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Annotation of mandoc/mdoc.c, Revision 1.139

1.139   ! kristaps    1: /*     $Id: mdoc.c,v 1.138 2010/05/25 12:37:20 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:  */
1.114     kristaps   17: #ifdef HAVE_CONFIG_H
                     18: #include "config.h"
                     19: #endif
                     20:
1.106     kristaps   21: #include <sys/types.h>
                     22:
1.1       kristaps   23: #include <assert.h>
                     24: #include <ctype.h>
                     25: #include <stdarg.h>
1.73      kristaps   26: #include <stdio.h>
1.1       kristaps   27: #include <stdlib.h>
                     28: #include <string.h>
1.120     kristaps   29: #include <time.h>
1.1       kristaps   30:
1.136     kristaps   31: #include "mandoc.h"
1.70      kristaps   32: #include "libmdoc.h"
1.113     kristaps   33: #include "libmandoc.h"
1.1       kristaps   34:
                     35: const  char *const __mdoc_macronames[MDOC_MAX] = {
1.82      kristaps   36:        "Ap",           "Dd",           "Dt",           "Os",
1.1       kristaps   37:        "Sh",           "Ss",           "Pp",           "D1",
                     38:        "Dl",           "Bd",           "Ed",           "Bl",
                     39:        "El",           "It",           "Ad",           "An",
                     40:        "Ar",           "Cd",           "Cm",           "Dv",
                     41:        "Er",           "Ev",           "Ex",           "Fa",
                     42:        "Fd",           "Fl",           "Fn",           "Ft",
                     43:        "Ic",           "In",           "Li",           "Nd",
                     44:        "Nm",           "Op",           "Ot",           "Pa",
                     45:        "Rv",           "St",           "Va",           "Vt",
                     46:        /* LINTED */
1.114     kristaps   47:        "Xr",           "%A",           "%B",           "%D",
1.1       kristaps   48:        /* LINTED */
1.114     kristaps   49:        "%I",           "%J",           "%N",           "%O",
1.1       kristaps   50:        /* LINTED */
1.114     kristaps   51:        "%P",           "%R",           "%T",           "%V",
1.1       kristaps   52:        "Ac",           "Ao",           "Aq",           "At",
                     53:        "Bc",           "Bf",           "Bo",           "Bq",
                     54:        "Bsx",          "Bx",           "Db",           "Dc",
                     55:        "Do",           "Dq",           "Ec",           "Ef",
                     56:        "Em",           "Eo",           "Fx",           "Ms",
                     57:        "No",           "Ns",           "Nx",           "Ox",
                     58:        "Pc",           "Pf",           "Po",           "Pq",
                     59:        "Qc",           "Ql",           "Qo",           "Qq",
                     60:        "Re",           "Rs",           "Sc",           "So",
                     61:        "Sq",           "Sm",           "Sx",           "Sy",
                     62:        "Tn",           "Ux",           "Xc",           "Xo",
                     63:        "Fo",           "Fc",           "Oo",           "Oc",
                     64:        "Bk",           "Ek",           "Bt",           "Hf",
1.82      kristaps   65:        "Fr",           "Ud",           "Lb",           "Lp",
                     66:        "Lk",           "Mt",           "Brq",          "Bro",
1.64      kristaps   67:        /* LINTED */
1.114     kristaps   68:        "Brc",          "%C",           "Es",           "En",
1.69      kristaps   69:        /* LINTED */
1.114     kristaps   70:        "Dx",           "%Q",           "br",           "sp",
1.110     kristaps   71:        /* LINTED */
1.114     kristaps   72:        "%U"
1.1       kristaps   73:        };
                     74:
                     75: const  char *const __mdoc_argnames[MDOC_ARG_MAX] = {
                     76:        "split",                "nosplit",              "ragged",
                     77:        "unfilled",             "literal",              "file",
                     78:        "offset",               "bullet",               "dash",
                     79:        "hyphen",               "item",                 "enum",
                     80:        "tag",                  "diag",                 "hang",
                     81:        "ohang",                "inset",                "column",
