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Annotation of mandoc/mdoc_macro.c, Revision 1.145

1.145   ! schwarze    1: /*     $Id: mdoc_macro.c,v 1.144 2014/11/17 06:44:58 schwarze Exp $ */
1.1       kristaps    2: /*
1.116     schwarze    3:  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
1.143     schwarze    4:  * Copyright (c) 2010, 2012, 2013, 2014 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: #include "config.h"
1.140     schwarze   19:
                     20: #include <sys/types.h>
1.40      kristaps   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:
1.131     schwarze   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             phrase_ta(MACRO_PROT_ARGS);
1.53      kristaps   52:
1.123     schwarze   53: static int             dword(struct mdoc *, int, int, const char *,
                     54:                                 enum mdelim, int);
1.131     schwarze   55: static int             append_delims(struct mdoc *,
1.53      kristaps   56:                                int, int *, char *);
1.58      kristaps   57: static enum mdoct      lookup(enum mdoct, const char *);
1.53      kristaps   58: static enum mdoct      lookup_raw(const char *);
1.85      schwarze   59: static int             make_pending(struct mdoc_node *, enum mdoct,
1.83      schwarze   60:                                struct mdoc *, int, int);
1.131     schwarze   61: static int             phrase(struct mdoc *, int, int, char *);
                     62: static enum mdoct      rew_alt(enum mdoct);
                     63: static enum rew        rew_dohalt(enum mdoct, enum mdoc_type,
1.53      kristaps   64:                                const struct mdoc_node *);
1.131     schwarze   65: static int             rew_elem(struct mdoc *, enum mdoct);
                     66: static int             rew_last(struct mdoc *,
1.53      kristaps   67:                                const struct mdoc_node *);
1.131     schwarze   68: static int             rew_sub(enum mdoc_type, struct mdoc *,
1.53      kristaps   69:                                enum mdoct, int, int);
1.1       kristaps   70:
                     71: const  struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
1.123     schwarze   72:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ap */
1.1       kristaps   73:        { in_line_eoln, MDOC_PROLOGUE }, /* Dd */
                     74:        { in_line_eoln, MDOC_PROLOGUE }, /* Dt */
                     75:        { in_line_eoln, MDOC_PROLOGUE }, /* Os */
1.123     schwarze   76:        { blk_full, MDOC_PARSED | MDOC_JOIN }, /* Sh */
                     77:        { blk_full, MDOC_PARSED | MDOC_JOIN }, /* Ss */
                     78:        { in_line_eoln, 0 }, /* Pp */
                     79:        { blk_part_imp, MDOC_PARSED | MDOC_JOIN }, /* D1 */
                     80:        { blk_part_imp, MDOC_PARSED | MDOC_JOIN }, /* Dl */
1.1       kristaps   81:        { blk_full, MDOC_EXPLICIT }, /* Bd */
1.123     schwarze   82:        { blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Ed */
1.1       kristaps   83:        { blk_full, MDOC_EXPLICIT }, /* Bl */
1.123     schwarze   84:        { blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* El */
                     85:        { blk_full, MDOC_PARSED | MDOC_JOIN }, /* It */
                     86:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ad */
                     87:        { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* An */
1.1       kristaps   88:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ar */
1.129     schwarze   89:        { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Cd */
1.1       kristaps   90:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cm */
1.123     schwarze   91:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Dv */
                     92:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Er */
                     93:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ev */
1.1       kristaps   94:        { in_line_eoln, 0 }, /* Ex */
1.123     schwarze   95:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fa */
                     96:        { in_line_eoln, 0 }, /* Fd */
1.1       kristaps   97:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fl */
1.123     schwarze   98:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fn */
                     99:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ft */
1.128     schwarze  100:        { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ic */
1.18      kristaps  101:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* In */
1.123     schwarze  102:        { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Li */
                    103:        { blk_full, MDOC_JOIN }, /* Nd */
                    104:        { ctx_synopsis, MDOC_CALLABLE | MDOC_PARSED }, /* Nm */
1.1       kristaps  105:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Op */
1.132     schwarze  106:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ot */
1.1       kristaps  107:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Pa */
                    108:        { in_line_eoln, 0 }, /* Rv */
1.123     schwarze  109:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* St */
1.1       kristaps  110:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Va */
1.123     schwarze  111:        { ctx_synopsis, MDOC_CALLABLE | MDOC_PARSED }, /* Vt */
1.42      kristaps  112:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Xr */
1.123     schwarze  113:        { in_line_eoln, MDOC_JOIN }, /* %A */
                    114:        { in_line_eoln, MDOC_JOIN }, /* %B */
                    115:        { in_line_eoln, MDOC_JOIN }, /* %D */
                    116:        { in_line_eoln, MDOC_JOIN }, /* %I */
                    117:        { in_line_eoln, MDOC_JOIN }, /* %J */
1.1       kristaps  118:        { in_line_eoln, 0 }, /* %N */
1.123     schwarze  119:        { in_line_eoln, MDOC_JOIN }, /* %O */
1.1       kristaps  120:        { in_line_eoln, 0 }, /* %P */
1.123     schwarze  121:        { in_line_eoln, MDOC_JOIN }, /* %R */
                    122:        { in_line_eoln, MDOC_JOIN }, /* %T */
1.1       kristaps  123:        { in_line_eoln, 0 }, /* %V */
1.123     schwarze  124:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
                    125:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Ac */
                    126:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
                    127:                        MDOC_EXPLICIT | MDOC_JOIN }, /* Ao */
                    128:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Aq */
1.1       kristaps  129:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* At */
1.123     schwarze  130:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
                    131:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Bc */
                    132:        { blk_full, MDOC_EXPLICIT }, /* Bf */
                    133:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
                    134:                        MDOC_EXPLICIT | MDOC_JOIN }, /* Bo */
                    135:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Bq */
1.1       kristaps  136:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bsx */
                    137:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bx */
                    138:        { in_line_eoln, 0 }, /* Db */
1.123     schwarze  139:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
                    140:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Dc */
                    141:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
                    142:                        MDOC_EXPLICIT | MDOC_JOIN }, /* Do */
                    143:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Dq */
                    144:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Ec */
                    145:        { blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Ef */
                    146:        { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Em */
1.1       kristaps  147:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Eo */
                    148:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Fx */
1.11      kristaps  149:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ms */
1.144     schwarze  150:        { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* No */
1.123     schwarze  151:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED |
                    152:                        MDOC_IGNDELIM | MDOC_JOIN }, /* Ns */
1.1       kristaps  153:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Nx */
                    154:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ox */
1.123     schwarze  155:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
                    156:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Pc */
1.52      kristaps  157:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_IGNDELIM }, /* Pf */
1.123     schwarze  158:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
                    159:                        MDOC_EXPLICIT | MDOC_JOIN }, /* Po */
                    160:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Pq */
                    161:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
                    162:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Qc */
                    163:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ql */
                    164:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
                    165:                        MDOC_EXPLICIT | MDOC_JOIN }, /* Qo */
                    166:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Qq */
                    167:        { blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Re */
1.1       kristaps  168:        { blk_full, MDOC_EXPLICIT }, /* Rs */
1.123     schwarze  169:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
                    170:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Sc */
                    171:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
                    172:                        MDOC_EXPLICIT | MDOC_JOIN }, /* So */
                    173:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Sq */
1.1       kristaps  174:        { in_line_eoln, 0 }, /* Sm */
1.123     schwarze  175:        { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Sx */
                    176:        { in_line, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Sy */
1.1       kristaps  177:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Tn */
1.123     schwarze  178:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ux */
1.1       kristaps  179:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Xc */
                    180:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Xo */
1.123     schwarze  181:        { blk_full, MDOC_EXPLICIT | MDOC_CALLABLE }, /* Fo */
                    182:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
                    183:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Fc */
                    184:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
                    185:                        MDOC_EXPLICIT | MDOC_JOIN }, /* Oo */
                    186:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
                    187:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Oc */
1.1       kristaps  188:        { blk_full, MDOC_EXPLICIT }, /* Bk */
1.123     schwarze  189:        { blk_exp_close, MDOC_EXPLICIT | MDOC_JOIN }, /* Ek */
1.1       kristaps  190:        { in_line_eoln, 0 }, /* Bt */
                    191:        { in_line_eoln, 0 }, /* Hf */
1.132     schwarze  192:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fr */
1.1       kristaps  193:        { in_line_eoln, 0 }, /* Ud */
1.69      kristaps  194:        { in_line, 0 }, /* Lb */
1.123     schwarze  195:        { in_line_eoln, 0 }, /* Lp */
                    196:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Lk */
                    197:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Mt */
                    198:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Brq */
                    199:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED |
                    200:                        MDOC_EXPLICIT | MDOC_JOIN }, /* Bro */
                    201:        { blk_exp_close, MDOC_CALLABLE | MDOC_PARSED |
                    202:                         MDOC_EXPLICIT | MDOC_JOIN }, /* Brc */
                    203:        { in_line_eoln, MDOC_JOIN }, /* %C */
1.132     schwarze  204:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Es */
                    205:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* En */
1.1       kristaps  206:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Dx */
1.123     schwarze  207:        { in_line_eoln, MDOC_JOIN }, /* %Q */
1.20      kristaps  208:        { in_line_eoln, 0 }, /* br */
                    209:        { in_line_eoln, 0 }, /* sp */
1.37      kristaps  210:        { in_line_eoln, 0 }, /* %U */
1.123     schwarze  211:        { phrase_ta, MDOC_CALLABLE | MDOC_PARSED | MDOC_JOIN }, /* Ta */
1.143     schwarze  212:        { in_line_eoln, MDOC_PROLOGUE }, /* ll */
1.1       kristaps  213: };
                    214:
                    215: const  struct mdoc_macro * const mdoc_macros = __mdoc_macros;
                    216:
                    217:
                    218: /*
                    219:  * This is called at the end of parsing.  It must traverse up the tree,
                    220:  * closing out open [implicit] scopes.  Obviously, open explicit scopes
                    221:  * are errors.
                    222:  */
                    223: int
1.119     schwarze  224: mdoc_macroend(struct mdoc *mdoc)
1.1       kristaps  225: {
                    226:        struct mdoc_node *n;
                    227:
                    228:        /* Scan for open explicit scopes. */
                    229:
1.119     schwarze  230:        n = MDOC_VALID & mdoc->last->flags ?
1.131     schwarze  231:            mdoc->last->parent : mdoc->last;
1.1       kristaps  232:
1.94      schwarze  233:        for ( ; n; n = n->parent)
                    234:                if (MDOC_BLOCK == n->type &&
                    235:                    MDOC_EXPLICIT & mdoc_macros[n->tok].flags)
1.137     schwarze  236:                        mandoc_msg(MANDOCERR_BLK_NOEND, mdoc->parse,
                    237:                            n->line, n->pos, mdoc_macronames[n->tok]);
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:  * Look up a macro from within a subsequent context.
