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Annotation of mandoc/read.c, Revision 1.45

1.45    ! schwarze    1: /*     $Id: read.c,v 1.44 2014/03/19 21:51:20 schwarze Exp $ */
1.1       kristaps    2: /*
                      3:  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.40      schwarze    4:  * Copyright (c) 2010-2014 Ingo Schwarze <schwarze@openbsd.org>
1.42      schwarze    5:  * Copyright (c) 2010, 2012 Joerg Sonnenberger <joerg@netbsd.org>
1.1       kristaps    6:  *
                      7:  * Permission to use, copy, modify, and distribute this software for any
                      8:  * purpose with or without fee is hereby granted, provided that the above
                      9:  * copyright notice and this permission notice appear in all copies.
                     10:  *
                     11:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     12:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     13:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     14:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     15:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     16:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     17:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     18:  */
1.11      kristaps   19: #ifdef HAVE_CONFIG_H
                     20: #include "config.h"
                     21: #endif
                     22:
1.15      kristaps   23: #ifdef HAVE_MMAP
                     24: # include <sys/stat.h>
                     25: # include <sys/mman.h>
                     26: #endif
1.1       kristaps   27:
                     28: #include <assert.h>
                     29: #include <ctype.h>
1.40      schwarze   30: #include <errno.h>
1.1       kristaps   31: #include <fcntl.h>
1.3       kristaps   32: #include <stdarg.h>
1.28      joerg      33: #include <stdint.h>
1.1       kristaps   34: #include <stdio.h>
                     35: #include <stdlib.h>
                     36: #include <string.h>
                     37: #include <unistd.h>
                     38:
                     39: #include "mandoc.h"
1.3       kristaps   40: #include "libmandoc.h"
1.1       kristaps   41: #include "mdoc.h"
                     42: #include "man.h"
1.28      joerg      43: #include "main.h"
1.1       kristaps   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 */
1.44      schwarze   56:        int               options; /* parser options */
1.1       kristaps   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) */
1.45    ! schwarze   62:        char             *sodest; /* filename pointed to by .so */
1.1       kristaps   63:        int               reparse_count; /* finite interp. stack */
                     64:        mandocmsg         mmsg; /* warning/error message handler */
1.3       kristaps   65:        const char       *file;
1.24      kristaps   66:        struct buf       *secondary;
1.29      schwarze   67:        char             *defos; /* default operating system */
1.1       kristaps   68: };
                     69:
                     70: static void      resize_buf(struct buf *, size_t);
                     71: static void      mparse_buf_r(struct mparse *, struct buf, int);
                     72: static void      pset(const char *, int, struct mparse *);
1.40      schwarze   73: static int       read_whole_file(struct mparse *, const char *, int,
                     74:                                struct buf *, int *);
1.1       kristaps   75: static void      mparse_end(struct mparse *);
1.37      schwarze   76: static void      mparse_parse_buffer(struct mparse *, struct buf,
                     77:                        const char *);
1.1       kristaps   78:
1.3       kristaps   79: static const enum mandocerr    mandoclimits[MANDOCLEVEL_MAX] = {
                     80:        MANDOCERR_OK,
                     81:        MANDOCERR_WARNING,
                     82:        MANDOCERR_WARNING,
                     83:        MANDOCERR_ERROR,
                     84:        MANDOCERR_FATAL,
                     85:        MANDOCERR_MAX,
                     86:        MANDOCERR_MAX
                     87: };
                     88:
1.7       kristaps   89: static const char * const      mandocerrs[MANDOCERR_MAX] = {
                     90:        "ok",
                     91:
                     92:        "generic warning",
                     93:
                     94:        /* related to the prologue */
                     95:        "no title in document",
                     96:        "document title should be all caps",
                     97:        "unknown manual section",
1.32      schwarze   98:        "unknown manual volume or arch",
1.7       kristaps   99:        "date missing, using today's date",
                    100:        "cannot parse date, using it verbatim",
                    101:        "prologue macros out of order",
                    102:        "duplicate prologue macro",
                    103:        "macro not allowed in prologue",
                    104:        "macro not allowed in body",
                    105:
                    106:        /* related to document structure */
                    107:        ".so is fragile, better use ln(1)",
                    108:        "NAME section must come first",
