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Annotation of mandoc/mdoc_macro.c, Revision 1.59

1.59    ! kristaps    1: /*     $Id: mdoc_macro.c,v 1.58 2010/05/08 07:30:19 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"
                     29:
1.51      kristaps   30: enum   rew {
                     31:        REWIND_REWIND,
                     32:        REWIND_NOHALT,
                     33:        REWIND_HALT
                     34: };
1.1       kristaps   35:
1.53      kristaps   36: static int             blk_full(MACRO_PROT_ARGS);
                     37: static int             blk_exp_close(MACRO_PROT_ARGS);
                     38: static int             blk_part_exp(MACRO_PROT_ARGS);
                     39: static int             blk_part_imp(MACRO_PROT_ARGS);
                     40: static int             ctx_synopsis(MACRO_PROT_ARGS);
                     41: static int             in_line_eoln(MACRO_PROT_ARGS);
                     42: static int             in_line_argn(MACRO_PROT_ARGS);
                     43: static int             in_line(MACRO_PROT_ARGS);
                     44: static int             obsolete(MACRO_PROT_ARGS);
                     45:
                     46: static int             append_delims(struct mdoc *,
                     47:                                int, int *, char *);
1.58      kristaps   48: static enum mdoct      lookup(enum mdoct, const char *);
1.53      kristaps   49: static enum mdoct      lookup_raw(const char *);
1.59    ! kristaps   50: static int             phrase(struct mdoc *, int, int,
        !            51:                                char *, enum margserr, int);
1.53      kristaps   52: static enum mdoct      rew_alt(enum mdoct);
                     53: static int             rew_dobreak(enum mdoct,
                     54:                                const struct mdoc_node *);
                     55: static enum rew        rew_dohalt(enum mdoct, enum mdoc_type,
                     56:                                const struct mdoc_node *);
                     57: static int             rew_elem(struct mdoc *, enum mdoct);
                     58: static int             rew_last(struct mdoc *,
                     59:                                const struct mdoc_node *);
                     60: static int             rew_sub(enum mdoc_type, struct mdoc *,
                     61:                                enum mdoct, int, int);
                     62: static int             swarn(struct mdoc *, enum mdoc_type, int,
                     63:                                int, const struct mdoc_node *);
1.1       kristaps   64:
                     65: const  struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
1.13      kristaps   66:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ap */
1.1       kristaps   67:        { in_line_eoln, MDOC_PROLOGUE }, /* Dd */
                     68:        { in_line_eoln, MDOC_PROLOGUE }, /* Dt */
                     69:        { in_line_eoln, MDOC_PROLOGUE }, /* Os */
                     70:        { blk_full, 0 }, /* Sh */
                     71:        { blk_full, 0 }, /* Ss */
1.21      kristaps   72:        { in_line_eoln, 0 }, /* Pp */
1.1       kristaps   73:        { blk_part_imp, MDOC_PARSED }, /* D1 */
                     74:        { blk_part_imp, MDOC_PARSED }, /* Dl */
                     75:        { blk_full, MDOC_EXPLICIT }, /* Bd */
                     76:        { blk_exp_close, MDOC_EXPLICIT }, /* Ed */
                     77:        { blk_full, MDOC_EXPLICIT }, /* Bl */
                     78:        { blk_exp_close, MDOC_EXPLICIT }, /* El */
                     79:        { blk_full, MDOC_PARSED }, /* It */
                     80:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ad */
1.10      kristaps   81:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* An */
1.1       kristaps   82:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ar */
1.23      kristaps   83:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cd */
1.1       kristaps   84:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cm */
                     85:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Dv */
                     86:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Er */
                     87:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ev */
                     88:        { in_line_eoln, 0 }, /* Ex */
                     89:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fa */
                     90:        { in_line_eoln, 0 }, /* Fd */
                     91:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fl */
                     92:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fn */
1.11      kristaps   93:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ft */
1.1       kristaps   94:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ic */
1.18      kristaps   95:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* In */
1.1       kristaps   96:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Li */
1.19      kristaps   97:        { blk_full, 0 }, /* Nd */
1.1       kristaps   98:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Nm */
                     99:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Op */
                    100:        { obsolete, 0 }, /* Ot */
                    101:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Pa */
                    102:        { in_line_eoln, 0 }, /* Rv */
                    103:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* St */
                    104:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Va */
1.41      kristaps  105:        { ctx_synopsis, MDOC_CALLABLE | MDOC_PARSED }, /* Vt */
1.42      kristaps  106:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Xr */
1.1       kristaps  107:        { in_line_eoln, 0 }, /* %A */
                    108:        { in_line_eoln, 0 }, /* %B */
                    109:        { in_line_eoln, 0 }, /* %D */
                    110:        { in_line_eoln, 0 }, /* %I */
                    111:        { in_line_eoln, 0 }, /* %J */
                    112:        { in_line_eoln, 0 }, /* %N */
                    113:        { in_line_eoln, 0 }, /* %O */
                    114:        { in_line_eoln, 0 }, /* %P */
                    115:        { in_line_eoln, 0 }, /* %R */
                    116:        { in_line_eoln, 0 }, /* %T */
                    117:        { in_line_eoln, 0 }, /* %V */
                    118:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ac */
                    119:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Ao */
                    120:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Aq */
                    121:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* At */
                    122:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Bc */
                    123:        { blk_full, MDOC_EXPLICIT }, /* Bf */
                    124:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Bo */
                    125:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Bq */
                    126:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bsx */
                    127:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bx */
                    128:        { in_line_eoln, 0 }, /* Db */
                    129:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Dc */
                    130:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Do */
                    131:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Dq */
                    132:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ec */
                    133:        { blk_exp_close, MDOC_EXPLICIT }, /* Ef */
                    134:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Em */
                    135:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Eo */
                    136:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Fx */
1.11      kristaps  137:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ms */
1.1       kristaps  138:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* No */
                    139:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ns */
                    140:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Nx */
                    141:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ox */
                    142:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Pc */
1.52      kristaps  143:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_IGNDELIM }, /* Pf */
1.1       kristaps  144:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Po */
                    145:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Pq */
                    146:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Qc */
                    147:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Ql */
                    148:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Qo */
                    149:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Qq */
                    150:        { blk_exp_close, MDOC_EXPLICIT }, /* Re */
                    151:        { blk_full, MDOC_EXPLICIT }, /* Rs */
                    152:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Sc */
                    153:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* So */
                    154:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Sq */
                    155:        { in_line_eoln, 0 }, /* Sm */
                    156:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Sx */
                    157:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Sy */
                    158:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Tn */
                    159:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ux */
                    160:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Xc */
                    161:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Xo */
                    162:        { blk_full, MDOC_EXPLICIT | MDOC_CALLABLE }, /* Fo */
                    163:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Fc */
                    164:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Oo */
                    165:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Oc */
                    166:        { blk_full, MDOC_EXPLICIT }, /* Bk */
                    167:        { blk_exp_close, MDOC_EXPLICIT }, /* Ek */
                    168:        { in_line_eoln, 0 }, /* Bt */
                    169:        { in_line_eoln, 0 }, /* Hf */
                    170:        { obsolete, 0 }, /* Fr */
                    171:        { in_line_eoln, 0 }, /* Ud */
                    172:        { in_line_eoln, 0 }, /* Lb */
1.21      kristaps  173:        { in_line_eoln, 0 }, /* Lp */
1.12      kristaps  174:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Lk */
                    175:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Mt */
1.1       kristaps  176:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Brq */
                    177:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Bro */
                    178:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Brc */
                    179:        { in_line_eoln, 0 }, /* %C */
                    180:        { obsolete, 0 }, /* Es */
                    181:        { obsolete, 0 }, /* En */
                    182:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Dx */
                    183:        { in_line_eoln, 0 }, /* %Q */
1.20      kristaps  184:        { in_line_eoln, 0 }, /* br */
                    185:        { in_line_eoln, 0 }, /* sp */
1.37      kristaps  186:        { in_line_eoln, 0 }, /* %U */
1.1       kristaps  187: };
                    188:
                    189: const  struct mdoc_macro * const mdoc_macros = __mdoc_macros;
                    190:
                    191:
                    192: static int
                    193: swarn(struct mdoc *mdoc, enum mdoc_type type,
                    194:                int line, int pos, const struct mdoc_node *p)
                    195: {
                    196:        const char      *n, *t, *tt;
                    197:
                    198:        n = t = "<root>";
                    199:        tt = "block";
                    200:
                    201:        switch (type) {
                    202:        case (MDOC_BODY):
                    203:                tt = "multi-line";
                    204:                break;
                    205:        case (MDOC_HEAD):
                    206:                tt = "line";
                    207:                break;
                    208:        default:
                    209:                break;
                    210:        }
                    211:
                    212:        switch (p->type) {
                    213:        case (MDOC_BLOCK):
                    214:                n = mdoc_macronames[p->tok];
                    215:                t = "block";
                    216:                break;
                    217:        case (MDOC_BODY):
                    218:                n = mdoc_macronames[p->tok];
                    219:                t = "multi-line";
                    220:                break;
                    221:        case (MDOC_HEAD):
                    222:                n = mdoc_macronames[p->tok];
                    223:                t = "line";
                    224:                break;
                    225:        default:
                    226:                break;
                    227:        }
                    228:
                    229:        if ( ! (MDOC_IGN_SCOPE & mdoc->pflags))
1.16      kristaps  230:                return(mdoc_verr(mdoc, line, pos,
1.1       kristaps  231:                                "%s scope breaks %s scope of %s",
                    232:                                tt, t, n));
1.16      kristaps  233:        return(mdoc_vwarn(mdoc, line, pos,
1.1       kristaps  234:                                "%s scope breaks %s scope of %s",
                    235:                                tt, t, n));
                    236: }
                    237:
                    238:
                    239: /*
                    240:  * This is called at the end of parsing.  It must traverse up the tree,
                    241:  * closing out open [implicit] scopes.  Obviously, open explicit scopes
                    242:  * are errors.
