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Annotation of mandoc/mdoc_macro.c, Revision 1.66

1.66    ! kristaps    1: /*     $Id: mdoc_macro.c,v 1.65 2010/05/15 04:47:38 kristaps Exp $ */
1.1       kristaps    2: /*
1.9       kristaps    3:  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
1.1       kristaps    4:  *
                      5:  * Permission to use, copy, modify, and distribute this software for any
1.8       kristaps    6:  * purpose with or without fee is hereby granted, provided that the above
                      7:  * copyright notice and this permission notice appear in all copies.
1.1       kristaps    8:  *
1.8       kristaps    9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.1       kristaps   16:  */
1.40      kristaps   17: #ifdef HAVE_CONFIG_H
                     18: #include "config.h"
                     19: #endif
                     20:
1.1       kristaps   21: #include <assert.h>
                     22: #include <ctype.h>
                     23: #include <stdlib.h>
                     24: #include <stdio.h>
                     25: #include <string.h>
1.38      kristaps   26: #include <time.h>
1.1       kristaps   27:
                     28: #include "libmdoc.h"
1.64      kristaps   29: #include "libmandoc.h"
1.1       kristaps   30:
1.51      kristaps   31: enum   rew {
                     32:        REWIND_REWIND,
                     33:        REWIND_NOHALT,
                     34:        REWIND_HALT
                     35: };
1.1       kristaps   36:
1.53      kristaps   37: static int             blk_full(MACRO_PROT_ARGS);
                     38: static int             blk_exp_close(MACRO_PROT_ARGS);
                     39: static int             blk_part_exp(MACRO_PROT_ARGS);
                     40: static int             blk_part_imp(MACRO_PROT_ARGS);
                     41: static int             ctx_synopsis(MACRO_PROT_ARGS);
                     42: static int             in_line_eoln(MACRO_PROT_ARGS);
                     43: static int             in_line_argn(MACRO_PROT_ARGS);
                     44: static int             in_line(MACRO_PROT_ARGS);
                     45: static int             obsolete(MACRO_PROT_ARGS);
                     46:
                     47: static int             append_delims(struct mdoc *,
                     48:                                int, int *, char *);
1.58      kristaps   49: static enum mdoct      lookup(enum mdoct, const char *);
1.53      kristaps   50: static enum mdoct      lookup_raw(const char *);
1.59      kristaps   51: static int             phrase(struct mdoc *, int, int,
1.62      kristaps   52:                                char *, enum margserr);
1.53      kristaps   53: static enum mdoct      rew_alt(enum mdoct);
                     54: static int             rew_dobreak(enum mdoct,
                     55:                                const struct mdoc_node *);
                     56: static enum rew        rew_dohalt(enum mdoct, enum mdoc_type,
                     57:                                const struct mdoc_node *);
                     58: static int             rew_elem(struct mdoc *, enum mdoct);
                     59: static int             rew_last(struct mdoc *,
                     60:                                const struct mdoc_node *);
                     61: static int             rew_sub(enum mdoc_type, struct mdoc *,
                     62:                                enum mdoct, int, int);
                     63: static int             swarn(struct mdoc *, enum mdoc_type, int,
                     64:                                int, const struct mdoc_node *);
1.1       kristaps   65:
                     66: const  struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
1.13      kristaps   67:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ap */
1.1       kristaps   68:        { in_line_eoln, MDOC_PROLOGUE }, /* Dd */
                     69:        { in_line_eoln, MDOC_PROLOGUE }, /* Dt */
                     70:        { in_line_eoln, MDOC_PROLOGUE }, /* Os */
                     71:        { blk_full, 0 }, /* Sh */
                     72:        { blk_full, 0 }, /* Ss */
1.21      kristaps   73:        { in_line_eoln, 0 }, /* Pp */
1.1       kristaps   74:        { blk_part_imp, MDOC_PARSED }, /* D1 */
                     75:        { blk_part_imp, MDOC_PARSED }, /* Dl */
                     76:        { blk_full, MDOC_EXPLICIT }, /* Bd */
                     77:        { blk_exp_close, MDOC_EXPLICIT }, /* Ed */
                     78:        { blk_full, MDOC_EXPLICIT }, /* Bl */
                     79:        { blk_exp_close, MDOC_EXPLICIT }, /* El */
                     80:        { blk_full, MDOC_PARSED }, /* It */
                     81:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ad */
1.10      kristaps   82:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* An */
1.1       kristaps   83:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ar */
1.23      kristaps   84:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cd */
1.1       kristaps   85:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cm */
                     86:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Dv */
                     87:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Er */
                     88:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ev */
                     89:        { in_line_eoln, 0 }, /* Ex */
                     90:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fa */
                     91:        { in_line_eoln, 0 }, /* Fd */
                     92:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fl */
                     93:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fn */
1.11      kristaps   94:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ft */
1.1       kristaps   95:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ic */
1.18      kristaps   96:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* In */
1.1       kristaps   97:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Li */
1.19      kristaps   98:        { blk_full, 0 }, /* Nd */
1.1       kristaps   99:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Nm */
                    100:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Op */
                    101:        { obsolete, 0 }, /* Ot */
                    102:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Pa */
                    103:        { in_line_eoln, 0 }, /* Rv */
                    104:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* St */
                    105:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Va */
1.41      kristaps  106:        { ctx_synopsis, MDOC_CALLABLE | MDOC_PARSED }, /* Vt */
1.42      kristaps  107:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Xr */
1.1       kristaps  108:        { in_line_eoln, 0 }, /* %A */
                    109:        { in_line_eoln, 0 }, /* %B */
                    110:        { in_line_eoln, 0 }, /* %D */
                    111:        { in_line_eoln, 0 }, /* %I */
                    112:        { in_line_eoln, 0 }, /* %J */
                    113:        { in_line_eoln, 0 }, /* %N */
                    114:        { in_line_eoln, 0 }, /* %O */
                    115:        { in_line_eoln, 0 }, /* %P */
                    116:        { in_line_eoln, 0 }, /* %R */
                    117:        { in_line_eoln, 0 }, /* %T */
                    118:        { in_line_eoln, 0 }, /* %V */
                    119:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ac */
                    120:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Ao */
                    121:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Aq */
                    122:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* At */
                    123:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Bc */
                    124:        { blk_full, MDOC_EXPLICIT }, /* Bf */
                    125:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Bo */
                    126:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Bq */
                    127:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bsx */
                    128:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bx */
                    129:        { in_line_eoln, 0 }, /* Db */
                    130:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Dc */
                    131:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Do */
                    132:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Dq */
                    133:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ec */
                    134:        { blk_exp_close, MDOC_EXPLICIT }, /* Ef */
                    135:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Em */
                    136:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Eo */
                    137:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Fx */
1.11      kristaps  138:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ms */
1.1       kristaps  139:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* No */
                    140:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ns */
                    141:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Nx */
                    142:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ox */
                    143:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Pc */
1.52      kristaps  144:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_IGNDELIM }, /* Pf */
1.1       kristaps  145:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Po */
                    146:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Pq */
                    147:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Qc */
                    148:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Ql */
                    149:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Qo */
                    150:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Qq */
                    151:        { blk_exp_close, MDOC_EXPLICIT }, /* Re */
                    152:        { blk_full, MDOC_EXPLICIT }, /* Rs */
                    153:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Sc */
                    154:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* So */
                    155:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Sq */
                    156:        { in_line_eoln, 0 }, /* Sm */
                    157:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Sx */
                    158:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Sy */
                    159:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Tn */
                    160:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ux */
                    161:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Xc */
                    162:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Xo */
                    163:        { blk_full, MDOC_EXPLICIT | MDOC_CALLABLE }, /* Fo */
                    164:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Fc */
                    165:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Oo */
                    166:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Oc */
                    167:        { blk_full, MDOC_EXPLICIT }, /* Bk */
                    168:        { blk_exp_close, MDOC_EXPLICIT }, /* Ek */
                    169:        { in_line_eoln, 0 }, /* Bt */
                    170:        { in_line_eoln, 0 }, /* Hf */
                    171:        { obsolete, 0 }, /* Fr */
                    172:        { in_line_eoln, 0 }, /* Ud */
                    173:        { in_line_eoln, 0 }, /* Lb */
1.21      kristaps  174:        { in_line_eoln, 0 }, /* Lp */
1.12      kristaps  175:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Lk */
                    176:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Mt */
1.1       kristaps  177:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Brq */
                    178:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Bro */
                    179:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Brc */
                    180:        { in_line_eoln, 0 }, /* %C */
                    181:        { obsolete, 0 }, /* Es */
                    182:        { obsolete, 0 }, /* En */
                    183:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Dx */
                    184:        { in_line_eoln, 0 }, /* %Q */
1.20      kristaps  185:        { in_line_eoln, 0 }, /* br */
                    186:        { in_line_eoln, 0 }, /* sp */
1.37      kristaps  187:        { in_line_eoln, 0 }, /* %U */
1.1       kristaps  188: };
                    189:
                    190: const  struct mdoc_macro * const mdoc_macros = __mdoc_macros;
                    191:
                    192:
                    193: static int
                    194: swarn(struct mdoc *mdoc, enum mdoc_type type,
                    195:                int line, int pos, const struct mdoc_node *p)
                    196: {
                    197:        const char      *n, *t, *tt;
                    198:
                    199:        n = t = "<root>";
                    200:        tt = "block";
                    201:
                    202:        switch (type) {
                    203:        case (MDOC_BODY):
                    204:                tt = "multi-line";
                    205:                break;
                    206:        case (MDOC_HEAD):
                    207:                tt = "line";
                    208:                break;
                    209:        default:
                    210:                break;
                    211:        }
                    212:
                    213:        switch (p->type) {
                    214:        case (MDOC_BLOCK):
                    215:                n = mdoc_macronames[p->tok];
                    216:                t = "block";
                    217:                break;
                    218:        case (MDOC_BODY):
                    219:                n = mdoc_macronames[p->tok];
                    220:                t = "multi-line";
                    221:                break;
                    222:        case (MDOC_HEAD):
                    223:                n = mdoc_macronames[p->tok];
                    224:                t = "line";
                    225:                break;
                    226:        default:
                    227:                break;
                    228:        }
                    229:
                    230:        if ( ! (MDOC_IGN_SCOPE & mdoc->pflags))
1.16      kristaps  231:                return(mdoc_verr(mdoc, line, pos,
1.1       kristaps  232:                                "%s scope breaks %s scope of %s",
                    233:                                tt, t, n));
1.16      kristaps  234:        return(mdoc_vwarn(mdoc, line, pos,
1.1       kristaps  235:                                "%s scope breaks %s scope of %s",
                    236:                                tt, t, n));
                    237: }
                    238:
                    239:
                    240: /*
                    241:  * This is called at the end of parsing.  It must traverse up the tree,
                    242:  * closing out open [implicit] scopes.  Obviously, open explicit scopes
                    243:  * are errors.
