        man_pmacro(m, ln, buf, offs) :
                    137:                        man_ptext(m, ln, buf, offs));
1.1       kristaps  138: }
                    139:
                    140:
1.2       kristaps  141: static void
                    142: man_free1(struct man *man)
                    143: {
                    144:
                    145:        if (man->first)
1.54      kristaps  146:                man_node_delete(man, man->first);
1.2       kristaps  147:        if (man->meta.title)
                    148:                free(man->meta.title);
1.6       kristaps  149:        if (man->meta.source)
                    150:                free(man->meta.source);
1.75      kristaps  151:        if (man->meta.rawdate)
                    152:                free(man->meta.rawdate);
1.2       kristaps  153:        if (man->meta.vol)
                    154:                free(man->meta.vol);
1.68      kristaps  155:        if (man->meta.msec)
                    156:                free(man->meta.msec);
1.2       kristaps  157: }
                    158:
                    159:
1.45      kristaps  160: static void
1.2       kristaps  161: man_alloc1(struct man *m)
                    162: {
                    163:
1.44      kristaps  164:        memset(&m->meta, 0, sizeof(struct man_meta));
1.2       kristaps  165:        m->flags = 0;
1.45      kristaps  166:        m->last = mandoc_calloc(1, sizeof(struct man_node));
1.2       kristaps  167:        m->first = m->last;
                    168:        m->last->type = MAN_ROOT;
1.54      kristaps  169:        m->last->tok = MAN_MAX;
1.2       kristaps  170:        m->next = MAN_NEXT_CHILD;
                    171: }
                    172:
                    173:
1.1       kristaps  174: static int
                    175: man_node_append(struct man *man, struct man_node *p)
                    176: {
                    177:
                    178:        assert(man->last);
                    179:        assert(man->first);
                    180:        assert(MAN_ROOT != p->type);
                    181:
                    182:        switch (man->next) {
                    183:        case (MAN_NEXT_SIBLING):
                    184:                man->last->next = p;
                    185:                p->prev = man->last;
                    186:                p->parent = man->last->parent;
                    187:                break;
                    188:        case (MAN_NEXT_CHILD):
                    189:                man->last->child = p;
                    190:                p->parent = man->last;
                    191:                break;
                    192:        default:
                    193:                abort();
                    194:                /* NOTREACHED */
                    195:        }
1.22      kristaps  196:
1.54      kristaps  197:        assert(p->parent);
1.22      kristaps  198:        p->parent->nchild++;
1.1       kristaps  199:
1.29      kristaps  200:        if ( ! man_valid_pre(man, p))
                    201:                return(0);
                    202:
                    203:        switch (p->type) {
                    204:        case (MAN_HEAD):
                    205:                assert(MAN_BLOCK == p->parent->type);
                    206:                p->parent->head = p;
                    207:                break;
                    208:        case (MAN_BODY):
                    209:                assert(MAN_BLOCK == p->parent->type);
                    210:                p->parent->body = p;
                    211:                break;
                    212:        default:
                    213:                break;
                    214:        }
                    215:
1.2       kristaps  216:        man->last = p;
                    217:
1.1       kristaps  218:        switch (p->type) {
1.2       kristaps  219:        case (MAN_TEXT):
                    220:                if ( ! man_valid_post(man))
                    221:                        return(0);
                    222:                if ( ! man_action_post(man))
                    223:                        return(0);
1.1       kristaps  224:                break;
                    225:        default:
                    226:                break;
                    227:        }
                    228:
                    229:        return(1);
                    230: }
                    231:
                    232:
                    233: static struct man_node *
1.53      kristaps  234: man_node_alloc(int line, int pos, enum man_type type, enum mant tok)
1.1       kristaps  235: {
                    236:        struct man_node *p;
                    237:
1.45      kristaps  238:        p = mandoc_calloc(1, sizeof(struct man_node));
1.1       kristaps  239:        p->line = line;
                    240:        p->pos = pos;
                    241:        p->type = type;
1.16      kristaps  242:        p->tok = tok;
1.1       kristaps  243:        return(p);
                    244: }
                    245:
                    246:
                    247: int
1.53      kristaps  248: man_elem_alloc(struct man *m, int line, int pos, enum mant tok)
1.1       kristaps  249: {
                    250:        struct man_node *p;
                    251:
1.16      kristaps  252:        p = man_node_alloc(line, pos, MAN_ELEM, tok);
1.30      kristaps  253:        if ( ! man_node_append(m, p))
                    254:                return(0);
                    255:        m->next = MAN_NEXT_CHILD;
                    256:        return(1);
1.1       kristaps  257: }
                    258:
                    259:
                    260: int
