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Annotation of mandoc/mdoc_macro.c, Revision 1.123

1.123   ! schwarze    1: /*     $Id: mdoc_macro.c,v 1.122 2013/09/15 18:26:46 schwarze Exp $ */
1.1       kristaps    2: /*
1.116     schwarze    3:  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
1.123   ! schwarze    4:  * Copyright (c) 2010, 2012, 2013 Ingo Schwarze <schwarze@openbsd.org>
1.1       kristaps    5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
1.8       kristaps    7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
1.1       kristaps    9:  *
1.8       kristaps   10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1       kristaps   17:  */
1.40      kristaps   18: #ifdef HAVE_CONFIG_H
                     19: #include "config.h"
                     20: #endif
                     21:
1.1       kristaps   22: #include <assert.h>
                     23: #include <ctype.h>
                     24: #include <stdlib.h>
                     25: #include <stdio.h>
                     26: #include <string.h>
1.38      kristaps   27: #include <time.h>
1.1       kristaps   28:
1.106     kristaps   29: #include "mdoc.h"
1.68      kristaps   30: #include "mandoc.h"
1.1       kristaps   31: #include "libmdoc.h"
1.64      kristaps   32: #include "libmandoc.h"
1.1       kristaps   33:
1.84      schwarze   34: enum   rew {   /* see rew_dohalt() */
                     35:        REWIND_NONE,
                     36:        REWIND_THIS,
                     37:        REWIND_MORE,
1.98      kristaps   38:        REWIND_FORCE,
1.84      schwarze   39:        REWIND_LATER,
1.91      kristaps   40:        REWIND_ERROR
1.51      kristaps   41: };
1.1       kristaps   42:
1.53      kristaps   43: static int             blk_full(MACRO_PROT_ARGS);
                     44: static int             blk_exp_close(MACRO_PROT_ARGS);
                     45: static int             blk_part_exp(MACRO_PROT_ARGS);
                     46: static int             blk_part_imp(MACRO_PROT_ARGS);
                     47: static int             ctx_synopsis(MACRO_PROT_ARGS);
                     48: static int             in_line_eoln(MACRO_PROT_ARGS);
                     49: static int             in_line_argn(MACRO_PROT_ARGS);
                     50: static int             in_line(MACRO_PROT_ARGS);
                     51: static int             obsolete(MACRO_PROT_ARGS);
1.75      kristaps   52: static int             phrase_ta(MACRO_PROT_ARGS);
1.53      kristaps   53:
1.123   ! schwarze   54: static int             dword(struct mdoc *, int, int, const char *,
        !            55:                                 enum mdelim, int);
1.53      kristaps   56: static int             append_delims(struct mdoc *,
                     57:                                int, int *, char *);
1.58      kristaps   58: static enum mdoct      lookup(enum mdoct, const char *);
1.53      kristaps   59: static enum mdoct      lookup_raw(const char *);
1.85      schwarze   60: static int             make_pending(struct mdoc_node *, enum mdoct,
1.83      schwarze   61:                                struct mdoc *, int, int);
1.82      kristaps   62: static int             phrase(struct mdoc *, int, int, char *);
1.53      kristaps   63: static enum mdoct      rew_alt(enum mdoct);
                     64: static enum rew        rew_dohalt(enum mdoct, enum mdoc_type,
                     65:                                const struct mdoc_node *);
                     66: static int             rew_elem(struct mdoc *, enum mdoct);
                     67: static int             rew_last(struct mdoc *,
                     68:                                const struct mdoc_node *);
                     69: static int             rew_sub(enum mdoc_type, struct mdoc *,
                     70:                                enum mdoct, int, int);
1.1       kristaps   71:
                     72: const  struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
1.123   ! schwarze   73:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ap */
1.1       kristaps   74:        { in_line_eoln, MDOC_PROLOGUE }, /* Dd */
                     75:        { in_line_eoln, MDOC_PROLOGUE }, /* Dt */
                     76:        { in_line_eoln, MDOC_PROLOGUE }, /* Os */
1.123   ! schwarze   77:        { blk_full, MDOC_PARSED | MDOC_JOIN }, /* Sh */
        !            78:        { blk_full, MDOC_PARSED | MDOC_JOIN }, /* Ss */
        !            79:        { in_line_eoln, 0 }, /* Pp */
        !            80:        { blk_part_imp, MDOC_PARSED | MDOC_JOIN }, /* D1 */
        !            81:        { blk_part_imp, MDOC_PARSED | MDOC_JOIN }, /* Dl */
1.1       kristaps   82:        { blk_full, MDOC_EXPLICIT }, /* Bd */
1.123   ! schwarze   83:        { blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Ed */
1.1       kristaps   84:        { blk_full, MDOC_EXPLICIT }, /* Bl */
1.123   ! schwarze   85:        { blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* El */
        !            86:        { blk_full, MDOC_PARSED | MDOC_JOIN }, /* It */
        !            87:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ad */
        !            88:        { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* An */
1.1       kristaps   89:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ar */
1.23      kristaps   90:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cd */
1.1       kristaps   91:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cm */
1.123   ! schwarze   92:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Dv */
        !            93:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Er */
        !            94:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ev */
1.1       kristaps   95:        { in_line_eoln, 0 }, /* Ex */
1.123   ! schwarze   96:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fa */
        !            97:        { in_line_eoln, 0 }, /* Fd */
1.1       kristaps   98:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fl */
1.123   ! schwarze   99:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fn */
        !           100:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ft */
        !           101:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ic */
1.18      kristaps  102:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* In */
1.123   ! schwarze  103:        { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Li */
        !           104:        { blk_full, MDOC_JOIN }, /* Nd */
        !           105:        { ctx_synopsis, MDOC_CALLABLE | MDOC_PARSED }, /* Nm */
1.1       kristaps  106:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Op */
                    107:        { obsolete, 0 }, /* Ot */
                    108:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Pa */
                    109:        { in_line_eoln, 0 }, /* Rv */
1.123   ! schwarze  110:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* St */
1.1       kristaps  111:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Va */
1.123   ! schwarze  112:        { ctx_synopsis, MDOC_CALLABLE | MDOC_PARSED }, /* Vt */
1.42      kristaps  113:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Xr */
1.123   ! schwarze  114:        { in_line_eoln, MDOC_JOIN }, /* %A */
        !           115:        { in_line_eoln, MDOC_JOIN }, /* %B */
        !           116:        { in_line_eoln, MDOC_JOIN }, /* %D */
        !           117:        { in_line_eoln, MDOC_JOIN }, /* %I */
        !           118:        { in_line_eoln, MDOC_JOIN }, /* %J */
1.1       kristaps  119:        { in_line_eoln, 0 }, /* %N */
1.123   ! schwarze  120:        { in_line_eoln, MDOC_JOIN }, /* %O */
1.1       kristaps  121:        { in_line_eoln, 0 }, /* %P */
1.123   ! schwarze  122:        { in_line_eoln, MDOC_JOIN }, /* %R */
        !           123:        { in_line_eoln, MDOC_JOIN }, /* %T */
1.1       kristaps  124:        { in_line_eoln, 0 }, /* %V */
1.123   ! schwarze  125:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
        !           126:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Ac */
        !           127:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
        !           128:                        MDOC_EXPLICIT | MDOC_JOIN }, /* Ao */
        !           129:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Aq */
1.1       kristaps  130:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* At */
1.123   ! schwarze  131:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
        !           132:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Bc */
        !           133:        { blk_full, MDOC_EXPLICIT }, /* Bf */
        !           134:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
        !           135:                        MDOC_EXPLICIT | MDOC_JOIN }, /* Bo */
        !           136:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Bq */
1.1       kristaps  137:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bsx */
                    138:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bx */
                    139:        { in_line_eoln, 0 }, /* Db */
1.123   ! schwarze  140:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
        !           141:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Dc */
        !           142:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
        !           143:                        MDOC_EXPLICIT | MDOC_JOIN }, /* Do */
        !           144:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Dq */
        !           145:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Ec */
        !           146:        { blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Ef */
        !           147:        { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Em */
1.1       kristaps  148:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Eo */
                    149:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Fx */
1.11      kristaps  150:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ms */
1.123   ! schwarze  151:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED |
        !           152:                        MDOC_IGNDELIM | MDOC_JOIN }, /* No */
        !           153:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED |
        !           154:                        MDOC_IGNDELIM | MDOC_JOIN }, /* Ns */
1.1       kristaps  155:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Nx */
                    156:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ox */
1.123   ! schwarze  157:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
        !           158:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Pc */
1.52      kristaps  159:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_IGNDELIM }, /* Pf */
1.123   ! schwarze  160:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
        !           161:                        MDOC_EXPLICIT | MDOC_JOIN }, /* Po */
        !           162:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Pq */
        !           163:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
        !           164:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Qc */
        !           165:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ql */
        !           166:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
        !           167:                        MDOC_EXPLICIT | MDOC_JOIN }, /* Qo */
        !           168:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Qq */
        !           169:        { blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Re */
1.1       kristaps  170:        { blk_full, MDOC_EXPLICIT }, /* Rs */
1.123   ! schwarze  171:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
        !           172:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Sc */
        !           173:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
        !           174:                        MDOC_EXPLICIT | MDOC_JOIN }, /* So */
        !           175:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Sq */
1.1       kristaps  176:        { in_line_eoln, 0 }, /* Sm */
1.123   ! schwarze  177:        { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Sx */
        !           178:        { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Sy */
1.1       kristaps  179:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Tn */
1.123   ! schwarze  180:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ux */
1.1       kristaps  181:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Xc */
                    182:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Xo */
1.123   ! schwarze  183:        { blk_full, MDOC_EXPLICIT | MDOC_CALLABLE }, /* Fo */
        !           184:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
        !           185:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Fc */
        !           186:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
        !           187:                        MDOC_EXPLICIT | MDOC_JOIN }, /* Oo */
        !           188:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
        !           189:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Oc */
1.1       kristaps  190:        { blk_full, MDOC_EXPLICIT }, /* Bk */
1.123   ! schwarze  191:        { blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Ek */
1.1       kristaps  192:        { in_line_eoln, 0 }, /* Bt */
                    193:        { in_line_eoln, 0 }, /* Hf */
                    194:        { obsolete, 0 }, /* Fr */
                    195:        { in_line_eoln, 0 }, /* Ud */
1.69      kristaps  196:        { in_line, 0 }, /* Lb */
1.123   ! schwarze  197:        { in_line_eoln, 0 }, /* Lp */
        !           198:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Lk */
        !           199:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Mt */
        !           200:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Brq */
        !           201:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
        !           202:                        MDOC_EXPLICIT | MDOC_JOIN }, /* Bro */
        !           203:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
        !           204:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Brc */
        !           205:        { in_line_eoln, MDOC_JOIN }, /* %C */
1.1       kristaps  206:        { obsolete, 0 }, /* Es */
                    207:        { obsolete, 0 }, /* En */
                    208:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Dx */
1.123   ! schwarze  209:        { in_line_eoln, MDOC_JOIN }, /* %Q */
1.20      kristaps  210:        { in_line_eoln, 0 }, /* br */
                    211:        { in_line_eoln, 0 }, /* sp */
1.37      kristaps  212:        { in_line_eoln, 0 }, /* %U */
1.123   ! schwarze  213:        { phrase_ta, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ta */
1.1       kristaps  214: };
                    215:
                    216: const  struct mdoc_macro * const mdoc_macros = __mdoc_macros;
                    217:
                    218:
                    219: /*
                    220:  * This is called at the end of parsing.  It must traverse up the tree,
                    221:  * closing out open [implicit] scopes.  Obviously, open explicit scopes
                    222:  * are errors.