                    109:        "bad NAME section contents",
                    110:        "sections out of conventional order",
                    111:        "duplicate section name",
1.39      schwarze  112:        "section header suited to sections 2, 3, and 9 only",
1.7       kristaps  113:
                    114:        /* related to macros and nesting */
                    115:        "skipping obsolete macro",
                    116:        "skipping paragraph macro",
1.31      schwarze  117:        "moving paragraph macro out of list",
1.7       kristaps  118:        "skipping no-space macro",
                    119:        "blocks badly nested",
                    120:        "child violates parent syntax",
                    121:        "nested displays are not portable",
                    122:        "already in literal mode",
                    123:        "line scope broken",
                    124:
                    125:        /* related to missing macro arguments */
                    126:        "skipping empty macro",
                    127:        "argument count wrong",
                    128:        "missing display type",
                    129:        "list type must come first",
                    130:        "tag lists require a width argument",
                    131:        "missing font type",
                    132:        "skipping end of block that is not open",
                    133:
                    134:        /* related to bad macro arguments */
                    135:        "skipping argument",
                    136:        "duplicate argument",
                    137:        "duplicate display type",
                    138:        "duplicate list type",
                    139:        "unknown AT&T UNIX version",
                    140:        "bad Boolean value",
                    141:        "unknown font",
                    142:        "unknown standard specifier",
                    143:        "bad width argument",
                    144:
                    145:        /* related to plain text */
                    146:        "blank line in non-literal context",
                    147:        "tab in non-literal context",
                    148:        "end of line whitespace",
                    149:        "bad comment style",
1.12      kristaps  150:        "bad escape sequence",
1.7       kristaps  151:        "unterminated quoted string",
1.16      kristaps  152:
                    153:        /* related to equations */
                    154:        "unexpected literal in equation",
1.7       kristaps  155:
                    156:        "generic error",
1.17      kristaps  157:
                    158:        /* related to equations */
1.20      kristaps  159:        "unexpected equation scope closure",
                    160:        "equation scope open on exit",
1.21      kristaps  161:        "overlapping equation scopes",
                    162:        "unexpected end of equation",
                    163:        "equation syntax error",
1.7       kristaps  164:
                    165:        /* related to tables */
                    166:        "bad table syntax",
                    167:        "bad table option",
                    168:        "bad table layout",
                    169:        "no table layout cells specified",
                    170:        "no table data cells specified",
                    171:        "ignore data in cell",
                    172:        "data block still open",
                    173:        "ignoring extra data cells",
                    174:
                    175:        "input stack limit exceeded, infinite loop?",
                    176:        "skipping bad character",
                    177:        "escaped character not allowed in a name",
1.30      schwarze  178:        "manual name not yet set",
1.7       kristaps  179:        "skipping text before the first section header",
                    180:        "skipping unknown macro",
                    181:        "NOT IMPLEMENTED, please use groff: skipping request",
                    182:        "argument count wrong",
1.34      schwarze  183:        "skipping column outside column list",
1.7       kristaps  184:        "skipping end of block that is not open",
                    185:        "missing end of block",
                    186:        "scope open on exit",
                    187:        "uname(3) system call failed",
                    188:        "macro requires line argument(s)",
                    189:        "macro requires body argument(s)",
                    190:        "macro requires argument(s)",
1.38      schwarze  191:        "request requires a numeric argument",
1.7       kristaps  192:        "missing list type",
                    193:        "line argument(s) will be lost",
                    194:        "body argument(s) will be lost",
                    195:
                    196:        "generic fatal error",
                    197:
1.40      schwarze  198:        "input too large",
1.7       kristaps  199:        "not a manual",
                    200:        "column syntax is inconsistent",
                    201:        "NOT IMPLEMENTED: .Bd -file",