                     82:        "width",                "compact",              "std",
1.52      kristaps   83:        "filled",               "words",                "emphasis",
1.108     kristaps   84:        "symbolic",             "nested",               "centered"
1.1       kristaps   85:        };
                     86:
                     87: const  char * const *mdoc_macronames = __mdoc_macronames;
                     88: const  char * const *mdoc_argnames = __mdoc_argnames;
                     89:
1.121     kristaps   90: static void              mdoc_node_free(struct mdoc_node *);
                     91: static void              mdoc_node_unlink(struct mdoc *,
                     92:                                struct mdoc_node *);
1.73      kristaps   93: static void              mdoc_free1(struct mdoc *);
1.113     kristaps   94: static void              mdoc_alloc1(struct mdoc *);
1.73      kristaps   95: static struct mdoc_node *node_alloc(struct mdoc *, int, int,
1.117     kristaps   96:                                enum mdoct, enum mdoc_type);
1.73      kristaps   97: static int               node_append(struct mdoc *,
1.71      kristaps   98:                                struct mdoc_node *);
1.135     kristaps   99: static int               mdoc_ptext(struct mdoc *, int, char *, int);
                    100: static int               mdoc_pmacro(struct mdoc *, int, char *, int);
                    101: static int               macrowarn(struct mdoc *, int,
                    102:                                const char *, int);
1.124     kristaps  103:
1.88      kristaps  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:
1.85      kristaps  121: /*
                    122:  * Frees volatile resources (parse tree, meta-data, fields).
                    123:  */
1.73      kristaps  124: static void
                    125: mdoc_free1(struct mdoc *mdoc)
1.67      kristaps  126: {
                    127:
                    128:        if (mdoc->first)
1.121     kristaps  129:                mdoc_node_delete(mdoc, mdoc->first);
1.67      kristaps  130:        if (mdoc->meta.title)
                    131:                free(mdoc->meta.title);
                    132:        if (mdoc->meta.os)
                    133:                free(mdoc->meta.os);
                    134:        if (mdoc->meta.name)
                    135:                free(mdoc->meta.name);
                    136:        if (mdoc->meta.arch)
                    137:                free(mdoc->meta.arch);
                    138:        if (mdoc->meta.vol)
                    139:                free(mdoc->meta.vol);
1.133     kristaps  140:        if (mdoc->meta.msec)
                    141:                free(mdoc->meta.msec);
1.73      kristaps  142: }
                    143:
                    144:
1.85      kristaps  145: /*
                    146:  * Allocate all volatile resources (parse tree, meta-data, fields).
                    147:  */
1.113     kristaps  148: static void
1.73      kristaps  149: mdoc_alloc1(struct mdoc *mdoc)
                    150: {
1.67      kristaps  151:
1.112     kristaps  152:        memset(&mdoc->meta, 0, sizeof(struct mdoc_meta));
1.67      kristaps  153:        mdoc->flags = 0;
1.85      kristaps  154:        mdoc->lastnamed = mdoc->lastsec = SEC_NONE;
1.113     kristaps  155:        mdoc->last = mandoc_calloc(1, sizeof(struct mdoc_node));
1.70      kristaps  156:        mdoc->first = mdoc->last;
1.67      kristaps  157:        mdoc->last->type = MDOC_ROOT;
                    158:        mdoc->next = MDOC_NEXT_CHILD;
1.73      kristaps  159: }
                    160:
                    161:
                    162: /*
1.85      kristaps  163:  * Free up volatile resources (see mdoc_free1()) then re-initialises the
                    164:  * data with mdoc_alloc1().  After invocation, parse data has been reset
                    165:  * and the parser is ready for re-invocation on a new tree; however,
                    166:  * cross-parse non-volatile data is kept intact.
1.73      kristaps  167:  */
1.113     kristaps  168: void
1.73      kristaps  169: mdoc_reset(struct mdoc *mdoc)
                    170: {
                    171:
                    172:        mdoc_free1(mdoc);
1.113     kristaps  173:        mdoc_alloc1(mdoc);
1.67      kristaps  174: }
                    175:
                    176:
1.68      kristaps  177: /*
1.85      kristaps  178:  * Completely free up all volatile and non-volatile parse resources.
