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Annotation of mandoc/man.c, Revision 1.156

1.156   ! schwarze    1: /*     $Id: man.c,v 1.155 2015/04/18 17:01:58 schwarze Exp $ */
1.1       kristaps    2: /*
1.102     schwarze    3:  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.149     schwarze    4:  * Copyright (c) 2013, 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
1.124     schwarze    5:  * Copyright (c) 2011 Joerg Sonnenberger <joerg@netbsd.org>
1.1       kristaps    6:  *
                      7:  * Permission to use, copy, modify, and distribute this software for any
1.18      kristaps    8:  * purpose with or without fee is hereby granted, provided that the above
                      9:  * copyright notice and this permission notice appear in all copies.
1.1       kristaps   10:  *
1.150     schwarze   11:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.18      kristaps   12:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.150     schwarze   13:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.18      kristaps   14:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     15:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     16:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     17:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1       kristaps   18:  */
1.47      kristaps   19: #include "config.h"
                     20:
1.41      kristaps   21: #include <sys/types.h>
                     22:
1.1       kristaps   23: #include <assert.h>
1.126     schwarze   24: #include <ctype.h>
1.1       kristaps   25: #include <stdarg.h>
                     26: #include <stdlib.h>
                     27: #include <stdio.h>
                     28: #include <string.h>
                     29:
1.150     schwarze   30: #include "mandoc_aux.h"
                     31: #include "mandoc.h"
                     32: #include "roff.h"
1.105     kristaps   33: #include "man.h"
1.150     schwarze   34: #include "libmandoc.h"
1.1       kristaps   35: #include "libman.h"
                     36:
1.129     schwarze   37: const  char *const __man_macronames[MAN_MAX] = {
1.21      kristaps   38:        "br",           "TH",           "SH",           "SS",
1.129     schwarze   39:        "TP",           "LP",           "PP",           "P",
1.1       kristaps   40:        "IP",           "HP",           "SM",           "SB",
                     41:        "BI",           "IB",           "BR",           "RB",
1.11      kristaps   42:        "R",            "B",            "I",            "IR",
1.148     schwarze   43:        "RI",           "sp",           "nf",
1.92      kristaps   44:        "fi",           "RE",           "RS",           "DT",
                     45:        "UC",           "PD",           "AT",           "in",
1.120     schwarze   46:        "ft",           "OP",           "EX",           "EE",
1.128     schwarze   47:        "UR",           "UE",           "ll"
1.1       kristaps   48:        };
                     49:
                     50: const  char * const *man_macronames = __man_macronames;
                     51:
1.153     schwarze   52: static void             man_breakscope(struct roff_man *, int);
                     53: static void             man_descope(struct roff_man *, int, int);
                     54: static struct roff_node *man_node_alloc(struct roff_man *, int, int,
1.151     schwarze   55:                                enum roff_type, int);
1.153     schwarze   56: static void             man_node_append(struct roff_man *,
                     57:                                struct roff_node *);
1.151     schwarze   58: static void             man_node_free(struct roff_node *);
1.153     schwarze   59: static void             man_node_unlink(struct roff_man *,
                     60:                                struct roff_node *);
                     61: static int              man_ptext(struct roff_man *, int, char *, int);
                     62: static int              man_pmacro(struct roff_man *, int, char *, int);
1.1       kristaps   63:
                     64:
1.151     schwarze   65: const struct roff_node *
1.153     schwarze   66: man_node(const struct roff_man *man)
1.1       kristaps   67: {
                     68:
1.119     schwarze   69:        return(man->first);
1.1       kristaps   70: }
                     71:
1.152     schwarze   72: const struct roff_meta *
1.153     schwarze   73: man_meta(const struct roff_man *man)
1.1       kristaps   74: {
                     75:
1.119     schwarze   76:        return(&man->meta);
1.1       kristaps   77: }
                     78:
1.45      kristaps   79: void
1.153     schwarze   80: man_endparse(struct roff_man *man)
1.1       kristaps   81: {
                     82:
1.144     schwarze   83:        man_macroend(man);
1.1       kristaps   84: }
                     85:
                     86: int
1.153     schwarze   87: man_parseln(struct roff_man *man, int ln, char *buf, int offs)
1.1       kristaps   88: {
                     89:
1.150     schwarze   90:        if (man->last->type != ROFFT_EQN || ln > man->last->line)
1.141     schwarze   91:                man->flags |= MAN_NEWLINE;
1.97      kristaps   92:
1.119     schwarze   93:        return (roff_getcontrol(man->roff, buf, &offs) ?
