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Annotation of mandoc/mdoc.c, Revision 1.112

1.112   ! kristaps    1: /*     $Id: mdoc.c,v 1.111 2009/10/26 07:11:07 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 */
1.107     kristaps   79:        "no description found for library", /* ELIB */
                     80:        "bad child for parent context", /* EBADCHILD */
1.109     kristaps   81:        "list arguments preceding type", /* ENOTYPE */
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 */
1.110     kristaps  119:        "Dx",           "\%Q",          "br",           "sp",
                    120:        /* LINTED */
                    121:        "\%U"
1.1       kristaps  122:        };
                    123:
                    124: const  char *const __mdoc_argnames[MDOC_ARG_MAX] = {
                    125:        "split",                "nosplit",              "ragged",
                    126:        "unfilled",             "literal",              "file",
                    127:        "offset",               "bullet",               "dash",
                    128:        "hyphen",               "item",                 "enum",
                    129:        "tag",                  "diag",                 "hang",
                    130:        "ohang",                "inset",                "column",
                    131:        "width",                "compact",              "std",
1.52      kristaps  132:        "filled",               "words",                "emphasis",
1.108     kristaps  133:        "symbolic",             "nested",               "centered"
1.1       kristaps  134:        };
                    135:
                    136: const  char * const *mdoc_macronames = __mdoc_macronames;
                    137: const  char * const *mdoc_argnames = __mdoc_argnames;
                    138:
1.73      kristaps  139: static void              mdoc_free1(struct mdoc *);
                    140: static int               mdoc_alloc1(struct mdoc *);
                    141: static struct mdoc_node *node_alloc(struct mdoc *, int, int,
                    142:                                int, enum mdoc_type);
                    143: static int               node_append(struct mdoc *,
1.71      kristaps  144:                                struct mdoc_node *);
                    145: static int               parsetext(struct mdoc *, int, char *);
                    146: static int               parsemacro(struct mdoc *, int, char *);
                    147: static int               macrowarn(struct mdoc *, int, const char *);
1.91      kristaps  148: static int               pstring(struct mdoc *, int, int,
                    149:                                const char *, size_t);
1.88      kristaps  150:
1.92      kristaps  151: #ifdef __linux__
                    152: extern size_t            strlcpy(char *, const char *, size_t);
                    153: #endif
                    154:
1.71      kristaps  155:
1.1       kristaps  156: const struct mdoc_node *
1.71      kristaps  157: mdoc_node(const struct mdoc *m)
1.1       kristaps  158: {
                    159:
1.71      kristaps  160:        return(MDOC_HALT & m->flags ? NULL : m->first);
1.1       kristaps  161: }
                    162:
                    163:
1.37      kristaps  164: const struct mdoc_meta *
1.71      kristaps  165: mdoc_meta(const struct mdoc *m)
1.37      kristaps  166: {
                    167:
1.71      kristaps  168:        return(MDOC_HALT & m->flags ? NULL : &m->meta);
1.37      kristaps  169: }
                    170:
                    171:
1.85      kristaps  172: /*
                    173:  * Frees volatile resources (parse tree, meta-data, fields).
                    174:  */
1.73      kristaps  175: static void
                    176: mdoc_free1(struct mdoc *mdoc)
1.67      kristaps  177: {
                    178:
                    179:        if (mdoc->first)
                    180:                mdoc_node_freelist(mdoc->first);
                    181:        if (mdoc->meta.title)
                    182:                free(mdoc->meta.title);
                    183:        if (mdoc->meta.os)
                    184:                free(mdoc->meta.os);
                    185:        if (mdoc->meta.name)
                    186:                free(mdoc->meta.name);
                    187:        if (mdoc->meta.arch)
                    188:                free(mdoc->meta.arch);
                    189:        if (mdoc->meta.vol)
                    190:                free(mdoc->meta.vol);
1.73      kristaps  191: }
                    192:
                    193:
1.85      kristaps  194: /*
                    195:  * Allocate all volatile resources (parse tree, meta-data, fields).