                    243:  */
                    244: int
1.32      kristaps  245: mdoc_macroend(struct mdoc *m)
1.1       kristaps  246: {
                    247:        struct mdoc_node *n;
                    248:
                    249:        /* Scan for open explicit scopes. */
                    250:
1.32      kristaps  251:        n = MDOC_VALID & m->last->flags ?  m->last->parent : m->last;
1.1       kristaps  252:
                    253:        for ( ; n; n = n->parent) {
                    254:                if (MDOC_BLOCK != n->type)
                    255:                        continue;
                    256:                if ( ! (MDOC_EXPLICIT & mdoc_macros[n->tok].flags))
                    257:                        continue;
1.32      kristaps  258:                return(mdoc_nerr(m, n, EOPEN));
1.1       kristaps  259:        }
                    260:
1.32      kristaps  261:        /* Rewind to the first. */
                    262:
                    263:        return(rew_last(m, m->first));
1.1       kristaps  264: }
                    265:
1.32      kristaps  266:
                    267: /*
                    268:  * Look up a macro from within a subsequent context.
                    269:  */
1.53      kristaps  270: static enum mdoct
1.58      kristaps  271: lookup(enum mdoct from, const char *p)
1.28      kristaps  272: {
1.36      kristaps  273:        /* FIXME: make -diag lists be un-PARSED. */
1.28      kristaps  274:
                    275:        if ( ! (MDOC_PARSED & mdoc_macros[from].flags))
                    276:                return(MDOC_MAX);
1.35      kristaps  277:        return(lookup_raw(p));
1.28      kristaps  278: }
                    279:
                    280:
1.32      kristaps  281: /*
                    282:  * Lookup a macro following the initial line macro.
                    283:  */
1.53      kristaps  284: static enum mdoct
1.35      kristaps  285: lookup_raw(const char *p)
1.1       kristaps  286: {
1.58      kristaps  287:        enum mdoct       res;
1.1       kristaps  288:
1.34      kristaps  289:        if (MDOC_MAX == (res = mdoc_hash_find(p)))
1.28      kristaps  290:                return(MDOC_MAX);
                    291:        if (MDOC_CALLABLE & mdoc_macros[res].flags)
1.1       kristaps  292:                return(res);
                    293:        return(MDOC_MAX);
                    294: }
                    295:
                    296:
                    297: static int
1.32      kristaps  298: rew_last(struct mdoc *mdoc, const struct mdoc_node *to)
1.1       kristaps  299: {
                    300:
                    301:        assert(to);
                    302:        mdoc->next = MDOC_NEXT_SIBLING;
                    303:
                    304:        /* LINTED */
                    305:        while (mdoc->last != to) {
                    306:                if ( ! mdoc_valid_post(mdoc))
                    307:                        return(0);
                    308:                if ( ! mdoc_action_post(mdoc))
                    309:                        return(0);
                    310:                mdoc->last = mdoc->last->parent;
                    311:                assert(mdoc->last);
                    312:        }
                    313:
                    314:        if ( ! mdoc_valid_post(mdoc))
                    315:                return(0);
                    316:        return(mdoc_action_post(mdoc));
                    317: }
                    318:
                    319:
1.32      kristaps  320: /*
                    321:  * Return the opening macro of a closing one, e.g., `Ec' has `Eo' as its
                    322:  * matching pair.
                    323:  */
1.47      kristaps  324: static enum mdoct
                    325: rew_alt(enum mdoct tok)
1.1       kristaps  326: {
                    327:        switch (tok) {
                    328:        case (MDOC_Ac):
                    329:                return(MDOC_Ao);
                    330:        case (MDOC_Bc):
                    331:                return(MDOC_Bo);
                    332:        case (MDOC_Brc):
                    333:                return(MDOC_Bro);
                    334:        case (MDOC_Dc):
                    335:                return(MDOC_Do);
                    336:        case (MDOC_Ec):
                    337:                return(MDOC_Eo);
                    338:        case (MDOC_Ed):
                    339:                return(MDOC_Bd);
                    340:        case (MDOC_Ef):
                    341:                return(MDOC_Bf);
                    342:        case (MDOC_Ek):
                    343:                return(MDOC_Bk);
                    344:        case (MDOC_El):
                    345:                return(MDOC_Bl);
                    346:        case (MDOC_Fc):
                    347:                return(MDOC_Fo);
                    348:        case (MDOC_Oc):
                    349:                return(MDOC_Oo);
                    350:        case (MDOC_Pc):
                    351:                return(MDOC_Po);
                    352:        case (MDOC_Qc):
                    353:                return(MDOC_Qo);
                    354:        case (MDOC_Re):
                    355:                return(MDOC_Rs);
                    356:        case (MDOC_Sc):
                    357:                return(MDOC_So);
                    358:        case (MDOC_Xc):
                    359:                return(MDOC_Xo);
                    360:        default:
                    361:                break;
                    362:        }
                    363:        abort();
                    364:        /* NOTREACHED */
                    365: }
                    366:
                    367:
                    368: /*
                    369:  * Rewind rules.  This indicates whether to stop rewinding
                    370:  * (REWIND_HALT) without touching our current scope, stop rewinding and
                    371:  * close our current scope (REWIND_REWIND), or continue (REWIND_NOHALT).
                    372:  * The scope-closing and so on occurs in the various rew_* routines.