                    244:  */
                    245: int
1.32      kristaps  246: mdoc_macroend(struct mdoc *m)
1.1       kristaps  247: {
                    248:        struct mdoc_node *n;
                    249:
                    250:        /* Scan for open explicit scopes. */
                    251:
1.32      kristaps  252:        n = MDOC_VALID & m->last->flags ?  m->last->parent : m->last;
1.1       kristaps  253:
                    254:        for ( ; n; n = n->parent) {
                    255:                if (MDOC_BLOCK != n->type)
                    256:                        continue;
                    257:                if ( ! (MDOC_EXPLICIT & mdoc_macros[n->tok].flags))
                    258:                        continue;
1.32      kristaps  259:                return(mdoc_nerr(m, n, EOPEN));
1.1       kristaps  260:        }
                    261:
1.32      kristaps  262:        /* Rewind to the first. */
                    263:
                    264:        return(rew_last(m, m->first));
1.1       kristaps  265: }
                    266:
1.32      kristaps  267:
                    268: /*
                    269:  * Look up a macro from within a subsequent context.
                    270:  */
1.53      kristaps  271: static enum mdoct
1.58      kristaps  272: lookup(enum mdoct from, const char *p)
1.28      kristaps  273: {
1.36      kristaps  274:        /* FIXME: make -diag lists be un-PARSED. */
1.28      kristaps  275:
                    276:        if ( ! (MDOC_PARSED & mdoc_macros[from].flags))
                    277:                return(MDOC_MAX);
1.35      kristaps  278:        return(lookup_raw(p));
1.28      kristaps  279: }
                    280:
                    281:
1.32      kristaps  282: /*
                    283:  * Lookup a macro following the initial line macro.
                    284:  */
1.53      kristaps  285: static enum mdoct
1.35      kristaps  286: lookup_raw(const char *p)
1.1       kristaps  287: {
1.58      kristaps  288:        enum mdoct       res;
1.1       kristaps  289:
1.34      kristaps  290:        if (MDOC_MAX == (res = mdoc_hash_find(p)))
1.28      kristaps  291:                return(MDOC_MAX);
                    292:        if (MDOC_CALLABLE & mdoc_macros[res].flags)
1.1       kristaps  293:                return(res);
                    294:        return(MDOC_MAX);
                    295: }
                    296:
                    297:
                    298: static int
1.32      kristaps  299: rew_last(struct mdoc *mdoc, const struct mdoc_node *to)
1.1       kristaps  300: {
                    301:
                    302:        assert(to);
                    303:        mdoc->next = MDOC_NEXT_SIBLING;
                    304:
                    305:        /* LINTED */
                    306:        while (mdoc->last != to) {
                    307:                if ( ! mdoc_valid_post(mdoc))
                    308:                        return(0);
                    309:                if ( ! mdoc_action_post(mdoc))
                    310:                        return(0);
                    311:                mdoc->last = mdoc->last->parent;
                    312:                assert(mdoc->last);
                    313:        }
                    314:
                    315:        if ( ! mdoc_valid_post(mdoc))
                    316:                return(0);
                    317:        return(mdoc_action_post(mdoc));
                    318: }
                    319:
                    320:
1.32      kristaps  321: /*
                    322:  * Return the opening macro of a closing one, e.g., `Ec' has `Eo' as its
                    323:  * matching pair.
                    324:  */
1.47      kristaps  325: static enum mdoct
                    326: rew_alt(enum mdoct tok)
1.1       kristaps  327: {
                    328:        switch (tok) {
                    329:        case (MDOC_Ac):
                    330:                return(MDOC_Ao);
                    331:        case (MDOC_Bc):
                    332:                return(MDOC_Bo);
                    333:        case (MDOC_Brc):
                    334:                return(MDOC_Bro);
                    335:        case (MDOC_Dc):
                    336:                return(MDOC_Do);
                    337:        case (MDOC_Ec):
                    338:                return(MDOC_Eo);
                    339:        case (MDOC_Ed):
                    340:                return(MDOC_Bd);
                    341:        case (MDOC_Ef):
                    342:                return(MDOC_Bf);
                    343:        case (MDOC_Ek):
                    344:                return(MDOC_Bk);
                    345:        case (MDOC_El):
                    346:                return(MDOC_Bl);
                    347:        case (MDOC_Fc):
                    348:                return(MDOC_Fo);
                    349:        case (MDOC_Oc):
                    350:                return(MDOC_Oo);
                    351:        case (MDOC_Pc):
                    352:                return(MDOC_Po);
                    353:        case (MDOC_Qc):
                    354:                return(MDOC_Qo);
                    355:        case (MDOC_Re):
                    356:                return(MDOC_Rs);
                    357:        case (MDOC_Sc):
                    358:                return(MDOC_So);
                    359:        case (MDOC_Xc):
                    360:                return(MDOC_Xo);
                    361:        default:
                    362:                break;
                    363:        }
                    364:        abort();
                    365:        /* NOTREACHED */
                    366: }
                    367:
                    368:
                    369: /*
                    370:  * Rewind rules.  This indicates whether to stop rewinding
                    371:  * (REWIND_HALT) without touching our current scope, stop rewinding and
                    372:  * close our current scope (REWIND_REWIND), or continue (REWIND_NOHALT).
                    373:  * The scope-closing and so on occurs in the various rew_* routines.
