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Annotation of mandoc/man_macro.c, Revision 1.83

1.83    ! schwarze    1: /*     $Id: man_macro.c,v 1.82 2014/04/20 16:46:04 schwarze Exp $ */
1.1       kristaps    2: /*
1.65      schwarze    3:  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.77      schwarze    4:  * Copyright (c) 2012, 2013 Ingo Schwarze <schwarze@openbsd.org>
1.79      schwarze    5:  * Copyright (c) 2013 Franco Fichtner <franco@lastsummer.de>
1.1       kristaps    6:  *
                      7:  * Permission to use, copy, modify, and distribute this software for any
1.14      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:  *
1.14      kristaps   11:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     12:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     13:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     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:  */
1.30      kristaps   19: #ifdef HAVE_CONFIG_H
                     20: #include "config.h"
                     21: #endif
                     22:
1.1       kristaps   23: #include <assert.h>
                     24: #include <ctype.h>
                     25: #include <stdlib.h>
                     26: #include <string.h>
                     27:
1.58      kristaps   28: #include "man.h"
1.46      kristaps   29: #include "mandoc.h"
1.57      kristaps   30: #include "libmandoc.h"
1.1       kristaps   31: #include "libman.h"
                     32:
1.34      kristaps   33: enum   rew {
                     34:        REW_REWIND,
                     35:        REW_NOHALT,
1.40      kristaps   36:        REW_HALT
1.34      kristaps   37: };
1.19      kristaps   38:
1.35      kristaps   39: static int              blk_close(MACRO_PROT_ARGS);
                     40: static int              blk_exp(MACRO_PROT_ARGS);
                     41: static int              blk_imp(MACRO_PROT_ARGS);
1.19      kristaps   42: static int              in_line_eoln(MACRO_PROT_ARGS);
1.82      schwarze   43: static int              man_args(struct man *, int,
1.60      kristaps   44:                                int *, char *, char **);
1.19      kristaps   45:
1.82      schwarze   46: static int              rew_scope(enum man_type,
1.33      kristaps   47:                                struct man *, enum mant);
1.82      schwarze   48: static enum rew         rew_dohalt(enum mant, enum man_type,
1.19      kristaps   49:                                const struct man_node *);
1.82      schwarze   50: static enum rew         rew_block(enum mant, enum man_type,
1.21      kristaps   51:                                const struct man_node *);
1.82      schwarze   52: static void             rew_warn(struct man *,
1.46      kristaps   53:                                struct man_node *, enum mandocerr);
1.19      kristaps   54:
                     55: const  struct man_macro __man_macros[MAN_MAX] = {
1.31      kristaps   56:        { in_line_eoln, MAN_NSCOPED }, /* br */
1.66      schwarze   57:        { in_line_eoln, MAN_BSCOPE }, /* TH */
                     58:        { blk_imp, MAN_BSCOPE | MAN_SCOPED }, /* SH */
                     59:        { blk_imp, MAN_BSCOPE | MAN_SCOPED }, /* SS */
                     60:        { blk_imp, MAN_BSCOPE | MAN_SCOPED | MAN_FSCOPED }, /* TP */
                     61:        { blk_imp, MAN_BSCOPE }, /* LP */
                     62:        { blk_imp, MAN_BSCOPE }, /* PP */
                     63:        { blk_imp, MAN_BSCOPE }, /* P */
                     64:        { blk_imp, MAN_BSCOPE }, /* IP */
                     65:        { blk_imp, MAN_BSCOPE }, /* HP */
1.19      kristaps   66:        { in_line_eoln, MAN_SCOPED }, /* SM */
                     67:        { in_line_eoln, MAN_SCOPED }, /* SB */
                     68:        { in_line_eoln, 0 }, /* BI */
                     69:        { in_line_eoln, 0 }, /* IB */
                     70:        { in_line_eoln, 0 }, /* BR */
                     71:        { in_line_eoln, 0 }, /* RB */
                     72:        { in_line_eoln, MAN_SCOPED }, /* R */
