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Annotation of mandoc/mdoc.c, Revision 1.106

1.106   ! kristaps    1: /*     $Id: mdoc.c,v 1.105 2009/09/16 14:40:56 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:  */
1.106   ! kristaps   17: #include <sys/types.h>
        !            18:
1.1       kristaps   19: #include <assert.h>
                     20: #include <ctype.h>
                     21: #include <stdarg.h>
1.73      kristaps   22: #include <stdio.h>
1.1       kristaps   23: #include <stdlib.h>
                     24: #include <string.h>
                     25:
1.70      kristaps   26: #include "libmdoc.h"
1.1       kristaps   27:
1.89      kristaps   28: const  char *const __mdoc_merrnames[MERRMAX] = {
                     29:        "trailing whitespace", /* ETAILWS */
                     30:        "unexpected quoted parameter", /* EQUOTPARM */
                     31:        "unterminated quoted parameter", /* EQUOTTERM */
                     32:        "system: malloc error", /* EMALLOC */
                     33:        "argument parameter suggested", /* EARGVAL */
                     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:        "end-of-line scope violation", /* EIMPBRK */
                     75:        "empty macro ignored", /* EIGNE */
                     76:        "unclosed explicit scope", /* EOPEN */
                     77:        "unterminated quoted phrase", /* EQUOTPHR */
                     78:        "closure macro without prior context", /* ENOCTX */
1.90      kristaps   79:        "no description found for library" /* ELIB */
1.89      kristaps   80: };
                     81:
1.1       kristaps   82: const  char *const __mdoc_macronames[MDOC_MAX] = {
1.82      kristaps   83:        "Ap",           "Dd",           "Dt",           "Os",
1.1       kristaps   84:        "Sh",           "Ss",           "Pp",           "D1",
                     85:        "Dl",           "Bd",           "Ed",           "Bl",
                     86:        "El",           "It",           "Ad",           "An",
                     87:        "Ar",           "Cd",           "Cm",           "Dv",
                     88:        "Er",           "Ev",           "Ex",           "Fa",
                     89:        "Fd",           "Fl",           "Fn",           "Ft",
                     90:        "Ic",           "In",           "Li",           "Nd",
                     91:        "Nm",           "Op",           "Ot",           "Pa",
                     92:        "Rv",           "St",           "Va",           "Vt",
                     93:        /* LINTED */
                     94:        "Xr",           "\%A",          "\%B",          "\%D",
                     95:        /* LINTED */
                     96:        "\%I",          "\%J",          "\%N",          "\%O",
                     97:        /* LINTED */
                     98:        "\%P",          "\%R",          "\%T",          "\%V",
                     99:        "Ac",           "Ao",           "Aq",           "At",
                    100:        "Bc",           "Bf",           "Bo",           "Bq",
                    101:        "Bsx",          "Bx",           "Db",           "Dc",
                    102:        "Do",           "Dq",           "Ec",           "Ef",
                    103:        "Em",           "Eo",           "Fx",           "Ms",
                    104:        "No",           "Ns",           "Nx",           "Ox",
                    105:        "Pc",           "Pf",           "Po",           "Pq",
                    106:        "Qc",           "Ql",           "Qo",           "Qq",
                    107:        "Re",           "Rs",           "Sc",           "So",
                    108:        "Sq",           "Sm",           "Sx",           "Sy",
                    109:        "Tn",           "Ux",           "Xc",           "Xo",
                    110:        "Fo",           "Fc",           "Oo",           "Oc",
                    111:        "Bk",           "Ek",           "Bt",           "Hf",
1.82      kristaps  112:        "Fr",           "Ud",           "Lb",           "Lp",
                    113:        "Lk",           "Mt",           "Brq",          "Bro",
1.64      kristaps  114:        /* LINTED */
1.82      kristaps  115:        "Brc",          "\%C",          "Es",           "En",
1.69      kristaps  116:        /* LINTED */
1.93      kristaps  117:        "Dx",           "\%Q",          "br",           "sp"
1.1       kristaps  118:        };
                    119:
                    120: const  char *const __mdoc_argnames[MDOC_ARG_MAX] = {
                    121:        "split",                "nosplit",              "ragged",
                    122:        "unfilled",             "literal",              "file",
                    123:        "offset",               "bullet",               "dash",
