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Annotation of mandoc/read.c, Revision 1.25

1.25    ! kristaps    1: /*     $Id: read.c,v 1.24 2011/10/06 22:29:12 kristaps Exp $ */
1.1       kristaps    2: /*
                      3:  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
                      4:  * Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>
                      5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
                      7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
                      9:  *
                     10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     17:  */
1.11      kristaps   18: #ifdef HAVE_CONFIG_H
                     19: #include "config.h"
                     20: #endif
                     21:
1.15      kristaps   22: #ifdef HAVE_MMAP
                     23: # include <sys/stat.h>
                     24: # include <sys/mman.h>
                     25: #endif
1.1       kristaps   26:
                     27: #include <assert.h>
                     28: #include <ctype.h>
                     29: #include <fcntl.h>
1.3       kristaps   30: #include <stdarg.h>
1.1       kristaps   31: #include <stdio.h>
                     32: #include <stdlib.h>
                     33: #include <string.h>
                     34: #include <unistd.h>
                     35:
                     36: #include "mandoc.h"
1.3       kristaps   37: #include "libmandoc.h"
1.1       kristaps   38: #include "mdoc.h"
                     39: #include "man.h"
                     40:
                     41: #ifndef MAP_FILE
                     42: #define        MAP_FILE        0
                     43: #endif
                     44:
                     45: #define        REPARSE_LIMIT   1000
                     46:
                     47: struct buf {
                     48:        char             *buf; /* binary input buffer */
                     49:        size_t            sz; /* size of binary buffer */
                     50: };
                     51:
                     52: struct mparse {
                     53:        enum mandoclevel  file_status; /* status of current parse */
1.3       kristaps   54:        enum mandoclevel  wlevel; /* ignore messages below this */
1.1       kristaps   55:        int               line; /* line number in the file */
                     56:        enum mparset      inttype; /* which parser to use */
                     57:        struct man       *pman; /* persistent man parser */
                     58:        struct mdoc      *pmdoc; /* persistent mdoc parser */
                     59:        struct man       *man; /* man parser */
                     60:        struct mdoc      *mdoc; /* mdoc parser */
                     61:        struct roff      *roff; /* roff parser (!NULL) */
                     62:        int               reparse_count; /* finite interp. stack */
                     63:        mandocmsg         mmsg; /* warning/error message handler */
                     64:        void             *arg; /* argument to mmsg */
1.3       kristaps   65:        const char       *file;
1.24      kristaps   66:        struct buf       *secondary;
1.1       kristaps   67: };
                     68:
                     69: static void      resize_buf(struct buf *, size_t);
                     70: static void      mparse_buf_r(struct mparse *, struct buf, int);
                     71: static void      mparse_readfd_r(struct mparse *, int, const char *, int);
                     72: static void      pset(const char *, int, struct mparse *);
                     73: static void      pdesc(struct mparse *, const char *, int);
                     74: static int       read_whole_file(const char *, int, struct buf *, int *);
                     75: static void      mparse_end(struct mparse *);
                     76:
1.3       kristaps   77: static const enum mandocerr    mandoclimits[MANDOCLEVEL_MAX] = {
                     78:        MANDOCERR_OK,
                     79:        MANDOCERR_WARNING,
                     80:        MANDOCERR_WARNING,
                     81:        MANDOCERR_ERROR,
                     82:        MANDOCERR_FATAL,
                     83:        MANDOCERR_MAX,
                     84:        MANDOCERR_MAX
                     85: };
                     86:
1.7       kristaps   87: static const char * const      mandocerrs[MANDOCERR_MAX] = {
                     88:        "ok",
                     89:
                     90:        "generic warning",
                     91:
                     92:        /* related to the prologue */
                     93:        "no title in document",
                     94:        "document title should be all caps",
                     95:        "unknown manual section",
                     96:        "date missing, using today's date",
                     97:        "cannot parse date, using it verbatim",
                     98:        "prologue macros out of order",
                     99:        "duplicate prologue macro",
                    100:        "macro not allowed in prologue",
                    101:        "macro not allowed in body",
                    102:
                    103:        /* related to document structure */
                    104:        ".so is fragile, better use ln(1)",
                    105:        "NAME section must come first",
                    106:        "bad NAME section contents",
                    107:        "manual name not yet set",
                    108:        "sections out of conventional order",
                    109:        "duplicate section name",
                    110:        "section not in conventional manual section",
                    111:
                    112:        /* related to macros and nesting */
                    113:        "skipping obsolete macro",
                    114:        "skipping paragraph macro",
                    115:        "skipping no-space macro",
                    116:        "blocks badly nested",
                    117:        "child violates parent syntax",
                    118:        "nested displays are not portable",
                    119:        "already in literal mode",