                    374:  */
1.51      kristaps  375: static enum rew
1.47      kristaps  376: rew_dohalt(enum mdoct tok, enum mdoc_type type,
                    377:                const struct mdoc_node *p)
1.1       kristaps  378: {
                    379:
                    380:        if (MDOC_ROOT == p->type)
                    381:                return(REWIND_HALT);
                    382:        if (MDOC_VALID & p->flags)
                    383:                return(REWIND_NOHALT);
                    384:
                    385:        switch (tok) {
                    386:        case (MDOC_Aq):
                    387:                /* FALLTHROUGH */
                    388:        case (MDOC_Bq):
                    389:                /* FALLTHROUGH */
                    390:        case (MDOC_Brq):
                    391:                /* FALLTHROUGH */
                    392:        case (MDOC_D1):
                    393:                /* FALLTHROUGH */
                    394:        case (MDOC_Dl):
                    395:                /* FALLTHROUGH */
                    396:        case (MDOC_Dq):
                    397:                /* FALLTHROUGH */
                    398:        case (MDOC_Op):
                    399:                /* FALLTHROUGH */
                    400:        case (MDOC_Pq):
                    401:                /* FALLTHROUGH */
                    402:        case (MDOC_Ql):
                    403:                /* FALLTHROUGH */
                    404:        case (MDOC_Qq):
                    405:                /* FALLTHROUGH */
                    406:        case (MDOC_Sq):
1.41      kristaps  407:                /* FALLTHROUGH */
                    408:        case (MDOC_Vt):
1.1       kristaps  409:                assert(MDOC_TAIL != type);
                    410:                if (type == p->type && tok == p->tok)
                    411:                        return(REWIND_REWIND);
                    412:                break;
                    413:        case (MDOC_It):
                    414:                assert(MDOC_TAIL != type);
                    415:                if (type == p->type && tok == p->tok)
                    416:                        return(REWIND_REWIND);
                    417:                if (MDOC_BODY == p->type && MDOC_Bl == p->tok)
                    418:                        return(REWIND_HALT);
                    419:                break;
                    420:        case (MDOC_Sh):
                    421:                if (type == p->type && tok == p->tok)
                    422:                        return(REWIND_REWIND);
                    423:                break;
1.19      kristaps  424:        case (MDOC_Nd):
                    425:                /* FALLTHROUGH */
1.1       kristaps  426:        case (MDOC_Ss):
                    427:                assert(MDOC_TAIL != type);
                    428:                if (type == p->type && tok == p->tok)
                    429:                        return(REWIND_REWIND);
                    430:                if (MDOC_BODY == p->type && MDOC_Sh == p->tok)
                    431:                        return(REWIND_HALT);
                    432:                break;
                    433:        case (MDOC_Ao):
                    434:                /* FALLTHROUGH */
                    435:        case (MDOC_Bd):
                    436:                /* FALLTHROUGH */
                    437:        case (MDOC_Bf):
                    438:                /* FALLTHROUGH */
                    439:        case (MDOC_Bk):
                    440:                /* FALLTHROUGH */
                    441:        case (MDOC_Bl):
                    442:                /* FALLTHROUGH */
                    443:        case (MDOC_Bo):
                    444:                /* FALLTHROUGH */
                    445:        case (MDOC_Bro):
                    446:                /* FALLTHROUGH */
                    447:        case (MDOC_Do):
                    448:                /* FALLTHROUGH */
                    449:        case (MDOC_Eo):
                    450:                /* FALLTHROUGH */
                    451:        case (MDOC_Fo):
                    452:                /* FALLTHROUGH */
                    453:        case (MDOC_Oo):
                    454:                /* FALLTHROUGH */
                    455:        case (MDOC_Po):
                    456:                /* FALLTHROUGH */
                    457:        case (MDOC_Qo):
                    458:                /* FALLTHROUGH */
                    459:        case (MDOC_Rs):
                    460:                /* FALLTHROUGH */
                    461:        case (MDOC_So):
                    462:                /* FALLTHROUGH */
                    463:        case (MDOC_Xo):
                    464:                if (type == p->type && tok == p->tok)
                    465:                        return(REWIND_REWIND);
                    466:                break;
                    467:        /* Multi-line explicit scope close. */
                    468:        case (MDOC_Ac):
                    469:                /* FALLTHROUGH */
                    470:        case (MDOC_Bc):
                    471:                /* FALLTHROUGH */
                    472:        case (MDOC_Brc):
                    473:                /* FALLTHROUGH */
                    474:        case (MDOC_Dc):
                    475:                /* FALLTHROUGH */
                    476:        case (MDOC_Ec):
                    477:                /* FALLTHROUGH */
                    478:        case (MDOC_Ed):
                    479:                /* FALLTHROUGH */
                    480:        case (MDOC_Ek):
                    481:                /* FALLTHROUGH */
                    482:        case (MDOC_El):
                    483:                /* FALLTHROUGH */
                    484:        case (MDOC_Fc):
                    485:                /* FALLTHROUGH */
                    486:        case (MDOC_Ef):
                    487:                /* FALLTHROUGH */
                    488:        case (MDOC_Oc):
                    489:                /* FALLTHROUGH */
                    490:        case (MDOC_Pc):
                    491:                /* FALLTHROUGH */
                    492:        case (MDOC_Qc):
                    493:                /* FALLTHROUGH */
                    494:        case (MDOC_Re):
                    495:                /* FALLTHROUGH */
                    496:        case (MDOC_Sc):
                    497:                /* FALLTHROUGH */
                    498:        case (MDOC_Xc):
                    499:                if (type == p->type && rew_alt(tok) == p->tok)
                    500:                        return(REWIND_REWIND);
                    501:                break;
                    502:        default:
                    503:                abort();
                    504:                /* NOTREACHED */
                    505:        }
                    506:
                    507:        return(REWIND_NOHALT);
                    508: }
                    509:
                    510:
                    511: /*
                    512:  * See if we can break an encountered scope (the rew_dohalt has returned
                    513:  * REWIND_NOHALT).
                    514:  */
                    515: static int
1.47      kristaps  516: rew_dobreak(enum mdoct tok, const struct mdoc_node *p)
1.1       kristaps  517: {
                    518:
                    519:        assert(MDOC_ROOT != p->type);
                    520:        if (MDOC_ELEM == p->type)
                    521:                return(1);
                    522:        if (MDOC_TEXT == p->type)
                    523:                return(1);
                    524:        if (MDOC_VALID & p->flags)
                    525:                return(1);
                    526:
                    527:        switch (tok) {
                    528:        case (MDOC_It):
                    529:                return(MDOC_It == p->tok);
1.19      kristaps  530:        case (MDOC_Nd):
                    531:                return(MDOC_Nd == p->tok);
1.1       kristaps  532:        case (MDOC_Ss):
                    533:                return(MDOC_Ss == p->tok);
                    534:        case (MDOC_Sh):
1.19      kristaps  535:                if (MDOC_Nd == p->tok)
                    536:                        return(1);
1.1       kristaps  537:                if (MDOC_Ss == p->tok)
                    538:                        return(1);
                    539:                return(MDOC_Sh == p->tok);
                    540:        case (MDOC_El):
                    541:                if (MDOC_It == p->tok)
                    542:                        return(1);
                    543:                break;
                    544:        case (MDOC_Oc):
                    545:                if (MDOC_Op == p->tok)
                    546:                        return(1);
                    547:                break;
                    548:        default:
                    549:                break;
                    550:        }
                    551:
                    552:        if (MDOC_EXPLICIT & mdoc_macros[tok].flags)
                    553:                return(p->tok == rew_alt(tok));
                    554:        else if (MDOC_BLOCK == p->type)
                    555:                return(1);
                    556:
                    557:        return(tok == p->tok);
                    558: }
                    559:
                    560:
                    561: static int
1.47      kristaps  562: rew_elem(struct mdoc *mdoc, enum mdoct tok)
1.1       kristaps  563: {
                    564:        struct mdoc_node *n;
                    565:
                    566:        n = mdoc->last;
                    567:        if (MDOC_ELEM != n->type)
                    568:                n = n->parent;
                    569:        assert(MDOC_ELEM == n->type);
                    570:        assert(tok == n->tok);
                    571:
                    572:        return(rew_last(mdoc, n));
                    573: }
                    574:
                    575:
                    576: static int
1.32      kristaps  577: rew_sub(enum mdoc_type t, struct mdoc *m,
1.47      kristaps  578:                enum mdoct tok, int line, int ppos)
1.1       kristaps  579: {
                    580:        struct mdoc_node *n;
1.51      kristaps  581:        enum rew          c;
1.1       kristaps  582:
                    583:        /* LINTED */
1.32      kristaps  584:        for (n = m->last; n; n = n->parent) {
                    585:                c = rew_dohalt(tok, t, n);
                    586:                if (REWIND_HALT == c) {
                    587:                        if (MDOC_BLOCK != t)
                    588:                                return(1);
                    589:                        if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags))
                    590:                                return(1);
                    591:                        return(mdoc_perr(m, line, ppos, ENOCTX));
                    592:                }
1.1       kristaps  593:                if (REWIND_REWIND == c)
                    594:                        break;
                    595:                else if (rew_dobreak(tok, n))
                    596:                        continue;
1.32      kristaps  597:                if ( ! swarn(m, t, line, ppos, n))
1.1       kristaps  598:                        return(0);
                    599:        }
                    600:
                    601:        assert(n);
1.47      kristaps  602:        if ( ! rew_last(m, n))
                    603:                return(0);
                    604:
                    605: #ifdef UGLY
                    606:        /*
                    607:         * The current block extends an enclosing block beyond a line
                    608:         * break.  Now that the current block ends, close the enclosing
                    609:         * block, too.