                    124:        "hyphen",               "item",                 "enum",
                    125:        "tag",                  "diag",                 "hang",
                    126:        "ohang",                "inset",                "column",
                    127:        "width",                "compact",              "std",
1.52      kristaps  128:        "filled",               "words",                "emphasis",
1.64      kristaps  129:        "symbolic",             "nested"
1.1       kristaps  130:        };
                    131:
                    132: const  char * const *mdoc_macronames = __mdoc_macronames;
                    133: const  char * const *mdoc_argnames = __mdoc_argnames;
                    134:
1.73      kristaps  135: static void              mdoc_free1(struct mdoc *);
                    136: static int               mdoc_alloc1(struct mdoc *);
                    137: static struct mdoc_node *node_alloc(struct mdoc *, int, int,
                    138:                                int, enum mdoc_type);
                    139: static int               node_append(struct mdoc *,
1.71      kristaps  140:                                struct mdoc_node *);
                    141: static int               parsetext(struct mdoc *, int, char *);
                    142: static int               parsemacro(struct mdoc *, int, char *);
                    143: static int               macrowarn(struct mdoc *, int, const char *);
1.91      kristaps  144: static int               pstring(struct mdoc *, int, int,
                    145:                                const char *, size_t);
1.88      kristaps  146:
1.92      kristaps  147: #ifdef __linux__
                    148: extern size_t            strlcpy(char *, const char *, size_t);
                    149: #endif
                    150:
1.71      kristaps  151:
1.1       kristaps  152: const struct mdoc_node *
1.71      kristaps  153: mdoc_node(const struct mdoc *m)
1.1       kristaps  154: {
                    155:
1.71      kristaps  156:        return(MDOC_HALT & m->flags ? NULL : m->first);
1.1       kristaps  157: }
                    158:
                    159:
1.37      kristaps  160: const struct mdoc_meta *
1.71      kristaps  161: mdoc_meta(const struct mdoc *m)
1.37      kristaps  162: {
                    163:
1.71      kristaps  164:        return(MDOC_HALT & m->flags ? NULL : &m->meta);
1.37      kristaps  165: }
                    166:
                    167:
1.85      kristaps  168: /*
                    169:  * Frees volatile resources (parse tree, meta-data, fields).
                    170:  */
1.73      kristaps  171: static void
                    172: mdoc_free1(struct mdoc *mdoc)
1.67      kristaps  173: {
                    174:
                    175:        if (mdoc->first)
                    176:                mdoc_node_freelist(mdoc->first);
                    177:        if (mdoc->meta.title)
                    178:                free(mdoc->meta.title);
                    179:        if (mdoc->meta.os)
                    180:                free(mdoc->meta.os);
                    181:        if (mdoc->meta.name)
                    182:                free(mdoc->meta.name);
                    183:        if (mdoc->meta.arch)
                    184:                free(mdoc->meta.arch);
                    185:        if (mdoc->meta.vol)
                    186:                free(mdoc->meta.vol);
1.73      kristaps  187: }
                    188:
                    189:
1.85      kristaps  190: /*
                    191:  * Allocate all volatile resources (parse tree, meta-data, fields).
                    192:  */
1.73      kristaps  193: static int
                    194: mdoc_alloc1(struct mdoc *mdoc)
                    195: {
1.67      kristaps  196:
                    197:        bzero(&mdoc->meta, sizeof(struct mdoc_meta));
                    198:        mdoc->flags = 0;
1.85      kristaps  199:        mdoc->lastnamed = mdoc->lastsec = SEC_NONE;
1.70      kristaps  200:        mdoc->last = calloc(1, sizeof(struct mdoc_node));
                    201:        if (NULL == mdoc->last)
1.73      kristaps  202:                return(0);
                    203:
1.70      kristaps  204:        mdoc->first = mdoc->last;
1.67      kristaps  205:        mdoc->last->type = MDOC_ROOT;
                    206:        mdoc->next = MDOC_NEXT_CHILD;
1.73      kristaps  207:        return(1);
                    208: }
                    209:
                    210:
                    211: /*
1.85      kristaps  212:  * Free up volatile resources (see mdoc_free1()) then re-initialises the
                    213:  * data with mdoc_alloc1().  After invocation, parse data has been reset
                    214:  * and the parser is ready for re-invocation on a new tree; however,
                    215:  * cross-parse non-volatile data is kept intact.