                    120:        "line scope broken",
                    121:
                    122:        /* related to missing macro arguments */
                    123:        "skipping empty macro",
                    124:        "argument count wrong",
                    125:        "missing display type",
                    126:        "list type must come first",
                    127:        "tag lists require a width argument",
                    128:        "missing font type",
                    129:        "skipping end of block that is not open",
                    130:
                    131:        /* related to bad macro arguments */
                    132:        "skipping argument",
                    133:        "duplicate argument",
                    134:        "duplicate display type",
                    135:        "duplicate list type",
                    136:        "unknown AT&T UNIX version",
                    137:        "bad Boolean value",
                    138:        "unknown font",
                    139:        "unknown standard specifier",
                    140:        "bad width argument",
                    141:
                    142:        /* related to plain text */
                    143:        "blank line in non-literal context",
                    144:        "tab in non-literal context",
                    145:        "end of line whitespace",
                    146:        "bad comment style",
1.12      kristaps  147:        "bad escape sequence",
1.7       kristaps  148:        "unterminated quoted string",
1.16      kristaps  149:
                    150:        /* related to equations */
                    151:        "unexpected literal in equation",
1.7       kristaps  152:
                    153:        "generic error",
1.17      kristaps  154:
                    155:        /* related to equations */
1.20      kristaps  156:        "unexpected equation scope closure",
                    157:        "equation scope open on exit",
1.21      kristaps  158:        "overlapping equation scopes",
                    159:        "unexpected end of equation",
                    160:        "equation syntax error",
1.7       kristaps  161:
                    162:        /* related to tables */
                    163:        "bad table syntax",
                    164:        "bad table option",
                    165:        "bad table layout",
                    166:        "no table layout cells specified",
                    167:        "no table data cells specified",
                    168:        "ignore data in cell",
                    169:        "data block still open",
                    170:        "ignoring extra data cells",
                    171:
                    172:        "input stack limit exceeded, infinite loop?",
                    173:        "skipping bad character",
                    174:        "escaped character not allowed in a name",
                    175:        "skipping text before the first section header",
                    176:        "skipping unknown macro",
                    177:        "NOT IMPLEMENTED, please use groff: skipping request",
                    178:        "argument count wrong",
                    179:        "skipping end of block that is not open",
                    180:        "missing end of block",
                    181:        "scope open on exit",
                    182:        "uname(3) system call failed",
                    183:        "macro requires line argument(s)",
                    184:        "macro requires body argument(s)",
                    185:        "macro requires argument(s)",
                    186:        "missing list type",
                    187:        "line argument(s) will be lost",
                    188:        "body argument(s) will be lost",
                    189:
                    190:        "generic fatal error",
                    191:
                    192:        "not a manual",
                    193:        "column syntax is inconsistent",
                    194:        "NOT IMPLEMENTED: .Bd -file",
                    195:        "line scope broken, syntax violated",
                    196:        "argument count wrong, violates syntax",
                    197:        "child violates parent syntax",
                    198:        "argument count wrong, violates syntax",
                    199:        "NOT IMPLEMENTED: .so with absolute path or \"..\"",
                    200:        "no document body",
                    201:        "no document prologue",
                    202:        "static buffer exhausted",
                    203: };
                    204:
                    205: static const char * const      mandoclevels[MANDOCLEVEL_MAX] = {
                    206:        "SUCCESS",
                    207:        "RESERVED",
                    208:        "WARNING",
                    209:        "ERROR",
                    210:        "FATAL",
                    211:        "BADARG",
                    212:        "SYSERR"
                    213: };
                    214:
1.1       kristaps  215: static void
                    216: resize_buf(struct buf *buf, size_t initial)
                    217: {
                    218:
                    219:        buf->sz = buf->sz > initial/2 ? 2 * buf->sz : initial;
                    220:        buf->buf = mandoc_realloc(buf->buf, buf->sz);
                    221: }
                    222:
                    223: static void
                    224: pset(const char *buf, int pos, struct mparse *curp)
                    225: {
                    226:        int              i;
                    227:
                    228:        /*
                    229:         * Try to intuit which kind of manual parser should be used.  If
                    230:         * passed in by command-line (-man, -mdoc), then use that
                    231:         * explicitly.  If passed as -mandoc, then try to guess from the
                    232:         * line: either skip dot-lines, use -mdoc when finding `.Dt', or
                    233:         * default to -man, which is more lenient.
