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Annotation of mandoc/mdoc.c, Revision 1.79

1.79    ! kristaps    1: /*     $Id: mdoc.c,v 1.78 2009/06/15 09:55:43 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
1.78      kristaps  296: mdoc_nerr(struct mdoc *mdoc, const struct mdoc_node *node, const char *fmt, ...)
                    297: {
                    298:        char             buf[256];
                    299:        va_list          ap;
                    300:
                    301:        if (NULL == mdoc->cb.mdoc_err)
                    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_err)(mdoc->data, node->line, node->pos, buf));
                    308: }
                    309:
                    310:
                    311: int
                    312: mdoc_warn(struct mdoc *mdoc, enum mdoc_warn type, const char *fmt, ...)
                    313: {
                    314:        char             buf[256];
                    315:        va_list          ap;
                    316:
                    317:        if (NULL == mdoc->cb.mdoc_warn)
                    318:                return(0);
                    319:
                    320:        va_start(ap, fmt);
                    321:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    322:        va_end(ap);
                    323:        return((*mdoc->cb.mdoc_warn)(mdoc->data, mdoc->last->line,
                    324:            mdoc->last->pos, type, buf));
                    325: }
                    326:
                    327:
                    328: int
                    329: mdoc_err(struct mdoc *mdoc, const char *fmt, ...)
                    330: {
                    331:        char             buf[256];
                    332:        va_list          ap;
                    333:
                    334:        if (NULL == mdoc->cb.mdoc_err)
                    335:                return(0);
                    336:
                    337:        va_start(ap, fmt);
                    338:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    339:        va_end(ap);
                    340:        return((*mdoc->cb.mdoc_err)(mdoc->data, mdoc->last->line,
                    341:            mdoc->last->pos, buf));
                    342: }
                    343:
                    344:
                    345: void
                    346: mdoc_msg(struct mdoc *mdoc, const char *fmt, ...)
                    347: {
                    348:        char              buf[256];
                    349:        va_list           ap;
                    350:
                    351:        if (NULL == mdoc->cb.mdoc_msg)
                    352:                return;
                    353:
                    354:        va_start(ap, fmt);
                    355:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    356:        va_end(ap);
                    357:        (*mdoc->cb.mdoc_msg)(mdoc->data, mdoc->last->line, mdoc->last->pos,
                    358:            buf);
                    359: }
                    360:
                    361:
                    362: void
                    363: mdoc_pmsg(struct mdoc *mdoc, int line, int pos, const char *fmt, ...)
                    364: {
                    365:        char              buf[256];
                    366:        va_list           ap;
                    367:
                    368:        if (NULL == mdoc->cb.mdoc_msg)
                    369:                return;
                    370:
                    371:        va_start(ap, fmt);
                    372:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    373:        va_end(ap);
                    374:        (*mdoc->cb.mdoc_msg)(mdoc->data, line, pos, buf);
                    375: }
                    376:
                    377:
                    378: int
                    379: mdoc_pwarn(struct mdoc *mdoc, int line, int pos, enum mdoc_warn type,
                    380:                const char *fmt, ...)
                    381: {
                    382:        char             buf[256];
                    383:        va_list          ap;
                    384:
                    385:        if (NULL == mdoc->cb.mdoc_warn)
                    386:                return(0);
                    387:
                    388:        va_start(ap, fmt);
                    389:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    390:        va_end(ap);
                    391:        return((*mdoc->cb.mdoc_warn)(mdoc->data, line, pos, type, buf));
                    392: }
                    393:
                    394: int
                    395: mdoc_perr(struct mdoc *mdoc, int line, int pos, const char *fmt, ...)