1.73      kristaps  216:  */
                    217: int
                    218: mdoc_reset(struct mdoc *mdoc)
                    219: {
                    220:
                    221:        mdoc_free1(mdoc);
                    222:        return(mdoc_alloc1(mdoc));
1.67      kristaps  223: }
                    224:
                    225:
1.68      kristaps  226: /*
1.85      kristaps  227:  * Completely free up all volatile and non-volatile parse resources.
                    228:  * After invocation, the pointer is no longer usable.
1.68      kristaps  229:  */
1.67      kristaps  230: void
1.38      kristaps  231: mdoc_free(struct mdoc *mdoc)
1.34      kristaps  232: {
                    233:
1.73      kristaps  234:        mdoc_free1(mdoc);
1.1       kristaps  235:        free(mdoc);
                    236: }
                    237:
                    238:
1.85      kristaps  239: /*
                    240:  * Allocate volatile and non-volatile parse resources.
                    241:  */
1.1       kristaps  242: struct mdoc *
1.55      kristaps  243: mdoc_alloc(void *data, int pflags, const struct mdoc_cb *cb)
1.1       kristaps  244: {
                    245:        struct mdoc     *p;
                    246:
1.70      kristaps  247:        if (NULL == (p = calloc(1, sizeof(struct mdoc))))
1.73      kristaps  248:                return(NULL);
1.74      kristaps  249:        if (cb)
                    250:                (void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
1.1       kristaps  251:
1.105     kristaps  252:        mdoc_hash_init();
                    253:
1.1       kristaps  254:        p->data = data;
1.73      kristaps  255:        p->pflags = pflags;
                    256:
1.105     kristaps  257:        if (mdoc_alloc1(p))
1.74      kristaps  258:                return(p);
1.1       kristaps  259:
1.73      kristaps  260:        free(p);
                    261:        return(NULL);
1.1       kristaps  262: }
                    263:
                    264:
1.68      kristaps  265: /*
                    266:  * Climb back up the parse tree, validating open scopes.  Mostly calls
1.85      kristaps  267:  * through to macro_end() in macro.c.
1.68      kristaps  268:  */
1.1       kristaps  269: int
1.72      kristaps  270: mdoc_endparse(struct mdoc *m)
1.20      kristaps  271: {
                    272:
1.72      kristaps  273:        if (MDOC_HALT & m->flags)
1.20      kristaps  274:                return(0);
1.72      kristaps  275:        else if (mdoc_macroend(m))
1.20      kristaps  276:                return(1);
1.72      kristaps  277:        m->flags |= MDOC_HALT;
                    278:        return(0);
1.20      kristaps  279: }
                    280:
                    281:
1.50      kristaps  282: /*
1.53      kristaps  283:  * Main parse routine.  Parses a single line -- really just hands off to
1.85      kristaps  284:  * the macro (parsemacro()) or text parser (parsetext()).
1.50      kristaps  285:  */
1.20      kristaps  286: int
1.53      kristaps  287: mdoc_parseln(struct mdoc *m, int ln, char *buf)
1.1       kristaps  288: {
                    289:
1.53      kristaps  290:        if (MDOC_HALT & m->flags)
1.20      kristaps  291:                return(0);
1.50      kristaps  292:
1.53      kristaps  293:        return('.' == *buf ? parsemacro(m, ln, buf) :
                    294:                        parsetext(m, ln, buf));
1.1       kristaps  295: }
                    296:
                    297:
                    298: int
1.31      kristaps  299: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
                    300:                const char *fmt, ...)
1.1       kristaps  301: {
1.31      kristaps  302:        char             buf[256];
                    303:        va_list          ap;
1.1       kristaps  304:
                    305:        if (NULL == mdoc->cb.mdoc_err)
                    306:                return(0);
1.31      kristaps  307:
                    308:        va_start(ap, fmt);
                    309:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    310:        va_end(ap);
1.88      kristaps  311:
1.31      kristaps  312:        return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
1.1       kristaps  313: }
                    314:
                    315:
                    316: int
1.87      kristaps  317: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos, const char *fmt, ...)