                     73:        { in_line_eoln, MAN_SCOPED }, /* B */
                     74:        { in_line_eoln, MAN_SCOPED }, /* I */
                     75:        { in_line_eoln, 0 }, /* IR */
                     76:        { in_line_eoln, 0 }, /* RI */
1.31      kristaps   77:        { in_line_eoln, MAN_NSCOPED }, /* na */
                     78:        { in_line_eoln, MAN_NSCOPED }, /* sp */
1.66      schwarze   79:        { in_line_eoln, MAN_BSCOPE }, /* nf */
                     80:        { in_line_eoln, MAN_BSCOPE }, /* fi */
1.21      kristaps   81:        { blk_close, 0 }, /* RE */
1.74      kristaps   82:        { blk_exp, MAN_BSCOPE | MAN_EXPLICIT }, /* RS */
1.23      kristaps   83:        { in_line_eoln, 0 }, /* DT */
1.28      kristaps   84:        { in_line_eoln, 0 }, /* UC */
1.29      kristaps   85:        { in_line_eoln, 0 }, /* PD */
1.45      joerg      86:        { in_line_eoln, 0 }, /* AT */
1.49      kristaps   87:        { in_line_eoln, 0 }, /* in */
1.53      kristaps   88:        { in_line_eoln, 0 }, /* ft */
1.71      kristaps   89:        { in_line_eoln, 0 }, /* OP */
1.72      schwarze   90:        { in_line_eoln, MAN_BSCOPE }, /* EX */
                     91:        { in_line_eoln, MAN_BSCOPE }, /* EE */
1.76      schwarze   92:        { blk_exp, MAN_BSCOPE | MAN_EXPLICIT }, /* UR */
                     93:        { blk_close, 0 }, /* UE */
1.81      schwarze   94:        { in_line_eoln, 0 }, /* ll */
1.19      kristaps   95: };
1.9       kristaps   96:
1.19      kristaps   97: const  struct man_macro * const man_macros = __man_macros;
1.1       kristaps   98:
                     99:
1.3       kristaps  100: int
1.83    ! schwarze  101: man_unscope(struct man *man, const struct man_node *to)
1.1       kristaps  102: {
1.55      kristaps  103:        struct man_node *n;
1.1       kristaps  104:
1.75      schwarze  105:        man->next = MAN_NEXT_SIBLING;
1.83    ! schwarze  106:        to = to->parent;
        !           107:        n = man->last;
        !           108:        while (n != to) {
        !           109:                if (NULL == to &&
        !           110:                    MAN_BLOCK == n->type &&
        !           111:                    0 == (MAN_VALID & n->flags) &&
        !           112:                    MAN_EXPLICIT & man_macros[n->tok].flags)
        !           113:                        mandoc_msg(MANDOCERR_SCOPEEXIT,
        !           114:                            man->parse, n->line, n->pos,
        !           115:                            man_macronames[n->tok]);
1.55      kristaps  116:                /*
1.83    ! schwarze  117:                 * We might delete the man->last node
        !           118:                 * in the post-validation phase.
        !           119:                 * Save a pointer to the parent such that
        !           120:                 * we know where to continue the iteration.
1.55      kristaps  121:                 */
1.83    ! schwarze  122:                man->last = n;
        !           123:                n = n->parent;
1.75      schwarze  124:                if ( ! man_valid_post(man))
1.19      kristaps  125:                        return(0);
                    126:        }
1.35      kristaps  127:        return(1);
1.19      kristaps  128: }
1.1       kristaps  129:
1.34      kristaps  130: static enum rew
1.33      kristaps  131: rew_block(enum mant ntok, enum man_type type, const struct man_node *n)
1.21      kristaps  132: {
                    133:
1.82      schwarze  134:        if (MAN_BLOCK == type && ntok == n->parent->tok &&
                    135:            MAN_BODY == n->parent->type)
1.21      kristaps  136:                return(REW_REWIND);
                    137:        return(ntok == n->tok ? REW_HALT : REW_NOHALT);
                    138: }
                    139:
1.19      kristaps  140: /*
                    141:  * There are three scope levels: scoped to the root (all), scoped to the
                    142:  * section (all less sections), and scoped to subsections (all less
                    143:  * sections and subsections).