                    610:         */
                    611:        if (NULL != (n = n->pending)) {
                    612:                assert(MDOC_HEAD == n->type);
                    613:                if ( ! rew_last(m, n))
                    614:                        return(0);
                    615:                if ( ! mdoc_body_alloc(m, n->line, n->pos, n->tok))
                    616:                        return(0);
                    617:        }
                    618: #endif
                    619:
                    620:        return(1);
1.1       kristaps  621: }
                    622:
                    623:
                    624: static int
1.66    ! kristaps  625: append_delims(struct mdoc *m, int line, int *pos, char *buf)
1.1       kristaps  626: {
1.66    ! kristaps  627:        int              la;
1.55      kristaps  628:        enum margserr    ac;
1.1       kristaps  629:        char            *p;
                    630:
1.66    ! kristaps  631:        if ('\0' == buf[*pos])
1.1       kristaps  632:                return(1);
                    633:
                    634:        for (;;) {
1.66    ! kristaps  635:                la = *pos;
        !           636:                ac = mdoc_zargs(m, line, pos, buf, ARGS_NOWARN, &p);
1.1       kristaps  637:
1.53      kristaps  638:                if (ARGS_ERROR == ac)
1.1       kristaps  639:                        return(0);
1.53      kristaps  640:                else if (ARGS_EOLN == ac)
1.1       kristaps  641:                        break;
1.66    ! kristaps  642:
1.1       kristaps  643:                assert(mdoc_isdelim(p));
1.66    ! kristaps  644:                if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps  645:                        return(0);
1.66    ! kristaps  646:
        !           647:                /*
        !           648:                 * If we encounter end-of-sentence symbols, then trigger
        !           649:                 * the double-space.
        !           650:                 *
        !           651:                 * XXX: it's easy to allow this to propogate outward to
        !           652:                 * the last symbol, such that `. )' will cause the
        !           653:                 * correct double-spacing.  However, (1) groff isn't
        !           654:                 * smart enough to do this and (2) it would require
        !           655:                 * knowing which symbols break this behaviour, for
        !           656:                 * example, `.  ;' shouldn't propogate the double-space.
        !           657:                 */
        !           658:                if (mandoc_eos(p, strlen(p)))
        !           659:                        m->last->flags |= MDOC_EOS;
1.1       kristaps  660:        }
                    661:
                    662:        return(1);
                    663: }
                    664:
                    665:
                    666: /*
                    667:  * Close out block partial/full explicit.
                    668:  */
                    669: static int
                    670: blk_exp_close(MACRO_PROT_ARGS)
                    671: {
1.60      kristaps  672:        int              j, lastarg, maxargs, flushed, nl;
1.55      kristaps  673:        enum margserr    ac;
1.53      kristaps  674:        enum mdoct       ntok;
1.1       kristaps  675:        char            *p;
                    676:
1.60      kristaps  677:        nl = MDOC_NEWLINE & m->flags;
                    678:
1.1       kristaps  679:        switch (tok) {
                    680:        case (MDOC_Ec):
                    681:                maxargs = 1;
                    682:                break;
                    683:        default:
                    684:                maxargs = 0;
                    685:                break;
                    686:        }
                    687:
                    688:        if ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags)) {
1.22      kristaps  689:                if (buf[*pos])
1.32      kristaps  690:                        if ( ! mdoc_pwarn(m, line, ppos, ENOLINE))
1.1       kristaps  691:                                return(0);
1.22      kristaps  692:
1.32      kristaps  693:                if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1.22      kristaps  694:                        return(0);
1.32      kristaps  695:                return(rew_sub(MDOC_BLOCK, m, tok, line, ppos));
1.1       kristaps  696:        }
                    697:
1.32      kristaps  698:        if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1.1       kristaps  699:                return(0);
                    700:
1.32      kristaps  701:        if (maxargs > 0)
                    702:                if ( ! mdoc_tail_alloc(m, line, ppos, rew_alt(tok)))
1.1       kristaps  703:                        return(0);
                    704:
1.27      kristaps  705:        for (flushed = j = 0; ; j++) {
1.1       kristaps  706:                lastarg = *pos;
                    707:
                    708:                if (j == maxargs && ! flushed) {
1.32      kristaps  709:                        if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
1.1       kristaps  710:                                return(0);
                    711:                        flushed = 1;
                    712:                }
                    713:
1.53      kristaps  714:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps  715:
1.53      kristaps  716:                if (ARGS_ERROR == ac)
1.1       kristaps  717:                        return(0);
1.53      kristaps  718:                if (ARGS_PUNCT == ac)
1.1       kristaps  719:                        break;
1.53      kristaps  720:                if (ARGS_EOLN == ac)
1.1       kristaps  721:                        break;
                    722:
1.54      kristaps  723:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                    724:
                    725:                if (MDOC_MAX == ntok) {
                    726:                        if ( ! mdoc_word_alloc(m, line, lastarg, p))
1.1       kristaps  727:                                return(0);
1.54      kristaps  728:                        continue;
                    729:                }
1.1       kristaps  730:
1.54      kristaps  731:                if ( ! flushed) {
                    732:                        if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
                    733:                                return(0);
                    734:                        flushed = 1;
                    735:                }
                    736:                if ( ! mdoc_macro(m, ntok, line, lastarg, pos, buf))
1.1       kristaps  737:                        return(0);
1.54      kristaps  738:                break;
1.1       kristaps  739:        }
                    740:
1.32      kristaps  741:        if ( ! flushed && ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
1.1       kristaps  742:                return(0);
                    743:
1.60      kristaps  744:        if ( ! nl)
1.1       kristaps  745:                return(1);
1.32      kristaps  746:        return(append_delims(m, line, pos, buf));
1.1       kristaps  747: }
                    748:
                    749:
                    750: static int
                    751: in_line(MACRO_PROT_ARGS)
                    752: {
1.60      kristaps  753:        int              la, lastpunct, cnt, d, nc, nl;
1.56      kristaps  754:        enum margverr    av;
1.53      kristaps  755:        enum mdoct       ntok;
1.55      kristaps  756:        enum margserr    ac;
1.53      kristaps  757:        struct mdoc_arg *arg;
                    758:        char            *p;
1.1       kristaps  759:
1.60      kristaps  760:        nl = MDOC_NEWLINE & m->flags;
                    761:
1.4       kristaps  762:        /*
                    763:         * Whether we allow ignored elements (those without content,
                    764:         * usually because of reserved words) to squeak by.
                    765:         */
1.45      kristaps  766:
1.4       kristaps  767:        switch (tok) {
1.26      kristaps  768:        case (MDOC_An):
                    769:                /* FALLTHROUGH */
                    770:        case (MDOC_Ar):
1.4       kristaps  771:                /* FALLTHROUGH */
                    772:        case (MDOC_Fl):
                    773:                /* FALLTHROUGH */
1.12      kristaps  774:        case (MDOC_Lk):
                    775:                /* FALLTHROUGH */
1.26      kristaps  776:        case (MDOC_Nm):
                    777:                /* FALLTHROUGH */
1.25      kristaps  778:        case (MDOC_Pa):
1.4       kristaps  779:                nc = 1;
                    780:                break;
                    781:        default:
                    782:                nc = 0;
                    783:                break;
                    784:        }
                    785:
1.27      kristaps  786:        for (arg = NULL;; ) {
1.1       kristaps  787:                la = *pos;
1.56      kristaps  788:                av = mdoc_argv(m, line, tok, &arg, pos, buf);
1.1       kristaps  789:
1.56      kristaps  790:                if (ARGV_WORD == av) {
1.1       kristaps  791:                        *pos = la;
                    792:                        break;
                    793:                }
1.56      kristaps  794:                if (ARGV_EOLN == av)
1.1       kristaps  795:                        break;
1.56      kristaps  796:                if (ARGV_ARG == av)
1.1       kristaps  797:                        continue;
                    798:
                    799:                mdoc_argv_free(arg);
                    800:                return(0);
                    801:        }
                    802:
1.4       kristaps  803:        for (cnt = 0, lastpunct = 1;; ) {
1.1       kristaps  804:                la = *pos;
1.53      kristaps  805:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps  806:
1.53      kristaps  807:                if (ARGS_ERROR == ac)
1.1       kristaps  808:                        return(0);
1.53      kristaps  809:                if (ARGS_EOLN == ac)
1.1       kristaps  810:                        break;
1.53      kristaps  811:                if (ARGS_PUNCT == ac)
1.1       kristaps  812:                        break;
                    813:
1.53      kristaps  814:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1.1       kristaps  815:
1.4       kristaps  816:                /*
                    817:                 * In this case, we've located a submacro and must
                    818:                 * execute it.  Close out scope, if open.  If no
                    819:                 * elements have been generated, either create one (nc)
                    820:                 * or raise a warning.