                    234:         *
                    235:         * Separate out pmdoc/pman from mdoc/man: the first persists
                    236:         * through all parsers, while the latter is used per-parse.
                    237:         */
                    238:
                    239:        if ('.' == buf[0] || '\'' == buf[0]) {
                    240:                for (i = 1; buf[i]; i++)
                    241:                        if (' ' != buf[i] && '\t' != buf[i])
                    242:                                break;
                    243:                if ('\0' == buf[i])
                    244:                        return;
                    245:        }
                    246:
                    247:        switch (curp->inttype) {
                    248:        case (MPARSE_MDOC):
                    249:                if (NULL == curp->pmdoc)
1.18      kristaps  250:                        curp->pmdoc = mdoc_alloc(curp->roff, curp);
1.1       kristaps  251:                assert(curp->pmdoc);
                    252:                curp->mdoc = curp->pmdoc;
                    253:                return;
                    254:        case (MPARSE_MAN):
                    255:                if (NULL == curp->pman)
1.18      kristaps  256:                        curp->pman = man_alloc(curp->roff, curp);
1.1       kristaps  257:                assert(curp->pman);
                    258:                curp->man = curp->pman;
                    259:                return;
                    260:        default:
                    261:                break;
                    262:        }
                    263:
                    264:        if (pos >= 3 && 0 == memcmp(buf, ".Dd", 3))  {
                    265:                if (NULL == curp->pmdoc)
1.18      kristaps  266:                        curp->pmdoc = mdoc_alloc(curp->roff, curp);
1.1       kristaps  267:                assert(curp->pmdoc);
                    268:                curp->mdoc = curp->pmdoc;
                    269:                return;
                    270:        }
                    271:
                    272:        if (NULL == curp->pman)
1.18      kristaps  273:                curp->pman = man_alloc(curp->roff, curp);
1.1       kristaps  274:        assert(curp->pman);
                    275:        curp->man = curp->pman;
                    276: }
                    277:
                    278: /*
                    279:  * Main parse routine for an opened file.  This is called for each
                    280:  * opened file and simply loops around the full input file, possibly
                    281:  * nesting (i.e., with `so').
                    282:  */
                    283: static void
                    284: mparse_buf_r(struct mparse *curp, struct buf blk, int start)
                    285: {
                    286:        const struct tbl_span   *span;
                    287:        struct buf       ln;
                    288:        enum rofferr     rr;
                    289:        int              i, of, rc;
                    290:        int              pos; /* byte number in the ln buffer */
                    291:        int              lnn; /* line number in the real file */
                    292:        unsigned char    c;
                    293:
                    294:        memset(&ln, 0, sizeof(struct buf));
                    295:
                    296:        lnn = curp->line;
                    297:        pos = 0;
                    298:
                    299:        for (i = 0; i < (int)blk.sz; ) {
                    300:                if (0 == pos && '\0' == blk.buf[i])
                    301:                        break;
                    302:
                    303:                if (start) {
                    304:                        curp->line = lnn;
                    305:                        curp->reparse_count = 0;
                    306:                }
                    307:
                    308:                while (i < (int)blk.sz && (start || '\0' != blk.buf[i])) {
                    309:
                    310:                        /*
                    311:                         * When finding an unescaped newline character,
                    312:                         * leave the character loop to process the line.