                    246:  */
1.53      kristaps  247: static enum mdoct
1.58      kristaps  248: lookup(enum mdoct from, const char *p)
1.28      kristaps  249: {
                    250:
                    251:        if ( ! (MDOC_PARSED & mdoc_macros[from].flags))
                    252:                return(MDOC_MAX);
1.35      kristaps  253:        return(lookup_raw(p));
1.28      kristaps  254: }
                    255:
1.32      kristaps  256: /*
                    257:  * Lookup a macro following the initial line macro.
                    258:  */
1.53      kristaps  259: static enum mdoct
1.35      kristaps  260: lookup_raw(const char *p)
1.1       kristaps  261: {
1.58      kristaps  262:        enum mdoct       res;
1.1       kristaps  263:
1.34      kristaps  264:        if (MDOC_MAX == (res = mdoc_hash_find(p)))
1.28      kristaps  265:                return(MDOC_MAX);
                    266:        if (MDOC_CALLABLE & mdoc_macros[res].flags)
1.1       kristaps  267:                return(res);
                    268:        return(MDOC_MAX);
                    269: }
                    270:
                    271: static int
1.32      kristaps  272: rew_last(struct mdoc *mdoc, const struct mdoc_node *to)
1.1       kristaps  273: {
1.100     kristaps  274:        struct mdoc_node *n, *np;
1.1       kristaps  275:
                    276:        assert(to);
                    277:        mdoc->next = MDOC_NEXT_SIBLING;
                    278:
1.131     schwarze  279:
1.1       kristaps  280:        while (mdoc->last != to) {
1.100     kristaps  281:                /*
                    282:                 * Save the parent here, because we may delete the
1.119     schwarze  283:                 * mdoc->last node in the post-validation phase and reset
                    284:                 * it to mdoc->last->parent, causing a step in the closing
1.100     kristaps  285:                 * out to be lost.
                    286:                 */
                    287:                np = mdoc->last->parent;
1.1       kristaps  288:                if ( ! mdoc_valid_post(mdoc))
                    289:                        return(0);
1.99      kristaps  290:                n = mdoc->last;
1.100     kristaps  291:                mdoc->last = np;
1.1       kristaps  292:                assert(mdoc->last);
1.99      kristaps  293:                mdoc->last->last = n;
1.1       kristaps  294:        }
                    295:
1.97      kristaps  296:        return(mdoc_valid_post(mdoc));
1.1       kristaps  297: }
                    298:
1.32      kristaps  299: /*
1.84      schwarze  300:  * For a block closing macro, return the corresponding opening one.
                    301:  * Otherwise, return the macro itself.
1.32      kristaps  302:  */
1.47      kristaps  303: static enum mdoct
                    304: rew_alt(enum mdoct tok)
1.1       kristaps  305: {
                    306:        switch (tok) {
1.131     schwarze  307:        case MDOC_Ac:
1.1       kristaps  308:                return(MDOC_Ao);
1.131     schwarze  309:        case MDOC_Bc:
1.1       kristaps  310:                return(MDOC_Bo);
1.131     schwarze  311:        case MDOC_Brc:
1.1       kristaps  312:                return(MDOC_Bro);
1.131     schwarze  313:        case MDOC_Dc:
1.1       kristaps  314:                return(MDOC_Do);
1.131     schwarze  315:        case MDOC_Ec:
1.1       kristaps  316:                return(MDOC_Eo);
1.131     schwarze  317:        case MDOC_Ed:
1.1       kristaps  318:                return(MDOC_Bd);
1.131     schwarze  319:        case MDOC_Ef:
1.1       kristaps  320:                return(MDOC_Bf);
1.131     schwarze  321:        case MDOC_Ek:
1.1       kristaps  322:                return(MDOC_Bk);
1.131     schwarze  323:        case MDOC_El:
1.1       kristaps  324:                return(MDOC_Bl);
1.131     schwarze  325:        case MDOC_Fc:
1.1       kristaps  326:                return(MDOC_Fo);
1.131     schwarze  327:        case MDOC_Oc:
1.1       kristaps  328:                return(MDOC_Oo);
1.131     schwarze  329:        case MDOC_Pc:
1.1       kristaps  330:                return(MDOC_Po);
1.131     schwarze  331:        case MDOC_Qc:
1.1       kristaps  332:                return(MDOC_Qo);
1.131     schwarze  333:        case MDOC_Re:
1.1       kristaps  334:                return(MDOC_Rs);
1.131     schwarze  335:        case MDOC_Sc:
1.1       kristaps  336:                return(MDOC_So);
1.131     schwarze  337:        case MDOC_Xc:
1.1       kristaps  338:                return(MDOC_Xo);
                    339:        default:
1.84      schwarze  340:                return(tok);
1.1       kristaps  341:        }
                    342:        /* NOTREACHED */
                    343: }
                    344:
1.84      schwarze  345: /*
                    346:  * Rewinding to tok, how do we have to handle *p?
                    347:  * REWIND_NONE: *p would delimit tok, but no tok scope is open
                    348:  *   inside *p, so there is no need to rewind anything at all.
                    349:  * REWIND_THIS: *p matches tok, so rewind *p and nothing else.
                    350:  * REWIND_MORE: *p is implicit, rewind it and keep searching for tok.
1.98      kristaps  351:  * REWIND_FORCE: *p is explicit, but tok is full, force rewinding *p.
1.84      schwarze  352:  * REWIND_LATER: *p is explicit and still open, postpone rewinding.
                    353:  * REWIND_ERROR: No tok block is open at all.
1.1       kristaps  354:  */
1.51      kristaps  355: static enum rew
1.131     schwarze  356: rew_dohalt(enum mdoct tok, enum mdoc_type type,
1.47      kristaps  357:                const struct mdoc_node *p)
1.1       kristaps  358: {
                    359:
1.86      schwarze  360:        /*
                    361:         * No matching token, no delimiting block, no broken block.
                    362:         * This can happen when full implicit macros are called for
                    363:         * the first time but try to rewind their previous
                    364:         * instance anyway.
                    365:         */
1.1       kristaps  366:        if (MDOC_ROOT == p->type)
1.84      schwarze  367:                return(MDOC_BLOCK == type &&
                    368:                    MDOC_EXPLICIT & mdoc_macros[tok].flags ?
                    369:                    REWIND_ERROR : REWIND_NONE);
1.86      schwarze  370:
                    371:        /*
1.131     schwarze  372:         * When starting to rewind, skip plain text
1.86      schwarze  373:         * and nodes that have already been rewound.
                    374:         */
1.84      schwarze  375:        if (MDOC_TEXT == p->type || MDOC_VALID & p->flags)
                    376:                return(REWIND_MORE);
                    377:
1.86      schwarze  378:        /*
                    379:         * The easiest case:  Found a matching token.
                    380:         * This applies to both blocks and elements.
                    381:         */
1.84      schwarze  382:        tok = rew_alt(tok);
                    383:        if (tok == p->tok)
                    384:                return(p->end ? REWIND_NONE :
                    385:                    type == p->type ? REWIND_THIS : REWIND_MORE);
                    386:
1.86      schwarze  387:        /*
                    388:         * While elements do require rewinding for themselves,
                    389:         * they never affect rewinding of other nodes.
                    390:         */
1.84      schwarze  391:        if (MDOC_ELEM == p->type)
                    392:                return(REWIND_MORE);
1.1       kristaps  393:
1.86      schwarze  394:        /*
                    395:         * Blocks delimited by our target token get REWIND_MORE.
1.131     schwarze  396:         * Blocks delimiting our target token get REWIND_NONE.
1.86      schwarze  397:         */
1.1       kristaps  398:        switch (tok) {
1.131     schwarze  399:        case MDOC_Bl:
1.84      schwarze  400:                if (MDOC_It == p->tok)
                    401:                        return(REWIND_MORE);
1.1       kristaps  402:                break;
1.131     schwarze  403:        case MDOC_It:
1.1       kristaps  404:                if (MDOC_BODY == p->type && MDOC_Bl == p->tok)
1.84      schwarze  405:                        return(REWIND_NONE);
1.1       kristaps  406:                break;
1.84      schwarze  407:        /*
                    408:         * XXX Badly nested block handling still fails badly
                    409:         * when one block is breaking two blocks of the same type.
                    410:         * This is an incomplete and extremely ugly workaround,
                    411:         * required to let the OpenBSD tree build.
                    412:         */
1.131     schwarze  413:        case MDOC_Oo:
1.84      schwarze  414:                if (MDOC_Op == p->tok)
                    415:                        return(REWIND_MORE);
1.1       kristaps  416:                break;
1.131     schwarze  417:        case MDOC_Nm:
1.88      schwarze  418:                return(REWIND_NONE);
1.131     schwarze  419:        case MDOC_Nd:
1.19      kristaps  420:                /* FALLTHROUGH */
1.131     schwarze  421:        case MDOC_Ss:
1.1       kristaps  422:                if (MDOC_BODY == p->type && MDOC_Sh == p->tok)
1.84      schwarze  423:                        return(REWIND_NONE);
1.1       kristaps  424:                /* FALLTHROUGH */
1.131     schwarze  425:        case MDOC_Sh:
1.138     schwarze  426:                if (MDOC_ROOT == p->parent->type)
                    427:                        return(REWIND_THIS);
1.84      schwarze  428:                if (MDOC_Nd == p->tok || MDOC_Ss == p->tok ||
                    429:                    MDOC_Sh == p->tok)
                    430:                        return(REWIND_MORE);
1.1       kristaps  431:                break;
                    432:        default:
                    433:                break;
                    434:        }
                    435:
1.86      schwarze  436:        /*
                    437:         * Default block rewinding rules.
1.88      schwarze  438:         * In particular, always skip block end markers,
                    439:         * and let all blocks rewind Nm children.
1.86      schwarze  440:         */
1.88      schwarze  441:        if (ENDBODY_NOT != p->end || MDOC_Nm == p->tok ||
                    442:            (MDOC_BLOCK == p->type &&
1.86      schwarze  443:            ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)))
                    444:                return(REWIND_MORE);
                    445:
                    446:        /*
1.98      kristaps  447:         * By default, closing out full blocks
                    448:         * forces closing of broken explicit blocks,
                    449:         * while closing out partial blocks
                    450:         * allows delayed rewinding by default.
1.86      schwarze  451:         */
1.98      kristaps  452:        return (&blk_full == mdoc_macros[tok].fp ?
                    453:            REWIND_FORCE : REWIND_LATER);
1.1       kristaps  454: }
                    455:
                    456: static int
1.47      kristaps  457: rew_elem(struct mdoc *mdoc, enum mdoct tok)
1.1       kristaps  458: {
                    459:        struct mdoc_node *n;
                    460:
                    461:        n = mdoc->last;
                    462:        if (MDOC_ELEM != n->type)
                    463:                n = n->parent;
                    464:        assert(MDOC_ELEM == n->type);
                    465:        assert(tok == n->tok);
                    466:
                    467:        return(rew_last(mdoc, n));
                    468: }
                    469:
1.83      schwarze  470: /*
                    471:  * We are trying to close a block identified by tok,
                    472:  * but the child block *broken is still open.
                    473:  * Thus, postpone closing the tok block
                    474:  * until the rew_sub call closing *broken.