                    373:  */
1.51      kristaps  374: static enum rew
1.47      kristaps  375: rew_dohalt(enum mdoct tok, enum mdoc_type type,
                    376:                const struct mdoc_node *p)
1.1       kristaps  377: {
                    378:
                    379:        if (MDOC_ROOT == p->type)
                    380:                return(REWIND_HALT);
                    381:        if (MDOC_VALID & p->flags)
                    382:                return(REWIND_NOHALT);
                    383:
                    384:        switch (tok) {
                    385:        case (MDOC_Aq):
                    386:                /* FALLTHROUGH */
                    387:        case (MDOC_Bq):
                    388:                /* FALLTHROUGH */
                    389:        case (MDOC_Brq):
                    390:                /* FALLTHROUGH */
                    391:        case (MDOC_D1):
                    392:                /* FALLTHROUGH */
                    393:        case (MDOC_Dl):
                    394:                /* FALLTHROUGH */
                    395:        case (MDOC_Dq):
                    396:                /* FALLTHROUGH */
                    397:        case (MDOC_Op):
                    398:                /* FALLTHROUGH */
                    399:        case (MDOC_Pq):
                    400:                /* FALLTHROUGH */
                    401:        case (MDOC_Ql):
                    402:                /* FALLTHROUGH */
                    403:        case (MDOC_Qq):
                    404:                /* FALLTHROUGH */
                    405:        case (MDOC_Sq):
1.41      kristaps  406:                /* FALLTHROUGH */
                    407:        case (MDOC_Vt):
1.1       kristaps  408:                assert(MDOC_TAIL != type);
                    409:                if (type == p->type && tok == p->tok)
                    410:                        return(REWIND_REWIND);
                    411:                break;
                    412:        case (MDOC_It):
                    413:                assert(MDOC_TAIL != type);
                    414:                if (type == p->type && tok == p->tok)
                    415:                        return(REWIND_REWIND);
                    416:                if (MDOC_BODY == p->type && MDOC_Bl == p->tok)
                    417:                        return(REWIND_HALT);
                    418:                break;
                    419:        case (MDOC_Sh):
                    420:                if (type == p->type && tok == p->tok)
                    421:                        return(REWIND_REWIND);
                    422:                break;
1.19      kristaps  423:        case (MDOC_Nd):
                    424:                /* FALLTHROUGH */
1.1       kristaps  425:        case (MDOC_Ss):
                    426:                assert(MDOC_TAIL != type);
                    427:                if (type == p->type && tok == p->tok)
                    428:                        return(REWIND_REWIND);
                    429:                if (MDOC_BODY == p->type && MDOC_Sh == p->tok)
                    430:                        return(REWIND_HALT);
                    431:                break;
                    432:        case (MDOC_Ao):
                    433:                /* FALLTHROUGH */
                    434:        case (MDOC_Bd):
                    435:                /* FALLTHROUGH */
                    436:        case (MDOC_Bf):
                    437:                /* FALLTHROUGH */
                    438:        case (MDOC_Bk):
                    439:                /* FALLTHROUGH */
                    440:        case (MDOC_Bl):
                    441:                /* FALLTHROUGH */
                    442:        case (MDOC_Bo):
                    443:                /* FALLTHROUGH */
                    444:        case (MDOC_Bro):
                    445:                /* FALLTHROUGH */
                    446:        case (MDOC_Do):
                    447:                /* FALLTHROUGH */
                    448:        case (MDOC_Eo):
                    449:                /* FALLTHROUGH */
                    450:        case (MDOC_Fo):
                    451:                /* FALLTHROUGH */
                    452:        case (MDOC_Oo):
                    453:                /* FALLTHROUGH */
                    454:        case (MDOC_Po):
                    455:                /* FALLTHROUGH */
                    456:        case (MDOC_Qo):
                    457:                /* FALLTHROUGH */
                    458:        case (MDOC_Rs):
                    459:                /* FALLTHROUGH */
                    460:        case (MDOC_So):
                    461:                /* FALLTHROUGH */
                    462:        case (MDOC_Xo):
                    463:                if (type == p->type && tok == p->tok)
                    464:                        return(REWIND_REWIND);
                    465:                break;
                    466:        /* Multi-line explicit scope close. */
                    467:        case (MDOC_Ac):
                    468:                /* FALLTHROUGH */
                    469:        case (MDOC_Bc):
                    470:                /* FALLTHROUGH */
                    471:        case (MDOC_Brc):
                    472:                /* FALLTHROUGH */
                    473:        case (MDOC_Dc):
                    474:                /* FALLTHROUGH */
                    475:        case (MDOC_Ec):
                    476:                /* FALLTHROUGH */
                    477:        case (MDOC_Ed):
                    478:                /* FALLTHROUGH */
                    479:        case (MDOC_Ek):
                    480:                /* FALLTHROUGH */
                    481:        case (MDOC_El):
                    482:                /* FALLTHROUGH */
                    483:        case (MDOC_Fc):
                    484:                /* FALLTHROUGH */
                    485:        case (MDOC_Ef):
                    486:                /* FALLTHROUGH */
                    487:        case (MDOC_Oc):
                    488:                /* FALLTHROUGH */
                    489:        case (MDOC_Pc):
                    490:                /* FALLTHROUGH */
                    491:        case (MDOC_Qc):
                    492:                /* FALLTHROUGH */
                    493:        case (MDOC_Re):
                    494:                /* FALLTHROUGH */
                    495:        case (MDOC_Sc):
                    496:                /* FALLTHROUGH */
                    497:        case (MDOC_Xc):
                    498:                if (type == p->type && rew_alt(tok) == p->tok)
                    499:                        return(REWIND_REWIND);
                    500:                break;
                    501:        default:
                    502:                abort();
                    503:                /* NOTREACHED */
                    504:        }
                    505:
                    506:        return(REWIND_NOHALT);
                    507: }
                    508:
                    509:
                    510: /*
                    511:  * See if we can break an encountered scope (the rew_dohalt has returned
                    512:  * REWIND_NOHALT).
                    513:  */
                    514: static int
1.47      kristaps  515: rew_dobreak(enum mdoct tok, const struct mdoc_node *p)
1.1       kristaps  516: {
                    517:
                    518:        assert(MDOC_ROOT != p->type);
                    519:        if (MDOC_ELEM == p->type)
                    520:                return(1);
                    521:        if (MDOC_TEXT == p->type)
                    522:                return(1);
                    523:        if (MDOC_VALID & p->flags)
                    524:                return(1);
                    525:
                    526:        switch (tok) {
                    527:        case (MDOC_It):
                    528:                return(MDOC_It == p->tok);
1.19      kristaps  529:        case (MDOC_Nd):
                    530:                return(MDOC_Nd == p->tok);
1.1       kristaps  531:        case (MDOC_Ss):
                    532:                return(MDOC_Ss == p->tok);
                    533:        case (MDOC_Sh):
1.19      kristaps  534:                if (MDOC_Nd == p->tok)
                    535:                        return(1);
1.1       kristaps  536:                if (MDOC_Ss == p->tok)
                    537:                        return(1);
                    538:                return(MDOC_Sh == p->tok);
                    539:        case (MDOC_El):
                    540:                if (MDOC_It == p->tok)
                    541:                        return(1);
                    542:                break;
                    543:        case (MDOC_Oc):
                    544:                if (MDOC_Op == p->tok)
                    545:                        return(1);
                    546:                break;
                    547:        default:
                    548:                break;
                    549:        }
                    550:
                    551:        if (MDOC_EXPLICIT & mdoc_macros[tok].flags)
                    552:                return(p->tok == rew_alt(tok));
                    553:        else if (MDOC_BLOCK == p->type)
                    554:                return(1);
                    555:
                    556:        return(tok == p->tok);
                    557: }
                    558:
                    559:
                    560: static int
1.47      kristaps  561: rew_elem(struct mdoc *mdoc, enum mdoct tok)
1.1       kristaps  562: {
                    563:        struct mdoc_node *n;
                    564:
                    565:        n = mdoc->last;
                    566:        if (MDOC_ELEM != n->type)
                    567:                n = n->parent;
                    568:        assert(MDOC_ELEM == n->type);
                    569:        assert(tok == n->tok);
                    570:
                    571:        return(rew_last(mdoc, n));
                    572: }
                    573:
                    574:
                    575: static int
1.32      kristaps  576: rew_sub(enum mdoc_type t, struct mdoc *m,
1.47      kristaps  577:                enum mdoct tok, int line, int ppos)
1.1       kristaps  578: {
                    579:        struct mdoc_node *n;
1.51      kristaps  580:        enum rew          c;
1.1       kristaps  581:
                    582:        /* LINTED */
1.32      kristaps  583:        for (n = m->last; n; n = n->parent) {
                    584:                c = rew_dohalt(tok, t, n);
                    585:                if (REWIND_HALT == c) {
                    586:                        if (MDOC_BLOCK != t)
                    587:                                return(1);
                    588:                        if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags))
                    589:                                return(1);
                    590:                        return(mdoc_perr(m, line, ppos, ENOCTX));
                    591:                }
1.1       kristaps  592:                if (REWIND_REWIND == c)
                    593:                        break;
                    594:                else if (rew_dobreak(tok, n))
                    595:                        continue;
1.32      kristaps  596:                if ( ! swarn(m, t, line, ppos, n))
1.1       kristaps  597:                        return(0);
                    598:        }
                    599:
                    600:        assert(n);
1.47      kristaps  601:        if ( ! rew_last(m, n))
                    602:                return(0);
                    603:
                    604: #ifdef UGLY
                    605:        /*
                    606:         * The current block extends an enclosing block beyond a line
                    607:         * break.  Now that the current block ends, close the enclosing
                    608:         * block, too.
