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Annotation of mandoc/mdoc.c, Revision 1.94

1.94    ! kristaps    1: /*     $Id: mdoc.c,v 1.93 2009/07/17 10:56:57 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:
1.89      kristaps   26: const  char *const __mdoc_merrnames[MERRMAX] = {
                     27:        "trailing whitespace", /* ETAILWS */
                     28:        "empty last list column", /* ECOLEMPTY */
                     29:        "unexpected quoted parameter", /* EQUOTPARM */
                     30:        "unterminated quoted parameter", /* EQUOTTERM */
                     31:        "system: malloc error", /* EMALLOC */
                     32:        "argument parameter suggested", /* EARGVAL */
                     33:        "macro not callable", /* ENOCALL */
                     34:        "macro disallowed in prologue", /* EBODYPROL */
                     35:        "macro disallowed in body", /* EPROLBODY */
                     36:        "text disallowed in prologue", /* ETEXTPROL */
                     37:        "blank line disallowed", /* ENOBLANK */
                     38:        "text parameter too long", /* ETOOLONG */
                     39:        "invalid escape sequence", /* EESCAPE */
                     40:        "invalid character", /* EPRINT */
                     41:        "document has no body", /* ENODAT */
                     42:        "document has no prologue", /* ENOPROLOGUE */
                     43:        "expected line arguments", /* ELINE */
                     44:        "invalid AT&T argument", /* EATT */
                     45:        "default name not yet set", /* ENAME */
                     46:        "missing list type", /* ELISTTYPE */
                     47:        "missing display type", /* EDISPTYPE */
                     48:        "too many display types", /* EMULTIDISP */
                     49:        "too many list types", /* EMULTILIST */
                     50:        "NAME section must be first", /* ESECNAME */
                     51:        "badly-formed NAME section", /* ENAMESECINC */
                     52:        "argument repeated", /* EARGREP */
                     53:        "expected boolean parameter", /* EBOOL */
                     54:        "inconsistent column syntax", /* ECOLMIS */
                     55:        "nested display invalid", /* ENESTDISP */
                     56:        "width argument missing", /* EMISSWIDTH */
                     57:        "invalid section for this manual section", /* EWRONGMSEC */
                     58:        "section out of conventional order", /* ESECOOO */
                     59:        "section repeated", /* ESECREP */
                     60:        "invalid standard argument", /* EBADSTAND */
                     61:        "multi-line arguments discouraged", /* ENOMULTILINE */
                     62:        "multi-line arguments suggested", /* EMULTILINE */
                     63:        "line arguments discouraged", /* ENOLINE */
                     64:        "prologue macro out of conventional order", /* EPROLOOO */
                     65:        "prologue macro repeated", /* EPROLREP */
                     66:        "invalid manual section", /* EBADMSEC */
                     67:        "invalid section", /* EBADSEC */
                     68:        "invalid font mode", /* EFONT */
                     69:        "invalid date syntax", /* EBADDATE */
                     70:        "invalid number format", /* ENUMFMT */
                     71:        "superfluous width argument", /* ENOWIDTH */
                     72:        "system: utsname error", /* EUTSNAME */
                     73:        "obsolete macro", /* EOBS */
                     74:        "macro-like parameter", /* EMACPARM */
                     75:        "end-of-line scope violation", /* EIMPBRK */
                     76:        "empty macro ignored", /* EIGNE */
                     77:        "unclosed explicit scope", /* EOPEN */
                     78:        "unterminated quoted phrase", /* EQUOTPHR */
                     79:        "closure macro without prior context", /* ENOCTX */
                     80:        "invalid whitespace after control character", /* ESPACE */
1.90      kristaps   81:        "no description found for library" /* ELIB */
1.89      kristaps   82: };
                     83:
1.1       kristaps   84: const  char *const __mdoc_macronames[MDOC_MAX] = {
1.82      kristaps   85:        "Ap",           "Dd",           "Dt",           "Os",
1.1       kristaps   86:        "Sh",           "Ss",           "Pp",           "D1",
                     87:        "Dl",           "Bd",           "Ed",           "Bl",
                     88:        "El",           "It",           "Ad",           "An",
                     89:        "Ar",           "Cd",           "Cm",           "Dv",
                     90:        "Er",           "Ev",           "Ex",           "Fa",
                     91:        "Fd",           "Fl",           "Fn",           "Ft",
                     92:        "Ic",           "In",           "Li",           "Nd",