                    223:  */
                    224: int
1.119     schwarze  225: mdoc_macroend(struct mdoc *mdoc)
1.1       kristaps  226: {
                    227:        struct mdoc_node *n;
                    228:
                    229:        /* Scan for open explicit scopes. */
                    230:
1.119     schwarze  231:        n = MDOC_VALID & mdoc->last->flags ?
                    232:                        mdoc->last->parent : mdoc->last;
1.1       kristaps  233:
1.94      schwarze  234:        for ( ; n; n = n->parent)
                    235:                if (MDOC_BLOCK == n->type &&
                    236:                    MDOC_EXPLICIT & mdoc_macros[n->tok].flags)
1.119     schwarze  237:                        mdoc_nmsg(mdoc, n, MANDOCERR_SCOPEEXIT);
1.1       kristaps  238:
1.32      kristaps  239:        /* Rewind to the first. */
                    240:
1.119     schwarze  241:        return(rew_last(mdoc, mdoc->first));
1.1       kristaps  242: }
                    243:
1.32      kristaps  244:
                    245: /*
                    246:  * Look up a macro from within a subsequent context.
                    247:  */
1.53      kristaps  248: static enum mdoct
1.58      kristaps  249: lookup(enum mdoct from, const char *p)
1.28      kristaps  250: {
                    251:
                    252:        if ( ! (MDOC_PARSED & mdoc_macros[from].flags))
                    253:                return(MDOC_MAX);
1.35      kristaps  254:        return(lookup_raw(p));
1.28      kristaps  255: }
                    256:
                    257:
1.32      kristaps  258: /*
                    259:  * Lookup a macro following the initial line macro.
                    260:  */
1.53      kristaps  261: static enum mdoct
1.35      kristaps  262: lookup_raw(const char *p)
1.1       kristaps  263: {
1.58      kristaps  264:        enum mdoct       res;
1.1       kristaps  265:
1.34      kristaps  266:        if (MDOC_MAX == (res = mdoc_hash_find(p)))
1.28      kristaps  267:                return(MDOC_MAX);
                    268:        if (MDOC_CALLABLE & mdoc_macros[res].flags)
1.1       kristaps  269:                return(res);
                    270:        return(MDOC_MAX);
                    271: }
                    272:
                    273:
                    274: static int
1.32      kristaps  275: rew_last(struct mdoc *mdoc, const struct mdoc_node *to)
1.1       kristaps  276: {
1.100     kristaps  277:        struct mdoc_node *n, *np;
1.1       kristaps  278:
                    279:        assert(to);
                    280:        mdoc->next = MDOC_NEXT_SIBLING;
                    281:
                    282:        /* LINTED */
                    283:        while (mdoc->last != to) {
1.100     kristaps  284:                /*
                    285:                 * Save the parent here, because we may delete the
1.119     schwarze  286:                 * mdoc->last node in the post-validation phase and reset
                    287:                 * it to mdoc->last->parent, causing a step in the closing
1.100     kristaps  288:                 * out to be lost.
                    289:                 */
                    290:                np = mdoc->last->parent;
1.1       kristaps  291:                if ( ! mdoc_valid_post(mdoc))
                    292:                        return(0);
1.99      kristaps  293:                n = mdoc->last;
1.100     kristaps  294:                mdoc->last = np;
1.1       kristaps  295:                assert(mdoc->last);
1.99      kristaps  296:                mdoc->last->last = n;
1.1       kristaps  297:        }
                    298:
1.97      kristaps  299:        return(mdoc_valid_post(mdoc));
1.1       kristaps  300: }
                    301:
                    302:
1.32      kristaps  303: /*
1.84      schwarze  304:  * For a block closing macro, return the corresponding opening one.
                    305:  * Otherwise, return the macro itself.
1.32      kristaps  306:  */
1.47      kristaps  307: static enum mdoct
                    308: rew_alt(enum mdoct tok)
1.1       kristaps  309: {
                    310:        switch (tok) {
                    311:        case (MDOC_Ac):
                    312:                return(MDOC_Ao);
                    313:        case (MDOC_Bc):
                    314:                return(MDOC_Bo);
                    315:        case (MDOC_Brc):
                    316:                return(MDOC_Bro);
                    317:        case (MDOC_Dc):
                    318:                return(MDOC_Do);
                    319:        case (MDOC_Ec):
                    320:                return(MDOC_Eo);
                    321:        case (MDOC_Ed):
                    322:                return(MDOC_Bd);
                    323:        case (MDOC_Ef):
                    324:                return(MDOC_Bf);
                    325:        case (MDOC_Ek):
                    326:                return(MDOC_Bk);
                    327:        case (MDOC_El):
                    328:                return(MDOC_Bl);
                    329:        case (MDOC_Fc):
                    330:                return(MDOC_Fo);
                    331:        case (MDOC_Oc):
                    332:                return(MDOC_Oo);
                    333:        case (MDOC_Pc):
                    334:                return(MDOC_Po);
                    335:        case (MDOC_Qc):
                    336:                return(MDOC_Qo);
                    337:        case (MDOC_Re):
                    338:                return(MDOC_Rs);
                    339:        case (MDOC_Sc):
                    340:                return(MDOC_So);
                    341:        case (MDOC_Xc):
                    342:                return(MDOC_Xo);
                    343:        default:
1.84      schwarze  344:                return(tok);
1.1       kristaps  345:        }
                    346:        /* NOTREACHED */
                    347: }
                    348:
                    349:
1.84      schwarze  350: /*
                    351:  * Rewinding to tok, how do we have to handle *p?
                    352:  * REWIND_NONE: *p would delimit tok, but no tok scope is open
                    353:  *   inside *p, so there is no need to rewind anything at all.
                    354:  * REWIND_THIS: *p matches tok, so rewind *p and nothing else.
                    355:  * REWIND_MORE: *p is implicit, rewind it and keep searching for tok.
1.98      kristaps  356:  * REWIND_FORCE: *p is explicit, but tok is full, force rewinding *p.
1.84      schwarze  357:  * REWIND_LATER: *p is explicit and still open, postpone rewinding.
                    358:  * REWIND_ERROR: No tok block is open at all.
1.1       kristaps  359:  */
1.51      kristaps  360: static enum rew
1.47      kristaps  361: rew_dohalt(enum mdoct tok, enum mdoc_type type,
                    362:                const struct mdoc_node *p)
1.1       kristaps  363: {
                    364:
1.86      schwarze  365:        /*
                    366:         * No matching token, no delimiting block, no broken block.
                    367:         * This can happen when full implicit macros are called for
                    368:         * the first time but try to rewind their previous
                    369:         * instance anyway.
                    370:         */
1.1       kristaps  371:        if (MDOC_ROOT == p->type)
1.84      schwarze  372:                return(MDOC_BLOCK == type &&
                    373:                    MDOC_EXPLICIT & mdoc_macros[tok].flags ?
                    374:                    REWIND_ERROR : REWIND_NONE);
1.86      schwarze  375:
                    376:        /*
                    377:         * When starting to rewind, skip plain text
                    378:         * and nodes that have already been rewound.
                    379:         */
1.84      schwarze  380:        if (MDOC_TEXT == p->type || MDOC_VALID & p->flags)
                    381:                return(REWIND_MORE);
                    382:
1.86      schwarze  383:        /*
                    384:         * The easiest case:  Found a matching token.
                    385:         * This applies to both blocks and elements.
                    386:         */
1.84      schwarze  387:        tok = rew_alt(tok);
                    388:        if (tok == p->tok)
                    389:                return(p->end ? REWIND_NONE :
                    390:                    type == p->type ? REWIND_THIS : REWIND_MORE);
                    391:
1.86      schwarze  392:        /*
                    393:         * While elements do require rewinding for themselves,
                    394:         * they never affect rewinding of other nodes.
                    395:         */
1.84      schwarze  396:        if (MDOC_ELEM == p->type)
                    397:                return(REWIND_MORE);
1.1       kristaps  398:
1.86      schwarze  399:        /*
                    400:         * Blocks delimited by our target token get REWIND_MORE.
                    401:         * Blocks delimiting our target token get REWIND_NONE.
                    402:         */
1.1       kristaps  403:        switch (tok) {
1.84      schwarze  404:        case (MDOC_Bl):
                    405:                if (MDOC_It == p->tok)
                    406:                        return(REWIND_MORE);
1.1       kristaps  407:                break;
                    408:        case (MDOC_It):
                    409:                if (MDOC_BODY == p->type && MDOC_Bl == p->tok)
1.84      schwarze  410:                        return(REWIND_NONE);
1.1       kristaps  411:                break;
1.84      schwarze  412:        /*
                    413:         * XXX Badly nested block handling still fails badly
                    414:         * when one block is breaking two blocks of the same type.
                    415:         * This is an incomplete and extremely ugly workaround,
                    416:         * required to let the OpenBSD tree build.
                    417:         */
                    418:        case (MDOC_Oo):
                    419:                if (MDOC_Op == p->tok)
                    420:                        return(REWIND_MORE);
1.1       kristaps  421:                break;
1.88      schwarze  422:        case (MDOC_Nm):
                    423:                return(REWIND_NONE);
1.19      kristaps  424:        case (MDOC_Nd):
                    425:                /* FALLTHROUGH */
1.1       kristaps  426:        case (MDOC_Ss):
                    427:                if (MDOC_BODY == p->type && MDOC_Sh == p->tok)
1.84      schwarze  428:                        return(REWIND_NONE);
1.1       kristaps  429:                /* FALLTHROUGH */
                    430:        case (MDOC_Sh):
1.84      schwarze  431:                if (MDOC_Nd == p->tok || MDOC_Ss == p->tok ||
                    432:                    MDOC_Sh == p->tok)
                    433:                        return(REWIND_MORE);
1.1       kristaps  434:                break;
                    435:        default:
                    436:                break;
                    437:        }
                    438:
1.86      schwarze  439:        /*
                    440:         * Default block rewinding rules.
1.88      schwarze  441:         * In particular, always skip block end markers,
                    442:         * and let all blocks rewind Nm children.
1.86      schwarze  443:         */
1.88      schwarze  444:        if (ENDBODY_NOT != p->end || MDOC_Nm == p->tok ||
                    445:            (MDOC_BLOCK == p->type &&
1.86      schwarze  446:            ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)))
                    447:                return(REWIND_MORE);
                    448:
                    449:        /*
1.98      kristaps  450:         * By default, closing out full blocks
                    451:         * forces closing of broken explicit blocks,
                    452:         * while closing out partial blocks
                    453:         * allows delayed rewinding by default.