1.1       kristaps  318: {
1.31      kristaps  319:        char             buf[256];
                    320:        va_list          ap;
1.1       kristaps  321:
                    322:        if (NULL == mdoc->cb.mdoc_warn)
                    323:                return(0);
1.31      kristaps  324:
                    325:        va_start(ap, fmt);
                    326:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    327:        va_end(ap);
1.88      kristaps  328:
1.87      kristaps  329:        return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, buf));
1.1       kristaps  330: }
                    331:
                    332:
                    333: int
1.88      kristaps  334: mdoc_err(struct mdoc *m, int line, int pos, int iserr, enum merr type)
1.78      kristaps  335: {
1.89      kristaps  336:        const char      *p;
1.88      kristaps  337:
1.89      kristaps  338:        p = __mdoc_merrnames[(int)type];
1.73      kristaps  339:        assert(p);
1.88      kristaps  340:
                    341:        if (iserr)
                    342:                return(mdoc_verr(m, line, pos, p));
                    343:
                    344:        return(mdoc_vwarn(m, line, pos, p));
                    345: }
                    346:
                    347:
                    348: int
                    349: mdoc_macro(struct mdoc *m, int tok,
                    350:                int ln, int pp, int *pos, char *buf)
                    351: {
1.97      kristaps  352:        /*
                    353:         * If we're in the prologue, deny "body" macros.  Similarly, if
                    354:         * we're in the body, deny prologue calls.
                    355:         */
1.88      kristaps  356:        if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
                    357:                        MDOC_PBODY & m->flags)
                    358:                return(mdoc_perr(m, ln, pp, EPROLBODY));
                    359:        if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
                    360:                        ! (MDOC_PBODY & m->flags))
                    361:                return(mdoc_perr(m, ln, pp, EBODYPROL));
                    362:
                    363:        return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
1.73      kristaps  364: }
                    365:
                    366:
                    367: static int
                    368: node_append(struct mdoc *mdoc, struct mdoc_node *p)
1.1       kristaps  369: {
                    370:
1.25      kristaps  371:        assert(mdoc->last);
                    372:        assert(mdoc->first);
                    373:        assert(MDOC_ROOT != p->type);
1.1       kristaps  374:
1.13      kristaps  375:        switch (mdoc->next) {
                    376:        case (MDOC_NEXT_SIBLING):
1.6       kristaps  377:                mdoc->last->next = p;
                    378:                p->prev = mdoc->last;
1.13      kristaps  379:                p->parent = mdoc->last->parent;
1.1       kristaps  380:                break;
1.13      kristaps  381:        case (MDOC_NEXT_CHILD):
                    382:                mdoc->last->child = p;
1.1       kristaps  383:                p->parent = mdoc->last;
                    384:                break;
                    385:        default:
1.13      kristaps  386:                abort();
                    387:                /* NOTREACHED */
1.1       kristaps  388:        }
                    389:
1.86      kristaps  390:        p->parent->nchild++;
                    391:
1.23      kristaps  392:        if ( ! mdoc_valid_pre(mdoc, p))
                    393:                return(0);
1.68      kristaps  394:        if ( ! mdoc_action_pre(mdoc, p))
                    395:                return(0);
1.27      kristaps  396:
                    397:        switch (p->type) {
                    398:        case (MDOC_HEAD):
                    399:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  400:                p->parent->head = p;
1.27      kristaps  401:                break;
                    402:        case (MDOC_TAIL):
                    403:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  404:                p->parent->tail = p;
1.27      kristaps  405:                break;
                    406:        case (MDOC_BODY):
                    407:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  408:                p->parent->body = p;
1.27      kristaps  409:                break;
                    410:        default:
                    411:                break;
                    412:        }
                    413:
1.1       kristaps  414:        mdoc->last = p;
1.71      kristaps  415:
                    416:        switch (p->type) {
                    417:        case (MDOC_TEXT):
                    418:                if ( ! mdoc_valid_post(mdoc))