                    475:  */
                    476: static int
                    477: make_pending(struct mdoc_node *broken, enum mdoct tok,
1.119     schwarze  478:                struct mdoc *mdoc, int line, int ppos)
1.83      schwarze  479: {
                    480:        struct mdoc_node *breaker;
                    481:
                    482:        /*
                    483:         * Iterate backwards, searching for the block matching tok,
                    484:         * that is, the block breaking the *broken block.
                    485:         */
                    486:        for (breaker = broken->parent; breaker; breaker = breaker->parent) {
                    487:
                    488:                /*
                    489:                 * If the *broken block had already been broken before
                    490:                 * and we encounter its breaker, make the tok block
                    491:                 * pending on the inner breaker.
                    492:                 * Graphically, "[A breaker=[B broken=[C->B B] tok=A] C]"
                    493:                 * becomes "[A broken=[B [C->B B] tok=A] C]"
                    494:                 * and finally "[A [B->A [C->B B] A] C]".
                    495:                 */
                    496:                if (breaker == broken->pending) {
                    497:                        broken = breaker;
                    498:                        continue;
                    499:                }
                    500:
1.84      schwarze  501:                if (REWIND_THIS != rew_dohalt(tok, MDOC_BLOCK, breaker))
1.83      schwarze  502:                        continue;
                    503:                if (MDOC_BODY == broken->type)
                    504:                        broken = broken->parent;
                    505:
                    506:                /*
                    507:                 * Found the breaker.
                    508:                 * If another, outer breaker is already pending on
                    509:                 * the *broken block, we must not clobber the link
                    510:                 * to the outer breaker, but make it pending on the
                    511:                 * new, now inner breaker.
                    512:                 * Graphically, "[A breaker=[B broken=[C->A A] tok=B] C]"
                    513:                 * becomes "[A breaker=[B->A broken=[C A] tok=B] C]"
                    514:                 * and finally "[A [B->A [C->B A] B] C]".
                    515:                 */
                    516:                if (broken->pending) {
                    517:                        struct mdoc_node *taker;
                    518:
                    519:                        /*
                    520:                         * If the breaker had also been broken before,
                    521:                         * it cannot take on the outer breaker itself,
                    522:                         * but must hand it on to its own breakers.
                    523:                         * Graphically, this is the following situation:
                    524:                         * "[A [B breaker=[C->B B] broken=[D->A A] tok=C] D]"
                    525:                         * "[A taker=[B->A breaker=[C->B B] [D->C A] C] D]"
                    526:                         */
                    527:                        taker = breaker;
                    528:                        while (taker->pending)
                    529:                                taker = taker->pending;
                    530:                        taker->pending = broken->pending;
                    531:                }
                    532:                broken->pending = breaker;
1.137     schwarze  533:                mandoc_vmsg(MANDOCERR_BLK_NEST, mdoc->parse, line, ppos,
1.131     schwarze  534:                    "%s breaks %s", mdoc_macronames[tok],
                    535:                    mdoc_macronames[broken->tok]);
1.83      schwarze  536:                return(1);
                    537:        }
                    538:
                    539:        /*
                    540:         * Found no matching block for tok.
                    541:         * Are you trying to close a block that is not open?
                    542:         */
                    543:        return(0);
                    544: }
                    545:
1.1       kristaps  546: static int
1.131     schwarze  547: rew_sub(enum mdoc_type t, struct mdoc *mdoc,
1.47      kristaps  548:                enum mdoct tok, int line, int ppos)
1.1       kristaps  549: {
                    550:        struct mdoc_node *n;
                    551:
1.119     schwarze  552:        n = mdoc->last;
1.84      schwarze  553:        while (n) {
                    554:                switch (rew_dohalt(tok, t, n)) {
1.131     schwarze  555:                case REWIND_NONE:
1.84      schwarze  556:                        return(1);
1.131     schwarze  557:                case REWIND_THIS:
1.124     schwarze  558:                        n->lastline = line -
                    559:                            (MDOC_NEWLINE & mdoc->flags &&
                    560:                             ! (MDOC_EXPLICIT & mdoc_macros[tok].flags));
1.84      schwarze  561:                        break;
1.131     schwarze  562:                case REWIND_FORCE:
1.137     schwarze  563:                        mandoc_vmsg(MANDOCERR_BLK_BROKEN, mdoc->parse,
1.131     schwarze  564:                            line, ppos, "%s breaks %s",
                    565:                            mdoc_macronames[tok],
                    566:                            mdoc_macronames[n->tok]);
1.98      kristaps  567:                        /* FALLTHROUGH */
1.131     schwarze  568:                case REWIND_MORE:
1.124     schwarze  569:                        n->lastline = line -
                    570:                            (MDOC_NEWLINE & mdoc->flags ? 1 : 0);
1.84      schwarze  571:                        n = n->parent;
                    572:                        continue;
1.131     schwarze  573:                case REWIND_LATER:
1.119     schwarze  574:                        if (make_pending(n, tok, mdoc, line, ppos) ||
1.98      kristaps  575:                            MDOC_BLOCK != t)
                    576:                                return(1);
                    577:                        /* FALLTHROUGH */
1.131     schwarze  578:                case REWIND_ERROR:
1.137     schwarze  579:                        mandoc_msg(MANDOCERR_BLK_NOTOPEN,
                    580:                            mdoc->parse, line, ppos,
                    581:                            mdoc_macronames[tok]);
1.98      kristaps  582:                        return(1);
1.32      kristaps  583:                }
1.84      schwarze  584:                break;
1.1       kristaps  585:        }
                    586:
                    587:        assert(n);
1.119     schwarze  588:        if ( ! rew_last(mdoc, n))
1.47      kristaps  589:                return(0);
                    590:
                    591:        /*
1.83      schwarze  592:         * The current block extends an enclosing block.
                    593:         * Now that the current block ends, close the enclosing block, too.
1.47      kristaps  594:         */
1.83      schwarze  595:        while (NULL != (n = n->pending)) {
1.119     schwarze  596:                if ( ! rew_last(mdoc, n))
1.47      kristaps  597:                        return(0);
1.83      schwarze  598:                if (MDOC_HEAD == n->type &&
1.119     schwarze  599:                    ! mdoc_body_alloc(mdoc, n->line, n->pos, n->tok))
1.47      kristaps  600:                        return(0);
                    601:        }
                    602:
                    603:        return(1);
1.1       kristaps  604: }
                    605:
1.105     kristaps  606: /*
                    607:  * Allocate a word and check whether it's punctuation or not.
                    608:  * Punctuation consists of those tokens found in mdoc_isdelim().
                    609:  */
                    610: static int
1.123     schwarze  611: dword(struct mdoc *mdoc, int line, int col, const char *p,
                    612:                enum mdelim d, int may_append)
1.105     kristaps  613: {
1.131     schwarze  614:
1.105     kristaps  615:        if (DELIM_MAX == d)
                    616:                d = mdoc_isdelim(p);
                    617:
1.123     schwarze  618:        if (may_append &&
                    619:            ! ((MDOC_SYNOPSIS | MDOC_KEEP | MDOC_SMOFF) & mdoc->flags) &&
                    620:            DELIM_NONE == d && MDOC_TEXT == mdoc->last->type &&
                    621:            DELIM_NONE == mdoc_isdelim(mdoc->last->string)) {
                    622:                mdoc_word_append(mdoc, p);
                    623:                return(1);
                    624:        }
                    625:
1.119     schwarze  626:        if ( ! mdoc_word_alloc(mdoc, line, col, p))
1.105     kristaps  627:                return(0);
                    628:
1.108     schwarze  629:        /*
1.144     schwarze  630:         * If the word consists of a bare delimiter,
                    631:         * flag the new node accordingly,
                    632:         * unless doing so was vetoed by the invoking macro.
                    633:         * Always clear the veto, it is only valid for one word.
1.108     schwarze  634:         */
                    635:
1.144     schwarze  636:        if (d == DELIM_OPEN)
                    637:                mdoc->last->flags |= MDOC_DELIMO;
                    638:        else if (d == DELIM_CLOSE &&
                    639:            ! (mdoc->flags & MDOC_NODELIMC) &&
1.131     schwarze  640:            mdoc->last->parent->tok != MDOC_Fd)
1.119     schwarze  641:                mdoc->last->flags |= MDOC_DELIMC;
1.105     kristaps  642:
1.144     schwarze  643:        mdoc->flags &= ~MDOC_NODELIMC;
                    644:
1.105     kristaps  645:        return(1);
                    646: }
1.1       kristaps  647:
                    648: static int
1.119     schwarze  649: append_delims(struct mdoc *mdoc, int line, int *pos, char *buf)
1.1       kristaps  650: {
1.66      kristaps  651:        int              la;
1.55      kristaps  652:        enum margserr    ac;
1.1       kristaps  653:        char            *p;
                    654:
1.66      kristaps  655:        if ('\0' == buf[*pos])
1.1       kristaps  656:                return(1);
                    657:
                    658:        for (;;) {
1.66      kristaps  659:                la = *pos;
1.119     schwarze  660:                ac = mdoc_zargs(mdoc, line, pos, buf, &p);
1.1       kristaps  661:
1.53      kristaps  662:                if (ARGS_ERROR == ac)
1.1       kristaps  663:                        return(0);
1.53      kristaps  664:                else if (ARGS_EOLN == ac)
1.1       kristaps  665:                        break;
1.66      kristaps  666:
1.123     schwarze  667:                dword(mdoc, line, la, p, DELIM_MAX, 1);
1.66      kristaps  668:
                    669:                /*
                    670:                 * If we encounter end-of-sentence symbols, then trigger
                    671:                 * the double-space.
                    672:                 *
1.109     kristaps  673:                 * XXX: it's easy to allow this to propagate outward to
1.66      kristaps  674:                 * the last symbol, such that `. )' will cause the
                    675:                 * correct double-spacing.  However, (1) groff isn't
                    676:                 * smart enough to do this and (2) it would require
                    677:                 * knowing which symbols break this behaviour, for
1.109     kristaps  678:                 * example, `.  ;' shouldn't propagate the double-space.
1.66      kristaps  679:                 */
1.127     schwarze  680:                if (mandoc_eos(p, strlen(p)))
1.119     schwarze  681:                        mdoc->last->flags |= MDOC_EOS;
1.1       kristaps  682:        }
                    683:
                    684:        return(1);
                    685: }
                    686:
                    687: /*
1.131     schwarze  688:  * Close out block partial/full explicit.
