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Annotation of mandoc/mdoc.c, Revision 1.86

1.86    ! kristaps    1: /*     $Id: mdoc.c,v 1.85 2009/06/17 10:53:32 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:
1.85      kristaps  116: /*
                    117:  * Frees volatile resources (parse tree, meta-data, fields).
                    118:  */
1.73      kristaps  119: static void
                    120: mdoc_free1(struct mdoc *mdoc)
1.67      kristaps  121: {
                    122:
                    123:        if (mdoc->first)
                    124:                mdoc_node_freelist(mdoc->first);
                    125:        if (mdoc->meta.title)
                    126:                free(mdoc->meta.title);
                    127:        if (mdoc->meta.os)
                    128:                free(mdoc->meta.os);
                    129:        if (mdoc->meta.name)
                    130:                free(mdoc->meta.name);
                    131:        if (mdoc->meta.arch)
                    132:                free(mdoc->meta.arch);
                    133:        if (mdoc->meta.vol)
                    134:                free(mdoc->meta.vol);
1.73      kristaps  135: }
                    136:
                    137:
1.85      kristaps  138: /*
                    139:  * Allocate all volatile resources (parse tree, meta-data, fields).
                    140:  */
1.73      kristaps  141: static int
                    142: mdoc_alloc1(struct mdoc *mdoc)
                    143: {
1.67      kristaps  144:
                    145:        bzero(&mdoc->meta, sizeof(struct mdoc_meta));
                    146:        mdoc->flags = 0;
1.85      kristaps  147:        mdoc->lastnamed = mdoc->lastsec = SEC_NONE;
1.70      kristaps  148:        mdoc->last = calloc(1, sizeof(struct mdoc_node));
                    149:        if (NULL == mdoc->last)
1.73      kristaps  150:                return(0);
                    151:
1.70      kristaps  152:        mdoc->first = mdoc->last;
1.67      kristaps  153:        mdoc->last->type = MDOC_ROOT;
                    154:        mdoc->next = MDOC_NEXT_CHILD;
1.73      kristaps  155:        return(1);
                    156: }
                    157:
                    158:
                    159: /*
1.85      kristaps  160:  * Free up volatile resources (see mdoc_free1()) then re-initialises the
                    161:  * data with mdoc_alloc1().  After invocation, parse data has been reset
                    162:  * and the parser is ready for re-invocation on a new tree; however,
                    163:  * cross-parse non-volatile data is kept intact.
1.73      kristaps  164:  */
                    165: int
                    166: mdoc_reset(struct mdoc *mdoc)
                    167: {
                    168:
                    169:        mdoc_free1(mdoc);
                    170:        return(mdoc_alloc1(mdoc));
1.67      kristaps  171: }
                    172:
                    173:
1.68      kristaps  174: /*
1.85      kristaps  175:  * Completely free up all volatile and non-volatile parse resources.
                    176:  * After invocation, the pointer is no longer usable.
1.68      kristaps  177:  */
1.67      kristaps  178: void
1.38      kristaps  179: mdoc_free(struct mdoc *mdoc)
1.34      kristaps  180: {
                    181:
1.73      kristaps  182:        mdoc_free1(mdoc);
1.68      kristaps  183:        if (mdoc->htab)
1.74      kristaps  184:                mdoc_hash_free(mdoc->htab);
1.1       kristaps  185:        free(mdoc);
                    186: }
                    187:
                    188:
1.85      kristaps  189: /*
                    190:  * Allocate volatile and non-volatile parse resources.
                    191:  */
1.1       kristaps  192: struct mdoc *
1.55      kristaps  193: mdoc_alloc(void *data, int pflags, const struct mdoc_cb *cb)
1.1       kristaps  194: {
                    195:        struct mdoc     *p;
                    196:
1.70      kristaps  197:        if (NULL == (p = calloc(1, sizeof(struct mdoc))))
1.73      kristaps  198:                return(NULL);
1.74      kristaps  199:        if (cb)
                    200:                (void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
1.1       kristaps  201:
                    202:        p->data = data;
1.73      kristaps  203:        p->pflags = pflags;
                    204:
1.74      kristaps  205:        if (NULL == (p->htab = mdoc_hash_alloc())) {
                    206:                free(p);
                    207:                return(NULL);
                    208:        } else if (mdoc_alloc1(p))
                    209:                return(p);
1.1       kristaps  210:
1.73      kristaps  211:        free(p);
                    212:        return(NULL);
1.1       kristaps  213: }
                    214:
                    215:
1.68      kristaps  216: /*
                    217:  * Climb back up the parse tree, validating open scopes.  Mostly calls
1.85      kristaps  218:  * through to macro_end() in macro.c.