                    313:                         * Skip a preceding carriage return, if any.
                    314:                         */
                    315:
                    316:                        if ('\r' == blk.buf[i] && i + 1 < (int)blk.sz &&
                    317:                            '\n' == blk.buf[i + 1])
                    318:                                ++i;
                    319:                        if ('\n' == blk.buf[i]) {
                    320:                                ++i;
                    321:                                ++lnn;
                    322:                                break;
                    323:                        }
                    324:
                    325:                        /*
                    326:                         * Warn about bogus characters.  If you're using
                    327:                         * non-ASCII encoding, you're screwing your
                    328:                         * readers.  Since I'd rather this not happen,
                    329:                         * I'll be helpful and drop these characters so
                    330:                         * we don't display gibberish.  Note to manual
                    331:                         * writers: use special characters.
                    332:                         */
                    333:
                    334:                        c = (unsigned char) blk.buf[i];
                    335:
                    336:                        if ( ! (isascii(c) &&
                    337:                                        (isgraph(c) || isblank(c)))) {
1.3       kristaps  338:                                mandoc_msg(MANDOCERR_BADCHAR, curp,
1.1       kristaps  339:                                                curp->line, pos, "ignoring byte");
                    340:                                i++;
                    341:                                continue;
                    342:                        }
                    343:
                    344:                        /* Trailing backslash = a plain char. */
                    345:
                    346:                        if ('\\' != blk.buf[i] || i + 1 == (int)blk.sz) {
                    347:                                if (pos >= (int)ln.sz)
                    348:                                        resize_buf(&ln, 256);
                    349:                                ln.buf[pos++] = blk.buf[i++];
                    350:                                continue;
                    351:                        }
                    352:
                    353:                        /*
                    354:                         * Found escape and at least one other character.
                    355:                         * When it's a newline character, skip it.
                    356:                         * When there is a carriage return in between,
                    357:                         * skip that one as well.
                    358:                         */
                    359:
                    360:                        if ('\r' == blk.buf[i + 1] && i + 2 < (int)blk.sz &&
                    361:                            '\n' == blk.buf[i + 2])
                    362:                                ++i;
                    363:                        if ('\n' == blk.buf[i + 1]) {
                    364:                                i += 2;
                    365:                                ++lnn;
                    366:                                continue;
                    367:                        }
                    368:
1.13      kristaps  369:                        if ('"' == blk.buf[i + 1] || '#' == blk.buf[i + 1]) {
1.1       kristaps  370:                                i += 2;
                    371:                                /* Comment, skip to end of line */
                    372:                                for (; i < (int)blk.sz; ++i) {
                    373:                                        if ('\n' == blk.buf[i]) {
                    374:                                                ++i;
                    375:                                                ++lnn;
                    376:                                                break;
                    377:                                        }
                    378:                                }
                    379:
                    380:                                /* Backout trailing whitespaces */
                    381:                                for (; pos > 0; --pos) {
                    382:                                        if (ln.buf[pos - 1] != ' ')
                    383:                                                break;
                    384:                                        if (pos > 2 && ln.buf[pos - 2] == '\\')
                    385:                                                break;
                    386:                                }
                    387:                                break;
                    388:                        }
                    389:
                    390:                        /* Some other escape sequence, copy & cont. */
                    391:
                    392:                        if (pos + 1 >= (int)ln.sz)
                    393:                                resize_buf(&ln, 256);
                    394:
                    395:                        ln.buf[pos++] = blk.buf[i++];
                    396:                        ln.buf[pos++] = blk.buf[i++];
                    397:                }
                    398:
                    399:                if (pos >= (int)ln.sz)
                    400:                        resize_buf(&ln, 256);
                    401:
                    402:                ln.buf[pos] = '\0';
                    403:
                    404:                /*
                    405:                 * A significant amount of complexity is contained by
                    406:                 * the roff preprocessor.  It's line-oriented but can be
                    407:                 * expressed on one line, so we need at times to
                    408:                 * readjust our starting point and re-run it.  The roff
                    409:                 * preprocessor can also readjust the buffers with new
                    410:                 * data, so we pass them in wholesale.