1.1       kristaps  689:  */
                    690: static int
                    691: blk_exp_close(MACRO_PROT_ARGS)
                    692: {
1.83      schwarze  693:        struct mdoc_node *body;         /* Our own body. */
                    694:        struct mdoc_node *later;        /* A sub-block starting later. */
                    695:        struct mdoc_node *n;            /* For searching backwards. */
                    696:
1.131     schwarze  697:        int              j, lastarg, maxargs, flushed, nl;
1.55      kristaps  698:        enum margserr    ac;
1.83      schwarze  699:        enum mdoct       atok, ntok;
1.1       kristaps  700:        char            *p;
                    701:
1.119     schwarze  702:        nl = MDOC_NEWLINE & mdoc->flags;
1.60      kristaps  703:
1.1       kristaps  704:        switch (tok) {
1.131     schwarze  705:        case MDOC_Ec:
1.1       kristaps  706:                maxargs = 1;
                    707:                break;
1.131     schwarze  708:        case MDOC_Ek:
1.125     schwarze  709:                mdoc->flags &= ~MDOC_KEEP;
1.1       kristaps  710:        default:
                    711:                maxargs = 0;
                    712:                break;
                    713:        }
                    714:
1.83      schwarze  715:        /*
                    716:         * Search backwards for beginnings of blocks,
                    717:         * both of our own and of pending sub-blocks.
                    718:         */
                    719:        atok = rew_alt(tok);
                    720:        body = later = NULL;
1.119     schwarze  721:        for (n = mdoc->last; n; n = n->parent) {
1.83      schwarze  722:                if (MDOC_VALID & n->flags)
                    723:                        continue;
                    724:
                    725:                /* Remember the start of our own body. */
                    726:                if (MDOC_BODY == n->type && atok == n->tok) {
1.87      kristaps  727:                        if (ENDBODY_NOT == n->end)
1.83      schwarze  728:                                body = n;
                    729:                        continue;
                    730:                }
                    731:
1.88      schwarze  732:                if (MDOC_BLOCK != n->type || MDOC_Nm == n->tok)
1.83      schwarze  733:                        continue;
                    734:                if (atok == n->tok) {
                    735:                        assert(body);
                    736:
                    737:                        /*
                    738:                         * Found the start of our own block.
                    739:                         * When there is no pending sub block,
                    740:                         * just proceed to closing out.
                    741:                         */
                    742:                        if (NULL == later)
                    743:                                break;
                    744:
1.131     schwarze  745:                        /*
1.83      schwarze  746:                         * When there is a pending sub block,
                    747:                         * postpone closing out the current block
                    748:                         * until the rew_sub() closing out the sub-block.
                    749:                         */
1.119     schwarze  750:                        make_pending(later, tok, mdoc, line, ppos);
1.83      schwarze  751:
                    752:                        /*
                    753:                         * Mark the place where the formatting - but not
                    754:                         * the scope - of the current block ends.
                    755:                         */
1.119     schwarze  756:                        if ( ! mdoc_endbody_alloc(mdoc, line, ppos,
1.83      schwarze  757:                            atok, body, ENDBODY_SPACE))
                    758:                                return(0);
                    759:                        break;
                    760:                }
                    761:
                    762:                /*
                    763:                 * When finding an open sub block, remember the last
                    764:                 * open explicit block, or, in case there are only
                    765:                 * implicit ones, the first open implicit block.
                    766:                 */
                    767:                if (later &&
                    768:                    MDOC_EXPLICIT & mdoc_macros[later->tok].flags)
                    769:                        continue;
1.118     schwarze  770:                if (MDOC_It != n->tok)
1.83      schwarze  771:                        later = n;
                    772:        }
                    773:
1.136     schwarze  774:        if ( ! (MDOC_PARSED & mdoc_macros[tok].flags)) {
                    775:                if ('\0' != buf[*pos])
                    776:                        mandoc_vmsg(MANDOCERR_ARG_SKIP,
                    777:                            mdoc->parse, line, ppos,
                    778:                            "%s %s", mdoc_macronames[tok],
                    779:                            buf + *pos);
1.119     schwarze  780:                if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1.22      kristaps  781:                        return(0);
1.119     schwarze  782:                return(rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos));
1.1       kristaps  783:        }
                    784:
1.119     schwarze  785:        if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1.1       kristaps  786:                return(0);
                    787:
1.131     schwarze  788:        if (NULL == later && maxargs > 0)
1.119     schwarze  789:                if ( ! mdoc_tail_alloc(mdoc, line, ppos, rew_alt(tok)))
1.1       kristaps  790:                        return(0);
                    791:
1.27      kristaps  792:        for (flushed = j = 0; ; j++) {
1.1       kristaps  793:                lastarg = *pos;
                    794:
                    795:                if (j == maxargs && ! flushed) {
1.119     schwarze  796:                        if ( ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
1.1       kristaps  797:                                return(0);
                    798:                        flushed = 1;
                    799:                }
                    800:
1.119     schwarze  801:                ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1.1       kristaps  802:
1.53      kristaps  803:                if (ARGS_ERROR == ac)
1.1       kristaps  804:                        return(0);
1.53      kristaps  805:                if (ARGS_PUNCT == ac)
1.1       kristaps  806:                        break;
1.53      kristaps  807:                if (ARGS_EOLN == ac)
1.1       kristaps  808:                        break;
                    809:
1.54      kristaps  810:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                    811:
                    812:                if (MDOC_MAX == ntok) {
1.123     schwarze  813:                        if ( ! dword(mdoc, line, lastarg, p, DELIM_MAX,
                    814:                            MDOC_JOIN & mdoc_macros[tok].flags))
1.1       kristaps  815:                                return(0);
1.54      kristaps  816:                        continue;
                    817:                }
1.1       kristaps  818:
1.54      kristaps  819:                if ( ! flushed) {
1.119     schwarze  820:                        if ( ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
1.54      kristaps  821:                                return(0);
                    822:                        flushed = 1;
                    823:                }
1.122     schwarze  824:
                    825:                mdoc->flags &= ~MDOC_NEWLINE;
                    826:
1.119     schwarze  827:                if ( ! mdoc_macro(mdoc, ntok, line, lastarg, pos, buf))
1.1       kristaps  828:                        return(0);
1.54      kristaps  829:                break;
1.1       kristaps  830:        }
                    831:
1.119     schwarze  832:        if ( ! flushed && ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
1.1       kristaps  833:                return(0);
                    834:
1.60      kristaps  835:        if ( ! nl)
1.1       kristaps  836:                return(1);
1.119     schwarze  837:        return(append_delims(mdoc, line, pos, buf));
1.1       kristaps  838: }
                    839:
                    840: static int
                    841: in_line(MACRO_PROT_ARGS)
                    842: {
1.144     schwarze  843:        int              la, scope, cnt, firstarg, mayopen, nc, nl;
1.56      kristaps  844:        enum margverr    av;
1.53      kristaps  845:        enum mdoct       ntok;
1.55      kristaps  846:        enum margserr    ac;
1.67      schwarze  847:        enum mdelim      d;
1.53      kristaps  848:        struct mdoc_arg *arg;
                    849:        char            *p;
1.1       kristaps  850:
1.119     schwarze  851:        nl = MDOC_NEWLINE & mdoc->flags;
1.60      kristaps  852:
1.4       kristaps  853:        /*
                    854:         * Whether we allow ignored elements (those without content,
                    855:         * usually because of reserved words) to squeak by.
                    856:         */
1.45      kristaps  857:
1.4       kristaps  858:        switch (tok) {
1.131     schwarze  859:        case MDOC_An:
1.26      kristaps  860:                /* FALLTHROUGH */
1.131     schwarze  861:        case MDOC_Ar:
1.4       kristaps  862:                /* FALLTHROUGH */
1.131     schwarze  863:        case MDOC_Fl:
1.4       kristaps  864:                /* FALLTHROUGH */
1.131     schwarze  865:        case MDOC_Mt:
1.12      kristaps  866:                /* FALLTHROUGH */
1.131     schwarze  867:        case MDOC_Nm:
1.26      kristaps  868:                /* FALLTHROUGH */
1.131     schwarze  869:        case MDOC_Pa:
1.4       kristaps  870:                nc = 1;
                    871:                break;
                    872:        default:
                    873:                nc = 0;
                    874:                break;
                    875:        }
                    876:
1.27      kristaps  877:        for (arg = NULL;; ) {
1.1       kristaps  878:                la = *pos;
1.119     schwarze  879:                av = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
1.1       kristaps  880:
1.56      kristaps  881:                if (ARGV_WORD == av) {
1.1       kristaps  882:                        *pos = la;
                    883:                        break;
1.131     schwarze  884:                }
1.56      kristaps  885:                if (ARGV_EOLN == av)
1.1       kristaps  886:                        break;
1.56      kristaps  887:                if (ARGV_ARG == av)
1.1       kristaps  888:                        continue;
                    889:
                    890:                mdoc_argv_free(arg);
                    891:                return(0);
                    892:        }
                    893:
1.144     schwarze  894:        d = DELIM_NONE;
                    895:        firstarg = 1;
1.142     schwarze  896:        mayopen = 1;
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:
1.144     schwarze  901:                if (ac == ARGS_ERROR)
1.1       kristaps  902:                        return(0);
1.144     schwarze  903:
                    904:                /*
                    905:                 * At the end of a macro line,
                    906:                 * opening delimiters do not suppress spacing.
                    907:                 */
                    908:
                    909:                if (ac == ARGS_EOLN) {
                    910:                        if (d == DELIM_OPEN)
                    911:                                mdoc->last->flags &= ~MDOC_DELIMO;
1.1       kristaps  912:                        break;
1.144     schwarze  913:                }
                    914:
                    915:                /*
                    916:                 * The rest of the macro line is only punctuation,
                    917:                 * to be handled by append_delims().
                    918:                 * If there were no other arguments,
                    919:                 * do not allow the first one to suppress spacing,
                    920:                 * even if it turns out to be a closing one.
                    921:                 */
                    922:
                    923:                if (ac == ARGS_PUNCT) {
                    924:                        if (cnt == 0 && nc == 0)
                    925:                                mdoc->flags |= MDOC_NODELIMC;
1.1       kristaps  926:                        break;
1.144     schwarze  927:                }
1.1       kristaps  928:
1.145   ! schwarze  929:                ntok = (ac == ARGS_QWORD || (tok == MDOC_Fn && !cnt)) ?
        !           930:                    MDOC_MAX : lookup(tok, p);
1.1       kristaps  931:
1.131     schwarze  932:                /*
1.4       kristaps  933:                 * In this case, we've located a submacro and must
                    934:                 * execute it.  Close out scope, if open.  If no
                    935:                 * elements have been generated, either create one (nc)
                    936:                 * or raise a warning.
                    937:                 */
1.1       kristaps  938:
1.53      kristaps  939:                if (MDOC_MAX != ntok) {
1.119     schwarze  940:                        if (scope && ! rew_elem(mdoc, tok))
1.1       kristaps  941:                                return(0);
1.4       kristaps  942:                        if (nc && 0 == cnt) {
1.131     schwarze  943:                                if ( ! mdoc_elem_alloc(mdoc,
                    944:                                    line, ppos, tok, arg))
1.3       kristaps  945:                                        return(0);
1.119     schwarze  946:                                if ( ! rew_last(mdoc, mdoc->last))
1.12      kristaps  947:                                        return(0);
1.7       kristaps  948:                        } else if ( ! nc && 0 == cnt) {
                    949:                                mdoc_argv_free(arg);
1.135     schwarze  950:                                mandoc_msg(MANDOCERR_MACRO_EMPTY,
                    951:                                    mdoc->parse, line, ppos,
                    952:                                    mdoc_macronames[tok]);
1.7       kristaps  953:                        }
1.103     kristaps  954:
1.119     schwarze  955:                        if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1.1       kristaps  956:                                return(0);
1.60      kristaps  957:                        if ( ! nl)
1.1       kristaps  958:                                return(1);
1.119     schwarze  959:                        return(append_delims(mdoc, line, pos, buf));
1.131     schwarze  960:                }
1.1       kristaps  961:
1.131     schwarze  962:                /*
1.4       kristaps  963:                 * Non-quote-enclosed punctuation.  Set up our scope, if
                    964:                 * a word; rewind the scope, if a delimiter; then append
1.131     schwarze  965:                 * the word.
