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Annotation of mandoc/mdoc.c, Revision 1.77

1.77    ! kristaps    1: /*     $Id: mdoc.c,v 1.76 2009/06/10 20:18:43 kristaps Exp $ */
1.1       kristaps    2: /*
1.76      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
1.75      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:  *
1.75      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:  */
                     17: #include <assert.h>
                     18: #include <ctype.h>
                     19: #include <stdarg.h>
1.73      kristaps   20: #include <stdio.h>
1.1       kristaps   21: #include <stdlib.h>
                     22: #include <string.h>
                     23:
1.70      kristaps   24: #include "libmdoc.h"
1.1       kristaps   25:
1.73      kristaps   26: enum   merr {
                     27:        ENOCALL,
                     28:        EBODYPROL,
                     29:        EPROLBODY,
                     30:        ESPACE,
                     31:        ETEXTPROL,
                     32:        ENOBLANK,
                     33:        EMALLOC
                     34: };
1.41      kristaps   35:
1.1       kristaps   36: const  char *const __mdoc_macronames[MDOC_MAX] = {
                     37:        "\\\"",         "Dd",           "Dt",           "Os",
                     38:        "Sh",           "Ss",           "Pp",           "D1",
                     39:        "Dl",           "Bd",           "Ed",           "Bl",
                     40:        "El",           "It",           "Ad",           "An",
                     41:        "Ar",           "Cd",           "Cm",           "Dv",
                     42:        "Er",           "Ev",           "Ex",           "Fa",
                     43:        "Fd",           "Fl",           "Fn",           "Ft",
                     44:        "Ic",           "In",           "Li",           "Nd",
                     45:        "Nm",           "Op",           "Ot",           "Pa",
                     46:        "Rv",           "St",           "Va",           "Vt",
                     47:        /* LINTED */
                     48:        "Xr",           "\%A",          "\%B",          "\%D",
                     49:        /* LINTED */
                     50:        "\%I",          "\%J",          "\%N",          "\%O",
                     51:        /* LINTED */
                     52:        "\%P",          "\%R",          "\%T",          "\%V",
                     53:        "Ac",           "Ao",           "Aq",           "At",
                     54:        "Bc",           "Bf",           "Bo",           "Bq",
                     55:        "Bsx",          "Bx",           "Db",           "Dc",
                     56:        "Do",           "Dq",           "Ec",           "Ef",
                     57:        "Em",           "Eo",           "Fx",           "Ms",
                     58:        "No",           "Ns",           "Nx",           "Ox",
                     59:        "Pc",           "Pf",           "Po",           "Pq",
                     60:        "Qc",           "Ql",           "Qo",           "Qq",
                     61:        "Re",           "Rs",           "Sc",           "So",
                     62:        "Sq",           "Sm",           "Sx",           "Sy",
                     63:        "Tn",           "Ux",           "Xc",           "Xo",
                     64:        "Fo",           "Fc",           "Oo",           "Oc",
                     65:        "Bk",           "Ek",           "Bt",           "Hf",
1.57      kristaps   66:        "Fr",           "Ud",           "Lb",           "Ap",
1.61      kristaps   67:        "Lp",           "Lk",           "Mt",           "Brq",
1.64      kristaps   68:        /* LINTED */
1.65      kristaps   69:        "Bro",          "Brc",          "\%C",          "Es",
1.69      kristaps   70:        /* LINTED */
                     71:        "En",           "Dx",           "\%Q"
1.1       kristaps   72:        };
                     73:
                     74: const  char *const __mdoc_argnames[MDOC_ARG_MAX] = {
                     75:        "split",                "nosplit",              "ragged",
                     76:        "unfilled",             "literal",              "file",
                     77:        "offset",               "bullet",               "dash",