                    196:  */
1.73      kristaps  197: static int
                    198: mdoc_alloc1(struct mdoc *mdoc)
                    199: {
1.67      kristaps  200:
1.112   ! kristaps  201:        memset(&mdoc->meta, 0, sizeof(struct mdoc_meta));
1.67      kristaps  202:        mdoc->flags = 0;
1.85      kristaps  203:        mdoc->lastnamed = mdoc->lastsec = SEC_NONE;
1.70      kristaps  204:        mdoc->last = calloc(1, sizeof(struct mdoc_node));
                    205:        if (NULL == mdoc->last)
1.73      kristaps  206:                return(0);
                    207:
1.70      kristaps  208:        mdoc->first = mdoc->last;
1.67      kristaps  209:        mdoc->last->type = MDOC_ROOT;
                    210:        mdoc->next = MDOC_NEXT_CHILD;
1.73      kristaps  211:        return(1);
                    212: }
                    213:
                    214:
                    215: /*
1.85      kristaps  216:  * Free up volatile resources (see mdoc_free1()) then re-initialises the
                    217:  * data with mdoc_alloc1().  After invocation, parse data has been reset
                    218:  * and the parser is ready for re-invocation on a new tree; however,
                    219:  * cross-parse non-volatile data is kept intact.
1.73      kristaps  220:  */
                    221: int
                    222: mdoc_reset(struct mdoc *mdoc)
                    223: {
                    224:
                    225:        mdoc_free1(mdoc);
                    226:        return(mdoc_alloc1(mdoc));
1.67      kristaps  227: }
                    228:
                    229:
1.68      kristaps  230: /*
1.85      kristaps  231:  * Completely free up all volatile and non-volatile parse resources.
                    232:  * After invocation, the pointer is no longer usable.
1.68      kristaps  233:  */
1.67      kristaps  234: void
1.38      kristaps  235: mdoc_free(struct mdoc *mdoc)
1.34      kristaps  236: {
                    237:
1.73      kristaps  238:        mdoc_free1(mdoc);
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:
1.105     kristaps  256:        mdoc_hash_init();
                    257:
1.1       kristaps  258:        p->data = data;
1.73      kristaps  259:        p->pflags = pflags;
                    260:
1.105     kristaps  261:        if (mdoc_alloc1(p))
1.74      kristaps  262:                return(p);
1.1       kristaps  263:
1.73      kristaps  264:        free(p);
                    265:        return(NULL);
1.1       kristaps  266: }
                    267:
                    268:
1.68      kristaps  269: /*
                    270:  * Climb back up the parse tree, validating open scopes.  Mostly calls
1.85      kristaps  271:  * through to macro_end() in macro.c.
1.68      kristaps  272:  */
1.1       kristaps  273: int
1.72      kristaps  274: mdoc_endparse(struct mdoc *m)
1.20      kristaps  275: {
                    276:
1.72      kristaps  277:        if (MDOC_HALT & m->flags)
1.20      kristaps  278:                return(0);
1.72      kristaps  279:        else if (mdoc_macroend(m))
1.20      kristaps  280:                return(1);
1.72      kristaps  281:        m->flags |= MDOC_HALT;
                    282:        return(0);
1.20      kristaps  283: }
                    284:
                    285:
1.50      kristaps  286: /*
1.53      kristaps  287:  * Main parse routine.  Parses a single line -- really just hands off to
1.85      kristaps  288:  * the macro (parsemacro()) or text parser (parsetext()).
1.50      kristaps  289:  */
1.20      kristaps  290: int
1.53      kristaps  291: mdoc_parseln(struct mdoc *m, int ln, char *buf)
1.1       kristaps  292: {
                    293:
1.53      kristaps  294:        if (MDOC_HALT & m->flags)
1.20      kristaps  295:                return(0);
1.50      kristaps  296:
1.53      kristaps  297:        return('.' == *buf ? parsemacro(m, ln, buf) :
                    298:                        parsetext(m, ln, buf));
1.1       kristaps  299: }
                    300:
                    301:
                    302: int
1.31      kristaps  303: mdoc_verr(struct mdoc *mdoc, int ln, int pos,
                    304:                const char *fmt, ...)
1.1       kristaps  305: {
1.31      kristaps  306:        char             buf[256];
                    307:        va_list          ap;
1.1       kristaps  308:
                    309:        if (NULL == mdoc->cb.mdoc_err)
                    310:                return(0);
1.31      kristaps  311:
                    312:        va_start(ap, fmt);
                    313:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    314:        va_end(ap);
1.88      kristaps  315:
1.31      kristaps  316:        return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
1.1       kristaps  317: }
                    318:
                    319:
                    320: int
1.87      kristaps  321: mdoc_vwarn(struct mdoc *mdoc, int ln, int pos, const char *fmt, ...)