1.4       kristaps  966:                 */
1.1       kristaps  967:
1.105     kristaps  968:                d = ARGS_QWORD == ac ? DELIM_NONE : mdoc_isdelim(p);
1.3       kristaps  969:
1.70      kristaps  970:                if (DELIM_NONE != d) {
                    971:                        /*
                    972:                         * If we encounter closing punctuation, no word
1.144     schwarze  973:                         * has been emitted, no scope is open, and we're
1.70      kristaps  974:                         * allowed to have an empty element, then start
1.142     schwarze  975:                         * a new scope.
1.70      kristaps  976:                         */
1.142     schwarze  977:                        if ((d == DELIM_CLOSE ||
                    978:                             (d == DELIM_MIDDLE && tok == MDOC_Fl)) &&
1.144     schwarze  979:                            !cnt && !scope && nc && mayopen) {
1.131     schwarze  980:                                if ( ! mdoc_elem_alloc(mdoc,
                    981:                                    line, ppos, tok, arg))
1.70      kristaps  982:                                        return(0);
                    983:                                scope = 1;
1.142     schwarze  984:                                cnt++;
1.144     schwarze  985:                                if (MDOC_Nm == tok)
1.142     schwarze  986:                                        mayopen = 0;
1.70      kristaps  987:                        }
                    988:                        /*
                    989:                         * Close out our scope, if one is open, before
                    990:                         * any punctuation.
                    991:                         */
1.119     schwarze  992:                        if (scope && ! rew_elem(mdoc, tok))
1.1       kristaps  993:                                return(0);
1.70      kristaps  994:                        scope = 0;
1.145   ! schwarze  995:                        if (tok == MDOC_Fn)
        !           996:                                mayopen = 0;
1.142     schwarze  997:                } else if (mayopen && !scope) {
1.119     schwarze  998:                        if ( ! mdoc_elem_alloc(mdoc, line, ppos, tok, arg))
1.1       kristaps  999:                                return(0);
1.70      kristaps 1000:                        scope = 1;
1.142     schwarze 1001:                        cnt++;
1.1       kristaps 1002:                }
1.105     kristaps 1003:
1.123     schwarze 1004:                if ( ! dword(mdoc, line, la, p, d,
                   1005:                    MDOC_JOIN & mdoc_macros[tok].flags))
1.1       kristaps 1006:                        return(0);
1.39      kristaps 1007:
                   1008:                /*
1.144     schwarze 1009:                 * If the first argument is a closing delimiter,
                   1010:                 * do not suppress spacing before it.
                   1011:                 */
                   1012:
                   1013:                if (firstarg && d == DELIM_CLOSE && !nc)
                   1014:                        mdoc->last->flags &= ~MDOC_DELIMC;
                   1015:                firstarg = 0;
                   1016:
                   1017:                /*
1.39      kristaps 1018:                 * `Fl' macros have their scope re-opened with each new
                   1019:                 * word so that the `-' can be added to each one without
                   1020:                 * having to parse out spaces.
                   1021:                 */
1.70      kristaps 1022:                if (scope && MDOC_Fl == tok) {
1.119     schwarze 1023:                        if ( ! rew_elem(mdoc, tok))
1.39      kristaps 1024:                                return(0);
1.70      kristaps 1025:                        scope = 0;
1.39      kristaps 1026:                }
1.1       kristaps 1027:        }
                   1028:
1.119     schwarze 1029:        if (scope && ! rew_elem(mdoc, tok))
1.1       kristaps 1030:                return(0);
1.4       kristaps 1031:
                   1032:        /*
                   1033:         * If no elements have been collected and we're allowed to have
                   1034:         * empties (nc), open a scope and close it out.  Otherwise,
                   1035:         * raise a warning.
                   1036:         */
1.45      kristaps 1037:
1.4       kristaps 1038:        if (nc && 0 == cnt) {
1.119     schwarze 1039:                if ( ! mdoc_elem_alloc(mdoc, line, ppos, tok, arg))
1.3       kristaps 1040:                        return(0);
1.119     schwarze 1041:                if ( ! rew_last(mdoc, mdoc->last))
1.12      kristaps 1042:                        return(0);
1.7       kristaps 1043:        } else if ( ! nc && 0 == cnt) {
                   1044:                mdoc_argv_free(arg);
1.135     schwarze 1045:                mandoc_msg(MANDOCERR_MACRO_EMPTY, mdoc->parse,
                   1046:                    line, ppos, mdoc_macronames[tok]);
1.7       kristaps 1047:        }
1.4       kristaps 1048:
1.60      kristaps 1049:        if ( ! nl)
1.1       kristaps 1050:                return(1);
1.119     schwarze 1051:        return(append_delims(mdoc, line, pos, buf));
1.1       kristaps 1052: }
                   1053:
                   1054: static int
                   1055: blk_full(MACRO_PROT_ARGS)
                   1056: {
1.114     kristaps 1057:        int               la, nl, nparsed;
1.1       kristaps 1058:        struct mdoc_arg  *arg;
1.45      kristaps 1059:        struct mdoc_node *head; /* save of head macro */
1.49      kristaps 1060:        struct mdoc_node *body; /* save of body macro */
1.47      kristaps 1061:        struct mdoc_node *n;
1.74      kristaps 1062:        enum mdoc_type    mtt;
1.53      kristaps 1063:        enum mdoct        ntok;
1.59      kristaps 1064:        enum margserr     ac, lac;
1.56      kristaps 1065:        enum margverr     av;
1.1       kristaps 1066:        char             *p;
                   1067:
1.119     schwarze 1068:        nl = MDOC_NEWLINE & mdoc->flags;
1.138     schwarze 1069:
                   1070:        /* Skip items outside lists. */
                   1071:
                   1072:        if (tok == MDOC_It) {
                   1073:                for (n = mdoc->last; n; n = n->parent)
1.141     schwarze 1074:                        if (n->tok == MDOC_Bl &&
                   1075:                            ! (n->flags & MDOC_VALID))
1.138     schwarze 1076:                                break;
                   1077:                if (n == NULL) {
                   1078:                        mandoc_vmsg(MANDOCERR_IT_STRAY, mdoc->parse,
                   1079:                            line, ppos, "It %s", buf + *pos);
                   1080:                        if ( ! mdoc_elem_alloc(mdoc, line, ppos,
                   1081:                            MDOC_br, NULL))
                   1082:                                return(0);
                   1083:                        return(rew_elem(mdoc, MDOC_br));
                   1084:                }
                   1085:        }
1.63      kristaps 1086:
1.45      kristaps 1087:        /* Close out prior implicit scope. */
1.19      kristaps 1088:
1.1       kristaps 1089:        if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)) {
1.119     schwarze 1090:                if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1.1       kristaps 1091:                        return(0);
1.119     schwarze 1092:                if ( ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
1.1       kristaps 1093:                        return(0);
                   1094:        }
                   1095:
1.45      kristaps 1096:        /*
1.109     kristaps 1097:         * This routine accommodates implicitly- and explicitly-scoped
1.45      kristaps 1098:         * macro openings.  Implicit ones first close out prior scope
                   1099:         * (seen above).  Delay opening the head until necessary to
                   1100:         * allow leading punctuation to print.  Special consideration
                   1101:         * for `It -column', which has phrase-part syntax instead of
                   1102:         * regular child nodes.
                   1103:         */
                   1104:
1.1       kristaps 1105:        for (arg = NULL;; ) {
1.45      kristaps 1106:                la = *pos;
1.119     schwarze 1107:                av = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
1.1       kristaps 1108:
1.56      kristaps 1109:                if (ARGV_WORD == av) {
1.45      kristaps 1110:                        *pos = la;
1.1       kristaps 1111:                        break;
1.131     schwarze 1112:                }
1.1       kristaps 1113:
1.56      kristaps 1114:                if (ARGV_EOLN == av)
1.1       kristaps 1115:                        break;
1.56      kristaps 1116:                if (ARGV_ARG == av)
1.1       kristaps 1117:                        continue;
                   1118:
                   1119:                mdoc_argv_free(arg);
                   1120:                return(0);
                   1121:        }
                   1122:
1.119     schwarze 1123:        if ( ! mdoc_block_alloc(mdoc, line, ppos, tok, arg))
1.1       kristaps 1124:                return(0);
                   1125:
1.49      kristaps 1126:        head = body = NULL;
1.115     schwarze 1127:
                   1128:        /*
                   1129:         * Exception: Heads of `It' macros in `-diag' lists are not
                   1130:         * parsed, even though `It' macros in general are parsed.
                   1131:         */
                   1132:        nparsed = MDOC_It == tok &&
1.131     schwarze 1133:            MDOC_Bl == mdoc->last->parent->tok &&
                   1134:            LIST_diag == mdoc->last->parent->norm->Bl.type;
1.1       kristaps 1135:
1.45      kristaps 1136:        /*
                   1137:         * The `Nd' macro has all arguments in its body: it's a hybrid
                   1138:         * of block partial-explicit and full-implicit.  Stupid.
                   1139:         */
1.19      kristaps 1140:
1.45      kristaps 1141:        if (MDOC_Nd == tok) {
1.119     schwarze 1142:                if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1.45      kristaps 1143:                        return(0);
1.119     schwarze 1144:                head = mdoc->last;
                   1145:                if ( ! rew_sub(MDOC_HEAD, mdoc, tok, line, ppos))
1.19      kristaps 1146:                        return(0);
1.119     schwarze 1147:                if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.19      kristaps 1148:                        return(0);
1.119     schwarze 1149:                body = mdoc->last;
1.123     schwarze 1150:        }
                   1151:
                   1152:        if (MDOC_Bk == tok)
                   1153:                mdoc->flags |= MDOC_KEEP;
1.19      kristaps 1154:
1.59      kristaps 1155:        ac = ARGS_ERROR;
                   1156:
1.62      kristaps 1157:        for ( ; ; ) {
1.45      kristaps 1158:                la = *pos;
1.75      kristaps 1159:                /* Initialise last-phrase-type with ARGS_PEND. */
                   1160:                lac = ARGS_ERROR == ac ? ARGS_PEND : ac;
1.119     schwarze 1161:                ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1.89      schwarze 1162:
                   1163:                if (ARGS_PUNCT == ac)
                   1164:                        break;
1.1       kristaps 1165:
1.53      kristaps 1166:                if (ARGS_ERROR == ac)
1.1       kristaps 1167:                        return(0);
1.75      kristaps 1168:
                   1169:                if (ARGS_EOLN == ac) {
                   1170:                        if (ARGS_PPHRASE != lac && ARGS_PHRASE != lac)
                   1171:                                break;
                   1172:                        /*
                   1173:                         * This is necessary: if the last token on a
                   1174:                         * line is a `Ta' or tab, then we'll get
                   1175:                         * ARGS_EOLN, so we must be smart enough to
                   1176:                         * reopen our scope if the last parse was a
                   1177:                         * phrase or partial phrase.