                    821:                 */
1.1       kristaps  822:
1.53      kristaps  823:                if (MDOC_MAX != ntok) {
1.32      kristaps  824:                        if (0 == lastpunct && ! rew_elem(m, tok))
1.1       kristaps  825:                                return(0);
1.4       kristaps  826:                        if (nc && 0 == cnt) {
1.32      kristaps  827:                                if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
1.3       kristaps  828:                                        return(0);
1.32      kristaps  829:                                if ( ! rew_last(m, m->last))
1.12      kristaps  830:                                        return(0);
1.7       kristaps  831:                        } else if ( ! nc && 0 == cnt) {
                    832:                                mdoc_argv_free(arg);
1.32      kristaps  833:                                if ( ! mdoc_pwarn(m, line, ppos, EIGNE))
1.3       kristaps  834:                                        return(0);
1.7       kristaps  835:                        }
1.53      kristaps  836:                        if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1.1       kristaps  837:                                return(0);
1.60      kristaps  838:                        if ( ! nl)
1.1       kristaps  839:                                return(1);
1.32      kristaps  840:                        return(append_delims(m, line, pos, buf));
1.29      kristaps  841:                }
1.1       kristaps  842:
1.4       kristaps  843:                /*
                    844:                 * Non-quote-enclosed punctuation.  Set up our scope, if
                    845:                 * a word; rewind the scope, if a delimiter; then append
                    846:                 * the word.
                    847:                 */
1.1       kristaps  848:
1.53      kristaps  849:                d = ARGS_QWORD == ac ? 0 : mdoc_isdelim(p);
1.3       kristaps  850:
1.53      kristaps  851:                if (ARGS_QWORD != ac && d) {
1.32      kristaps  852:                        if (0 == lastpunct && ! rew_elem(m, tok))
1.1       kristaps  853:                                return(0);
                    854:                        lastpunct = 1;
                    855:                } else if (lastpunct) {
1.32      kristaps  856:                        if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
1.1       kristaps  857:                                return(0);
                    858:                        lastpunct = 0;
                    859:                }
                    860:
1.3       kristaps  861:                if ( ! d)
                    862:                        cnt++;
1.32      kristaps  863:                if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps  864:                        return(0);
1.39      kristaps  865:
                    866:                /*
                    867:                 * `Fl' macros have their scope re-opened with each new
                    868:                 * word so that the `-' can be added to each one without
                    869:                 * having to parse out spaces.
                    870:                 */
                    871:                if (0 == lastpunct && MDOC_Fl == tok) {
                    872:                        if ( ! rew_elem(m, tok))
                    873:                                return(0);
                    874:                        lastpunct = 1;
                    875:                }
1.1       kristaps  876:        }
                    877:
1.32      kristaps  878:        if (0 == lastpunct && ! rew_elem(m, tok))
1.1       kristaps  879:                return(0);
1.4       kristaps  880:
                    881:        /*
                    882:         * If no elements have been collected and we're allowed to have
                    883:         * empties (nc), open a scope and close it out.  Otherwise,
                    884:         * raise a warning.
                    885:         */
1.45      kristaps  886:
1.4       kristaps  887:        if (nc && 0 == cnt) {
1.32      kristaps  888:                if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
1.3       kristaps  889:                        return(0);
1.32      kristaps  890:                if ( ! rew_last(m, m->last))
1.12      kristaps  891:                        return(0);
1.7       kristaps  892:        } else if ( ! nc && 0 == cnt) {
                    893:                mdoc_argv_free(arg);
1.32      kristaps  894:                if ( ! mdoc_pwarn(m, line, ppos, EIGNE))
1.3       kristaps  895:                        return(0);
1.7       kristaps  896:        }
1.4       kristaps  897:
1.60      kristaps  898:        if ( ! nl)
1.1       kristaps  899:                return(1);
1.32      kristaps  900:        return(append_delims(m, line, pos, buf));
1.1       kristaps  901: }
                    902:
                    903:
                    904: static int
                    905: blk_full(MACRO_PROT_ARGS)
                    906: {
1.63      kristaps  907:        int               la, nl;
1.1       kristaps  908:        struct mdoc_arg  *arg;
1.45      kristaps  909:        struct mdoc_node *head; /* save of head macro */
1.49      kristaps  910:        struct mdoc_node *body; /* save of body macro */
1.48      kristaps  911: #ifdef UGLY
1.47      kristaps  912:        struct mdoc_node *n;
1.48      kristaps  913: #endif
1.53      kristaps  914:        enum mdoct        ntok;
1.59      kristaps  915:        enum margserr     ac, lac;
1.56      kristaps  916:        enum margverr     av;
1.1       kristaps  917:        char             *p;
                    918:
1.63      kristaps  919:        nl = MDOC_NEWLINE & m->flags;
                    920:
1.45      kristaps  921:        /* Close out prior implicit scope. */
1.19      kristaps  922:
1.1       kristaps  923:        if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)) {
1.32      kristaps  924:                if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1.1       kristaps  925:                        return(0);
1.32      kristaps  926:                if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
1.1       kristaps  927:                        return(0);
                    928:        }
                    929:
1.45      kristaps  930:        /*
                    931:         * This routine accomodates implicitly- and explicitly-scoped
                    932:         * macro openings.  Implicit ones first close out prior scope
                    933:         * (seen above).  Delay opening the head until necessary to
                    934:         * allow leading punctuation to print.  Special consideration
                    935:         * for `It -column', which has phrase-part syntax instead of
                    936:         * regular child nodes.
                    937:         */
                    938:
1.1       kristaps  939:        for (arg = NULL;; ) {
1.45      kristaps  940:                la = *pos;
1.56      kristaps  941:                av = mdoc_argv(m, line, tok, &arg, pos, buf);
1.1       kristaps  942:
1.56      kristaps  943:                if (ARGV_WORD == av) {
1.45      kristaps  944:                        *pos = la;
1.1       kristaps  945:                        break;
                    946:                }
                    947:
1.56      kristaps  948:                if (ARGV_EOLN == av)
1.1       kristaps  949:                        break;
1.56      kristaps  950:                if (ARGV_ARG == av)
1.1       kristaps  951:                        continue;
                    952:
                    953:                mdoc_argv_free(arg);
                    954:                return(0);
                    955:        }
                    956:
1.32      kristaps  957:        if ( ! mdoc_block_alloc(m, line, ppos, tok, arg))
1.1       kristaps  958:                return(0);
                    959:
1.49      kristaps  960:        head = body = NULL;
1.1       kristaps  961:
1.45      kristaps  962:        /*
                    963:         * The `Nd' macro has all arguments in its body: it's a hybrid
                    964:         * of block partial-explicit and full-implicit.  Stupid.
                    965:         */
1.19      kristaps  966:
1.45      kristaps  967:        if (MDOC_Nd == tok) {
                    968:                if ( ! mdoc_head_alloc(m, line, ppos, tok))
                    969:                        return(0);
                    970:                head = m->last;
1.32      kristaps  971:                if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.19      kristaps  972:                        return(0);
1.32      kristaps  973:                if ( ! mdoc_body_alloc(m, line, ppos, tok))
1.19      kristaps  974:                        return(0);
1.49      kristaps  975:                body = m->last;
1.19      kristaps  976:        }
                    977:
1.59      kristaps  978:        ac = ARGS_ERROR;
                    979:
1.62      kristaps  980:        for ( ; ; ) {
1.45      kristaps  981:                la = *pos;
1.59      kristaps  982:                lac = ac;
1.53      kristaps  983:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps  984:
1.53      kristaps  985:                if (ARGS_ERROR == ac)
1.1       kristaps  986:                        return(0);
1.53      kristaps  987:                if (ARGS_EOLN == ac)
1.1       kristaps  988:                        break;
1.45      kristaps  989:
1.65      kristaps  990:                if (ARGS_PEND == ac) {
                    991:                        if (ARGS_PPHRASE == lac)
                    992:                                ac = ARGS_PPHRASE;
                    993:                        else
                    994:                                ac = ARGS_PHRASE;
                    995:                }
                    996:
1.45      kristaps  997:                /* Don't emit leading punct. for phrases. */
                    998:
1.59      kristaps  999:                if (NULL == head &&
                   1000:                                ARGS_PHRASE != ac &&
1.57      kristaps 1001:                                ARGS_PPHRASE != ac &&
1.53      kristaps 1002:                                ARGS_QWORD != ac &&
1.45      kristaps 1003:                                1 == mdoc_isdelim(p)) {
                   1004:                        if ( ! mdoc_word_alloc(m, line, la, p))
                   1005:                                return(0);
                   1006:                        continue;
                   1007:                }
                   1008:
                   1009:                /* Always re-open head for phrases. */
                   1010:
1.59      kristaps 1011:                if (NULL == head ||
                   1012:                                ARGS_PHRASE == ac ||
1.57      kristaps 1013:                                ARGS_PPHRASE == ac) {
1.45      kristaps 1014:                        if ( ! mdoc_head_alloc(m, line, ppos, tok))
                   1015:                                return(0);
                   1016:                        head = m->last;
                   1017:                }
                   1018:
1.65      kristaps 1019:                if (ARGS_PHRASE == ac || ARGS_PPHRASE == ac) {
                   1020:                        if (ARGS_PPHRASE == ac)
                   1021:                                m->flags |= MDOC_PPHRASE;
1.62      kristaps 1022:                        if ( ! phrase(m, line, la, buf, ac))
1.1       kristaps 1023:                                return(0);
1.65      kristaps 1024:                        m->flags &= ~MDOC_PPHRASE;
1.32      kristaps 1025:                        if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.1       kristaps 1026:                                return(0);
                   1027:                        continue;
                   1028:                }
                   1029:
1.54      kristaps 1030:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1031:
                   1032:                if (MDOC_MAX == ntok) {
1.53      kristaps 1033:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps 1034:                                return(0);
1.53      kristaps 1035:                        continue;
1.45      kristaps 1036:                }
1.53      kristaps 1037:
                   1038:                if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1.45      kristaps 1039:                        return(0);
1.53      kristaps 1040:                break;
1.45      kristaps 1041:        }
1.1       kristaps 1042:
1.45      kristaps 1043:        if (NULL == head) {
                   1044:                if ( ! mdoc_head_alloc(m, line, ppos, tok))
1.1       kristaps 1045:                        return(0);
1.45      kristaps 1046:                head = m->last;
1.1       kristaps 1047:        }
                   1048:
1.63      kristaps 1049:        if (nl && ! append_delims(m, line, pos, buf))
1.1       kristaps 1050:                return(0);
1.19      kristaps 1051:
1.49      kristaps 1052:        /* If we've already opened our body, exit now. */
1.45      kristaps 1053:
1.49      kristaps 1054:        if (NULL != body)
1.19      kristaps 1055:                return(1);
                   1056:
1.47      kristaps 1057: #ifdef UGLY
                   1058:        /*
1.49      kristaps 1059:         * If there is an open (i.e., unvalidated) sub-block requiring
                   1060:         * explicit close-out, postpone switching the current block from
                   1061:         * head to body until the rew_sub() call closing out that
                   1062:         * sub-block.