                     78:        "hyphen",               "item",                 "enum",
                     79:        "tag",                  "diag",                 "hang",
                     80:        "ohang",                "inset",                "column",
                     81:        "width",                "compact",              "std",
1.52      kristaps   82:        "filled",               "words",                "emphasis",
1.64      kristaps   83:        "symbolic",             "nested"
1.1       kristaps   84:        };
                     85:
                     86: const  char * const *mdoc_macronames = __mdoc_macronames;
                     87: const  char * const *mdoc_argnames = __mdoc_argnames;
                     88:
1.73      kristaps   89: static void              mdoc_free1(struct mdoc *);
                     90: static int               mdoc_alloc1(struct mdoc *);
                     91: static struct mdoc_node *node_alloc(struct mdoc *, int, int,
                     92:                                int, enum mdoc_type);
                     93: static int               node_append(struct mdoc *,
1.71      kristaps   94:                                struct mdoc_node *);
                     95: static int               parsetext(struct mdoc *, int, char *);
                     96: static int               parsemacro(struct mdoc *, int, char *);
                     97: static int               macrowarn(struct mdoc *, int, const char *);
1.73      kristaps   98: static int               perr(struct mdoc *, int, int, enum merr);
1.71      kristaps   99:
1.73      kristaps  100: #define verr(m, t) perr((m), (m)->last->line, (m)->last->pos, (t))
1.45      kristaps  101:
1.68      kristaps  102: /*
                    103:  * Get the first (root) node of the parse tree.
                    104:  */
1.1       kristaps  105: const struct mdoc_node *
1.71      kristaps  106: mdoc_node(const struct mdoc *m)
1.1       kristaps  107: {
                    108:
1.71      kristaps  109:        return(MDOC_HALT & m->flags ? NULL : m->first);
1.1       kristaps  110: }
                    111:
                    112:
1.37      kristaps  113: const struct mdoc_meta *
1.71      kristaps  114: mdoc_meta(const struct mdoc *m)
1.37      kristaps  115: {
                    116:
1.71      kristaps  117:        return(MDOC_HALT & m->flags ? NULL : &m->meta);
1.37      kristaps  118: }
                    119:
                    120:
1.73      kristaps  121: static void
                    122: mdoc_free1(struct mdoc *mdoc)
1.67      kristaps  123: {
                    124:
                    125:        if (mdoc->first)
                    126:                mdoc_node_freelist(mdoc->first);
                    127:        if (mdoc->meta.title)
                    128:                free(mdoc->meta.title);
                    129:        if (mdoc->meta.os)
                    130:                free(mdoc->meta.os);
                    131:        if (mdoc->meta.name)
                    132:                free(mdoc->meta.name);
                    133:        if (mdoc->meta.arch)
                    134:                free(mdoc->meta.arch);
                    135:        if (mdoc->meta.vol)
                    136:                free(mdoc->meta.vol);
1.73      kristaps  137: }
                    138:
                    139:
                    140: static int
                    141: mdoc_alloc1(struct mdoc *mdoc)
                    142: {
1.67      kristaps  143:
                    144:        bzero(&mdoc->meta, sizeof(struct mdoc_meta));
                    145:        mdoc->flags = 0;
                    146:        mdoc->lastnamed = mdoc->lastsec = 0;
1.70      kristaps  147:        mdoc->last = calloc(1, sizeof(struct mdoc_node));
                    148:        if (NULL == mdoc->last)
1.73      kristaps  149:                return(0);
                    150:
1.70      kristaps  151:        mdoc->first = mdoc->last;
1.67      kristaps  152:        mdoc->last->type = MDOC_ROOT;
                    153:        mdoc->next = MDOC_NEXT_CHILD;
1.73      kristaps  154:        return(1);
                    155: }
                    156:
                    157:
                    158: /*
                    159:  * Free up all resources contributed by a parse:  the node tree,
                    160:  * meta-data and so on.  Then reallocate the root node for another
                    161:  * parse.
