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Annotation of mandoc/mdoc_macro.c, Revision 1.57

1.57    ! kristaps    1: /*     $Id: mdoc_macro.c,v 1.56 2010/05/07 05:54:09 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 *);
                     48: static enum mdoct      lookup(int, const char *);
                     49: static enum mdoct      lookup_raw(const char *);
                     50: static int             phrase(struct mdoc *, int, int, char *);
                     51: static enum mdoct      rew_alt(enum mdoct);
                     52: static int             rew_dobreak(enum mdoct,
                     53:                                const struct mdoc_node *);
                     54: static enum rew        rew_dohalt(enum mdoct, enum mdoc_type,
                     55:                                const struct mdoc_node *);
                     56: static int             rew_elem(struct mdoc *, enum mdoct);
                     57: static int             rew_last(struct mdoc *,
                     58:                                const struct mdoc_node *);
                     59: static int             rew_sub(enum mdoc_type, struct mdoc *,
                     60:                                enum mdoct, int, int);
                     61: static int             swarn(struct mdoc *, enum mdoc_type, int,
                     62:                                int, const struct mdoc_node *);
1.1       kristaps   63:
                     64: const  struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
1.13      kristaps   65:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ap */
1.1       kristaps   66:        { in_line_eoln, MDOC_PROLOGUE }, /* Dd */
                     67:        { in_line_eoln, MDOC_PROLOGUE }, /* Dt */
                     68:        { in_line_eoln, MDOC_PROLOGUE }, /* Os */
                     69:        { blk_full, 0 }, /* Sh */
                     70:        { blk_full, 0 }, /* Ss */
1.21      kristaps   71:        { in_line_eoln, 0 }, /* Pp */
1.1       kristaps   72:        { blk_part_imp, MDOC_PARSED }, /* D1 */
                     73:        { blk_part_imp, MDOC_PARSED }, /* Dl */
                     74:        { blk_full, MDOC_EXPLICIT }, /* Bd */
                     75:        { blk_exp_close, MDOC_EXPLICIT }, /* Ed */
                     76:        { blk_full, MDOC_EXPLICIT }, /* Bl */
                     77:        { blk_exp_close, MDOC_EXPLICIT }, /* El */
                     78:        { blk_full, MDOC_PARSED }, /* It */
                     79:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ad */
1.10      kristaps   80:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* An */
1.1       kristaps   81:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ar */
1.23      kristaps   82:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cd */
1.1       kristaps   83:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Cm */
                     84:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Dv */
                     85:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Er */
                     86:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ev */
                     87:        { in_line_eoln, 0 }, /* Ex */
                     88:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fa */
                     89:        { in_line_eoln, 0 }, /* Fd */
                     90:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fl */
                     91:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Fn */
1.11      kristaps   92:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ft */
1.1       kristaps   93:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ic */
1.18      kristaps   94:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* In */
1.1       kristaps   95:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Li */
1.19      kristaps   96:        { blk_full, 0 }, /* Nd */
1.1       kristaps   97:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Nm */
                     98:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Op */
                     99:        { obsolete, 0 }, /* Ot */
                    100:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Pa */
                    101:        { in_line_eoln, 0 }, /* Rv */
                    102:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* St */
                    103:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Va */
1.41      kristaps  104:        { ctx_synopsis, MDOC_CALLABLE | MDOC_PARSED }, /* Vt */
1.42      kristaps  105:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Xr */
1.1       kristaps  106:        { in_line_eoln, 0 }, /* %A */
                    107:        { in_line_eoln, 0 }, /* %B */
                    108:        { in_line_eoln, 0 }, /* %D */
                    109:        { in_line_eoln, 0 }, /* %I */
                    110:        { in_line_eoln, 0 }, /* %J */
                    111:        { in_line_eoln, 0 }, /* %N */
                    112:        { in_line_eoln, 0 }, /* %O */
                    113:        { in_line_eoln, 0 }, /* %P */
                    114:        { in_line_eoln, 0 }, /* %R */
                    115:        { in_line_eoln, 0 }, /* %T */
                    116:        { in_line_eoln, 0 }, /* %V */
                    117:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ac */
                    118:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Ao */
                    119:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Aq */
                    120:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* At */
                    121:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Bc */
                    122:        { blk_full, MDOC_EXPLICIT }, /* Bf */
                    123:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Bo */
                    124:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Bq */
                    125:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bsx */
                    126:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Bx */
                    127:        { in_line_eoln, 0 }, /* Db */
                    128:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Dc */
                    129:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Do */
                    130:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Dq */
                    131:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ec */
                    132:        { blk_exp_close, MDOC_EXPLICIT }, /* Ef */
                    133:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Em */
                    134:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Eo */
                    135:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Fx */
1.11      kristaps  136:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ms */
1.1       kristaps  137:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* No */
                    138:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ns */
                    139:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Nx */
                    140:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ox */
                    141:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Pc */
1.52      kristaps  142:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED | MDOC_IGNDELIM }, /* Pf */
1.1       kristaps  143:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Po */
                    144:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Pq */
                    145:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Qc */
                    146:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Ql */
                    147:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Qo */
                    148:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Qq */
                    149:        { blk_exp_close, MDOC_EXPLICIT }, /* Re */
                    150:        { blk_full, MDOC_EXPLICIT }, /* Rs */
                    151:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Sc */
                    152:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* So */
                    153:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Sq */
                    154:        { in_line_eoln, 0 }, /* Sm */
                    155:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Sx */
                    156:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Sy */
                    157:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Tn */
                    158:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Ux */
                    159:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Xc */
                    160:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Xo */
                    161:        { blk_full, MDOC_EXPLICIT | MDOC_CALLABLE }, /* Fo */
                    162:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Fc */
                    163:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Oo */
                    164:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Oc */
                    165:        { blk_full, MDOC_EXPLICIT }, /* Bk */
                    166:        { blk_exp_close, MDOC_EXPLICIT }, /* Ek */
                    167:        { in_line_eoln, 0 }, /* Bt */
                    168:        { in_line_eoln, 0 }, /* Hf */
                    169:        { obsolete, 0 }, /* Fr */
                    170:        { in_line_eoln, 0 }, /* Ud */
                    171:        { in_line_eoln, 0 }, /* Lb */
1.21      kristaps  172:        { in_line_eoln, 0 }, /* Lp */
1.12      kristaps  173:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Lk */
                    174:        { in_line, MDOC_CALLABLE | MDOC_PARSED }, /* Mt */
1.1       kristaps  175:        { blk_part_imp, MDOC_CALLABLE | MDOC_PARSED }, /* Brq */
                    176:        { blk_part_exp, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Bro */
                    177:        { blk_exp_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Brc */
                    178:        { in_line_eoln, 0 }, /* %C */
                    179:        { obsolete, 0 }, /* Es */
                    180:        { obsolete, 0 }, /* En */
                    181:        { in_line_argn, MDOC_CALLABLE | MDOC_PARSED }, /* Dx */
                    182:        { in_line_eoln, 0 }, /* %Q */
1.20      kristaps  183:        { in_line_eoln, 0 }, /* br */
                    184:        { in_line_eoln, 0 }, /* sp */
1.37      kristaps  185:        { in_line_eoln, 0 }, /* %U */
1.1       kristaps  186: };
                    187:
                    188: const  struct mdoc_macro * const mdoc_macros = __mdoc_macros;
                    189:
                    190:
                    191: static int
                    192: swarn(struct mdoc *mdoc, enum mdoc_type type,
                    193:                int line, int pos, const struct mdoc_node *p)
                    194: {
                    195:        const char      *n, *t, *tt;
                    196:
                    197:        n = t = "<root>";
                    198:        tt = "block";
                    199:
                    200:        switch (type) {
                    201:        case (MDOC_BODY):
                    202:                tt = "multi-line";
                    203:                break;
                    204:        case (MDOC_HEAD):
                    205:                tt = "line";
                    206:                break;
                    207:        default:
                    208:                break;
                    209:        }
                    210:
                    211:        switch (p->type) {
                    212:        case (MDOC_BLOCK):
                    213:                n = mdoc_macronames[p->tok];
                    214:                t = "block";
                    215:                break;
                    216:        case (MDOC_BODY):
                    217:                n = mdoc_macronames[p->tok];
                    218:                t = "multi-line";
                    219:                break;
                    220:        case (MDOC_HEAD):
                    221:                n = mdoc_macronames[p->tok];
                    222:                t = "line";
                    223:                break;
                    224:        default:
                    225:                break;
                    226:        }
                    227:
                    228:        if ( ! (MDOC_IGN_SCOPE & mdoc->pflags))
1.16      kristaps  229:                return(mdoc_verr(mdoc, line, pos,
1.1       kristaps  230:                                "%s scope breaks %s scope of %s",
                    231:                                tt, t, n));
1.16      kristaps  232:        return(mdoc_vwarn(mdoc, line, pos,
1.1       kristaps  233:                                "%s scope breaks %s scope of %s",
                    234:                                tt, t, n));
                    235: }
                    236:
                    237:
                    238: /*
                    239:  * This is called at the end of parsing.  It must traverse up the tree,
                    240:  * closing out open [implicit] scopes.  Obviously, open explicit scopes
                    241:  * are errors.