                    411:                 */
                    412:
                    413:                of = 0;
                    414:
1.24      kristaps  415:                /*
                    416:                 * Maintain a lookaside buffer of all parsed lines.  We
                    417:                 * only do this if mparse_keep() has been invoked (the
                    418:                 * buffer may be accessed with mparse_getkeep()).
                    419:                 */
                    420:
                    421:                if (curp->secondary) {
                    422:                        curp->secondary->buf =
                    423:                                mandoc_realloc
                    424:                                (curp->secondary->buf,
                    425:                                 curp->secondary->sz + pos + 2);
                    426:                        memcpy(curp->secondary->buf +
                    427:                                        curp->secondary->sz,
                    428:                                        ln.buf, pos);
                    429:                        curp->secondary->sz += pos;
                    430:                        curp->secondary->buf
                    431:                                [curp->secondary->sz] = '\n';
                    432:                        curp->secondary->sz++;
                    433:                        curp->secondary->buf
                    434:                                [curp->secondary->sz] = '\0';
                    435:                }
1.1       kristaps  436: rerun:
                    437:                rr = roff_parseln
                    438:                        (curp->roff, curp->line,
                    439:                         &ln.buf, &ln.sz, of, &of);
                    440:
                    441:                switch (rr) {
                    442:                case (ROFF_REPARSE):
                    443:                        if (REPARSE_LIMIT >= ++curp->reparse_count)
                    444:                                mparse_buf_r(curp, ln, 0);
                    445:                        else
1.3       kristaps  446:                                mandoc_msg(MANDOCERR_ROFFLOOP, curp,
1.1       kristaps  447:                                        curp->line, pos, NULL);
                    448:                        pos = 0;
                    449:                        continue;
                    450:                case (ROFF_APPEND):
                    451:                        pos = (int)strlen(ln.buf);
                    452:                        continue;
                    453:                case (ROFF_RERUN):
                    454:                        goto rerun;
                    455:                case (ROFF_IGN):
                    456:                        pos = 0;
                    457:                        continue;
                    458:                case (ROFF_ERR):
                    459:                        assert(MANDOCLEVEL_FATAL <= curp->file_status);
                    460:                        break;
                    461:                case (ROFF_SO):
1.24      kristaps  462:                        /*
                    463:                         * We remove `so' clauses from our lookaside
                    464:                         * buffer because we're going to descend into
                    465:                         * the file recursively.
                    466:                         */
1.25    ! kristaps  467:                        if (curp->secondary)
        !           468:                                curp->secondary->sz -= pos + 1;
1.1       kristaps  469:                        mparse_readfd_r(curp, -1, ln.buf + of, 1);
                    470:                        if (MANDOCLEVEL_FATAL <= curp->file_status)
                    471:                                break;
                    472:                        pos = 0;
                    473:                        continue;
                    474:                default:
                    475:                        break;
                    476:                }
                    477:
                    478:                /*
                    479:                 * If we encounter errors in the recursive parse, make
                    480:                 * sure we don't continue parsing.
                    481:                 */
                    482:
                    483:                if (MANDOCLEVEL_FATAL <= curp->file_status)
                    484:                        break;
                    485:
                    486:                /*
                    487:                 * If input parsers have not been allocated, do so now.
1.14      kristaps  488:                 * We keep these instanced between parsers, but set them
1.1       kristaps  489:                 * locally per parse routine since we can use different
                    490:                 * parsers with each one.
                    491:                 */
                    492:
                    493:                if ( ! (curp->man || curp->mdoc))
                    494:                        pset(ln.buf + of, pos - of, curp);
                    495:
                    496:                /*
                    497:                 * Lastly, push down into the parsers themselves.  One
                    498:                 * of these will have already been set in the pset()
                    499:                 * routine.
                    500:                 * If libroff returns ROFF_TBL, then add it to the
                    501:                 * currently open parse.  Since we only get here if
                    502:                 * there does exist data (see tbl_data.c), we're
                    503:                 * guaranteed that something's been allocated.