1.47      kristaps 1063:         */
                   1064:        for (n = m->last; n && n != head; n = n->parent) {
1.49      kristaps 1065:                if (MDOC_BLOCK == n->type &&
                   1066:                                MDOC_EXPLICIT & mdoc_macros[n->tok].flags &&
                   1067:                                ! (MDOC_VALID & n->flags)) {
                   1068:                        assert( ! (MDOC_ACTED & n->flags));
1.47      kristaps 1069:                        n->pending = head;
                   1070:                        return(1);
                   1071:                }
                   1072:        }
                   1073: #endif
                   1074:
1.45      kristaps 1075:        /* Close out scopes to remain in a consistent state. */
                   1076:
1.32      kristaps 1077:        if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.1       kristaps 1078:                return(0);
1.32      kristaps 1079:        if ( ! mdoc_body_alloc(m, line, ppos, tok))
1.1       kristaps 1080:                return(0);
                   1081:
                   1082:        return(1);
                   1083: }
                   1084:
                   1085:
                   1086: static int
                   1087: blk_part_imp(MACRO_PROT_ARGS)
                   1088: {
1.63      kristaps 1089:        int               la, nl;
1.53      kristaps 1090:        enum mdoct        ntok;
1.55      kristaps 1091:        enum margserr     ac;
1.1       kristaps 1092:        char             *p;
1.43      kristaps 1093:        struct mdoc_node *blk; /* saved block context */
                   1094:        struct mdoc_node *body; /* saved body context */
                   1095:        struct mdoc_node *n;
1.1       kristaps 1096:
1.63      kristaps 1097:        nl = MDOC_NEWLINE & m->flags;
                   1098:
1.43      kristaps 1099:        /*
                   1100:         * A macro that spans to the end of the line.  This is generally
                   1101:         * (but not necessarily) called as the first macro.  The block
                   1102:         * has a head as the immediate child, which is always empty,
                   1103:         * followed by zero or more opening punctuation nodes, then the
                   1104:         * body (which may be empty, depending on the macro), then zero
                   1105:         * or more closing punctuation nodes.
                   1106:         */
1.32      kristaps 1107:
                   1108:        if ( ! mdoc_block_alloc(m, line, ppos, tok, NULL))
                   1109:                return(0);
1.43      kristaps 1110:
1.32      kristaps 1111:        blk = m->last;
1.43      kristaps 1112:
1.32      kristaps 1113:        if ( ! mdoc_head_alloc(m, line, ppos, tok))
1.1       kristaps 1114:                return(0);
1.32      kristaps 1115:        if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.1       kristaps 1116:                return(0);
                   1117:
1.43      kristaps 1118:        /*
                   1119:         * Open the body scope "on-demand", that is, after we've
                   1120:         * processed all our the leading delimiters (open parenthesis,
                   1121:         * etc.).
                   1122:         */
1.1       kristaps 1123:
1.43      kristaps 1124:        for (body = NULL; ; ) {
1.32      kristaps 1125:                la = *pos;
1.53      kristaps 1126:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.43      kristaps 1127:
1.53      kristaps 1128:                if (ARGS_ERROR == ac)
1.1       kristaps 1129:                        return(0);
1.53      kristaps 1130:                if (ARGS_EOLN == ac)
1.43      kristaps 1131:                        break;
1.53      kristaps 1132:                if (ARGS_PUNCT == ac)
1.1       kristaps 1133:                        break;
                   1134:
1.53      kristaps 1135:                if (NULL == body && ARGS_QWORD != ac &&
1.50      kristaps 1136:                                1 == mdoc_isdelim(p)) {
1.32      kristaps 1137:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps 1138:                                return(0);
                   1139:                        continue;
                   1140:                }
                   1141:
1.43      kristaps 1142:                if (NULL == body) {
                   1143:                       if ( ! mdoc_body_alloc(m, line, ppos, tok))
                   1144:                               return(0);
                   1145:                        body = m->last;
                   1146:                }
                   1147:
1.54      kristaps 1148:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1149:
                   1150:                if (MDOC_MAX == ntok) {
1.53      kristaps 1151:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.43      kristaps 1152:                                return(0);
1.53      kristaps 1153:                        continue;
                   1154:                }
1.43      kristaps 1155:
1.53      kristaps 1156:                if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1.1       kristaps 1157:                        return(0);
1.53      kristaps 1158:                break;
1.1       kristaps 1159:        }
                   1160:
1.43      kristaps 1161:        /* Clean-ups to leave in a consistent state. */
                   1162:
1.44      kristaps 1163:        if (NULL == body) {
                   1164:                if ( ! mdoc_body_alloc(m, line, ppos, tok))
                   1165:                        return(0);
                   1166:                body = m->last;
1.64      kristaps 1167:        }
                   1168:
                   1169:        for (n = body->child; n && n->next; n = n->next)
                   1170:                /* Do nothing. */ ;
                   1171:
                   1172:        /*
                   1173:         * End of sentence spacing: if the last node is a text node and
                   1174:         * has a trailing period, then mark it as being end-of-sentence.
                   1175:         */
                   1176:
                   1177:        if (n && MDOC_TEXT == n->type && n->string)
                   1178:                if (mandoc_eos(n->string, strlen(n->string)))
                   1179:                        n->flags |= MDOC_EOS;
                   1180:
                   1181:        /* Up-propogate the end-of-space flag. */
                   1182:
                   1183:        if (n && (MDOC_EOS & n->flags)) {
                   1184:                body->flags |= MDOC_EOS;
                   1185:                body->parent->flags |= MDOC_EOS;
1.44      kristaps 1186:        }
1.43      kristaps 1187:
1.32      kristaps 1188:        /*
                   1189:         * If we can't rewind to our body, then our scope has already
                   1190:         * been closed by another macro (like `Oc' closing `Op').  This
                   1191:         * is ugly behaviour nodding its head to OpenBSD's overwhelming
1.47      kristaps 1192:         * crufty use of `Op' breakage.
1.63      kristaps 1193:         *
                   1194:         * FIXME - this should be ifdef'd OpenBSD?
1.1       kristaps 1195:         */
1.32      kristaps 1196:        for (n = m->last; n; n = n->parent)
1.1       kristaps 1197:                if (body == n)
                   1198:                        break;
1.43      kristaps 1199:
1.32      kristaps 1200:        if (NULL == n && ! mdoc_nwarn(m, body, EIMPBRK))
                   1201:                return(0);
1.43      kristaps 1202:
1.32      kristaps 1203:        if (n && ! rew_last(m, body))
                   1204:                return(0);
1.1       kristaps 1205:
1.32      kristaps 1206:        /* Standard appending of delimiters. */
1.1       kristaps 1207:
1.63      kristaps 1208:        if (nl && ! append_delims(m, line, pos, buf))
1.1       kristaps 1209:                return(0);
                   1210:
1.32      kristaps 1211:        /* Rewind scope, if applicable. */
1.1       kristaps 1212:
1.32      kristaps 1213:        if (n && ! rew_last(m, blk))
1.1       kristaps 1214:                return(0);
                   1215:
                   1216:        return(1);
                   1217: }
                   1218:
                   1219:
                   1220: static int
                   1221: blk_part_exp(MACRO_PROT_ARGS)
                   1222: {
1.60      kristaps 1223:        int               la, nl;
1.55      kristaps 1224:        enum margserr     ac;
1.43      kristaps 1225:        struct mdoc_node *head; /* keep track of head */
                   1226:        struct mdoc_node *body; /* keep track of body */
1.1       kristaps 1227:        char             *p;
1.53      kristaps 1228:        enum mdoct        ntok;
1.1       kristaps 1229:
1.60      kristaps 1230:        nl = MDOC_NEWLINE & m->flags;
                   1231:
1.43      kristaps 1232:        /*
                   1233:         * The opening of an explicit macro having zero or more leading
                   1234:         * punctuation nodes; a head with optional single element (the
                   1235:         * case of `Eo'); and a body that may be empty.
