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Annotation of mandoc/mdoc.c, Revision 1.81

1.81    ! kristaps    1: /*     $Id: mdoc.c,v 1.80 2009/06/15 10:36:01 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: int
1.31      kristaps  246: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
                    247:                const char *fmt, ...)
1.1       kristaps  248: {
1.31      kristaps  249:        char             buf[256];
                    250:        va_list          ap;
1.1       kristaps  251:
                    252:        if (NULL == mdoc->cb.mdoc_err)
                    253:                return(0);
1.31      kristaps  254:
                    255:        va_start(ap, fmt);
                    256:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    257:        va_end(ap);
                    258:        return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
1.1       kristaps  259: }
                    260:
                    261:
                    262: int
1.31      kristaps  263: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos,
                    264:                enum mdoc_warn type, const char *fmt, ...)
1.1       kristaps  265: {
1.31      kristaps  266:        char             buf[256];
                    267:        va_list          ap;
1.1       kristaps  268:
                    269:        if (NULL == mdoc->cb.mdoc_warn)
                    270:                return(0);
1.31      kristaps  271:
                    272:        va_start(ap, fmt);
                    273:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    274:        va_end(ap);
                    275:        return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, type, buf));
1.1       kristaps  276: }
                    277:
                    278:
                    279: int
1.78      kristaps  280: mdoc_nerr(struct mdoc *mdoc, const struct mdoc_node *node, const char *fmt, ...)
                    281: {
                    282:        char             buf[256];
                    283:        va_list          ap;
                    284:
                    285:        if (NULL == mdoc->cb.mdoc_err)
                    286:                return(0);
                    287:
                    288:        va_start(ap, fmt);
                    289:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    290:        va_end(ap);
                    291:        return((*mdoc->cb.mdoc_err)(mdoc->data, node->line, node->pos, buf));
                    292: }
                    293:
                    294:
                    295: int
                    296: mdoc_warn(struct mdoc *mdoc, enum mdoc_warn type, const char *fmt, ...)
                    297: {
                    298:        char             buf[256];
                    299:        va_list          ap;
                    300:
                    301:        if (NULL == mdoc->cb.mdoc_warn)
                    302:                return(0);
                    303:
                    304:        va_start(ap, fmt);
                    305:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    306:        va_end(ap);
                    307:        return((*mdoc->cb.mdoc_warn)(mdoc->data, mdoc->last->line,
                    308:            mdoc->last->pos, type, buf));
                    309: }
                    310:
                    311:
                    312: int
                    313: mdoc_err(struct mdoc *mdoc, const char *fmt, ...)
                    314: {
                    315:        char             buf[256];
                    316:        va_list          ap;
                    317:
                    318:        if (NULL == mdoc->cb.mdoc_err)
                    319:                return(0);
                    320:
                    321:        va_start(ap, fmt);
                    322:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    323:        va_end(ap);
                    324:        return((*mdoc->cb.mdoc_err)(mdoc->data, mdoc->last->line,
                    325:            mdoc->last->pos, buf));
                    326: }
                    327:
                    328:
                    329: int
                    330: mdoc_pwarn(struct mdoc *mdoc, int line, int pos, enum mdoc_warn type,
                    331:                const char *fmt, ...)
                    332: {
                    333:        char             buf[256];
                    334:        va_list          ap;
                    335:
                    336:        if (NULL == mdoc->cb.mdoc_warn)
                    337:                return(0);
                    338:
                    339:        va_start(ap, fmt);
                    340:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    341:        va_end(ap);
                    342:        return((*mdoc->cb.mdoc_warn)(mdoc->data, line, pos, type, buf));
                    343: }
                    344:
                    345: int
                    346: mdoc_perr(struct mdoc *mdoc, int line, int pos, const char *fmt, ...)
