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Annotation of mandoc/mdoc.c, Revision 1.83

1.83    ! kristaps    1: /*     $Id: mdoc.c,v 1.82 2009/06/16 19:45:51 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] = {
1.82      kristaps   37:        "Ap",           "Dd",           "Dt",           "Os",
1.1       kristaps   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",
1.82      kristaps   66:        "Fr",           "Ud",           "Lb",           "Lp",
                     67:        "Lk",           "Mt",           "Brq",          "Bro",
1.64      kristaps   68:        /* LINTED */
1.82      kristaps   69:        "Brc",          "\%C",          "Es",           "En",
1.69      kristaps   70:        /* LINTED */
1.82      kristaps   71:        "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:
1.1       kristaps  102: const struct mdoc_node *
1.71      kristaps  103: mdoc_node(const struct mdoc *m)
1.1       kristaps  104: {
                    105:
1.71      kristaps  106:        return(MDOC_HALT & m->flags ? NULL : m->first);
1.1       kristaps  107: }
                    108:
                    109:
1.37      kristaps  110: const struct mdoc_meta *
1.71      kristaps  111: mdoc_meta(const struct mdoc *m)
1.37      kristaps  112: {
                    113:
1.71      kristaps  114:        return(MDOC_HALT & m->flags ? NULL : &m->meta);
1.37      kristaps  115: }
                    116:
                    117:
1.73      kristaps  118: static void
                    119: mdoc_free1(struct mdoc *mdoc)
1.67      kristaps  120: {
                    121:
                    122:        if (mdoc->first)
                    123:                mdoc_node_freelist(mdoc->first);
                    124:        if (mdoc->meta.title)
                    125:                free(mdoc->meta.title);
                    126:        if (mdoc->meta.os)
                    127:                free(mdoc->meta.os);
                    128:        if (mdoc->meta.name)
                    129:                free(mdoc->meta.name);
                    130:        if (mdoc->meta.arch)
                    131:                free(mdoc->meta.arch);
                    132:        if (mdoc->meta.vol)
                    133:                free(mdoc->meta.vol);
1.73      kristaps  134: }
                    135:
                    136:
                    137: static int
                    138: mdoc_alloc1(struct mdoc *mdoc)
                    139: {
1.67      kristaps  140:
                    141:        bzero(&mdoc->meta, sizeof(struct mdoc_meta));
                    142:        mdoc->flags = 0;
                    143:        mdoc->lastnamed = mdoc->lastsec = 0;
1.70      kristaps  144:        mdoc->last = calloc(1, sizeof(struct mdoc_node));
                    145:        if (NULL == mdoc->last)
1.73      kristaps  146:                return(0);
                    147:
1.70      kristaps  148:        mdoc->first = mdoc->last;
1.67      kristaps  149:        mdoc->last->type = MDOC_ROOT;
                    150:        mdoc->next = MDOC_NEXT_CHILD;
1.73      kristaps  151:        return(1);
                    152: }
                    153:
                    154:
                    155: /*
                    156:  * Free up all resources contributed by a parse:  the node tree,
                    157:  * meta-data and so on.  Then reallocate the root node for another
                    158:  * parse.
                    159:  */
                    160: int
                    161: mdoc_reset(struct mdoc *mdoc)
                    162: {
                    163:
                    164:        mdoc_free1(mdoc);
                    165:        return(mdoc_alloc1(mdoc));
1.67      kristaps  166: }
                    167:
                    168:
1.68      kristaps  169: /*
                    170:  * Completely free up all resources.