                    242:  */
                    243: int
1.32      kristaps  244: mdoc_macroend(struct mdoc *m)
1.1       kristaps  245: {
                    246:        struct mdoc_node *n;
                    247:
                    248:        /* Scan for open explicit scopes. */
                    249:
1.32      kristaps  250:        n = MDOC_VALID & m->last->flags ?  m->last->parent : m->last;
1.1       kristaps  251:
                    252:        for ( ; n; n = n->parent) {
                    253:                if (MDOC_BLOCK != n->type)
                    254:                        continue;
                    255:                if ( ! (MDOC_EXPLICIT & mdoc_macros[n->tok].flags))
                    256:                        continue;
1.32      kristaps  257:                return(mdoc_nerr(m, n, EOPEN));
1.1       kristaps  258:        }
                    259:
1.32      kristaps  260:        /* Rewind to the first. */
                    261:
                    262:        return(rew_last(m, m->first));
1.1       kristaps  263: }
                    264:
1.32      kristaps  265:
                    266: /*
                    267:  * Look up a macro from within a subsequent context.
                    268:  */
1.53      kristaps  269: static enum mdoct
1.35      kristaps  270: lookup(int from, const char *p)
1.28      kristaps  271: {
1.36      kristaps  272:        /* FIXME: make -diag lists be un-PARSED. */
1.28      kristaps  273:
                    274:        if ( ! (MDOC_PARSED & mdoc_macros[from].flags))
                    275:                return(MDOC_MAX);
1.35      kristaps  276:        return(lookup_raw(p));
1.28      kristaps  277: }
                    278:
                    279:
1.32      kristaps  280: /*
                    281:  * Lookup a macro following the initial line macro.
                    282:  */
1.53      kristaps  283: static enum mdoct
1.35      kristaps  284: lookup_raw(const char *p)
1.1       kristaps  285: {
                    286:        int              res;
                    287:
1.34      kristaps  288:        if (MDOC_MAX == (res = mdoc_hash_find(p)))
1.28      kristaps  289:                return(MDOC_MAX);
                    290:        if (MDOC_CALLABLE & mdoc_macros[res].flags)
1.1       kristaps  291:                return(res);
                    292:        return(MDOC_MAX);
                    293: }
                    294:
                    295:
                    296: static int
1.32      kristaps  297: rew_last(struct mdoc *mdoc, const struct mdoc_node *to)
1.1       kristaps  298: {
                    299:
                    300:        assert(to);
                    301:        mdoc->next = MDOC_NEXT_SIBLING;
                    302:
                    303:        /* LINTED */
                    304:        while (mdoc->last != to) {
                    305:                if ( ! mdoc_valid_post(mdoc))
                    306:                        return(0);
                    307:                if ( ! mdoc_action_post(mdoc))
                    308:                        return(0);
                    309:                mdoc->last = mdoc->last->parent;
                    310:                assert(mdoc->last);
                    311:        }
                    312:
                    313:        if ( ! mdoc_valid_post(mdoc))
                    314:                return(0);
                    315:        return(mdoc_action_post(mdoc));
                    316: }
                    317:
                    318:
1.32      kristaps  319: /*
                    320:  * Return the opening macro of a closing one, e.g., `Ec' has `Eo' as its
                    321:  * matching pair.
                    322:  */
1.47      kristaps  323: static enum mdoct
                    324: rew_alt(enum mdoct tok)
1.1       kristaps  325: {
                    326:        switch (tok) {
                    327:        case (MDOC_Ac):
                    328:                return(MDOC_Ao);
                    329:        case (MDOC_Bc):
                    330:                return(MDOC_Bo);
                    331:        case (MDOC_Brc):
                    332:                return(MDOC_Bro);
                    333:        case (MDOC_Dc):
                    334:                return(MDOC_Do);
                    335:        case (MDOC_Ec):
                    336:                return(MDOC_Eo);
                    337:        case (MDOC_Ed):
                    338:                return(MDOC_Bd);
                    339:        case (MDOC_Ef):
                    340:                return(MDOC_Bf);
                    341:        case (MDOC_Ek):
                    342:                return(MDOC_Bk);
                    343:        case (MDOC_El):
                    344:                return(MDOC_Bl);
                    345:        case (MDOC_Fc):
                    346:                return(MDOC_Fo);
                    347:        case (MDOC_Oc):
                    348:                return(MDOC_Oo);
                    349:        case (MDOC_Pc):
                    350:                return(MDOC_Po);
                    351:        case (MDOC_Qc):
                    352:                return(MDOC_Qo);
                    353:        case (MDOC_Re):
                    354:                return(MDOC_Rs);
                    355:        case (MDOC_Sc):
                    356:                return(MDOC_So);
                    357:        case (MDOC_Xc):
                    358:                return(MDOC_Xo);
                    359:        default:
                    360:                break;
                    361:        }
                    362:        abort();
                    363:        /* NOTREACHED */
                    364: }
                    365:
                    366:
                    367: /*
                    368:  * Rewind rules.  This indicates whether to stop rewinding
                    369:  * (REWIND_HALT) without touching our current scope, stop rewinding and
                    370:  * close our current scope (REWIND_REWIND), or continue (REWIND_NOHALT).
                    371:  * The scope-closing and so on occurs in the various rew_* routines.