                    179:  * After invocation, the pointer is no longer usable.
1.68      kristaps  180:  */
1.67      kristaps  181: void
1.38      kristaps  182: mdoc_free(struct mdoc *mdoc)
1.34      kristaps  183: {
                    184:
1.73      kristaps  185:        mdoc_free1(mdoc);
1.1       kristaps  186:        free(mdoc);
                    187: }
                    188:
                    189:
1.85      kristaps  190: /*
                    191:  * Allocate volatile and non-volatile parse resources.
                    192:  */
1.1       kristaps  193: struct mdoc *
1.136     kristaps  194: mdoc_alloc(void *data, int pflags, mandocmsg msg)
1.1       kristaps  195: {
                    196:        struct mdoc     *p;
                    197:
1.113     kristaps  198:        p = mandoc_calloc(1, sizeof(struct mdoc));
                    199:
1.136     kristaps  200:        p->msg = msg;
1.1       kristaps  201:        p->data = data;
1.73      kristaps  202:        p->pflags = pflags;
                    203:
1.113     kristaps  204:        mdoc_hash_init();
                    205:        mdoc_alloc1(p);
                    206:        return(p);
1.1       kristaps  207: }
                    208:
                    209:
1.68      kristaps  210: /*
                    211:  * Climb back up the parse tree, validating open scopes.  Mostly calls
1.85      kristaps  212:  * through to macro_end() in macro.c.
1.68      kristaps  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
1.123     kristaps  229:  * the macro (mdoc_pmacro()) or text parser (mdoc_ptext()).
1.50      kristaps  230:  */
1.20      kristaps  231: int
1.135     kristaps  232: mdoc_parseln(struct mdoc *m, int ln, char *buf, int offs)
1.1       kristaps  233: {
                    234:
1.53      kristaps  235:        if (MDOC_HALT & m->flags)
1.20      kristaps  236:                return(0);
1.50      kristaps  237:
1.130     kristaps  238:        m->flags |= MDOC_NEWLINE;
1.135     kristaps  239:        return(('.' == buf[offs] || '\'' == buf[offs]) ?
                    240:                        mdoc_pmacro(m, ln, buf, offs) :
                    241:                        mdoc_ptext(m, ln, buf, offs));
1.1       kristaps  242: }
                    243:
                    244:
                    245: int
1.136     kristaps  246: mdoc_vmsg(struct mdoc *mdoc, enum mandocerr t,
                    247:                int ln, int pos, const char *fmt, ...)
1.1       kristaps  248: {
1.31      kristaps  249:        char             buf[256];
                    250:        va_list          ap;
1.1       kristaps  251:
1.31      kristaps  252:        va_start(ap, fmt);
1.136     kristaps  253:        vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
1.31      kristaps  254:        va_end(ap);
1.88      kristaps  255:
1.136     kristaps  256:        return((*mdoc->msg)(t, mdoc->data, ln, pos, buf));
1.88      kristaps  257: }
                    258:
                    259:
                    260: int
1.117     kristaps  261: mdoc_macro(struct mdoc *m, enum mdoct tok,
1.88      kristaps  262:                int ln, int pp, int *pos, char *buf)
                    263: {
1.122     kristaps  264:        assert(tok < MDOC_MAX);
                    265:
                    266:        /* If we're in the body, deny prologue calls. */
1.117     kristaps  267:
1.88      kristaps  268:        if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
1.122     kristaps  269:                        MDOC_PBODY & m->flags)
1.136     kristaps  270:                return(mdoc_pmsg(m, ln, pp, MANDOCERR_BADBODY));
1.122     kristaps  271:
                    272:        /* If we're in the prologue, deny "body" macros.  */
                    273:
                    274:        if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
                    275:                        ! (MDOC_PBODY & m->flags)) {
1.136     kristaps  276:                if ( ! mdoc_pmsg(m, ln, pp, MANDOCERR_BADPROLOG))
1.120     kristaps  277:                        return(0);
                    278:                if (NULL == m->meta.title)
                    279:                        m->meta.title = mandoc_strdup("unknown");
                    280:                if (NULL == m->meta.vol)
                    281:                        m->meta.vol = mandoc_strdup("local");
                    282:                if (NULL == m->meta.os)
                    283:                        m->meta.os = mandoc_strdup("local");
                    284:                if (0 == m->meta.date)
                    285:                        m->meta.date = time(NULL);