                    171:  */
1.67      kristaps  172: void
1.38      kristaps  173: mdoc_free(struct mdoc *mdoc)
1.34      kristaps  174: {
                    175:
1.73      kristaps  176:        mdoc_free1(mdoc);
1.68      kristaps  177:        if (mdoc->htab)
1.74      kristaps  178:                mdoc_hash_free(mdoc->htab);
1.1       kristaps  179:        free(mdoc);
                    180: }
                    181:
                    182:
                    183: struct mdoc *
1.55      kristaps  184: mdoc_alloc(void *data, int pflags, const struct mdoc_cb *cb)
1.1       kristaps  185: {
                    186:        struct mdoc     *p;
                    187:
1.70      kristaps  188:        if (NULL == (p = calloc(1, sizeof(struct mdoc))))
1.73      kristaps  189:                return(NULL);
1.74      kristaps  190:        if (cb)
                    191:                (void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
1.1       kristaps  192:
                    193:        p->data = data;
1.73      kristaps  194:        p->pflags = pflags;
                    195:
1.74      kristaps  196:        if (NULL == (p->htab = mdoc_hash_alloc())) {
                    197:                free(p);
                    198:                return(NULL);
                    199:        } else if (mdoc_alloc1(p))
                    200:                return(p);
1.1       kristaps  201:
1.73      kristaps  202:        free(p);
                    203:        return(NULL);
1.1       kristaps  204: }
                    205:
                    206:
1.68      kristaps  207: /*
                    208:  * Climb back up the parse tree, validating open scopes.  Mostly calls
                    209:  * through to macro_end in macro.c.
                    210:  */
1.1       kristaps  211: int
1.72      kristaps  212: mdoc_endparse(struct mdoc *m)
1.20      kristaps  213: {
                    214:
1.72      kristaps  215:        if (MDOC_HALT & m->flags)
1.20      kristaps  216:                return(0);
1.72      kristaps  217:        else if (mdoc_macroend(m))
1.20      kristaps  218:                return(1);
1.72      kristaps  219:        m->flags |= MDOC_HALT;
                    220:        return(0);
1.20      kristaps  221: }
                    222:
                    223:
1.50      kristaps  224: /*
1.53      kristaps  225:  * Main parse routine.  Parses a single line -- really just hands off to
                    226:  * the macro or text parser.
1.50      kristaps  227:  */
1.20      kristaps  228: int
1.53      kristaps  229: mdoc_parseln(struct mdoc *m, int ln, char *buf)
1.1       kristaps  230: {
                    231:
1.53      kristaps  232:        /* If in error-mode, then we parse no more. */
1.50      kristaps  233:
1.53      kristaps  234:        if (MDOC_HALT & m->flags)
1.20      kristaps  235:                return(0);
1.50      kristaps  236:
1.53      kristaps  237:        return('.' == *buf ? parsemacro(m, ln, buf) :
                    238:                        parsetext(m, ln, buf));
1.1       kristaps  239: }
                    240:
                    241:
                    242: int
1.31      kristaps  243: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
                    244:                const char *fmt, ...)
1.1       kristaps  245: {
1.31      kristaps  246:        char             buf[256];
                    247:        va_list          ap;
1.1       kristaps  248:
                    249:        if (NULL == mdoc->cb.mdoc_err)
                    250:                return(0);
1.31      kristaps  251:
                    252:        va_start(ap, fmt);
                    253:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    254:        va_end(ap);
                    255:        return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
1.1       kristaps  256: }
                    257:
                    258:
                    259: int
1.31      kristaps  260: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos,
                    261:                enum mdoc_warn type, const char *fmt, ...)
1.1       kristaps  262: {
1.31      kristaps  263:        char             buf[256];
                    264:        va_list          ap;
1.1       kristaps  265:
                    266:        if (NULL == mdoc->cb.mdoc_warn)
                    267:                return(0);
1.31      kristaps  268:
                    269:        va_start(ap, fmt);
                    270:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    271:        va_end(ap);
                    272:        return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, type, buf));
1.1       kristaps  273: }
                    274:
                    275:
                    276: int
1.78      kristaps  277: mdoc_nerr(struct mdoc *mdoc, const struct mdoc_node *node, const char *fmt, ...)
                    278: {
                    279:        char             buf[256];
                    280:        va_list          ap;
                    281:
                    282:        if (NULL == mdoc->cb.mdoc_err)
                    283:                return(0);
                    284:
                    285:        va_start(ap, fmt);
                    286:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    287:        va_end(ap);
                    288:        return((*mdoc->cb.mdoc_err)(mdoc->data, node->line, node->pos, buf));
                    289: }
                    290:
                    291:
                    292: int
                    293: mdoc_warn(struct mdoc *mdoc, enum mdoc_warn type, const char *fmt, ...)