                    372:  */
1.51      kristaps  373: static enum rew
1.47      kristaps  374: rew_dohalt(enum mdoct tok, enum mdoc_type type,
                    375:                const struct mdoc_node *p)
1.1       kristaps  376: {
                    377:
                    378:        if (MDOC_ROOT == p->type)
                    379:                return(REWIND_HALT);
                    380:        if (MDOC_VALID & p->flags)
                    381:                return(REWIND_NOHALT);
                    382:
                    383:        switch (tok) {
                    384:        case (MDOC_Aq):
                    385:                /* FALLTHROUGH */
                    386:        case (MDOC_Bq):
                    387:                /* FALLTHROUGH */
                    388:        case (MDOC_Brq):
                    389:                /* FALLTHROUGH */
                    390:        case (MDOC_D1):
                    391:                /* FALLTHROUGH */
                    392:        case (MDOC_Dl):
                    393:                /* FALLTHROUGH */
                    394:        case (MDOC_Dq):
                    395:                /* FALLTHROUGH */
                    396:        case (MDOC_Op):
                    397:                /* FALLTHROUGH */
                    398:        case (MDOC_Pq):
                    399:                /* FALLTHROUGH */
                    400:        case (MDOC_Ql):
                    401:                /* FALLTHROUGH */
                    402:        case (MDOC_Qq):
                    403:                /* FALLTHROUGH */
                    404:        case (MDOC_Sq):
1.41      kristaps  405:                /* FALLTHROUGH */
                    406:        case (MDOC_Vt):
1.1       kristaps  407:                assert(MDOC_TAIL != type);
                    408:                if (type == p->type && tok == p->tok)
                    409:                        return(REWIND_REWIND);
                    410:                break;
                    411:        case (MDOC_It):
                    412:                assert(MDOC_TAIL != type);
                    413:                if (type == p->type && tok == p->tok)
                    414:                        return(REWIND_REWIND);
                    415:                if (MDOC_BODY == p->type && MDOC_Bl == p->tok)
                    416:                        return(REWIND_HALT);
                    417:                break;
                    418:        case (MDOC_Sh):
                    419:                if (type == p->type && tok == p->tok)
                    420:                        return(REWIND_REWIND);
                    421:                break;
1.19      kristaps  422:        case (MDOC_Nd):
                    423:                /* FALLTHROUGH */
1.1       kristaps  424:        case (MDOC_Ss):
                    425:                assert(MDOC_TAIL != type);
                    426:                if (type == p->type && tok == p->tok)
                    427:                        return(REWIND_REWIND);
                    428:                if (MDOC_BODY == p->type && MDOC_Sh == p->tok)
                    429:                        return(REWIND_HALT);
                    430:                break;
                    431:        case (MDOC_Ao):
                    432:                /* FALLTHROUGH */
                    433:        case (MDOC_Bd):
                    434:                /* FALLTHROUGH */
                    435:        case (MDOC_Bf):
                    436:                /* FALLTHROUGH */
                    437:        case (MDOC_Bk):
                    438:                /* FALLTHROUGH */
                    439:        case (MDOC_Bl):
                    440:                /* FALLTHROUGH */
                    441:        case (MDOC_Bo):
                    442:                /* FALLTHROUGH */
                    443:        case (MDOC_Bro):
                    444:                /* FALLTHROUGH */
                    445:        case (MDOC_Do):
                    446:                /* FALLTHROUGH */
                    447:        case (MDOC_Eo):
                    448:                /* FALLTHROUGH */
                    449:        case (MDOC_Fo):
                    450:                /* FALLTHROUGH */
                    451:        case (MDOC_Oo):
                    452:                /* FALLTHROUGH */
                    453:        case (MDOC_Po):
                    454:                /* FALLTHROUGH */
                    455:        case (MDOC_Qo):
                    456:                /* FALLTHROUGH */
                    457:        case (MDOC_Rs):
                    458:                /* FALLTHROUGH */
                    459:        case (MDOC_So):
                    460:                /* FALLTHROUGH */
                    461:        case (MDOC_Xo):
                    462:                if (type == p->type && tok == p->tok)
                    463:                        return(REWIND_REWIND);
                    464:                break;
                    465:        /* Multi-line explicit scope close. */
                    466:        case (MDOC_Ac):
                    467:                /* FALLTHROUGH */
                    468:        case (MDOC_Bc):
                    469:                /* FALLTHROUGH */
                    470:        case (MDOC_Brc):
                    471:                /* FALLTHROUGH */
                    472:        case (MDOC_Dc):
                    473:                /* FALLTHROUGH */
                    474:        case (MDOC_Ec):
                    475:                /* FALLTHROUGH */
                    476:        case (MDOC_Ed):
                    477:                /* FALLTHROUGH */
                    478:        case (MDOC_Ek):
                    479:                /* FALLTHROUGH */
                    480:        case (MDOC_El):
                    481:                /* FALLTHROUGH */
                    482:        case (MDOC_Fc):
                    483:                /* FALLTHROUGH */
                    484:        case (MDOC_Ef):
                    485:                /* FALLTHROUGH */
                    486:        case (MDOC_Oc):
                    487:                /* FALLTHROUGH */
                    488:        case (MDOC_Pc):
                    489:                /* FALLTHROUGH */
                    490:        case (MDOC_Qc):
                    491:                /* FALLTHROUGH */
                    492:        case (MDOC_Re):
                    493:                /* FALLTHROUGH */
                    494:        case (MDOC_Sc):
                    495:                /* FALLTHROUGH */
                    496:        case (MDOC_Xc):
                    497:                if (type == p->type && rew_alt(tok) == p->tok)
                    498:                        return(REWIND_REWIND);
                    499:                break;
                    500:        default:
                    501:                abort();
                    502:                /* NOTREACHED */
                    503:        }
                    504:
                    505:        return(REWIND_NOHALT);
                    506: }
                    507:
                    508:
                    509: /*
                    510:  * See if we can break an encountered scope (the rew_dohalt has returned
                    511:  * REWIND_NOHALT).
                    512:  */
                    513: static int
1.47      kristaps  514: rew_dobreak(enum mdoct tok, const struct mdoc_node *p)
1.1       kristaps  515: {
                    516:
                    517:        assert(MDOC_ROOT != p->type);
                    518:        if (MDOC_ELEM == p->type)
                    519:                return(1);
                    520:        if (MDOC_TEXT == p->type)
                    521:                return(1);
                    522:        if (MDOC_VALID & p->flags)
                    523:                return(1);
                    524:
                    525:        switch (tok) {
                    526:        case (MDOC_It):
                    527:                return(MDOC_It == p->tok);
1.19      kristaps  528:        case (MDOC_Nd):
                    529:                return(MDOC_Nd == p->tok);
1.1       kristaps  530:        case (MDOC_Ss):
                    531:                return(MDOC_Ss == p->tok);
                    532:        case (MDOC_Sh):
1.19      kristaps  533:                if (MDOC_Nd == p->tok)
                    534:                        return(1);
1.1       kristaps  535:                if (MDOC_Ss == p->tok)
                    536:                        return(1);
                    537:                return(MDOC_Sh == p->tok);
                    538:        case (MDOC_El):
                    539:                if (MDOC_It == p->tok)
                    540:                        return(1);
                    541:                break;
                    542:        case (MDOC_Oc):
                    543:                if (MDOC_Op == p->tok)
                    544:                        return(1);
                    545:                break;
                    546:        default:
                    547:                break;
                    548:        }
                    549:
                    550:        if (MDOC_EXPLICIT & mdoc_macros[tok].flags)
                    551:                return(p->tok == rew_alt(tok));
                    552:        else if (MDOC_BLOCK == p->type)
                    553:                return(1);
                    554:
                    555:        return(tok == p->tok);
                    556: }
                    557:
                    558:
                    559: static int
1.47      kristaps  560: rew_elem(struct mdoc *mdoc, enum mdoct tok)
1.1       kristaps  561: {
                    562:        struct mdoc_node *n;
                    563:
                    564:        n = mdoc->last;
                    565:        if (MDOC_ELEM != n->type)
                    566:                n = n->parent;
                    567:        assert(MDOC_ELEM == n->type);
                    568:        assert(tok == n->tok);
                    569:
                    570:        return(rew_last(mdoc, n));
                    571: }
                    572:
                    573:
                    574: static int
1.32      kristaps  575: rew_sub(enum mdoc_type t, struct mdoc *m,
1.47      kristaps  576:                enum mdoct tok, int line, int ppos)
1.1       kristaps  577: {
                    578:        struct mdoc_node *n;
1.51      kristaps  579:        enum rew          c;
1.1       kristaps  580:
                    581:        /* LINTED */
1.32      kristaps  582:        for (n = m->last; n; n = n->parent) {
                    583:                c = rew_dohalt(tok, t, n);
                    584:                if (REWIND_HALT == c) {
                    585:                        if (MDOC_BLOCK != t)
                    586:                                return(1);
                    587:                        if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags))
                    588:                                return(1);
                    589:                        return(mdoc_perr(m, line, ppos, ENOCTX));
                    590:                }
1.1       kristaps  591:                if (REWIND_REWIND == c)
                    592:                        break;
                    593:                else if (rew_dobreak(tok, n))
                    594:                        continue;
1.32      kristaps  595:                if ( ! swarn(m, t, line, ppos, n))
1.1       kristaps  596:                        return(0);
                    597:        }
                    598:
                    599:        assert(n);
1.47      kristaps  600:        if ( ! rew_last(m, n))
                    601:                return(0);
                    602:
                    603: #ifdef UGLY
                    604:        /*
                    605:         * The current block extends an enclosing block beyond a line
                    606:         * break.  Now that the current block ends, close the enclosing
                    607:         * block, too.