                    347: {
                    348:        char             buf[256];
                    349:        va_list          ap;
                    350:
                    351:        if (NULL == mdoc->cb.mdoc_err)
                    352:                return(0);
                    353:
                    354:        va_start(ap, fmt);
                    355:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    356:        va_end(ap);
                    357:        return((*mdoc->cb.mdoc_err)(mdoc->data, line, pos, buf));
                    358: }
                    359:
                    360:
                    361: int
1.53      kristaps  362: mdoc_macro(struct mdoc *m, int tok,
                    363:                int ln, int pp, int *pos, char *buf)
1.1       kristaps  364: {
                    365:
1.53      kristaps  366:        /* FIXME - these should happen during validation. */
1.31      kristaps  367:
1.44      kristaps  368:        if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
1.53      kristaps  369:                        SEC_PROLOGUE != m->lastnamed)
1.73      kristaps  370:                return(perr(m, ln, pp, EPROLBODY));
1.53      kristaps  371:
1.44      kristaps  372:        if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
1.53      kristaps  373:                        SEC_PROLOGUE == m->lastnamed)
1.73      kristaps  374:                return(perr(m, ln, pp, EBODYPROL));
1.53      kristaps  375:
                    376:        if (1 != pp && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
1.73      kristaps  377:                return(perr(m, ln, pp, ENOCALL));
1.53      kristaps  378:
                    379:        return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
1.1       kristaps  380: }
                    381:
                    382:
1.23      kristaps  383: static int
1.73      kristaps  384: perr(struct mdoc *m, int line, int pos, enum merr type)
                    385: {
                    386:        char            *p;
                    387:
                    388:        p = NULL;
                    389:        switch (type) {
                    390:        case (ENOCALL):
                    391:                p = "not callable";
                    392:                break;
                    393:        case (EPROLBODY):
                    394:                p = "macro disallowed in document body";
                    395:                break;
                    396:        case (EBODYPROL):
                    397:                p = "macro disallowed in document prologue";
                    398:                break;
                    399:        case (EMALLOC):
                    400:                p = "memory exhausted";
                    401:                break;
                    402:        case (ETEXTPROL):
                    403:                p = "text disallowed in document prologue";
                    404:                break;
                    405:        case (ENOBLANK):
                    406:                p = "blank lines disallowed in non-literal contexts";
                    407:                break;
                    408:        case (ESPACE):
                    409:                p = "whitespace disallowed after delimiter";
                    410:                break;
                    411:        }
                    412:        assert(p);
                    413:        return(mdoc_perr(m, line, pos, p));
                    414: }
                    415:
                    416:
                    417: static int
                    418: node_append(struct mdoc *mdoc, struct mdoc_node *p)
1.1       kristaps  419: {
                    420:
1.25      kristaps  421:        assert(mdoc->last);
                    422:        assert(mdoc->first);
                    423:        assert(MDOC_ROOT != p->type);
1.1       kristaps  424:
1.13      kristaps  425:        switch (mdoc->next) {
                    426:        case (MDOC_NEXT_SIBLING):
1.6       kristaps  427:                mdoc->last->next = p;
                    428:                p->prev = mdoc->last;
1.13      kristaps  429:                p->parent = mdoc->last->parent;
1.1       kristaps  430:                break;
1.13      kristaps  431:        case (MDOC_NEXT_CHILD):
                    432:                mdoc->last->child = p;
1.1       kristaps  433:                p->parent = mdoc->last;
                    434:                break;
                    435:        default:
1.13      kristaps  436:                abort();
                    437:                /* NOTREACHED */
1.1       kristaps  438:        }
                    439:
1.23      kristaps  440:        if ( ! mdoc_valid_pre(mdoc, p))
                    441:                return(0);
1.68      kristaps  442:        if ( ! mdoc_action_pre(mdoc, p))
                    443:                return(0);
1.27      kristaps  444:
                    445:        switch (p->type) {
                    446:        case (MDOC_HEAD):
                    447:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  448:                p->parent->head = p;
1.27      kristaps  449:                break;
                    450:        case (MDOC_TAIL):
                    451:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  452:                p->parent->tail = p;
1.27      kristaps  453:                break;
                    454:        case (MDOC_BODY):
                    455:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  456:                p->parent->body = p;
1.27      kristaps  457:                break;
                    458:        default:
                    459:                break;
                    460:        }
                    461:
1.1       kristaps  462:        mdoc->last = p;
1.71      kristaps  463:
                    464:        switch (p->type) {
                    465:        case (MDOC_TEXT):
                    466:                if ( ! mdoc_valid_post(mdoc))
                    467:                        return(0);
                    468:                if ( ! mdoc_action_post(mdoc))
                    469:                        return(0);
                    470:                break;
                    471:        default:
                    472:                break;
                    473:        }
                    474:
1.23      kristaps  475:        return(1);
1.1       kristaps  476: }
                    477:
                    478:
1.45      kristaps  479: static struct mdoc_node *
1.73      kristaps  480: node_alloc(struct mdoc *mdoc, int line,
                    481:                int pos, int tok, enum mdoc_type type)
1.45      kristaps  482: {
1.46      kristaps  483:        struct mdoc_node *p;
                    484:
1.73      kristaps  485:        if (NULL == (p = calloc(1, sizeof(struct mdoc_node)))) {
                    486:                (void)verr(mdoc, EMALLOC);
                    487:                return(NULL);
                    488:        }
                    489:
1.46      kristaps  490:        p->sec = mdoc->lastsec;
1.73      kristaps  491:        p->line = line;
                    492:        p->pos = pos;
                    493:        p->tok = tok;
                    494:        if (MDOC_TEXT != (p->type = type))
                    495:                assert(p->tok >= 0);
1.45      kristaps  496:
1.46      kristaps  497:        return(p);
1.45      kristaps  498: }
                    499:
                    500:
1.23      kristaps  501: int
1.22      kristaps  502: mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.17      kristaps  503: {
                    504:        struct mdoc_node *p;
                    505:
1.73      kristaps  506:        p = node_alloc(mdoc, line, pos, tok, MDOC_TAIL);
                    507:        if (NULL == p)
                    508:                return(0);
                    509:        return(node_append(mdoc, p));
1.17      kristaps  510: }
                    511:
                    512:
1.23      kristaps  513: int
1.22      kristaps  514: mdoc_head_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  515: {
                    516:        struct mdoc_node *p;
                    517:
                    518:        assert(mdoc->first);
                    519:        assert(mdoc->last);
                    520:
1.73      kristaps  521:        p = node_alloc(mdoc, line, pos, tok, MDOC_HEAD);
                    522:        if (NULL == p)
                    523:                return(0);
                    524:        return(node_append(mdoc, p));
1.1       kristaps  525: }
                    526:
                    527:
1.23      kristaps  528: int
1.22      kristaps  529: mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  530: {
                    531:        struct mdoc_node *p;
                    532:
1.73      kristaps  533:        p = node_alloc(mdoc, line, pos, tok, MDOC_BODY);
                    534:        if (NULL == p)
                    535:                return(0);
                    536:        return(node_append(mdoc, p));
1.1       kristaps  537: }
                    538:
                    539:
1.23      kristaps  540: int
1.22      kristaps  541: mdoc_block_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  542:                int tok, struct mdoc_arg *args)
1.1       kristaps  543: {
                    544:        struct mdoc_node *p;
                    545:
1.73      kristaps  546:        p = node_alloc(mdoc, line, pos, tok, MDOC_BLOCK);
                    547:        if (NULL == p)
                    548:                return(0);
1.77      kristaps  549:        p->args = args;
                    550:        if (p->args)
1.53      kristaps  551:                (args->refcnt)++;
1.73      kristaps  552:        return(node_append(mdoc, p));
1.1       kristaps  553: }
                    554:
                    555:
1.23      kristaps  556: int
1.22      kristaps  557: mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  558:                int tok, struct mdoc_arg *args)
1.1       kristaps  559: {
                    560:        struct mdoc_node *p;
                    561:
1.73      kristaps  562:        p = node_alloc(mdoc, line, pos, tok, MDOC_ELEM);
                    563:        if (NULL == p)
                    564:                return(0);
1.77      kristaps  565:        p->args = args;
                    566:        if (p->args)
1.53      kristaps  567:                (args->refcnt)++;
1.73      kristaps  568:        return(node_append(mdoc, p));
1.1       kristaps  569: }
                    570:
                    571:
1.23      kristaps  572: int
1.22      kristaps  573: mdoc_word_alloc(struct mdoc *mdoc,
                    574:                int line, int pos, const char *word)
1.1       kristaps  575: {
                    576:        struct mdoc_node *p;
                    577:
1.73      kristaps  578:        p = node_alloc(mdoc, line, pos, -1, MDOC_TEXT);
                    579:        if (NULL == p)
                    580:                return(0);
                    581:        if (NULL == (p->string = strdup(word))) {
                    582:                (void)verr(mdoc, EMALLOC);
                    583:                return(0);
                    584:        }
                    585:        return(node_append(mdoc, p));
1.1       kristaps  586: }
                    587:
                    588:
1.53      kristaps  589: void
                    590: mdoc_node_free(struct mdoc_node *p)
1.1       kristaps  591: {
                    592:
1.53      kristaps  593:        if (p->string)
                    594:                free(p->string);
                    595:        if (p->args)
                    596:                mdoc_argv_free(p->args);
1.1       kristaps  597:        free(p);
                    598: }
                    599:
                    600:
1.53      kristaps  601: void
                    602: mdoc_node_freelist(struct mdoc_node *p)
1.1       kristaps  603: {
                    604:
1.53      kristaps  605:        if (p->child)
                    606:                mdoc_node_freelist(p->child);
                    607:        if (p->next)
                    608:                mdoc_node_freelist(p->next);
1.1       kristaps  609:
1.53      kristaps  610:        mdoc_node_free(p);
1.1       kristaps  611: }
                    612:
                    613:
1.53      kristaps  614: /*
                    615:  * Parse free-form text, that is, a line that does not begin with the
                    616:  * control character.