1.129     schwarze   94:            man_pmacro(man, ln, buf, offs) :
                     95:            man_ptext(man, ln, buf, offs));
1.1       kristaps   96: }
1.2       kristaps   97:
1.144     schwarze   98: static void
1.153     schwarze   99: man_node_append(struct roff_man *man, struct roff_node *p)
1.1       kristaps  100: {
                    101:
                    102:        assert(man->last);
                    103:        assert(man->first);
1.150     schwarze  104:        assert(p->type != ROFFT_ROOT);
1.1       kristaps  105:
                    106:        switch (man->next) {
1.153     schwarze  107:        case ROFF_NEXT_SIBLING:
1.1       kristaps  108:                man->last->next = p;
                    109:                p->prev = man->last;
                    110:                p->parent = man->last->parent;
                    111:                break;
1.153     schwarze  112:        case ROFF_NEXT_CHILD:
1.1       kristaps  113:                man->last->child = p;
                    114:                p->parent = man->last;
                    115:                break;
                    116:        default:
                    117:                abort();
                    118:                /* NOTREACHED */
                    119:        }
1.129     schwarze  120:
1.54      kristaps  121:        assert(p->parent);
1.22      kristaps  122:        p->parent->nchild++;
1.1       kristaps  123:
1.29      kristaps  124:        switch (p->type) {
1.150     schwarze  125:        case ROFFT_BLOCK:
1.137     schwarze  126:                if (p->tok == MAN_SH || p->tok == MAN_SS)
                    127:                        man->flags &= ~MAN_LITERAL;
                    128:                break;
1.150     schwarze  129:        case ROFFT_HEAD:
                    130:                assert(p->parent->type == ROFFT_BLOCK);
1.29      kristaps  131:                p->parent->head = p;
                    132:                break;
1.150     schwarze  133:        case ROFFT_BODY:
                    134:                assert(p->parent->type == ROFFT_BLOCK);
1.29      kristaps  135:                p->parent->body = p;
                    136:                break;
                    137:        default:
                    138:                break;
                    139:        }
                    140:
1.2       kristaps  141:        man->last = p;
                    142:
1.1       kristaps  143:        switch (p->type) {
1.150     schwarze  144:        case ROFFT_TBL:
1.94      kristaps  145:                /* FALLTHROUGH */
1.150     schwarze  146:        case ROFFT_TEXT:
1.144     schwarze  147:                man_valid_post(man);
1.1       kristaps  148:                break;
                    149:        default:
                    150:                break;
                    151:        }
                    152: }
                    153:
1.151     schwarze  154: static struct roff_node *
1.153     schwarze  155: man_node_alloc(struct roff_man *man, int line, int pos,
1.151     schwarze  156:                enum roff_type type, int tok)
1.1       kristaps  157: {
1.151     schwarze  158:        struct roff_node *p;
1.1       kristaps  159:
1.151     schwarze  160:        p = mandoc_calloc(1, sizeof(*p));
1.1       kristaps  161:        p->line = line;
                    162:        p->pos = pos;
                    163:        p->type = type;
1.16      kristaps  164:        p->tok = tok;
1.97      kristaps  165:
1.144     schwarze  166:        if (man->flags & MAN_NEWLINE)
1.97      kristaps  167:                p->flags |= MAN_LINE;