1.53      kristaps  261: man_head_alloc(struct man *m, int line, int pos, enum mant tok)
1.29      kristaps  262: {
                    263:        struct man_node *p;
                    264:
                    265:        p = man_node_alloc(line, pos, MAN_HEAD, tok);
                    266:        if ( ! man_node_append(m, p))
                    267:                return(0);
                    268:        m->next = MAN_NEXT_CHILD;
                    269:        return(1);
                    270: }
                    271:
                    272:
                    273: int
1.53      kristaps  274: man_body_alloc(struct man *m, int line, int pos, enum mant tok)
1.29      kristaps  275: {
                    276:        struct man_node *p;
                    277:
                    278:        p = man_node_alloc(line, pos, MAN_BODY, tok);
                    279:        if ( ! man_node_append(m, p))
                    280:                return(0);
                    281:        m->next = MAN_NEXT_CHILD;
                    282:        return(1);
                    283: }
                    284:
                    285:
                    286: int
1.53      kristaps  287: man_block_alloc(struct man *m, int line, int pos, enum mant tok)
1.29      kristaps  288: {
                    289:        struct man_node *p;
                    290:
                    291:        p = man_node_alloc(line, pos, MAN_BLOCK, tok);
                    292:        if ( ! man_node_append(m, p))
                    293:                return(0);
                    294:        m->next = MAN_NEXT_CHILD;
                    295:        return(1);
                    296: }
                    297:
                    298:
1.61      kristaps  299: int
                    300: man_word_alloc(struct man *m, int line, int pos, const char *word)
1.1       kristaps  301: {
1.31      kristaps  302:        struct man_node *n;
1.61      kristaps  303:        size_t           sv, len;
                    304:
                    305:        len = strlen(word);
1.1       kristaps  306:
1.53      kristaps  307:        n = man_node_alloc(line, pos, MAN_TEXT, MAN_MAX);
1.45      kristaps  308:        n->string = mandoc_malloc(len + 1);
1.61      kristaps  309:        sv = strlcpy(n->string, word, len + 1);
1.31      kristaps  310:
                    311:        /* Prohibit truncation. */
                    312:        assert(sv < len + 1);
                    313:
                    314:        if ( ! man_node_append(m, n))
1.30      kristaps  315:                return(0);
1.61      kristaps  316:
1.30      kristaps  317:        m->next = MAN_NEXT_SIBLING;
                    318:        return(1);
1.1       kristaps  319: }
                    320:
                    321:
1.54      kristaps  322: /*
                    323:  * Free all of the resources held by a node.  This does NOT unlink a
                    324:  * node from its context; for that, see man_node_unlink().
                    325:  */
                    326: static void
1.1       kristaps  327: man_node_free(struct man_node *p)
                    328: {
                    329:
                    330:        if (p->string)
                    331:                free(p->string);
                    332:        free(p);
                    333: }
                    334:
                    335:
                    336: void
1.54      kristaps  337: man_node_delete(struct man *m, struct man_node *p)
1.1       kristaps  338: {
                    339:
1.54      kristaps  340:        while (p->child)
                    341:                man_node_delete(m, p->child);
                    342:
                    343:        man_node_unlink(m, p);
1.1       kristaps  344:        man_node_free(p);
                    345: }
                    346:
                    347:
                    348: static int
1.72      kristaps  349: man_ptext(struct man *m, int line, char *buf, int offs)
1.1       kristaps  350: {
1.61      kristaps  351:        int              i;
1.60      kristaps  352:
                    353:        /* Ignore bogus comments. */
                    354:
1.72      kristaps  355:        if ('\\' == buf[offs] &&
                    356:                        '.' == buf[offs + 1] &&
                    357:                        '"' == buf[offs + 2])
1.74      kristaps  358:                return(man_pmsg(m, line, offs, MANDOCERR_BADCOMMENT));
1.31      kristaps  359:
1.35      kristaps  360:        /* Literal free-form text whitespace is preserved. */
                    361:
                    362:        if (MAN_LITERAL & m->flags) {
1.72      kristaps  363:                if ( ! man_word_alloc(m, line, offs, buf + offs))
1.35      kristaps  364:                        return(0);
                    365:                goto descope;
                    366:        }
                    367:
1.61      kristaps  368:        /* Pump blank lines directly into the backend. */
1.31      kristaps  369:
1.72      kristaps  370:        for (i = offs; ' ' == buf[i]; i++)
1.31      kristaps  371:                /* Skip leading whitespace. */ ;
1.48      kristaps  372:
1.49      kristaps  373:        if ('\0' == buf[i]) {
1.61      kristaps  374:                /* Allocate a blank entry. */
1.72      kristaps  375:                if ( ! man_word_alloc(m, line, offs, ""))
1.31      kristaps  376:                        return(0);
                    377:                goto descope;
                    378:        }
                    379:
1.63      kristaps  380:        /*
                    381:         * Warn if the last un-escaped character is whitespace. Then
                    382:         * strip away the remaining spaces (tabs stay!).
