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Annotation of mandoc/mdoc.c, Revision 1.84

1.84    ! kristaps    1: /*     $Id: mdoc.c,v 1.83 2009/06/16 20:22:23 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:
1.1       kristaps  100: const struct mdoc_node *
1.71      kristaps  101: mdoc_node(const struct mdoc *m)
1.1       kristaps  102: {
                    103:
1.71      kristaps  104:        return(MDOC_HALT & m->flags ? NULL : m->first);
1.1       kristaps  105: }
                    106:
                    107:
1.37      kristaps  108: const struct mdoc_meta *
1.71      kristaps  109: mdoc_meta(const struct mdoc *m)
1.37      kristaps  110: {
                    111:
1.71      kristaps  112:        return(MDOC_HALT & m->flags ? NULL : &m->meta);
1.37      kristaps  113: }
                    114:
                    115:
1.73      kristaps  116: static void
                    117: mdoc_free1(struct mdoc *mdoc)
1.67      kristaps  118: {
                    119:
                    120:        if (mdoc->first)
                    121:                mdoc_node_freelist(mdoc->first);
                    122:        if (mdoc->meta.title)
                    123:                free(mdoc->meta.title);
                    124:        if (mdoc->meta.os)
                    125:                free(mdoc->meta.os);
                    126:        if (mdoc->meta.name)
                    127:                free(mdoc->meta.name);
                    128:        if (mdoc->meta.arch)
                    129:                free(mdoc->meta.arch);
                    130:        if (mdoc->meta.vol)
                    131:                free(mdoc->meta.vol);
1.73      kristaps  132: }
                    133:
                    134:
                    135: static int
                    136: mdoc_alloc1(struct mdoc *mdoc)
                    137: {
1.67      kristaps  138:
                    139:        bzero(&mdoc->meta, sizeof(struct mdoc_meta));
                    140:        mdoc->flags = 0;
                    141:        mdoc->lastnamed = mdoc->lastsec = 0;
1.70      kristaps  142:        mdoc->last = calloc(1, sizeof(struct mdoc_node));
                    143:        if (NULL == mdoc->last)
1.73      kristaps  144:                return(0);
                    145:
1.70      kristaps  146:        mdoc->first = mdoc->last;
1.67      kristaps  147:        mdoc->last->type = MDOC_ROOT;
                    148:        mdoc->next = MDOC_NEXT_CHILD;
1.73      kristaps  149:        return(1);
                    150: }
                    151:
                    152:
                    153: /*
                    154:  * Free up all resources contributed by a parse:  the node tree,
                    155:  * meta-data and so on.  Then reallocate the root node for another
                    156:  * parse.
                    157:  */
                    158: int
                    159: mdoc_reset(struct mdoc *mdoc)
                    160: {
                    161:
                    162:        mdoc_free1(mdoc);
                    163:        return(mdoc_alloc1(mdoc));
1.67      kristaps  164: }
                    165:
                    166:
1.68      kristaps  167: /*
                    168:  * Completely free up all resources.
                    169:  */
1.67      kristaps  170: void
1.38      kristaps  171: mdoc_free(struct mdoc *mdoc)
1.34      kristaps  172: {
                    173:
1.73      kristaps  174:        mdoc_free1(mdoc);
1.68      kristaps  175:        if (mdoc->htab)
1.74      kristaps  176:                mdoc_hash_free(mdoc->htab);
1.1       kristaps  177:        free(mdoc);
                    178: }
                    179:
                    180:
                    181: struct mdoc *
1.55      kristaps  182: mdoc_alloc(void *data, int pflags, const struct mdoc_cb *cb)
1.1       kristaps  183: {
                    184:        struct mdoc     *p;
                    185:
1.70      kristaps  186:        if (NULL == (p = calloc(1, sizeof(struct mdoc))))
1.73      kristaps  187:                return(NULL);
1.74      kristaps  188:        if (cb)
                    189:                (void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
1.1       kristaps  190:
                    191:        p->data = data;
1.73      kristaps  192:        p->pflags = pflags;
                    193:
1.74      kristaps  194:        if (NULL == (p->htab = mdoc_hash_alloc())) {
                    195:                free(p);
                    196:                return(NULL);
                    197:        } else if (mdoc_alloc1(p))
                    198:                return(p);
1.1       kristaps  199:
1.73      kristaps  200:        free(p);
                    201:        return(NULL);
1.1       kristaps  202: }
                    203:
                    204:
1.68      kristaps  205: /*
                    206:  * Climb back up the parse tree, validating open scopes.  Mostly calls
                    207:  * through to macro_end in macro.c.