                    286:                m->flags |= MDOC_PBODY;
                    287:        }
1.88      kristaps  288:
                    289:        return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
1.73      kristaps  290: }
                    291:
                    292:
                    293: static int
                    294: node_append(struct mdoc *mdoc, struct mdoc_node *p)
1.1       kristaps  295: {
                    296:
1.25      kristaps  297:        assert(mdoc->last);
                    298:        assert(mdoc->first);
                    299:        assert(MDOC_ROOT != p->type);
1.1       kristaps  300:
1.13      kristaps  301:        switch (mdoc->next) {
                    302:        case (MDOC_NEXT_SIBLING):
1.6       kristaps  303:                mdoc->last->next = p;
                    304:                p->prev = mdoc->last;
1.13      kristaps  305:                p->parent = mdoc->last->parent;
1.1       kristaps  306:                break;
1.13      kristaps  307:        case (MDOC_NEXT_CHILD):
                    308:                mdoc->last->child = p;
1.1       kristaps  309:                p->parent = mdoc->last;
                    310:                break;
                    311:        default:
1.13      kristaps  312:                abort();
                    313:                /* NOTREACHED */
1.1       kristaps  314:        }
                    315:
1.86      kristaps  316:        p->parent->nchild++;
                    317:
1.23      kristaps  318:        if ( ! mdoc_valid_pre(mdoc, p))
                    319:                return(0);
1.68      kristaps  320:        if ( ! mdoc_action_pre(mdoc, p))
                    321:                return(0);
1.27      kristaps  322:
                    323:        switch (p->type) {
                    324:        case (MDOC_HEAD):
                    325:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  326:                p->parent->head = p;
1.27      kristaps  327:                break;
                    328:        case (MDOC_TAIL):
                    329:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  330:                p->parent->tail = p;
1.27      kristaps  331:                break;
                    332:        case (MDOC_BODY):
                    333:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  334:                p->parent->body = p;
1.27      kristaps  335:                break;
                    336:        default:
                    337:                break;
                    338:        }
                    339:
1.1       kristaps  340:        mdoc->last = p;
1.71      kristaps  341:
                    342:        switch (p->type) {
                    343:        case (MDOC_TEXT):
                    344:                if ( ! mdoc_valid_post(mdoc))
                    345:                        return(0);
                    346:                if ( ! mdoc_action_post(mdoc))
                    347:                        return(0);
                    348:                break;
                    349:        default:
                    350:                break;
                    351:        }
                    352:
1.23      kristaps  353:        return(1);
1.1       kristaps  354: }
                    355:
                    356:
1.45      kristaps  357: static struct mdoc_node *
1.117     kristaps  358: node_alloc(struct mdoc *m, int line, int pos,
                    359:                enum mdoct tok, enum mdoc_type type)
1.45      kristaps  360: {
1.46      kristaps  361:        struct mdoc_node *p;
                    362:
1.113     kristaps  363:        p = mandoc_calloc(1, sizeof(struct mdoc_node));
1.91      kristaps  364:        p->sec = m->lastsec;
1.73      kristaps  365:        p->line = line;
                    366:        p->pos = pos;
                    367:        p->tok = tok;
1.118     kristaps  368:        p->type = type;
1.130     kristaps  369:        if (MDOC_NEWLINE & m->flags)
                    370:                p->flags |= MDOC_LINE;
                    371:        m->flags &= ~MDOC_NEWLINE;
1.46      kristaps  372:        return(p);
1.45      kristaps  373: }
                    374:
                    375:
1.23      kristaps  376: int
1.117     kristaps  377: mdoc_tail_alloc(struct mdoc *m, int line, int pos, enum mdoct tok)
1.17      kristaps  378: {
                    379:        struct mdoc_node *p;
                    380:
1.91      kristaps  381:        p = node_alloc(m, line, pos, tok, MDOC_TAIL);
1.102     kristaps  382:        if ( ! node_append(m, p))
                    383:                return(0);
                    384:        m->next = MDOC_NEXT_CHILD;