                    162:  */
                    163: int
                    164: mdoc_reset(struct mdoc *mdoc)
                    165: {
                    166:
                    167:        mdoc_free1(mdoc);
                    168:        return(mdoc_alloc1(mdoc));
1.67      kristaps  169: }
                    170:
                    171:
1.68      kristaps  172: /*
                    173:  * Completely free up all resources.
                    174:  */
1.67      kristaps  175: void
1.38      kristaps  176: mdoc_free(struct mdoc *mdoc)
1.34      kristaps  177: {
                    178:
1.73      kristaps  179:        mdoc_free1(mdoc);
1.68      kristaps  180:        if (mdoc->htab)
1.74      kristaps  181:                mdoc_hash_free(mdoc->htab);
1.1       kristaps  182:        free(mdoc);
                    183: }
                    184:
                    185:
                    186: struct mdoc *
1.55      kristaps  187: mdoc_alloc(void *data, int pflags, const struct mdoc_cb *cb)
1.1       kristaps  188: {
                    189:        struct mdoc     *p;
                    190:
1.70      kristaps  191:        if (NULL == (p = calloc(1, sizeof(struct mdoc))))
1.73      kristaps  192:                return(NULL);
1.74      kristaps  193:        if (cb)
                    194:                (void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
1.1       kristaps  195:
                    196:        p->data = data;
1.73      kristaps  197:        p->pflags = pflags;
                    198:
1.74      kristaps  199:        if (NULL == (p->htab = mdoc_hash_alloc())) {
                    200:                free(p);
                    201:                return(NULL);
                    202:        } else if (mdoc_alloc1(p))
                    203:                return(p);
1.1       kristaps  204:
1.73      kristaps  205:        free(p);
                    206:        return(NULL);
1.1       kristaps  207: }
                    208:
                    209:
1.68      kristaps  210: /*
                    211:  * Climb back up the parse tree, validating open scopes.  Mostly calls
                    212:  * through to macro_end in macro.c.
                    213:  */
1.1       kristaps  214: int
1.72      kristaps  215: mdoc_endparse(struct mdoc *m)
1.20      kristaps  216: {
                    217:
1.72      kristaps  218:        if (MDOC_HALT & m->flags)
1.20      kristaps  219:                return(0);
1.72      kristaps  220:        else if (mdoc_macroend(m))
1.20      kristaps  221:                return(1);
1.72      kristaps  222:        m->flags |= MDOC_HALT;
                    223:        return(0);
1.20      kristaps  224: }
                    225:
                    226:
1.50      kristaps  227: /*
1.53      kristaps  228:  * Main parse routine.  Parses a single line -- really just hands off to
                    229:  * the macro or text parser.
1.50      kristaps  230:  */
1.20      kristaps  231: int
1.53      kristaps  232: mdoc_parseln(struct mdoc *m, int ln, char *buf)
1.1       kristaps  233: {
                    234:
1.53      kristaps  235:        /* If in error-mode, then we parse no more. */
1.50      kristaps  236:
1.53      kristaps  237:        if (MDOC_HALT & m->flags)
1.20      kristaps  238:                return(0);
1.50      kristaps  239:
1.53      kristaps  240:        return('.' == *buf ? parsemacro(m, ln, buf) :
                    241:                        parsetext(m, ln, buf));
1.1       kristaps  242: }
                    243:
                    244:
                    245: void
1.31      kristaps  246: mdoc_vmsg(struct mdoc *mdoc, int ln, int pos, const char *fmt, ...)
1.1       kristaps  247: {
1.31      kristaps  248:        char              buf[256];
1.23      kristaps  249:        va_list           ap;
1.1       kristaps  250:
                    251:        if (NULL == mdoc->cb.mdoc_msg)
                    252:                return;
                    253:
                    254:        va_start(ap, fmt);
1.31      kristaps  255:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1.1       kristaps  256:        va_end(ap);
1.31      kristaps  257:        (*mdoc->cb.mdoc_msg)(mdoc->data, ln, pos, buf);
1.1       kristaps  258: }
                    259:
                    260:
                    261: int
1.31      kristaps  262: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
                    263:                const char *fmt, ...)