                    208:  */
1.1       kristaps  209: int
1.72      kristaps  210: mdoc_endparse(struct mdoc *m)
1.20      kristaps  211: {
                    212:
1.72      kristaps  213:        if (MDOC_HALT & m->flags)
1.20      kristaps  214:                return(0);
1.72      kristaps  215:        else if (mdoc_macroend(m))
1.20      kristaps  216:                return(1);
1.72      kristaps  217:        m->flags |= MDOC_HALT;
                    218:        return(0);
1.20      kristaps  219: }
                    220:
                    221:
1.50      kristaps  222: /*
1.53      kristaps  223:  * Main parse routine.  Parses a single line -- really just hands off to
                    224:  * the macro or text parser.
1.50      kristaps  225:  */
1.20      kristaps  226: int
1.53      kristaps  227: mdoc_parseln(struct mdoc *m, int ln, char *buf)
1.1       kristaps  228: {
                    229:
1.53      kristaps  230:        if (MDOC_HALT & m->flags)
1.20      kristaps  231:                return(0);
1.50      kristaps  232:
1.53      kristaps  233:        return('.' == *buf ? parsemacro(m, ln, buf) :
                    234:                        parsetext(m, ln, buf));
1.1       kristaps  235: }
                    236:
                    237:
                    238: int
1.31      kristaps  239: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
                    240:                const char *fmt, ...)
1.1       kristaps  241: {
1.31      kristaps  242:        char             buf[256];
                    243:        va_list          ap;
1.1       kristaps  244:
                    245:        if (NULL == mdoc->cb.mdoc_err)
                    246:                return(0);
1.31      kristaps  247:
                    248:        va_start(ap, fmt);
                    249:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    250:        va_end(ap);
                    251:        return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
1.1       kristaps  252: }
                    253:
                    254:
                    255: int
1.31      kristaps  256: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos,
                    257:                enum mdoc_warn type, const char *fmt, ...)
1.1       kristaps  258: {
1.31      kristaps  259:        char             buf[256];
                    260:        va_list          ap;
1.1       kristaps  261:
                    262:        if (NULL == mdoc->cb.mdoc_warn)
                    263:                return(0);
1.31      kristaps  264:
                    265:        va_start(ap, fmt);
                    266:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    267:        va_end(ap);
                    268:        return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, type, buf));
1.1       kristaps  269: }
                    270:
                    271:
                    272: int
1.84    ! kristaps  273: mdoc_nerr(struct mdoc *mdoc, const struct mdoc_node *node,
        !           274:                const char *fmt, ...)
1.78      kristaps  275: {
                    276:        char             buf[256];
                    277:        va_list          ap;
                    278:
                    279:        if (NULL == mdoc->cb.mdoc_err)
                    280:                return(0);
                    281:
                    282:        va_start(ap, fmt);
                    283:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    284:        va_end(ap);
1.84    ! kristaps  285:        return((*mdoc->cb.mdoc_err)(mdoc->data,
        !           286:                                node->line, node->pos, buf));
1.78      kristaps  287: }
                    288:
                    289:
                    290: int
1.84    ! kristaps  291: mdoc_warn(struct mdoc *mdoc, enum mdoc_warn type,
        !           292:                const char *fmt, ...)
1.78      kristaps  293: {
                    294:        char             buf[256];
                    295:        va_list          ap;
                    296:
                    297:        if (NULL == mdoc->cb.mdoc_warn)
                    298:                return(0);
                    299:
                    300:        va_start(ap, fmt);
                    301:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    302:        va_end(ap);
                    303:        return((*mdoc->cb.mdoc_warn)(mdoc->data, mdoc->last->line,
1.84    ! kristaps  304:                                mdoc->last->pos, type, buf));
1.78      kristaps  305: }
                    306:
                    307:
                    308: int
                    309: mdoc_err(struct mdoc *mdoc, const char *fmt, ...)
                    310: {
                    311:        char             buf[256];
                    312:        va_list          ap;
                    313:
                    314:        if (NULL == mdoc->cb.mdoc_err)
                    315:                return(0);
                    316:
                    317:        va_start(ap, fmt);
                    318:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    319:        va_end(ap);
                    320:        return((*mdoc->cb.mdoc_err)(mdoc->data, mdoc->last->line,
1.84    ! kristaps  321:                                mdoc->last->pos, buf));
1.78      kristaps  322: }
                    323:
                    324:
                    325: int
                    326: mdoc_pwarn(struct mdoc *mdoc, int line, int pos, enum mdoc_warn type,
                    327:                const char *fmt, ...)