                    385:        return(1);
1.17      kristaps  386: }
                    387:
                    388:
1.23      kristaps  389: int
1.117     kristaps  390: mdoc_head_alloc(struct mdoc *m, int line, int pos, enum mdoct tok)
1.1       kristaps  391: {
                    392:        struct mdoc_node *p;
                    393:
1.91      kristaps  394:        assert(m->first);
                    395:        assert(m->last);
1.1       kristaps  396:
1.91      kristaps  397:        p = node_alloc(m, line, pos, tok, MDOC_HEAD);
1.102     kristaps  398:        if ( ! node_append(m, p))
                    399:                return(0);
                    400:        m->next = MDOC_NEXT_CHILD;
                    401:        return(1);
1.1       kristaps  402: }
                    403:
                    404:
1.23      kristaps  405: int
1.117     kristaps  406: mdoc_body_alloc(struct mdoc *m, int line, int pos, enum mdoct tok)
1.1       kristaps  407: {
                    408:        struct mdoc_node *p;
                    409:
1.91      kristaps  410:        p = node_alloc(m, line, pos, tok, MDOC_BODY);
1.102     kristaps  411:        if ( ! node_append(m, p))
                    412:                return(0);
                    413:        m->next = MDOC_NEXT_CHILD;
                    414:        return(1);
1.1       kristaps  415: }
                    416:
                    417:
1.23      kristaps  418: int
1.91      kristaps  419: mdoc_block_alloc(struct mdoc *m, int line, int pos,
1.117     kristaps  420:                enum mdoct tok, struct mdoc_arg *args)
1.1       kristaps  421: {
                    422:        struct mdoc_node *p;
                    423:
1.91      kristaps  424:        p = node_alloc(m, line, pos, tok, MDOC_BLOCK);
1.77      kristaps  425:        p->args = args;
                    426:        if (p->args)
1.53      kristaps  427:                (args->refcnt)++;
1.102     kristaps  428:        if ( ! node_append(m, p))
                    429:                return(0);
                    430:        m->next = MDOC_NEXT_CHILD;
                    431:        return(1);
1.1       kristaps  432: }
                    433:
                    434:
1.23      kristaps  435: int
1.91      kristaps  436: mdoc_elem_alloc(struct mdoc *m, int line, int pos,
1.117     kristaps  437:                enum mdoct tok, struct mdoc_arg *args)
1.1       kristaps  438: {
                    439:        struct mdoc_node *p;
                    440:
1.91      kristaps  441:        p = node_alloc(m, line, pos, tok, MDOC_ELEM);
1.77      kristaps  442:        p->args = args;
                    443:        if (p->args)
1.53      kristaps  444:                (args->refcnt)++;
1.102     kristaps  445:        if ( ! node_append(m, p))
                    446:                return(0);
                    447:        m->next = MDOC_NEXT_CHILD;
                    448:        return(1);
1.1       kristaps  449: }
                    450:
                    451:
1.124     kristaps  452: int
                    453: mdoc_word_alloc(struct mdoc *m, int line, int pos, const char *p)
1.1       kristaps  454: {
1.91      kristaps  455:        struct mdoc_node *n;
1.124     kristaps  456:        size_t            sv, len;
                    457:
                    458:        len = strlen(p);
1.1       kristaps  459:
1.125     kristaps  460:        n = node_alloc(m, line, pos, MDOC_MAX, MDOC_TEXT);
1.113     kristaps  461:        n->string = mandoc_malloc(len + 1);
1.91      kristaps  462:        sv = strlcpy(n->string, p, len + 1);
                    463:
                    464:        /* Prohibit truncation. */
                    465:        assert(sv < len + 1);
                    466:
1.101     kristaps  467:        if ( ! node_append(m, n))
                    468:                return(0);
1.124     kristaps  469:
1.101     kristaps  470:        m->next = MDOC_NEXT_SIBLING;
                    471:        return(1);
1.91      kristaps  472: }
                    473:
                    474:
1.53      kristaps  475: void
                    476: mdoc_node_free(struct mdoc_node *p)
1.1       kristaps  477: {
                    478:
1.53      kristaps  479:        if (p->string)
                    480:                free(p->string);
                    481:        if (p->args)
                    482:                mdoc_argv_free(p->args);
1.1       kristaps  483:        free(p);
                    484: }
                    485:
                    486:
1.121     kristaps  487: static void
                    488: mdoc_node_unlink(struct mdoc *m, struct mdoc_node *n)
                    489: {