                    419:                        return(0);
                    420:                if ( ! mdoc_action_post(mdoc))
                    421:                        return(0);
                    422:                break;
                    423:        default:
                    424:                break;
                    425:        }
                    426:
1.23      kristaps  427:        return(1);
1.1       kristaps  428: }
                    429:
                    430:
1.45      kristaps  431: static struct mdoc_node *
1.91      kristaps  432: node_alloc(struct mdoc *m, int line,
1.73      kristaps  433:                int pos, int tok, enum mdoc_type type)
1.45      kristaps  434: {
1.46      kristaps  435:        struct mdoc_node *p;
                    436:
1.73      kristaps  437:        if (NULL == (p = calloc(1, sizeof(struct mdoc_node)))) {
1.91      kristaps  438:                (void)mdoc_nerr(m, m->last, EMALLOC);
1.73      kristaps  439:                return(NULL);
                    440:        }
                    441:
1.91      kristaps  442:        p->sec = m->lastsec;
1.73      kristaps  443:        p->line = line;
                    444:        p->pos = pos;
                    445:        p->tok = tok;
                    446:        if (MDOC_TEXT != (p->type = type))
                    447:                assert(p->tok >= 0);
1.45      kristaps  448:
1.46      kristaps  449:        return(p);
1.45      kristaps  450: }
                    451:
                    452:
1.23      kristaps  453: int
1.91      kristaps  454: mdoc_tail_alloc(struct mdoc *m, int line, int pos, int tok)
1.17      kristaps  455: {
                    456:        struct mdoc_node *p;
                    457:
1.91      kristaps  458:        p = node_alloc(m, line, pos, tok, MDOC_TAIL);
1.73      kristaps  459:        if (NULL == p)
                    460:                return(0);
1.102     kristaps  461:        if ( ! node_append(m, p))
                    462:                return(0);
                    463:        m->next = MDOC_NEXT_CHILD;
                    464:        return(1);
1.17      kristaps  465: }
                    466:
                    467:
1.23      kristaps  468: int
1.91      kristaps  469: mdoc_head_alloc(struct mdoc *m, int line, int pos, int tok)
1.1       kristaps  470: {
                    471:        struct mdoc_node *p;
                    472:
1.91      kristaps  473:        assert(m->first);
                    474:        assert(m->last);
1.1       kristaps  475:
1.91      kristaps  476:        p = node_alloc(m, line, pos, tok, MDOC_HEAD);
1.73      kristaps  477:        if (NULL == p)
                    478:                return(0);
1.102     kristaps  479:        if ( ! node_append(m, p))
                    480:                return(0);
                    481:        m->next = MDOC_NEXT_CHILD;
                    482:        return(1);
1.1       kristaps  483: }
                    484:
                    485:
1.23      kristaps  486: int
1.91      kristaps  487: mdoc_body_alloc(struct mdoc *m, int line, int pos, int tok)
1.1       kristaps  488: {
                    489:        struct mdoc_node *p;
                    490:
1.91      kristaps  491:        p = node_alloc(m, line, pos, tok, MDOC_BODY);
1.73      kristaps  492:        if (NULL == p)
                    493:                return(0);
1.102     kristaps  494:        if ( ! node_append(m, p))
                    495:                return(0);
                    496:        m->next = MDOC_NEXT_CHILD;
                    497:        return(1);
1.1       kristaps  498: }
                    499:
                    500:
1.23      kristaps  501: int
1.91      kristaps  502: mdoc_block_alloc(struct mdoc *m, int line, int pos,
1.53      kristaps  503:                int tok, struct mdoc_arg *args)
1.1       kristaps  504: {
                    505:        struct mdoc_node *p;
                    506:
1.91      kristaps  507:        p = node_alloc(m, line, pos, tok, MDOC_BLOCK);
1.73      kristaps  508:        if (NULL == p)
                    509:                return(0);
1.77      kristaps  510:        p->args = args;
                    511:        if (p->args)
1.53      kristaps  512:                (args->refcnt)++;
1.102     kristaps  513:        if ( ! node_append(m, p))
                    514:                return(0);
                    515:        m->next = MDOC_NEXT_CHILD;
                    516:        return(1);
1.1       kristaps  517: }
                    518:
                    519:
1.23      kristaps  520: int
1.91      kristaps  521: mdoc_elem_alloc(struct mdoc *m, int line, int pos,
1.53      kristaps  522:                int tok, struct mdoc_arg *args)
1.1       kristaps  523: {
                    524:        struct mdoc_node *p;
                    525:
1.91      kristaps  526:        p = node_alloc(m, line, pos, tok, MDOC_ELEM);