                    609:         */
                    610:        if (NULL != (n = n->pending)) {
                    611:                assert(MDOC_HEAD == n->type);
                    612:                if ( ! rew_last(m, n))
                    613:                        return(0);
                    614:                if ( ! mdoc_body_alloc(m, n->line, n->pos, n->tok))
                    615:                        return(0);
                    616:        }
                    617: #endif
                    618:
                    619:        return(1);
1.1       kristaps  620: }
                    621:
                    622:
                    623: static int
                    624: append_delims(struct mdoc *mdoc, int line, int *pos, char *buf)
                    625: {
1.53      kristaps  626:        int              lastarg;
1.55      kristaps  627:        enum margserr    ac;
1.1       kristaps  628:        char            *p;
                    629:
                    630:        if (0 == buf[*pos])
                    631:                return(1);
                    632:
                    633:        for (;;) {
                    634:                lastarg = *pos;
1.53      kristaps  635:                ac = mdoc_zargs(mdoc, line, pos, buf, ARGS_NOWARN, &p);
1.1       kristaps  636:
1.53      kristaps  637:                if (ARGS_ERROR == ac)
1.1       kristaps  638:                        return(0);
1.53      kristaps  639:                else if (ARGS_EOLN == ac)
1.1       kristaps  640:                        break;
                    641:                assert(mdoc_isdelim(p));
                    642:                if ( ! mdoc_word_alloc(mdoc, line, lastarg, p))
                    643:                        return(0);
                    644:        }
                    645:
                    646:        return(1);
                    647: }
                    648:
                    649:
                    650: /*
                    651:  * Close out block partial/full explicit.
                    652:  */
                    653: static int
                    654: blk_exp_close(MACRO_PROT_ARGS)
                    655: {
1.53      kristaps  656:        int              j, lastarg, maxargs, flushed;
1.55      kristaps  657:        enum margserr    ac;
1.53      kristaps  658:        enum mdoct       ntok;
1.1       kristaps  659:        char            *p;
                    660:
                    661:        switch (tok) {
                    662:        case (MDOC_Ec):
                    663:                maxargs = 1;
                    664:                break;
                    665:        default:
                    666:                maxargs = 0;
                    667:                break;
                    668:        }
                    669:
                    670:        if ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags)) {
1.22      kristaps  671:                if (buf[*pos])
1.32      kristaps  672:                        if ( ! mdoc_pwarn(m, line, ppos, ENOLINE))
1.1       kristaps  673:                                return(0);
1.22      kristaps  674:
1.32      kristaps  675:                if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1.22      kristaps  676:                        return(0);
1.32      kristaps  677:                return(rew_sub(MDOC_BLOCK, m, tok, line, ppos));
1.1       kristaps  678:        }
                    679:
1.32      kristaps  680:        if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1.1       kristaps  681:                return(0);
                    682:
1.32      kristaps  683:        if (maxargs > 0)
                    684:                if ( ! mdoc_tail_alloc(m, line, ppos, rew_alt(tok)))
1.1       kristaps  685:                        return(0);
                    686:
1.27      kristaps  687:        for (flushed = j = 0; ; j++) {
1.1       kristaps  688:                lastarg = *pos;
                    689:
                    690:                if (j == maxargs && ! flushed) {
1.32      kristaps  691:                        if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
1.1       kristaps  692:                                return(0);
                    693:                        flushed = 1;
                    694:                }
                    695:
1.53      kristaps  696:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps  697:
1.53      kristaps  698:                if (ARGS_ERROR == ac)
1.1       kristaps  699:                        return(0);
1.53      kristaps  700:                if (ARGS_PUNCT == ac)
1.1       kristaps  701:                        break;
1.53      kristaps  702:                if (ARGS_EOLN == ac)
1.1       kristaps  703:                        break;
                    704:
1.54      kristaps  705:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                    706:
                    707:                if (MDOC_MAX == ntok) {
                    708:                        if ( ! mdoc_word_alloc(m, line, lastarg, p))
1.1       kristaps  709:                                return(0);
1.54      kristaps  710:                        continue;
                    711:                }
1.1       kristaps  712:
1.54      kristaps  713:                if ( ! flushed) {
                    714:                        if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
                    715:                                return(0);
                    716:                        flushed = 1;
                    717:                }
                    718:                if ( ! mdoc_macro(m, ntok, line, lastarg, pos, buf))
1.1       kristaps  719:                        return(0);
1.54      kristaps  720:                break;
1.1       kristaps  721:        }
                    722:
1.32      kristaps  723:        if ( ! flushed && ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
1.1       kristaps  724:                return(0);
                    725:
                    726:        if (ppos > 1)
                    727:                return(1);
1.32      kristaps  728:        return(append_delims(m, line, pos, buf));
1.1       kristaps  729: }
                    730:
                    731:
                    732: static int
                    733: in_line(MACRO_PROT_ARGS)
                    734: {
1.56      kristaps  735:        int              la, lastpunct, cnt, d, nc;
                    736:        enum margverr    av;
1.53      kristaps  737:        enum mdoct       ntok;
1.55      kristaps  738:        enum margserr    ac;
1.53      kristaps  739:        struct mdoc_arg *arg;
                    740:        char            *p;
1.1       kristaps  741:
1.4       kristaps  742:        /*
                    743:         * Whether we allow ignored elements (those without content,
                    744:         * usually because of reserved words) to squeak by.
                    745:         */
1.45      kristaps  746:
1.4       kristaps  747:        switch (tok) {
1.26      kristaps  748:        case (MDOC_An):
                    749:                /* FALLTHROUGH */
                    750:        case (MDOC_Ar):
1.4       kristaps  751:                /* FALLTHROUGH */
                    752:        case (MDOC_Fl):
                    753:                /* FALLTHROUGH */
1.12      kristaps  754:        case (MDOC_Lk):
                    755:                /* FALLTHROUGH */
1.26      kristaps  756:        case (MDOC_Nm):
                    757:                /* FALLTHROUGH */
1.25      kristaps  758:        case (MDOC_Pa):
1.4       kristaps  759:                nc = 1;
                    760:                break;
                    761:        default:
                    762:                nc = 0;
                    763:                break;
                    764:        }
                    765:
1.27      kristaps  766:        for (arg = NULL;; ) {
1.1       kristaps  767:                la = *pos;
1.56      kristaps  768:                av = mdoc_argv(m, line, tok, &arg, pos, buf);
1.1       kristaps  769:
1.56      kristaps  770:                if (ARGV_WORD == av) {
1.1       kristaps  771:                        *pos = la;
                    772:                        break;
                    773:                }
1.56      kristaps  774:                if (ARGV_EOLN == av)
1.1       kristaps  775:                        break;
1.56      kristaps  776:                if (ARGV_ARG == av)
1.1       kristaps  777:                        continue;
                    778:
                    779:                mdoc_argv_free(arg);
                    780:                return(0);
                    781:        }
                    782:
1.4       kristaps  783:        for (cnt = 0, lastpunct = 1;; ) {
1.1       kristaps  784:                la = *pos;
1.53      kristaps  785:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps  786:
1.53      kristaps  787:                if (ARGS_ERROR == ac)
1.1       kristaps  788:                        return(0);
1.53      kristaps  789:                if (ARGS_EOLN == ac)
1.1       kristaps  790:                        break;
1.53      kristaps  791:                if (ARGS_PUNCT == ac)
1.1       kristaps  792:                        break;
                    793:
1.53      kristaps  794:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1.1       kristaps  795:
1.4       kristaps  796:                /*
                    797:                 * In this case, we've located a submacro and must
                    798:                 * execute it.  Close out scope, if open.  If no
                    799:                 * elements have been generated, either create one (nc)
                    800:                 * or raise a warning.
                    801:                 */
1.1       kristaps  802:
1.53      kristaps  803:                if (MDOC_MAX != ntok) {
1.32      kristaps  804:                        if (0 == lastpunct && ! rew_elem(m, tok))
1.1       kristaps  805:                                return(0);
1.4       kristaps  806:                        if (nc && 0 == cnt) {
1.32      kristaps  807:                                if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
1.3       kristaps  808:                                        return(0);
1.32      kristaps  809:                                if ( ! rew_last(m, m->last))
1.12      kristaps  810:                                        return(0);
1.7       kristaps  811:                        } else if ( ! nc && 0 == cnt) {
                    812:                                mdoc_argv_free(arg);
1.32      kristaps  813:                                if ( ! mdoc_pwarn(m, line, ppos, EIGNE))
1.3       kristaps  814:                                        return(0);
1.7       kristaps  815:                        }
1.53      kristaps  816:                        if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1.1       kristaps  817:                                return(0);
                    818:                        if (ppos > 1)
                    819:                                return(1);
1.32      kristaps  820:                        return(append_delims(m, line, pos, buf));
1.29      kristaps  821:                }
1.1       kristaps  822:
1.4       kristaps  823:                /*
                    824:                 * Non-quote-enclosed punctuation.  Set up our scope, if
                    825:                 * a word; rewind the scope, if a delimiter; then append
                    826:                 * the word.