                    328: {
                    329:        char             buf[256];
                    330:        va_list          ap;
                    331:
                    332:        if (NULL == mdoc->cb.mdoc_warn)
                    333:                return(0);
                    334:
                    335:        va_start(ap, fmt);
                    336:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    337:        va_end(ap);
1.84    ! kristaps  338:        return((*mdoc->cb.mdoc_warn)(mdoc->data,
        !           339:                                line, pos, type, buf));
1.78      kristaps  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)))) {
1.84    ! kristaps  483:                (void)perr(mdoc, (mdoc)->last->line,
        !           484:                                (mdoc)->last->pos, EMALLOC);
1.73      kristaps  485:                return(NULL);
                    486:        }
                    487:
1.46      kristaps  488:        p->sec = mdoc->lastsec;
1.73      kristaps  489:        p->line = line;
                    490:        p->pos = pos;
                    491:        p->tok = tok;
                    492:        if (MDOC_TEXT != (p->type = type))
                    493:                assert(p->tok >= 0);
1.45      kristaps  494:
1.46      kristaps  495:        return(p);
1.45      kristaps  496: }
                    497:
                    498:
1.23      kristaps  499: int
1.22      kristaps  500: mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.17      kristaps  501: {
                    502:        struct mdoc_node *p;
                    503:
1.73      kristaps  504:        p = node_alloc(mdoc, line, pos, tok, MDOC_TAIL);
                    505:        if (NULL == p)
                    506:                return(0);
                    507:        return(node_append(mdoc, p));
1.17      kristaps  508: }
                    509:
                    510:
1.23      kristaps  511: int
1.22      kristaps  512: mdoc_head_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  513: {
                    514:        struct mdoc_node *p;
                    515:
                    516:        assert(mdoc->first);
                    517:        assert(mdoc->last);
                    518:
1.73      kristaps  519:        p = node_alloc(mdoc, line, pos, tok, MDOC_HEAD);
                    520:        if (NULL == p)
                    521:                return(0);
                    522:        return(node_append(mdoc, p));
1.1       kristaps  523: }
                    524:
                    525:
1.23      kristaps  526: int
1.22      kristaps  527: mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  528: {
                    529:        struct mdoc_node *p;
                    530:
1.73      kristaps  531:        p = node_alloc(mdoc, line, pos, tok, MDOC_BODY);
                    532:        if (NULL == p)
                    533:                return(0);
                    534:        return(node_append(mdoc, p));
1.1       kristaps  535: }
                    536:
                    537:
1.23      kristaps  538: int
1.22      kristaps  539: mdoc_block_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  540:                int tok, struct mdoc_arg *args)
1.1       kristaps  541: {
                    542:        struct mdoc_node *p;
                    543:
1.73      kristaps  544:        p = node_alloc(mdoc, line, pos, tok, MDOC_BLOCK);
                    545:        if (NULL == p)
                    546:                return(0);
1.77      kristaps  547:        p->args = args;
                    548:        if (p->args)
1.53      kristaps  549:                (args->refcnt)++;
1.73      kristaps  550:        return(node_append(mdoc, p));
1.1       kristaps  551: }
                    552:
                    553:
1.23      kristaps  554: int
1.22      kristaps  555: mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  556:                int tok, struct mdoc_arg *args)
1.1       kristaps  557: {
                    558:        struct mdoc_node *p;
                    559:
1.73      kristaps  560:        p = node_alloc(mdoc, line, pos, tok, MDOC_ELEM);
                    561:        if (NULL == p)
                    562:                return(0);
1.77      kristaps  563:        p->args = args;
                    564:        if (p->args)
1.53      kristaps  565:                (args->refcnt)++;
1.73      kristaps  566:        return(node_append(mdoc, p));
1.1       kristaps  567: }
                    568:
                    569:
1.23      kristaps  570: int
1.22      kristaps  571: mdoc_word_alloc(struct mdoc *mdoc,
                    572:                int line, int pos, const char *word)
1.1       kristaps  573: {
                    574:        struct mdoc_node *p;
                    575:
1.73      kristaps  576:        p = node_alloc(mdoc, line, pos, -1, MDOC_TEXT);
                    577:        if (NULL == p)
                    578:                return(0);
                    579:        if (NULL == (p->string = strdup(word))) {
1.84    ! kristaps  580:                (void)perr(mdoc, (mdoc)->last->line,
        !           581:                                (mdoc)->last->pos, EMALLOC);
1.73      kristaps  582:                return(0);
                    583:        }
                    584:        return(node_append(mdoc, p));
1.1       kristaps  585: }
                    586:
                    587:
1.53      kristaps  588: void
                    589: mdoc_node_free(struct mdoc_node *p)
1.1       kristaps  590: {
                    591:
1.53      kristaps  592:        if (p->string)
                    593:                free(p->string);
                    594:        if (p->args)
                    595:                mdoc_argv_free(p->args);
1.1       kristaps  596:        free(p);
                    597: }
                    598:
                    599:
1.53      kristaps  600: void
                    601: mdoc_node_freelist(struct mdoc_node *p)
1.1       kristaps  602: {
                    603:
1.53      kristaps  604:        if (p->child)
                    605:                mdoc_node_freelist(p->child);
                    606:        if (p->next)
                    607:                mdoc_node_freelist(p->next);
1.1       kristaps  608:
1.53      kristaps  609:        mdoc_node_free(p);
1.1       kristaps  610: }
                    611:
                    612:
1.53      kristaps  613: /*
                    614:  * Parse free-form text, that is, a line that does not begin with the
                    615:  * control character.