                    504:                 * Do the same for ROFF_EQN.
                    505:                 */
                    506:
                    507:                rc = -1;
                    508:
                    509:                if (ROFF_TBL == rr)
                    510:                        while (NULL != (span = roff_span(curp->roff))) {
                    511:                                rc = curp->man ?
                    512:                                        man_addspan(curp->man, span) :
                    513:                                        mdoc_addspan(curp->mdoc, span);
                    514:                                if (0 == rc)
                    515:                                        break;
                    516:                        }
                    517:                else if (ROFF_EQN == rr)
                    518:                        rc = curp->mdoc ?
                    519:                                mdoc_addeqn(curp->mdoc,
                    520:                                        roff_eqn(curp->roff)) :
                    521:                                man_addeqn(curp->man,
                    522:                                        roff_eqn(curp->roff));
                    523:                else if (curp->man || curp->mdoc)
                    524:                        rc = curp->man ?
                    525:                                man_parseln(curp->man,
                    526:                                        curp->line, ln.buf, of) :
                    527:                                mdoc_parseln(curp->mdoc,
                    528:                                        curp->line, ln.buf, of);
                    529:
                    530:                if (0 == rc) {
                    531:                        assert(MANDOCLEVEL_FATAL <= curp->file_status);
                    532:                        break;
                    533:                }
                    534:
                    535:                /* Temporary buffers typically are not full. */
                    536:
                    537:                if (0 == start && '\0' == blk.buf[i])
                    538:                        break;
                    539:
                    540:                /* Start the next input line. */
                    541:
                    542:                pos = 0;
                    543:        }
                    544:
                    545:        free(ln.buf);
                    546: }
                    547:
                    548: static void
                    549: pdesc(struct mparse *curp, const char *file, int fd)
                    550: {
                    551:        struct buf       blk;
                    552:        int              with_mmap;
                    553:
                    554:        /*
                    555:         * Run for each opened file; may be called more than once for
                    556:         * each full parse sequence if the opened file is nested (i.e.,
                    557:         * from `so').  Simply sucks in the whole file and moves into
                    558:         * the parse phase for the file.
                    559:         */
                    560:
                    561:        if ( ! read_whole_file(file, fd, &blk, &with_mmap)) {
                    562:                curp->file_status = MANDOCLEVEL_SYSERR;
                    563:                return;
                    564:        }
                    565:
                    566:        /* Line number is per-file. */
                    567:
                    568:        curp->line = 1;
                    569:
                    570:        mparse_buf_r(curp, blk, 1);
                    571:
1.15      kristaps  572: #ifdef HAVE_MMAP
1.1       kristaps  573:        if (with_mmap)
                    574:                munmap(blk.buf, blk.sz);
                    575:        else
1.15      kristaps  576: #endif
1.1       kristaps  577:                free(blk.buf);
                    578: }
                    579:
                    580: static int
                    581: read_whole_file(const char *file, int fd, struct buf *fb, int *with_mmap)
                    582: {
                    583:        size_t           off;
                    584:        ssize_t          ssz;
                    585:
1.15      kristaps  586: #ifdef HAVE_MMAP
                    587:        struct stat      st;
1.1       kristaps  588:        if (-1 == fstat(fd, &st)) {
                    589:                perror(file);
                    590:                return(0);
                    591:        }
                    592:
                    593:        /*
                    594:         * If we're a regular file, try just reading in the whole entry
                    595:         * via mmap().  This is faster than reading it into blocks, and
                    596:         * since each file is only a few bytes to begin with, I'm not
                    597:         * concerned that this is going to tank any machines.
                    598:         */
                    599:
                    600:        if (S_ISREG(st.st_mode)) {
                    601:                if (st.st_size >= (1U << 31)) {
                    602:                        fprintf(stderr, "%s: input too large\n", file);
                    603:                        return(0);
                    604:                }
                    605:                *with_mmap = 1;
                    606:                fb->sz = (size_t)st.st_size;
                    607:                fb->buf = mmap(NULL, fb->sz, PROT_READ,
                    608:                                MAP_FILE|MAP_SHARED, fd, 0);
                    609:                if (fb->buf != MAP_FAILED)
                    610:                        return(1);
                    611:        }
1.15      kristaps  612: #endif
1.1       kristaps  613:
                    614:        /*
                    615:         * If this isn't a regular file (like, say, stdin), then we must
                    616:         * go the old way and just read things in bit by bit.