                    396: {
                    397:        char             buf[256];
                    398:        va_list          ap;
                    399:
                    400:        if (NULL == mdoc->cb.mdoc_err)
                    401:                return(0);
                    402:
                    403:        va_start(ap, fmt);
                    404:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    405:        va_end(ap);
                    406:        return((*mdoc->cb.mdoc_err)(mdoc->data, line, pos, buf));
                    407: }
                    408:
                    409:
                    410: int
1.53      kristaps  411: mdoc_macro(struct mdoc *m, int tok,
                    412:                int ln, int pp, int *pos, char *buf)
1.1       kristaps  413: {
                    414:
1.53      kristaps  415:        /* FIXME - these should happen during validation. */
1.31      kristaps  416:
1.44      kristaps  417:        if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
1.53      kristaps  418:                        SEC_PROLOGUE != m->lastnamed)
1.73      kristaps  419:                return(perr(m, ln, pp, EPROLBODY));
1.53      kristaps  420:
1.44      kristaps  421:        if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
1.53      kristaps  422:                        SEC_PROLOGUE == m->lastnamed)
1.73      kristaps  423:                return(perr(m, ln, pp, EBODYPROL));
1.53      kristaps  424:
                    425:        if (1 != pp && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
1.73      kristaps  426:                return(perr(m, ln, pp, ENOCALL));
1.53      kristaps  427:
                    428:        return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
1.1       kristaps  429: }
                    430:
                    431:
1.23      kristaps  432: static int
1.73      kristaps  433: perr(struct mdoc *m, int line, int pos, enum merr type)
                    434: {
                    435:        char            *p;
                    436:
                    437:        p = NULL;
                    438:        switch (type) {
                    439:        case (ENOCALL):
                    440:                p = "not callable";
                    441:                break;
                    442:        case (EPROLBODY):
                    443:                p = "macro disallowed in document body";
                    444:                break;
                    445:        case (EBODYPROL):
                    446:                p = "macro disallowed in document prologue";
                    447:                break;
                    448:        case (EMALLOC):
                    449:                p = "memory exhausted";
                    450:                break;
                    451:        case (ETEXTPROL):
                    452:                p = "text disallowed in document prologue";
                    453:                break;
                    454:        case (ENOBLANK):
                    455:                p = "blank lines disallowed in non-literal contexts";
                    456:                break;
                    457:        case (ESPACE):
                    458:                p = "whitespace disallowed after delimiter";
                    459:                break;
                    460:        }
                    461:        assert(p);
                    462:        return(mdoc_perr(m, line, pos, p));
                    463: }
                    464:
                    465:
                    466: static int
                    467: node_append(struct mdoc *mdoc, struct mdoc_node *p)
1.1       kristaps  468: {
                    469:
1.25      kristaps  470:        assert(mdoc->last);
                    471:        assert(mdoc->first);
                    472:        assert(MDOC_ROOT != p->type);
1.1       kristaps  473:
1.13      kristaps  474:        switch (mdoc->next) {
                    475:        case (MDOC_NEXT_SIBLING):
1.6       kristaps  476:                mdoc->last->next = p;
                    477:                p->prev = mdoc->last;
1.13      kristaps  478:                p->parent = mdoc->last->parent;
1.1       kristaps  479:                break;
1.13      kristaps  480:        case (MDOC_NEXT_CHILD):
                    481:                mdoc->last->child = p;
1.1       kristaps  482:                p->parent = mdoc->last;
                    483:                break;
                    484:        default:
1.13      kristaps  485:                abort();
                    486:                /* NOTREACHED */
1.1       kristaps  487:        }
                    488:
1.23      kristaps  489:        if ( ! mdoc_valid_pre(mdoc, p))
                    490:                return(0);
1.68      kristaps  491:        if ( ! mdoc_action_pre(mdoc, p))
                    492:                return(0);
1.27      kristaps  493:
                    494:        switch (p->type) {
                    495:        case (MDOC_HEAD):
                    496:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  497:                p->parent->head = p;
1.27      kristaps  498:                break;
                    499:        case (MDOC_TAIL):
                    500:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  501:                p->parent->tail = p;
1.27      kristaps  502:                break;
                    503:        case (MDOC_BODY):
                    504:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  505:                p->parent->body = p;
1.27      kristaps  506:                break;
                    507:        default:
                    508:                break;
                    509:        }
                    510:
1.1       kristaps  511:        mdoc->last = p;
1.71      kristaps  512:
                    513:        switch (p->type) {
                    514:        case (MDOC_TEXT):
                    515:                if ( ! mdoc_valid_post(mdoc))
                    516:                        return(0);
                    517:                if ( ! mdoc_action_post(mdoc))
                    518:                        return(0);
                    519:                break;
                    520:        default:
                    521:                break;
                    522:        }
                    523:
1.23      kristaps  524:        return(1);
1.1       kristaps  525: }
                    526:
                    527:
1.45      kristaps  528: static struct mdoc_node *
1.73      kristaps  529: node_alloc(struct mdoc *mdoc, int line,
                    530:                int pos, int tok, enum mdoc_type type)
1.45      kristaps  531: {
1.46      kristaps  532:        struct mdoc_node *p;
                    533:
1.73      kristaps  534:        if (NULL == (p = calloc(1, sizeof(struct mdoc_node)))) {
                    535:                (void)verr(mdoc, EMALLOC);
                    536:                return(NULL);
                    537:        }
                    538:
1.46      kristaps  539:        p->sec = mdoc->lastsec;
1.73      kristaps  540:        p->line = line;
                    541:        p->pos = pos;
                    542:        p->tok = tok;
                    543:        if (MDOC_TEXT != (p->type = type))
                    544:                assert(p->tok >= 0);
1.45      kristaps  545:
1.46      kristaps  546:        return(p);
1.45      kristaps  547: }
                    548:
                    549:
1.23      kristaps  550: int
1.22      kristaps  551: mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.17      kristaps  552: {
                    553:        struct mdoc_node *p;
                    554:
1.73      kristaps  555:        p = node_alloc(mdoc, line, pos, tok, MDOC_TAIL);
                    556:        if (NULL == p)
                    557:                return(0);
                    558:        return(node_append(mdoc, p));
1.17      kristaps  559: }
                    560:
                    561:
1.23      kristaps  562: int
1.22      kristaps  563: mdoc_head_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  564: {
                    565:        struct mdoc_node *p;
                    566:
                    567:        assert(mdoc->first);
                    568:        assert(mdoc->last);
                    569:
1.73      kristaps  570:        p = node_alloc(mdoc, line, pos, tok, MDOC_HEAD);
                    571:        if (NULL == p)
                    572:                return(0);
                    573:        return(node_append(mdoc, p));
1.1       kristaps  574: }
                    575:
                    576:
1.23      kristaps  577: int
1.22      kristaps  578: mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  579: {
                    580:        struct mdoc_node *p;
                    581:
1.73      kristaps  582:        p = node_alloc(mdoc, line, pos, tok, MDOC_BODY);
                    583:        if (NULL == p)
                    584:                return(0);
                    585:        return(node_append(mdoc, p));
1.1       kristaps  586: }
                    587:
                    588:
1.23      kristaps  589: int
1.22      kristaps  590: mdoc_block_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  591:                int tok, struct mdoc_arg *args)
1.1       kristaps  592: {
                    593:        struct mdoc_node *p;
                    594:
1.73      kristaps  595:        p = node_alloc(mdoc, line, pos, tok, MDOC_BLOCK);
                    596:        if (NULL == p)
                    597:                return(0);
1.77      kristaps  598:        p->args = args;
                    599:        if (p->args)
1.53      kristaps  600:                (args->refcnt)++;
1.73      kristaps  601:        return(node_append(mdoc, p));
1.1       kristaps  602: }
                    603:
                    604:
1.23      kristaps  605: int
1.22      kristaps  606: mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  607:                int tok, struct mdoc_arg *args)
1.1       kristaps  608: {
                    609:        struct mdoc_node *p;
                    610:
1.73      kristaps  611:        p = node_alloc(mdoc, line, pos, tok, MDOC_ELEM);
                    612:        if (NULL == p)
                    613:                return(0);
1.77      kristaps  614:        p->args = args;
                    615:        if (p->args)
1.53      kristaps  616:                (args->refcnt)++;
1.73      kristaps  617:        return(node_append(mdoc, p));
1.1       kristaps  618: }
                    619:
                    620:
1.23      kristaps  621: int
1.22      kristaps  622: mdoc_word_alloc(struct mdoc *mdoc,
                    623:                int line, int pos, const char *word)
1.1       kristaps  624: {
                    625:        struct mdoc_node *p;
                    626:
1.73      kristaps  627:        p = node_alloc(mdoc, line, pos, -1, MDOC_TEXT);
                    628:        if (NULL == p)
                    629:                return(0);
                    630:        if (NULL == (p->string = strdup(word))) {
                    631:                (void)verr(mdoc, EMALLOC);
                    632:                return(0);
                    633:        }
                    634:        return(node_append(mdoc, p));
1.1       kristaps  635: }
                    636:
                    637:
1.53      kristaps  638: void
                    639: mdoc_node_free(struct mdoc_node *p)
1.1       kristaps  640: {
                    641:
1.53      kristaps  642:        if (p->string)
                    643:                free(p->string);
                    644:        if (p->args)
                    645:                mdoc_argv_free(p->args);
1.1       kristaps  646:        free(p);
                    647: }
                    648:
                    649:
1.53      kristaps  650: void
                    651: mdoc_node_freelist(struct mdoc_node *p)
1.1       kristaps  652: {
                    653:
1.53      kristaps  654:        if (p->child)
                    655:                mdoc_node_freelist(p->child);
                    656:        if (p->next)
                    657:                mdoc_node_freelist(p->next);
1.1       kristaps  658:
1.53      kristaps  659:        mdoc_node_free(p);
1.1       kristaps  660: }
                    661:
                    662:
1.53      kristaps  663: /*
                    664:  * Parse free-form text, that is, a line that does not begin with the
                    665:  * control character.