                     93:        "Nm",           "Op",           "Ot",           "Pa",
                     94:        "Rv",           "St",           "Va",           "Vt",
                     95:        /* LINTED */
                     96:        "Xr",           "\%A",          "\%B",          "\%D",
                     97:        /* LINTED */
                     98:        "\%I",          "\%J",          "\%N",          "\%O",
                     99:        /* LINTED */
                    100:        "\%P",          "\%R",          "\%T",          "\%V",
                    101:        "Ac",           "Ao",           "Aq",           "At",
                    102:        "Bc",           "Bf",           "Bo",           "Bq",
                    103:        "Bsx",          "Bx",           "Db",           "Dc",
                    104:        "Do",           "Dq",           "Ec",           "Ef",
                    105:        "Em",           "Eo",           "Fx",           "Ms",
                    106:        "No",           "Ns",           "Nx",           "Ox",
                    107:        "Pc",           "Pf",           "Po",           "Pq",
                    108:        "Qc",           "Ql",           "Qo",           "Qq",
                    109:        "Re",           "Rs",           "Sc",           "So",
                    110:        "Sq",           "Sm",           "Sx",           "Sy",
                    111:        "Tn",           "Ux",           "Xc",           "Xo",
                    112:        "Fo",           "Fc",           "Oo",           "Oc",
                    113:        "Bk",           "Ek",           "Bt",           "Hf",
1.82      kristaps  114:        "Fr",           "Ud",           "Lb",           "Lp",
                    115:        "Lk",           "Mt",           "Brq",          "Bro",
1.64      kristaps  116:        /* LINTED */
1.82      kristaps  117:        "Brc",          "\%C",          "Es",           "En",
1.69      kristaps  118:        /* LINTED */
1.93      kristaps  119:        "Dx",           "\%Q",          "br",           "sp"
1.1       kristaps  120:        };
                    121:
                    122: const  char *const __mdoc_argnames[MDOC_ARG_MAX] = {
                    123:        "split",                "nosplit",              "ragged",
                    124:        "unfilled",             "literal",              "file",
                    125:        "offset",               "bullet",               "dash",
                    126:        "hyphen",               "item",                 "enum",
                    127:        "tag",                  "diag",                 "hang",
                    128:        "ohang",                "inset",                "column",
                    129:        "width",                "compact",              "std",
1.52      kristaps  130:        "filled",               "words",                "emphasis",
1.64      kristaps  131:        "symbolic",             "nested"
1.1       kristaps  132:        };
                    133:
                    134: const  char * const *mdoc_macronames = __mdoc_macronames;
                    135: const  char * const *mdoc_argnames = __mdoc_argnames;
                    136:
1.73      kristaps  137: static void              mdoc_free1(struct mdoc *);
                    138: static int               mdoc_alloc1(struct mdoc *);
                    139: static struct mdoc_node *node_alloc(struct mdoc *, int, int,
                    140:                                int, enum mdoc_type);
                    141: static int               node_append(struct mdoc *,
1.71      kristaps  142:                                struct mdoc_node *);
                    143: static int               parsetext(struct mdoc *, int, char *);
                    144: static int               parsemacro(struct mdoc *, int, char *);
                    145: static int               macrowarn(struct mdoc *, int, const char *);
1.91      kristaps  146: static int               pstring(struct mdoc *, int, int,
                    147:                                const char *, size_t);
1.88      kristaps  148:
1.92      kristaps  149: #ifdef __linux__
                    150: extern size_t            strlcpy(char *, const char *, size_t);
                    151: #endif
                    152:
1.71      kristaps  153:
1.1       kristaps  154: const struct mdoc_node *
1.71      kristaps  155: mdoc_node(const struct mdoc *m)
1.1       kristaps  156: {
                    157:
1.71      kristaps  158:        return(MDOC_HALT & m->flags ? NULL : m->first);
1.1       kristaps  159: }
                    160:
                    161:
1.37      kristaps  162: const struct mdoc_meta *
1.71      kristaps  163: mdoc_meta(const struct mdoc *m)
1.37      kristaps  164: {
                    165:
1.71      kristaps  166:        return(MDOC_HALT & m->flags ? NULL : &m->meta);
1.37      kristaps  167: }
                    168:
                    169:
1.85      kristaps  170: /*
                    171:  * Frees volatile resources (parse tree, meta-data, fields).