1.86      schwarze  454:         */
1.98      kristaps  455:        return (&blk_full == mdoc_macros[tok].fp ?
                    456:            REWIND_FORCE : REWIND_LATER);
1.1       kristaps  457: }
                    458:
                    459:
                    460: static int
1.47      kristaps  461: rew_elem(struct mdoc *mdoc, enum mdoct tok)
1.1       kristaps  462: {
                    463:        struct mdoc_node *n;
                    464:
                    465:        n = mdoc->last;
                    466:        if (MDOC_ELEM != n->type)
                    467:                n = n->parent;
                    468:        assert(MDOC_ELEM == n->type);
                    469:        assert(tok == n->tok);
                    470:
                    471:        return(rew_last(mdoc, n));
                    472: }
                    473:
                    474:
1.83      schwarze  475: /*
                    476:  * We are trying to close a block identified by tok,
                    477:  * but the child block *broken is still open.
                    478:  * Thus, postpone closing the tok block
                    479:  * until the rew_sub call closing *broken.
                    480:  */
                    481: static int
                    482: make_pending(struct mdoc_node *broken, enum mdoct tok,
1.119     schwarze  483:                struct mdoc *mdoc, int line, int ppos)
1.83      schwarze  484: {
                    485:        struct mdoc_node *breaker;
                    486:
                    487:        /*
                    488:         * Iterate backwards, searching for the block matching tok,
                    489:         * that is, the block breaking the *broken block.
                    490:         */
                    491:        for (breaker = broken->parent; breaker; breaker = breaker->parent) {
                    492:
                    493:                /*
                    494:                 * If the *broken block had already been broken before
                    495:                 * and we encounter its breaker, make the tok block
                    496:                 * pending on the inner breaker.
                    497:                 * Graphically, "[A breaker=[B broken=[C->B B] tok=A] C]"
                    498:                 * becomes "[A broken=[B [C->B B] tok=A] C]"
                    499:                 * and finally "[A [B->A [C->B B] A] C]".
                    500:                 */
                    501:                if (breaker == broken->pending) {
                    502:                        broken = breaker;
                    503:                        continue;
                    504:                }
                    505:
1.84      schwarze  506:                if (REWIND_THIS != rew_dohalt(tok, MDOC_BLOCK, breaker))
1.83      schwarze  507:                        continue;
                    508:                if (MDOC_BODY == broken->type)
                    509:                        broken = broken->parent;
                    510:
                    511:                /*
                    512:                 * Found the breaker.
                    513:                 * If another, outer breaker is already pending on
                    514:                 * the *broken block, we must not clobber the link
                    515:                 * to the outer breaker, but make it pending on the
                    516:                 * new, now inner breaker.
                    517:                 * Graphically, "[A breaker=[B broken=[C->A A] tok=B] C]"
                    518:                 * becomes "[A breaker=[B->A broken=[C A] tok=B] C]"
                    519:                 * and finally "[A [B->A [C->B A] B] C]".
                    520:                 */
                    521:                if (broken->pending) {
                    522:                        struct mdoc_node *taker;
                    523:
                    524:                        /*
                    525:                         * If the breaker had also been broken before,
                    526:                         * it cannot take on the outer breaker itself,
                    527:                         * but must hand it on to its own breakers.
                    528:                         * Graphically, this is the following situation:
                    529:                         * "[A [B breaker=[C->B B] broken=[D->A A] tok=C] D]"
                    530:                         * "[A taker=[B->A breaker=[C->B B] [D->C A] C] D]"
                    531:                         */
                    532:                        taker = breaker;
                    533:                        while (taker->pending)
                    534:                                taker = taker->pending;
                    535:                        taker->pending = broken->pending;
                    536:                }
                    537:                broken->pending = breaker;
1.119     schwarze  538:                mandoc_vmsg(MANDOCERR_SCOPENEST, mdoc->parse, line, ppos,
1.104     kristaps  539:                                "%s breaks %s", mdoc_macronames[tok],
                    540:                                mdoc_macronames[broken->tok]);
1.83      schwarze  541:                return(1);
                    542:        }
                    543:
                    544:        /*
                    545:         * Found no matching block for tok.
                    546:         * Are you trying to close a block that is not open?
                    547:         */
                    548:        return(0);
                    549: }
                    550:
1.84      schwarze  551:
1.1       kristaps  552: static int
1.119     schwarze  553: rew_sub(enum mdoc_type t, struct mdoc *mdoc,
1.47      kristaps  554:                enum mdoct tok, int line, int ppos)
1.1       kristaps  555: {
                    556:        struct mdoc_node *n;
                    557:
1.119     schwarze  558:        n = mdoc->last;
1.84      schwarze  559:        while (n) {
                    560:                switch (rew_dohalt(tok, t, n)) {
                    561:                case (REWIND_NONE):
                    562:                        return(1);
                    563:                case (REWIND_THIS):
                    564:                        break;
1.98      kristaps  565:                case (REWIND_FORCE):
1.119     schwarze  566:                        mandoc_vmsg(MANDOCERR_SCOPEBROKEN, mdoc->parse,
1.104     kristaps  567:                                        line, ppos, "%s breaks %s",
                    568:                                        mdoc_macronames[tok],
                    569:                                        mdoc_macronames[n->tok]);
1.98      kristaps  570:                        /* FALLTHROUGH */
1.84      schwarze  571:                case (REWIND_MORE):
                    572:                        n = n->parent;
                    573:                        continue;
                    574:                case (REWIND_LATER):
1.119     schwarze  575:                        if (make_pending(n, tok, mdoc, line, ppos) ||
1.98      kristaps  576:                            MDOC_BLOCK != t)
                    577:                                return(1);
                    578:                        /* FALLTHROUGH */
1.84      schwarze  579:                case (REWIND_ERROR):
1.119     schwarze  580:                        mdoc_pmsg(mdoc, line, ppos, MANDOCERR_NOSCOPE);
1.98      kristaps  581:                        return(1);
1.32      kristaps  582:                }
1.84      schwarze  583:                break;
1.1       kristaps  584:        }
                    585:
                    586:        assert(n);
1.119     schwarze  587:        if ( ! rew_last(mdoc, n))
1.47      kristaps  588:                return(0);
                    589:
                    590:        /*
1.83      schwarze  591:         * The current block extends an enclosing block.
                    592:         * Now that the current block ends, close the enclosing block, too.
1.47      kristaps  593:         */
1.83      schwarze  594:        while (NULL != (n = n->pending)) {
1.119     schwarze  595:                if ( ! rew_last(mdoc, n))
1.47      kristaps  596:                        return(0);
1.83      schwarze  597:                if (MDOC_HEAD == n->type &&
1.119     schwarze  598:                    ! mdoc_body_alloc(mdoc, n->line, n->pos, n->tok))
1.47      kristaps  599:                        return(0);
                    600:        }
                    601:
                    602:        return(1);
1.1       kristaps  603: }
                    604:
1.105     kristaps  605: /*
                    606:  * Allocate a word and check whether it's punctuation or not.
                    607:  * Punctuation consists of those tokens found in mdoc_isdelim().
                    608:  */
                    609: static int
1.123   ! schwarze  610: dword(struct mdoc *mdoc, int line, int col, const char *p,
        !           611:                enum mdelim d, int may_append)
1.105     kristaps  612: {
                    613:
                    614:        if (DELIM_MAX == d)
                    615:                d = mdoc_isdelim(p);
                    616:
1.123   ! schwarze  617:        if (may_append &&
        !           618:            ! ((MDOC_SYNOPSIS | MDOC_KEEP | MDOC_SMOFF) & mdoc->flags) &&
        !           619:            DELIM_NONE == d && MDOC_TEXT == mdoc->last->type &&
        !           620:            DELIM_NONE == mdoc_isdelim(mdoc->last->string)) {
        !           621:                mdoc_word_append(mdoc, p);
        !           622:                return(1);
        !           623:        }
        !           624:
1.119     schwarze  625:        if ( ! mdoc_word_alloc(mdoc, line, col, p))
1.105     kristaps  626:                return(0);
                    627:
                    628:        if (DELIM_OPEN == d)
1.119     schwarze  629:                mdoc->last->flags |= MDOC_DELIMO;
1.108     schwarze  630:
                    631:        /*
                    632:         * Closing delimiters only suppress the preceding space
                    633:         * when they follow something, not when they start a new
                    634:         * block or element, and not when they follow `No'.
                    635:         *
                    636:         * XXX  Explicitly special-casing MDOC_No here feels
                    637:         *      like a layering violation.  Find a better way
                    638:         *      and solve this in the code related to `No'!
                    639:         */
                    640:
1.119     schwarze  641:        else if (DELIM_CLOSE == d && mdoc->last->prev &&
1.120     schwarze  642:                        mdoc->last->prev->tok != MDOC_No &&
                    643:                        mdoc->last->parent->tok != MDOC_Fd)
1.119     schwarze  644:                mdoc->last->flags |= MDOC_DELIMC;
1.105     kristaps  645:
                    646:        return(1);
                    647: }
1.1       kristaps  648:
                    649: static int
1.119     schwarze  650: append_delims(struct mdoc *mdoc, int line, int *pos, char *buf)
1.1       kristaps  651: {
1.66      kristaps  652:        int              la;
1.55      kristaps  653:        enum margserr    ac;
1.1       kristaps  654:        char            *p;
                    655:
1.66      kristaps  656:        if ('\0' == buf[*pos])
1.1       kristaps  657:                return(1);
                    658:
                    659:        for (;;) {
1.66      kristaps  660:                la = *pos;
1.119     schwarze  661:                ac = mdoc_zargs(mdoc, line, pos, buf, &p);
1.1       kristaps  662:
1.53      kristaps  663:                if (ARGS_ERROR == ac)
1.1       kristaps  664:                        return(0);
1.53      kristaps  665:                else if (ARGS_EOLN == ac)
1.1       kristaps  666:                        break;
1.66      kristaps  667:
1.123   ! schwarze  668:                dword(mdoc, line, la, p, DELIM_MAX, 1);
1.66      kristaps  669:
                    670:                /*
                    671:                 * If we encounter end-of-sentence symbols, then trigger
                    672:                 * the double-space.
                    673:                 *
1.109     kristaps  674:                 * XXX: it's easy to allow this to propagate outward to
1.66      kristaps  675:                 * the last symbol, such that `. )' will cause the
                    676:                 * correct double-spacing.  However, (1) groff isn't
                    677:                 * smart enough to do this and (2) it would require
                    678:                 * knowing which symbols break this behaviour, for
1.109     kristaps  679:                 * example, `.  ;' shouldn't propagate the double-space.
1.66      kristaps  680:                 */
1.93      schwarze  681:                if (mandoc_eos(p, strlen(p), 0))
1.119     schwarze  682:                        mdoc->last->flags |= MDOC_EOS;
1.1       kristaps  683:        }
                    684:
                    685:        return(1);
                    686: }
                    687:
                    688:
                    689: /*
                    690:  * Close out block partial/full explicit.