                    383:         */
1.29      kristaps  384:
1.61      kristaps  385:        i = (int)strlen(buf);
                    386:        assert(i);
1.49      kristaps  387:
1.63      kristaps  388:        if (' ' == buf[i - 1] || '\t' == buf[i - 1]) {
1.64      kristaps  389:                if (i > 1 && '\\' != buf[i - 2])
1.74      kristaps  390:                        if ( ! man_pmsg(m, line, i - 1, MANDOCERR_EOLNSPACE))
1.49      kristaps  391:                                return(0);
1.63      kristaps  392:
                    393:                for (--i; i && ' ' == buf[i]; i--)
                    394:                        /* Spin back to non-space. */ ;
                    395:
                    396:                /* Jump ahead of escaped whitespace. */
                    397:                i += '\\' == buf[i] ? 2 : 1;
                    398:
                    399:                buf[i] = '\0';
                    400:        }
1.49      kristaps  401:
1.72      kristaps  402:        if ( ! man_word_alloc(m, line, offs, buf + offs))
1.1       kristaps  403:                return(0);
1.65      kristaps  404:
                    405:        /*
                    406:         * End-of-sentence check.  If the last character is an unescaped
                    407:         * EOS character, then flag the node as being the end of a
                    408:         * sentence.  The front-end will know how to interpret this.
                    409:         */
1.67      kristaps  410:
1.65      kristaps  411:        assert(i);
1.66      kristaps  412:        if (mandoc_eos(buf, (size_t)i))
1.65      kristaps  413:                m->last->flags |= MAN_EOS;
1.31      kristaps  414:
                    415: descope:
1.11      kristaps  416:        /*
1.29      kristaps  417:         * Co-ordinate what happens with having a next-line scope open:
                    418:         * first close out the element scope (if applicable), then close
                    419:         * out the block scope (also if applicable).
1.11      kristaps  420:         */
                    421:
1.29      kristaps  422:        if (MAN_ELINE & m->flags) {
                    423:                m->flags &= ~MAN_ELINE;
1.74      kristaps  424:                if ( ! man_unscope(m, m->last->parent, MANDOCERR_MAX))
1.29      kristaps  425:                        return(0);
                    426:        }
                    427:
                    428:        if ( ! (MAN_BLINE & m->flags))
1.11      kristaps  429:                return(1);
1.29      kristaps  430:        m->flags &= ~MAN_BLINE;
1.11      kristaps  431:
1.74      kristaps  432:        if ( ! man_unscope(m, m->last->parent, MANDOCERR_MAX))
1.11      kristaps  433:                return(0);
1.72      kristaps  434:        return(man_body_alloc(m, line, offs, m->last->tok));
1.1       kristaps  435: }
                    436:
                    437:
1.43      kristaps  438: static int
1.72      kristaps  439: macrowarn(struct man *m, int ln, const char *buf, int offs)
1.43      kristaps  440: {
1.74      kristaps  441:        int              rc;
                    442:
                    443:        rc = man_vmsg(m, MANDOCERR_MACRO, ln, offs,
                    444:                        "unknown macro: %s%s",
                    445:                        buf, strlen(buf) > 3 ? "..." : "");
                    446:
                    447:        return(MAN_IGN_MACRO & m->pflags ? rc : 0);
1.43      kristaps  448: }
                    449:
                    450:
1.1       kristaps  451: int
1.72      kristaps  452: man_pmacro(struct man *m, int ln, char *buf, int offs)
1.1       kristaps  453: {
1.58      kristaps  454:        int              i, j, ppos;
1.53      kristaps  455:        enum mant        tok;
1.34      kristaps  456:        char             mac[5];
                    457:        struct man_node *n;
1.1       kristaps  458:
                    459:        /* Comments and empties are quickly ignored. */
                    460:
1.72      kristaps  461:        offs++;
                    462:
                    463:        if ('\0' == buf[offs])
1.46      kristaps  464:                return(1);
1.1       kristaps  465:
1.72      kristaps  466:        i = offs;
1.9       kristaps  467:
1.56      kristaps  468:        /*
                    469:         * Skip whitespace between the control character and initial
                    470:         * text.  "Whitespace" is both spaces and tabs.