                    617:         */
                    618:
                    619:        *with_mmap = 0;
                    620:        off = 0;
                    621:        fb->sz = 0;
                    622:        fb->buf = NULL;
                    623:        for (;;) {
                    624:                if (off == fb->sz) {
                    625:                        if (fb->sz == (1U << 31)) {
                    626:                                fprintf(stderr, "%s: input too large\n", file);
                    627:                                break;
                    628:                        }
                    629:                        resize_buf(fb, 65536);
                    630:                }
                    631:                ssz = read(fd, fb->buf + (int)off, fb->sz - off);
                    632:                if (ssz == 0) {
                    633:                        fb->sz = off;
                    634:                        return(1);
                    635:                }
                    636:                if (ssz == -1) {
                    637:                        perror(file);
                    638:                        break;
                    639:                }
                    640:                off += (size_t)ssz;
                    641:        }
                    642:
                    643:        free(fb->buf);
                    644:        fb->buf = NULL;
                    645:        return(0);
                    646: }
                    647:
                    648: static void
                    649: mparse_end(struct mparse *curp)
                    650: {
                    651:
                    652:        if (MANDOCLEVEL_FATAL <= curp->file_status)
                    653:                return;
                    654:
                    655:        if (curp->mdoc && ! mdoc_endparse(curp->mdoc)) {
                    656:                assert(MANDOCLEVEL_FATAL <= curp->file_status);
                    657:                return;
                    658:        }
                    659:
                    660:        if (curp->man && ! man_endparse(curp->man)) {
                    661:                assert(MANDOCLEVEL_FATAL <= curp->file_status);
                    662:                return;
                    663:        }
                    664:
                    665:        if ( ! (curp->man || curp->mdoc)) {
1.6       kristaps  666:                mandoc_msg(MANDOCERR_NOTMANUAL, curp, 1, 0, NULL);
1.1       kristaps  667:                curp->file_status = MANDOCLEVEL_FATAL;
1.6       kristaps  668:                return;
1.1       kristaps  669:        }
                    670:
                    671:        roff_endparse(curp->roff);
                    672: }
                    673:
                    674: static void
                    675: mparse_readfd_r(struct mparse *curp, int fd, const char *file, int re)
                    676: {
                    677:        const char      *svfile;
                    678:
                    679:        if (-1 == fd)
                    680:                if (-1 == (fd = open(file, O_RDONLY, 0))) {
                    681:                        perror(file);
                    682:                        curp->file_status = MANDOCLEVEL_SYSERR;
                    683:                        return;
                    684:                }
                    685:
1.3       kristaps  686:        svfile = curp->file;
                    687:        curp->file = file;
1.1       kristaps  688:
                    689:        pdesc(curp, file, fd);
                    690:
                    691:        if (0 == re && MANDOCLEVEL_FATAL > curp->file_status)
                    692:                mparse_end(curp);
                    693:
                    694:        if (STDIN_FILENO != fd && -1 == close(fd))
                    695:                perror(file);
                    696:
1.3       kristaps  697:        curp->file = svfile;
1.1       kristaps  698: }
                    699:
                    700: enum mandoclevel
                    701: mparse_readfd(struct mparse *curp, int fd, const char *file)
                    702: {
                    703:
                    704:        mparse_readfd_r(curp, fd, file, 0);
                    705:        return(curp->file_status);
                    706: }
                    707:
                    708: struct mparse *
1.4       kristaps  709: mparse_alloc(enum mparset inttype, enum mandoclevel wlevel, mandocmsg mmsg, void *arg)
1.1       kristaps  710: {
                    711:        struct mparse   *curp;
1.10      kristaps  712:
                    713:        assert(wlevel <= MANDOCLEVEL_FATAL);
1.1       kristaps  714:
                    715:        curp = mandoc_calloc(1, sizeof(struct mparse));
                    716:
1.3       kristaps  717:        curp->wlevel = wlevel;
1.1       kristaps  718:        curp->mmsg = mmsg;