                    691:  */
                    692: static int
                    693: blk_exp_close(MACRO_PROT_ARGS)
                    694: {
1.83      schwarze  695:        struct mdoc_node *body;         /* Our own body. */
                    696:        struct mdoc_node *later;        /* A sub-block starting later. */
                    697:        struct mdoc_node *n;            /* For searching backwards. */
                    698:
1.60      kristaps  699:        int              j, lastarg, maxargs, flushed, nl;
1.55      kristaps  700:        enum margserr    ac;
1.83      schwarze  701:        enum mdoct       atok, ntok;
1.1       kristaps  702:        char            *p;
                    703:
1.119     schwarze  704:        nl = MDOC_NEWLINE & mdoc->flags;
1.60      kristaps  705:
1.1       kristaps  706:        switch (tok) {
                    707:        case (MDOC_Ec):
                    708:                maxargs = 1;
                    709:                break;
1.123   ! schwarze  710:        case (MDOC_Ek):
        !           711:                if ( ! (MDOC_SYNOPSIS & mdoc->flags))
        !           712:                        mdoc->flags &= ~MDOC_KEEP;
1.1       kristaps  713:        default:
                    714:                maxargs = 0;
                    715:                break;
                    716:        }
                    717:
1.83      schwarze  718:        /*
                    719:         * Search backwards for beginnings of blocks,
                    720:         * both of our own and of pending sub-blocks.
                    721:         */
                    722:        atok = rew_alt(tok);
                    723:        body = later = NULL;
1.119     schwarze  724:        for (n = mdoc->last; n; n = n->parent) {
1.83      schwarze  725:                if (MDOC_VALID & n->flags)
                    726:                        continue;
                    727:
                    728:                /* Remember the start of our own body. */
                    729:                if (MDOC_BODY == n->type && atok == n->tok) {
1.87      kristaps  730:                        if (ENDBODY_NOT == n->end)
1.83      schwarze  731:                                body = n;
                    732:                        continue;
                    733:                }
                    734:
1.88      schwarze  735:                if (MDOC_BLOCK != n->type || MDOC_Nm == n->tok)
1.83      schwarze  736:                        continue;
                    737:                if (atok == n->tok) {
                    738:                        assert(body);
                    739:
                    740:                        /*
                    741:                         * Found the start of our own block.
                    742:                         * When there is no pending sub block,
                    743:                         * just proceed to closing out.
                    744:                         */
                    745:                        if (NULL == later)
                    746:                                break;
                    747:
                    748:                        /*
                    749:                         * When there is a pending sub block,
                    750:                         * postpone closing out the current block
                    751:                         * until the rew_sub() closing out the sub-block.
                    752:                         */
1.119     schwarze  753:                        make_pending(later, tok, mdoc, line, ppos);
1.83      schwarze  754:
                    755:                        /*
                    756:                         * Mark the place where the formatting - but not
                    757:                         * the scope - of the current block ends.
                    758:                         */
1.119     schwarze  759:                        if ( ! mdoc_endbody_alloc(mdoc, line, ppos,
1.83      schwarze  760:                            atok, body, ENDBODY_SPACE))
                    761:                                return(0);
                    762:                        break;
                    763:                }
                    764:
                    765:                /*
                    766:                 * When finding an open sub block, remember the last
                    767:                 * open explicit block, or, in case there are only
                    768:                 * implicit ones, the first open implicit block.
                    769:                 */
                    770:                if (later &&
                    771:                    MDOC_EXPLICIT & mdoc_macros[later->tok].flags)
                    772:                        continue;
1.118     schwarze  773:                if (MDOC_It != n->tok)
1.83      schwarze  774:                        later = n;
                    775:        }
                    776:
1.1       kristaps  777:        if ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags)) {
1.68      kristaps  778:                /* FIXME: do this in validate */
1.22      kristaps  779:                if (buf[*pos])
1.119     schwarze  780:                        mdoc_pmsg(mdoc, line, ppos, MANDOCERR_ARGSLOST);
1.22      kristaps  781:
1.119     schwarze  782:                if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1.22      kristaps  783:                        return(0);
1.119     schwarze  784:                return(rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos));
1.1       kristaps  785:        }
                    786:
1.119     schwarze  787:        if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1.1       kristaps  788:                return(0);
                    789:
1.83      schwarze  790:        if (NULL == later && maxargs > 0)
1.119     schwarze  791:                if ( ! mdoc_tail_alloc(mdoc, line, ppos, rew_alt(tok)))
1.1       kristaps  792:                        return(0);
                    793:
1.27      kristaps  794:        for (flushed = j = 0; ; j++) {
1.1       kristaps  795:                lastarg = *pos;
                    796:
                    797:                if (j == maxargs && ! flushed) {
1.119     schwarze  798:                        if ( ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
1.1       kristaps  799:                                return(0);
                    800:                        flushed = 1;
                    801:                }
                    802:
1.119     schwarze  803:                ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1.1       kristaps  804:
1.53      kristaps  805:                if (ARGS_ERROR == ac)
1.1       kristaps  806:                        return(0);
1.53      kristaps  807:                if (ARGS_PUNCT == ac)
1.1       kristaps  808:                        break;
1.53      kristaps  809:                if (ARGS_EOLN == ac)
1.1       kristaps  810:                        break;
                    811:
1.54      kristaps  812:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                    813:
                    814:                if (MDOC_MAX == ntok) {
1.123   ! schwarze  815:                        if ( ! dword(mdoc, line, lastarg, p, DELIM_MAX,
        !           816:                            MDOC_JOIN & mdoc_macros[tok].flags))
1.1       kristaps  817:                                return(0);
1.54      kristaps  818:                        continue;
                    819:                }
1.1       kristaps  820:
1.54      kristaps  821:                if ( ! flushed) {
1.119     schwarze  822:                        if ( ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
1.54      kristaps  823:                                return(0);
                    824:                        flushed = 1;
                    825:                }
1.122     schwarze  826:
                    827:                mdoc->flags &= ~MDOC_NEWLINE;
                    828:
1.119     schwarze  829:                if ( ! mdoc_macro(mdoc, ntok, line, lastarg, pos, buf))
1.1       kristaps  830:                        return(0);
1.54      kristaps  831:                break;
1.1       kristaps  832:        }
                    833:
1.119     schwarze  834:        if ( ! flushed && ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
1.1       kristaps  835:                return(0);
                    836:
1.60      kristaps  837:        if ( ! nl)
1.1       kristaps  838:                return(1);
1.119     schwarze  839:        return(append_delims(mdoc, line, pos, buf));
1.1       kristaps  840: }
                    841:
                    842:
                    843: static int
                    844: in_line(MACRO_PROT_ARGS)
                    845: {
1.70      kristaps  846:        int              la, scope, cnt, nc, nl;
1.56      kristaps  847:        enum margverr    av;
1.53      kristaps  848:        enum mdoct       ntok;
1.55      kristaps  849:        enum margserr    ac;
1.67      schwarze  850:        enum mdelim      d;
1.53      kristaps  851:        struct mdoc_arg *arg;
                    852:        char            *p;
1.1       kristaps  853:
1.119     schwarze  854:        nl = MDOC_NEWLINE & mdoc->flags;
1.60      kristaps  855:
1.4       kristaps  856:        /*
                    857:         * Whether we allow ignored elements (those without content,
                    858:         * usually because of reserved words) to squeak by.
                    859:         */
1.45      kristaps  860:
1.4       kristaps  861:        switch (tok) {
1.26      kristaps  862:        case (MDOC_An):
                    863:                /* FALLTHROUGH */
                    864:        case (MDOC_Ar):
1.4       kristaps  865:                /* FALLTHROUGH */
                    866:        case (MDOC_Fl):
                    867:                /* FALLTHROUGH */
1.96      kristaps  868:        case (MDOC_Mt):
1.12      kristaps  869:                /* FALLTHROUGH */
1.26      kristaps  870:        case (MDOC_Nm):
                    871:                /* FALLTHROUGH */
1.25      kristaps  872:        case (MDOC_Pa):
1.4       kristaps  873:                nc = 1;
                    874:                break;
                    875:        default:
                    876:                nc = 0;
                    877:                break;
                    878:        }
                    879:
1.27      kristaps  880:        for (arg = NULL;; ) {
1.1       kristaps  881:                la = *pos;
1.119     schwarze  882:                av = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
1.1       kristaps  883:
1.56      kristaps  884:                if (ARGV_WORD == av) {
1.1       kristaps  885:                        *pos = la;
                    886:                        break;
                    887:                }
1.56      kristaps  888:                if (ARGV_EOLN == av)
1.1       kristaps  889:                        break;
1.56      kristaps  890:                if (ARGV_ARG == av)
1.1       kristaps  891:                        continue;
                    892:
                    893:                mdoc_argv_free(arg);
                    894:                return(0);
                    895:        }
                    896:
1.70      kristaps  897:        for (cnt = scope = 0;; ) {
1.1       kristaps  898:                la = *pos;
1.119     schwarze  899:                ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1.1       kristaps  900:
1.53      kristaps  901:                if (ARGS_ERROR == ac)
1.1       kristaps  902:                        return(0);
1.53      kristaps  903:                if (ARGS_EOLN == ac)
1.1       kristaps  904:                        break;
1.53      kristaps  905:                if (ARGS_PUNCT == ac)
1.1       kristaps  906:                        break;
                    907:
1.53      kristaps  908:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1.1       kristaps  909:
1.4       kristaps  910:                /*
                    911:                 * In this case, we've located a submacro and must
                    912:                 * execute it.  Close out scope, if open.  If no
                    913:                 * elements have been generated, either create one (nc)
                    914:                 * or raise a warning.
                    915:                 */
1.1       kristaps  916:
1.53      kristaps  917:                if (MDOC_MAX != ntok) {
1.119     schwarze  918:                        if (scope && ! rew_elem(mdoc, tok))
1.1       kristaps  919:                                return(0);
1.4       kristaps  920:                        if (nc && 0 == cnt) {
1.119     schwarze  921:                                if ( ! mdoc_elem_alloc(mdoc, line,
                    922:                                                ppos, tok, arg))
1.3       kristaps  923:                                        return(0);
1.119     schwarze  924:                                if ( ! rew_last(mdoc, mdoc->last))
1.12      kristaps  925:                                        return(0);
1.7       kristaps  926:                        } else if ( ! nc && 0 == cnt) {
                    927:                                mdoc_argv_free(arg);
1.119     schwarze  928:                                mdoc_pmsg(mdoc, line, ppos,
                    929:                                        MANDOCERR_MACROEMPTY);
1.7       kristaps  930:                        }
1.103     kristaps  931:
1.119     schwarze  932:                        if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1.1       kristaps  933:                                return(0);
1.60      kristaps  934:                        if ( ! nl)
1.1       kristaps  935:                                return(1);
1.119     schwarze  936:                        return(append_delims(mdoc, line, pos, buf));
1.29      kristaps  937:                }
1.1       kristaps  938:
1.4       kristaps  939:                /*
                    940:                 * Non-quote-enclosed punctuation.  Set up our scope, if
                    941:                 * a word; rewind the scope, if a delimiter; then append
                    942:                 * the word.