                   1236:         */
1.32      kristaps 1237:
                   1238:        if ( ! mdoc_block_alloc(m, line, ppos, tok, NULL))
1.1       kristaps 1239:                return(0);
1.32      kristaps 1240:
1.43      kristaps 1241:        for (head = body = NULL; ; ) {
1.32      kristaps 1242:                la = *pos;
1.53      kristaps 1243:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps 1244:
1.53      kristaps 1245:                if (ARGS_ERROR == ac)
1.1       kristaps 1246:                        return(0);
1.53      kristaps 1247:                if (ARGS_PUNCT == ac)
1.1       kristaps 1248:                        break;
1.53      kristaps 1249:                if (ARGS_EOLN == ac)
1.1       kristaps 1250:                        break;
1.43      kristaps 1251:
                   1252:                /* Flush out leading punctuation. */
                   1253:
1.53      kristaps 1254:                if (NULL == head && ARGS_QWORD != ac &&
1.50      kristaps 1255:                                1 == mdoc_isdelim(p)) {
1.43      kristaps 1256:                        assert(NULL == body);
                   1257:                        if ( ! mdoc_word_alloc(m, line, la, p))
                   1258:                                return(0);
                   1259:                        continue;
                   1260:                }
                   1261:
                   1262:                if (NULL == head) {
                   1263:                        assert(NULL == body);
                   1264:                        if ( ! mdoc_head_alloc(m, line, ppos, tok))
1.1       kristaps 1265:                                return(0);
1.43      kristaps 1266:                        head = m->last;
1.1       kristaps 1267:                }
                   1268:
1.43      kristaps 1269:                /*
                   1270:                 * `Eo' gobbles any data into the head, but most other
                   1271:                 * macros just immediately close out and begin the body.
                   1272:                 */
                   1273:
                   1274:                if (NULL == body) {
                   1275:                        assert(head);
                   1276:                        /* No check whether it's a macro! */
                   1277:                        if (MDOC_Eo == tok)
                   1278:                                if ( ! mdoc_word_alloc(m, line, la, p))
                   1279:                                        return(0);
                   1280:
1.32      kristaps 1281:                        if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.1       kristaps 1282:                                return(0);
1.32      kristaps 1283:                        if ( ! mdoc_body_alloc(m, line, ppos, tok))
1.1       kristaps 1284:                                return(0);
1.43      kristaps 1285:                        body = m->last;
                   1286:
                   1287:                        if (MDOC_Eo == tok)
                   1288:                                continue;
1.1       kristaps 1289:                }
1.43      kristaps 1290:
                   1291:                assert(NULL != head && NULL != body);
                   1292:
1.54      kristaps 1293:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1294:
                   1295:                if (MDOC_MAX == ntok) {
1.53      kristaps 1296:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.43      kristaps 1297:                                return(0);
1.53      kristaps 1298:                        continue;
1.43      kristaps 1299:                }
                   1300:
1.53      kristaps 1301:                if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1.1       kristaps 1302:                        return(0);
1.53      kristaps 1303:                break;
1.1       kristaps 1304:        }
                   1305:
1.43      kristaps 1306:        /* Clean-up to leave in a consistent state. */
1.32      kristaps 1307:
1.43      kristaps 1308:        if (NULL == head) {
                   1309:                if ( ! mdoc_head_alloc(m, line, ppos, tok))
                   1310:                        return(0);
                   1311:                head = m->last;
                   1312:        }
                   1313:
                   1314:        if (NULL == body) {
1.32      kristaps 1315:                if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.1       kristaps 1316:                        return(0);
1.32      kristaps 1317:                if ( ! mdoc_body_alloc(m, line, ppos, tok))
1.1       kristaps 1318:                        return(0);
1.43      kristaps 1319:                body = m->last;
1.1       kristaps 1320:        }
                   1321:
1.32      kristaps 1322:        /* Standard appending of delimiters. */
                   1323:
1.60      kristaps 1324:        if ( ! nl)
1.1       kristaps 1325:                return(1);
1.32      kristaps 1326:        return(append_delims(m, line, pos, buf));
1.1       kristaps 1327: }
                   1328:
                   1329:
1.61      kristaps 1330: /* ARGSUSED */
1.1       kristaps 1331: static int
                   1332: in_line_argn(MACRO_PROT_ARGS)
                   1333: {
1.60      kristaps 1334:        int              la, flushed, j, maxargs, nl;
1.55      kristaps 1335:        enum margserr    ac;
1.56      kristaps 1336:        enum margverr    av;
1.53      kristaps 1337:        struct mdoc_arg *arg;
                   1338:        char            *p;
                   1339:        enum mdoct       ntok;
1.1       kristaps 1340:
1.60      kristaps 1341:        nl = MDOC_NEWLINE & m->flags;
                   1342:
1.46      kristaps 1343:        /*
                   1344:         * A line macro that has a fixed number of arguments (maxargs).
                   1345:         * Only open the scope once the first non-leading-punctuation is
                   1346:         * found (unless MDOC_IGNDELIM is noted, like in `Pf'), then
                   1347:         * keep it open until the maximum number of arguments are
                   1348:         * exhausted.
                   1349:         */
1.1       kristaps 1350:
                   1351:        switch (tok) {
                   1352:        case (MDOC_Ap):
                   1353:                /* FALLTHROUGH */
                   1354:        case (MDOC_No):
                   1355:                /* FALLTHROUGH */
                   1356:        case (MDOC_Ns):
                   1357:                /* FALLTHROUGH */
                   1358:        case (MDOC_Ux):
                   1359:                maxargs = 0;
                   1360:                break;
1.42      kristaps 1361:        case (MDOC_Xr):
                   1362:                maxargs = 2;
                   1363:                break;
1.1       kristaps 1364:        default:
                   1365:                maxargs = 1;
                   1366:                break;
                   1367:        }
                   1368:
1.46      kristaps 1369:        for (arg = NULL; ; ) {
1.32      kristaps 1370:                la = *pos;
1.56      kristaps 1371:                av = mdoc_argv(m, line, tok, &arg, pos, buf);
1.1       kristaps 1372:
1.56      kristaps 1373:                if (ARGV_WORD == av) {
1.32      kristaps 1374:                        *pos = la;
1.1       kristaps 1375:                        break;
                   1376:                }
                   1377:
1.56      kristaps 1378:                if (ARGV_EOLN == av)
1.1       kristaps 1379:                        break;
1.56      kristaps 1380:                if (ARGV_ARG == av)
1.1       kristaps 1381:                        continue;
                   1382:
                   1383:                mdoc_argv_free(arg);
                   1384:                return(0);
                   1385:        }
                   1386:
1.46      kristaps 1387:        for (flushed = j = 0; ; ) {
1.32      kristaps 1388:                la = *pos;
1.53      kristaps 1389:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps 1390:
1.53      kristaps 1391:                if (ARGS_ERROR == ac)
1.1       kristaps 1392:                        return(0);
1.53      kristaps 1393:                if (ARGS_PUNCT == ac)
1.1       kristaps 1394:                        break;
1.53      kristaps 1395:                if (ARGS_EOLN == ac)
1.1       kristaps 1396:                        break;
                   1397:
1.46      kristaps 1398:                if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) &&
1.53      kristaps 1399:                                ARGS_QWORD != ac &&
1.46      kristaps 1400:                                0 == j && 1 == mdoc_isdelim(p)) {
                   1401:                        if ( ! mdoc_word_alloc(m, line, la, p))
                   1402:                                return(0);
                   1403:                        continue;
                   1404:                } else if (0 == j)
                   1405:                       if ( ! mdoc_elem_alloc(m, line, la, tok, arg))
                   1406:                               return(0);
                   1407:
                   1408:                if (j == maxargs && ! flushed) {
                   1409:                        if ( ! rew_elem(m, tok))
                   1410:                                return(0);
                   1411:                        flushed = 1;
                   1412:                }
                   1413:
1.54      kristaps 1414:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1415:
                   1416:                if (MDOC_MAX != ntok) {
1.32      kristaps 1417:                        if ( ! flushed && ! rew_elem(m, tok))
1.1       kristaps 1418:                                return(0);
                   1419:                        flushed = 1;
1.53      kristaps 1420:                        if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1.1       kristaps 1421:                                return(0);
1.46      kristaps 1422:                        j++;
1.1       kristaps 1423:                        break;
                   1424:                }
                   1425:
                   1426:                if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) &&
1.53      kristaps 1427:                                ARGS_QWORD != ac &&
1.1       kristaps 1428:                                ! flushed && mdoc_isdelim(p)) {
1.32      kristaps 1429:                        if ( ! rew_elem(m, tok))
1.1       kristaps 1430:                                return(0);
                   1431:                        flushed = 1;
                   1432:                }
1.42      kristaps 1433:
                   1434:                /*
                   1435:                 * XXX: this is a hack to work around groff's ugliness
                   1436:                 * as regards `Xr' and extraneous arguments.  It should
                   1437:                 * ideally be deprecated behaviour, but because this is
                   1438:                 * code is no here, it's unlikely to be removed.