1.73      kristaps  527:        if (NULL == p)
                    528:                return(0);
1.77      kristaps  529:        p->args = args;
                    530:        if (p->args)
1.53      kristaps  531:                (args->refcnt)++;
1.102     kristaps  532:        if ( ! node_append(m, p))
                    533:                return(0);
                    534:        m->next = MDOC_NEXT_CHILD;
                    535:        return(1);
1.1       kristaps  536: }
                    537:
                    538:
1.91      kristaps  539: static int
                    540: pstring(struct mdoc *m, int line, int pos, const char *p, size_t len)
1.1       kristaps  541: {
1.91      kristaps  542:        struct mdoc_node *n;
                    543:        size_t            sv;
1.1       kristaps  544:
1.91      kristaps  545:        n = node_alloc(m, line, pos, -1, MDOC_TEXT);
                    546:        if (NULL == n)
                    547:                return(mdoc_nerr(m, m->last, EMALLOC));
                    548:
                    549:        n->string = malloc(len + 1);
                    550:        if (NULL == n->string) {
                    551:                free(n);
                    552:                return(mdoc_nerr(m, m->last, EMALLOC));
1.73      kristaps  553:        }
1.88      kristaps  554:
1.91      kristaps  555:        sv = strlcpy(n->string, p, len + 1);
                    556:
                    557:        /* Prohibit truncation. */
                    558:        assert(sv < len + 1);
                    559:
1.101     kristaps  560:        if ( ! node_append(m, n))
                    561:                return(0);
                    562:        m->next = MDOC_NEXT_SIBLING;
                    563:        return(1);
1.91      kristaps  564: }
                    565:
                    566:
                    567: int
                    568: mdoc_word_alloc(struct mdoc *m, int line, int pos, const char *p)
                    569: {
                    570:
                    571:        return(pstring(m, line, pos, p, strlen(p)));
1.1       kristaps  572: }
                    573:
                    574:
1.53      kristaps  575: void
                    576: mdoc_node_free(struct mdoc_node *p)
1.1       kristaps  577: {
                    578:
1.86      kristaps  579:        if (p->parent)
                    580:                p->parent->nchild--;
1.53      kristaps  581:        if (p->string)
                    582:                free(p->string);
                    583:        if (p->args)
                    584:                mdoc_argv_free(p->args);
1.1       kristaps  585:        free(p);
                    586: }
                    587:
                    588:
1.53      kristaps  589: void
                    590: mdoc_node_freelist(struct mdoc_node *p)
1.1       kristaps  591: {
                    592:
1.53      kristaps  593:        if (p->child)
                    594:                mdoc_node_freelist(p->child);
                    595:        if (p->next)
                    596:                mdoc_node_freelist(p->next);
1.1       kristaps  597:
1.86      kristaps  598:        assert(0 == p->nchild);
1.53      kristaps  599:        mdoc_node_free(p);
1.1       kristaps  600: }
                    601:
                    602:
1.53      kristaps  603: /*
                    604:  * Parse free-form text, that is, a line that does not begin with the
                    605:  * control character.
                    606:  */
                    607: static int
1.68      kristaps  608: parsetext(struct mdoc *m, int line, char *buf)
1.1       kristaps  609: {
1.91      kristaps  610:        int              i, j;
1.1       kristaps  611:
1.85      kristaps  612:        if (SEC_NONE == m->lastnamed)
1.88      kristaps  613:                return(mdoc_perr(m, line, 0, ETEXTPROL));
1.91      kristaps  614:
                    615:        /*
                    616:         * If in literal mode, then pass the buffer directly to the
                    617:         * back-end, as it should be preserved as a single term.
                    618:         */
                    619:
1.101     kristaps  620:        if (MDOC_LITERAL & m->flags)
                    621:                return(mdoc_word_alloc(m, line, 0, buf));
1.91      kristaps  622:
                    623:        /* Disallow blank/white-space lines in non-literal mode. */
1.1       kristaps  624:
1.91      kristaps  625:        for (i = 0; ' ' == buf[i]; i++)
                    626:                /* Skip leading whitespace. */ ;
                    627:        if (0 == buf[i])
1.88      kristaps  628:                return(mdoc_perr(m, line, 0, ENOBLANK));
1.68      kristaps  629:
1.91      kristaps  630:        /*
                    631:         * Break apart a free-form line into tokens.  Spaces are
                    632:         * stripped out of the input.