1.68      kristaps  219:  */
1.1       kristaps  220: int
1.72      kristaps  221: mdoc_endparse(struct mdoc *m)
1.20      kristaps  222: {
                    223:
1.72      kristaps  224:        if (MDOC_HALT & m->flags)
1.20      kristaps  225:                return(0);
1.72      kristaps  226:        else if (mdoc_macroend(m))
1.20      kristaps  227:                return(1);
1.72      kristaps  228:        m->flags |= MDOC_HALT;
                    229:        return(0);
1.20      kristaps  230: }
                    231:
                    232:
1.50      kristaps  233: /*
1.53      kristaps  234:  * Main parse routine.  Parses a single line -- really just hands off to
1.85      kristaps  235:  * the macro (parsemacro()) or text parser (parsetext()).
1.50      kristaps  236:  */
1.20      kristaps  237: int
1.53      kristaps  238: mdoc_parseln(struct mdoc *m, int ln, char *buf)
1.1       kristaps  239: {
                    240:
1.53      kristaps  241:        if (MDOC_HALT & m->flags)
1.20      kristaps  242:                return(0);
1.50      kristaps  243:
1.53      kristaps  244:        return('.' == *buf ? parsemacro(m, ln, buf) :
                    245:                        parsetext(m, ln, buf));
1.1       kristaps  246: }
                    247:
                    248:
                    249: int
1.31      kristaps  250: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
                    251:                const char *fmt, ...)
1.1       kristaps  252: {
1.31      kristaps  253:        char             buf[256];
                    254:        va_list          ap;
1.1       kristaps  255:
                    256:        if (NULL == mdoc->cb.mdoc_err)
                    257:                return(0);
1.31      kristaps  258:
                    259:        va_start(ap, fmt);
                    260:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    261:        va_end(ap);
                    262:        return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
1.1       kristaps  263: }
                    264:
                    265:
                    266: int
1.31      kristaps  267: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos,
                    268:                enum mdoc_warn type, const char *fmt, ...)
1.1       kristaps  269: {
1.31      kristaps  270:        char             buf[256];
                    271:        va_list          ap;
1.1       kristaps  272:
                    273:        if (NULL == mdoc->cb.mdoc_warn)
                    274:                return(0);
1.31      kristaps  275:
                    276:        va_start(ap, fmt);
                    277:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    278:        va_end(ap);
                    279:        return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, type, buf));
1.1       kristaps  280: }
                    281:
                    282:
                    283: int
1.84      kristaps  284: mdoc_nerr(struct mdoc *mdoc, const struct mdoc_node *node,
                    285:                const char *fmt, ...)
1.78      kristaps  286: {
                    287:        char             buf[256];
                    288:        va_list          ap;
                    289:
                    290:        if (NULL == mdoc->cb.mdoc_err)
                    291:                return(0);
                    292:
                    293:        va_start(ap, fmt);
                    294:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    295:        va_end(ap);
1.84      kristaps  296:        return((*mdoc->cb.mdoc_err)(mdoc->data,
                    297:                                node->line, node->pos, buf));
1.78      kristaps  298: }
                    299:
                    300:
                    301: int
1.84      kristaps  302: mdoc_warn(struct mdoc *mdoc, enum mdoc_warn type,
                    303:                const char *fmt, ...)