                    943:                 */
1.1       kristaps  944:
1.105     kristaps  945:                d = ARGS_QWORD == ac ? DELIM_NONE : mdoc_isdelim(p);
1.3       kristaps  946:
1.70      kristaps  947:                if (DELIM_NONE != d) {
                    948:                        /*
                    949:                         * If we encounter closing punctuation, no word
                    950:                         * has been omitted, no scope is open, and we're
                    951:                         * allowed to have an empty element, then start
                    952:                         * a new scope.  `Ar', `Fl', and `Li', only do
                    953:                         * this once per invocation.  There may be more
                    954:                         * of these (all of them?).
                    955:                         */
                    956:                        if (0 == cnt && (nc || MDOC_Li == tok) &&
                    957:                                        DELIM_CLOSE == d && ! scope) {
1.119     schwarze  958:                                if ( ! mdoc_elem_alloc(mdoc, line,
                    959:                                                ppos, tok, arg))
1.70      kristaps  960:                                        return(0);
                    961:                                if (MDOC_Ar == tok || MDOC_Li == tok ||
                    962:                                                MDOC_Fl == tok)
                    963:                                        cnt++;
                    964:                                scope = 1;
                    965:                        }
                    966:                        /*
                    967:                         * Close out our scope, if one is open, before
                    968:                         * any punctuation.
                    969:                         */
1.119     schwarze  970:                        if (scope && ! rew_elem(mdoc, tok))
1.1       kristaps  971:                                return(0);
1.70      kristaps  972:                        scope = 0;
                    973:                } else if ( ! scope) {
1.119     schwarze  974:                        if ( ! mdoc_elem_alloc(mdoc, line, ppos, tok, arg))
1.1       kristaps  975:                                return(0);
1.70      kristaps  976:                        scope = 1;
1.1       kristaps  977:                }
                    978:
1.67      schwarze  979:                if (DELIM_NONE == d)
1.3       kristaps  980:                        cnt++;
1.105     kristaps  981:
1.123   ! schwarze  982:                if ( ! dword(mdoc, line, la, p, d,
        !           983:                    MDOC_JOIN & mdoc_macros[tok].flags))
1.1       kristaps  984:                        return(0);
1.39      kristaps  985:
                    986:                /*
                    987:                 * `Fl' macros have their scope re-opened with each new
                    988:                 * word so that the `-' can be added to each one without
                    989:                 * having to parse out spaces.
                    990:                 */
1.70      kristaps  991:                if (scope && MDOC_Fl == tok) {
1.119     schwarze  992:                        if ( ! rew_elem(mdoc, tok))
1.39      kristaps  993:                                return(0);
1.70      kristaps  994:                        scope = 0;
1.39      kristaps  995:                }
1.1       kristaps  996:        }
                    997:
1.119     schwarze  998:        if (scope && ! rew_elem(mdoc, tok))
1.1       kristaps  999:                return(0);
1.4       kristaps 1000:
                   1001:        /*
                   1002:         * If no elements have been collected and we're allowed to have
                   1003:         * empties (nc), open a scope and close it out.  Otherwise,
                   1004:         * raise a warning.
                   1005:         */
1.45      kristaps 1006:
1.4       kristaps 1007:        if (nc && 0 == cnt) {
1.119     schwarze 1008:                if ( ! mdoc_elem_alloc(mdoc, line, ppos, tok, arg))
1.3       kristaps 1009:                        return(0);
1.119     schwarze 1010:                if ( ! rew_last(mdoc, mdoc->last))
1.12      kristaps 1011:                        return(0);
1.7       kristaps 1012:        } else if ( ! nc && 0 == cnt) {
                   1013:                mdoc_argv_free(arg);
1.119     schwarze 1014:                mdoc_pmsg(mdoc, line, ppos, MANDOCERR_MACROEMPTY);
1.7       kristaps 1015:        }
1.4       kristaps 1016:
1.60      kristaps 1017:        if ( ! nl)
1.1       kristaps 1018:                return(1);
1.119     schwarze 1019:        return(append_delims(mdoc, line, pos, buf));
1.1       kristaps 1020: }
                   1021:
                   1022:
                   1023: static int
                   1024: blk_full(MACRO_PROT_ARGS)
                   1025: {
1.114     kristaps 1026:        int               la, nl, nparsed;
1.1       kristaps 1027:        struct mdoc_arg  *arg;
1.45      kristaps 1028:        struct mdoc_node *head; /* save of head macro */
1.49      kristaps 1029:        struct mdoc_node *body; /* save of body macro */
1.47      kristaps 1030:        struct mdoc_node *n;
1.74      kristaps 1031:        enum mdoc_type    mtt;
1.53      kristaps 1032:        enum mdoct        ntok;
1.59      kristaps 1033:        enum margserr     ac, lac;
1.56      kristaps 1034:        enum margverr     av;
1.1       kristaps 1035:        char             *p;
                   1036:
1.119     schwarze 1037:        nl = MDOC_NEWLINE & mdoc->flags;
1.63      kristaps 1038:
1.45      kristaps 1039:        /* Close out prior implicit scope. */
1.19      kristaps 1040:
1.1       kristaps 1041:        if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)) {
1.119     schwarze 1042:                if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1.1       kristaps 1043:                        return(0);
1.119     schwarze 1044:                if ( ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
1.1       kristaps 1045:                        return(0);
                   1046:        }
                   1047:
1.45      kristaps 1048:        /*
1.109     kristaps 1049:         * This routine accommodates implicitly- and explicitly-scoped
1.45      kristaps 1050:         * macro openings.  Implicit ones first close out prior scope
                   1051:         * (seen above).  Delay opening the head until necessary to
                   1052:         * allow leading punctuation to print.  Special consideration
                   1053:         * for `It -column', which has phrase-part syntax instead of
                   1054:         * regular child nodes.
                   1055:         */
                   1056:
1.1       kristaps 1057:        for (arg = NULL;; ) {
1.45      kristaps 1058:                la = *pos;
1.119     schwarze 1059:                av = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
1.1       kristaps 1060:
1.56      kristaps 1061:                if (ARGV_WORD == av) {
1.45      kristaps 1062:                        *pos = la;
1.1       kristaps 1063:                        break;
                   1064:                }
                   1065:
1.56      kristaps 1066:                if (ARGV_EOLN == av)
1.1       kristaps 1067:                        break;
1.56      kristaps 1068:                if (ARGV_ARG == av)
1.1       kristaps 1069:                        continue;
                   1070:
                   1071:                mdoc_argv_free(arg);
                   1072:                return(0);
                   1073:        }
                   1074:
1.119     schwarze 1075:        if ( ! mdoc_block_alloc(mdoc, line, ppos, tok, arg))
1.1       kristaps 1076:                return(0);
                   1077:
1.49      kristaps 1078:        head = body = NULL;
1.115     schwarze 1079:
                   1080:        /*
                   1081:         * Exception: Heads of `It' macros in `-diag' lists are not
                   1082:         * parsed, even though `It' macros in general are parsed.
                   1083:         */
                   1084:        nparsed = MDOC_It == tok &&
1.119     schwarze 1085:                MDOC_Bl == mdoc->last->parent->tok &&
                   1086:                LIST_diag == mdoc->last->parent->norm->Bl.type;
1.1       kristaps 1087:
1.45      kristaps 1088:        /*
                   1089:         * The `Nd' macro has all arguments in its body: it's a hybrid
                   1090:         * of block partial-explicit and full-implicit.  Stupid.
                   1091:         */
1.19      kristaps 1092:
1.45      kristaps 1093:        if (MDOC_Nd == tok) {
1.119     schwarze 1094:                if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1.45      kristaps 1095:                        return(0);
1.119     schwarze 1096:                head = mdoc->last;
                   1097:                if ( ! rew_sub(MDOC_HEAD, mdoc, tok, line, ppos))
1.19      kristaps 1098:                        return(0);
1.119     schwarze 1099:                if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.19      kristaps 1100:                        return(0);
1.119     schwarze 1101:                body = mdoc->last;
1.123   ! schwarze 1102:        }
        !          1103:
        !          1104:        if (MDOC_Bk == tok)
        !          1105:                mdoc->flags |= MDOC_KEEP;
1.19      kristaps 1106:
1.59      kristaps 1107:        ac = ARGS_ERROR;
                   1108:
1.62      kristaps 1109:        for ( ; ; ) {
1.45      kristaps 1110:                la = *pos;
1.75      kristaps 1111:                /* Initialise last-phrase-type with ARGS_PEND. */
                   1112:                lac = ARGS_ERROR == ac ? ARGS_PEND : ac;
1.119     schwarze 1113:                ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1.89      schwarze 1114:
                   1115:                if (ARGS_PUNCT == ac)
                   1116:                        break;
1.1       kristaps 1117:
1.53      kristaps 1118:                if (ARGS_ERROR == ac)
1.1       kristaps 1119:                        return(0);
1.75      kristaps 1120:
                   1121:                if (ARGS_EOLN == ac) {
                   1122:                        if (ARGS_PPHRASE != lac && ARGS_PHRASE != lac)
                   1123:                                break;
                   1124:                        /*
                   1125:                         * This is necessary: if the last token on a
                   1126:                         * line is a `Ta' or tab, then we'll get
                   1127:                         * ARGS_EOLN, so we must be smart enough to
                   1128:                         * reopen our scope if the last parse was a
                   1129:                         * phrase or partial phrase.
                   1130:                         */
1.119     schwarze 1131:                        if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1.75      kristaps 1132:                                return(0);
1.119     schwarze 1133:                        if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.75      kristaps 1134:                                return(0);
1.119     schwarze 1135:                        body = mdoc->last;
1.1       kristaps 1136:                        break;
1.75      kristaps 1137:                }
1.45      kristaps 1138:
1.73      kristaps 1139:                /*
                   1140:                 * Emit leading punctuation (i.e., punctuation before
                   1141:                 * the MDOC_HEAD) for non-phrase types.
                   1142:                 */
1.45      kristaps 1143:
1.59      kristaps 1144:                if (NULL == head &&
1.71      kristaps 1145:                                ARGS_PEND != ac &&
1.59      kristaps 1146:                                ARGS_PHRASE != ac &&
1.57      kristaps 1147:                                ARGS_PPHRASE != ac &&
1.53      kristaps 1148:                                ARGS_QWORD != ac &&
1.105     kristaps 1149:                                DELIM_OPEN == mdoc_isdelim(p)) {
1.123   ! schwarze 1150:                        if ( ! dword(mdoc, line, la, p, DELIM_OPEN, 0))
1.45      kristaps 1151:                                return(0);
                   1152:                        continue;
                   1153:                }
                   1154:
1.74      kristaps 1155:                /* Open a head if one hasn't been opened. */
1.45      kristaps 1156:
1.74      kristaps 1157:                if (NULL == head) {
1.119     schwarze 1158:                        if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1.45      kristaps 1159:                                return(0);
1.119     schwarze 1160:                        head = mdoc->last;
1.45      kristaps 1161:                }
                   1162:
1.72      kristaps 1163:                if (ARGS_PHRASE == ac ||
                   1164:                                ARGS_PEND == ac ||
                   1165:                                ARGS_PPHRASE == ac) {
1.73      kristaps 1166:                        /*
1.74      kristaps 1167:                         * If we haven't opened a body yet, rewind the
                   1168:                         * head; if we have, rewind that instead.