1.1       kristaps  322: {
1.31      kristaps  323:        char             buf[256];
                    324:        va_list          ap;
1.1       kristaps  325:
                    326:        if (NULL == mdoc->cb.mdoc_warn)
                    327:                return(0);
1.31      kristaps  328:
                    329:        va_start(ap, fmt);
                    330:        (void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    331:        va_end(ap);
1.88      kristaps  332:
1.87      kristaps  333:        return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, buf));
1.1       kristaps  334: }
                    335:
                    336:
                    337: int
1.88      kristaps  338: mdoc_err(struct mdoc *m, int line, int pos, int iserr, enum merr type)
1.78      kristaps  339: {
1.89      kristaps  340:        const char      *p;
1.88      kristaps  341:
1.89      kristaps  342:        p = __mdoc_merrnames[(int)type];
1.73      kristaps  343:        assert(p);
1.88      kristaps  344:
                    345:        if (iserr)
                    346:                return(mdoc_verr(m, line, pos, p));
                    347:
                    348:        return(mdoc_vwarn(m, line, pos, p));
                    349: }
                    350:
                    351:
                    352: int
                    353: mdoc_macro(struct mdoc *m, int tok,
                    354:                int ln, int pp, int *pos, char *buf)
                    355: {
1.97      kristaps  356:        /*
                    357:         * If we're in the prologue, deny "body" macros.  Similarly, if
                    358:         * we're in the body, deny prologue calls.
                    359:         */
1.88      kristaps  360:        if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
                    361:                        MDOC_PBODY & m->flags)
                    362:                return(mdoc_perr(m, ln, pp, EPROLBODY));
                    363:        if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
                    364:                        ! (MDOC_PBODY & m->flags))
                    365:                return(mdoc_perr(m, ln, pp, EBODYPROL));
                    366:
                    367:        return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
1.73      kristaps  368: }
                    369:
                    370:
                    371: static int
                    372: node_append(struct mdoc *mdoc, struct mdoc_node *p)
1.1       kristaps  373: {
                    374:
1.25      kristaps  375:        assert(mdoc->last);
                    376:        assert(mdoc->first);
                    377:        assert(MDOC_ROOT != p->type);
1.1       kristaps  378:
1.13      kristaps  379:        switch (mdoc->next) {
                    380:        case (MDOC_NEXT_SIBLING):
1.6       kristaps  381:                mdoc->last->next = p;
                    382:                p->prev = mdoc->last;
1.13      kristaps  383:                p->parent = mdoc->last->parent;
1.1       kristaps  384:                break;
1.13      kristaps  385:        case (MDOC_NEXT_CHILD):
                    386:                mdoc->last->child = p;
1.1       kristaps  387:                p->parent = mdoc->last;
                    388:                break;
                    389:        default:
1.13      kristaps  390:                abort();
                    391:                /* NOTREACHED */
1.1       kristaps  392:        }
                    393:
1.86      kristaps  394:        p->parent->nchild++;
                    395:
1.23      kristaps  396:        if ( ! mdoc_valid_pre(mdoc, p))
                    397:                return(0);
1.68      kristaps  398:        if ( ! mdoc_action_pre(mdoc, p))
                    399:                return(0);
1.27      kristaps  400:
                    401:        switch (p->type) {
                    402:        case (MDOC_HEAD):
                    403:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  404:                p->parent->head = p;
1.27      kristaps  405:                break;
                    406:        case (MDOC_TAIL):
                    407:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  408:                p->parent->tail = p;
1.27      kristaps  409:                break;
                    410:        case (MDOC_BODY):
                    411:                assert(MDOC_BLOCK == p->parent->type);
1.53      kristaps  412:                p->parent->body = p;
1.27      kristaps  413:                break;
                    414:        default:
                    415:                break;
                    416:        }
                    417:
1.1       kristaps  418:        mdoc->last = p;
1.71      kristaps  419:
                    420:        switch (p->type) {
                    421:        case (MDOC_TEXT):
                    422:                if ( ! mdoc_valid_post(mdoc))