1.1       kristaps  264: {
1.31      kristaps  265:        char             buf[256];
                    266:        va_list          ap;
1.1       kristaps  267:
                    268:        if (NULL == mdoc->cb.mdoc_err)
                    269:                return(0);
1.31      kristaps  270:
                    271:        va_start(ap, fmt);
                    272:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    273:        va_end(ap);
                    274:        return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
1.1       kristaps  275: }
                    276:
                    277:
                    278: int
1.31      kristaps  279: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos,
                    280:                enum mdoc_warn type, const char *fmt, ...)
1.1       kristaps  281: {
1.31      kristaps  282:        char             buf[256];
                    283:        va_list          ap;
1.1       kristaps  284:
                    285:        if (NULL == mdoc->cb.mdoc_warn)
                    286:                return(0);
1.31      kristaps  287:
                    288:        va_start(ap, fmt);
                    289:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    290:        va_end(ap);
                    291:        return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, type, buf));
1.1       kristaps  292: }
                    293:
                    294:
                    295: int
1.53      kristaps  296: mdoc_macro(struct mdoc *m, int tok,
                    297:                int ln, int pp, int *pos, char *buf)
1.1       kristaps  298: {
                    299:
1.53      kristaps  300:        /* FIXME - these should happen during validation. */
1.31      kristaps  301:
1.44      kristaps  302:        if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
1.53      kristaps  303:                        SEC_PROLOGUE != m->lastnamed)
1.73      kristaps  304:                return(perr(m, ln, pp, EPROLBODY));
1.53      kristaps  305:
1.44      kristaps  306:        if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
1.53      kristaps  307:                        SEC_PROLOGUE == m->lastnamed)
1.73      kristaps  308:                return(perr(m, ln, pp, EBODYPROL));
1.53      kristaps  309:
                    310:        if (1 != pp && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
1.73      kristaps  311:                return(perr(m, ln, pp, ENOCALL));
1.53      kristaps  312:
                    313:        return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
1.1       kristaps  314: }
                    315:
                    316:
1.23      kristaps  317: static int
1.73      kristaps  318: perr(struct mdoc *m, int line, int pos, enum merr type)
                    319: {
                    320:        char            *p;
                    321:
                    322:        p = NULL;
                    323:        switch (type) {
                    324:        case (ENOCALL):
                    325:                p = "not callable";
                    326:                break;
                    327:        case (EPROLBODY):
                    328:                p = "macro disallowed in document body";
                    329:                break;
                    330:        case (EBODYPROL):
                    331:                p = "macro disallowed in document prologue";
                    332:                break;
                    333:        case (EMALLOC):
                    334:                p = "memory exhausted";
                    335:                break;
                    336:        case (ETEXTPROL):
                    337:                p = "text disallowed in document prologue";
                    338:                break;
                    339:        case (ENOBLANK):
                    340:                p = "blank lines disallowed in non-literal contexts";
                    341:                break;
                    342:        case (ESPACE):
                    343:                p = "whitespace disallowed after delimiter";
                    344:                break;
                    345:        }
                    346:        assert(p);
                    347:        return(mdoc_perr(m, line, pos, p));
                    348: }
                    349:
                    350:
                    351: static int
                    352: node_append(struct mdoc *mdoc, struct mdoc_node *p)