                   1178:                         */
1.119     schwarze 1179:                        if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1.75      kristaps 1180:                                return(0);
1.119     schwarze 1181:                        if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.75      kristaps 1182:                                return(0);
1.119     schwarze 1183:                        body = mdoc->last;
1.1       kristaps 1184:                        break;
1.75      kristaps 1185:                }
1.45      kristaps 1186:
1.131     schwarze 1187:                /*
1.73      kristaps 1188:                 * Emit leading punctuation (i.e., punctuation before
                   1189:                 * the MDOC_HEAD) for non-phrase types.
                   1190:                 */
1.45      kristaps 1191:
1.131     schwarze 1192:                if (NULL == head &&
                   1193:                    ARGS_PEND != ac &&
                   1194:                    ARGS_PHRASE != ac &&
                   1195:                    ARGS_PPHRASE != ac &&
                   1196:                    ARGS_QWORD != ac &&
                   1197:                    DELIM_OPEN == mdoc_isdelim(p)) {
1.123     schwarze 1198:                        if ( ! dword(mdoc, line, la, p, DELIM_OPEN, 0))
1.45      kristaps 1199:                                return(0);
                   1200:                        continue;
                   1201:                }
                   1202:
1.74      kristaps 1203:                /* Open a head if one hasn't been opened. */
1.45      kristaps 1204:
1.74      kristaps 1205:                if (NULL == head) {
1.119     schwarze 1206:                        if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1.45      kristaps 1207:                                return(0);
1.119     schwarze 1208:                        head = mdoc->last;
1.45      kristaps 1209:                }
                   1210:
1.131     schwarze 1211:                if (ARGS_PHRASE == ac ||
                   1212:                    ARGS_PEND == ac ||
                   1213:                    ARGS_PPHRASE == ac) {
1.73      kristaps 1214:                        /*
1.74      kristaps 1215:                         * If we haven't opened a body yet, rewind the
                   1216:                         * head; if we have, rewind that instead.
                   1217:                         */
                   1218:
                   1219:                        mtt = body ? MDOC_BODY : MDOC_HEAD;
1.119     schwarze 1220:                        if ( ! rew_sub(mtt, mdoc, tok, line, ppos))
1.74      kristaps 1221:                                return(0);
1.131     schwarze 1222:
1.74      kristaps 1223:                        /* Then allocate our body context. */
                   1224:
1.119     schwarze 1225:                        if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.74      kristaps 1226:                                return(0);
1.119     schwarze 1227:                        body = mdoc->last;
1.74      kristaps 1228:
                   1229:                        /*
1.73      kristaps 1230:                         * Process phrases: set whether we're in a
                   1231:                         * partial-phrase (this effects line handling)
                   1232:                         * then call down into the phrase parser.
                   1233:                         */
1.74      kristaps 1234:
1.65      kristaps 1235:                        if (ARGS_PPHRASE == ac)
1.119     schwarze 1236:                                mdoc->flags |= MDOC_PPHRASE;
1.71      kristaps 1237:                        if (ARGS_PEND == ac && ARGS_PPHRASE == lac)
1.119     schwarze 1238:                                mdoc->flags |= MDOC_PPHRASE;
1.71      kristaps 1239:
1.119     schwarze 1240:                        if ( ! phrase(mdoc, line, la, buf))
1.1       kristaps 1241:                                return(0);
1.71      kristaps 1242:
1.119     schwarze 1243:                        mdoc->flags &= ~MDOC_PPHRASE;
1.1       kristaps 1244:                        continue;
                   1245:                }
                   1246:
1.131     schwarze 1247:                ntok = nparsed || ARGS_QWORD == ac ?
                   1248:                    MDOC_MAX : lookup(tok, p);
1.54      kristaps 1249:
                   1250:                if (MDOC_MAX == ntok) {
1.123     schwarze 1251:                        if ( ! dword(mdoc, line, la, p, DELIM_MAX,
                   1252:                            MDOC_JOIN & mdoc_macros[tok].flags))
1.1       kristaps 1253:                                return(0);
1.53      kristaps 1254:                        continue;
1.45      kristaps 1255:                }
1.53      kristaps 1256:
1.119     schwarze 1257:                if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1.45      kristaps 1258:                        return(0);
1.53      kristaps 1259:                break;
1.45      kristaps 1260:        }
1.1       kristaps 1261:
1.45      kristaps 1262:        if (NULL == head) {
1.119     schwarze 1263:                if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1.1       kristaps 1264:                        return(0);
1.119     schwarze 1265:                head = mdoc->last;
1.1       kristaps 1266:        }
1.131     schwarze 1267:
1.119     schwarze 1268:        if (nl && ! append_delims(mdoc, line, pos, buf))
1.1       kristaps 1269:                return(0);
1.19      kristaps 1270:
1.49      kristaps 1271:        /* If we've already opened our body, exit now. */
1.45      kristaps 1272:
1.49      kristaps 1273:        if (NULL != body)
1.77      kristaps 1274:                goto out;
1.19      kristaps 1275:
1.47      kristaps 1276:        /*
1.49      kristaps 1277:         * If there is an open (i.e., unvalidated) sub-block requiring
                   1278:         * explicit close-out, postpone switching the current block from
                   1279:         * head to body until the rew_sub() call closing out that
                   1280:         * sub-block.
1.47      kristaps 1281:         */
1.119     schwarze 1282:        for (n = mdoc->last; n && n != head; n = n->parent) {
1.131     schwarze 1283:                if (MDOC_BLOCK == n->type &&
                   1284:                    MDOC_EXPLICIT & mdoc_macros[n->tok].flags &&
                   1285:                    ! (MDOC_VALID & n->flags)) {
1.47      kristaps 1286:                        n->pending = head;
                   1287:                        return(1);
                   1288:                }
                   1289:        }
                   1290:
1.45      kristaps 1291:        /* Close out scopes to remain in a consistent state. */
                   1292:
1.119     schwarze 1293:        if ( ! rew_sub(MDOC_HEAD, mdoc, tok, line, ppos))
1.1       kristaps 1294:                return(0);
1.119     schwarze 1295:        if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.1       kristaps 1296:                return(0);
                   1297:
1.77      kristaps 1298: out:
1.119     schwarze 1299:        if ( ! (MDOC_FREECOL & mdoc->flags))
1.77      kristaps 1300:                return(1);
                   1301:
1.119     schwarze 1302:        if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1.77      kristaps 1303:                return(0);
1.119     schwarze 1304:        if ( ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
1.77      kristaps 1305:                return(0);
                   1306:
1.119     schwarze 1307:        mdoc->flags &= ~MDOC_FREECOL;
1.1       kristaps 1308:        return(1);
                   1309: }
                   1310:
                   1311: static int
                   1312: blk_part_imp(MACRO_PROT_ARGS)
                   1313: {
1.63      kristaps 1314:        int               la, nl;
1.53      kristaps 1315:        enum mdoct        ntok;
1.55      kristaps 1316:        enum margserr     ac;
1.1       kristaps 1317:        char             *p;
1.43      kristaps 1318:        struct mdoc_node *blk; /* saved block context */
                   1319:        struct mdoc_node *body; /* saved body context */
                   1320:        struct mdoc_node *n;
1.1       kristaps 1321:
1.119     schwarze 1322:        nl = MDOC_NEWLINE & mdoc->flags;
1.63      kristaps 1323:
1.43      kristaps 1324:        /*
                   1325:         * A macro that spans to the end of the line.  This is generally
                   1326:         * (but not necessarily) called as the first macro.  The block
                   1327:         * has a head as the immediate child, which is always empty,
                   1328:         * followed by zero or more opening punctuation nodes, then the
                   1329:         * body (which may be empty, depending on the macro), then zero
                   1330:         * or more closing punctuation nodes.
                   1331:         */
1.32      kristaps 1332:
1.119     schwarze 1333:        if ( ! mdoc_block_alloc(mdoc, line, ppos, tok, NULL))
1.32      kristaps 1334:                return(0);
1.43      kristaps 1335:
1.119     schwarze 1336:        blk = mdoc->last;
1.43      kristaps 1337:
1.119     schwarze 1338:        if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1.1       kristaps 1339:                return(0);
1.119     schwarze 1340:        if ( ! rew_sub(MDOC_HEAD, mdoc, tok, line, ppos))
1.1       kristaps 1341:                return(0);
                   1342:
1.43      kristaps 1343:        /*
                   1344:         * Open the body scope "on-demand", that is, after we've
                   1345:         * processed all our the leading delimiters (open parenthesis,
                   1346:         * etc.).
                   1347:         */
1.1       kristaps 1348:
1.43      kristaps 1349:        for (body = NULL; ; ) {
1.32      kristaps 1350:                la = *pos;
1.119     schwarze 1351:                ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1.43      kristaps 1352:
1.53      kristaps 1353:                if (ARGS_ERROR == ac)
1.1       kristaps 1354:                        return(0);
1.53      kristaps 1355:                if (ARGS_EOLN == ac)
1.43      kristaps 1356:                        break;
1.53      kristaps 1357:                if (ARGS_PUNCT == ac)
1.1       kristaps 1358:                        break;
                   1359:
1.53      kristaps 1360:                if (NULL == body && ARGS_QWORD != ac &&
1.131     schwarze 1361:                    DELIM_OPEN == mdoc_isdelim(p)) {
1.123     schwarze 1362:                        if ( ! dword(mdoc, line, la, p, DELIM_OPEN, 0))
1.1       kristaps 1363:                                return(0);
                   1364:                        continue;
1.123     schwarze 1365:                }
1.1       kristaps 1366:
1.43      kristaps 1367:                if (NULL == body) {
1.119     schwarze 1368:                       if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.43      kristaps 1369:                               return(0);
1.119     schwarze 1370:                        body = mdoc->last;
1.43      kristaps 1371:                }
                   1372:
1.54      kristaps 1373:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1374:
                   1375:                if (MDOC_MAX == ntok) {
1.123     schwarze 1376:                        if ( ! dword(mdoc, line, la, p, DELIM_MAX,
                   1377:                            MDOC_JOIN & mdoc_macros[tok].flags))
1.43      kristaps 1378:                                return(0);
1.53      kristaps 1379:                        continue;
                   1380:                }
1.43      kristaps 1381:
1.119     schwarze 1382:                if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1.1       kristaps 1383:                        return(0);
1.53      kristaps 1384:                break;
1.1       kristaps 1385:        }
                   1386:
1.43      kristaps 1387:        /* Clean-ups to leave in a consistent state. */
                   1388:
1.44      kristaps 1389:        if (NULL == body) {
1.119     schwarze 1390:                if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.44      kristaps 1391:                        return(0);
1.119     schwarze 1392:                body = mdoc->last;
1.44      kristaps 1393:        }
1.43      kristaps 1394:
1.83      schwarze 1395:        /*
                   1396:         * If there is an open sub-block requiring explicit close-out,
                   1397:         * postpone closing out the current block
                   1398:         * until the rew_sub() call closing out the sub-block.