                    490:
                    491:        /* Adjust siblings. */
                    492:
                    493:        if (n->prev)
                    494:                n->prev->next = n->next;
                    495:        if (n->next)
                    496:                n->next->prev = n->prev;
                    497:
                    498:        /* Adjust parent. */
                    499:
                    500:        if (n->parent) {
                    501:                n->parent->nchild--;
                    502:                if (n->parent->child == n)
                    503:                        n->parent->child = n->prev ? n->prev : n->next;
                    504:        }
                    505:
                    506:        /* Adjust parse point, if applicable. */
                    507:
                    508:        if (m && m->last == n) {
                    509:                if (n->prev) {
                    510:                        m->last = n->prev;
                    511:                        m->next = MDOC_NEXT_SIBLING;
                    512:                } else {
                    513:                        m->last = n->parent;
                    514:                        m->next = MDOC_NEXT_CHILD;
                    515:                }
                    516:        }
                    517:
                    518:        if (m && m->first == n)
                    519:                m->first = NULL;
                    520: }
                    521:
                    522:
1.53      kristaps  523: void
1.121     kristaps  524: mdoc_node_delete(struct mdoc *m, struct mdoc_node *p)
1.1       kristaps  525: {
                    526:
1.121     kristaps  527:        while (p->child) {
                    528:                assert(p->nchild);
                    529:                mdoc_node_delete(m, p->child);
                    530:        }
                    531:        assert(0 == p->nchild);
1.1       kristaps  532:
1.121     kristaps  533:        mdoc_node_unlink(m, p);
1.53      kristaps  534:        mdoc_node_free(p);
1.1       kristaps  535: }
                    536:
                    537:
1.53      kristaps  538: /*
                    539:  * Parse free-form text, that is, a line that does not begin with the
                    540:  * control character.
                    541:  */
                    542: static int
1.135     kristaps  543: mdoc_ptext(struct mdoc *m, int line, char *buf, int offs)
1.1       kristaps  544: {
1.137     schwarze  545:        char            *c, *ws, *end;
1.1       kristaps  546:
1.123     kristaps  547:        /* Ignore bogus comments. */
                    548:
1.135     kristaps  549:        if ('\\' == buf[offs] &&
                    550:                        '.' == buf[offs + 1] &&
                    551:                        '"' == buf[offs + 2])
1.136     kristaps  552:                return(mdoc_pmsg(m, line, offs, MANDOCERR_BADCOMMENT));
1.123     kristaps  553:
1.124     kristaps  554:        /* No text before an initial macro. */
                    555:
1.85      kristaps  556:        if (SEC_NONE == m->lastnamed)
1.136     kristaps  557:                return(mdoc_pmsg(m, line, offs, MANDOCERR_NOTEXT));
1.124     kristaps  558:
1.137     schwarze  559:        /*
                    560:         * Search for the beginning of unescaped trailing whitespace (ws)
                    561:         * and for the first character not to be output (end).
                    562:         */
1.139   ! kristaps  563:
        !           564:        /* FIXME: replace with strcspn(). */
1.137     schwarze  565:        ws = NULL;
                    566:        for (c = end = buf + offs; *c; c++) {
                    567:                switch (*c) {
1.138     kristaps  568:                case '-':
                    569:                        if (mandoc_hyph(buf + offs, c))
                    570:                                *c = ASCII_HYPH;
                    571:                        break;
1.137     schwarze  572:                case ' ':
                    573:                        if (NULL == ws)
                    574:                                ws = c;
                    575:                        continue;
                    576:                case '\t':
                    577:                        /*
                    578:                         * Always warn about trailing tabs,
                    579:                         * even outside literal context,
                    580:                         * where they should be put on the next line.