                    471:         */
1.62      kristaps  472:
1.57      kristaps  473:        if (' ' == buf[i] || '\t' == buf[i]) {
1.9       kristaps  474:                i++;
1.56      kristaps  475:                while (buf[i] && (' ' == buf[i] || '\t' == buf[i]))
1.1       kristaps  476:                        i++;
1.48      kristaps  477:                if ('\0' == buf[i])
1.11      kristaps  478:                        goto out;
1.1       kristaps  479:        }
                    480:
1.10      kristaps  481:        ppos = i;
                    482:
1.1       kristaps  483:        /* Copy the first word into a nil-terminated buffer. */
                    484:
1.10      kristaps  485:        for (j = 0; j < 4; j++, i++) {
1.48      kristaps  486:                if ('\0' == (mac[j] = buf[i]))
1.1       kristaps  487:                        break;
1.10      kristaps  488:                else if (' ' == buf[i])
1.1       kristaps  489:                        break;
1.38      kristaps  490:
                    491:                /* Check for invalid characters. */
                    492:
                    493:                if (isgraph((u_char)buf[i]))
                    494:                        continue;
1.74      kristaps  495:                if ( ! man_pmsg(m, ln, i, MANDOCERR_BADCHAR))
                    496:                        return(0);
                    497:                i--;
1.1       kristaps  498:        }
                    499:
1.46      kristaps  500:        mac[j] = '\0';
1.1       kristaps  501:
1.9       kristaps  502:        if (j == 4 || j < 1) {
1.74      kristaps  503:                if ( ! macrowarn(m, ln, mac, ppos))
1.7       kristaps  504:                        goto err;
1.12      kristaps  505:                return(1);
1.7       kristaps  506:        }
1.1       kristaps  507:
1.53      kristaps  508:        if (MAN_MAX == (tok = man_hash_find(mac))) {
1.72      kristaps  509:                if ( ! macrowarn(m, ln, mac, ppos))
1.7       kristaps  510:                        goto err;
1.12      kristaps  511:                return(1);
1.1       kristaps  512:        }
                    513:
                    514:        /* The macro is sane.  Jump to the next word. */
                    515:
                    516:        while (buf[i] && ' ' == buf[i])
                    517:                i++;
                    518:
1.62      kristaps  519:        /*
                    520:         * Trailing whitespace.  Note that tabs are allowed to be passed
                    521:         * into the parser as "text", so we only warn about spaces here.
                    522:         */
1.48      kristaps  523:
                    524:        if ('\0' == buf[i] && ' ' == buf[i - 1])
1.74      kristaps  525:                if ( ! man_pmsg(m, ln, i - 1, MANDOCERR_EOLNSPACE))
1.48      kristaps  526:                        goto err;
                    527:
1.50      kristaps  528:        /*
1.51      kristaps  529:         * Remove prior ELINE macro, as it's being clobbering by a new
                    530:         * macro.  Note that NSCOPED macros do not close out ELINE
                    531:         * macros---they don't print text---so we let those slip by.
1.50      kristaps  532:         */
1.34      kristaps  533:
1.53      kristaps  534:        if ( ! (MAN_NSCOPED & man_macros[tok].flags) &&
1.51      kristaps  535:                        m->flags & MAN_ELINE) {
                    536:                assert(MAN_TEXT != m->last->type);
                    537:
                    538:                /*
                    539:                 * This occurs in the following construction:
                    540:                 *   .B
                    541:                 *   .br
                    542:                 *   .B
                    543:                 *   .br
                    544:                 *   I hate man macros.
                    545:                 * Flat-out disallow this madness.
                    546:                 */
1.74      kristaps  547:                if (MAN_NSCOPED & man_macros[m->last->tok].flags) {
                    548:                        man_pmsg(m, ln, ppos, MANDOCERR_SYNTLINESCOPE);
                    549:                        return(0);
                    550:                }
1.51      kristaps  551:
1.34      kristaps  552:                n = m->last;
1.51      kristaps  553:
                    554:                assert(n);
1.34      kristaps  555:                assert(NULL == n->child);
1.37      kristaps  556:                assert(0 == n->nchild);
1.51      kristaps  557:
1.74      kristaps  558:                if ( ! man_nmsg(m, n, MANDOCERR_LINESCOPE))
1.34      kristaps  559:                        return(0);
                    560:
1.54      kristaps  561:                man_node_delete(m, n);
1.34      kristaps  562:                m->flags &= ~MAN_ELINE;
                    563:        }
                    564:
1.59      kristaps  565:        /*
                    566:         * Save the fact that we're in the next-line for a block.  In
                    567:         * this way, embedded roff instructions can "remember" state
                    568:         * when they exit.