                   1439:                 */
1.43      kristaps 1440:
1.46      kristaps 1441: #ifdef __OpenBSD__
1.42      kristaps 1442:                if (MDOC_Xr == tok && j == maxargs) {
1.46      kristaps 1443:                        if ( ! mdoc_elem_alloc(m, line, la, MDOC_Ns, NULL))
1.42      kristaps 1444:                                return(0);
                   1445:                        if ( ! rew_elem(m, MDOC_Ns))
                   1446:                                return(0);
                   1447:                }
1.46      kristaps 1448: #endif
1.42      kristaps 1449:
1.32      kristaps 1450:                if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps 1451:                        return(0);
1.46      kristaps 1452:                j++;
1.1       kristaps 1453:        }
                   1454:
1.46      kristaps 1455:        if (0 == j && ! mdoc_elem_alloc(m, line, la, tok, arg))
                   1456:               return(0);
                   1457:
                   1458:        /* Close out in a consistent state. */
1.32      kristaps 1459:
                   1460:        if ( ! flushed && ! rew_elem(m, tok))
1.1       kristaps 1461:                return(0);
1.60      kristaps 1462:        if ( ! nl)
1.1       kristaps 1463:                return(1);
1.32      kristaps 1464:        return(append_delims(m, line, pos, buf));
1.1       kristaps 1465: }
                   1466:
                   1467:
                   1468: static int
                   1469: in_line_eoln(MACRO_PROT_ARGS)
                   1470: {
1.56      kristaps 1471:        int              la;
1.55      kristaps 1472:        enum margserr    ac;
1.56      kristaps 1473:        enum margverr    av;
1.53      kristaps 1474:        struct mdoc_arg *arg;
                   1475:        char            *p;
                   1476:        enum mdoct       ntok;
1.1       kristaps 1477:
                   1478:        assert( ! (MDOC_PARSED & mdoc_macros[tok].flags));
                   1479:
1.32      kristaps 1480:        /* Parse macro arguments. */
1.1       kristaps 1481:
1.32      kristaps 1482:        for (arg = NULL; ; ) {
1.1       kristaps 1483:                la = *pos;
1.56      kristaps 1484:                av = mdoc_argv(m, line, tok, &arg, pos, buf);
1.1       kristaps 1485:
1.56      kristaps 1486:                if (ARGV_WORD == av) {
1.1       kristaps 1487:                        *pos = la;
                   1488:                        break;
                   1489:                }
1.56      kristaps 1490:                if (ARGV_EOLN == av)
1.1       kristaps 1491:                        break;
1.56      kristaps 1492:                if (ARGV_ARG == av)
1.1       kristaps 1493:                        continue;
                   1494:
                   1495:                mdoc_argv_free(arg);
                   1496:                return(0);
                   1497:        }
                   1498:
1.32      kristaps 1499:        /* Open element scope. */
                   1500:
                   1501:        if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
1.1       kristaps 1502:                return(0);
                   1503:
1.32      kristaps 1504:        /* Parse argument terms. */
1.1       kristaps 1505:
                   1506:        for (;;) {
                   1507:                la = *pos;
1.53      kristaps 1508:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps 1509:
1.53      kristaps 1510:                if (ARGS_ERROR == ac)
1.1       kristaps 1511:                        return(0);
1.53      kristaps 1512:                if (ARGS_EOLN == ac)
1.1       kristaps 1513:                        break;
                   1514:
1.53      kristaps 1515:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1.1       kristaps 1516:
1.53      kristaps 1517:                if (MDOC_MAX == ntok) {
                   1518:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps 1519:                                return(0);
1.53      kristaps 1520:                        continue;
                   1521:                }
1.1       kristaps 1522:
1.53      kristaps 1523:                if ( ! rew_elem(m, tok))
1.1       kristaps 1524:                        return(0);
1.53      kristaps 1525:                return(mdoc_macro(m, ntok, line, la, pos, buf));
1.1       kristaps 1526:        }
                   1527:
1.32      kristaps 1528:        /* Close out (no delimiters). */
                   1529:
                   1530:        return(rew_elem(m, tok));
1.1       kristaps 1531: }
                   1532:
                   1533:
                   1534: /* ARGSUSED */
                   1535: static int
1.41      kristaps 1536: ctx_synopsis(MACRO_PROT_ARGS)
                   1537: {
1.60      kristaps 1538:        int              nl;
                   1539:
                   1540:        nl = MDOC_NEWLINE & m->flags;
1.41      kristaps 1541:
                   1542:        /* If we're not in the SYNOPSIS, go straight to in-line. */
                   1543:        if (SEC_SYNOPSIS != m->lastsec)
                   1544:                return(in_line(m, tok, line, ppos, pos, buf));
                   1545:
                   1546:        /* If we're a nested call, same place. */
1.60      kristaps 1547:        if ( ! nl)
1.41      kristaps 1548:                return(in_line(m, tok, line, ppos, pos, buf));
                   1549:
                   1550:        /*
                   1551:         * XXX: this will open a block scope; however, if later we end
                   1552:         * up formatting the block scope, then child nodes will inherit
                   1553:         * the formatting.  Be careful.
                   1554:         */
                   1555:
                   1556:        return(blk_part_imp(m, tok, line, ppos, pos, buf));
                   1557: }
                   1558:
                   1559:
                   1560: /* ARGSUSED */
                   1561: static int
1.1       kristaps 1562: obsolete(MACRO_PROT_ARGS)
                   1563: {
                   1564:
1.32      kristaps 1565:        return(mdoc_pwarn(m, line, ppos, EOBS));
1.1       kristaps 1566: }
                   1567:
                   1568:
1.24      kristaps 1569: /*
                   1570:  * Phrases occur within `Bl -column' entries, separated by `Ta' or tabs.
                   1571:  * They're unusual because they're basically free-form text until a
                   1572:  * macro is encountered.
                   1573:  */
1.1       kristaps 1574: static int
1.62      kristaps 1575: phrase(struct mdoc *m, int line, int ppos, char *buf, enum margserr ac)
1.1       kristaps 1576: {
1.53      kristaps 1577:        int              la, pos;
1.59      kristaps 1578:        enum margserr    aac;
1.53      kristaps 1579:        enum mdoct       ntok;
                   1580:        char            *p;
1.1       kristaps 1581:
1.65      kristaps 1582:        assert(ARGS_PHRASE == ac || ARGS_PPHRASE == ac);
1.59      kristaps 1583:
1.24      kristaps 1584:        for (pos = ppos; ; ) {
                   1585:                la = pos;
1.1       kristaps 1586:
1.65      kristaps 1587:                aac = mdoc_zargs(m, line, &pos, buf, 0, &p);
1.1       kristaps 1588:
1.59      kristaps 1589:                if (ARGS_ERROR == aac)
1.24      kristaps 1590:                        return(0);
1.59      kristaps 1591:                if (ARGS_EOLN == aac)
1.24      kristaps 1592:                        break;
1.1       kristaps 1593:
1.65      kristaps 1594:                ntok = ARGS_QWORD == aac ? MDOC_MAX : lookup_raw(p);
1.1       kristaps 1595:
1.53      kristaps 1596:                if (MDOC_MAX == ntok) {
                   1597:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps 1598:                                return(0);
1.53      kristaps 1599:                        continue;
                   1600:                }
1.1       kristaps 1601:
1.53      kristaps 1602:                if ( ! mdoc_macro(m, ntok, line, la, &pos, buf))
1.1       kristaps 1603:                        return(0);
1.53      kristaps 1604:                return(append_delims(m, line, &pos, buf));
1.1       kristaps 1605:        }
                   1606:
                   1607:        return(1);
                   1608: }
1.24      kristaps 1609:
                   1610:

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