                    294: {
                    295:        char             buf[256];
                    296:        va_list          ap;
                    297:
                    298:        if (NULL == mdoc->cb.mdoc_warn)
                    299:                return(0);
                    300:
                    301:        va_start(ap, fmt);
                    302:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    303:        va_end(ap);
                    304:        return((*mdoc->cb.mdoc_warn)(mdoc->data, mdoc->last->line,
                    305:            mdoc->last->pos, type, buf));
                    306: }
                    307:
                    308:
                    309: int
                    310: mdoc_err(struct mdoc *mdoc, const char *fmt, ...)
                    311: {
                    312:        char             buf[256];
                    313:        va_list          ap;
                    314:
                    315:        if (NULL == mdoc->cb.mdoc_err)
                    316:                return(0);
                    317:
                    318:        va_start(ap, fmt);
                    319:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    320:        va_end(ap);
                    321:        return((*mdoc->cb.mdoc_err)(mdoc->data, mdoc->last->line,
                    322:            mdoc->last->pos, buf));
                    323: }
                    324:
                    325:
                    326: int
                    327: mdoc_pwarn(struct mdoc *mdoc, int line, int pos, enum mdoc_warn type,
                    328:                const char *fmt, ...)
                    329: {
                    330:        char             buf[256];
                    331:        va_list          ap;
                    332:
                    333:        if (NULL == mdoc->cb.mdoc_warn)
                    334:                return(0);
                    335:
                    336:        va_start(ap, fmt);
                    337:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    338:        va_end(ap);
                    339:        return((*mdoc->cb.mdoc_warn)(mdoc->data, line, pos, type, buf));
                    340: }
                    341:
                    342: int
                    343: mdoc_perr(struct mdoc *mdoc, int line, int pos, const char *fmt, ...)
                    344: {
                    345:        char             buf[256];
                    346:        va_list          ap;
                    347:
                    348:        if (NULL == mdoc->cb.mdoc_err)
                    349:                return(0);
                    350:
                    351:        va_start(ap, fmt);
                    352:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    353:        va_end(ap);
                    354:        return((*mdoc->cb.mdoc_err)(mdoc->data, line, pos, buf));
                    355: }
                    356:
                    357:
                    358: int
1.53      kristaps  359: mdoc_macro(struct mdoc *m, int tok,
                    360:                int ln, int pp, int *pos, char *buf)
1.1       kristaps  361: {
                    362:
1.53      kristaps  363:        /* FIXME - these should happen during validation. */
1.31      kristaps  364:
1.44      kristaps  365:        if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
1.53      kristaps  366:                        SEC_PROLOGUE != m->lastnamed)
1.73      kristaps  367:                return(perr(m, ln, pp, EPROLBODY));
1.53      kristaps  368:
1.44      kristaps  369:        if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
1.53      kristaps  370:                        SEC_PROLOGUE == m->lastnamed)
1.73      kristaps  371:                return(perr(m, ln, pp, EBODYPROL));
1.53      kristaps  372:
                    373:        if (1 != pp && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
1.73      kristaps  374:                return(perr(m, ln, pp, ENOCALL));
1.53      kristaps  375:
                    376:        return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
1.1       kristaps  377: }
                    378:
                    379:
1.23      kristaps  380: static int
1.73      kristaps  381: perr(struct mdoc *m, int line, int pos, enum merr type)
                    382: {
                    383:        char            *p;
                    384:
                    385:        p = NULL;
                    386:        switch (type) {
                    387:        case (ENOCALL):
                    388:                p = "not callable";
                    389:                break;
                    390:        case (EPROLBODY):
                    391:                p = "macro disallowed in document body";
                    392:                break;
                    393:        case (EBODYPROL):
                    394:                p = "macro disallowed in document prologue";
                    395:                break;