                    202:        "argument count wrong, violates syntax",
                    203:        "child violates parent syntax",
                    204:        "argument count wrong, violates syntax",
                    205:        "NOT IMPLEMENTED: .so with absolute path or \"..\"",
                    206:        "no document body",
                    207:        "no document prologue",
                    208:        "static buffer exhausted",
1.40      schwarze  209:
                    210:        /* system errors */
                    211:        "cannot open file",
                    212:        "cannot stat file",
                    213:        "cannot read file",
1.7       kristaps  214: };
                    215:
                    216: static const char * const      mandoclevels[MANDOCLEVEL_MAX] = {
                    217:        "SUCCESS",
                    218:        "RESERVED",
                    219:        "WARNING",
                    220:        "ERROR",
                    221:        "FATAL",
                    222:        "BADARG",
                    223:        "SYSERR"
                    224: };
                    225:
1.1       kristaps  226: static void
                    227: resize_buf(struct buf *buf, size_t initial)
                    228: {
                    229:
                    230:        buf->sz = buf->sz > initial/2 ? 2 * buf->sz : initial;
                    231:        buf->buf = mandoc_realloc(buf->buf, buf->sz);
                    232: }
                    233:
                    234: static void
                    235: pset(const char *buf, int pos, struct mparse *curp)
                    236: {
                    237:        int              i;
                    238:
                    239:        /*
                    240:         * Try to intuit which kind of manual parser should be used.  If
                    241:         * passed in by command-line (-man, -mdoc), then use that
                    242:         * explicitly.  If passed as -mandoc, then try to guess from the
                    243:         * line: either skip dot-lines, use -mdoc when finding `.Dt', or
                    244:         * default to -man, which is more lenient.
                    245:         *
                    246:         * Separate out pmdoc/pman from mdoc/man: the first persists
                    247:         * through all parsers, while the latter is used per-parse.
                    248:         */
                    249:
                    250:        if ('.' == buf[0] || '\'' == buf[0]) {
                    251:                for (i = 1; buf[i]; i++)
                    252:                        if (' ' != buf[i] && '\t' != buf[i])
                    253:                                break;
                    254:                if ('\0' == buf[i])
                    255:                        return;
                    256:        }
                    257:
1.44      schwarze  258:        if (MPARSE_MDOC & curp->options) {
1.1       kristaps  259:                if (NULL == curp->pmdoc)
1.44      schwarze  260:                        curp->pmdoc = mdoc_alloc(
                    261:                            curp->roff, curp, curp->defos,
                    262:                            MPARSE_QUICK & curp->options ? 1 : 0);
1.1       kristaps  263:                assert(curp->pmdoc);
                    264:                curp->mdoc = curp->pmdoc;
                    265:                return;
1.44      schwarze  266:        } else if (MPARSE_MAN & curp->options) {
1.1       kristaps  267:                if (NULL == curp->pman)
1.41      schwarze  268:                        curp->pman = man_alloc(curp->roff, curp,
1.44      schwarze  269:                            MPARSE_QUICK & curp->options ? 1 : 0);
1.1       kristaps  270:                assert(curp->pman);
                    271:                curp->man = curp->pman;
                    272:                return;
                    273:        }
                    274:
                    275:        if (pos >= 3 && 0 == memcmp(buf, ".Dd", 3))  {
                    276:                if (NULL == curp->pmdoc)
1.44      schwarze  277:                        curp->pmdoc = mdoc_alloc(
                    278:                            curp->roff, curp, curp->defos,
                    279:                            MPARSE_QUICK & curp->options ? 1 : 0);
1.1       kristaps  280:                assert(curp->pmdoc);
                    281:                curp->mdoc = curp->pmdoc;
                    282:                return;
                    283:        }
                    284:
                    285:        if (NULL == curp->pman)
1.44      schwarze  286:                curp->pman = man_alloc(curp->roff, curp,
                    287:                    MPARSE_QUICK & curp->options ? 1 : 0);
1.1       kristaps  288:        assert(curp->pman);
                    289:        curp->man = curp->pman;
                    290: }
                    291:
                    292: /*
                    293:  * Main parse routine for an opened file.  This is called for each
                    294:  * opened file and simply loops around the full input file, possibly
                    295:  * nesting (i.e., with `so').