1.119     schwarze  168:        man->flags &= ~MAN_NEWLINE;
1.1       kristaps  169:        return(p);
                    170: }
                    171:
1.144     schwarze  172: void
1.153     schwarze  173: man_elem_alloc(struct roff_man *man, int line, int pos, int tok)
1.1       kristaps  174: {
1.151     schwarze  175:        struct roff_node *p;
1.1       kristaps  176:
1.150     schwarze  177:        p = man_node_alloc(man, line, pos, ROFFT_ELEM, tok);
1.144     schwarze  178:        man_node_append(man, p);
1.153     schwarze  179:        man->next = ROFF_NEXT_CHILD;
1.106     kristaps  180: }
                    181:
1.144     schwarze  182: void
1.153     schwarze  183: man_head_alloc(struct roff_man *man, int line, int pos, int tok)
1.29      kristaps  184: {
1.151     schwarze  185:        struct roff_node *p;
1.29      kristaps  186:
1.150     schwarze  187:        p = man_node_alloc(man, line, pos, ROFFT_HEAD, tok);
1.144     schwarze  188:        man_node_append(man, p);
1.153     schwarze  189:        man->next = ROFF_NEXT_CHILD;
1.29      kristaps  190: }
                    191:
1.144     schwarze  192: void
1.153     schwarze  193: man_body_alloc(struct roff_man *man, int line, int pos, int tok)
1.29      kristaps  194: {
1.151     schwarze  195:        struct roff_node *p;
1.29      kristaps  196:
1.150     schwarze  197:        p = man_node_alloc(man, line, pos, ROFFT_BODY, tok);
1.144     schwarze  198:        man_node_append(man, p);
1.153     schwarze  199:        man->next = ROFF_NEXT_CHILD;
1.29      kristaps  200: }
                    201:
1.144     schwarze  202: void
1.153     schwarze  203: man_block_alloc(struct roff_man *man, int line, int pos, int tok)
1.29      kristaps  204: {
1.151     schwarze  205:        struct roff_node *p;
1.29      kristaps  206:
1.150     schwarze  207:        p = man_node_alloc(man, line, pos, ROFFT_BLOCK, tok);
1.144     schwarze  208:        man_node_append(man, p);
1.153     schwarze  209:        man->next = ROFF_NEXT_CHILD;
1.29      kristaps  210: }
                    211:
1.144     schwarze  212: void
1.153     schwarze  213: man_word_alloc(struct roff_man *man, int line, int pos, const char *word)
1.1       kristaps  214: {
1.151     schwarze  215:        struct roff_node *n;
1.1       kristaps  216:
1.150     schwarze  217:        n = man_node_alloc(man, line, pos, ROFFT_TEXT, MAN_MAX);
1.119     schwarze  218:        n->string = roff_strdup(man->roff, word);
1.144     schwarze  219:        man_node_append(man, n);
1.153     schwarze  220:        man->next = ROFF_NEXT_SIBLING;
1.142     schwarze  221: }
                    222:
                    223: void
1.153     schwarze  224: man_word_append(struct roff_man *man, const char *word)
1.142     schwarze  225: {
1.151     schwarze  226:        struct roff_node *n;
1.142     schwarze  227:        char            *addstr, *newstr;
                    228:
                    229:        n = man->last;
                    230:        addstr = roff_strdup(man->roff, word);
                    231:        mandoc_asprintf(&newstr, "%s %s", n->string, addstr);
                    232:        free(addstr);
                    233:        free(n->string);
                    234:        n->string = newstr;
1.153     schwarze  235:        man->next = ROFF_NEXT_SIBLING;
1.1       kristaps  236: }
                    237:
1.54      kristaps  238: /*
                    239:  * Free all of the resources held by a node.  This does NOT unlink a
                    240:  * node from its context; for that, see man_node_unlink().