                    396:        case (EMALLOC):
                    397:                p = "memory exhausted";
                    398:                break;
                    399:        case (ETEXTPROL):
                    400:                p = "text disallowed in document prologue";
                    401:                break;
                    402:        case (ENOBLANK):
                    403:                p = "blank lines disallowed in non-literal contexts";
                    404:                break;
                    405:        case (ESPACE):
                    406:                p = "whitespace disallowed after delimiter";
                    407:                break;
                    408:        }
                    409:        assert(p);
                    410:        return(mdoc_perr(m, line, pos, p));
                    411: }
                    412:
                    413:
                    414: static int
                    415: node_append(struct mdoc *mdoc, struct mdoc_node *p)
1.1       kristaps  416: {
                    417:
1.25      kristaps  418:        assert(mdoc->last);
                    419:        assert(mdoc->first);
                    420:        assert(MDOC_ROOT != p->type);
1.1       kristaps  421:
1.13      kristaps  422:        switch (mdoc->next) {
                    423:        case (MDOC_NEXT_SIBLING):
1.6       kristaps  424:                mdoc->last->next = p;
                    425:                p->prev = mdoc->last;
1.13      kristaps  426:                p->parent = mdoc->last->parent;
1.1       kristaps  427:                break;
1.13      kristaps  428:        case (MDOC_NEXT_CHILD):
                    429:                mdoc->last->child = p;
1.1       kristaps  430:                p->parent = mdoc->last;
                    431:                break;
                    432:        default:
1.13      kristaps  433:                abort();
                    434:                /* NOTREACHED */
1.1       kristaps  435:        }
                    436:
1.23      kristaps  437:        if ( ! mdoc_valid_pre(mdoc, p))
                    438:                return(0);
1.68      kristaps  439:        if ( ! mdoc_action_pre(mdoc, p))
                    440:                return(0);
1.27      kristaps  441:
                    442:        switch (p->type) {
                    443:        case (MDOC_HEAD):
                    444:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  445:                p->parent->head = p;
1.27      kristaps  446:                break;
                    447:        case (MDOC_TAIL):
                    448:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  449:                p->parent->tail = p;
1.27      kristaps  450:                break;
                    451:        case (MDOC_BODY):
                    452:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  453:                p->parent->body = p;
1.27      kristaps  454:                break;
                    455:        default:
                    456:                break;
                    457:        }
                    458:
1.1       kristaps  459:        mdoc->last = p;
1.71      kristaps  460:
                    461:        switch (p->type) {
                    462:        case (MDOC_TEXT):
                    463:                if ( ! mdoc_valid_post(mdoc))
                    464:                        return(0);
                    465:                if ( ! mdoc_action_post(mdoc))
                    466:                        return(0);
                    467:                break;
                    468:        default:
                    469:                break;
                    470:        }
                    471:
1.23      kristaps  472:        return(1);
1.1       kristaps  473: }
                    474:
                    475:
1.45      kristaps  476: static struct mdoc_node *
1.73      kristaps  477: node_alloc(struct mdoc *mdoc, int line,
                    478:                int pos, int tok, enum mdoc_type type)
1.45      kristaps  479: {
1.46      kristaps  480:        struct mdoc_node *p;
                    481:
1.73      kristaps  482:        if (NULL == (p = calloc(1, sizeof(struct mdoc_node)))) {
                    483:                (void)verr(mdoc, EMALLOC);
                    484:                return(NULL);
                    485:        }
                    486:
1.46      kristaps  487:        p->sec = mdoc->lastsec;
1.73      kristaps  488:        p->line = line;
                    489:        p->pos = pos;
                    490:        p->tok = tok;
                    491:        if (MDOC_TEXT != (p->type = type))
                    492:                assert(p->tok >= 0);
1.45      kristaps  493:
1.46      kristaps  494:        return(p);
1.45      kristaps  495: }
                    496:
                    497:
1.23      kristaps  498: int
1.22      kristaps  499: mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.17      kristaps  500: {