                    296:  */
                    297: static void
                    298: mparse_buf_r(struct mparse *curp, struct buf blk, int start)
                    299: {
                    300:        const struct tbl_span   *span;
                    301:        struct buf       ln;
                    302:        enum rofferr     rr;
                    303:        int              i, of, rc;
                    304:        int              pos; /* byte number in the ln buffer */
                    305:        int              lnn; /* line number in the real file */
                    306:        unsigned char    c;
                    307:
                    308:        memset(&ln, 0, sizeof(struct buf));
                    309:
                    310:        lnn = curp->line;
                    311:        pos = 0;
                    312:
                    313:        for (i = 0; i < (int)blk.sz; ) {
                    314:                if (0 == pos && '\0' == blk.buf[i])
                    315:                        break;
                    316:
                    317:                if (start) {
                    318:                        curp->line = lnn;
                    319:                        curp->reparse_count = 0;
                    320:                }
                    321:
                    322:                while (i < (int)blk.sz && (start || '\0' != blk.buf[i])) {
                    323:
                    324:                        /*
                    325:                         * When finding an unescaped newline character,
                    326:                         * leave the character loop to process the line.
                    327:                         * Skip a preceding carriage return, if any.
                    328:                         */
                    329:
                    330:                        if ('\r' == blk.buf[i] && i + 1 < (int)blk.sz &&
                    331:                            '\n' == blk.buf[i + 1])
                    332:                                ++i;
                    333:                        if ('\n' == blk.buf[i]) {
                    334:                                ++i;
                    335:                                ++lnn;
                    336:                                break;
                    337:                        }
                    338:
1.35      schwarze  339:                        /*
                    340:                         * Make sure we have space for at least
                    341:                         * one backslash and one other character
                    342:                         * and the trailing NUL byte.
                    343:                         */
                    344:
                    345:                        if (pos + 2 >= (int)ln.sz)
                    346:                                resize_buf(&ln, 256);
                    347:
1.1       kristaps  348:                        /*
                    349:                         * Warn about bogus characters.  If you're using
                    350:                         * non-ASCII encoding, you're screwing your
                    351:                         * readers.  Since I'd rather this not happen,
1.27      joerg     352:                         * I'll be helpful and replace these characters
                    353:                         * with "?", so we don't display gibberish.
                    354:                         * Note to manual writers: use special characters.
1.1       kristaps  355:                         */
                    356:
                    357:                        c = (unsigned char) blk.buf[i];
                    358:
                    359:                        if ( ! (isascii(c) &&
                    360:                                        (isgraph(c) || isblank(c)))) {
1.3       kristaps  361:                                mandoc_msg(MANDOCERR_BADCHAR, curp,
1.27      joerg     362:                                                curp->line, pos, NULL);
1.1       kristaps  363:                                i++;
1.27      joerg     364:                                ln.buf[pos++] = '?';
1.1       kristaps  365:                                continue;
                    366:                        }
                    367:
                    368:                        /* Trailing backslash = a plain char. */
                    369:
                    370:                        if ('\\' != blk.buf[i] || i + 1 == (int)blk.sz) {
                    371:                                ln.buf[pos++] = blk.buf[i++];
                    372:                                continue;
                    373:                        }
                    374:
                    375:                        /*
                    376:                         * Found escape and at least one other character.
                    377:                         * When it's a newline character, skip it.
                    378:                         * When there is a carriage return in between,
                    379:                         * skip that one as well.