1.1       kristaps  353: {
                    354:
1.25      kristaps  355:        assert(mdoc->last);
                    356:        assert(mdoc->first);
                    357:        assert(MDOC_ROOT != p->type);
1.1       kristaps  358:
1.13      kristaps  359:        switch (mdoc->next) {
                    360:        case (MDOC_NEXT_SIBLING):
1.6       kristaps  361:                mdoc->last->next = p;
                    362:                p->prev = mdoc->last;
1.13      kristaps  363:                p->parent = mdoc->last->parent;
1.1       kristaps  364:                break;
1.13      kristaps  365:        case (MDOC_NEXT_CHILD):
                    366:                mdoc->last->child = p;
1.1       kristaps  367:                p->parent = mdoc->last;
                    368:                break;
                    369:        default:
1.13      kristaps  370:                abort();
                    371:                /* NOTREACHED */
1.1       kristaps  372:        }
                    373:
1.23      kristaps  374:        if ( ! mdoc_valid_pre(mdoc, p))
                    375:                return(0);
1.68      kristaps  376:        if ( ! mdoc_action_pre(mdoc, p))
                    377:                return(0);
1.27      kristaps  378:
                    379:        switch (p->type) {
                    380:        case (MDOC_HEAD):
                    381:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  382:                p->parent->head = p;
1.27      kristaps  383:                break;
                    384:        case (MDOC_TAIL):
                    385:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  386:                p->parent->tail = p;
1.27      kristaps  387:                break;
                    388:        case (MDOC_BODY):
                    389:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  390:                p->parent->body = p;
1.27      kristaps  391:                break;
                    392:        default:
                    393:                break;
                    394:        }
                    395:
1.1       kristaps  396:        mdoc->last = p;
1.71      kristaps  397:
                    398:        switch (p->type) {
                    399:        case (MDOC_TEXT):
                    400:                if ( ! mdoc_valid_post(mdoc))
                    401:                        return(0);
                    402:                if ( ! mdoc_action_post(mdoc))
                    403:                        return(0);
                    404:                break;
                    405:        default:
                    406:                break;
                    407:        }
                    408:
1.23      kristaps  409:        return(1);
1.1       kristaps  410: }
                    411:
                    412:
1.45      kristaps  413: static struct mdoc_node *
1.73      kristaps  414: node_alloc(struct mdoc *mdoc, int line,
                    415:                int pos, int tok, enum mdoc_type type)
1.45      kristaps  416: {
1.46      kristaps  417:        struct mdoc_node *p;
                    418:
1.73      kristaps  419:        if (NULL == (p = calloc(1, sizeof(struct mdoc_node)))) {
                    420:                (void)verr(mdoc, EMALLOC);
                    421:                return(NULL);
                    422:        }
                    423:
1.46      kristaps  424:        p->sec = mdoc->lastsec;
1.73      kristaps  425:        p->line = line;
                    426:        p->pos = pos;
                    427:        p->tok = tok;
                    428:        if (MDOC_TEXT != (p->type = type))
                    429:                assert(p->tok >= 0);
1.45      kristaps  430:
1.46      kristaps  431:        return(p);
1.45      kristaps  432: }
                    433:
                    434:
1.23      kristaps  435: int
1.22      kristaps  436: mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.17      kristaps  437: {
                    438:        struct mdoc_node *p;
                    439:
1.73      kristaps  440:        p = node_alloc(mdoc, line, pos, tok, MDOC_TAIL);
                    441:        if (NULL == p)
                    442:                return(0);
                    443:        return(node_append(mdoc, p));
1.17      kristaps  444: }
                    445:
                    446:
1.23      kristaps  447: int
1.22      kristaps  448: mdoc_head_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  449: {