                    608:         */
                    609:        if (NULL != (n = n->pending)) {
                    610:                assert(MDOC_HEAD == n->type);
                    611:                if ( ! rew_last(m, n))
                    612:                        return(0);
                    613:                if ( ! mdoc_body_alloc(m, n->line, n->pos, n->tok))
                    614:                        return(0);
                    615:        }
                    616: #endif
                    617:
                    618:        return(1);
1.1       kristaps  619: }
                    620:
                    621:
                    622: static int
                    623: append_delims(struct mdoc *mdoc, int line, int *pos, char *buf)
                    624: {
1.53      kristaps  625:        int              lastarg;
1.55      kristaps  626:        enum margserr    ac;
1.1       kristaps  627:        char            *p;
                    628:
                    629:        if (0 == buf[*pos])
                    630:                return(1);
                    631:
                    632:        for (;;) {
                    633:                lastarg = *pos;
1.53      kristaps  634:                ac = mdoc_zargs(mdoc, line, pos, buf, ARGS_NOWARN, &p);
1.1       kristaps  635:
1.53      kristaps  636:                if (ARGS_ERROR == ac)
1.1       kristaps  637:                        return(0);
1.53      kristaps  638:                else if (ARGS_EOLN == ac)
1.1       kristaps  639:                        break;
                    640:                assert(mdoc_isdelim(p));
                    641:                if ( ! mdoc_word_alloc(mdoc, line, lastarg, p))
                    642:                        return(0);
                    643:        }
                    644:
                    645:        return(1);
                    646: }
                    647:
                    648:
                    649: /*
                    650:  * Close out block partial/full explicit.
                    651:  */
                    652: static int
                    653: blk_exp_close(MACRO_PROT_ARGS)
                    654: {
1.53      kristaps  655:        int              j, lastarg, maxargs, flushed;
1.55      kristaps  656:        enum margserr    ac;
1.53      kristaps  657:        enum mdoct       ntok;
1.1       kristaps  658:        char            *p;
                    659:
                    660:        switch (tok) {
                    661:        case (MDOC_Ec):
                    662:                maxargs = 1;
                    663:                break;
                    664:        default:
                    665:                maxargs = 0;
                    666:                break;
                    667:        }
                    668:
                    669:        if ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags)) {
1.22      kristaps  670:                if (buf[*pos])
1.32      kristaps  671:                        if ( ! mdoc_pwarn(m, line, ppos, ENOLINE))
1.1       kristaps  672:                                return(0);
1.22      kristaps  673:
1.32      kristaps  674:                if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1.22      kristaps  675:                        return(0);
1.32      kristaps  676:                return(rew_sub(MDOC_BLOCK, m, tok, line, ppos));
1.1       kristaps  677:        }
                    678:
1.32      kristaps  679:        if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1.1       kristaps  680:                return(0);
                    681:
1.32      kristaps  682:        if (maxargs > 0)
                    683:                if ( ! mdoc_tail_alloc(m, line, ppos, rew_alt(tok)))
1.1       kristaps  684:                        return(0);
                    685:
1.27      kristaps  686:        for (flushed = j = 0; ; j++) {
1.1       kristaps  687:                lastarg = *pos;
                    688:
                    689:                if (j == maxargs && ! flushed) {
1.32      kristaps  690:                        if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
1.1       kristaps  691:                                return(0);
                    692:                        flushed = 1;
                    693:                }
                    694:
1.53      kristaps  695:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps  696:
1.53      kristaps  697:                if (ARGS_ERROR == ac)
1.1       kristaps  698:                        return(0);
1.53      kristaps  699:                if (ARGS_PUNCT == ac)
1.1       kristaps  700:                        break;
1.53      kristaps  701:                if (ARGS_EOLN == ac)
1.1       kristaps  702:                        break;
                    703:
1.54      kristaps  704:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                    705:
                    706:                if (MDOC_MAX == ntok) {
                    707:                        if ( ! mdoc_word_alloc(m, line, lastarg, p))
1.1       kristaps  708:                                return(0);
1.54      kristaps  709:                        continue;
                    710:                }
1.1       kristaps  711:
1.54      kristaps  712:                if ( ! flushed) {
                    713:                        if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
                    714:                                return(0);
                    715:                        flushed = 1;
                    716:                }
                    717:                if ( ! mdoc_macro(m, ntok, line, lastarg, pos, buf))
1.1       kristaps  718:                        return(0);
1.54      kristaps  719:                break;
1.1       kristaps  720:        }
                    721:
1.32      kristaps  722:        if ( ! flushed && ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
1.1       kristaps  723:                return(0);
                    724:
                    725:        if (ppos > 1)
                    726:                return(1);
1.32      kristaps  727:        return(append_delims(m, line, pos, buf));
1.1       kristaps  728: }
                    729:
                    730:
                    731: static int
                    732: in_line(MACRO_PROT_ARGS)
                    733: {
1.56      kristaps  734:        int              la, lastpunct, cnt, d, nc;
                    735:        enum margverr    av;
1.53      kristaps  736:        enum mdoct       ntok;
1.55      kristaps  737:        enum margserr    ac;
1.53      kristaps  738:        struct mdoc_arg *arg;
                    739:        char            *p;
1.1       kristaps  740:
1.4       kristaps  741:        /*
                    742:         * Whether we allow ignored elements (those without content,
                    743:         * usually because of reserved words) to squeak by.
                    744:         */
1.45      kristaps  745:
1.4       kristaps  746:        switch (tok) {
1.26      kristaps  747:        case (MDOC_An):
                    748:                /* FALLTHROUGH */
                    749:        case (MDOC_Ar):
1.4       kristaps  750:                /* FALLTHROUGH */
                    751:        case (MDOC_Fl):
                    752:                /* FALLTHROUGH */
1.12      kristaps  753:        case (MDOC_Lk):
                    754:                /* FALLTHROUGH */
1.26      kristaps  755:        case (MDOC_Nm):
                    756:                /* FALLTHROUGH */
1.25      kristaps  757:        case (MDOC_Pa):
1.4       kristaps  758:                nc = 1;
                    759:                break;
                    760:        default:
                    761:                nc = 0;
                    762:                break;
                    763:        }
                    764:
1.27      kristaps  765:        for (arg = NULL;; ) {
1.1       kristaps  766:                la = *pos;
1.56      kristaps  767:                av = mdoc_argv(m, line, tok, &arg, pos, buf);
1.1       kristaps  768:
1.56      kristaps  769:                if (ARGV_WORD == av) {
1.1       kristaps  770:                        *pos = la;
                    771:                        break;
                    772:                }
1.56      kristaps  773:                if (ARGV_EOLN == av)
1.1       kristaps  774:                        break;
1.56      kristaps  775:                if (ARGV_ARG == av)
1.1       kristaps  776:                        continue;
                    777:
                    778:                mdoc_argv_free(arg);
                    779:                return(0);
                    780:        }
                    781:
1.4       kristaps  782:        for (cnt = 0, lastpunct = 1;; ) {
1.1       kristaps  783:                la = *pos;
1.53      kristaps  784:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps  785:
1.53      kristaps  786:                if (ARGS_ERROR == ac)
1.1       kristaps  787:                        return(0);
1.53      kristaps  788:                if (ARGS_EOLN == ac)
1.1       kristaps  789:                        break;
1.53      kristaps  790:                if (ARGS_PUNCT == ac)
1.1       kristaps  791:                        break;
                    792:
1.53      kristaps  793:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1.1       kristaps  794:
1.4       kristaps  795:                /*
                    796:                 * In this case, we've located a submacro and must
                    797:                 * execute it.  Close out scope, if open.  If no
                    798:                 * elements have been generated, either create one (nc)
                    799:                 * or raise a warning.
                    800:                 */
1.1       kristaps  801:
1.53      kristaps  802:                if (MDOC_MAX != ntok) {
1.32      kristaps  803:                        if (0 == lastpunct && ! rew_elem(m, tok))
1.1       kristaps  804:                                return(0);
1.4       kristaps  805:                        if (nc && 0 == cnt) {
1.32      kristaps  806:                                if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
1.3       kristaps  807:                                        return(0);
1.32      kristaps  808:                                if ( ! rew_last(m, m->last))
1.12      kristaps  809:                                        return(0);
1.7       kristaps  810:                        } else if ( ! nc && 0 == cnt) {
                    811:                                mdoc_argv_free(arg);
1.32      kristaps  812:                                if ( ! mdoc_pwarn(m, line, ppos, EIGNE))
1.3       kristaps  813:                                        return(0);
1.7       kristaps  814:                        }
1.53      kristaps  815:                        if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1.1       kristaps  816:                                return(0);
                    817:                        if (ppos > 1)
                    818:                                return(1);
1.32      kristaps  819:                        return(append_delims(m, line, pos, buf));
1.29      kristaps  820:                }
1.1       kristaps  821:
1.4       kristaps  822:                /*
                    823:                 * Non-quote-enclosed punctuation.  Set up our scope, if
                    824:                 * a word; rewind the scope, if a delimiter; then append
                    825:                 * the word.