                    241:  */
                    242: static void
1.151     schwarze  243: man_node_free(struct roff_node *p)
1.1       kristaps  244: {
                    245:
1.144     schwarze  246:        free(p->string);
1.1       kristaps  247:        free(p);
                    248: }
                    249:
                    250: void
1.153     schwarze  251: man_node_delete(struct roff_man *man, struct roff_node *p)
1.1       kristaps  252: {
                    253:
1.54      kristaps  254:        while (p->child)
1.119     schwarze  255:                man_node_delete(man, p->child);
1.54      kristaps  256:
1.119     schwarze  257:        man_node_unlink(man, p);
1.1       kristaps  258:        man_node_free(p);
                    259: }
                    260:
1.145     schwarze  261: void
1.153     schwarze  262: man_addeqn(struct roff_man *man, const struct eqn *ep)
1.101     kristaps  263: {
1.151     schwarze  264:        struct roff_node *n;
1.101     kristaps  265:
1.150     schwarze  266:        n = man_node_alloc(man, ep->ln, ep->pos, ROFFT_EQN, MAN_MAX);
1.101     kristaps  267:        n->eqn = ep;
1.140     schwarze  268:        if (ep->ln > man->last->line)
                    269:                n->flags |= MAN_LINE;
1.144     schwarze  270:        man_node_append(man, n);
1.153     schwarze  271:        man->next = ROFF_NEXT_SIBLING;
1.144     schwarze  272:        man_descope(man, ep->ln, ep->pos);
1.101     kristaps  273: }
1.1       kristaps  274:
1.145     schwarze  275: void
1.153     schwarze  276: man_addspan(struct roff_man *man, const struct tbl_span *sp)
1.94      kristaps  277: {
1.151     schwarze  278:        struct roff_node *n;
1.94      kristaps  279:
1.149     schwarze  280:        man_breakscope(man, MAN_MAX);
1.150     schwarze  281:        n = man_node_alloc(man, sp->line, 0, ROFFT_TBL, MAN_MAX);
1.100     kristaps  282:        n->span = sp;
1.144     schwarze  283:        man_node_append(man, n);
1.153     schwarze  284:        man->next = ROFF_NEXT_SIBLING;
1.144     schwarze  285:        man_descope(man, sp->line, 0);
1.94      kristaps  286: }
                    287:
1.144     schwarze  288: static void
1.153     schwarze  289: man_descope(struct roff_man *man, int line, int offs)
1.94      kristaps  290: {
                    291:        /*
                    292:         * Co-ordinate what happens with having a next-line scope open:
                    293:         * first close out the element scope (if applicable), then close
                    294:         * out the block scope (also if applicable).
                    295:         */
                    296:
1.144     schwarze  297:        if (man->flags & MAN_ELINE) {
1.119     schwarze  298:                man->flags &= ~MAN_ELINE;
1.144     schwarze  299:                man_unscope(man, man->last->parent);
1.94      kristaps  300:        }
1.144     schwarze  301:        if ( ! (man->flags & MAN_BLINE))
                    302:                return;
1.119     schwarze  303:        man->flags &= ~MAN_BLINE;
1.144     schwarze  304:        man_unscope(man, man->last->parent);
                    305:        man_body_alloc(man, line, offs, man->last->tok);
1.94      kristaps  306: }
                    307:
1.1       kristaps  308: static int
1.153     schwarze  309: man_ptext(struct roff_man *man, int line, char *buf, int offs)
1.1       kristaps  310: {
1.61      kristaps  311:        int              i;
1.60      kristaps  312:
1.35      kristaps  313:        /* Literal free-form text whitespace is preserved. */
                    314:
1.144     schwarze  315:        if (man->flags & MAN_LITERAL) {
                    316:                man_word_alloc(man, line, offs, buf + offs);
                    317:                man_descope(man, line, offs);
                    318:                return(1);
1.35      kristaps  319:        }
                    320:
1.144     schwarze  321:        for (i = offs; buf[i] == ' '; i++)
1.31      kristaps  322:                /* Skip leading whitespace. */ ;
1.48      kristaps  323:
1.121     schwarze  324:        /*
                    325:         * Blank lines are ignored right after headings
                    326:         * but add a single vertical space elsewhere.
                    327:         */
                    328:
1.144     schwarze  329:        if (buf[i] == '\0') {
1.61      kristaps  330:                /* Allocate a blank entry. */
1.144     schwarze  331:                if (man->last->tok != MAN_SH &&
                    332:                    man->last->tok != MAN_SS) {
                    333:                        man_elem_alloc(man, line, offs, MAN_sp);
1.153     schwarze  334:                        man->next = ROFF_NEXT_SIBLING;
1.121     schwarze  335:                }
1.118     schwarze  336:                return(1);
1.31      kristaps  337:        }
                    338:
1.129     schwarze  339:        /*
1.63      kristaps  340:         * Warn if the last un-escaped character is whitespace. Then
1.129     schwarze  341:         * strip away the remaining spaces (tabs stay!).