1.78      kristaps  304: {
                    305:        char             buf[256];
                    306:        va_list          ap;
                    307:
                    308:        if (NULL == mdoc->cb.mdoc_warn)
                    309:                return(0);
                    310:
                    311:        va_start(ap, fmt);
                    312:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    313:        va_end(ap);
                    314:        return((*mdoc->cb.mdoc_warn)(mdoc->data, mdoc->last->line,
1.84      kristaps  315:                                mdoc->last->pos, type, buf));
1.78      kristaps  316: }
                    317:
                    318:
                    319: int
                    320: mdoc_err(struct mdoc *mdoc, const char *fmt, ...)
                    321: {
                    322:        char             buf[256];
                    323:        va_list          ap;
                    324:
                    325:        if (NULL == mdoc->cb.mdoc_err)
                    326:                return(0);
                    327:
                    328:        va_start(ap, fmt);
                    329:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    330:        va_end(ap);
                    331:        return((*mdoc->cb.mdoc_err)(mdoc->data, mdoc->last->line,
1.84      kristaps  332:                                mdoc->last->pos, buf));
1.78      kristaps  333: }
                    334:
                    335:
                    336: int
                    337: mdoc_pwarn(struct mdoc *mdoc, int line, int pos, enum mdoc_warn type,
                    338:                const char *fmt, ...)
                    339: {
                    340:        char             buf[256];
                    341:        va_list          ap;
                    342:
                    343:        if (NULL == mdoc->cb.mdoc_warn)
                    344:                return(0);
                    345:
                    346:        va_start(ap, fmt);
                    347:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    348:        va_end(ap);
1.84      kristaps  349:        return((*mdoc->cb.mdoc_warn)(mdoc->data,
                    350:                                line, pos, type, buf));
1.78      kristaps  351: }
                    352:
                    353: int
                    354: mdoc_perr(struct mdoc *mdoc, int line, int pos, const char *fmt, ...)
                    355: {
                    356:        char             buf[256];
                    357:        va_list          ap;
                    358:
                    359:        if (NULL == mdoc->cb.mdoc_err)
                    360:                return(0);
                    361:
                    362:        va_start(ap, fmt);
                    363:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    364:        va_end(ap);
                    365:        return((*mdoc->cb.mdoc_err)(mdoc->data, line, pos, buf));
                    366: }
                    367:
                    368:
                    369: int
1.53      kristaps  370: mdoc_macro(struct mdoc *m, int tok,
                    371:                int ln, int pp, int *pos, char *buf)
1.1       kristaps  372: {
                    373:
1.44      kristaps  374:        if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
1.85      kristaps  375:                        MDOC_PBODY & m->flags)
1.73      kristaps  376:                return(perr(m, ln, pp, EPROLBODY));
1.44      kristaps  377:        if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
1.85      kristaps  378:                        ! (MDOC_PBODY & m->flags))
1.73      kristaps  379:                return(perr(m, ln, pp, EBODYPROL));
1.53      kristaps  380:
                    381:        if (1 != pp && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
1.73      kristaps  382:                return(perr(m, ln, pp, ENOCALL));
1.53      kristaps  383:
                    384:        return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
1.1       kristaps  385: }
                    386:
                    387:
1.23      kristaps  388: static int
1.73      kristaps  389: perr(struct mdoc *m, int line, int pos, enum merr type)
                    390: {
                    391:        char            *p;
                    392:
                    393:        p = NULL;
                    394:        switch (type) {
                    395:        case (ENOCALL):
                    396:                p = "not callable";
                    397:                break;
                    398:        case (EPROLBODY):
                    399:                p = "macro disallowed in document body";
                    400:                break;
                    401:        case (EBODYPROL):
                    402:                p = "macro disallowed in document prologue";
                    403:                break;
                    404:        case (EMALLOC):
                    405:                p = "memory exhausted";
                    406:                break;