                    826:                 */
1.1       kristaps  827:
1.53      kristaps  828:                d = ARGS_QWORD == ac ? 0 : mdoc_isdelim(p);
1.3       kristaps  829:
1.53      kristaps  830:                if (ARGS_QWORD != ac && d) {
1.32      kristaps  831:                        if (0 == lastpunct && ! rew_elem(m, tok))
1.1       kristaps  832:                                return(0);
                    833:                        lastpunct = 1;
                    834:                } else if (lastpunct) {
1.32      kristaps  835:                        if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
1.1       kristaps  836:                                return(0);
                    837:                        lastpunct = 0;
                    838:                }
                    839:
1.3       kristaps  840:                if ( ! d)
                    841:                        cnt++;
1.32      kristaps  842:                if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps  843:                        return(0);
1.39      kristaps  844:
                    845:                /*
                    846:                 * `Fl' macros have their scope re-opened with each new
                    847:                 * word so that the `-' can be added to each one without
                    848:                 * having to parse out spaces.
                    849:                 */
                    850:                if (0 == lastpunct && MDOC_Fl == tok) {
                    851:                        if ( ! rew_elem(m, tok))
                    852:                                return(0);
                    853:                        lastpunct = 1;
                    854:                }
1.1       kristaps  855:        }
                    856:
1.32      kristaps  857:        if (0 == lastpunct && ! rew_elem(m, tok))
1.1       kristaps  858:                return(0);
1.4       kristaps  859:
                    860:        /*
                    861:         * If no elements have been collected and we're allowed to have
                    862:         * empties (nc), open a scope and close it out.  Otherwise,
                    863:         * raise a warning.
                    864:         */
1.45      kristaps  865:
1.4       kristaps  866:        if (nc && 0 == cnt) {
1.32      kristaps  867:                if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
1.3       kristaps  868:                        return(0);
1.32      kristaps  869:                if ( ! rew_last(m, m->last))
1.12      kristaps  870:                        return(0);
1.7       kristaps  871:        } else if ( ! nc && 0 == cnt) {
                    872:                mdoc_argv_free(arg);
1.32      kristaps  873:                if ( ! mdoc_pwarn(m, line, ppos, EIGNE))
1.3       kristaps  874:                        return(0);
1.7       kristaps  875:        }
1.4       kristaps  876:
1.1       kristaps  877:        if (ppos > 1)
                    878:                return(1);
1.32      kristaps  879:        return(append_delims(m, line, pos, buf));
1.1       kristaps  880: }
                    881:
                    882:
                    883: static int
                    884: blk_full(MACRO_PROT_ARGS)
                    885: {
1.56      kristaps  886:        int               la;
1.1       kristaps  887:        struct mdoc_arg  *arg;
1.45      kristaps  888:        struct mdoc_node *head; /* save of head macro */
1.49      kristaps  889:        struct mdoc_node *body; /* save of body macro */
1.48      kristaps  890: #ifdef UGLY
1.47      kristaps  891:        struct mdoc_node *n;
1.48      kristaps  892: #endif
1.53      kristaps  893:        enum mdoct        ntok;
1.55      kristaps  894:        enum margserr     ac;
1.56      kristaps  895:        enum margverr     av;
1.1       kristaps  896:        char             *p;
                    897:
1.45      kristaps  898:        /* Close out prior implicit scope. */
1.19      kristaps  899:
1.1       kristaps  900:        if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)) {
1.32      kristaps  901:                if ( ! rew_sub(MDOC_BODY, m, tok, line, ppos))
1.1       kristaps  902:                        return(0);
1.32      kristaps  903:                if ( ! rew_sub(MDOC_BLOCK, m, tok, line, ppos))
1.1       kristaps  904:                        return(0);
                    905:        }
                    906:
1.45      kristaps  907:        /*
                    908:         * This routine accomodates implicitly- and explicitly-scoped
                    909:         * macro openings.  Implicit ones first close out prior scope
                    910:         * (seen above).  Delay opening the head until necessary to
                    911:         * allow leading punctuation to print.  Special consideration
                    912:         * for `It -column', which has phrase-part syntax instead of
                    913:         * regular child nodes.
                    914:         */
                    915:
1.1       kristaps  916:        for (arg = NULL;; ) {
1.45      kristaps  917:                la = *pos;
1.56      kristaps  918:                av = mdoc_argv(m, line, tok, &arg, pos, buf);
1.1       kristaps  919:
1.56      kristaps  920:                if (ARGV_WORD == av) {
1.45      kristaps  921:                        *pos = la;
1.1       kristaps  922:                        break;
                    923:                }
                    924:
1.56      kristaps  925:                if (ARGV_EOLN == av)
1.1       kristaps  926:                        break;
1.56      kristaps  927:                if (ARGV_ARG == av)
1.1       kristaps  928:                        continue;
                    929:
                    930:                mdoc_argv_free(arg);
                    931:                return(0);
                    932:        }
                    933:
1.32      kristaps  934:        if ( ! mdoc_block_alloc(m, line, ppos, tok, arg))
1.1       kristaps  935:                return(0);
                    936:
1.49      kristaps  937:        head = body = NULL;
1.1       kristaps  938:
1.45      kristaps  939:        /*
                    940:         * The `Nd' macro has all arguments in its body: it's a hybrid
                    941:         * of block partial-explicit and full-implicit.  Stupid.
                    942:         */
1.19      kristaps  943:
1.45      kristaps  944:        if (MDOC_Nd == tok) {
                    945:                if ( ! mdoc_head_alloc(m, line, ppos, tok))
                    946:                        return(0);
                    947:                head = m->last;
1.32      kristaps  948:                if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.19      kristaps  949:                        return(0);
1.32      kristaps  950:                if ( ! mdoc_body_alloc(m, line, ppos, tok))
1.19      kristaps  951:                        return(0);
1.49      kristaps  952:                body = m->last;
1.19      kristaps  953:        }
                    954:
1.45      kristaps  955:        for (;;) {
                    956:                la = *pos;
1.53      kristaps  957:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps  958:
1.53      kristaps  959:                if (ARGS_ERROR == ac)
1.1       kristaps  960:                        return(0);
1.53      kristaps  961:                if (ARGS_EOLN == ac)
1.1       kristaps  962:                        break;
1.45      kristaps  963:
                    964:                /* Don't emit leading punct. for phrases. */
                    965:
1.53      kristaps  966:                if (NULL == head && ARGS_PHRASE != ac &&
1.57    ! kristaps  967:                                ARGS_PPHRASE != ac &&
1.53      kristaps  968:                                ARGS_QWORD != ac &&
1.45      kristaps  969:                                1 == mdoc_isdelim(p)) {
                    970:                        if ( ! mdoc_word_alloc(m, line, la, p))
                    971:                                return(0);
                    972:                        continue;
                    973:                }
                    974:
                    975:                /* Always re-open head for phrases. */
                    976:
1.57    ! kristaps  977:                if (NULL == head || ARGS_PHRASE == ac ||
        !           978:                                ARGS_PPHRASE == ac) {
1.45      kristaps  979:                        if ( ! mdoc_head_alloc(m, line, ppos, tok))
                    980:                                return(0);
                    981:                        head = m->last;
                    982:                }
                    983:
1.57    ! kristaps  984:                if (ARGS_PHRASE == ac || ARGS_PPHRASE == ac) {
1.45      kristaps  985:                        if ( ! phrase(m, line, la, buf))
1.1       kristaps  986:                                return(0);
1.32      kristaps  987:                        if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.1       kristaps  988:                                return(0);
                    989:                        continue;
                    990:                }
                    991:
1.54      kristaps  992:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                    993:
                    994:                if (MDOC_MAX == ntok) {
1.53      kristaps  995:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps  996:                                return(0);
1.53      kristaps  997:                        continue;
1.45      kristaps  998:                }
1.53      kristaps  999:
                   1000:                if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1.45      kristaps 1001:                        return(0);
1.53      kristaps 1002:                break;
1.45      kristaps 1003:        }
1.1       kristaps 1004:
1.45      kristaps 1005:        if (NULL == head) {
                   1006:                if ( ! mdoc_head_alloc(m, line, ppos, tok))
1.1       kristaps 1007:                        return(0);
1.45      kristaps 1008:                head = m->last;
1.1       kristaps 1009:        }
                   1010:
1.32      kristaps 1011:        if (1 == ppos && ! append_delims(m, line, pos, buf))
1.1       kristaps 1012:                return(0);
1.19      kristaps 1013:
1.49      kristaps 1014:        /* If we've already opened our body, exit now. */
1.45      kristaps 1015:
1.49      kristaps 1016:        if (NULL != body)
1.19      kristaps 1017:                return(1);
                   1018:
1.47      kristaps 1019: #ifdef UGLY
                   1020:        /*
1.49      kristaps 1021:         * If there is an open (i.e., unvalidated) sub-block requiring
                   1022:         * explicit close-out, postpone switching the current block from
                   1023:         * head to body until the rew_sub() call closing out that
                   1024:         * sub-block.