                    719:        curp->arg = arg;
                    720:        curp->inttype = inttype;
                    721:
1.18      kristaps  722:        curp->roff = roff_alloc(curp);
1.1       kristaps  723:        return(curp);
                    724: }
                    725:
                    726: void
                    727: mparse_reset(struct mparse *curp)
                    728: {
                    729:
                    730:        roff_reset(curp->roff);
                    731:
                    732:        if (curp->mdoc)
                    733:                mdoc_reset(curp->mdoc);
                    734:        if (curp->man)
                    735:                man_reset(curp->man);
1.24      kristaps  736:        if (curp->secondary)
                    737:                curp->secondary->sz = 0;
1.1       kristaps  738:
                    739:        curp->file_status = MANDOCLEVEL_OK;
                    740:        curp->mdoc = NULL;
                    741:        curp->man = NULL;
                    742: }
                    743:
                    744: void
                    745: mparse_free(struct mparse *curp)
                    746: {
                    747:
                    748:        if (curp->pmdoc)
                    749:                mdoc_free(curp->pmdoc);
                    750:        if (curp->pman)
                    751:                man_free(curp->pman);
                    752:        if (curp->roff)
                    753:                roff_free(curp->roff);
1.24      kristaps  754:        if (curp->secondary)
                    755:                free(curp->secondary->buf);
1.1       kristaps  756:
1.24      kristaps  757:        free(curp->secondary);
1.1       kristaps  758:        free(curp);
                    759: }
                    760:
                    761: void
                    762: mparse_result(struct mparse *curp, struct mdoc **mdoc, struct man **man)
                    763: {
                    764:
1.9       kristaps  765:        if (mdoc)
                    766:                *mdoc = curp->mdoc;
                    767:        if (man)
                    768:                *man = curp->man;
1.3       kristaps  769: }
                    770:
                    771: void
                    772: mandoc_vmsg(enum mandocerr t, struct mparse *m,
                    773:                int ln, int pos, const char *fmt, ...)
                    774: {
                    775:        char             buf[256];
                    776:        va_list          ap;
                    777:
                    778:        va_start(ap, fmt);
                    779:        vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    780:        va_end(ap);
                    781:
                    782:        mandoc_msg(t, m, ln, pos, buf);
                    783: }
                    784:
                    785: void
                    786: mandoc_msg(enum mandocerr er, struct mparse *m,
                    787:                int ln, int col, const char *msg)
                    788: {
                    789:        enum mandoclevel level;
                    790:
                    791:        level = MANDOCLEVEL_FATAL;
                    792:        while (er < mandoclimits[level])
                    793:                level--;
                    794:
                    795:        if (level < m->wlevel)
                    796:                return;
                    797:
1.8       kristaps  798:        if (m->mmsg)
                    799:                (*m->mmsg)(er, level, m->file, ln, col, msg);
1.3       kristaps  800:
                    801:        if (m->file_status < level)
                    802:                m->file_status = level;
1.7       kristaps  803: }
                    804:
                    805: const char *
                    806: mparse_strerror(enum mandocerr er)
                    807: {
                    808:
                    809:        return(mandocerrs[er]);
                    810: }
                    811:
                    812: const char *
                    813: mparse_strlevel(enum mandoclevel lvl)
                    814: {
                    815:        return(mandoclevels[lvl]);
1.24      kristaps  816: }
                    817:
                    818: void
                    819: mparse_keep(struct mparse *p)
                    820: {
                    821:
                    822:        assert(NULL == p->secondary);
                    823:        p->secondary = mandoc_calloc(1, sizeof(struct buf));
                    824: }
                    825:
                    826: const char *
                    827: mparse_getkeep(const struct mparse *p)
                    828: {
                    829:
                    830:        assert(p->secondary);
                    831:        return(p->secondary->sz ? p->secondary->buf : NULL);
1.1       kristaps  832: }

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