1.63      kristaps  342:         */
1.29      kristaps  343:
1.61      kristaps  344:        i = (int)strlen(buf);
                    345:        assert(i);
1.49      kristaps  346:
1.63      kristaps  347:        if (' ' == buf[i - 1] || '\t' == buf[i - 1]) {
1.64      kristaps  348:                if (i > 1 && '\\' != buf[i - 2])
1.131     schwarze  349:                        mandoc_msg(MANDOCERR_SPACE_EOL, man->parse,
                    350:                            line, i - 1, NULL);
1.63      kristaps  351:
                    352:                for (--i; i && ' ' == buf[i]; i--)
                    353:                        /* Spin back to non-space. */ ;
                    354:
                    355:                /* Jump ahead of escaped whitespace. */
                    356:                i += '\\' == buf[i] ? 2 : 1;
                    357:
                    358:                buf[i] = '\0';
                    359:        }
1.144     schwarze  360:        man_word_alloc(man, line, offs, buf + offs);
1.65      kristaps  361:
                    362:        /*
                    363:         * End-of-sentence check.  If the last character is an unescaped
                    364:         * EOS character, then flag the node as being the end of a
                    365:         * sentence.  The front-end will know how to interpret this.
                    366:         */
1.67      kristaps  367:
1.65      kristaps  368:        assert(i);
1.122     schwarze  369:        if (mandoc_eos(buf, (size_t)i))
1.119     schwarze  370:                man->last->flags |= MAN_EOS;
1.31      kristaps  371:
1.144     schwarze  372:        man_descope(man, line, offs);
                    373:        return(1);
1.1       kristaps  374: }
                    375:
1.96      kristaps  376: static int
1.153     schwarze  377: man_pmacro(struct roff_man *man, int ln, char *buf, int offs)
1.1       kristaps  378: {
1.151     schwarze  379:        struct roff_node *n;
1.143     schwarze  380:        const char      *cp;
1.151     schwarze  381:        int              tok;
1.134     schwarze  382:        int              i, ppos;
                    383:        int              bline;
1.143     schwarze  384:        char             mac[5];
1.1       kristaps  385:
1.107     kristaps  386:        ppos = offs;
1.9       kristaps  387:
1.56      kristaps  388:        /*
1.107     kristaps  389:         * Copy the first word into a nil-terminated buffer.
1.143     schwarze  390:         * Stop when a space, tab, escape, or eoln is encountered.
1.56      kristaps  391:         */
1.62      kristaps  392:
1.107     kristaps  393:        i = 0;
1.143     schwarze  394:        while (i < 4 && strchr(" \t\\", buf[offs]) == NULL)
1.107     kristaps  395:                mac[i++] = buf[offs++];
1.10      kristaps  396:
1.107     kristaps  397:        mac[i] = '\0';
1.1       kristaps  398:
1.107     kristaps  399:        tok = (i > 0 && i < 4) ? man_hash_find(mac) : MAN_MAX;
1.1       kristaps  400:
1.143     schwarze  401:        if (tok == MAN_MAX) {
1.136     schwarze  402:                mandoc_msg(MANDOCERR_MACRO, man->parse,
                    403:                    ln, ppos, buf + ppos - 1);
1.12      kristaps  404:                return(1);
1.1       kristaps  405:        }
                    406:
1.143     schwarze  407:        /* Skip a leading escape sequence or tab. */
                    408:
                    409:        switch (buf[offs]) {
                    410:        case '\\':
                    411:                cp = buf + offs + 1;
                    412:                mandoc_escape(&cp, NULL, NULL);
                    413:                offs = cp - buf;
                    414:                break;
                    415:        case '\t':
                    416:                offs++;
                    417:                break;
                    418:        default:
                    419:                break;
                    420:        }
                    421:
                    422:        /* Jump to the next non-whitespace word. */
1.1       kristaps  423:
1.144     schwarze  424:        while (buf[offs] && buf[offs] == ' ')
1.107     kristaps  425:                offs++;
1.1       kristaps  426:
1.129     schwarze  427:        /*
1.62      kristaps  428:         * Trailing whitespace.  Note that tabs are allowed to be passed
                    429:         * into the parser as "text", so we only warn about spaces here.
                    430:         */
1.48      kristaps  431:
1.144     schwarze  432:        if (buf[offs] == '\0' && buf[offs - 1] == ' ')
1.131     schwarze  433:                mandoc_msg(MANDOCERR_SPACE_EOL, man->parse,
                    434:                    ln, offs - 1, NULL);
1.48      kristaps  435:
1.129     schwarze  436:        /*
1.149     schwarze  437:         * Some macros break next-line scopes; otherwise, remember
                    438:         * whether we are in next-line scope for a block head.