1.47      kristaps 1025:         */
                   1026:        for (n = m->last; n && n != head; n = n->parent) {
1.49      kristaps 1027:                if (MDOC_BLOCK == n->type &&
                   1028:                                MDOC_EXPLICIT & mdoc_macros[n->tok].flags &&
                   1029:                                ! (MDOC_VALID & n->flags)) {
                   1030:                        assert( ! (MDOC_ACTED & n->flags));
1.47      kristaps 1031:                        n->pending = head;
                   1032:                        return(1);
                   1033:                }
                   1034:        }
                   1035: #endif
                   1036:
1.45      kristaps 1037:        /* Close out scopes to remain in a consistent state. */
                   1038:
1.32      kristaps 1039:        if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.1       kristaps 1040:                return(0);
1.32      kristaps 1041:        if ( ! mdoc_body_alloc(m, line, ppos, tok))
1.1       kristaps 1042:                return(0);
                   1043:
                   1044:        return(1);
                   1045: }
                   1046:
                   1047:
                   1048: static int
                   1049: blk_part_imp(MACRO_PROT_ARGS)
                   1050: {
1.53      kristaps 1051:        int               la;
                   1052:        enum mdoct        ntok;
1.55      kristaps 1053:        enum margserr     ac;
1.1       kristaps 1054:        char             *p;
1.43      kristaps 1055:        struct mdoc_node *blk; /* saved block context */
                   1056:        struct mdoc_node *body; /* saved body context */
                   1057:        struct mdoc_node *n;
1.1       kristaps 1058:
1.43      kristaps 1059:        /*
                   1060:         * A macro that spans to the end of the line.  This is generally
                   1061:         * (but not necessarily) called as the first macro.  The block
                   1062:         * has a head as the immediate child, which is always empty,
                   1063:         * followed by zero or more opening punctuation nodes, then the
                   1064:         * body (which may be empty, depending on the macro), then zero
                   1065:         * or more closing punctuation nodes.
                   1066:         */
1.32      kristaps 1067:
                   1068:        if ( ! mdoc_block_alloc(m, line, ppos, tok, NULL))
                   1069:                return(0);
1.43      kristaps 1070:
1.32      kristaps 1071:        blk = m->last;
1.43      kristaps 1072:
1.32      kristaps 1073:        if ( ! mdoc_head_alloc(m, line, ppos, tok))
1.1       kristaps 1074:                return(0);
1.32      kristaps 1075:        if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.1       kristaps 1076:                return(0);
                   1077:
1.43      kristaps 1078:        /*
                   1079:         * Open the body scope "on-demand", that is, after we've
                   1080:         * processed all our the leading delimiters (open parenthesis,
                   1081:         * etc.).
                   1082:         */
1.1       kristaps 1083:
1.43      kristaps 1084:        for (body = NULL; ; ) {
1.32      kristaps 1085:                la = *pos;
1.53      kristaps 1086:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.43      kristaps 1087:
1.53      kristaps 1088:                if (ARGS_ERROR == ac)
1.1       kristaps 1089:                        return(0);
1.53      kristaps 1090:                if (ARGS_EOLN == ac)
1.43      kristaps 1091:                        break;
1.53      kristaps 1092:                if (ARGS_PUNCT == ac)
1.1       kristaps 1093:                        break;
                   1094:
1.53      kristaps 1095:                if (NULL == body && ARGS_QWORD != ac &&
1.50      kristaps 1096:                                1 == mdoc_isdelim(p)) {
1.32      kristaps 1097:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps 1098:                                return(0);
                   1099:                        continue;
                   1100:                }
                   1101:
1.43      kristaps 1102:                if (NULL == body) {
                   1103:                       if ( ! mdoc_body_alloc(m, line, ppos, tok))
                   1104:                               return(0);
                   1105:                        body = m->last;
                   1106:                }
                   1107:
1.54      kristaps 1108:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1109:
                   1110:                if (MDOC_MAX == ntok) {
1.53      kristaps 1111:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.43      kristaps 1112:                                return(0);
1.53      kristaps 1113:                        continue;
                   1114:                }
1.43      kristaps 1115:
1.53      kristaps 1116:                if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1.1       kristaps 1117:                        return(0);
1.53      kristaps 1118:                break;
1.1       kristaps 1119:        }
                   1120:
1.43      kristaps 1121:        /* Clean-ups to leave in a consistent state. */
                   1122:
1.44      kristaps 1123:        if (NULL == body) {
                   1124:                if ( ! mdoc_body_alloc(m, line, ppos, tok))
                   1125:                        return(0);
                   1126:                body = m->last;
                   1127:        }
1.43      kristaps 1128:
1.32      kristaps 1129:        /*
                   1130:         * If we can't rewind to our body, then our scope has already
                   1131:         * been closed by another macro (like `Oc' closing `Op').  This
                   1132:         * is ugly behaviour nodding its head to OpenBSD's overwhelming
1.47      kristaps 1133:         * crufty use of `Op' breakage.
1.1       kristaps 1134:         */
1.32      kristaps 1135:        for (n = m->last; n; n = n->parent)
1.1       kristaps 1136:                if (body == n)
                   1137:                        break;
1.43      kristaps 1138:
1.32      kristaps 1139:        if (NULL == n && ! mdoc_nwarn(m, body, EIMPBRK))
                   1140:                return(0);
1.43      kristaps 1141:
1.32      kristaps 1142:        if (n && ! rew_last(m, body))
                   1143:                return(0);
1.1       kristaps 1144:
1.32      kristaps 1145:        /* Standard appending of delimiters. */
1.1       kristaps 1146:
1.32      kristaps 1147:        if (1 == ppos && ! append_delims(m, line, pos, buf))
1.1       kristaps 1148:                return(0);
                   1149:
1.32      kristaps 1150:        /* Rewind scope, if applicable. */
1.1       kristaps 1151:
1.32      kristaps 1152:        if (n && ! rew_last(m, blk))
1.1       kristaps 1153:                return(0);
                   1154:
                   1155:        return(1);
                   1156: }
                   1157:
                   1158:
                   1159: static int
                   1160: blk_part_exp(MACRO_PROT_ARGS)
                   1161: {
1.53      kristaps 1162:        int               la;
1.55      kristaps 1163:        enum margserr     ac;
1.43      kristaps 1164:        struct mdoc_node *head; /* keep track of head */
                   1165:        struct mdoc_node *body; /* keep track of body */
1.1       kristaps 1166:        char             *p;
1.53      kristaps 1167:        enum mdoct        ntok;
1.1       kristaps 1168:
1.43      kristaps 1169:        /*
                   1170:         * The opening of an explicit macro having zero or more leading
                   1171:         * punctuation nodes; a head with optional single element (the
                   1172:         * case of `Eo'); and a body that may be empty.