                    172:  */
1.73      kristaps  173: static void
                    174: mdoc_free1(struct mdoc *mdoc)
1.67      kristaps  175: {
                    176:
                    177:        if (mdoc->first)
                    178:                mdoc_node_freelist(mdoc->first);
                    179:        if (mdoc->meta.title)
                    180:                free(mdoc->meta.title);
                    181:        if (mdoc->meta.os)
                    182:                free(mdoc->meta.os);
                    183:        if (mdoc->meta.name)
                    184:                free(mdoc->meta.name);
                    185:        if (mdoc->meta.arch)
                    186:                free(mdoc->meta.arch);
                    187:        if (mdoc->meta.vol)
                    188:                free(mdoc->meta.vol);
1.73      kristaps  189: }
                    190:
                    191:
1.85      kristaps  192: /*
                    193:  * Allocate all volatile resources (parse tree, meta-data, fields).
                    194:  */
1.73      kristaps  195: static int
                    196: mdoc_alloc1(struct mdoc *mdoc)
                    197: {
1.67      kristaps  198:
                    199:        bzero(&mdoc->meta, sizeof(struct mdoc_meta));
                    200:        mdoc->flags = 0;
1.85      kristaps  201:        mdoc->lastnamed = mdoc->lastsec = SEC_NONE;
1.70      kristaps  202:        mdoc->last = calloc(1, sizeof(struct mdoc_node));
                    203:        if (NULL == mdoc->last)
1.73      kristaps  204:                return(0);
                    205:
1.70      kristaps  206:        mdoc->first = mdoc->last;
1.67      kristaps  207:        mdoc->last->type = MDOC_ROOT;
                    208:        mdoc->next = MDOC_NEXT_CHILD;
1.73      kristaps  209:        return(1);
                    210: }
                    211:
                    212:
                    213: /*
1.85      kristaps  214:  * Free up volatile resources (see mdoc_free1()) then re-initialises the
                    215:  * data with mdoc_alloc1().  After invocation, parse data has been reset
                    216:  * and the parser is ready for re-invocation on a new tree; however,
                    217:  * cross-parse non-volatile data is kept intact.
1.73      kristaps  218:  */
                    219: int
                    220: mdoc_reset(struct mdoc *mdoc)
                    221: {
                    222:
                    223:        mdoc_free1(mdoc);
                    224:        return(mdoc_alloc1(mdoc));
1.67      kristaps  225: }
                    226:
                    227:
1.68      kristaps  228: /*
1.85      kristaps  229:  * Completely free up all volatile and non-volatile parse resources.
                    230:  * After invocation, the pointer is no longer usable.
1.68      kristaps  231:  */
1.67      kristaps  232: void
1.38      kristaps  233: mdoc_free(struct mdoc *mdoc)
1.34      kristaps  234: {
                    235:
1.73      kristaps  236:        mdoc_free1(mdoc);
1.68      kristaps  237:        if (mdoc->htab)
1.74      kristaps  238:                mdoc_hash_free(mdoc->htab);
1.1       kristaps  239:        free(mdoc);
                    240: }
                    241:
                    242:
1.85      kristaps  243: /*
                    244:  * Allocate volatile and non-volatile parse resources.