                    380:                         */
                    381:
                    382:                        if ('\r' == blk.buf[i + 1] && i + 2 < (int)blk.sz &&
                    383:                            '\n' == blk.buf[i + 2])
                    384:                                ++i;
                    385:                        if ('\n' == blk.buf[i + 1]) {
                    386:                                i += 2;
                    387:                                ++lnn;
                    388:                                continue;
                    389:                        }
                    390:
1.13      kristaps  391:                        if ('"' == blk.buf[i + 1] || '#' == blk.buf[i + 1]) {
1.1       kristaps  392:                                i += 2;
                    393:                                /* Comment, skip to end of line */
                    394:                                for (; i < (int)blk.sz; ++i) {
                    395:                                        if ('\n' == blk.buf[i]) {
                    396:                                                ++i;
                    397:                                                ++lnn;
                    398:                                                break;
                    399:                                        }
                    400:                                }
                    401:
                    402:                                /* Backout trailing whitespaces */
                    403:                                for (; pos > 0; --pos) {
                    404:                                        if (ln.buf[pos - 1] != ' ')
                    405:                                                break;
                    406:                                        if (pos > 2 && ln.buf[pos - 2] == '\\')
                    407:                                                break;
                    408:                                }
                    409:                                break;
                    410:                        }
                    411:
1.35      schwarze  412:                        /* Catch escaped bogus characters. */
                    413:
                    414:                        c = (unsigned char) blk.buf[i+1];
                    415:
                    416:                        if ( ! (isascii(c) &&
                    417:                                        (isgraph(c) || isblank(c)))) {
                    418:                                mandoc_msg(MANDOCERR_BADCHAR, curp,
                    419:                                                curp->line, pos, NULL);
                    420:                                i += 2;
                    421:                                ln.buf[pos++] = '?';
                    422:                                continue;
                    423:                        }
                    424:
1.1       kristaps  425:                        /* Some other escape sequence, copy & cont. */
                    426:
                    427:                        ln.buf[pos++] = blk.buf[i++];
                    428:                        ln.buf[pos++] = blk.buf[i++];
                    429:                }
                    430:
                    431:                if (pos >= (int)ln.sz)
                    432:                        resize_buf(&ln, 256);
                    433:
                    434:                ln.buf[pos] = '\0';
                    435:
                    436:                /*
                    437:                 * A significant amount of complexity is contained by
                    438:                 * the roff preprocessor.  It's line-oriented but can be
                    439:                 * expressed on one line, so we need at times to
                    440:                 * readjust our starting point and re-run it.  The roff
                    441:                 * preprocessor can also readjust the buffers with new
                    442:                 * data, so we pass them in wholesale.
                    443:                 */
                    444:
                    445:                of = 0;
                    446:
1.24      kristaps  447:                /*
                    448:                 * Maintain a lookaside buffer of all parsed lines.  We
                    449:                 * only do this if mparse_keep() has been invoked (the
                    450:                 * buffer may be accessed with mparse_getkeep()).
                    451:                 */
                    452:
                    453:                if (curp->secondary) {
                    454:                        curp->secondary->buf =
                    455:                                mandoc_realloc
                    456:                                (curp->secondary->buf,
                    457:                                 curp->secondary->sz + pos + 2);
                    458:                        memcpy(curp->secondary->buf +
                    459:                                        curp->secondary->sz,
                    460:                                        ln.buf, pos);
                    461:                        curp->secondary->sz += pos;
                    462:                        curp->secondary->buf
                    463:                                [curp->secondary->sz] = '\n';
                    464:                        curp->secondary->sz++;
                    465:                        curp->secondary->buf
                    466:                                [curp->secondary->sz] = '\0';
                    467:                }
1.1       kristaps  468: rerun:
                    469:                rr = roff_parseln
                    470:                        (curp->roff, curp->line,
                    471:                         &ln.buf, &ln.sz, of, &of);
                    472:
                    473:                switch (rr) {
                    474:                case (ROFF_REPARSE):
                    475:                        if (REPARSE_LIMIT >= ++curp->reparse_count)
                    476:                                mparse_buf_r(curp, ln, 0);
                    477:                        else
1.3       kristaps  478:                                mandoc_msg(MANDOCERR_ROFFLOOP, curp,
1.1       kristaps  479:                                        curp->line, pos, NULL);
                    480:                        pos = 0;
                    481:                        continue;
                    482:                case (ROFF_APPEND):
                    483:                        pos = (int)strlen(ln.buf);
                    484:                        continue;
                    485:                case (ROFF_RERUN):
                    486:                        goto rerun;
                    487:                case (ROFF_IGN):
                    488:                        pos = 0;
                    489:                        continue;
                    490:                case (ROFF_ERR):
                    491:                        assert(MANDOCLEVEL_FATAL <= curp->file_status);
                    492:                        break;
                    493:                case (ROFF_SO):
1.45    ! schwarze  494:                        if (0 == (MPARSE_SO & curp->options) &&
        !           495:                            (i >= (int)blk.sz || '\0' == blk.buf[i])) {
        !           496:                                curp->sodest = mandoc_strdup(ln.buf + of);
        !           497:                                free(ln.buf);
        !           498:                                return;
        !           499:                        }
1.24      kristaps  500:                        /*
                    501:                         * We remove `so' clauses from our lookaside
                    502:                         * buffer because we're going to descend into
                    503:                         * the file recursively.