                    827:                 */
1.1       kristaps  828:
1.53      kristaps  829:                d = ARGS_QWORD == ac ? 0 : mdoc_isdelim(p);
1.3       kristaps  830:
1.53      kristaps  831:                if (ARGS_QWORD != ac && d) {
1.32      kristaps  832:                        if (0 == lastpunct && ! rew_elem(m, tok))
1.1       kristaps  833:                                return(0);
                    834:                        lastpunct = 1;
                    835:                } else if (lastpunct) {
1.32      kristaps  836:                        if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
1.1       kristaps  837:                                return(0);
                    838:                        lastpunct = 0;
                    839:                }
                    840:
1.3       kristaps  841:                if ( ! d)
                    842:                        cnt++;
1.32      kristaps  843:                if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps  844:                        return(0);
1.39      kristaps  845:
                    846:                /*
                    847:                 * `Fl' macros have their scope re-opened with each new
                    848:                 * word so that the `-' can be added to each one without
                    849:                 * having to parse out spaces.
                    850:                 */
                    851:                if (0 == lastpunct && MDOC_Fl == tok) {
                    852:                        if ( ! rew_elem(m, tok))
                    853:                                return(0);
                    854:                        lastpunct = 1;
                    855:                }
1.1       kristaps  856:        }
                    857:
1.32      kristaps  858:        if (0 == lastpunct && ! rew_elem(m, tok))
1.1       kristaps  859:                return(0);
1.4       kristaps  860:
                    861:        /*
                    862:         * If no elements have been collected and we're allowed to have
                    863:         * empties (nc), open a scope and close it out.  Otherwise,
                    864:         * raise a warning.
                    865:         */
1.45      kristaps  866:
1.4       kristaps  867:        if (nc && 0 == cnt) {
1.32      kristaps  868:                if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
1.3       kristaps  869:                        return(0);
1.32      kristaps  870:                if ( ! rew_last(m, m->last))
1.12      kristaps  871:                        return(0);
1.7       kristaps  872:        } else if ( ! nc && 0 == cnt) {
                    873:                mdoc_argv_free(arg);
1.32      kristaps  874:                if ( ! mdoc_pwarn(m, line, ppos, EIGNE))
1.3       kristaps  875:                        return(0);
1.7       kristaps  876:        }
1.4       kristaps  877:
1.1       kristaps  878:        if (ppos > 1)
                    879:                return(1);
1.32      kristaps  880:        return(append_delims(m, line, pos, buf));
1.1       kristaps  881: }
                    882:
                    883:
                    884: static int
                    885: blk_full(MACRO_PROT_ARGS)
                    886: {
1.59    ! kristaps  887:        int               la, pcnt;
1.1       kristaps  888:        struct mdoc_arg  *arg;
1.45      kristaps  889:        struct mdoc_node *head; /* save of head macro */
1.49      kristaps  890:        struct mdoc_node *body; /* save of body macro */
1.48      kristaps  891: #ifdef UGLY
1.47      kristaps  892:        struct mdoc_node *n;
1.48      kristaps  893: #endif
1.53      kristaps  894:        enum mdoct        ntok;
1.59    ! kristaps  895:        enum margserr     ac, lac;
1.56      kristaps  896:        enum margverr     av;
1.1       kristaps  897:        char             *p;
                    898:
1.45      kristaps  899:        /* Close out prior implicit scope. */
1.19      kristaps  900:
1.1       kristaps  901:        if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)) {
1.32      kristaps  902:                if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1.1       kristaps  903:                        return(0);
1.32      kristaps  904:                if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
1.1       kristaps  905:                        return(0);
                    906:        }
                    907:
1.45      kristaps  908:        /*
                    909:         * This routine accomodates implicitly- and explicitly-scoped
                    910:         * macro openings.  Implicit ones first close out prior scope
                    911:         * (seen above).  Delay opening the head until necessary to
                    912:         * allow leading punctuation to print.  Special consideration
                    913:         * for `It -column', which has phrase-part syntax instead of
                    914:         * regular child nodes.
                    915:         */
                    916:
1.1       kristaps  917:        for (arg = NULL;; ) {
1.45      kristaps  918:                la = *pos;
1.56      kristaps  919:                av = mdoc_argv(m, line, tok, &arg, pos, buf);
1.1       kristaps  920:
1.56      kristaps  921:                if (ARGV_WORD == av) {
1.45      kristaps  922:                        *pos = la;
1.1       kristaps  923:                        break;
                    924:                }
                    925:
1.56      kristaps  926:                if (ARGV_EOLN == av)
1.1       kristaps  927:                        break;
1.56      kristaps  928:                if (ARGV_ARG == av)
1.1       kristaps  929:                        continue;
                    930:
                    931:                mdoc_argv_free(arg);
                    932:                return(0);
                    933:        }
                    934:
1.32      kristaps  935:        if ( ! mdoc_block_alloc(m, line, ppos, tok, arg))
1.1       kristaps  936:                return(0);
                    937:
1.49      kristaps  938:        head = body = NULL;
1.1       kristaps  939:
1.45      kristaps  940:        /*
                    941:         * The `Nd' macro has all arguments in its body: it's a hybrid
                    942:         * of block partial-explicit and full-implicit.  Stupid.
                    943:         */
1.19      kristaps  944:
1.45      kristaps  945:        if (MDOC_Nd == tok) {
                    946:                if ( ! mdoc_head_alloc(m, line, ppos, tok))
                    947:                        return(0);
                    948:                head = m->last;
1.32      kristaps  949:                if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.19      kristaps  950:                        return(0);
1.32      kristaps  951:                if ( ! mdoc_body_alloc(m, line, ppos, tok))
1.19      kristaps  952:                        return(0);
1.49      kristaps  953:                body = m->last;
1.19      kristaps  954:        }
                    955:
1.59    ! kristaps  956:        ac = ARGS_ERROR;
        !           957:
        !           958:        for (pcnt = 0; ; ) {
1.45      kristaps  959:                la = *pos;
1.59    ! kristaps  960:                lac = ac;
1.53      kristaps  961:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps  962:
1.53      kristaps  963:                if (ARGS_ERROR == ac)
1.1       kristaps  964:                        return(0);
1.53      kristaps  965:                if (ARGS_EOLN == ac)
1.1       kristaps  966:                        break;
1.45      kristaps  967:
                    968:                /* Don't emit leading punct. for phrases. */
                    969:
1.59    ! kristaps  970:                if (NULL == head &&
        !           971:                                ARGS_PHRASE != ac &&
1.57      kristaps  972:                                ARGS_PPHRASE != ac &&
1.59    ! kristaps  973:                                ARGS_PEND != ac &&
1.53      kristaps  974:                                ARGS_QWORD != ac &&
1.45      kristaps  975:                                1 == mdoc_isdelim(p)) {
                    976:                        if ( ! mdoc_word_alloc(m, line, la, p))
                    977:                                return(0);
                    978:                        continue;
                    979:                }
                    980:
                    981:                /* Always re-open head for phrases. */
                    982:
1.59    ! kristaps  983:                if (NULL == head ||
        !           984:                                ARGS_PHRASE == ac ||
        !           985:                                ARGS_PEND == ac ||
1.57      kristaps  986:                                ARGS_PPHRASE == ac) {
1.45      kristaps  987:                        if ( ! mdoc_head_alloc(m, line, ppos, tok))
                    988:                                return(0);
                    989:                        head = m->last;
                    990:                }
                    991:
1.59    ! kristaps  992:                if (ARGS_PHRASE == ac ||
        !           993:                                ARGS_PEND == ac ||
        !           994:                                ARGS_PPHRASE == ac) {
        !           995:                        /*
        !           996:                         * Special treatment for the last phrase.  A
        !           997:                         * prior ARGS_PHRASE gets is handled as a
        !           998:                         * regular ARGS_PHRASE, but a prior ARGS_PPHRASE
        !           999:                         * has special handling.