                    245:  */
1.1       kristaps  246: struct mdoc *
1.55      kristaps  247: mdoc_alloc(void *data, int pflags, const struct mdoc_cb *cb)
1.1       kristaps  248: {
                    249:        struct mdoc     *p;
                    250:
1.70      kristaps  251:        if (NULL == (p = calloc(1, sizeof(struct mdoc))))
1.73      kristaps  252:                return(NULL);
1.74      kristaps  253:        if (cb)
                    254:                (void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
1.1       kristaps  255:
                    256:        p->data = data;
1.73      kristaps  257:        p->pflags = pflags;
                    258:
1.74      kristaps  259:        if (NULL == (p->htab = mdoc_hash_alloc())) {
                    260:                free(p);
                    261:                return(NULL);
                    262:        } else if (mdoc_alloc1(p))
                    263:                return(p);
1.1       kristaps  264:
1.73      kristaps  265:        free(p);
                    266:        return(NULL);
1.1       kristaps  267: }
                    268:
                    269:
1.68      kristaps  270: /*
                    271:  * Climb back up the parse tree, validating open scopes.  Mostly calls
1.85      kristaps  272:  * through to macro_end() in macro.c.
1.68      kristaps  273:  */
1.1       kristaps  274: int
1.72      kristaps  275: mdoc_endparse(struct mdoc *m)
1.20      kristaps  276: {
                    277:
1.72      kristaps  278:        if (MDOC_HALT & m->flags)
1.20      kristaps  279:                return(0);
1.72      kristaps  280:        else if (mdoc_macroend(m))
1.20      kristaps  281:                return(1);
1.72      kristaps  282:        m->flags |= MDOC_HALT;
                    283:        return(0);
1.20      kristaps  284: }
                    285:
                    286:
1.50      kristaps  287: /*
1.53      kristaps  288:  * Main parse routine.  Parses a single line -- really just hands off to
1.85      kristaps  289:  * the macro (parsemacro()) or text parser (parsetext()).
1.50      kristaps  290:  */
1.20      kristaps  291: int
1.53      kristaps  292: mdoc_parseln(struct mdoc *m, int ln, char *buf)
1.1       kristaps  293: {
                    294:
1.53      kristaps  295:        if (MDOC_HALT & m->flags)
1.20      kristaps  296:                return(0);
1.50      kristaps  297:
1.53      kristaps  298:        return('.' == *buf ? parsemacro(m, ln, buf) :
                    299:                        parsetext(m, ln, buf));
1.1       kristaps  300: }
                    301:
                    302:
                    303: int
1.31      kristaps  304: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
                    305:                const char *fmt, ...)
1.1       kristaps  306: {
1.31      kristaps  307:        char             buf[256];
                    308:        va_list          ap;
1.1       kristaps  309:
                    310:        if (NULL == mdoc->cb.mdoc_err)
                    311:                return(0);
1.31      kristaps  312:
                    313:        va_start(ap, fmt);
                    314:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    315:        va_end(ap);
1.88      kristaps  316:
1.31      kristaps  317:        return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
1.1       kristaps  318: }
                    319:
                    320:
                    321: int
1.87      kristaps  322: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos, const char *fmt, ...)