                   1399:         */
1.119     schwarze 1400:        for (n = mdoc->last; n && n != body && n != blk->parent;
1.131     schwarze 1401:             n = n->parent) {
1.83      schwarze 1402:                if (MDOC_BLOCK == n->type &&
                   1403:                    MDOC_EXPLICIT & mdoc_macros[n->tok].flags &&
                   1404:                    ! (MDOC_VALID & n->flags)) {
1.119     schwarze 1405:                        make_pending(n, tok, mdoc, line, ppos);
                   1406:                        if ( ! mdoc_endbody_alloc(mdoc, line, ppos,
1.83      schwarze 1407:                            tok, body, ENDBODY_NOSPACE))
                   1408:                                return(0);
                   1409:                        return(1);
                   1410:                }
                   1411:        }
1.134     schwarze 1412:        assert(n == body);
1.83      schwarze 1413:
1.134     schwarze 1414:        if ( ! rew_sub(MDOC_BODY, mdoc, tok, line, ppos))
1.32      kristaps 1415:                return(0);
1.1       kristaps 1416:
1.32      kristaps 1417:        /* Standard appending of delimiters. */
1.1       kristaps 1418:
1.119     schwarze 1419:        if (nl && ! append_delims(mdoc, line, pos, buf))
1.1       kristaps 1420:                return(0);
                   1421:
1.32      kristaps 1422:        /* Rewind scope, if applicable. */
1.1       kristaps 1423:
1.134     schwarze 1424:        if ( ! rew_sub(MDOC_BLOCK, mdoc, tok, line, ppos))
1.1       kristaps 1425:                return(0);
1.117     schwarze 1426:
                   1427:        /* Move trailing .Ns out of scope. */
                   1428:
                   1429:        for (n = body->child; n && n->next; n = n->next)
                   1430:                /* Do nothing. */ ;
                   1431:        if (n && MDOC_Ns == n->tok)
1.119     schwarze 1432:                mdoc_node_relink(mdoc, n);
1.1       kristaps 1433:
                   1434:        return(1);
                   1435: }
                   1436:
                   1437: static int
                   1438: blk_part_exp(MACRO_PROT_ARGS)
                   1439: {
1.60      kristaps 1440:        int               la, nl;
1.55      kristaps 1441:        enum margserr     ac;
1.43      kristaps 1442:        struct mdoc_node *head; /* keep track of head */
                   1443:        struct mdoc_node *body; /* keep track of body */
1.1       kristaps 1444:        char             *p;
1.53      kristaps 1445:        enum mdoct        ntok;
1.1       kristaps 1446:
1.119     schwarze 1447:        nl = MDOC_NEWLINE & mdoc->flags;
1.60      kristaps 1448:
1.43      kristaps 1449:        /*
                   1450:         * The opening of an explicit macro having zero or more leading
                   1451:         * punctuation nodes; a head with optional single element (the
                   1452:         * case of `Eo'); and a body that may be empty.
                   1453:         */
1.32      kristaps 1454:
1.119     schwarze 1455:        if ( ! mdoc_block_alloc(mdoc, line, ppos, tok, NULL))
1.131     schwarze 1456:                return(0);
1.32      kristaps 1457:
1.43      kristaps 1458:        for (head = body = NULL; ; ) {
1.32      kristaps 1459:                la = *pos;
1.119     schwarze 1460:                ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1.1       kristaps 1461:
1.53      kristaps 1462:                if (ARGS_ERROR == ac)
1.1       kristaps 1463:                        return(0);
1.53      kristaps 1464:                if (ARGS_PUNCT == ac)
1.1       kristaps 1465:                        break;
1.53      kristaps 1466:                if (ARGS_EOLN == ac)
1.1       kristaps 1467:                        break;
1.43      kristaps 1468:
                   1469:                /* Flush out leading punctuation. */
                   1470:
1.53      kristaps 1471:                if (NULL == head && ARGS_QWORD != ac &&
1.131     schwarze 1472:                    DELIM_OPEN == mdoc_isdelim(p)) {
1.43      kristaps 1473:                        assert(NULL == body);
1.123     schwarze 1474:                        if ( ! dword(mdoc, line, la, p, DELIM_OPEN, 0))
1.43      kristaps 1475:                                return(0);
                   1476:                        continue;
1.123     schwarze 1477:                }
1.43      kristaps 1478:
                   1479:                if (NULL == head) {
                   1480:                        assert(NULL == body);
1.119     schwarze 1481:                        if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1.1       kristaps 1482:                                return(0);
1.119     schwarze 1483:                        head = mdoc->last;
1.1       kristaps 1484:                }
                   1485:
1.43      kristaps 1486:                /*
                   1487:                 * `Eo' gobbles any data into the head, but most other
                   1488:                 * macros just immediately close out and begin the body.
                   1489:                 */
                   1490:
                   1491:                if (NULL == body) {
                   1492:                        assert(head);
                   1493:                        /* No check whether it's a macro! */
                   1494:                        if (MDOC_Eo == tok)
1.123     schwarze 1495:                                if ( ! dword(mdoc, line, la, p, DELIM_MAX, 0))
1.43      kristaps 1496:                                        return(0);
                   1497:
1.119     schwarze 1498:                        if ( ! rew_sub(MDOC_HEAD, mdoc, tok, line, ppos))
1.1       kristaps 1499:                                return(0);
1.119     schwarze 1500:                        if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.1       kristaps 1501:                                return(0);
1.119     schwarze 1502:                        body = mdoc->last;
1.43      kristaps 1503:
                   1504:                        if (MDOC_Eo == tok)
                   1505:                                continue;
1.1       kristaps 1506:                }
1.43      kristaps 1507:
                   1508:                assert(NULL != head && NULL != body);
                   1509:
1.54      kristaps 1510:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1511:
                   1512:                if (MDOC_MAX == ntok) {
1.123     schwarze 1513:                        if ( ! dword(mdoc, line, la, p, DELIM_MAX,
                   1514:                            MDOC_JOIN & mdoc_macros[tok].flags))
1.43      kristaps 1515:                                return(0);
1.53      kristaps 1516:                        continue;
1.43      kristaps 1517:                }
                   1518:
1.119     schwarze 1519:                if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1.1       kristaps 1520:                        return(0);
1.53      kristaps 1521:                break;
1.1       kristaps 1522:        }
                   1523:
1.43      kristaps 1524:        /* Clean-up to leave in a consistent state. */
1.32      kristaps 1525:
1.112     schwarze 1526:        if (NULL == head)
1.119     schwarze 1527:                if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
1.43      kristaps 1528:                        return(0);
                   1529:
                   1530:        if (NULL == body) {
1.119     schwarze 1531:                if ( ! rew_sub(MDOC_HEAD, mdoc, tok, line, ppos))
1.1       kristaps 1532:                        return(0);
1.119     schwarze 1533:                if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
1.1       kristaps 1534:                        return(0);
                   1535:        }
                   1536:
1.32      kristaps 1537:        /* Standard appending of delimiters. */
                   1538:
1.60      kristaps 1539:        if ( ! nl)
1.1       kristaps 1540:                return(1);
1.119     schwarze 1541:        return(append_delims(mdoc, line, pos, buf));
1.1       kristaps 1542: }
                   1543:
                   1544: static int
                   1545: in_line_argn(MACRO_PROT_ARGS)
                   1546: {
1.60      kristaps 1547:        int              la, flushed, j, maxargs, nl;
1.55      kristaps 1548:        enum margserr    ac;
1.56      kristaps 1549:        enum margverr    av;
1.53      kristaps 1550:        struct mdoc_arg *arg;
                   1551:        char            *p;
                   1552:        enum mdoct       ntok;
1.1       kristaps 1553:
1.119     schwarze 1554:        nl = MDOC_NEWLINE & mdoc->flags;
1.60      kristaps 1555:
1.46      kristaps 1556:        /*
                   1557:         * A line macro that has a fixed number of arguments (maxargs).
                   1558:         * Only open the scope once the first non-leading-punctuation is
                   1559:         * found (unless MDOC_IGNDELIM is noted, like in `Pf'), then
                   1560:         * keep it open until the maximum number of arguments are
                   1561:         * exhausted.