                    423:                        return(0);
                    424:                if ( ! mdoc_action_post(mdoc))
                    425:                        return(0);
                    426:                break;
                    427:        default:
                    428:                break;
                    429:        }
                    430:
1.23      kristaps  431:        return(1);
1.1       kristaps  432: }
                    433:
                    434:
1.45      kristaps  435: static struct mdoc_node *
1.91      kristaps  436: node_alloc(struct mdoc *m, int line,
1.73      kristaps  437:                int pos, int tok, enum mdoc_type type)
1.45      kristaps  438: {
1.46      kristaps  439:        struct mdoc_node *p;
                    440:
1.73      kristaps  441:        if (NULL == (p = calloc(1, sizeof(struct mdoc_node)))) {
1.91      kristaps  442:                (void)mdoc_nerr(m, m->last, EMALLOC);
1.73      kristaps  443:                return(NULL);
                    444:        }
                    445:
1.91      kristaps  446:        p->sec = m->lastsec;
1.73      kristaps  447:        p->line = line;
                    448:        p->pos = pos;
                    449:        p->tok = tok;
                    450:        if (MDOC_TEXT != (p->type = type))
                    451:                assert(p->tok >= 0);
1.45      kristaps  452:
1.46      kristaps  453:        return(p);
1.45      kristaps  454: }
                    455:
                    456:
1.23      kristaps  457: int
1.91      kristaps  458: mdoc_tail_alloc(struct mdoc *m, int line, int pos, int tok)
1.17      kristaps  459: {
                    460:        struct mdoc_node *p;
                    461:
1.91      kristaps  462:        p = node_alloc(m, line, pos, tok, MDOC_TAIL);
1.73      kristaps  463:        if (NULL == p)
                    464:                return(0);
1.102     kristaps  465:        if ( ! node_append(m, p))
                    466:                return(0);
                    467:        m->next = MDOC_NEXT_CHILD;
                    468:        return(1);
1.17      kristaps  469: }
                    470:
                    471:
1.23      kristaps  472: int
1.91      kristaps  473: mdoc_head_alloc(struct mdoc *m, int line, int pos, int tok)
1.1       kristaps  474: {
                    475:        struct mdoc_node *p;
                    476:
1.91      kristaps  477:        assert(m->first);
                    478:        assert(m->last);
1.1       kristaps  479:
1.91      kristaps  480:        p = node_alloc(m, line, pos, tok, MDOC_HEAD);
1.73      kristaps  481:        if (NULL == p)
                    482:                return(0);
1.102     kristaps  483:        if ( ! node_append(m, p))
                    484:                return(0);
                    485:        m->next = MDOC_NEXT_CHILD;
                    486:        return(1);
1.1       kristaps  487: }
                    488:
                    489:
1.23      kristaps  490: int
1.91      kristaps  491: mdoc_body_alloc(struct mdoc *m, int line, int pos, int tok)
1.1       kristaps  492: {
                    493:        struct mdoc_node *p;
                    494:
1.91      kristaps  495:        p = node_alloc(m, line, pos, tok, MDOC_BODY);
1.73      kristaps  496:        if (NULL == p)
                    497:                return(0);
1.102     kristaps  498:        if ( ! node_append(m, p))
                    499:                return(0);
                    500:        m->next = MDOC_NEXT_CHILD;
                    501:        return(1);
1.1       kristaps  502: }
                    503:
                    504:
1.23      kristaps  505: int
1.91      kristaps  506: mdoc_block_alloc(struct mdoc *m, int line, int pos,
1.53      kristaps  507:                int tok, struct mdoc_arg *args)
1.1       kristaps  508: {
                    509:        struct mdoc_node *p;
                    510:
1.91      kristaps  511:        p = node_alloc(m, line, pos, tok, MDOC_BLOCK);
1.73      kristaps  512:        if (NULL == p)
                    513:                return(0);
1.77      kristaps  514:        p->args = args;
                    515:        if (p->args)
1.53      kristaps  516:                (args->refcnt)++;
1.102     kristaps  517:        if ( ! node_append(m, p))
                    518:                return(0);
                    519:        m->next = MDOC_NEXT_CHILD;
                    520:        return(1);
1.1       kristaps  521: }
                    522:
                    523:
1.23      kristaps  524: int
1.91      kristaps  525: mdoc_elem_alloc(struct mdoc *m, int line, int pos,
1.53      kristaps  526:                int tok, struct mdoc_arg *args)
1.1       kristaps  527: {
                    528:        struct mdoc_node *p;
                    529:
1.91      kristaps  530:        p = node_alloc(m, line, pos, tok, MDOC_ELEM);