                    633:         */
                    634:
                    635:        for (j = i; buf[i]; i++) {
                    636:                if (' ' != buf[i])
                    637:                        continue;
                    638:
                    639:                /* Escaped whitespace. */
                    640:                if (i && ' ' == buf[i] && '\\' == buf[i - 1])
                    641:                        continue;
                    642:
                    643:                buf[i++] = 0;
                    644:                if ( ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
                    645:                        return(0);
                    646:
                    647:                for ( ; ' ' == buf[i]; i++)
                    648:                        /* Skip trailing whitespace. */ ;
                    649:
                    650:                j = i;
                    651:                if (0 == buf[i])
                    652:                        break;
                    653:        }
                    654:
                    655:        if (j != i && ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
1.53      kristaps  656:                return(0);
1.1       kristaps  657:
1.68      kristaps  658:        m->next = MDOC_NEXT_SIBLING;
1.53      kristaps  659:        return(1);
1.1       kristaps  660: }
                    661:
                    662:
1.91      kristaps  663:
                    664:
1.58      kristaps  665: static int
                    666: macrowarn(struct mdoc *m, int ln, const char *buf)
                    667: {
                    668:        if ( ! (MDOC_IGN_MACRO & m->pflags))
1.96      kristaps  669:                return(mdoc_verr(m, ln, 0,
1.73      kristaps  670:                                "unknown macro: %s%s",
1.59      kristaps  671:                                buf, strlen(buf) > 3 ? "..." : ""));
1.96      kristaps  672:        return(mdoc_vwarn(m, ln, 0, "unknown macro: %s%s",
1.59      kristaps  673:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  674: }
                    675:
                    676:
1.53      kristaps  677: /*
                    678:  * Parse a macro line, that is, a line beginning with the control
                    679:  * character.
                    680:  */
                    681: int
                    682: parsemacro(struct mdoc *m, int ln, char *buf)
1.1       kristaps  683: {
1.103     kristaps  684:        int               i, j, c;
1.53      kristaps  685:        char              mac[5];
1.1       kristaps  686:
1.81      kristaps  687:        /* Empty lines are ignored. */
1.63      kristaps  688:
                    689:        if (0 == buf[1])
                    690:                return(1);
                    691:
1.100     kristaps  692:        i = 1;
                    693:
                    694:        /* Accept whitespace after the initial control char. */
                    695:
                    696:        if (' ' == buf[i]) {
                    697:                i++;
1.65      kristaps  698:                while (buf[i] && ' ' == buf[i])
1.63      kristaps  699:                        i++;
                    700:                if (0 == buf[i])
                    701:                        return(1);
                    702:        }
1.1       kristaps  703:
1.53      kristaps  704:        /* Copy the first word into a nil-terminated buffer. */
1.1       kristaps  705:
1.100     kristaps  706:        for (j = 0; j < 4; j++, i++) {
                    707:                if (0 == (mac[j] = buf[i]))
1.53      kristaps  708:                        break;
1.65      kristaps  709:                else if (' ' == buf[i])
1.53      kristaps  710:                        break;
1.104     kristaps  711:
                    712:                /* Check for invalid characters. */
                    713:
                    714:                if (isgraph((u_char)buf[i]))
                    715:                        continue;
                    716:                return(mdoc_perr(m, ln, i, EPRINT));
1.53      kristaps  717:        }
1.1       kristaps  718:
1.100     kristaps  719:        mac[j] = 0;
1.1       kristaps  720:
1.100     kristaps  721:        if (j == 4 || j < 2) {
1.58      kristaps  722:                if ( ! macrowarn(m, ln, mac))
                    723:                        goto err;
                    724:                return(1);
1.53      kristaps  725:        }
                    726:
1.105     kristaps  727:        if (MDOC_MAX == (c = mdoc_hash_find(mac))) {
1.58      kristaps  728:                if ( ! macrowarn(m, ln, mac))
                    729:                        goto err;
                    730:                return(1);
1.53      kristaps  731:        }
1.1       kristaps  732:
1.53      kristaps  733:        /* The macro is sane.  Jump to the next word. */
1.1       kristaps  734:
1.65      kristaps  735:        while (buf[i] && ' ' == buf[i])
1.53      kristaps  736:                i++;
1.1       kristaps  737:
1.98      kristaps  738:        /*
                    739:         * Begin recursive parse sequence.  Since we're at the start of
                    740:         * the line, we don't need to do callable/parseable checks.
                    741:         */
1.103     kristaps  742:        if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
1.53      kristaps  743:                goto err;
1.1       kristaps  744:
1.53      kristaps  745:        return(1);
1.1       kristaps  746:
1.53      kristaps  747: err:   /* Error out. */
1.1       kristaps  748:
1.53      kristaps  749:        m->flags |= MDOC_HALT;
                    750:        return(0);
1.1       kristaps  751: }
1.100     kristaps  752:
                    753:

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