                   1562:         */
1.1       kristaps 1563:
                   1564:        switch (tok) {
1.131     schwarze 1565:        case MDOC_Ap:
1.1       kristaps 1566:                /* FALLTHROUGH */
1.131     schwarze 1567:        case MDOC_Ns:
1.1       kristaps 1568:                /* FALLTHROUGH */
1.131     schwarze 1569:        case MDOC_Ux:
1.1       kristaps 1570:                maxargs = 0;
                   1571:                break;
1.131     schwarze 1572:        case MDOC_Bx:
1.101     kristaps 1573:                /* FALLTHROUGH */
1.132     schwarze 1574:        case MDOC_Es:
                   1575:                /* FALLTHROUGH */
1.131     schwarze 1576:        case MDOC_Xr:
1.42      kristaps 1577:                maxargs = 2;
                   1578:                break;
1.1       kristaps 1579:        default:
                   1580:                maxargs = 1;
                   1581:                break;
                   1582:        }
                   1583:
1.46      kristaps 1584:        for (arg = NULL; ; ) {
1.32      kristaps 1585:                la = *pos;
1.119     schwarze 1586:                av = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
1.1       kristaps 1587:
1.56      kristaps 1588:                if (ARGV_WORD == av) {
1.32      kristaps 1589:                        *pos = la;
1.1       kristaps 1590:                        break;
1.131     schwarze 1591:                }
1.1       kristaps 1592:
1.56      kristaps 1593:                if (ARGV_EOLN == av)
1.1       kristaps 1594:                        break;
1.56      kristaps 1595:                if (ARGV_ARG == av)
1.1       kristaps 1596:                        continue;
                   1597:
                   1598:                mdoc_argv_free(arg);
                   1599:                return(0);
                   1600:        }
                   1601:
1.46      kristaps 1602:        for (flushed = j = 0; ; ) {
1.32      kristaps 1603:                la = *pos;
1.119     schwarze 1604:                ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1.1       kristaps 1605:
1.53      kristaps 1606:                if (ARGS_ERROR == ac)
1.1       kristaps 1607:                        return(0);
1.53      kristaps 1608:                if (ARGS_PUNCT == ac)
1.1       kristaps 1609:                        break;
1.53      kristaps 1610:                if (ARGS_EOLN == ac)
1.1       kristaps 1611:                        break;
                   1612:
1.131     schwarze 1613:                if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) &&
                   1614:                    ARGS_QWORD != ac && 0 == j &&
                   1615:                    DELIM_OPEN == mdoc_isdelim(p)) {
1.123     schwarze 1616:                        if ( ! dword(mdoc, line, la, p, DELIM_OPEN, 0))
1.46      kristaps 1617:                                return(0);
                   1618:                        continue;
                   1619:                } else if (0 == j)
1.133     schwarze 1620:                       if ( ! mdoc_elem_alloc(mdoc, line, ppos, tok, arg))
1.46      kristaps 1621:                               return(0);
                   1622:
                   1623:                if (j == maxargs && ! flushed) {
1.119     schwarze 1624:                        if ( ! rew_elem(mdoc, tok))
1.46      kristaps 1625:                                return(0);
                   1626:                        flushed = 1;
                   1627:                }
                   1628:
1.54      kristaps 1629:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1630:
                   1631:                if (MDOC_MAX != ntok) {
1.119     schwarze 1632:                        if ( ! flushed && ! rew_elem(mdoc, tok))
1.1       kristaps 1633:                                return(0);
                   1634:                        flushed = 1;
1.119     schwarze 1635:                        if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1.1       kristaps 1636:                                return(0);
1.46      kristaps 1637:                        j++;
1.1       kristaps 1638:                        break;
                   1639:                }
                   1640:
                   1641:                if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) &&
1.131     schwarze 1642:                    ARGS_QWORD != ac &&
                   1643:                    ! flushed &&
                   1644:                    DELIM_NONE != mdoc_isdelim(p)) {
1.119     schwarze 1645:                        if ( ! rew_elem(mdoc, tok))
1.1       kristaps 1646:                                return(0);
                   1647:                        flushed = 1;
                   1648:                }
1.42      kristaps 1649:
1.123     schwarze 1650:                if ( ! dword(mdoc, line, la, p, DELIM_MAX,
                   1651:                    MDOC_JOIN & mdoc_macros[tok].flags))
1.1       kristaps 1652:                        return(0);
1.46      kristaps 1653:                j++;
1.1       kristaps 1654:        }
                   1655:
1.133     schwarze 1656:        if (0 == j && ! mdoc_elem_alloc(mdoc, line, ppos, tok, arg))
1.46      kristaps 1657:               return(0);
                   1658:
                   1659:        /* Close out in a consistent state. */
1.32      kristaps 1660:
1.119     schwarze 1661:        if ( ! flushed && ! rew_elem(mdoc, tok))
1.1       kristaps 1662:                return(0);
1.60      kristaps 1663:        if ( ! nl)
1.1       kristaps 1664:                return(1);
1.119     schwarze 1665:        return(append_delims(mdoc, line, pos, buf));
1.1       kristaps 1666: }
                   1667:
                   1668: static int
                   1669: in_line_eoln(MACRO_PROT_ARGS)
                   1670: {
1.56      kristaps 1671:        int              la;
1.55      kristaps 1672:        enum margserr    ac;
1.56      kristaps 1673:        enum margverr    av;
1.53      kristaps 1674:        struct mdoc_arg *arg;
                   1675:        char            *p;
                   1676:        enum mdoct       ntok;
1.1       kristaps 1677:
                   1678:        assert( ! (MDOC_PARSED & mdoc_macros[tok].flags));
                   1679:
1.90      schwarze 1680:        if (tok == MDOC_Pp)
1.119     schwarze 1681:                rew_sub(MDOC_BLOCK, mdoc, MDOC_Nm, line, ppos);
1.90      schwarze 1682:
1.32      kristaps 1683:        /* Parse macro arguments. */
1.1       kristaps 1684:
1.32      kristaps 1685:        for (arg = NULL; ; ) {
1.1       kristaps 1686:                la = *pos;
1.119     schwarze 1687:                av = mdoc_argv(mdoc, line, tok, &arg, pos, buf);
1.1       kristaps 1688:
1.56      kristaps 1689:                if (ARGV_WORD == av) {
1.1       kristaps 1690:                        *pos = la;
                   1691:                        break;
                   1692:                }
1.131     schwarze 1693:                if (ARGV_EOLN == av)
1.1       kristaps 1694:                        break;
1.56      kristaps 1695:                if (ARGV_ARG == av)
1.1       kristaps 1696:                        continue;
                   1697:
                   1698:                mdoc_argv_free(arg);
                   1699:                return(0);
                   1700:        }
                   1701:
1.32      kristaps 1702:        /* Open element scope. */
                   1703:
1.119     schwarze 1704:        if ( ! mdoc_elem_alloc(mdoc, line, ppos, tok, arg))
1.1       kristaps 1705:                return(0);
                   1706:
1.32      kristaps 1707:        /* Parse argument terms. */
1.1       kristaps 1708:
                   1709:        for (;;) {
                   1710:                la = *pos;
1.119     schwarze 1711:                ac = mdoc_args(mdoc, line, pos, buf, tok, &p);
1.1       kristaps 1712:
1.53      kristaps 1713:                if (ARGS_ERROR == ac)
1.1       kristaps 1714:                        return(0);
1.53      kristaps 1715:                if (ARGS_EOLN == ac)
1.1       kristaps 1716:                        break;
                   1717:
1.53      kristaps 1718:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1.1       kristaps 1719:
1.53      kristaps 1720:                if (MDOC_MAX == ntok) {
1.123     schwarze 1721:                        if ( ! dword(mdoc, line, la, p, DELIM_MAX,
                   1722:                            MDOC_JOIN & mdoc_macros[tok].flags))
1.1       kristaps 1723:                                return(0);
1.53      kristaps 1724:                        continue;
                   1725:                }
1.1       kristaps 1726:
1.119     schwarze 1727:                if ( ! rew_elem(mdoc, tok))
1.1       kristaps 1728:                        return(0);
1.119     schwarze 1729:                return(mdoc_macro(mdoc, ntok, line, la, pos, buf));
1.1       kristaps 1730:        }
                   1731:
1.32      kristaps 1732:        /* Close out (no delimiters). */
                   1733:
1.119     schwarze 1734:        return(rew_elem(mdoc, tok));
1.1       kristaps 1735: }
                   1736:
                   1737: static int
1.41      kristaps 1738: ctx_synopsis(MACRO_PROT_ARGS)
                   1739: {
1.60      kristaps 1740:        int              nl;
                   1741:
1.119     schwarze 1742:        nl = MDOC_NEWLINE & mdoc->flags;
1.41      kristaps 1743:
                   1744:        /* If we're not in the SYNOPSIS, go straight to in-line. */
1.119     schwarze 1745:        if ( ! (MDOC_SYNOPSIS & mdoc->flags))
                   1746:                return(in_line(mdoc, tok, line, ppos, pos, buf));
1.41      kristaps 1747:
                   1748:        /* If we're a nested call, same place. */
1.60      kristaps 1749:        if ( ! nl)
1.119     schwarze 1750:                return(in_line(mdoc, tok, line, ppos, pos, buf));
1.41      kristaps 1751:
                   1752:        /*
                   1753:         * XXX: this will open a block scope; however, if later we end
                   1754:         * up formatting the block scope, then child nodes will inherit
                   1755:         * the formatting.  Be careful.
                   1756:         */
1.88      schwarze 1757:        if (MDOC_Nm == tok)
1.119     schwarze 1758:                return(blk_full(mdoc, tok, line, ppos, pos, buf));
1.88      schwarze 1759:        assert(MDOC_Vt == tok);
1.119     schwarze 1760:        return(blk_part_imp(mdoc, tok, line, ppos, pos, buf));
1.1       kristaps 1761: }
                   1762:
1.24      kristaps 1763: /*
                   1764:  * Phrases occur within `Bl -column' entries, separated by `Ta' or tabs.
                   1765:  * They're unusual because they're basically free-form text until a
                   1766:  * macro is encountered.
                   1767:  */
1.1       kristaps 1768: static int
1.119     schwarze 1769: phrase(struct mdoc *mdoc, int line, int ppos, char *buf)
1.1       kristaps 1770: {
1.53      kristaps 1771:        int              la, pos;
1.75      kristaps 1772:        enum margserr    ac;
1.53      kristaps 1773:        enum mdoct       ntok;
                   1774:        char            *p;
1.1       kristaps 1775:
1.24      kristaps 1776:        for (pos = ppos; ; ) {
                   1777:                la = pos;
1.1       kristaps 1778:
1.119     schwarze 1779:                ac = mdoc_zargs(mdoc, line, &pos, buf, &p);
1.1       kristaps 1780:
1.75      kristaps 1781:                if (ARGS_ERROR == ac)
1.24      kristaps 1782:                        return(0);
1.75      kristaps 1783:                if (ARGS_EOLN == ac)
1.24      kristaps 1784:                        break;
1.1       kristaps 1785:
1.75      kristaps 1786:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup_raw(p);
1.1       kristaps 1787:
1.53      kristaps 1788:                if (MDOC_MAX == ntok) {
1.123     schwarze 1789:                        if ( ! dword(mdoc, line, la, p, DELIM_MAX, 1))
1.1       kristaps 1790:                                return(0);
1.53      kristaps 1791:                        continue;
                   1792:                }
1.1       kristaps 1793:
1.119     schwarze 1794:                if ( ! mdoc_macro(mdoc, ntok, line, la, &pos, buf))
1.1       kristaps 1795:                        return(0);
1.119     schwarze 1796:                return(append_delims(mdoc, line, &pos, buf));
1.1       kristaps 1797:        }
                   1798:
                   1799:        return(1);
                   1800: }
1.24      kristaps 1801:
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) {
1.137     schwarze 1816:                mandoc_msg(MANDOCERR_TA_STRAY, mdoc->parse,
1.139     schwarze 1817:                    line, ppos, "Ta");
1.121     schwarze 1818:                return(1);
                   1819:        }
1.75      kristaps 1820:
1.121     schwarze 1821:        /* Advance to the next column. */
1.119     schwarze 1822:        if ( ! rew_sub(MDOC_BODY, mdoc, MDOC_It, line, ppos))
1.75      kristaps 1823:                return(0);
1.119     schwarze 1824:        if ( ! mdoc_body_alloc(mdoc, line, ppos, MDOC_It))
1.75      kristaps 1825:                return(0);
                   1826:
                   1827:        for (;;) {
                   1828:                la = *pos;
1.119     schwarze 1829:                ac = mdoc_zargs(mdoc, line, pos, buf, &p);
1.75      kristaps 1830:
                   1831:                if (ARGS_ERROR == ac)
                   1832:                        return(0);
                   1833:                if (ARGS_EOLN == ac)
                   1834:                        break;
                   1835:
                   1836:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup_raw(p);
                   1837:
                   1838:                if (MDOC_MAX == ntok) {
1.123     schwarze 1839:                        if ( ! dword(mdoc, line, la, p, DELIM_MAX,
                   1840:                            MDOC_JOIN & mdoc_macros[tok].flags))
1.75      kristaps 1841:                                return(0);
                   1842:                        continue;
                   1843:                }
                   1844:
1.119     schwarze 1845:                if ( ! mdoc_macro(mdoc, ntok, line, la, pos, buf))
1.75      kristaps 1846:                        return(0);
1.119     schwarze 1847:                return(append_delims(mdoc, line, pos, buf));
1.75      kristaps 1848:        }
                   1849:
                   1850:        return(1);
                   1851: }

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