1.50      kristaps  439:         */
1.34      kristaps  440:
1.149     schwarze  441:        man_breakscope(man, tok);
1.134     schwarze  442:        bline = man->flags & MAN_BLINE;
1.59      kristaps  443:
                    444:        /* Call to handler... */
1.1       kristaps  445:
1.53      kristaps  446:        assert(man_macros[tok].fp);
1.144     schwarze  447:        (*man_macros[tok].fp)(man, tok, ln, ppos, &offs, buf);
1.123     schwarze  448:
                    449:        /* In quick mode (for mandocdb), abort after the NAME section. */
                    450:
1.144     schwarze  451:        if (man->quick && tok == MAN_SH) {
1.130     schwarze  452:                n = man->last;
1.150     schwarze  453:                if (n->type == ROFFT_BODY &&
1.130     schwarze  454:                    strcmp(n->prev->child->string, "NAME"))
                    455:                        return(2);
                    456:        }
1.1       kristaps  457:
1.129     schwarze  458:        /*
1.135     schwarze  459:         * If we are in a next-line scope for a block head,
                    460:         * close it out now and switch to the body,
                    461:         * unless the next-line scope is allowed to continue.
1.29      kristaps  462:         */
                    463:
1.135     schwarze  464:        if ( ! bline || man->flags & MAN_ELINE ||
                    465:            man_macros[tok].flags & MAN_NSCOPED)
1.29      kristaps  466:                return(1);
                    467:
1.144     schwarze  468:        assert(man->flags & MAN_BLINE);
1.119     schwarze  469:        man->flags &= ~MAN_BLINE;
1.11      kristaps  470:
1.144     schwarze  471:        man_unscope(man, man->last->parent);
                    472:        man_body_alloc(man, ln, ppos, man->last->tok);
                    473:        return(1);
1.149     schwarze  474: }
                    475:
                    476: void
1.153     schwarze  477: man_breakscope(struct roff_man *man, int tok)
1.149     schwarze  478: {
1.151     schwarze  479:        struct roff_node *n;
1.149     schwarze  480:
                    481:        /*
                    482:         * An element next line scope is open,
                    483:         * and the new macro is not allowed inside elements.
                    484:         * Delete the element that is being broken.
                    485:         */
                    486:
                    487:        if (man->flags & MAN_ELINE && (tok == MAN_MAX ||
                    488:            ! (man_macros[tok].flags & MAN_NSCOPED))) {
                    489:                n = man->last;
1.150     schwarze  490:                assert(n->type != ROFFT_TEXT);
1.149     schwarze  491:                if (man_macros[n->tok].flags & MAN_NSCOPED)
                    492:                        n = n->parent;
                    493:
                    494:                mandoc_vmsg(MANDOCERR_BLK_LINE, man->parse,
                    495:                    n->line, n->pos, "%s breaks %s",
                    496:                    tok == MAN_MAX ? "TS" : man_macronames[tok],
                    497:                    man_macronames[n->tok]);
                    498:
                    499:                man_node_delete(man, n);
                    500:                man->flags &= ~MAN_ELINE;
                    501:        }
                    502:
                    503:        /*
                    504:         * A block header next line scope is open,
                    505:         * and the new macro is not allowed inside block headers.
                    506:         * Delete the block that is being broken.
                    507:         */
                    508:
                    509:        if (man->flags & MAN_BLINE && (tok == MAN_MAX ||
                    510:            man_macros[tok].flags & MAN_BSCOPE)) {
                    511:                n = man->last;
1.150     schwarze  512:                if (n->type == ROFFT_TEXT)
1.149     schwarze  513:                        n = n->parent;
                    514:                if ( ! (man_macros[n->tok].flags & MAN_BSCOPE))
                    515:                        n = n->parent;
                    516:
1.150     schwarze  517:                assert(n->type == ROFFT_HEAD);
1.149     schwarze  518:                n = n->parent;
1.150     schwarze  519:                assert(n->type == ROFFT_BLOCK);
1.149     schwarze  520:                assert(man_macros[n->tok].flags & MAN_SCOPED);
                    521:
                    522:                mandoc_vmsg(MANDOCERR_BLK_LINE, man->parse,
                    523:                    n->line, n->pos, "%s breaks %s",
                    524:                    tok == MAN_MAX ? "TS" : man_macronames[tok],
                    525:                    man_macronames[n->tok]);
                    526:
                    527:                man_node_delete(man, n);
                    528:                man->flags &= ~MAN_BLINE;
                    529:        }
1.1       kristaps  530: }
1.51      kristaps  531:
1.54      kristaps  532: /*
1.119     schwarze  533:  * Unlink a node from its context.  If "man" is provided, the last parse
1.54      kristaps  534:  * point will also be adjusted accordingly.