1.73      kristaps  531:        if (NULL == p)
                    532:                return(0);
1.77      kristaps  533:        p->args = args;
                    534:        if (p->args)
1.53      kristaps  535:                (args->refcnt)++;
1.102     kristaps  536:        if ( ! node_append(m, p))
                    537:                return(0);
                    538:        m->next = MDOC_NEXT_CHILD;
                    539:        return(1);
1.1       kristaps  540: }
                    541:
                    542:
1.91      kristaps  543: static int
                    544: pstring(struct mdoc *m, int line, int pos, const char *p, size_t len)
1.1       kristaps  545: {
1.91      kristaps  546:        struct mdoc_node *n;
                    547:        size_t            sv;
1.1       kristaps  548:
1.91      kristaps  549:        n = node_alloc(m, line, pos, -1, MDOC_TEXT);
                    550:        if (NULL == n)
                    551:                return(mdoc_nerr(m, m->last, EMALLOC));
                    552:
                    553:        n->string = malloc(len + 1);
                    554:        if (NULL == n->string) {
                    555:                free(n);
                    556:                return(mdoc_nerr(m, m->last, EMALLOC));
1.73      kristaps  557:        }
1.88      kristaps  558:
1.91      kristaps  559:        sv = strlcpy(n->string, p, len + 1);
                    560:
                    561:        /* Prohibit truncation. */
                    562:        assert(sv < len + 1);
                    563:
1.101     kristaps  564:        if ( ! node_append(m, n))
                    565:                return(0);
                    566:        m->next = MDOC_NEXT_SIBLING;
                    567:        return(1);
1.91      kristaps  568: }
                    569:
                    570:
                    571: int
                    572: mdoc_word_alloc(struct mdoc *m, int line, int pos, const char *p)
                    573: {
                    574:
                    575:        return(pstring(m, line, pos, p, strlen(p)));
1.1       kristaps  576: }
                    577:
                    578:
1.53      kristaps  579: void
                    580: mdoc_node_free(struct mdoc_node *p)
1.1       kristaps  581: {
                    582:
1.86      kristaps  583:        if (p->parent)
                    584:                p->parent->nchild--;
1.53      kristaps  585:        if (p->string)
                    586:                free(p->string);
                    587:        if (p->args)
                    588:                mdoc_argv_free(p->args);
1.1       kristaps  589:        free(p);
                    590: }
                    591:
                    592:
1.53      kristaps  593: void
                    594: mdoc_node_freelist(struct mdoc_node *p)
1.1       kristaps  595: {
                    596:
1.53      kristaps  597:        if (p->child)
                    598:                mdoc_node_freelist(p->child);
                    599:        if (p->next)
                    600:                mdoc_node_freelist(p->next);
1.1       kristaps  601:
1.86      kristaps  602:        assert(0 == p->nchild);
1.53      kristaps  603:        mdoc_node_free(p);
1.1       kristaps  604: }
                    605:
                    606:
1.53      kristaps  607: /*
                    608:  * Parse free-form text, that is, a line that does not begin with the
                    609:  * control character.
                    610:  */
                    611: static int
1.68      kristaps  612: parsetext(struct mdoc *m, int line, char *buf)
1.1       kristaps  613: {
1.91      kristaps  614:        int              i, j;
1.1       kristaps  615:
1.85      kristaps  616:        if (SEC_NONE == m->lastnamed)
1.88      kristaps  617:                return(mdoc_perr(m, line, 0, ETEXTPROL));
1.91      kristaps  618:
                    619:        /*
                    620:         * If in literal mode, then pass the buffer directly to the
                    621:         * back-end, as it should be preserved as a single term.
                    622:         */
                    623:
1.101     kristaps  624:        if (MDOC_LITERAL & m->flags)
                    625:                return(mdoc_word_alloc(m, line, 0, buf));
1.91      kristaps  626:
                    627:        /* Disallow blank/white-space lines in non-literal mode. */
1.1       kristaps  628:
1.91      kristaps  629:        for (i = 0; ' ' == buf[i]; i++)
                    630:                /* Skip leading whitespace. */ ;
                    631:        if (0 == buf[i])
1.88      kristaps  632:                return(mdoc_perr(m, line, 0, ENOBLANK));
1.68      kristaps  633:
1.91      kristaps  634:        /*
                    635:         * Break apart a free-form line into tokens.  Spaces are
                    636:         * stripped out of the input.