                    407:        case (ETEXTPROL):
                    408:                p = "text disallowed in document prologue";
                    409:                break;
                    410:        case (ENOBLANK):
                    411:                p = "blank lines disallowed in non-literal contexts";
                    412:                break;
                    413:        case (ESPACE):
                    414:                p = "whitespace disallowed after delimiter";
                    415:                break;
                    416:        }
                    417:        assert(p);
                    418:        return(mdoc_perr(m, line, pos, p));
                    419: }
                    420:
                    421:
                    422: static int
                    423: node_append(struct mdoc *mdoc, struct mdoc_node *p)
1.1       kristaps  424: {
                    425:
1.25      kristaps  426:        assert(mdoc->last);
                    427:        assert(mdoc->first);
                    428:        assert(MDOC_ROOT != p->type);
1.1       kristaps  429:
1.13      kristaps  430:        switch (mdoc->next) {
                    431:        case (MDOC_NEXT_SIBLING):
1.6       kristaps  432:                mdoc->last->next = p;
                    433:                p->prev = mdoc->last;
1.13      kristaps  434:                p->parent = mdoc->last->parent;
1.1       kristaps  435:                break;
1.13      kristaps  436:        case (MDOC_NEXT_CHILD):
                    437:                mdoc->last->child = p;
1.1       kristaps  438:                p->parent = mdoc->last;
                    439:                break;
                    440:        default:
1.13      kristaps  441:                abort();
                    442:                /* NOTREACHED */
1.1       kristaps  443:        }
                    444:
1.86    ! kristaps  445:        p->parent->nchild++;
        !           446:
1.23      kristaps  447:        if ( ! mdoc_valid_pre(mdoc, p))
                    448:                return(0);
1.68      kristaps  449:        if ( ! mdoc_action_pre(mdoc, p))
                    450:                return(0);
1.27      kristaps  451:
                    452:        switch (p->type) {
                    453:        case (MDOC_HEAD):
                    454:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  455:                p->parent->head = p;
1.27      kristaps  456:                break;
                    457:        case (MDOC_TAIL):
                    458:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  459:                p->parent->tail = p;
1.27      kristaps  460:                break;
                    461:        case (MDOC_BODY):
                    462:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  463:                p->parent->body = p;
1.27      kristaps  464:                break;
                    465:        default:
                    466:                break;
                    467:        }
                    468:
1.1       kristaps  469:        mdoc->last = p;
1.71      kristaps  470:
                    471:        switch (p->type) {
                    472:        case (MDOC_TEXT):
                    473:                if ( ! mdoc_valid_post(mdoc))
                    474:                        return(0);
                    475:                if ( ! mdoc_action_post(mdoc))
                    476:                        return(0);
                    477:                break;
                    478:        default:
                    479:                break;
                    480:        }
                    481:
1.23      kristaps  482:        return(1);
1.1       kristaps  483: }
                    484:
                    485:
1.45      kristaps  486: static struct mdoc_node *
1.73      kristaps  487: node_alloc(struct mdoc *mdoc, int line,
                    488:                int pos, int tok, enum mdoc_type type)
1.45      kristaps  489: {
1.46      kristaps  490:        struct mdoc_node *p;
                    491:
1.73      kristaps  492:        if (NULL == (p = calloc(1, sizeof(struct mdoc_node)))) {
1.84      kristaps  493:                (void)perr(mdoc, (mdoc)->last->line,
                    494:                                (mdoc)->last->pos, EMALLOC);
1.73      kristaps  495:                return(NULL);
                    496:        }
                    497:
1.46      kristaps  498:        p->sec = mdoc->lastsec;
1.73      kristaps  499:        p->line = line;
                    500:        p->pos = pos;
                    501:        p->tok = tok;
                    502:        if (MDOC_TEXT != (p->type = type))
                    503:                assert(p->tok >= 0);
1.45      kristaps  504:
1.46      kristaps  505:        return(p);
1.45      kristaps  506: }
                    507:
                    508:
1.23      kristaps  509: int
1.22      kristaps  510: mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.17      kristaps  511: {
                    512:        struct mdoc_node *p;
                    513:
1.73      kristaps  514:        p = node_alloc(mdoc, line, pos, tok, MDOC_TAIL);