                    666:  */
                    667: static int
1.68      kristaps  668: parsetext(struct mdoc *m, int line, char *buf)
1.1       kristaps  669: {
                    670:
1.68      kristaps  671:        if (SEC_PROLOGUE == m->lastnamed)
1.73      kristaps  672:                return(perr(m, line, 0, ETEXTPROL));
1.1       kristaps  673:
1.68      kristaps  674:        if (0 == buf[0] && ! (MDOC_LITERAL & m->flags))
1.73      kristaps  675:                return(perr(m, line, 0, ENOBLANK));
1.68      kristaps  676:
                    677:        if ( ! mdoc_word_alloc(m, line, 0, buf))
1.53      kristaps  678:                return(0);
1.1       kristaps  679:
1.68      kristaps  680:        m->next = MDOC_NEXT_SIBLING;
1.53      kristaps  681:        return(1);
1.1       kristaps  682: }
                    683:
                    684:
1.58      kristaps  685: static int
                    686: macrowarn(struct mdoc *m, int ln, const char *buf)
                    687: {
                    688:        if ( ! (MDOC_IGN_MACRO & m->pflags))
1.73      kristaps  689:                return(mdoc_perr(m, ln, 1,
                    690:                                "unknown macro: %s%s",
1.59      kristaps  691:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  692:        return(mdoc_pwarn(m, ln, 1, WARN_SYNTAX,
                    693:                                "unknown macro: %s%s",
1.59      kristaps  694:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  695: }
                    696:
                    697:
                    698:
1.53      kristaps  699: /*
                    700:  * Parse a macro line, that is, a line beginning with the control
                    701:  * character.
                    702:  */
                    703: int
                    704: parsemacro(struct mdoc *m, int ln, char *buf)
1.1       kristaps  705: {
1.53      kristaps  706:        int               i, c;
                    707:        char              mac[5];
1.1       kristaps  708:
1.63      kristaps  709:        /* Comments and empties are quickly ignored. */
                    710:
                    711:        if (0 == buf[1])
                    712:                return(1);
                    713:
1.65      kristaps  714:        if (' ' == buf[1]) {
1.63      kristaps  715:                i = 2;
1.65      kristaps  716:                while (buf[i] && ' ' == buf[i])
1.63      kristaps  717:                        i++;
                    718:                if (0 == buf[i])
                    719:                        return(1);
1.73      kristaps  720:                return(perr(m, ln, 1, ESPACE));
1.63      kristaps  721:        }
1.1       kristaps  722:
1.53      kristaps  723:        if (buf[1] && '\\' == buf[1])
                    724:                if (buf[2] && '\"' == buf[2])
                    725:                        return(1);
1.1       kristaps  726:
1.53      kristaps  727:        /* Copy the first word into a nil-terminated buffer. */
1.1       kristaps  728:
1.53      kristaps  729:        for (i = 1; i < 5; i++) {
                    730:                if (0 == (mac[i - 1] = buf[i]))
                    731:                        break;
1.65      kristaps  732:                else if (' ' == buf[i])
1.53      kristaps  733:                        break;
                    734:        }
1.1       kristaps  735:
1.53      kristaps  736:        mac[i - 1] = 0;
1.1       kristaps  737:
1.53      kristaps  738:        if (i == 5 || i <= 2) {
1.58      kristaps  739:                if ( ! macrowarn(m, ln, mac))
                    740:                        goto err;
                    741:                return(1);
1.53      kristaps  742:        }
                    743:
1.74      kristaps  744:        if (MDOC_MAX == (c = mdoc_hash_find(m->htab, mac))) {
1.58      kristaps  745:                if ( ! macrowarn(m, ln, mac))
                    746:                        goto err;
                    747:                return(1);
1.53      kristaps  748:        }
1.1       kristaps  749:
1.53      kristaps  750:        /* The macro is sane.  Jump to the next word. */
1.1       kristaps  751:
1.65      kristaps  752:        while (buf[i] && ' ' == buf[i])
1.53      kristaps  753:                i++;
1.1       kristaps  754:
1.53      kristaps  755:        /* Begin recursive parse sequence. */
1.1       kristaps  756:
1.53      kristaps  757:        if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
                    758:                goto err;
1.1       kristaps  759:
1.53      kristaps  760:        return(1);
1.1       kristaps  761:
1.53      kristaps  762: err:   /* Error out. */
1.1       kristaps  763:
1.53      kristaps  764:        m->flags |= MDOC_HALT;
                    765:        return(0);
1.1       kristaps  766: }

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