                   1173:         */
1.32      kristaps 1174:
                   1175:        if ( ! mdoc_block_alloc(m, line, ppos, tok, NULL))
1.1       kristaps 1176:                return(0);
1.32      kristaps 1177:
1.43      kristaps 1178:        for (head = body = NULL; ; ) {
1.32      kristaps 1179:                la = *pos;
1.53      kristaps 1180:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps 1181:
1.53      kristaps 1182:                if (ARGS_ERROR == ac)
1.1       kristaps 1183:                        return(0);
1.53      kristaps 1184:                if (ARGS_PUNCT == ac)
1.1       kristaps 1185:                        break;
1.53      kristaps 1186:                if (ARGS_EOLN == ac)
1.1       kristaps 1187:                        break;
1.43      kristaps 1188:
                   1189:                /* Flush out leading punctuation. */
                   1190:
1.53      kristaps 1191:                if (NULL == head && ARGS_QWORD != ac &&
1.50      kristaps 1192:                                1 == mdoc_isdelim(p)) {
1.43      kristaps 1193:                        assert(NULL == body);
                   1194:                        if ( ! mdoc_word_alloc(m, line, la, p))
                   1195:                                return(0);
                   1196:                        continue;
                   1197:                }
                   1198:
                   1199:                if (NULL == head) {
                   1200:                        assert(NULL == body);
                   1201:                        if ( ! mdoc_head_alloc(m, line, ppos, tok))
1.1       kristaps 1202:                                return(0);
1.43      kristaps 1203:                        head = m->last;
1.1       kristaps 1204:                }
                   1205:
1.43      kristaps 1206:                /*
                   1207:                 * `Eo' gobbles any data into the head, but most other
                   1208:                 * macros just immediately close out and begin the body.
                   1209:                 */
                   1210:
                   1211:                if (NULL == body) {
                   1212:                        assert(head);
                   1213:                        /* No check whether it's a macro! */
                   1214:                        if (MDOC_Eo == tok)
                   1215:                                if ( ! mdoc_word_alloc(m, line, la, p))
                   1216:                                        return(0);
                   1217:
1.32      kristaps 1218:                        if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.1       kristaps 1219:                                return(0);
1.32      kristaps 1220:                        if ( ! mdoc_body_alloc(m, line, ppos, tok))
1.1       kristaps 1221:                                return(0);
1.43      kristaps 1222:                        body = m->last;
                   1223:
                   1224:                        if (MDOC_Eo == tok)
                   1225:                                continue;
1.1       kristaps 1226:                }
1.43      kristaps 1227:
                   1228:                assert(NULL != head && NULL != body);
                   1229:
1.54      kristaps 1230:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1231:
                   1232:                if (MDOC_MAX == ntok) {
1.53      kristaps 1233:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.43      kristaps 1234:                                return(0);
1.53      kristaps 1235:                        continue;
1.43      kristaps 1236:                }
                   1237:
1.53      kristaps 1238:                if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1.1       kristaps 1239:                        return(0);
1.53      kristaps 1240:                break;
1.1       kristaps 1241:        }
                   1242:
1.43      kristaps 1243:        /* Clean-up to leave in a consistent state. */
1.32      kristaps 1244:
1.43      kristaps 1245:        if (NULL == head) {
                   1246:                if ( ! mdoc_head_alloc(m, line, ppos, tok))
                   1247:                        return(0);
                   1248:                head = m->last;
                   1249:        }
                   1250:
                   1251:        if (NULL == body) {
1.32      kristaps 1252:                if ( ! rew_sub(MDOC_HEAD, m, tok, line, ppos))
1.1       kristaps 1253:                        return(0);
1.32      kristaps 1254:                if ( ! mdoc_body_alloc(m, line, ppos, tok))
1.1       kristaps 1255:                        return(0);
1.43      kristaps 1256:                body = m->last;
1.1       kristaps 1257:        }
                   1258:
1.32      kristaps 1259:        /* Standard appending of delimiters. */
                   1260:
1.1       kristaps 1261:        if (ppos > 1)
                   1262:                return(1);
1.43      kristaps 1263:
1.32      kristaps 1264:        return(append_delims(m, line, pos, buf));
1.1       kristaps 1265: }
                   1266:
                   1267:
                   1268: static int
                   1269: in_line_argn(MACRO_PROT_ARGS)
                   1270: {
1.56      kristaps 1271:        int              la, flushed, j, maxargs;
1.55      kristaps 1272:        enum margserr    ac;
1.56      kristaps 1273:        enum margverr    av;
1.53      kristaps 1274:        struct mdoc_arg *arg;
                   1275:        char            *p;
                   1276:        enum mdoct       ntok;
1.1       kristaps 1277:
1.46      kristaps 1278:        /*
                   1279:         * A line macro that has a fixed number of arguments (maxargs).
                   1280:         * Only open the scope once the first non-leading-punctuation is
                   1281:         * found (unless MDOC_IGNDELIM is noted, like in `Pf'), then
                   1282:         * keep it open until the maximum number of arguments are
                   1283:         * exhausted.
                   1284:         */
1.1       kristaps 1285:
                   1286:        switch (tok) {
                   1287:        case (MDOC_Ap):
                   1288:                /* FALLTHROUGH */
                   1289:        case (MDOC_No):
                   1290:                /* FALLTHROUGH */
                   1291:        case (MDOC_Ns):
                   1292:                /* FALLTHROUGH */
                   1293:        case (MDOC_Ux):
                   1294:                maxargs = 0;
                   1295:                break;
1.42      kristaps 1296:        case (MDOC_Xr):
                   1297:                maxargs = 2;
                   1298:                break;
1.1       kristaps 1299:        default:
                   1300:                maxargs = 1;
                   1301:                break;
                   1302:        }
                   1303:
1.46      kristaps 1304:        for (arg = NULL; ; ) {
1.32      kristaps 1305:                la = *pos;
1.56      kristaps 1306:                av = mdoc_argv(m, line, tok, &arg, pos, buf);
1.1       kristaps 1307:
1.56      kristaps 1308:                if (ARGV_WORD == av) {
1.32      kristaps 1309:                        *pos = la;
1.1       kristaps 1310:                        break;
                   1311:                }
                   1312:
1.56      kristaps 1313:                if (ARGV_EOLN == av)
1.1       kristaps 1314:                        break;
1.56      kristaps 1315:                if (ARGV_ARG == av)
1.1       kristaps 1316:                        continue;
                   1317:
                   1318:                mdoc_argv_free(arg);
                   1319:                return(0);
                   1320:        }
                   1321:
1.46      kristaps 1322:        for (flushed = j = 0; ; ) {
1.32      kristaps 1323:                la = *pos;
1.53      kristaps 1324:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps 1325:
1.53      kristaps 1326:                if (ARGS_ERROR == ac)
1.1       kristaps 1327:                        return(0);
1.53      kristaps 1328:                if (ARGS_PUNCT == ac)
1.1       kristaps 1329:                        break;
1.53      kristaps 1330:                if (ARGS_EOLN == ac)
1.1       kristaps 1331:                        break;
                   1332:
1.46      kristaps 1333:                if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) &&
1.53      kristaps 1334:                                ARGS_QWORD != ac &&
1.46      kristaps 1335:                                0 == j && 1 == mdoc_isdelim(p)) {
                   1336:                        if ( ! mdoc_word_alloc(m, line, la, p))
                   1337:                                return(0);
                   1338:                        continue;
                   1339:                } else if (0 == j)
                   1340:                       if ( ! mdoc_elem_alloc(m, line, la, tok, arg))
                   1341:                               return(0);
                   1342:
                   1343:                if (j == maxargs && ! flushed) {
                   1344:                        if ( ! rew_elem(m, tok))
                   1345:                                return(0);
                   1346:                        flushed = 1;
                   1347:                }
                   1348:
1.54      kristaps 1349:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
                   1350:
                   1351:                if (MDOC_MAX != ntok) {
1.32      kristaps 1352:                        if ( ! flushed && ! rew_elem(m, tok))
1.1       kristaps 1353:                                return(0);
                   1354:                        flushed = 1;
1.53      kristaps 1355:                        if ( ! mdoc_macro(m, ntok, line, la, pos, buf))
1.1       kristaps 1356:                                return(0);
1.46      kristaps 1357:                        j++;
1.1       kristaps 1358:                        break;
                   1359:                }
                   1360:
                   1361:                if ( ! (MDOC_IGNDELIM & mdoc_macros[tok].flags) &&
1.53      kristaps 1362:                                ARGS_QWORD != ac &&
1.1       kristaps 1363:                                ! flushed && mdoc_isdelim(p)) {
1.32      kristaps 1364:                        if ( ! rew_elem(m, tok))
1.1       kristaps 1365:                                return(0);
                   1366:                        flushed = 1;
                   1367:                }
1.42      kristaps 1368:
                   1369:                /*
                   1370:                 * XXX: this is a hack to work around groff's ugliness
                   1371:                 * as regards `Xr' and extraneous arguments.  It should
                   1372:                 * ideally be deprecated behaviour, but because this is
                   1373:                 * code is no here, it's unlikely to be removed.