1.1       kristaps  323: {
1.31      kristaps  324:        char             buf[256];
                    325:        va_list          ap;
1.1       kristaps  326:
                    327:        if (NULL == mdoc->cb.mdoc_warn)
                    328:                return(0);
1.31      kristaps  329:
                    330:        va_start(ap, fmt);
                    331:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    332:        va_end(ap);
1.88      kristaps  333:
1.87      kristaps  334:        return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, buf));
1.1       kristaps  335: }
                    336:
                    337:
                    338: int
1.88      kristaps  339: mdoc_err(struct mdoc *m, int line, int pos, int iserr, enum merr type)
1.78      kristaps  340: {
1.89      kristaps  341:        const char      *p;
1.88      kristaps  342:
1.89      kristaps  343:        p = __mdoc_merrnames[(int)type];
1.73      kristaps  344:        assert(p);
1.88      kristaps  345:
                    346:        if (iserr)
                    347:                return(mdoc_verr(m, line, pos, p));
                    348:
                    349:        return(mdoc_vwarn(m, line, pos, p));
                    350: }
                    351:
                    352:
                    353: int
                    354: mdoc_macro(struct mdoc *m, int tok,
                    355:                int ln, int pp, int *pos, char *buf)
                    356: {
                    357:
                    358:        if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
                    359:                        MDOC_PBODY & m->flags)
                    360:                return(mdoc_perr(m, ln, pp, EPROLBODY));
                    361:        if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
                    362:                        ! (MDOC_PBODY & m->flags))
                    363:                return(mdoc_perr(m, ln, pp, EBODYPROL));
                    364:
                    365:        if (1 != pp && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
                    366:                return(mdoc_perr(m, ln, pp, ENOCALL));
                    367:
                    368:        return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
1.73      kristaps  369: }
                    370:
                    371:
                    372: static int
                    373: node_append(struct mdoc *mdoc, struct mdoc_node *p)
1.1       kristaps  374: {
                    375:
1.25      kristaps  376:        assert(mdoc->last);
                    377:        assert(mdoc->first);
                    378:        assert(MDOC_ROOT != p->type);
1.1       kristaps  379:
1.13      kristaps  380:        switch (mdoc->next) {
                    381:        case (MDOC_NEXT_SIBLING):
1.6       kristaps  382:                mdoc->last->next = p;
                    383:                p->prev = mdoc->last;
1.13      kristaps  384:                p->parent = mdoc->last->parent;
1.1       kristaps  385:                break;
1.13      kristaps  386:        case (MDOC_NEXT_CHILD):
                    387:                mdoc->last->child = p;
1.1       kristaps  388:                p->parent = mdoc->last;
                    389:                break;
                    390:        default:
1.13      kristaps  391:                abort();
                    392:                /* NOTREACHED */
1.1       kristaps  393:        }
                    394:
1.86      kristaps  395:        p->parent->nchild++;
                    396:
1.23      kristaps  397:        if ( ! mdoc_valid_pre(mdoc, p))
                    398:                return(0);
1.68      kristaps  399:        if ( ! mdoc_action_pre(mdoc, p))
                    400:                return(0);
1.27      kristaps  401:
                    402:        switch (p->type) {
                    403:        case (MDOC_HEAD):
                    404:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  405:                p->parent->head = p;
1.27      kristaps  406:                break;
                    407:        case (MDOC_TAIL):
                    408:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  409:                p->parent->tail = p;
1.27      kristaps  410:                break;
                    411:        case (MDOC_BODY):
                    412:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  413:                p->parent->body = p;
1.27      kristaps  414:                break;
                    415:        default:
                    416:                break;
                    417:        }
                    418:
1.1       kristaps  419:        mdoc->last = p;
1.71      kristaps  420:
                    421:        switch (p->type) {
                    422:        case (MDOC_TEXT):
                    423:                if ( ! mdoc_valid_post(mdoc))
                    424:                        return(0);
                    425:                if ( ! mdoc_action_post(mdoc))
                    426:                        return(0);
                    427:                break;
                    428:        default:
                    429:                break;
                    430:        }
                    431:
1.23      kristaps  432:        return(1);
1.1       kristaps  433: }
                    434:
                    435:
1.45      kristaps  436: static struct mdoc_node *
1.91      kristaps  437: node_alloc(struct mdoc *m, int line,
1.73      kristaps  438:                int pos, int tok, enum mdoc_type type)
1.45      kristaps  439: {
1.46      kristaps  440:        struct mdoc_node *p;
                    441:
1.73      kristaps  442:        if (NULL == (p = calloc(1, sizeof(struct mdoc_node)))) {
1.91      kristaps  443:                (void)mdoc_nerr(m, m->last, EMALLOC);
1.73      kristaps  444:                return(NULL);
                    445:        }
                    446:
1.91      kristaps  447:        p->sec = m->lastsec;
1.73      kristaps  448:        p->line = line;
                    449:        p->pos = pos;
                    450:        p->tok = tok;
                    451:        if (MDOC_TEXT != (p->type = type))
                    452:                assert(p->tok >= 0);
1.45      kristaps  453:
1.46      kristaps  454:        return(p);
1.45      kristaps  455: }
                    456:
                    457:
1.23      kristaps  458: int
1.91      kristaps  459: mdoc_tail_alloc(struct mdoc *m, int line, int pos, int tok)
1.17      kristaps  460: {
                    461:        struct mdoc_node *p;
                    462:
1.91      kristaps  463:        p = node_alloc(m, line, pos, tok, MDOC_TAIL);
1.73      kristaps  464:        if (NULL == p)
                    465:                return(0);
1.91      kristaps  466:        return(node_append(m, p));
1.17      kristaps  467: }
                    468:
                    469:
1.23      kristaps  470: int
1.91      kristaps  471: mdoc_head_alloc(struct mdoc *m, int line, int pos, int tok)
1.1       kristaps  472: {
                    473:        struct mdoc_node *p;
                    474:
1.91      kristaps  475:        assert(m->first);
                    476:        assert(m->last);
1.1       kristaps  477:
1.91      kristaps  478:        p = node_alloc(m, line, pos, tok, MDOC_HEAD);
1.73      kristaps  479:        if (NULL == p)
                    480:                return(0);
1.91      kristaps  481:        return(node_append(m, p));
1.1       kristaps  482: }
                    483:
                    484:
1.23      kristaps  485: int
1.91      kristaps  486: mdoc_body_alloc(struct mdoc *m, int line, int pos, int tok)
1.1       kristaps  487: {
                    488:        struct mdoc_node *p;
                    489:
1.91      kristaps  490:        p = node_alloc(m, line, pos, tok, MDOC_BODY);
1.73      kristaps  491:        if (NULL == p)
                    492:                return(0);
1.91      kristaps  493:        return(node_append(m, p));
1.1       kristaps  494: }
                    495:
                    496:
1.23      kristaps  497: int
1.91      kristaps  498: mdoc_block_alloc(struct mdoc *m, int line, int pos,
1.53      kristaps  499:                int tok, struct mdoc_arg *args)
1.1       kristaps  500: {
                    501:        struct mdoc_node *p;
                    502:
1.91      kristaps  503:        p = node_alloc(m, line, pos, tok, MDOC_BLOCK);
1.73      kristaps  504:        if (NULL == p)
                    505:                return(0);
1.77      kristaps  506:        p->args = args;
                    507:        if (p->args)
1.53      kristaps  508:                (args->refcnt)++;
1.91      kristaps  509:        return(node_append(m, p));
1.1       kristaps  510: }
                    511:
                    512:
1.23      kristaps  513: int
1.91      kristaps  514: mdoc_elem_alloc(struct mdoc *m, int line, int pos,
1.53      kristaps  515:                int tok, struct mdoc_arg *args)
1.1       kristaps  516: {
                    517:        struct mdoc_node *p;
                    518:
1.91      kristaps  519:        p = node_alloc(m, line, pos, tok, MDOC_ELEM);
1.73      kristaps  520:        if (NULL == p)
                    521:                return(0);
1.77      kristaps  522:        p->args = args;