                    501:        struct mdoc_node *p;
                    502:
1.73      kristaps  503:        p = node_alloc(mdoc, line, pos, tok, MDOC_TAIL);
                    504:        if (NULL == p)
                    505:                return(0);
                    506:        return(node_append(mdoc, p));
1.17      kristaps  507: }
                    508:
                    509:
1.23      kristaps  510: int
1.22      kristaps  511: mdoc_head_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  512: {
                    513:        struct mdoc_node *p;
                    514:
                    515:        assert(mdoc->first);
                    516:        assert(mdoc->last);
                    517:
1.73      kristaps  518:        p = node_alloc(mdoc, line, pos, tok, MDOC_HEAD);
                    519:        if (NULL == p)
                    520:                return(0);
                    521:        return(node_append(mdoc, p));
1.1       kristaps  522: }
                    523:
                    524:
1.23      kristaps  525: int
1.22      kristaps  526: mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  527: {
                    528:        struct mdoc_node *p;
                    529:
1.73      kristaps  530:        p = node_alloc(mdoc, line, pos, tok, MDOC_BODY);
                    531:        if (NULL == p)
                    532:                return(0);
                    533:        return(node_append(mdoc, p));
1.1       kristaps  534: }
                    535:
                    536:
1.23      kristaps  537: int
1.22      kristaps  538: mdoc_block_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  539:                int tok, struct mdoc_arg *args)
1.1       kristaps  540: {
                    541:        struct mdoc_node *p;
                    542:
1.73      kristaps  543:        p = node_alloc(mdoc, line, pos, tok, MDOC_BLOCK);
                    544:        if (NULL == p)
                    545:                return(0);
1.77      kristaps  546:        p->args = args;
                    547:        if (p->args)
1.53      kristaps  548:                (args->refcnt)++;
1.73      kristaps  549:        return(node_append(mdoc, p));
1.1       kristaps  550: }
                    551:
                    552:
1.23      kristaps  553: int
1.22      kristaps  554: mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  555:                int tok, struct mdoc_arg *args)
1.1       kristaps  556: {
                    557:        struct mdoc_node *p;
                    558:
1.73      kristaps  559:        p = node_alloc(mdoc, line, pos, tok, MDOC_ELEM);
                    560:        if (NULL == p)
                    561:                return(0);
1.77      kristaps  562:        p->args = args;
                    563:        if (p->args)
1.53      kristaps  564:                (args->refcnt)++;
1.73      kristaps  565:        return(node_append(mdoc, p));
1.1       kristaps  566: }
                    567:
                    568:
1.23      kristaps  569: int
1.22      kristaps  570: mdoc_word_alloc(struct mdoc *mdoc,
                    571:                int line, int pos, const char *word)
1.1       kristaps  572: {
                    573:        struct mdoc_node *p;
                    574:
1.73      kristaps  575:        p = node_alloc(mdoc, line, pos, -1, MDOC_TEXT);
                    576:        if (NULL == p)
                    577:                return(0);
                    578:        if (NULL == (p->string = strdup(word))) {
                    579:                (void)verr(mdoc, EMALLOC);
                    580:                return(0);
                    581:        }
                    582:        return(node_append(mdoc, p));
1.1       kristaps  583: }
                    584:
                    585:
1.53      kristaps  586: void
                    587: mdoc_node_free(struct mdoc_node *p)
1.1       kristaps  588: {
                    589:
1.53      kristaps  590:        if (p->string)
                    591:                free(p->string);
                    592:        if (p->args)
                    593:                mdoc_argv_free(p->args);
1.1       kristaps  594:        free(p);
                    595: }
                    596:
                    597:
1.53      kristaps  598: void
                    599: mdoc_node_freelist(struct mdoc_node *p)
1.1       kristaps  600: {
                    601:
1.53      kristaps  602:        if (p->child)
                    603:                mdoc_node_freelist(p->child);
                    604:        if (p->next)
                    605:                mdoc_node_freelist(p->next);
1.1       kristaps  606:
1.53      kristaps  607:        mdoc_node_free(p);
1.1       kristaps  608: }
                    609:
                    610:
1.53      kristaps  611: /*
                    612:  * Parse free-form text, that is, a line that does not begin with the
                    613:  * control character.