                    144:  */
1.82      schwarze  145: static enum rew
1.33      kristaps  146: rew_dohalt(enum mant tok, enum man_type type, const struct man_node *n)
1.19      kristaps  147: {
1.34      kristaps  148:        enum rew         c;
1.1       kristaps  149:
1.38      kristaps  150:        /* We cannot progress beyond the root ever. */
1.19      kristaps  151:        if (MAN_ROOT == n->type)
                    152:                return(REW_HALT);
1.38      kristaps  153:
1.19      kristaps  154:        assert(n->parent);
1.38      kristaps  155:
                    156:        /* Normal nodes shouldn't go to the level of the root. */
1.19      kristaps  157:        if (MAN_ROOT == n->parent->type)
                    158:                return(REW_REWIND);
1.38      kristaps  159:
                    160:        /* Already-validated nodes should be closed out. */
1.19      kristaps  161:        if (MAN_VALID & n->flags)
                    162:                return(REW_NOHALT);
                    163:
1.38      kristaps  164:        /* First: rewind to ourselves. */
1.73      schwarze  165:        if (type == n->type && tok == n->tok) {
                    166:                if (MAN_EXPLICIT & man_macros[n->tok].flags)
                    167:                        return(REW_HALT);
                    168:                else
                    169:                        return(REW_REWIND);
                    170:        }
1.21      kristaps  171:
1.82      schwarze  172:        /*
1.38      kristaps  173:         * Next follow the implicit scope-smashings as defined by man.7:
                    174:         * section, sub-section, etc.
                    175:         */
                    176:
1.19      kristaps  177:        switch (tok) {
1.82      schwarze  178:        case MAN_SH:
1.19      kristaps  179:                break;
1.82      schwarze  180:        case MAN_SS:
1.20      kristaps  181:                /* Rewind to a section, if a block. */
1.21      kristaps  182:                if (REW_NOHALT != (c = rew_block(MAN_SH, type, n)))
                    183:                        return(c);
                    184:                break;
1.82      schwarze  185:        case MAN_RS:
1.73      schwarze  186:                /* Preserve empty paragraphs before RS. */
                    187:                if (0 == n->nchild && (MAN_P == n->tok ||
                    188:                    MAN_PP == n->tok || MAN_LP == n->tok))
                    189:                        return(REW_HALT);
1.21      kristaps  190:                /* Rewind to a subsection, if a block. */
                    191:                if (REW_NOHALT != (c = rew_block(MAN_SS, type, n)))
                    192:                        return(c);
                    193:                /* Rewind to a section, if a block. */
                    194:                if (REW_NOHALT != (c = rew_block(MAN_SH, type, n)))
                    195:                        return(c);
1.19      kristaps  196:                break;
                    197:        default:
1.21      kristaps  198:                /* Rewind to an offsetter, if a block. */
                    199:                if (REW_NOHALT != (c = rew_block(MAN_RS, type, n)))
                    200:                        return(c);
1.20      kristaps  201:                /* Rewind to a subsection, if a block. */
1.21      kristaps  202:                if (REW_NOHALT != (c = rew_block(MAN_SS, type, n)))
                    203:                        return(c);
1.20      kristaps  204:                /* Rewind to a section, if a block. */
1.21      kristaps  205:                if (REW_NOHALT != (c = rew_block(MAN_SH, type, n)))
                    206:                        return(c);
1.19      kristaps  207:                break;
1.3       kristaps  208:        }
1.1       kristaps  209:
1.19      kristaps  210:        return(REW_NOHALT);
                    211: }
1.9       kristaps  212:
1.19      kristaps  213: /*
                    214:  * Rewinding entails ascending the parse tree until a coherent point,
                    215:  * for example, the `SH' macro will close out any intervening `SS'
                    216:  * scopes.  When a scope is closed, it must be validated and actioned.