        !          1000:                         */
        !          1001:                        if (ARGS_PEND == ac && ARGS_ERROR == lac)
        !          1002:                                ac = ARGS_PHRASE;
        !          1003:                        else if (ARGS_PEND == ac && ARGS_PHRASE == lac)
        !          1004:                                ac = ARGS_PHRASE;
        !          1005:
        !          1006:                        if ( ! phrase(m, line, la, buf, ac, pcnt++))
1.1       kristaps 1007:                                return(0);
1.32      kristaps 1008:                        if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.1       kristaps 1009:                                return(0);
                   1010:                        continue;
                   1011:                }
                   1012:
1.54      kristaps 1013:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1014:
                   1015:                if (MDOC_MAX == ntok) {
1.53      kristaps 1016:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps 1017:                                return(0);
1.53      kristaps 1018:                        continue;
1.45      kristaps 1019:                }
1.53      kristaps 1020:
                   1021:                if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1.45      kristaps 1022:                        return(0);
1.53      kristaps 1023:                break;
1.45      kristaps 1024:        }
1.1       kristaps 1025:
1.45      kristaps 1026:        if (NULL == head) {
                   1027:                if ( ! mdoc_head_alloc(m, line, ppos, tok))
1.1       kristaps 1028:                        return(0);
1.45      kristaps 1029:                head = m->last;
1.1       kristaps 1030:        }
                   1031:
1.32      kristaps 1032:        if (1 == ppos && ! append_delims(m, line, pos, buf))
1.1       kristaps 1033:                return(0);
1.19      kristaps 1034:
1.49      kristaps 1035:        /* If we've already opened our body, exit now. */
1.45      kristaps 1036:
1.49      kristaps 1037:        if (NULL != body)
1.19      kristaps 1038:                return(1);
                   1039:
1.47      kristaps 1040: #ifdef UGLY
                   1041:        /*
1.49      kristaps 1042:         * If there is an open (i.e., unvalidated) sub-block requiring
                   1043:         * explicit close-out, postpone switching the current block from
                   1044:         * head to body until the rew_sub() call closing out that
                   1045:         * sub-block.
1.47      kristaps 1046:         */
                   1047:        for (n = m->last; n && n != head; n = n->parent) {
1.49      kristaps 1048:                if (MDOC_BLOCK == n->type &&
                   1049:                                MDOC_EXPLICIT & mdoc_macros[n->tok].flags &&
                   1050:                                ! (MDOC_VALID & n->flags)) {
                   1051:                        assert( ! (MDOC_ACTED & n->flags));
1.47      kristaps 1052:                        n->pending = head;
                   1053:                        return(1);
                   1054:                }
                   1055:        }
                   1056: #endif
                   1057:
1.45      kristaps 1058:        /* Close out scopes to remain in a consistent state. */
                   1059:
1.32      kristaps 1060:        if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.1       kristaps 1061:                return(0);
1.32      kristaps 1062:        if ( ! mdoc_body_alloc(m, line, ppos, tok))
1.1       kristaps 1063:                return(0);
                   1064:
                   1065:        return(1);
                   1066: }
                   1067:
                   1068:
                   1069: static int
                   1070: blk_part_imp(MACRO_PROT_ARGS)
                   1071: {
1.53      kristaps 1072:        int               la;
                   1073:        enum mdoct        ntok;
1.55      kristaps 1074:        enum margserr     ac;
1.1       kristaps 1075:        char             *p;
1.43      kristaps 1076:        struct mdoc_node *blk; /* saved block context */
                   1077:        struct mdoc_node *body; /* saved body context */
                   1078:        struct mdoc_node *n;
1.1       kristaps 1079:
1.43      kristaps 1080:        /*
                   1081:         * A macro that spans to the end of the line.  This is generally
                   1082:         * (but not necessarily) called as the first macro.  The block
                   1083:         * has a head as the immediate child, which is always empty,
                   1084:         * followed by zero or more opening punctuation nodes, then the
                   1085:         * body (which may be empty, depending on the macro), then zero
                   1086:         * or more closing punctuation nodes.
                   1087:         */
1.32      kristaps 1088:
                   1089:        if ( ! mdoc_block_alloc(m, line, ppos, tok, NULL))
                   1090:                return(0);
1.43      kristaps 1091:
1.32      kristaps 1092:        blk = m->last;
1.43      kristaps 1093:
1.32      kristaps 1094:        if ( ! mdoc_head_alloc(m, line, ppos, tok))
1.1       kristaps 1095:                return(0);
1.32      kristaps 1096:        if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.1       kristaps 1097:                return(0);
                   1098:
1.43      kristaps 1099:        /*
                   1100:         * Open the body scope "on-demand", that is, after we've
                   1101:         * processed all our the leading delimiters (open parenthesis,
                   1102:         * etc.).
                   1103:         */
1.1       kristaps 1104:
1.43      kristaps 1105:        for (body = NULL; ; ) {
1.32      kristaps 1106:                la = *pos;
1.53      kristaps 1107:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.43      kristaps 1108:
1.53      kristaps 1109:                if (ARGS_ERROR == ac)
1.1       kristaps 1110:                        return(0);
1.53      kristaps 1111:                if (ARGS_EOLN == ac)
1.43      kristaps 1112:                        break;
1.53      kristaps 1113:                if (ARGS_PUNCT == ac)
1.1       kristaps 1114:                        break;
                   1115:
1.53      kristaps 1116:                if (NULL == body && ARGS_QWORD != ac &&
1.50      kristaps 1117:                                1 == mdoc_isdelim(p)) {
1.32      kristaps 1118:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps 1119:                                return(0);
                   1120:                        continue;
                   1121:                }
                   1122:
1.43      kristaps 1123:                if (NULL == body) {
                   1124:                       if ( ! mdoc_body_alloc(m, line, ppos, tok))
                   1125:                               return(0);
                   1126:                        body = m->last;
                   1127:                }
                   1128:
1.54      kristaps 1129:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1130:
                   1131:                if (MDOC_MAX == ntok) {
1.53      kristaps 1132:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.43      kristaps 1133:                                return(0);
1.53      kristaps 1134:                        continue;
                   1135:                }
1.43      kristaps 1136:
1.53      kristaps 1137:                if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1.1       kristaps 1138:                        return(0);
1.53      kristaps 1139:                break;
1.1       kristaps 1140:        }
                   1141:
1.43      kristaps 1142:        /* Clean-ups to leave in a consistent state. */
                   1143:
1.44      kristaps 1144:        if (NULL == body) {
                   1145:                if ( ! mdoc_body_alloc(m, line, ppos, tok))
                   1146:                        return(0);
                   1147:                body = m->last;
                   1148:        }
1.43      kristaps 1149:
1.32      kristaps 1150:        /*
                   1151:         * If we can't rewind to our body, then our scope has already
                   1152:         * been closed by another macro (like `Oc' closing `Op').  This
                   1153:         * is ugly behaviour nodding its head to OpenBSD's overwhelming
1.47      kristaps 1154:         * crufty use of `Op' breakage.
1.1       kristaps 1155:         */
1.32      kristaps 1156:        for (n = m->last; n; n = n->parent)
1.1       kristaps 1157:                if (body == n)
                   1158:                        break;
1.43      kristaps 1159:
1.32      kristaps 1160:        if (NULL == n && ! mdoc_nwarn(m, body, EIMPBRK))
                   1161:                return(0);
1.43      kristaps 1162:
1.32      kristaps 1163:        if (n && ! rew_last(m, body))
                   1164:                return(0);
1.1       kristaps 1165:
1.32      kristaps 1166:        /* Standard appending of delimiters. */
1.1       kristaps 1167:
1.32      kristaps 1168:        if (1 == ppos && ! append_delims(m, line, pos, buf))
1.1       kristaps 1169:                return(0);
                   1170:
1.32      kristaps 1171:        /* Rewind scope, if applicable. */
1.1       kristaps 1172:
1.32      kristaps 1173:        if (n && ! rew_last(m, blk))
1.1       kristaps 1174:                return(0);
                   1175:
                   1176:        return(1);
                   1177: }
                   1178:
                   1179:
                   1180: static int
                   1181: blk_part_exp(MACRO_PROT_ARGS)
                   1182: {
1.53      kristaps 1183:        int               la;
1.55      kristaps 1184:        enum margserr     ac;
1.43      kristaps 1185:        struct mdoc_node *head; /* keep track of head */
                   1186:        struct mdoc_node *body; /* keep track of body */
1.1       kristaps 1187:        char             *p;
1.53      kristaps 1188:        enum mdoct        ntok;
1.1       kristaps 1189:
1.43      kristaps 1190:        /*
                   1191:         * The opening of an explicit macro having zero or more leading
                   1192:         * punctuation nodes; a head with optional single element (the
                   1193:         * case of `Eo'); and a body that may be empty.