                   1169:                         */
                   1170:
                   1171:                        mtt = body ? MDOC_BODY : MDOC_HEAD;
1.119     schwarze 1172:                        if ( ! rew_sub(mtt, mdoc, tok, line, ppos))
1.74      kristaps 1173:                                return(0);
                   1174:
                   1175:                        /* Then allocate our body context. */
                   1176:
1.119     schwarze 1177:                        if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.74      kristaps 1178:                                return(0);
1.119     schwarze 1179:                        body = mdoc->last;
1.74      kristaps 1180:
                   1181:                        /*
1.73      kristaps 1182:                         * Process phrases: set whether we're in a
                   1183:                         * partial-phrase (this effects line handling)
                   1184:                         * then call down into the phrase parser.
                   1185:                         */
1.74      kristaps 1186:
1.65      kristaps 1187:                        if (ARGS_PPHRASE == ac)
1.119     schwarze 1188:                                mdoc->flags |= MDOC_PPHRASE;
1.71      kristaps 1189:                        if (ARGS_PEND == ac && ARGS_PPHRASE == lac)
1.119     schwarze 1190:                                mdoc->flags |= MDOC_PPHRASE;
1.71      kristaps 1191:
1.119     schwarze 1192:                        if ( ! phrase(mdoc, line, la, buf))
1.1       kristaps 1193:                                return(0);
1.71      kristaps 1194:
1.119     schwarze 1195:                        mdoc->flags &= ~MDOC_PPHRASE;
1.1       kristaps 1196:                        continue;
                   1197:                }
                   1198:
1.114     kristaps 1199:                ntok = nparsed || ARGS_QWORD == ac ?
                   1200:                        MDOC_MAX : lookup(tok, p);
1.54      kristaps 1201:
                   1202:                if (MDOC_MAX == ntok) {
1.123   ! schwarze 1203:                        if ( ! dword(mdoc, line, la, p, DELIM_MAX,
        !          1204:                            MDOC_JOIN & mdoc_macros[tok].flags))
1.1       kristaps 1205:                                return(0);
1.53      kristaps 1206:                        continue;
1.45      kristaps 1207:                }
1.53      kristaps 1208:
1.119     schwarze 1209:                if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1.45      kristaps 1210:                        return(0);
1.53      kristaps 1211:                break;
1.45      kristaps 1212:        }
1.1       kristaps 1213:
1.45      kristaps 1214:        if (NULL == head) {
1.119     schwarze 1215:                if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1.1       kristaps 1216:                        return(0);
1.119     schwarze 1217:                head = mdoc->last;
1.1       kristaps 1218:        }
                   1219:
1.119     schwarze 1220:        if (nl && ! append_delims(mdoc, line, pos, buf))
1.1       kristaps 1221:                return(0);
1.19      kristaps 1222:
1.49      kristaps 1223:        /* If we've already opened our body, exit now. */
1.45      kristaps 1224:
1.49      kristaps 1225:        if (NULL != body)
1.77      kristaps 1226:                goto out;
1.19      kristaps 1227:
1.47      kristaps 1228:        /*
1.49      kristaps 1229:         * If there is an open (i.e., unvalidated) sub-block requiring
                   1230:         * explicit close-out, postpone switching the current block from
                   1231:         * head to body until the rew_sub() call closing out that
                   1232:         * sub-block.
1.47      kristaps 1233:         */
1.119     schwarze 1234:        for (n = mdoc->last; n && n != head; n = n->parent) {
1.49      kristaps 1235:                if (MDOC_BLOCK == n->type &&
                   1236:                                MDOC_EXPLICIT & mdoc_macros[n->tok].flags &&
                   1237:                                ! (MDOC_VALID & n->flags)) {
1.47      kristaps 1238:                        n->pending = head;
                   1239:                        return(1);
                   1240:                }
                   1241:        }
                   1242:
1.45      kristaps 1243:        /* Close out scopes to remain in a consistent state. */
                   1244:
1.119     schwarze 1245:        if ( ! rew_sub(MDOC_HEAD, mdoc, tok, line, ppos))
1.1       kristaps 1246:                return(0);
1.119     schwarze 1247:        if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.1       kristaps 1248:                return(0);
                   1249:
1.77      kristaps 1250: out:
1.119     schwarze 1251:        if ( ! (MDOC_FREECOL & mdoc->flags))
1.77      kristaps 1252:                return(1);
                   1253:
1.119     schwarze 1254:        if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1.77      kristaps 1255:                return(0);
1.119     schwarze 1256:        if ( ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
1.77      kristaps 1257:                return(0);
                   1258:
1.119     schwarze 1259:        mdoc->flags &= ~MDOC_FREECOL;
1.1       kristaps 1260:        return(1);
                   1261: }
                   1262:
                   1263:
                   1264: static int
                   1265: blk_part_imp(MACRO_PROT_ARGS)
                   1266: {
1.63      kristaps 1267:        int               la, nl;
1.53      kristaps 1268:        enum mdoct        ntok;
1.55      kristaps 1269:        enum margserr     ac;
1.1       kristaps 1270:        char             *p;
1.43      kristaps 1271:        struct mdoc_node *blk; /* saved block context */
                   1272:        struct mdoc_node *body; /* saved body context */
                   1273:        struct mdoc_node *n;
1.1       kristaps 1274:
1.119     schwarze 1275:        nl = MDOC_NEWLINE & mdoc->flags;
1.63      kristaps 1276:
1.43      kristaps 1277:        /*
                   1278:         * A macro that spans to the end of the line.  This is generally
                   1279:         * (but not necessarily) called as the first macro.  The block
                   1280:         * has a head as the immediate child, which is always empty,
                   1281:         * followed by zero or more opening punctuation nodes, then the
                   1282:         * body (which may be empty, depending on the macro), then zero
                   1283:         * or more closing punctuation nodes.
                   1284:         */
1.32      kristaps 1285:
1.119     schwarze 1286:        if ( ! mdoc_block_alloc(mdoc, line, ppos, tok, NULL))
1.32      kristaps 1287:                return(0);
1.43      kristaps 1288:
1.119     schwarze 1289:        blk = mdoc->last;
1.43      kristaps 1290:
1.119     schwarze 1291:        if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1.1       kristaps 1292:                return(0);
1.119     schwarze 1293:        if ( ! rew_sub(MDOC_HEAD, mdoc, tok, line, ppos))
1.1       kristaps 1294:                return(0);
                   1295:
1.43      kristaps 1296:        /*
                   1297:         * Open the body scope "on-demand", that is, after we've
                   1298:         * processed all our the leading delimiters (open parenthesis,
                   1299:         * etc.).
                   1300:         */
1.1       kristaps 1301:
1.43      kristaps 1302:        for (body = NULL; ; ) {
1.32      kristaps 1303:                la = *pos;
1.119     schwarze 1304:                ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1.43      kristaps 1305:
1.53      kristaps 1306:                if (ARGS_ERROR == ac)
1.1       kristaps 1307:                        return(0);
1.53      kristaps 1308:                if (ARGS_EOLN == ac)
1.43      kristaps 1309:                        break;
1.53      kristaps 1310:                if (ARGS_PUNCT == ac)
1.1       kristaps 1311:                        break;
                   1312:
1.53      kristaps 1313:                if (NULL == body && ARGS_QWORD != ac &&
1.105     kristaps 1314:                                DELIM_OPEN == mdoc_isdelim(p)) {
1.123   ! schwarze 1315:                        if ( ! dword(mdoc, line, la, p, DELIM_OPEN, 0))
1.1       kristaps 1316:                                return(0);
                   1317:                        continue;
1.123   ! schwarze 1318:                }
1.1       kristaps 1319:
1.43      kristaps 1320:                if (NULL == body) {
1.119     schwarze 1321:                       if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.43      kristaps 1322:                               return(0);
1.119     schwarze 1323:                        body = mdoc->last;
1.43      kristaps 1324:                }
                   1325:
1.54      kristaps 1326:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1327:
                   1328:                if (MDOC_MAX == ntok) {
1.123   ! schwarze 1329:                        if ( ! dword(mdoc, line, la, p, DELIM_MAX,
        !          1330:                            MDOC_JOIN & mdoc_macros[tok].flags))
1.43      kristaps 1331:                                return(0);
1.53      kristaps 1332:                        continue;
                   1333:                }
1.43      kristaps 1334:
1.119     schwarze 1335:                if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1.1       kristaps 1336:                        return(0);
1.53      kristaps 1337:                break;
1.1       kristaps 1338:        }
                   1339:
1.43      kristaps 1340:        /* Clean-ups to leave in a consistent state. */
                   1341:
1.44      kristaps 1342:        if (NULL == body) {
1.119     schwarze 1343:                if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.44      kristaps 1344:                        return(0);
1.119     schwarze 1345:                body = mdoc->last;
1.64      kristaps 1346:        }
                   1347:
                   1348:        for (n = body->child; n && n->next; n = n->next)
                   1349:                /* Do nothing. */ ;
                   1350:
                   1351:        /*
                   1352:         * End of sentence spacing: if the last node is a text node and
                   1353:         * has a trailing period, then mark it as being end-of-sentence.
                   1354:         */
                   1355:
                   1356:        if (n && MDOC_TEXT == n->type && n->string)
1.93      schwarze 1357:                if (mandoc_eos(n->string, strlen(n->string), 1))
1.64      kristaps 1358:                        n->flags |= MDOC_EOS;
                   1359:
1.109     kristaps 1360:        /* Up-propagate the end-of-space flag. */
1.64      kristaps 1361:
                   1362:        if (n && (MDOC_EOS & n->flags)) {
                   1363:                body->flags |= MDOC_EOS;
                   1364:                body->parent->flags |= MDOC_EOS;
1.44      kristaps 1365:        }
1.43      kristaps 1366:
1.83      schwarze 1367:        /*
                   1368:         * If there is an open sub-block requiring explicit close-out,
                   1369:         * postpone closing out the current block
                   1370:         * until the rew_sub() call closing out the sub-block.
                   1371:         */
1.119     schwarze 1372:        for (n = mdoc->last; n && n != body && n != blk->parent;
                   1373:                        n = n->parent) {
1.83      schwarze 1374:                if (MDOC_BLOCK == n->type &&
                   1375:                    MDOC_EXPLICIT & mdoc_macros[n->tok].flags &&
                   1376:                    ! (MDOC_VALID & n->flags)) {
1.119     schwarze 1377:                        make_pending(n, tok, mdoc, line, ppos);
                   1378:                        if ( ! mdoc_endbody_alloc(mdoc, line, ppos,
1.83      schwarze 1379:                            tok, body, ENDBODY_NOSPACE))
                   1380:                                return(0);
                   1381:                        return(1);
                   1382:                }
                   1383:        }
                   1384:
1.32      kristaps 1385:        /*
                   1386:         * If we can't rewind to our body, then our scope has already
                   1387:         * been closed by another macro (like `Oc' closing `Op').  This
                   1388:         * is ugly behaviour nodding its head to OpenBSD's overwhelming
1.47      kristaps 1389:         * crufty use of `Op' breakage.