                    581:                         */
                    582:                        if (NULL == ws)
                    583:                                ws = c;
                    584:                        /*
                    585:                         * Strip trailing tabs in literal context only;
                    586:                         * outside, they affect the next line.
                    587:                         */
                    588:                        if (MDOC_LITERAL & m->flags)
                    589:                                continue;
                    590:                        break;
                    591:                case '\\':
                    592:                        /* Skip the escaped character, too, if any. */
                    593:                        if (c[1])
                    594:                                c++;
                    595:                        /* FALLTHROUGH */
                    596:                default:
                    597:                        ws = NULL;
                    598:                        break;
                    599:                }
                    600:                end = c + 1;
                    601:        }
                    602:        *end = '\0';
1.91      kristaps  603:
1.137     schwarze  604:        if (ws)
                    605:                if ( ! mdoc_pmsg(m, line, (int)(ws-buf), MANDOCERR_EOLNSPACE))
                    606:                        return(0);
1.115     kristaps  607:
1.137     schwarze  608:        if ('\0' == buf[offs] && ! (MDOC_LITERAL & m->flags)) {
                    609:                if ( ! mdoc_pmsg(m, line, (int)(c-buf), MANDOCERR_NOBLANKLN))
1.119     kristaps  610:                        return(0);
1.124     kristaps  611:
1.119     kristaps  612:                /*
1.124     kristaps  613:                 * Insert a `Pp' in the case of a blank line.  Technically,
                    614:                 * blank lines aren't allowed, but enough manuals assume this
                    615:                 * behaviour that we want to work around it.
1.119     kristaps  616:                 */
1.135     kristaps  617:                if ( ! mdoc_elem_alloc(m, line, offs, MDOC_Pp, NULL))
1.119     kristaps  618:                        return(0);
1.124     kristaps  619:
                    620:                m->next = MDOC_NEXT_SIBLING;
                    621:                return(1);
1.119     kristaps  622:        }
1.68      kristaps  623:
1.137     schwarze  624:        if ( ! mdoc_word_alloc(m, line, offs, buf+offs))
                    625:                return(0);
1.91      kristaps  626:
1.137     schwarze  627:        if (MDOC_LITERAL & m->flags)
                    628:                return(1);
1.128     kristaps  629:
                    630:        /*
                    631:         * End-of-sentence check.  If the last character is an unescaped
                    632:         * EOS character, then flag the node as being the end of a
                    633:         * sentence.  The front-end will know how to interpret this.
                    634:         */
1.132     kristaps  635:
1.137     schwarze  636:        assert(buf < end);
                    637:
                    638:        if (mandoc_eos(buf+offs, (size_t)(end-buf-offs)))
1.128     kristaps  639:                m->last->flags |= MDOC_EOS;
                    640:
                    641:        return(1);
1.1       kristaps  642: }
                    643:
                    644:
1.58      kristaps  645: static int
1.135     kristaps  646: macrowarn(struct mdoc *m, int ln, const char *buf, int offs)
1.58      kristaps  647: {
1.136     kristaps  648:        int              rc;
                    649:
                    650:        rc = mdoc_vmsg(m, MANDOCERR_MACRO, ln, offs,
                    651:                        "unknown macro: %s%s",
                    652:                        buf, strlen(buf) > 3 ? "..." : "");
                    653:
                    654:        /* FIXME: logic should be in driver. */
                    655:        return(MDOC_IGN_MACRO & m->pflags ? rc : 0);
1.58      kristaps  656: }
                    657:
                    658:
1.53      kristaps  659: /*
                    660:  * Parse a macro line, that is, a line beginning with the control
                    661:  * character.