                    515:        if (NULL == p)
                    516:                return(0);
                    517:        return(node_append(mdoc, p));
1.17      kristaps  518: }
                    519:
                    520:
1.23      kristaps  521: int
1.22      kristaps  522: mdoc_head_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  523: {
                    524:        struct mdoc_node *p;
                    525:
                    526:        assert(mdoc->first);
                    527:        assert(mdoc->last);
                    528:
1.73      kristaps  529:        p = node_alloc(mdoc, line, pos, tok, MDOC_HEAD);
                    530:        if (NULL == p)
                    531:                return(0);
                    532:        return(node_append(mdoc, p));
1.1       kristaps  533: }
                    534:
                    535:
1.23      kristaps  536: int
1.22      kristaps  537: mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, int tok)
1.1       kristaps  538: {
                    539:        struct mdoc_node *p;
                    540:
1.73      kristaps  541:        p = node_alloc(mdoc, line, pos, tok, MDOC_BODY);
                    542:        if (NULL == p)
                    543:                return(0);
                    544:        return(node_append(mdoc, p));
1.1       kristaps  545: }
                    546:
                    547:
1.23      kristaps  548: int
1.22      kristaps  549: mdoc_block_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  550:                int tok, struct mdoc_arg *args)
1.1       kristaps  551: {
                    552:        struct mdoc_node *p;
                    553:
1.73      kristaps  554:        p = node_alloc(mdoc, line, pos, tok, MDOC_BLOCK);
                    555:        if (NULL == p)
                    556:                return(0);
1.77      kristaps  557:        p->args = args;
                    558:        if (p->args)
1.53      kristaps  559:                (args->refcnt)++;
1.73      kristaps  560:        return(node_append(mdoc, p));
1.1       kristaps  561: }
                    562:
                    563:
1.23      kristaps  564: int
1.22      kristaps  565: mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos,
1.53      kristaps  566:                int tok, struct mdoc_arg *args)
1.1       kristaps  567: {
                    568:        struct mdoc_node *p;
                    569:
1.73      kristaps  570:        p = node_alloc(mdoc, line, pos, tok, MDOC_ELEM);
                    571:        if (NULL == p)
                    572:                return(0);
1.77      kristaps  573:        p->args = args;
                    574:        if (p->args)
1.53      kristaps  575:                (args->refcnt)++;
1.73      kristaps  576:        return(node_append(mdoc, p));
1.1       kristaps  577: }
                    578:
                    579:
1.23      kristaps  580: int
1.22      kristaps  581: mdoc_word_alloc(struct mdoc *mdoc,
                    582:                int line, int pos, const char *word)
1.1       kristaps  583: {
                    584:        struct mdoc_node *p;
                    585:
1.73      kristaps  586:        p = node_alloc(mdoc, line, pos, -1, MDOC_TEXT);
                    587:        if (NULL == p)
                    588:                return(0);
                    589:        if (NULL == (p->string = strdup(word))) {
1.84      kristaps  590:                (void)perr(mdoc, (mdoc)->last->line,
                    591:                                (mdoc)->last->pos, EMALLOC);
1.73      kristaps  592:                return(0);
                    593:        }
                    594:        return(node_append(mdoc, p));
1.1       kristaps  595: }
                    596:
                    597:
1.53      kristaps  598: void
                    599: mdoc_node_free(struct mdoc_node *p)
1.1       kristaps  600: {
                    601:
1.86    ! kristaps  602:        if (p->parent)
        !           603:                p->parent->nchild--;
1.53      kristaps  604:        if (p->string)
                    605:                free(p->string);
                    606:        if (p->args)
                    607:                mdoc_argv_free(p->args);
1.1       kristaps  608:        free(p);
                    609: }
                    610:
                    611:
1.53      kristaps  612: void
                    613: mdoc_node_freelist(struct mdoc_node *p)
1.1       kristaps  614: {
                    615:
1.53      kristaps  616:        if (p->child)
                    617:                mdoc_node_freelist(p->child);
                    618:        if (p->next)
                    619:                mdoc_node_freelist(p->next);
1.1       kristaps  620:
1.86    ! kristaps  621:        assert(0 == p->nchild);
1.53      kristaps  622:        mdoc_node_free(p);
1.1       kristaps  623: }
                    624:
                    625:
1.53      kristaps  626: /*
                    627:  * Parse free-form text, that is, a line that does not begin with the
                    628:  * control character.