                    535:  */
                    536: static void
1.153     schwarze  537: man_node_unlink(struct roff_man *man, struct roff_node *n)
1.51      kristaps  538: {
                    539:
1.54      kristaps  540:        /* Adjust siblings. */
                    541:
                    542:        if (n->prev)
1.51      kristaps  543:                n->prev->next = n->next;
1.54      kristaps  544:        if (n->next)
                    545:                n->next->prev = n->prev;
                    546:
                    547:        /* Adjust parent. */
                    548:
                    549:        if (n->parent) {
                    550:                n->parent->nchild--;
                    551:                if (n->parent->child == n)
                    552:                        n->parent->child = n->prev ? n->prev : n->next;
                    553:        }
                    554:
                    555:        /* Adjust parse point, if applicable. */
                    556:
1.119     schwarze  557:        if (man && man->last == n) {
1.54      kristaps  558:                /*XXX: this can occur when bailing from validation. */
                    559:                /*assert(NULL == n->next);*/
                    560:                if (n->prev) {
1.119     schwarze  561:                        man->last = n->prev;
1.153     schwarze  562:                        man->next = ROFF_NEXT_SIBLING;
1.54      kristaps  563:                } else {
1.119     schwarze  564:                        man->last = n->parent;
1.153     schwarze  565:                        man->next = ROFF_NEXT_CHILD;
1.51      kristaps  566:                }
                    567:        }
                    568:
1.119     schwarze  569:        if (man && man->first == n)
                    570:                man->first = NULL;
1.112     kristaps  571: }
                    572:
                    573: const struct mparse *
1.153     schwarze  574: man_mparse(const struct roff_man *man)
1.112     kristaps  575: {
                    576:
1.119     schwarze  577:        assert(man && man->parse);
                    578:        return(man->parse);
1.126     schwarze  579: }
                    580:
                    581: void
1.151     schwarze  582: man_deroff(char **dest, const struct roff_node *n)
1.126     schwarze  583: {
                    584:        char    *cp;
                    585:        size_t   sz;
                    586:
1.150     schwarze  587:        if (n->type != ROFFT_TEXT) {
1.126     schwarze  588:                for (n = n->child; n; n = n->next)
                    589:                        man_deroff(dest, n);
                    590:                return;
                    591:        }
                    592:
1.127     schwarze  593:        /* Skip leading whitespace and escape sequences. */
1.126     schwarze  594:
1.127     schwarze  595:        cp = n->string;
                    596:        while ('\0' != *cp) {
                    597:                if ('\\' == *cp) {
                    598:                        cp++;
                    599:                        mandoc_escape((const char **)&cp, NULL, NULL);
                    600:                } else if (isspace((unsigned char)*cp))
                    601:                        cp++;
                    602:                else
1.126     schwarze  603:                        break;
1.127     schwarze  604:        }
1.126     schwarze  605:
                    606:        /* Skip trailing whitespace. */
                    607:
                    608:        for (sz = strlen(cp); sz; sz--)
                    609:                if (0 == isspace((unsigned char)cp[sz-1]))
                    610:                        break;
                    611:
                    612:        /* Skip empty strings. */
                    613:
                    614:        if (0 == sz)
                    615:                return;
                    616:
                    617:        if (NULL == *dest) {
                    618:                *dest = mandoc_strndup(cp, sz);
                    619:                return;
                    620:        }
                    621:
                    622:        mandoc_asprintf(&cp, "%s %*s", *dest, (int)sz, cp);
                    623:        free(*dest);
                    624:        *dest = cp;
1.23      kristaps  625: }

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