                    450:        struct mdoc_node *p;
                    451:
                    452:        assert(mdoc->first);
                    453:        assert(mdoc->last);
                    454:
1.73      kristaps  455:        p = node_alloc(mdoc, line, pos, tok, MDOC_HEAD);
                    456:        if (NULL == p)
                    457:                return(0);
                    458:        return(node_append(mdoc, p));
1.1       kristaps  459: }
                    460:
                    461:
1.23      kristaps  462: int
1.22      kristaps  463: mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  464: {
                    465:        struct mdoc_node *p;
                    466:
1.73      kristaps  467:        p = node_alloc(mdoc, line, pos, tok, MDOC_BODY);
                    468:        if (NULL == p)
                    469:                return(0);
                    470:        return(node_append(mdoc, p));
1.1       kristaps  471: }
                    472:
                    473:
1.23      kristaps  474: int
1.22      kristaps  475: mdoc_block_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  476:                int tok, struct mdoc_arg *args)
1.1       kristaps  477: {
                    478:        struct mdoc_node *p;
                    479:
1.73      kristaps  480:        p = node_alloc(mdoc, line, pos, tok, MDOC_BLOCK);
                    481:        if (NULL == p)
                    482:                return(0);
1.77    ! kristaps  483:        p->args = args;
        !           484:        if (p->args)
1.53      kristaps  485:                (args->refcnt)++;
1.73      kristaps  486:        return(node_append(mdoc, p));
1.1       kristaps  487: }
                    488:
                    489:
1.23      kristaps  490: int
1.22      kristaps  491: mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  492:                int tok, struct mdoc_arg *args)
1.1       kristaps  493: {
                    494:        struct mdoc_node *p;
                    495:
1.73      kristaps  496:        p = node_alloc(mdoc, line, pos, tok, MDOC_ELEM);
                    497:        if (NULL == p)
                    498:                return(0);
1.77    ! kristaps  499:        p->args = args;
        !           500:        if (p->args)
1.53      kristaps  501:                (args->refcnt)++;
1.73      kristaps  502:        return(node_append(mdoc, p));
1.1       kristaps  503: }
                    504:
                    505:
1.23      kristaps  506: int
1.22      kristaps  507: mdoc_word_alloc(struct mdoc *mdoc,
                    508:                int line, int pos, const char *word)
1.1       kristaps  509: {
                    510:        struct mdoc_node *p;
                    511:
1.73      kristaps  512:        p = node_alloc(mdoc, line, pos, -1, MDOC_TEXT);
                    513:        if (NULL == p)
                    514:                return(0);
                    515:        if (NULL == (p->string = strdup(word))) {
                    516:                (void)verr(mdoc, EMALLOC);
                    517:                return(0);
                    518:        }
                    519:        return(node_append(mdoc, p));
1.1       kristaps  520: }
                    521:
                    522:
1.53      kristaps  523: void
                    524: mdoc_node_free(struct mdoc_node *p)
1.1       kristaps  525: {
                    526:
1.53      kristaps  527:        if (p->string)
                    528:                free(p->string);
                    529:        if (p->args)
                    530:                mdoc_argv_free(p->args);
1.1       kristaps  531:        free(p);
                    532: }
                    533:
                    534:
1.53      kristaps  535: void
                    536: mdoc_node_freelist(struct mdoc_node *p)
1.1       kristaps  537: {
                    538:
1.53      kristaps  539:        if (p->child)
                    540:                mdoc_node_freelist(p->child);
                    541:        if (p->next)
                    542:                mdoc_node_freelist(p->next);
1.1       kristaps  543:
1.53      kristaps  544:        mdoc_node_free(p);
1.1       kristaps  545: }
                    546:
                    547:
1.53      kristaps  548: /*
                    549:  * Parse free-form text, that is, a line that does not begin with the
                    550:  * control character.