                    629:  */
                    630: static int
1.68      kristaps  631: parsetext(struct mdoc *m, int line, char *buf)
1.1       kristaps  632: {
                    633:
1.85      kristaps  634:        if (SEC_NONE == m->lastnamed)
1.73      kristaps  635:                return(perr(m, line, 0, ETEXTPROL));
1.1       kristaps  636:
1.68      kristaps  637:        if (0 == buf[0] && ! (MDOC_LITERAL & m->flags))
1.73      kristaps  638:                return(perr(m, line, 0, ENOBLANK));
1.68      kristaps  639:
                    640:        if ( ! mdoc_word_alloc(m, line, 0, buf))
1.53      kristaps  641:                return(0);
1.1       kristaps  642:
1.68      kristaps  643:        m->next = MDOC_NEXT_SIBLING;
1.53      kristaps  644:        return(1);
1.1       kristaps  645: }
                    646:
                    647:
1.58      kristaps  648: static int
                    649: macrowarn(struct mdoc *m, int ln, const char *buf)
                    650: {
                    651:        if ( ! (MDOC_IGN_MACRO & m->pflags))
1.73      kristaps  652:                return(mdoc_perr(m, ln, 1,
                    653:                                "unknown macro: %s%s",
1.59      kristaps  654:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  655:        return(mdoc_pwarn(m, ln, 1, WARN_SYNTAX,
                    656:                                "unknown macro: %s%s",
1.59      kristaps  657:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  658: }
                    659:
                    660:
1.53      kristaps  661: /*
                    662:  * Parse a macro line, that is, a line beginning with the control
                    663:  * character.
                    664:  */
                    665: int
                    666: parsemacro(struct mdoc *m, int ln, char *buf)
1.1       kristaps  667: {
1.53      kristaps  668:        int               i, c;
                    669:        char              mac[5];
1.1       kristaps  670:
1.81      kristaps  671:        /* Empty lines are ignored. */
1.63      kristaps  672:
                    673:        if (0 == buf[1])
                    674:                return(1);
                    675:
1.65      kristaps  676:        if (' ' == buf[1]) {
1.63      kristaps  677:                i = 2;
1.65      kristaps  678:                while (buf[i] && ' ' == buf[i])
1.63      kristaps  679:                        i++;
                    680:                if (0 == buf[i])
                    681:                        return(1);
1.73      kristaps  682:                return(perr(m, ln, 1, ESPACE));
1.63      kristaps  683:        }
1.1       kristaps  684:
1.53      kristaps  685:        /* Copy the first word into a nil-terminated buffer. */
1.1       kristaps  686:
1.53      kristaps  687:        for (i = 1; i < 5; i++) {
                    688:                if (0 == (mac[i - 1] = buf[i]))
                    689:                        break;
1.65      kristaps  690:                else if (' ' == buf[i])
1.53      kristaps  691:                        break;
                    692:        }
1.1       kristaps  693:
1.53      kristaps  694:        mac[i - 1] = 0;
1.1       kristaps  695:
1.53      kristaps  696:        if (i == 5 || i <= 2) {
1.58      kristaps  697:                if ( ! macrowarn(m, ln, mac))
                    698:                        goto err;
                    699:                return(1);
1.53      kristaps  700:        }
                    701:
1.74      kristaps  702:        if (MDOC_MAX == (c = mdoc_hash_find(m->htab, mac))) {
1.58      kristaps  703:                if ( ! macrowarn(m, ln, mac))
                    704:                        goto err;
                    705:                return(1);
1.53      kristaps  706:        }
1.1       kristaps  707:
1.53      kristaps  708:        /* The macro is sane.  Jump to the next word. */
1.1       kristaps  709:
1.65      kristaps  710:        while (buf[i] && ' ' == buf[i])
1.53      kristaps  711:                i++;
1.1       kristaps  712:
1.53      kristaps  713:        /* Begin recursive parse sequence. */
1.1       kristaps  714:
1.53      kristaps  715:        if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
                    716:                goto err;
1.1       kristaps  717:
1.53      kristaps  718:        return(1);
1.1       kristaps  719:
1.53      kristaps  720: err:   /* Error out. */
1.1       kristaps  721:
1.53      kristaps  722:        m->flags |= MDOC_HALT;
                    723:        return(0);
1.1       kristaps  724: }

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