                   1194:         */
1.32      kristaps 1195:
                   1196:        if ( ! mdoc_block_alloc(m, line, ppos, tok, NULL))
1.1       kristaps 1197:                return(0);
1.32      kristaps 1198:
1.43      kristaps 1199:        for (head = body = NULL; ; ) {
1.32      kristaps 1200:                la = *pos;
1.53      kristaps 1201:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps 1202:
1.53      kristaps 1203:                if (ARGS_ERROR == ac)
1.1       kristaps 1204:                        return(0);
1.53      kristaps 1205:                if (ARGS_PUNCT == ac)
1.1       kristaps 1206:                        break;
1.53      kristaps 1207:                if (ARGS_EOLN == ac)
1.1       kristaps 1208:                        break;
1.43      kristaps 1209:
                   1210:                /* Flush out leading punctuation. */
                   1211:
1.53      kristaps 1212:                if (NULL == head && ARGS_QWORD != ac &&
1.50      kristaps 1213:                                1 == mdoc_isdelim(p)) {
1.43      kristaps 1214:                        assert(NULL == body);
                   1215:                        if ( ! mdoc_word_alloc(m, line, la, p))
                   1216:                                return(0);
                   1217:                        continue;
                   1218:                }
                   1219:
                   1220:                if (NULL == head) {
                   1221:                        assert(NULL == body);
                   1222:                        if ( ! mdoc_head_alloc(m, line, ppos, tok))
1.1       kristaps 1223:                                return(0);
1.43      kristaps 1224:                        head = m->last;
1.1       kristaps 1225:                }
                   1226:
1.43      kristaps 1227:                /*
                   1228:                 * `Eo' gobbles any data into the head, but most other
                   1229:                 * macros just immediately close out and begin the body.
                   1230:                 */
                   1231:
                   1232:                if (NULL == body) {
                   1233:                        assert(head);
                   1234:                        /* No check whether it's a macro! */
                   1235:                        if (MDOC_Eo == tok)
                   1236:                                if ( ! mdoc_word_alloc(m, line, la, p))
                   1237:                                        return(0);
                   1238:
1.32      kristaps 1239:                        if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.1       kristaps 1240:                                return(0);
1.32      kristaps 1241:                        if ( ! mdoc_body_alloc(m, line, ppos, tok))
1.1       kristaps 1242:                                return(0);
1.43      kristaps 1243:                        body = m->last;
                   1244:
                   1245:                        if (MDOC_Eo == tok)
                   1246:                                continue;
1.1       kristaps 1247:                }
1.43      kristaps 1248:
                   1249:                assert(NULL != head && NULL != body);
                   1250:
1.54      kristaps 1251:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1252:
                   1253:                if (MDOC_MAX == ntok) {
1.53      kristaps 1254:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.43      kristaps 1255:                                return(0);
1.53      kristaps 1256:                        continue;
1.43      kristaps 1257:                }
                   1258:
1.53      kristaps 1259:                if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1.1       kristaps 1260:                        return(0);
1.53      kristaps 1261:                break;
1.1       kristaps 1262:        }
                   1263:
1.43      kristaps 1264:        /* Clean-up to leave in a consistent state. */
1.32      kristaps 1265:
1.43      kristaps 1266:        if (NULL == head) {
                   1267:                if ( ! mdoc_head_alloc(m, line, ppos, tok))
                   1268:                        return(0);
                   1269:                head = m->last;
                   1270:        }
                   1271:
                   1272:        if (NULL == body) {
1.32      kristaps 1273:                if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.1       kristaps 1274:                        return(0);
1.32      kristaps 1275:                if ( ! mdoc_body_alloc(m, line, ppos, tok))
1.1       kristaps 1276:                        return(0);
1.43      kristaps 1277:                body = m->last;
1.1       kristaps 1278:        }
                   1279:
1.32      kristaps 1280:        /* Standard appending of delimiters. */
                   1281:
1.1       kristaps 1282:        if (ppos > 1)
                   1283:                return(1);
1.43      kristaps 1284:
1.32      kristaps 1285:        return(append_delims(m, line, pos, buf));
1.1       kristaps 1286: }
                   1287:
                   1288:
                   1289: static int
                   1290: in_line_argn(MACRO_PROT_ARGS)
                   1291: {
1.56      kristaps 1292:        int              la, flushed, j, maxargs;
1.55      kristaps 1293:        enum margserr    ac;
1.56      kristaps 1294:        enum margverr    av;
1.53      kristaps 1295:        struct mdoc_arg *arg;
                   1296:        char            *p;
                   1297:        enum mdoct       ntok;
1.1       kristaps 1298:
1.46      kristaps 1299:        /*
                   1300:         * A line macro that has a fixed number of arguments (maxargs).
                   1301:         * Only open the scope once the first non-leading-punctuation is
                   1302:         * found (unless MDOC_IGNDELIM is noted, like in `Pf'), then
                   1303:         * keep it open until the maximum number of arguments are
                   1304:         * exhausted.
                   1305:         */
1.1       kristaps 1306:
                   1307:        switch (tok) {
                   1308:        case (MDOC_Ap):
                   1309:                /* FALLTHROUGH */
                   1310:        case (MDOC_No):
                   1311:                /* FALLTHROUGH */
                   1312:        case (MDOC_Ns):
                   1313:                /* FALLTHROUGH */
                   1314:        case (MDOC_Ux):
                   1315:                maxargs = 0;
                   1316:                break;
1.42      kristaps 1317:        case (MDOC_Xr):
                   1318:                maxargs = 2;
                   1319:                break;
1.1       kristaps 1320:        default:
                   1321:                maxargs = 1;
                   1322:                break;
                   1323:        }
                   1324:
1.46      kristaps 1325:        for (arg = NULL; ; ) {
1.32      kristaps 1326:                la = *pos;
1.56      kristaps 1327:                av = mdoc_argv(m, line, tok, &arg, pos, buf);
1.1       kristaps 1328:
1.56      kristaps 1329:                if (ARGV_WORD == av) {
1.32      kristaps 1330:                        *pos = la;
1.1       kristaps 1331:                        break;
                   1332:                }
                   1333:
1.56      kristaps 1334:                if (ARGV_EOLN == av)
1.1       kristaps 1335:                        break;
1.56      kristaps 1336:                if (ARGV_ARG == av)
1.1       kristaps 1337:                        continue;
                   1338:
                   1339:                mdoc_argv_free(arg);
                   1340:                return(0);
                   1341:        }
                   1342:
1.46      kristaps 1343:        for (flushed = j = 0; ; ) {
1.32      kristaps 1344:                la = *pos;
1.53      kristaps 1345:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps 1346:
1.53      kristaps 1347:                if (ARGS_ERROR == ac)
1.1       kristaps 1348:                        return(0);
1.53      kristaps 1349:                if (ARGS_PUNCT == ac)
1.1       kristaps 1350:                        break;
1.53      kristaps 1351:                if (ARGS_EOLN == ac)
1.1       kristaps 1352:                        break;
                   1353:
1.46      kristaps 1354:                if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) &&
1.53      kristaps 1355:                                ARGS_QWORD != ac &&
1.46      kristaps 1356:                                0 == j && 1 == mdoc_isdelim(p)) {
                   1357:                        if ( ! mdoc_word_alloc(m, line, la, p))
                   1358:                                return(0);
                   1359:                        continue;
                   1360:                } else if (0 == j)
                   1361:                       if ( ! mdoc_elem_alloc(m, line, la, tok, arg))
                   1362:                               return(0);
                   1363:
                   1364:                if (j == maxargs && ! flushed) {
                   1365:                        if ( ! rew_elem(m, tok))
                   1366:                                return(0);
                   1367:                        flushed = 1;
                   1368:                }
                   1369:
1.54      kristaps 1370:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1371:
                   1372:                if (MDOC_MAX != ntok) {
1.32      kristaps 1373:                        if ( ! flushed && ! rew_elem(m, tok))
1.1       kristaps 1374:                                return(0);
                   1375:                        flushed = 1;
1.53      kristaps 1376:                        if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1.1       kristaps 1377:                                return(0);
1.46      kristaps 1378:                        j++;
1.1       kristaps 1379:                        break;
                   1380:                }
                   1381:
                   1382:                if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) &&
1.53      kristaps 1383:                                ARGS_QWORD != ac &&
1.1       kristaps 1384:                                ! flushed && mdoc_isdelim(p)) {
1.32      kristaps 1385:                        if ( ! rew_elem(m, tok))
1.1       kristaps 1386:                                return(0);
                   1387:                        flushed = 1;
                   1388:                }
1.42      kristaps 1389:
                   1390:                /*
                   1391:                 * XXX: this is a hack to work around groff's ugliness
                   1392:                 * as regards `Xr' and extraneous arguments.  It should
                   1393:                 * ideally be deprecated behaviour, but because this is
                   1394:                 * code is no here, it's unlikely to be removed.