                    551:  */
                    552: static int
1.68      kristaps  553: parsetext(struct mdoc *m, int line, char *buf)
1.1       kristaps  554: {
                    555:
1.68      kristaps  556:        if (SEC_PROLOGUE == m->lastnamed)
1.73      kristaps  557:                return(perr(m, line, 0, ETEXTPROL));
1.1       kristaps  558:
1.68      kristaps  559:        if (0 == buf[0] && ! (MDOC_LITERAL & m->flags))
1.73      kristaps  560:                return(perr(m, line, 0, ENOBLANK));
1.68      kristaps  561:
                    562:        if ( ! mdoc_word_alloc(m, line, 0, buf))
1.53      kristaps  563:                return(0);
1.1       kristaps  564:
1.68      kristaps  565:        m->next = MDOC_NEXT_SIBLING;
1.53      kristaps  566:        return(1);
1.1       kristaps  567: }
                    568:
                    569:
1.58      kristaps  570: static int
                    571: macrowarn(struct mdoc *m, int ln, const char *buf)
                    572: {
                    573:        if ( ! (MDOC_IGN_MACRO & m->pflags))
1.73      kristaps  574:                return(mdoc_perr(m, ln, 1,
                    575:                                "unknown macro: %s%s",
1.59      kristaps  576:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  577:        return(mdoc_pwarn(m, ln, 1, WARN_SYNTAX,
                    578:                                "unknown macro: %s%s",
1.59      kristaps  579:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  580: }
                    581:
                    582:
                    583:
1.53      kristaps  584: /*
                    585:  * Parse a macro line, that is, a line beginning with the control
                    586:  * character.
                    587:  */
                    588: int
                    589: parsemacro(struct mdoc *m, int ln, char *buf)
1.1       kristaps  590: {
1.53      kristaps  591:        int               i, c;
                    592:        char              mac[5];
1.1       kristaps  593:
1.63      kristaps  594:        /* Comments and empties are quickly ignored. */
                    595:
                    596:        if (0 == buf[1])
                    597:                return(1);
                    598:
1.65      kristaps  599:        if (' ' == buf[1]) {
1.63      kristaps  600:                i = 2;
1.65      kristaps  601:                while (buf[i] && ' ' == buf[i])
1.63      kristaps  602:                        i++;
                    603:                if (0 == buf[i])
                    604:                        return(1);
1.73      kristaps  605:                return(perr(m, ln, 1, ESPACE));
1.63      kristaps  606:        }
1.1       kristaps  607:
1.53      kristaps  608:        if (buf[1] && '\\' == buf[1])
                    609:                if (buf[2] && '\"' == buf[2])
                    610:                        return(1);
1.1       kristaps  611:
1.53      kristaps  612:        /* Copy the first word into a nil-terminated buffer. */
1.1       kristaps  613:
1.53      kristaps  614:        for (i = 1; i < 5; i++) {
                    615:                if (0 == (mac[i - 1] = buf[i]))
                    616:                        break;
1.65      kristaps  617:                else if (' ' == buf[i])
1.53      kristaps  618:                        break;
                    619:        }
1.1       kristaps  620:
1.53      kristaps  621:        mac[i - 1] = 0;
1.1       kristaps  622:
1.53      kristaps  623:        if (i == 5 || i <= 2) {
1.58      kristaps  624:                if ( ! macrowarn(m, ln, mac))
                    625:                        goto err;
                    626:                return(1);
1.53      kristaps  627:        }
                    628:
1.74      kristaps  629:        if (MDOC_MAX == (c = mdoc_hash_find(m->htab, mac))) {
1.58      kristaps  630:                if ( ! macrowarn(m, ln, mac))
                    631:                        goto err;
                    632:                return(1);
1.53      kristaps  633:        }
1.1       kristaps  634:
1.53      kristaps  635:        /* The macro is sane.  Jump to the next word. */
1.1       kristaps  636:
1.65      kristaps  637:        while (buf[i] && ' ' == buf[i])
1.53      kristaps  638:                i++;
1.1       kristaps  639:
1.53      kristaps  640:        /* Begin recursive parse sequence. */
1.1       kristaps  641:
1.53      kristaps  642:        if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
                    643:                goto err;
1.1       kristaps  644:
1.53      kristaps  645:        return(1);
1.1       kristaps  646:
1.53      kristaps  647: err:   /* Error out. */
1.1       kristaps  648:
1.53      kristaps  649:        m->flags |= MDOC_HALT;
                    650:        return(0);
1.1       kristaps  651: }

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