                   1374:                 */
1.43      kristaps 1375:
1.46      kristaps 1376: #ifdef __OpenBSD__
1.42      kristaps 1377:                if (MDOC_Xr == tok && j == maxargs) {
1.46      kristaps 1378:                        if ( ! mdoc_elem_alloc(m, line, la, MDOC_Ns, NULL))
1.42      kristaps 1379:                                return(0);
                   1380:                        if ( ! rew_elem(m, MDOC_Ns))
                   1381:                                return(0);
                   1382:                }
1.46      kristaps 1383: #endif
1.42      kristaps 1384:
1.32      kristaps 1385:                if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps 1386:                        return(0);
1.46      kristaps 1387:                j++;
1.1       kristaps 1388:        }
                   1389:
1.46      kristaps 1390:        if (0 == j && ! mdoc_elem_alloc(m, line, la, tok, arg))
                   1391:               return(0);
                   1392:
                   1393:        /* Close out in a consistent state. */
1.32      kristaps 1394:
                   1395:        if ( ! flushed && ! rew_elem(m, tok))
1.1       kristaps 1396:                return(0);
                   1397:
                   1398:        if (ppos > 1)
                   1399:                return(1);
1.32      kristaps 1400:        return(append_delims(m, line, pos, buf));
1.1       kristaps 1401: }
                   1402:
                   1403:
                   1404: static int
                   1405: in_line_eoln(MACRO_PROT_ARGS)
                   1406: {
1.56      kristaps 1407:        int              la;
1.55      kristaps 1408:        enum margserr    ac;
1.56      kristaps 1409:        enum margverr    av;
1.53      kristaps 1410:        struct mdoc_arg *arg;
                   1411:        char            *p;
                   1412:        enum mdoct       ntok;
1.1       kristaps 1413:
                   1414:        assert( ! (MDOC_PARSED & mdoc_macros[tok].flags));
                   1415:
1.32      kristaps 1416:        /* Parse macro arguments. */
1.1       kristaps 1417:
1.32      kristaps 1418:        for (arg = NULL; ; ) {
1.1       kristaps 1419:                la = *pos;
1.56      kristaps 1420:                av = mdoc_argv(m, line, tok, &arg, pos, buf);
1.1       kristaps 1421:
1.56      kristaps 1422:                if (ARGV_WORD == av) {
1.1       kristaps 1423:                        *pos = la;
                   1424:                        break;
                   1425:                }
1.56      kristaps 1426:                if (ARGV_EOLN == av)
1.1       kristaps 1427:                        break;
1.56      kristaps 1428:                if (ARGV_ARG == av)
1.1       kristaps 1429:                        continue;
                   1430:
                   1431:                mdoc_argv_free(arg);
                   1432:                return(0);
                   1433:        }
                   1434:
1.32      kristaps 1435:        /* Open element scope. */
                   1436:
                   1437:        if ( ! mdoc_elem_alloc(m, line, ppos, tok, arg))
1.1       kristaps 1438:                return(0);
                   1439:
1.32      kristaps 1440:        /* Parse argument terms. */
1.1       kristaps 1441:
                   1442:        for (;;) {
                   1443:                la = *pos;
1.53      kristaps 1444:                ac = mdoc_args(m, line, pos, buf, tok, &p);
1.1       kristaps 1445:
1.53      kristaps 1446:                if (ARGS_ERROR == ac)
1.1       kristaps 1447:                        return(0);
1.53      kristaps 1448:                if (ARGS_EOLN == ac)
1.1       kristaps 1449:                        break;
                   1450:
1.53      kristaps 1451:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup(tok, p);
1.1       kristaps 1452:
1.53      kristaps 1453:                if (MDOC_MAX == ntok) {
                   1454:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps 1455:                                return(0);
1.53      kristaps 1456:                        continue;
                   1457:                }
1.1       kristaps 1458:
1.53      kristaps 1459:                if ( ! rew_elem(m, tok))
1.1       kristaps 1460:                        return(0);
1.53      kristaps 1461:                return(mdoc_macro(m, ntok, line, la, pos, buf));
1.1       kristaps 1462:        }
                   1463:
1.32      kristaps 1464:        /* Close out (no delimiters). */
                   1465:
                   1466:        return(rew_elem(m, tok));
1.1       kristaps 1467: }
                   1468:
                   1469:
                   1470: /* ARGSUSED */
                   1471: static int
1.41      kristaps 1472: ctx_synopsis(MACRO_PROT_ARGS)
                   1473: {
                   1474:
                   1475:        /* If we're not in the SYNOPSIS, go straight to in-line. */
                   1476:        if (SEC_SYNOPSIS != m->lastsec)
                   1477:                return(in_line(m, tok, line, ppos, pos, buf));
                   1478:
                   1479:        /* If we're a nested call, same place. */
                   1480:        if (ppos > 1)
                   1481:                return(in_line(m, tok, line, ppos, pos, buf));
                   1482:
                   1483:        /*
                   1484:         * XXX: this will open a block scope; however, if later we end
                   1485:         * up formatting the block scope, then child nodes will inherit
                   1486:         * the formatting.  Be careful.
                   1487:         */
                   1488:
                   1489:        return(blk_part_imp(m, tok, line, ppos, pos, buf));
                   1490: }
                   1491:
                   1492:
                   1493: /* ARGSUSED */
                   1494: static int
1.1       kristaps 1495: obsolete(MACRO_PROT_ARGS)
                   1496: {
                   1497:
1.32      kristaps 1498:        return(mdoc_pwarn(m, line, ppos, EOBS));
1.1       kristaps 1499: }
                   1500:
                   1501:
1.24      kristaps 1502: /*
                   1503:  * Phrases occur within `Bl -column' entries, separated by `Ta' or tabs.
                   1504:  * They're unusual because they're basically free-form text until a
                   1505:  * macro is encountered.
                   1506:  */
1.1       kristaps 1507: static int
1.32      kristaps 1508: phrase(struct mdoc *m, int line, int ppos, char *buf)
1.1       kristaps 1509: {
1.53      kristaps 1510:        int              la, pos;
1.55      kristaps 1511:        enum margserr    ac;
1.53      kristaps 1512:        enum mdoct       ntok;
                   1513:        char            *p;
1.1       kristaps 1514:
1.24      kristaps 1515:        for (pos = ppos; ; ) {
                   1516:                la = pos;
1.1       kristaps 1517:
1.24      kristaps 1518:                /* Note: no calling context! */
1.53      kristaps 1519:                ac = mdoc_zargs(m, line, &pos, buf, 0, &p);
1.1       kristaps 1520:
1.53      kristaps 1521:                if (ARGS_ERROR == ac)
1.24      kristaps 1522:                        return(0);
1.53      kristaps 1523:                if (ARGS_EOLN == ac)
1.24      kristaps 1524:                        break;
1.1       kristaps 1525:
1.53      kristaps 1526:                ntok = ARGS_QWORD == ac ? MDOC_MAX : lookup_raw(p);
1.1       kristaps 1527:
1.53      kristaps 1528:                if (MDOC_MAX == ntok) {
                   1529:                        if ( ! mdoc_word_alloc(m, line, la, p))
1.1       kristaps 1530:                                return(0);
1.53      kristaps 1531:                        continue;
                   1532:                }
1.1       kristaps 1533:
1.53      kristaps 1534:                if ( ! mdoc_macro(m, ntok, line, la, &pos, buf))
1.1       kristaps 1535:                        return(0);
1.53      kristaps 1536:                return(append_delims(m, line, &pos, buf));
1.1       kristaps 1537:        }
                   1538:
                   1539:        return(1);
                   1540: }
1.24      kristaps 1541:
                   1542:

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