                    616:  */
                    617: static int
1.68      kristaps  618: parsetext(struct mdoc *m, int line, char *buf)
1.1       kristaps  619: {
                    620:
1.68      kristaps  621:        if (SEC_PROLOGUE == m->lastnamed)
1.73      kristaps  622:                return(perr(m, line, 0, ETEXTPROL));
1.1       kristaps  623:
1.68      kristaps  624:        if (0 == buf[0] && ! (MDOC_LITERAL & m->flags))
1.73      kristaps  625:                return(perr(m, line, 0, ENOBLANK));
1.68      kristaps  626:
                    627:        if ( ! mdoc_word_alloc(m, line, 0, buf))
1.53      kristaps  628:                return(0);
1.1       kristaps  629:
1.68      kristaps  630:        m->next = MDOC_NEXT_SIBLING;
1.53      kristaps  631:        return(1);
1.1       kristaps  632: }
                    633:
                    634:
1.58      kristaps  635: static int
                    636: macrowarn(struct mdoc *m, int ln, const char *buf)
                    637: {
                    638:        if ( ! (MDOC_IGN_MACRO & m->pflags))
1.73      kristaps  639:                return(mdoc_perr(m, ln, 1,
                    640:                                "unknown macro: %s%s",
1.59      kristaps  641:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  642:        return(mdoc_pwarn(m, ln, 1, WARN_SYNTAX,
                    643:                                "unknown macro: %s%s",
1.59      kristaps  644:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  645: }
                    646:
                    647:
1.53      kristaps  648: /*
                    649:  * Parse a macro line, that is, a line beginning with the control
                    650:  * character.
                    651:  */
                    652: int
                    653: parsemacro(struct mdoc *m, int ln, char *buf)
1.1       kristaps  654: {
1.53      kristaps  655:        int               i, c;
                    656:        char              mac[5];
1.1       kristaps  657:
1.81      kristaps  658:        /* Empty lines are ignored. */
1.63      kristaps  659:
                    660:        if (0 == buf[1])
                    661:                return(1);
                    662:
1.65      kristaps  663:        if (' ' == buf[1]) {
1.63      kristaps  664:                i = 2;
1.65      kristaps  665:                while (buf[i] && ' ' == buf[i])
1.63      kristaps  666:                        i++;
                    667:                if (0 == buf[i])
                    668:                        return(1);
1.73      kristaps  669:                return(perr(m, ln, 1, ESPACE));
1.63      kristaps  670:        }
1.1       kristaps  671:
1.53      kristaps  672:        /* Copy the first word into a nil-terminated buffer. */
1.1       kristaps  673:
1.53      kristaps  674:        for (i = 1; i < 5; i++) {
                    675:                if (0 == (mac[i - 1] = buf[i]))
                    676:                        break;
1.65      kristaps  677:                else if (' ' == buf[i])
1.53      kristaps  678:                        break;
                    679:        }
1.1       kristaps  680:
1.53      kristaps  681:        mac[i - 1] = 0;
1.1       kristaps  682:
1.53      kristaps  683:        if (i == 5 || i <= 2) {
1.58      kristaps  684:                if ( ! macrowarn(m, ln, mac))
                    685:                        goto err;
                    686:                return(1);
1.53      kristaps  687:        }
                    688:
1.74      kristaps  689:        if (MDOC_MAX == (c = mdoc_hash_find(m->htab, mac))) {
1.58      kristaps  690:                if ( ! macrowarn(m, ln, mac))
                    691:                        goto err;
                    692:                return(1);
1.53      kristaps  693:        }
1.1       kristaps  694:
1.53      kristaps  695:        /* The macro is sane.  Jump to the next word. */
1.1       kristaps  696:
1.65      kristaps  697:        while (buf[i] && ' ' == buf[i])
1.53      kristaps  698:                i++;
1.1       kristaps  699:
1.53      kristaps  700:        /* Begin recursive parse sequence. */
1.1       kristaps  701:
1.53      kristaps  702:        if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
                    703:                goto err;
1.1       kristaps  704:
1.53      kristaps  705:        return(1);
1.1       kristaps  706:
1.53      kristaps  707: err:   /* Error out. */
1.1       kristaps  708:
1.53      kristaps  709:        m->flags |= MDOC_HALT;
                    710:        return(0);
1.1       kristaps  711: }

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