                    662:  */
                    663: int
1.135     kristaps  664: mdoc_pmacro(struct mdoc *m, int ln, char *buf, int offs)
1.1       kristaps  665: {
1.125     kristaps  666:        enum mdoct      tok;
1.130     kristaps  667:        int             i, j, sv;
1.125     kristaps  668:        char            mac[5];
1.1       kristaps  669:
1.81      kristaps  670:        /* Empty lines are ignored. */
1.63      kristaps  671:
1.135     kristaps  672:        offs++;
                    673:
                    674:        if ('\0' == buf[offs])
1.63      kristaps  675:                return(1);
                    676:
1.135     kristaps  677:        i = offs;
1.100     kristaps  678:
                    679:        /* Accept whitespace after the initial control char. */
                    680:
                    681:        if (' ' == buf[i]) {
                    682:                i++;
1.65      kristaps  683:                while (buf[i] && ' ' == buf[i])
1.63      kristaps  684:                        i++;
1.115     kristaps  685:                if ('\0' == buf[i])
1.63      kristaps  686:                        return(1);
                    687:        }
1.1       kristaps  688:
1.130     kristaps  689:        sv = i;
                    690:
1.53      kristaps  691:        /* Copy the first word into a nil-terminated buffer. */
1.1       kristaps  692:
1.100     kristaps  693:        for (j = 0; j < 4; j++, i++) {
1.115     kristaps  694:                if ('\0' == (mac[j] = buf[i]))
1.53      kristaps  695:                        break;
1.65      kristaps  696:                else if (' ' == buf[i])
1.53      kristaps  697:                        break;
1.104     kristaps  698:
                    699:                /* Check for invalid characters. */
                    700:
                    701:                if (isgraph((u_char)buf[i]))
                    702:                        continue;
1.136     kristaps  703:                if ( ! mdoc_pmsg(m, ln, i, MANDOCERR_BADCHAR))
                    704:                        return(0);
                    705:                i--;
1.53      kristaps  706:        }
1.1       kristaps  707:
1.135     kristaps  708:        mac[j] = '\0';
1.1       kristaps  709:
1.100     kristaps  710:        if (j == 4 || j < 2) {
1.135     kristaps  711:                if ( ! macrowarn(m, ln, mac, sv))
1.58      kristaps  712:                        goto err;
                    713:                return(1);
1.53      kristaps  714:        }
                    715:
1.125     kristaps  716:        if (MDOC_MAX == (tok = mdoc_hash_find(mac))) {
1.135     kristaps  717:                if ( ! macrowarn(m, ln, mac, sv))
1.58      kristaps  718:                        goto err;
                    719:                return(1);
1.53      kristaps  720:        }
1.1       kristaps  721:
1.53      kristaps  722:        /* The macro is sane.  Jump to the next word. */
1.1       kristaps  723:
1.65      kristaps  724:        while (buf[i] && ' ' == buf[i])
1.53      kristaps  725:                i++;
1.1       kristaps  726:
1.125     kristaps  727:        /*
                    728:         * Trailing whitespace.  Note that tabs are allowed to be passed
                    729:         * into the parser as "text", so we only warn about spaces here.
                    730:         */
1.115     kristaps  731:
                    732:        if ('\0' == buf[i] && ' ' == buf[i - 1])
1.136     kristaps  733:                if ( ! mdoc_pmsg(m, ln, i - 1, MANDOCERR_EOLNSPACE))
1.115     kristaps  734:                        goto err;
                    735:
1.98      kristaps  736:        /*
                    737:         * Begin recursive parse sequence.  Since we're at the start of
                    738:         * the line, we don't need to do callable/parseable checks.
                    739:         */
1.130     kristaps  740:        if ( ! mdoc_macro(m, tok, ln, sv, &i, buf))
1.53      kristaps  741:                goto err;
1.1       kristaps  742:
1.53      kristaps  743:        return(1);
1.1       kristaps  744:
1.53      kristaps  745: err:   /* Error out. */
1.1       kristaps  746:
1.53      kristaps  747:        m->flags |= MDOC_HALT;
                    748:        return(0);
1.1       kristaps  749: }
1.100     kristaps  750:
                    751:

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