                    569:         */
                    570:
                    571:        if (MAN_BLINE & m->flags)
                    572:                m->flags |= MAN_BPLINE;
                    573:
                    574:        /* Call to handler... */
1.1       kristaps  575:
1.53      kristaps  576:        assert(man_macros[tok].fp);
                    577:        if ( ! (*man_macros[tok].fp)(m, tok, ln, ppos, &i, buf))
1.1       kristaps  578:                goto err;
                    579:
1.11      kristaps  580: out:
1.50      kristaps  581:        /*
                    582:         * We weren't in a block-line scope when entering the
                    583:         * above-parsed macro, so return.
                    584:         */
                    585:
1.58      kristaps  586:        if ( ! (MAN_BPLINE & m->flags)) {
1.50      kristaps  587:                m->flags &= ~MAN_ILINE;
1.29      kristaps  588:                return(1);
1.50      kristaps  589:        }
1.58      kristaps  590:        m->flags &= ~MAN_BPLINE;
1.50      kristaps  591:
                    592:        /*
                    593:         * If we're in a block scope, then allow this macro to slip by
                    594:         * without closing scope around it.
                    595:         */
                    596:
                    597:        if (MAN_ILINE & m->flags) {
                    598:                m->flags &= ~MAN_ILINE;
                    599:                return(1);
                    600:        }
1.29      kristaps  601:
                    602:        /*
                    603:         * If we've opened a new next-line element scope, then return
                    604:         * now, as the next line will close out the block scope.
                    605:         */
                    606:
                    607:        if (MAN_ELINE & m->flags)
                    608:                return(1);
                    609:
                    610:        /* Close out the block scope opened in the prior line.  */
1.11      kristaps  611:
1.29      kristaps  612:        assert(MAN_BLINE & m->flags);
                    613:        m->flags &= ~MAN_BLINE;
1.11      kristaps  614:
1.74      kristaps  615:        if ( ! man_unscope(m, m->last->parent, MANDOCERR_MAX))
1.29      kristaps  616:                return(0);
1.72      kristaps  617:        return(man_body_alloc(m, ln, offs, m->last->tok));
1.1       kristaps  618:
                    619: err:   /* Error out. */
                    620:
1.2       kristaps  621:        m->flags |= MAN_HALT;
1.1       kristaps  622:        return(0);
                    623: }
1.3       kristaps  624:
1.4       kristaps  625:
                    626: int
1.74      kristaps  627: man_vmsg(struct man *man, enum mandocerr t,
                    628:                int ln, int pos, const char *fmt, ...)
1.4       kristaps  629: {
                    630:        char             buf[256];
                    631:        va_list          ap;
                    632:
                    633:        va_start(ap, fmt);
1.74      kristaps  634:        vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1.4       kristaps  635:        va_end(ap);
1.74      kristaps  636:        return((*man->msg)(t, man->data, ln, pos, buf));
1.51      kristaps  637: }
                    638:
                    639:
1.54      kristaps  640: /*
                    641:  * Unlink a node from its context.  If "m" is provided, the last parse
                    642:  * point will also be adjusted accordingly.
                    643:  */
                    644: static void
1.51      kristaps  645: man_node_unlink(struct man *m, struct man_node *n)
                    646: {
                    647:
1.54      kristaps  648:        /* Adjust siblings. */
                    649:
                    650:        if (n->prev)
1.51      kristaps  651:                n->prev->next = n->next;
1.54      kristaps  652:        if (n->next)
                    653:                n->next->prev = n->prev;
                    654:
                    655:        /* Adjust parent. */
                    656:
                    657:        if (n->parent) {
                    658:                n->parent->nchild--;
                    659:                if (n->parent->child == n)
                    660:                        n->parent->child = n->prev ? n->prev : n->next;
                    661:        }
                    662:
                    663:        /* Adjust parse point, if applicable. */
                    664:
                    665:        if (m && m->last == n) {
                    666:                /*XXX: this can occur when bailing from validation. */
                    667:                /*assert(NULL == n->next);*/
                    668:                if (n->prev) {
1.51      kristaps  669:                        m->last = n->prev;
                    670:                        m->next = MAN_NEXT_SIBLING;
1.54      kristaps  671:                } else {
1.51      kristaps  672:                        m->last = n->parent;
                    673:                        m->next = MAN_NEXT_CHILD;
                    674:                }
                    675:        }
                    676:
1.54      kristaps  677:        if (m && m->first == n)
                    678:                m->first = NULL;
1.23      kristaps  679: }

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