                    523:        if (p->args)
1.53      kristaps  524:                (args->refcnt)++;
1.91      kristaps  525:        return(node_append(m, p));
1.1       kristaps  526: }
                    527:
                    528:
1.91      kristaps  529: static int
                    530: pstring(struct mdoc *m, int line, int pos, const char *p, size_t len)
1.1       kristaps  531: {
1.91      kristaps  532:        struct mdoc_node *n;
                    533:        size_t            sv;
1.1       kristaps  534:
1.91      kristaps  535:        n = node_alloc(m, line, pos, -1, MDOC_TEXT);
                    536:        if (NULL == n)
                    537:                return(mdoc_nerr(m, m->last, EMALLOC));
                    538:
                    539:        n->string = malloc(len + 1);
                    540:        if (NULL == n->string) {
                    541:                free(n);
                    542:                return(mdoc_nerr(m, m->last, EMALLOC));
1.73      kristaps  543:        }
1.88      kristaps  544:
1.91      kristaps  545:        sv = strlcpy(n->string, p, len + 1);
                    546:
                    547:        /* Prohibit truncation. */
                    548:        assert(sv < len + 1);
                    549:
                    550:        return(node_append(m, n));
                    551: }
                    552:
                    553:
                    554: int
                    555: mdoc_word_alloc(struct mdoc *m, int line, int pos, const char *p)
                    556: {
                    557:
                    558:        return(pstring(m, line, pos, p, strlen(p)));
1.1       kristaps  559: }
                    560:
                    561:
1.53      kristaps  562: void
                    563: mdoc_node_free(struct mdoc_node *p)
1.1       kristaps  564: {
                    565:
1.86      kristaps  566:        if (p->parent)
                    567:                p->parent->nchild--;
1.53      kristaps  568:        if (p->string)
                    569:                free(p->string);
                    570:        if (p->args)
                    571:                mdoc_argv_free(p->args);
1.1       kristaps  572:        free(p);
                    573: }
                    574:
                    575:
1.53      kristaps  576: void
                    577: mdoc_node_freelist(struct mdoc_node *p)
1.1       kristaps  578: {
                    579:
1.53      kristaps  580:        if (p->child)
                    581:                mdoc_node_freelist(p->child);
                    582:        if (p->next)
                    583:                mdoc_node_freelist(p->next);
1.1       kristaps  584:
1.86      kristaps  585:        assert(0 == p->nchild);
1.53      kristaps  586:        mdoc_node_free(p);
1.1       kristaps  587: }
                    588:
                    589:
1.53      kristaps  590: /*
                    591:  * Parse free-form text, that is, a line that does not begin with the
                    592:  * control character.
                    593:  */
                    594: static int
1.68      kristaps  595: parsetext(struct mdoc *m, int line, char *buf)
1.1       kristaps  596: {
1.91      kristaps  597:        int              i, j;
1.1       kristaps  598:
1.85      kristaps  599:        if (SEC_NONE == m->lastnamed)
1.88      kristaps  600:                return(mdoc_perr(m, line, 0, ETEXTPROL));
1.91      kristaps  601:
                    602:        /*
                    603:         * If in literal mode, then pass the buffer directly to the
                    604:         * back-end, as it should be preserved as a single term.
                    605:         */
                    606:
                    607:        if (MDOC_LITERAL & m->flags) {
                    608:                if ( ! mdoc_word_alloc(m, line, 0, buf))
                    609:                        return(0);
                    610:                m->next = MDOC_NEXT_SIBLING;
                    611:                return(1);
                    612:        }
                    613:
                    614:        /* Disallow blank/white-space lines in non-literal mode. */
1.1       kristaps  615:
1.91      kristaps  616:        for (i = 0; ' ' == buf[i]; i++)
                    617:                /* Skip leading whitespace. */ ;
                    618:        if (0 == buf[i])
1.88      kristaps  619:                return(mdoc_perr(m, line, 0, ENOBLANK));
1.68      kristaps  620:
1.91      kristaps  621:        /*
                    622:         * Break apart a free-form line into tokens.  Spaces are
                    623:         * stripped out of the input.