                    617:  */
                    618: static int
1.68      kristaps  619: parsetext(struct mdoc *m, int line, char *buf)
1.1       kristaps  620: {
                    621:
1.68      kristaps  622:        if (SEC_PROLOGUE == m->lastnamed)
1.73      kristaps  623:                return(perr(m, line, 0, ETEXTPROL));
1.1       kristaps  624:
1.68      kristaps  625:        if (0 == buf[0] && ! (MDOC_LITERAL & m->flags))
1.73      kristaps  626:                return(perr(m, line, 0, ENOBLANK));
1.68      kristaps  627:
                    628:        if ( ! mdoc_word_alloc(m, line, 0, buf))
1.53      kristaps  629:                return(0);
1.1       kristaps  630:
1.68      kristaps  631:        m->next = MDOC_NEXT_SIBLING;
1.53      kristaps  632:        return(1);
1.1       kristaps  633: }
                    634:
                    635:
1.58      kristaps  636: static int
                    637: macrowarn(struct mdoc *m, int ln, const char *buf)
                    638: {
                    639:        if ( ! (MDOC_IGN_MACRO & m->pflags))
1.73      kristaps  640:                return(mdoc_perr(m, ln, 1,
                    641:                                "unknown macro: %s%s",
1.59      kristaps  642:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  643:        return(mdoc_pwarn(m, ln, 1, WARN_SYNTAX,
                    644:                                "unknown macro: %s%s",
1.59      kristaps  645:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  646: }
                    647:
                    648:
                    649:
1.53      kristaps  650: /*
                    651:  * Parse a macro line, that is, a line beginning with the control
                    652:  * character.
                    653:  */
                    654: int
                    655: parsemacro(struct mdoc *m, int ln, char *buf)
1.1       kristaps  656: {
1.53      kristaps  657:        int               i, c;
                    658:        char              mac[5];
1.1       kristaps  659:
1.81    ! kristaps  660:        /* Empty lines are ignored. */
1.63      kristaps  661:
                    662:        if (0 == buf[1])
                    663:                return(1);
                    664:
1.65      kristaps  665:        if (' ' == buf[1]) {
1.63      kristaps  666:                i = 2;
1.65      kristaps  667:                while (buf[i] && ' ' == buf[i])
1.63      kristaps  668:                        i++;
                    669:                if (0 == buf[i])
                    670:                        return(1);
1.73      kristaps  671:                return(perr(m, ln, 1, ESPACE));
1.63      kristaps  672:        }
1.1       kristaps  673:
1.53      kristaps  674:        /* Copy the first word into a nil-terminated buffer. */
1.1       kristaps  675:
1.53      kristaps  676:        for (i = 1; i < 5; i++) {
                    677:                if (0 == (mac[i - 1] = buf[i]))
                    678:                        break;
1.65      kristaps  679:                else if (' ' == buf[i])
1.53      kristaps  680:                        break;
                    681:        }
1.1       kristaps  682:
1.53      kristaps  683:        mac[i - 1] = 0;
1.1       kristaps  684:
1.53      kristaps  685:        if (i == 5 || i <= 2) {
1.58      kristaps  686:                if ( ! macrowarn(m, ln, mac))
                    687:                        goto err;
                    688:                return(1);
1.53      kristaps  689:        }
                    690:
1.74      kristaps  691:        if (MDOC_MAX == (c = mdoc_hash_find(m->htab, mac))) {
1.58      kristaps  692:                if ( ! macrowarn(m, ln, mac))
                    693:                        goto err;
                    694:                return(1);
1.53      kristaps  695:        }
1.1       kristaps  696:
1.53      kristaps  697:        /* The macro is sane.  Jump to the next word. */
1.1       kristaps  698:
1.65      kristaps  699:        while (buf[i] && ' ' == buf[i])
1.53      kristaps  700:                i++;
1.1       kristaps  701:
1.53      kristaps  702:        /* Begin recursive parse sequence. */
1.1       kristaps  703:
1.53      kristaps  704:        if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
                    705:                goto err;
1.1       kristaps  706:
1.53      kristaps  707:        return(1);
1.1       kristaps  708:
1.53      kristaps  709: err:   /* Error out. */
1.1       kristaps  710:
1.53      kristaps  711:        m->flags |= MDOC_HALT;
                    712:        return(0);
1.1       kristaps  713: }

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