                    217:  */
                    218: static int
1.75      schwarze  219: rew_scope(enum man_type type, struct man *man, enum mant tok)
1.19      kristaps  220: {
                    221:        struct man_node *n;
1.34      kristaps  222:        enum rew         c;
1.7       kristaps  223:
1.75      schwarze  224:        for (n = man->last; n; n = n->parent) {
1.82      schwarze  225:                /*
1.19      kristaps  226:                 * Whether we should stop immediately (REW_HALT), stop
                    227:                 * and rewind until this point (REW_REWIND), or keep
                    228:                 * rewinding (REW_NOHALT).
                    229:                 */
                    230:                c = rew_dohalt(tok, type, n);
                    231:                if (REW_HALT == c)
                    232:                        return(1);
                    233:                if (REW_REWIND == c)
1.7       kristaps  234:                        break;
1.6       kristaps  235:        }
1.1       kristaps  236:
1.82      schwarze  237:        /*
1.38      kristaps  238:         * Rewind until the current point.  Warn if we're a roff
                    239:         * instruction that's mowing over explicit scopes.
                    240:         */
                    241:        assert(n);
1.19      kristaps  242:
1.83    ! schwarze  243:        return(man_unscope(man, n));
1.19      kristaps  244: }
                    245:
1.6       kristaps  246:
1.36      kristaps  247: /*
                    248:  * Close out a generic explicit macro.
                    249:  */
1.35      kristaps  250: int
1.21      kristaps  251: blk_close(MACRO_PROT_ARGS)
                    252: {
1.82      schwarze  253:        enum mant                ntok;
1.21      kristaps  254:        const struct man_node   *nn;
                    255:
                    256:        switch (tok) {
1.82      schwarze  257:        case MAN_RE:
1.21      kristaps  258:                ntok = MAN_RS;
1.76      schwarze  259:                break;
1.82      schwarze  260:        case MAN_UE:
1.76      schwarze  261:                ntok = MAN_UR;
1.21      kristaps  262:                break;
                    263:        default:
                    264:                abort();
                    265:                /* NOTREACHED */
                    266:        }
                    267:
1.75      schwarze  268:        for (nn = man->last->parent; nn; nn = nn->parent)
1.73      schwarze  269:                if (ntok == nn->tok && MAN_BLOCK == nn->type)
1.21      kristaps  270:                        break;
                    271:
1.77      schwarze  272:        if (NULL == nn) {
                    273:                man_pmsg(man, line, ppos, MANDOCERR_NOSCOPE);
                    274:                if ( ! rew_scope(MAN_BLOCK, man, MAN_PP))
                    275:                        return(0);
1.82      schwarze  276:        } else
1.83    ! schwarze  277:                man_unscope(man, nn);
1.21      kristaps  278:
                    279:        return(1);
                    280: }
                    281:
1.35      kristaps  282: int
                    283: blk_exp(MACRO_PROT_ARGS)
                    284: {
1.73      schwarze  285:        struct man_node *n;
1.59      kristaps  286:        int              la;
1.35      kristaps  287:        char            *p;
                    288:
1.73      schwarze  289:        /* Close out prior implicit scopes. */
                    290:
1.75      schwarze  291:        if ( ! rew_scope(MAN_BLOCK, man, tok))
1.73      schwarze  292:                return(0);
1.35      kristaps  293:
1.75      schwarze  294:        if ( ! man_block_alloc(man, line, ppos, tok))
1.35      kristaps  295:                return(0);
1.75      schwarze  296:        if ( ! man_head_alloc(man, line, ppos, tok))
1.35      kristaps  297:                return(0);
                    298:
                    299:        for (;;) {
                    300:                la = *pos;
1.75      schwarze  301:                if ( ! man_args(man, line, pos, buf, &p))
1.35      kristaps  302:                        break;
1.75      schwarze  303:                if ( ! man_word_alloc(man, line, la, p))
1.35      kristaps  304:                        return(0);
                    305:        }
                    306:
1.75      schwarze  307:        assert(man);
1.35      kristaps  308:        assert(tok != MAN_MAX);
                    309:
1.75      schwarze  310:        for (n = man->last; n; n = n->parent) {
1.73      schwarze  311:                if (n->tok != tok)
                    312:                        continue;
                    313:                assert(MAN_HEAD == n->type);
1.83    ! schwarze  314:                man_unscope(man, n);
1.73      schwarze  315:                break;
                    316:        }
                    317:
1.75      schwarze  318:        return(man_body_alloc(man, line, ppos, tok));
1.35      kristaps  319: }
                    320:
1.19      kristaps  321: /*
                    322:  * Parse an implicit-block macro.  These contain a MAN_HEAD and a
                    323:  * MAN_BODY contained within a MAN_BLOCK.  Rules for closing out other
                    324:  * scopes, such as `SH' closing out an `SS', are defined in the rew
                    325:  * routines.