                    637:         */
                    638:
                    639:        for (j = i; buf[i]; i++) {
                    640:                if (' ' != buf[i])
                    641:                        continue;
                    642:
                    643:                /* Escaped whitespace. */
                    644:                if (i && ' ' == buf[i] && '\\' == buf[i - 1])
                    645:                        continue;
                    646:
                    647:                buf[i++] = 0;
                    648:                if ( ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
                    649:                        return(0);
                    650:
                    651:                for ( ; ' ' == buf[i]; i++)
                    652:                        /* Skip trailing whitespace. */ ;
                    653:
                    654:                j = i;
                    655:                if (0 == buf[i])
                    656:                        break;
                    657:        }
                    658:
                    659:        if (j != i && ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
1.53      kristaps  660:                return(0);
1.1       kristaps  661:
1.68      kristaps  662:        m->next = MDOC_NEXT_SIBLING;
1.53      kristaps  663:        return(1);
1.1       kristaps  664: }
                    665:
                    666:
1.91      kristaps  667:
1.58      kristaps  668: static int
                    669: macrowarn(struct mdoc *m, int ln, const char *buf)
                    670: {
                    671:        if ( ! (MDOC_IGN_MACRO & m->pflags))
1.96      kristaps  672:                return(mdoc_verr(m, ln, 0,
1.73      kristaps  673:                                "unknown macro: %s%s",
1.59      kristaps  674:                                buf, strlen(buf) > 3 ? "..." : ""));
1.96      kristaps  675:        return(mdoc_vwarn(m, ln, 0, "unknown macro: %s%s",
1.59      kristaps  676:                                buf, strlen(buf) > 3 ? "..." : ""));
1.58      kristaps  677: }
                    678:
                    679:
1.53      kristaps  680: /*
                    681:  * Parse a macro line, that is, a line beginning with the control
                    682:  * character.
                    683:  */
                    684: int
                    685: parsemacro(struct mdoc *m, int ln, char *buf)
1.1       kristaps  686: {
1.103     kristaps  687:        int               i, j, c;
1.53      kristaps  688:        char              mac[5];
1.1       kristaps  689:
1.81      kristaps  690:        /* Empty lines are ignored. */
1.63      kristaps  691:
                    692:        if (0 == buf[1])
                    693:                return(1);
                    694:
1.100     kristaps  695:        i = 1;
                    696:
                    697:        /* Accept whitespace after the initial control char. */
                    698:
                    699:        if (' ' == buf[i]) {
                    700:                i++;
1.65      kristaps  701:                while (buf[i] && ' ' == buf[i])
1.63      kristaps  702:                        i++;
                    703:                if (0 == buf[i])
                    704:                        return(1);
                    705:        }
1.1       kristaps  706:
1.53      kristaps  707:        /* Copy the first word into a nil-terminated buffer. */
1.1       kristaps  708:
1.100     kristaps  709:        for (j = 0; j < 4; j++, i++) {
                    710:                if (0 == (mac[j] = buf[i]))
1.53      kristaps  711:                        break;
1.65      kristaps  712:                else if (' ' == buf[i])
1.53      kristaps  713:                        break;
1.104     kristaps  714:
                    715:                /* Check for invalid characters. */
                    716:
                    717:                if (isgraph((u_char)buf[i]))
                    718:                        continue;
                    719:                return(mdoc_perr(m, ln, i, EPRINT));
1.53      kristaps  720:        }
1.1       kristaps  721:
1.100     kristaps  722:        mac[j] = 0;
1.1       kristaps  723:
1.100     kristaps  724:        if (j == 4 || j < 2) {
1.58      kristaps  725:                if ( ! macrowarn(m, ln, mac))
                    726:                        goto err;
                    727:                return(1);
1.53      kristaps  728:        }
                    729:
1.105     kristaps  730:        if (MDOC_MAX == (c = mdoc_hash_find(mac))) {
1.58      kristaps  731:                if ( ! macrowarn(m, ln, mac))
                    732:                        goto err;
                    733:                return(1);
1.53      kristaps  734:        }
1.1       kristaps  735:
1.53      kristaps  736:        /* The macro is sane.  Jump to the next word. */
1.1       kristaps  737:
1.65      kristaps  738:        while (buf[i] && ' ' == buf[i])
1.53      kristaps  739:                i++;
1.1       kristaps  740:
1.98      kristaps  741:        /*
                    742:         * Begin recursive parse sequence.  Since we're at the start of
                    743:         * the line, we don't need to do callable/parseable checks.
                    744:         */
1.103     kristaps  745:        if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
1.53      kristaps  746:                goto err;
1.1       kristaps  747:
1.53      kristaps  748:        return(1);
1.1       kristaps  749:
1.53      kristaps  750: err:   /* Error out. */
1.1       kristaps  751:
1.53      kristaps  752:        m->flags |= MDOC_HALT;
                    753:        return(0);
1.1       kristaps  754: }
1.100     kristaps  755:
                    756:

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