                   1395:                 */
1.43      kristaps 1396:
1.46      kristaps 1397: #ifdef __OpenBSD__
1.42      kristaps 1398:                if (MDOC_Xr == tok && j == maxargs) {
1.46      kristaps 1399:                        if ( ! mdoc_elem_alloc(m, line, la, MDOC_Ns, NULL))
1.42      kristaps 1400:                                return(0);
                   1401:                        if ( ! rew_elem(m, MDOC_Ns))
                   1402:                                return(0);
                   1403:                }
1.46      kristaps 1404: #endif
1.42      kristaps 1405:
1.32      kristaps 1406:                if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps 1407:                        return(0);
1.46      kristaps 1408:                j++;
1.1       kristaps 1409:        }
                   1410:
1.46      kristaps 1411:        if (0 == j && ! mdoc_elem_alloc(m, line, la, tok, arg))
                   1412:               return(0);
                   1413:
                   1414:        /* Close out in a consistent state. */
1.32      kristaps 1415:
                   1416:        if ( ! flushed && ! rew_elem(m, tok))
1.1       kristaps 1417:                return(0);
                   1418:
                   1419:        if (ppos > 1)
                   1420:                return(1);
1.32      kristaps 1421:        return(append_delims(m, line, pos, buf));
1.1       kristaps 1422: }
                   1423:
                   1424:
                   1425: static int
                   1426: in_line_eoln(MACRO_PROT_ARGS)
                   1427: {
1.56      kristaps 1428:        int              la;
1.55      kristaps 1429:        enum margserr    ac;
1.56      kristaps 1430:        enum margverr    av;
1.53      kristaps 1431:        struct mdoc_arg *arg;
                   1432:        char            *p;
                   1433:        enum mdoct       ntok;
1.1       kristaps 1434:
                   1435:        assert( ! (MDOC_PARSED & mdoc_macros[tok].flags));
                   1436:
1.32      kristaps 1437:        /* Parse macro arguments. */
1.1       kristaps 1438:
1.32      kristaps 1439:        for (arg = NULL; ; ) {
1.1       kristaps 1440:                la = *pos;
1.56      kristaps 1441:                av = mdoc_argv(m, line, tok, &arg, pos, buf);
1.1       kristaps 1442:
1.56      kristaps 1443:                if (ARGV_WORD == av) {
1.1       kristaps 1444:                        *pos = la;
                   1445:                        break;
                   1446:                }
1.56      kristaps 1447:                if (ARGV_EOLN == av)
1.1       kristaps 1448:                        break;
1.56      kristaps 1449:                if (ARGV_ARG == av)
1.1       kristaps 1450:                        continue;
                   1451:
                   1452:                mdoc_argv_free(arg);
                   1453:                return(0);
                   1454:        }
                   1455:
1.32      kristaps 1456:        /* Open element scope. */
                   1457:
                   1458:        if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
1.1       kristaps 1459:                return(0);
                   1460:
1.32      kristaps 1461:        /* Parse argument terms. */
1.1       kristaps 1462:
                   1463:        for (;;) {
                   1464:                la = *pos;
1.53      kristaps 1465:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps 1466:
1.53      kristaps 1467:                if (ARGS_ERROR == ac)
1.1       kristaps 1468:                        return(0);
1.53      kristaps 1469:                if (ARGS_EOLN == ac)
1.1       kristaps 1470:                        break;
                   1471:
1.53      kristaps 1472:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1.1       kristaps 1473:
1.53      kristaps 1474:                if (MDOC_MAX == ntok) {
                   1475:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps 1476:                                return(0);
1.53      kristaps 1477:                        continue;
                   1478:                }
1.1       kristaps 1479:
1.53      kristaps 1480:                if ( ! rew_elem(m, tok))
1.1       kristaps 1481:                        return(0);
1.53      kristaps 1482:                return(mdoc_macro(m, ntok, line, la, pos, buf));
1.1       kristaps 1483:        }
                   1484:
1.32      kristaps 1485:        /* Close out (no delimiters). */
                   1486:
                   1487:        return(rew_elem(m, tok));
1.1       kristaps 1488: }
                   1489:
                   1490:
                   1491: /* ARGSUSED */
                   1492: static int
1.41      kristaps 1493: ctx_synopsis(MACRO_PROT_ARGS)
                   1494: {
                   1495:
                   1496:        /* If we're not in the SYNOPSIS, go straight to in-line. */
                   1497:        if (SEC_SYNOPSIS != m->lastsec)
                   1498:                return(in_line(m, tok, line, ppos, pos, buf));
                   1499:
                   1500:        /* If we're a nested call, same place. */
                   1501:        if (ppos > 1)
                   1502:                return(in_line(m, tok, line, ppos, pos, buf));
                   1503:
                   1504:        /*
                   1505:         * XXX: this will open a block scope; however, if later we end
                   1506:         * up formatting the block scope, then child nodes will inherit
                   1507:         * the formatting.  Be careful.
                   1508:         */
                   1509:
                   1510:        return(blk_part_imp(m, tok, line, ppos, pos, buf));
                   1511: }
                   1512:
                   1513:
                   1514: /* ARGSUSED */
                   1515: static int
1.1       kristaps 1516: obsolete(MACRO_PROT_ARGS)
                   1517: {
                   1518:
1.32      kristaps 1519:        return(mdoc_pwarn(m, line, ppos, EOBS));
1.1       kristaps 1520: }
                   1521:
                   1522:
1.24      kristaps 1523: /*
                   1524:  * Phrases occur within `Bl -column' entries, separated by `Ta' or tabs.
                   1525:  * They're unusual because they're basically free-form text until a
                   1526:  * macro is encountered.
                   1527:  */
1.1       kristaps 1528: static int
1.59    ! kristaps 1529: phrase(struct mdoc *m, int line, int ppos, char *buf,
        !          1530:                enum margserr ac, int count)
1.1       kristaps 1531: {
1.53      kristaps 1532:        int              la, pos;
1.59    ! kristaps 1533:        enum margserr    aac;
1.53      kristaps 1534:        enum mdoct       ntok;
                   1535:        char            *p;
1.1       kristaps 1536:
1.59    ! kristaps 1537:        assert(ARGS_PHRASE == ac ||
        !          1538:                        ARGS_PEND == ac ||
        !          1539:                        ARGS_PPHRASE == ac);
        !          1540:
        !          1541:        if (count && ARGS_PPHRASE == ac)
        !          1542:                return(mdoc_word_alloc(m, line, ppos, &buf[ppos]));
        !          1543:
1.24      kristaps 1544:        for (pos = ppos; ; ) {
                   1545:                la = pos;
1.1       kristaps 1546:
1.24      kristaps 1547:                /* Note: no calling context! */
1.59    ! kristaps 1548:                aac = mdoc_zargs(m, line, &pos, buf, 0, &p);
1.1       kristaps 1549:
1.59    ! kristaps 1550:                if (ARGS_ERROR == aac)
1.24      kristaps 1551:                        return(0);
1.59    ! kristaps 1552:                if (ARGS_EOLN == aac)
1.24      kristaps 1553:                        break;
1.1       kristaps 1554:
1.59    ! kristaps 1555:                ntok = ARGS_QWORD == aac || ARGS_PEND == ac ?
        !          1556:                        MDOC_MAX : lookup_raw(p);
1.1       kristaps 1557:
1.53      kristaps 1558:                if (MDOC_MAX == ntok) {
                   1559:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps 1560:                                return(0);
1.53      kristaps 1561:                        continue;
                   1562:                }
1.1       kristaps 1563:
1.53      kristaps 1564:                if ( ! mdoc_macro(m, ntok, line, la, &pos, buf))
1.1       kristaps 1565:                        return(0);
1.53      kristaps 1566:                return(append_delims(m, line, &pos, buf));
1.1       kristaps 1567:        }
                   1568:
                   1569:        return(1);
                   1570: }
1.24      kristaps 1571:
                   1572:

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