                    326:  */
                    327: int
                    328: blk_imp(MACRO_PROT_ARGS)
                    329: {
1.59      kristaps  330:        int              la;
1.19      kristaps  331:        char            *p;
1.25      kristaps  332:        struct man_node *n;
1.19      kristaps  333:
                    334:        /* Close out prior scopes. */
1.7       kristaps  335:
1.75      schwarze  336:        if ( ! rew_scope(MAN_BODY, man, tok))
1.5       kristaps  337:                return(0);
1.75      schwarze  338:        if ( ! rew_scope(MAN_BLOCK, man, tok))
1.6       kristaps  339:                return(0);
1.1       kristaps  340:
1.19      kristaps  341:        /* Allocate new block & head scope. */
                    342:
1.75      schwarze  343:        if ( ! man_block_alloc(man, line, ppos, tok))
1.19      kristaps  344:                return(0);
1.75      schwarze  345:        if ( ! man_head_alloc(man, line, ppos, tok))
1.19      kristaps  346:                return(0);
1.1       kristaps  347:
1.75      schwarze  348:        n = man->last;
1.25      kristaps  349:
1.19      kristaps  350:        /* Add line arguments. */
1.3       kristaps  351:
1.19      kristaps  352:        for (;;) {
                    353:                la = *pos;
1.75      schwarze  354:                if ( ! man_args(man, line, pos, buf, &p))
1.19      kristaps  355:                        break;
1.75      schwarze  356:                if ( ! man_word_alloc(man, line, la, p))
1.6       kristaps  357:                        return(0);
                    358:        }
                    359:
1.19      kristaps  360:        /* Close out head and open body (unless MAN_SCOPE). */
                    361:
1.27      kristaps  362:        if (MAN_SCOPED & man_macros[tok].flags) {
                    363:                /* If we're forcing scope (`TP'), keep it open. */
                    364:                if (MAN_FSCOPED & man_macros[tok].flags) {
1.75      schwarze  365:                        man->flags |= MAN_BLINE;
1.27      kristaps  366:                        return(1);
1.75      schwarze  367:                } else if (n == man->last) {
                    368:                        man->flags |= MAN_BLINE;
1.27      kristaps  369:                        return(1);
                    370:                }
                    371:        }
                    372:
1.75      schwarze  373:        if ( ! rew_scope(MAN_HEAD, man, tok))
1.6       kristaps  374:                return(0);
1.75      schwarze  375:        return(man_body_alloc(man, line, ppos, tok));
1.4       kristaps  376: }
                    377:
1.19      kristaps  378: int
                    379: in_line_eoln(MACRO_PROT_ARGS)
1.3       kristaps  380: {
1.59      kristaps  381:        int              la;
1.19      kristaps  382:        char            *p;
                    383:        struct man_node *n;
1.3       kristaps  384:
1.75      schwarze  385:        if ( ! man_elem_alloc(man, line, ppos, tok))
1.3       kristaps  386:                return(0);
                    387:
1.75      schwarze  388:        n = man->last;
1.3       kristaps  389:
1.19      kristaps  390:        for (;;) {
                    391:                la = *pos;
1.75      schwarze  392:                if ( ! man_args(man, line, pos, buf, &p))
1.19      kristaps  393:                        break;
1.75      schwarze  394:                if ( ! man_word_alloc(man, line, la, p))
1.19      kristaps  395:                        return(0);
                    396:        }
1.78      schwarze  397:
                    398:        /*
                    399:         * Append MAN_EOS in case the last snipped argument
                    400:         * ends with a dot, e.g. `.IR syslog (3).'