                    624:         */
                    625:
                    626:        for (j = i; buf[i]; i++) {
                    627:                if (' ' != buf[i])
                    628:                        continue;
                    629:
                    630:                /* Escaped whitespace. */
                    631:                if (i && ' ' == buf[i] && '\\' == buf[i - 1])
                    632:                        continue;
                    633:
                    634:                buf[i++] = 0;
                    635:                if ( ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
                    636:                        return(0);
                    637:                m->next = MDOC_NEXT_SIBLING;
                    638:
                    639:                for ( ; ' ' == buf[i]; i++)
                    640:                        /* Skip trailing whitespace. */ ;
                    641:
                    642:                j = i;
                    643:                if (0 == buf[i])
                    644:                        break;
                    645:        }
                    646:
                    647:        if (j != i && ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
1.53      kristaps  648:                return(0);
1.1       kristaps  649:
1.68      kristaps  650:        m->next = MDOC_NEXT_SIBLING;
1.53      kristaps  651:        return(1);
1.1       kristaps  652: }
                    653:
                    654:
1.91      kristaps  655:
                    656:
1.58      kristaps  657: static int
                    658: macrowarn(struct mdoc *m, int ln, const char *buf)
                    659: {
                    660:        if ( ! (MDOC_IGN_MACRO & m->pflags))
1.88      kristaps  661:                return(mdoc_verr(m, ln, 1,
1.73      kristaps  662:                                "unknown macro: %s%s",
1.59      kristaps  663:                                buf, strlen(buf) > 3 ? "..." : ""));
1.88      kristaps  664:        return(mdoc_vwarn(m, ln, 1, "unknown macro: %s%s",
1.59      kristaps  665:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  666: }
                    667:
                    668:
1.53      kristaps  669: /*
                    670:  * Parse a macro line, that is, a line beginning with the control
                    671:  * character.
                    672:  */
                    673: int
                    674: parsemacro(struct mdoc *m, int ln, char *buf)
1.1       kristaps  675: {
1.53      kristaps  676:        int               i, c;
                    677:        char              mac[5];
1.1       kristaps  678:
1.81      kristaps  679:        /* Empty lines are ignored. */
1.63      kristaps  680:
                    681:        if (0 == buf[1])
                    682:                return(1);
                    683:
1.65      kristaps  684:        if (' ' == buf[1]) {
1.63      kristaps  685:                i = 2;
1.65      kristaps  686:                while (buf[i] && ' ' == buf[i])
1.63      kristaps  687:                        i++;
                    688:                if (0 == buf[i])
                    689:                        return(1);
1.88      kristaps  690:                return(mdoc_perr(m, ln, 1, ESPACE));
1.63      kristaps  691:        }
1.1       kristaps  692:
1.53      kristaps  693:        /* Copy the first word into a nil-terminated buffer. */
1.1       kristaps  694:
1.53      kristaps  695:        for (i = 1; i < 5; i++) {
                    696:                if (0 == (mac[i - 1] = buf[i]))
                    697:                        break;
1.65      kristaps  698:                else if (' ' == buf[i])
1.53      kristaps  699:                        break;
                    700:        }
1.1       kristaps  701:
1.53      kristaps  702:        mac[i - 1] = 0;
1.1       kristaps  703:
1.53      kristaps  704:        if (i == 5 || i <= 2) {
1.58      kristaps  705:                if ( ! macrowarn(m, ln, mac))
                    706:                        goto err;
                    707:                return(1);
1.53      kristaps  708:        }
                    709:
1.74      kristaps  710:        if (MDOC_MAX == (c = mdoc_hash_find(m->htab, mac))) {
1.58      kristaps  711:                if ( ! macrowarn(m, ln, mac))
                    712:                        goto err;
                    713:                return(1);
1.53      kristaps  714:        }
1.1       kristaps  715:
1.53      kristaps  716:        /* The macro is sane.  Jump to the next word. */
1.1       kristaps  717:
1.65      kristaps  718:        while (buf[i] && ' ' == buf[i])
1.53      kristaps  719:                i++;
1.1       kristaps  720:
1.53      kristaps  721:        /* Begin recursive parse sequence. */
1.1       kristaps  722:
1.53      kristaps  723:        if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
                    724:                goto err;
1.1       kristaps  725:
1.53      kristaps  726:        return(1);
1.1       kristaps  727:
1.53      kristaps  728: err:   /* Error out. */
1.1       kristaps  729:
1.53      kristaps  730:        m->flags |= MDOC_HALT;
                    731:        return(0);
1.1       kristaps  732: }

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