                    614:  */
                    615: static int
1.68      kristaps  616: parsetext(struct mdoc *m, int line, char *buf)
1.1       kristaps  617: {
                    618:
1.68      kristaps  619:        if (SEC_PROLOGUE == m->lastnamed)
1.73      kristaps  620:                return(perr(m, line, 0, ETEXTPROL));
1.1       kristaps  621:
1.68      kristaps  622:        if (0 == buf[0] && ! (MDOC_LITERAL & m->flags))
1.73      kristaps  623:                return(perr(m, line, 0, ENOBLANK));
1.68      kristaps  624:
                    625:        if ( ! mdoc_word_alloc(m, line, 0, buf))
1.53      kristaps  626:                return(0);
1.1       kristaps  627:
1.68      kristaps  628:        m->next = MDOC_NEXT_SIBLING;
1.53      kristaps  629:        return(1);
1.1       kristaps  630: }
                    631:
                    632:
1.58      kristaps  633: static int
                    634: macrowarn(struct mdoc *m, int ln, const char *buf)
                    635: {
                    636:        if ( ! (MDOC_IGN_MACRO & m->pflags))
1.73      kristaps  637:                return(mdoc_perr(m, ln, 1,
                    638:                                "unknown macro: %s%s",
1.59      kristaps  639:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  640:        return(mdoc_pwarn(m, ln, 1, WARN_SYNTAX,
                    641:                                "unknown macro: %s%s",
1.59      kristaps  642:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  643: }
                    644:
                    645:
1.53      kristaps  646: /*
                    647:  * Parse a macro line, that is, a line beginning with the control
                    648:  * character.
                    649:  */
                    650: int
                    651: parsemacro(struct mdoc *m, int ln, char *buf)
1.1       kristaps  652: {
1.53      kristaps  653:        int               i, c;
                    654:        char              mac[5];
1.1       kristaps  655:
1.81      kristaps  656:        /* Empty lines are ignored. */
1.63      kristaps  657:
                    658:        if (0 == buf[1])
                    659:                return(1);
                    660:
1.65      kristaps  661:        if (' ' == buf[1]) {
1.63      kristaps  662:                i = 2;
1.65      kristaps  663:                while (buf[i] && ' ' == buf[i])
1.63      kristaps  664:                        i++;
                    665:                if (0 == buf[i])
                    666:                        return(1);
1.73      kristaps  667:                return(perr(m, ln, 1, ESPACE));
1.63      kristaps  668:        }
1.1       kristaps  669:
1.53      kristaps  670:        /* Copy the first word into a nil-terminated buffer. */
1.1       kristaps  671:
1.53      kristaps  672:        for (i = 1; i < 5; i++) {
                    673:                if (0 == (mac[i - 1] = buf[i]))
                    674:                        break;
1.65      kristaps  675:                else if (' ' == buf[i])
1.53      kristaps  676:                        break;
                    677:        }
1.1       kristaps  678:
1.53      kristaps  679:        mac[i - 1] = 0;
1.1       kristaps  680:
1.53      kristaps  681:        if (i == 5 || i <= 2) {
1.58      kristaps  682:                if ( ! macrowarn(m, ln, mac))
                    683:                        goto err;
                    684:                return(1);
1.53      kristaps  685:        }
                    686:
1.74      kristaps  687:        if (MDOC_MAX == (c = mdoc_hash_find(m->htab, mac))) {
1.58      kristaps  688:                if ( ! macrowarn(m, ln, mac))
                    689:                        goto err;
                    690:                return(1);
1.53      kristaps  691:        }
1.1       kristaps  692:
1.53      kristaps  693:        /* The macro is sane.  Jump to the next word. */
1.1       kristaps  694:
1.65      kristaps  695:        while (buf[i] && ' ' == buf[i])
1.53      kristaps  696:                i++;
1.1       kristaps  697:
1.53      kristaps  698:        /* Begin recursive parse sequence. */
1.1       kristaps  699:
1.53      kristaps  700:        if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
                    701:                goto err;
1.1       kristaps  702:
1.53      kristaps  703:        return(1);
1.1       kristaps  704:
1.53      kristaps  705: err:   /* Error out. */
1.1       kristaps  706:
1.53      kristaps  707:        m->flags |= MDOC_HALT;
                    708:        return(0);
1.1       kristaps  709: }

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