1.1       kristaps 1390:         */
1.103     kristaps 1391:        if (n != body)
1.119     schwarze 1392:                mandoc_vmsg(MANDOCERR_SCOPENEST, mdoc->parse, line, ppos,
1.103     kristaps 1393:                                "%s broken", mdoc_macronames[tok]);
1.43      kristaps 1394:
1.119     schwarze 1395:        if (n && ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1.32      kristaps 1396:                return(0);
1.1       kristaps 1397:
1.32      kristaps 1398:        /* Standard appending of delimiters. */
1.1       kristaps 1399:
1.119     schwarze 1400:        if (nl && ! append_delims(mdoc, line, pos, buf))
1.1       kristaps 1401:                return(0);
                   1402:
1.32      kristaps 1403:        /* Rewind scope, if applicable. */
1.1       kristaps 1404:
1.119     schwarze 1405:        if (n && ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
1.1       kristaps 1406:                return(0);
1.117     schwarze 1407:
                   1408:        /* Move trailing .Ns out of scope. */
                   1409:
                   1410:        for (n = body->child; n && n->next; n = n->next)
                   1411:                /* Do nothing. */ ;
                   1412:        if (n && MDOC_Ns == n->tok)
1.119     schwarze 1413:                mdoc_node_relink(mdoc, n);
1.1       kristaps 1414:
                   1415:        return(1);
                   1416: }
                   1417:
                   1418:
                   1419: static int
                   1420: blk_part_exp(MACRO_PROT_ARGS)
                   1421: {
1.60      kristaps 1422:        int               la, nl;
1.55      kristaps 1423:        enum margserr     ac;
1.43      kristaps 1424:        struct mdoc_node *head; /* keep track of head */
                   1425:        struct mdoc_node *body; /* keep track of body */
1.1       kristaps 1426:        char             *p;
1.53      kristaps 1427:        enum mdoct        ntok;
1.1       kristaps 1428:
1.119     schwarze 1429:        nl = MDOC_NEWLINE & mdoc->flags;
1.60      kristaps 1430:
1.43      kristaps 1431:        /*
                   1432:         * The opening of an explicit macro having zero or more leading
                   1433:         * punctuation nodes; a head with optional single element (the
                   1434:         * case of `Eo'); and a body that may be empty.
                   1435:         */
1.32      kristaps 1436:
1.119     schwarze 1437:        if ( ! mdoc_block_alloc(mdoc, line, ppos, tok, NULL))
1.1       kristaps 1438:                return(0);
1.32      kristaps 1439:
1.43      kristaps 1440:        for (head = body = NULL; ; ) {
1.32      kristaps 1441:                la = *pos;
1.119     schwarze 1442:                ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1.1       kristaps 1443:
1.53      kristaps 1444:                if (ARGS_ERROR == ac)
1.1       kristaps 1445:                        return(0);
1.53      kristaps 1446:                if (ARGS_PUNCT == ac)
1.1       kristaps 1447:                        break;
1.53      kristaps 1448:                if (ARGS_EOLN == ac)
1.1       kristaps 1449:                        break;
1.43      kristaps 1450:
                   1451:                /* Flush out leading punctuation. */
                   1452:
1.53      kristaps 1453:                if (NULL == head && ARGS_QWORD != ac &&
1.105     kristaps 1454:                                DELIM_OPEN == mdoc_isdelim(p)) {
1.43      kristaps 1455:                        assert(NULL == body);
1.123   ! schwarze 1456:                        if ( ! dword(mdoc, line, la, p, DELIM_OPEN, 0))
1.43      kristaps 1457:                                return(0);
                   1458:                        continue;
1.123   ! schwarze 1459:                }
1.43      kristaps 1460:
                   1461:                if (NULL == head) {
                   1462:                        assert(NULL == body);
1.119     schwarze 1463:                        if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1.1       kristaps 1464:                                return(0);
1.119     schwarze 1465:                        head = mdoc->last;
1.1       kristaps 1466:                }
                   1467:
1.43      kristaps 1468:                /*
                   1469:                 * `Eo' gobbles any data into the head, but most other
                   1470:                 * macros just immediately close out and begin the body.
                   1471:                 */
                   1472:
                   1473:                if (NULL == body) {
                   1474:                        assert(head);
                   1475:                        /* No check whether it's a macro! */
                   1476:                        if (MDOC_Eo == tok)
1.123   ! schwarze 1477:                                if ( ! dword(mdoc, line, la, p, DELIM_MAX, 0))
1.43      kristaps 1478:                                        return(0);
                   1479:
1.119     schwarze 1480:                        if ( ! rew_sub(MDOC_HEAD, mdoc, tok, line, ppos))
1.1       kristaps 1481:                                return(0);
1.119     schwarze 1482:                        if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.1       kristaps 1483:                                return(0);
1.119     schwarze 1484:                        body = mdoc->last;
1.43      kristaps 1485:
                   1486:                        if (MDOC_Eo == tok)
                   1487:                                continue;
1.1       kristaps 1488:                }
1.43      kristaps 1489:
                   1490:                assert(NULL != head && NULL != body);
                   1491:
1.54      kristaps 1492:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1493:
                   1494:                if (MDOC_MAX == ntok) {
1.123   ! schwarze 1495:                        if ( ! dword(mdoc, line, la, p, DELIM_MAX,
        !          1496:                            MDOC_JOIN & mdoc_macros[tok].flags))
1.43      kristaps 1497:                                return(0);
1.53      kristaps 1498:                        continue;
1.43      kristaps 1499:                }
                   1500:
1.119     schwarze 1501:                if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1.1       kristaps 1502:                        return(0);
1.53      kristaps 1503:                break;
1.1       kristaps 1504:        }
                   1505:
1.43      kristaps 1506:        /* Clean-up to leave in a consistent state. */
1.32      kristaps 1507:
1.112     schwarze 1508:        if (NULL == head)
1.119     schwarze 1509:                if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1.43      kristaps 1510:                        return(0);
                   1511:
                   1512:        if (NULL == body) {
1.119     schwarze 1513:                if ( ! rew_sub(MDOC_HEAD, mdoc, tok, line, ppos))
1.1       kristaps 1514:                        return(0);
1.119     schwarze 1515:                if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.1       kristaps 1516:                        return(0);
                   1517:        }
                   1518:
1.32      kristaps 1519:        /* Standard appending of delimiters. */
                   1520:
1.60      kristaps 1521:        if ( ! nl)
1.1       kristaps 1522:                return(1);
1.119     schwarze 1523:        return(append_delims(mdoc, line, pos, buf));
1.1       kristaps 1524: }
                   1525:
                   1526:
1.61      kristaps 1527: /* ARGSUSED */
1.1       kristaps 1528: static int
                   1529: in_line_argn(MACRO_PROT_ARGS)
                   1530: {
1.60      kristaps 1531:        int              la, flushed, j, maxargs, nl;
1.55      kristaps 1532:        enum margserr    ac;
1.56      kristaps 1533:        enum margverr    av;
1.53      kristaps 1534:        struct mdoc_arg *arg;
                   1535:        char            *p;
                   1536:        enum mdoct       ntok;
1.1       kristaps 1537:
1.119     schwarze 1538:        nl = MDOC_NEWLINE & mdoc->flags;
1.60      kristaps 1539:
1.46      kristaps 1540:        /*
                   1541:         * A line macro that has a fixed number of arguments (maxargs).
                   1542:         * Only open the scope once the first non-leading-punctuation is
                   1543:         * found (unless MDOC_IGNDELIM is noted, like in `Pf'), then
                   1544:         * keep it open until the maximum number of arguments are
                   1545:         * exhausted.
                   1546:         */
1.1       kristaps 1547:
                   1548:        switch (tok) {
                   1549:        case (MDOC_Ap):
                   1550:                /* FALLTHROUGH */
                   1551:        case (MDOC_No):
                   1552:                /* FALLTHROUGH */
                   1553:        case (MDOC_Ns):
                   1554:                /* FALLTHROUGH */
                   1555:        case (MDOC_Ux):
                   1556:                maxargs = 0;
                   1557:                break;
1.101     kristaps 1558:        case (MDOC_Bx):
                   1559:                /* FALLTHROUGH */
1.42      kristaps 1560:        case (MDOC_Xr):
                   1561:                maxargs = 2;
                   1562:                break;
1.1       kristaps 1563:        default:
                   1564:                maxargs = 1;
                   1565:                break;
                   1566:        }
                   1567:
1.46      kristaps 1568:        for (arg = NULL; ; ) {
1.32      kristaps 1569:                la = *pos;
1.119     schwarze 1570:                av = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
1.1       kristaps 1571:
1.56      kristaps 1572:                if (ARGV_WORD == av) {
1.32      kristaps 1573:                        *pos = la;
1.1       kristaps 1574:                        break;
                   1575:                }
                   1576:
1.56      kristaps 1577:                if (ARGV_EOLN == av)
1.1       kristaps 1578:                        break;
1.56      kristaps 1579:                if (ARGV_ARG == av)
1.1       kristaps 1580:                        continue;
                   1581:
                   1582:                mdoc_argv_free(arg);
                   1583:                return(0);
                   1584:        }
                   1585:
1.46      kristaps 1586:        for (flushed = j = 0; ; ) {
1.32      kristaps 1587:                la = *pos;
1.119     schwarze 1588:                ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1.1       kristaps 1589:
1.53      kristaps 1590:                if (ARGS_ERROR == ac)
1.1       kristaps 1591:                        return(0);
1.53      kristaps 1592:                if (ARGS_PUNCT == ac)
1.1       kristaps 1593:                        break;
1.53      kristaps 1594:                if (ARGS_EOLN == ac)
1.1       kristaps 1595:                        break;
                   1596:
1.46      kristaps 1597:                if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) &&
1.105     kristaps 1598:                                ARGS_QWORD != ac && 0 == j &&
                   1599:                                DELIM_OPEN == mdoc_isdelim(p)) {
1.123   ! schwarze 1600:                        if ( ! dword(mdoc, line, la, p, DELIM_OPEN, 0))
1.46      kristaps 1601:                                return(0);
                   1602:                        continue;
                   1603:                } else if (0 == j)
1.119     schwarze 1604:                       if ( ! mdoc_elem_alloc(mdoc, line, la, tok, arg))
1.46      kristaps 1605:                               return(0);
                   1606:
                   1607:                if (j == maxargs && ! flushed) {
1.119     schwarze 1608:                        if ( ! rew_elem(mdoc, tok))
1.46      kristaps 1609:                                return(0);
                   1610:                        flushed = 1;
                   1611:                }
                   1612:
1.54      kristaps 1613:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1614:
                   1615:                if (MDOC_MAX != ntok) {
1.119     schwarze 1616:                        if ( ! flushed && ! rew_elem(mdoc, tok))
1.1       kristaps 1617:                                return(0);
                   1618:                        flushed = 1;
1.119     schwarze 1619:                        if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1.1       kristaps 1620:                                return(0);
1.46      kristaps 1621:                        j++;
1.1       kristaps 1622:                        break;
                   1623:                }
                   1624:
                   1625:                if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) &&
1.53      kristaps 1626:                                ARGS_QWORD != ac &&
1.67      schwarze 1627:                                ! flushed &&
1.105     kristaps 1628:                                DELIM_NONE != mdoc_isdelim(p)) {
1.119     schwarze 1629:                        if ( ! rew_elem(mdoc, tok))
1.1       kristaps 1630:                                return(0);
                   1631:                        flushed = 1;
                   1632:                }
1.42      kristaps 1633:
1.123   ! schwarze 1634:                if ( ! dword(mdoc, line, la, p, DELIM_MAX,
        !          1635:                    MDOC_JOIN & mdoc_macros[tok].flags))
1.1       kristaps 1636:                        return(0);
1.46      kristaps 1637:                j++;
1.1       kristaps 1638:        }
                   1639:
1.119     schwarze 1640:        if (0 == j && ! mdoc_elem_alloc(mdoc, line, la, tok, arg))
1.46      kristaps 1641:               return(0);
                   1642:
                   1643:        /* Close out in a consistent state. */
1.32      kristaps 1644:
1.119     schwarze 1645:        if ( ! flushed && ! rew_elem(mdoc, tok))
1.1       kristaps 1646:                return(0);
1.60      kristaps 1647:        if ( ! nl)
1.1       kristaps 1648:                return(1);
1.119     schwarze 1649:        return(append_delims(mdoc, line, pos, buf));
1.1       kristaps 1650: }
                   1651:
                   1652:
                   1653: static int
                   1654: in_line_eoln(MACRO_PROT_ARGS)
                   1655: {
1.56      kristaps 1656:        int              la;
1.55      kristaps 1657:        enum margserr    ac;
1.56      kristaps 1658:        enum margverr    av;
1.53      kristaps 1659:        struct mdoc_arg *arg;
                   1660:        char            *p;
                   1661:        enum mdoct       ntok;
1.1       kristaps 1662:
                   1663:        assert( ! (MDOC_PARSED & mdoc_macros[tok].flags));
                   1664:
1.90      schwarze 1665:        if (tok == MDOC_Pp)
1.119     schwarze 1666:                rew_sub(MDOC_BLOCK, mdoc, MDOC_Nm, line, ppos);
1.90      schwarze 1667:
1.32      kristaps 1668:        /* Parse macro arguments. */
1.1       kristaps 1669:
1.32      kristaps 1670:        for (arg = NULL; ; ) {
1.1       kristaps 1671:                la = *pos;
1.119     schwarze 1672:                av = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
1.1       kristaps 1673:
1.56      kristaps 1674:                if (ARGV_WORD == av) {
1.1       kristaps 1675:                        *pos = la;
                   1676:                        break;
                   1677:                }
1.56      kristaps 1678:                if (ARGV_EOLN == av)
1.1       kristaps 1679:                        break;
1.56      kristaps 1680:                if (ARGV_ARG == av)
1.1       kristaps 1681:                        continue;
                   1682:
                   1683:                mdoc_argv_free(arg);
                   1684:                return(0);
                   1685:        }
                   1686:
1.32      kristaps 1687:        /* Open element scope. */
                   1688:
1.119     schwarze 1689:        if ( ! mdoc_elem_alloc(mdoc, line, ppos, tok, arg))
1.1       kristaps 1690:                return(0);
                   1691:
1.32      kristaps 1692:        /* Parse argument terms. */
1.1       kristaps 1693:
                   1694:        for (;;) {
                   1695:                la = *pos;
1.119     schwarze 1696:                ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1.1       kristaps 1697:
1.53      kristaps 1698:                if (ARGS_ERROR == ac)
1.1       kristaps 1699:                        return(0);
1.53      kristaps 1700:                if (ARGS_EOLN == ac)
1.1       kristaps 1701:                        break;
                   1702:
1.53      kristaps 1703:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1.1       kristaps 1704:
1.53      kristaps 1705:                if (MDOC_MAX == ntok) {
1.123   ! schwarze 1706:                        if ( ! dword(mdoc, line, la, p, DELIM_MAX,
        !          1707:                            MDOC_JOIN & mdoc_macros[tok].flags))
1.1       kristaps 1708:                                return(0);
1.53      kristaps 1709:                        continue;
                   1710:                }
1.1       kristaps 1711:
1.119     schwarze 1712:                if ( ! rew_elem(mdoc, tok))
1.1       kristaps 1713:                        return(0);
1.119     schwarze 1714:                return(mdoc_macro(mdoc, ntok, line, la, pos, buf));
1.1       kristaps 1715:        }
                   1716:
1.32      kristaps 1717:        /* Close out (no delimiters). */
                   1718:
1.119     schwarze 1719:        return(rew_elem(mdoc, tok));
1.1       kristaps 1720: }
                   1721:
                   1722:
                   1723: /* ARGSUSED */
                   1724: static int
1.41      kristaps 1725: ctx_synopsis(MACRO_PROT_ARGS)
                   1726: {
1.60      kristaps 1727:        int              nl;
                   1728:
1.119     schwarze 1729:        nl = MDOC_NEWLINE & mdoc->flags;
1.41      kristaps 1730:
                   1731:        /* If we're not in the SYNOPSIS, go straight to in-line. */
1.119     schwarze 1732:        if ( ! (MDOC_SYNOPSIS & mdoc->flags))
                   1733:                return(in_line(mdoc, tok, line, ppos, pos, buf));
1.41      kristaps 1734:
                   1735:        /* If we're a nested call, same place. */
1.60      kristaps 1736:        if ( ! nl)
1.119     schwarze 1737:                return(in_line(mdoc, tok, line, ppos, pos, buf));
1.41      kristaps 1738:
                   1739:        /*
                   1740:         * XXX: this will open a block scope; however, if later we end
                   1741:         * up formatting the block scope, then child nodes will inherit
                   1742:         * the formatting.  Be careful.
                   1743:         */
1.88      schwarze 1744:        if (MDOC_Nm == tok)
1.119     schwarze 1745:                return(blk_full(mdoc, tok, line, ppos, pos, buf));
1.88      schwarze 1746:        assert(MDOC_Vt == tok);
1.119     schwarze 1747:        return(blk_part_imp(mdoc, tok, line, ppos, pos, buf));
1.41      kristaps 1748: }
                   1749:
                   1750:
                   1751: /* ARGSUSED */
                   1752: static int
1.1       kristaps 1753: obsolete(MACRO_PROT_ARGS)
                   1754: {
                   1755:
1.119     schwarze 1756:        mdoc_pmsg(mdoc, line, ppos, MANDOCERR_MACROOBS);
1.103     kristaps 1757:        return(1);
1.1       kristaps 1758: }
                   1759:
                   1760:
1.24      kristaps 1761: /*
                   1762:  * Phrases occur within `Bl -column' entries, separated by `Ta' or tabs.
                   1763:  * They're unusual because they're basically free-form text until a
                   1764:  * macro is encountered.
                   1765:  */
1.1       kristaps 1766: static int
1.119     schwarze 1767: phrase(struct mdoc *mdoc, int line, int ppos, char *buf)
1.1       kristaps 1768: {
1.53      kristaps 1769:        int              la, pos;
1.75      kristaps 1770:        enum margserr    ac;
1.53      kristaps 1771:        enum mdoct       ntok;
                   1772:        char            *p;
1.1       kristaps 1773:
1.24      kristaps 1774:        for (pos = ppos; ; ) {
                   1775:                la = pos;
1.1       kristaps 1776:
1.119     schwarze 1777:                ac = mdoc_zargs(mdoc, line, &pos, buf, &p);
1.1       kristaps 1778:
1.75      kristaps 1779:                if (ARGS_ERROR == ac)
1.24      kristaps 1780:                        return(0);
1.75      kristaps 1781:                if (ARGS_EOLN == ac)
1.24      kristaps 1782:                        break;
1.1       kristaps 1783:
1.75      kristaps 1784:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup_raw(p);
1.1       kristaps 1785:
1.53      kristaps 1786:                if (MDOC_MAX == ntok) {
1.123   ! schwarze 1787:                        if ( ! dword(mdoc, line, la, p, DELIM_MAX, 1))
1.1       kristaps 1788:                                return(0);
1.53      kristaps 1789:                        continue;
                   1790:                }
1.1       kristaps 1791:
1.119     schwarze 1792:                if ( ! mdoc_macro(mdoc, ntok, line, la, &pos, buf))
1.1       kristaps 1793:                        return(0);
1.119     schwarze 1794:                return(append_delims(mdoc, line, &pos, buf));
1.1       kristaps 1795:        }
                   1796:
                   1797:        return(1);
                   1798: }
1.24      kristaps 1799:
                   1800:
1.79      kristaps 1801: /* ARGSUSED */
1.75      kristaps 1802: static int
                   1803: phrase_ta(MACRO_PROT_ARGS)
                   1804: {
1.121     schwarze 1805:        struct mdoc_node *n;
1.75      kristaps 1806:        int               la;
                   1807:        enum mdoct        ntok;
                   1808:        enum margserr     ac;
                   1809:        char             *p;
                   1810:
1.121     schwarze 1811:        /* Make sure we are in a column list or ignore this macro. */
                   1812:        n = mdoc->last;
                   1813:        while (NULL != n && MDOC_Bl != n->tok)
                   1814:                n = n->parent;
                   1815:        if (NULL == n || LIST_column != n->norm->Bl.type) {
                   1816:                mdoc_pmsg(mdoc, line, ppos, MANDOCERR_STRAYTA);
                   1817:                return(1);
                   1818:        }
1.75      kristaps 1819:
1.121     schwarze 1820:        /* Advance to the next column. */
1.119     schwarze 1821:        if ( ! rew_sub(MDOC_BODY, mdoc, MDOC_It, line, ppos))
1.75      kristaps 1822:                return(0);
1.119     schwarze 1823:        if ( ! mdoc_body_alloc(mdoc, line, ppos, MDOC_It))
1.75      kristaps 1824:                return(0);
                   1825:
                   1826:        for (;;) {
                   1827:                la = *pos;
1.119     schwarze 1828:                ac = mdoc_zargs(mdoc, line, pos, buf, &p);
1.75      kristaps 1829:
                   1830:                if (ARGS_ERROR == ac)
                   1831:                        return(0);
                   1832:                if (ARGS_EOLN == ac)
                   1833:                        break;
                   1834:
                   1835:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup_raw(p);
                   1836:
                   1837:                if (MDOC_MAX == ntok) {
1.123   ! schwarze 1838:                        if ( ! dword(mdoc, line, la, p, DELIM_MAX,
        !          1839:                            MDOC_JOIN & mdoc_macros[tok].flags))
1.75      kristaps 1840:                                return(0);
                   1841:                        continue;
                   1842:                }
                   1843:
1.119     schwarze 1844:                if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1.75      kristaps 1845:                        return(0);
1.119     schwarze 1846:                return(append_delims(mdoc, line, pos, buf));
1.75      kristaps 1847:        }
                   1848:
                   1849:        return(1);
                   1850: }

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