                    401:         */
                    402:
                    403:        if (n != man->last &&
1.80      schwarze  404:            mandoc_eos(man->last->string, strlen(man->last->string)))
1.78      schwarze  405:                man->last->flags |= MAN_EOS;
1.3       kristaps  406:
1.31      kristaps  407:        /*
                    408:         * If no arguments are specified and this is MAN_SCOPED (i.e.,
                    409:         * next-line scoped), then set our mode to indicate that we're
                    410:         * waiting for terms to load into our context.
                    411:         */
                    412:
1.75      schwarze  413:        if (n == man->last && MAN_SCOPED & man_macros[tok].flags) {
1.31      kristaps  414:                assert( ! (MAN_NSCOPED & man_macros[tok].flags));
1.75      schwarze  415:                man->flags |= MAN_ELINE;
1.19      kristaps  416:                return(1);
1.82      schwarze  417:        }
1.3       kristaps  418:
1.31      kristaps  419:        /* Set ignorable context, if applicable. */
                    420:
                    421:        if (MAN_NSCOPED & man_macros[tok].flags) {
                    422:                assert( ! (MAN_SCOPED & man_macros[tok].flags));
1.75      schwarze  423:                man->flags |= MAN_ILINE;
1.31      kristaps  424:        }
1.64      kristaps  425:
1.75      schwarze  426:        assert(MAN_ROOT != man->last->type);
                    427:        man->next = MAN_NEXT_SIBLING;
1.82      schwarze  428:
1.19      kristaps  429:        /*
1.31      kristaps  430:         * Rewind our element scope.  Note that when TH is pruned, we'll
                    431:         * be back at the root, so make sure that we don't clobber as
                    432:         * its sibling.
1.19      kristaps  433:         */
1.3       kristaps  434:
1.75      schwarze  435:        for ( ; man->last; man->last = man->last->parent) {
                    436:                if (man->last == n)
1.19      kristaps  437:                        break;
1.75      schwarze  438:                if (man->last->type == MAN_ROOT)
1.19      kristaps  439:                        break;
1.75      schwarze  440:                if ( ! man_valid_post(man))
1.19      kristaps  441:                        return(0);
                    442:        }
1.3       kristaps  443:
1.75      schwarze  444:        assert(man->last);
1.3       kristaps  445:
                    446:        /*
1.82      schwarze  447:         * Same here regarding whether we're back at the root.
1.3       kristaps  448:         */
                    449:
1.75      schwarze  450:        if (man->last->type != MAN_ROOT && ! man_valid_post(man))
1.19      kristaps  451:                return(0);
1.3       kristaps  452:
1.19      kristaps  453:        return(1);
                    454: }
1.3       kristaps  455:
                    456:
1.19      kristaps  457: int
1.75      schwarze  458: man_macroend(struct man *man)
1.19      kristaps  459: {
1.22      kristaps  460:
1.83    ! schwarze  461:        return(man_unscope(man, man->first));
1.19      kristaps  462: }
1.3       kristaps  463:
1.60      kristaps  464: static int
1.75      schwarze  465: man_args(struct man *man, int line, int *pos, char *buf, char **v)
1.60      kristaps  466: {
                    467:        char     *start;
                    468:
                    469:        assert(*pos);
                    470:        *v = start = buf + *pos;
                    471:        assert(' ' != *start);
                    472:
                    473:        if ('\0' == *start)
                    474:                return(0);
                    475:
1.75      schwarze  476:        *v = mandoc_getarg(man->parse, v, line, pos);
1.60      kristaps  477:        return(1);
                    478: }

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