                    504:                         */
1.25      kristaps  505:                        if (curp->secondary)
                    506:                                curp->secondary->sz -= pos + 1;
1.36      schwarze  507:                        mparse_readfd(curp, -1, ln.buf + of);
1.1       kristaps  508:                        if (MANDOCLEVEL_FATAL <= curp->file_status)
                    509:                                break;
                    510:                        pos = 0;
                    511:                        continue;
                    512:                default:
                    513:                        break;
                    514:                }
                    515:
                    516:                /*
                    517:                 * If we encounter errors in the recursive parse, make
                    518:                 * sure we don't continue parsing.
                    519:                 */
                    520:
                    521:                if (MANDOCLEVEL_FATAL <= curp->file_status)
                    522:                        break;
                    523:
                    524:                /*
                    525:                 * If input parsers have not been allocated, do so now.
1.14      kristaps  526:                 * We keep these instanced between parsers, but set them
1.1       kristaps  527:                 * locally per parse routine since we can use different
                    528:                 * parsers with each one.
                    529:                 */
                    530:
                    531:                if ( ! (curp->man || curp->mdoc))
                    532:                        pset(ln.buf + of, pos - of, curp);
                    533:
                    534:                /*
                    535:                 * Lastly, push down into the parsers themselves.  One
                    536:                 * of these will have already been set in the pset()
                    537:                 * routine.
                    538:                 * If libroff returns ROFF_TBL, then add it to the
                    539:                 * currently open parse.  Since we only get here if
                    540:                 * there does exist data (see tbl_data.c), we're
                    541:                 * guaranteed that something's been allocated.
                    542:                 * Do the same for ROFF_EQN.
                    543:                 */
                    544:
                    545:                rc = -1;
                    546:
                    547:                if (ROFF_TBL == rr)
                    548:                        while (NULL != (span = roff_span(curp->roff))) {
                    549:                                rc = curp->man ?
                    550:                                        man_addspan(curp->man, span) :
                    551:                                        mdoc_addspan(curp->mdoc, span);
                    552:                                if (0 == rc)
                    553:                                        break;
                    554:                        }
                    555:                else if (ROFF_EQN == rr)
                    556:                        rc = curp->mdoc ?
                    557:                                mdoc_addeqn(curp->mdoc,
                    558:                                        roff_eqn(curp->roff)) :
                    559:                                man_addeqn(curp->man,
                    560:                                        roff_eqn(curp->roff));
                    561:                else if (curp->man || curp->mdoc)
                    562:                        rc = curp->man ?
                    563:                                man_parseln(curp->man,
                    564:                                        curp->line, ln.buf, of) :
                    565:                                mdoc_parseln(curp->mdoc,
                    566:                                        curp->line, ln.buf, of);
                    567:
                    568:                if (0 == rc) {
                    569:                        assert(MANDOCLEVEL_FATAL <= curp->file_status);
                    570:                        break;
1.41      schwarze  571:                } else if (2 == rc)
                    572:                        break;
1.1       kristaps  573:
                    574:                /* Temporary buffers typically are not full. */
                    575:
                    576:                if (0 == start && '\0' == blk.buf[i])
                    577:                        break;
                    578:
                    579:                /* Start the next input line. */
                    580:
                    581:                pos = 0;
                    582:        }
                    583:
                    584:        free(ln.buf);
                    585: }
                    586:
                    587: static int
1.40      schwarze  588: read_whole_file(struct mparse *curp, const char *file, int fd,
                    589:                struct buf *fb, int *with_mmap)
1.1       kristaps  590: {
                    591:        size_t           off;
                    592:        ssize_t          ssz;
                    593:
1.15      kristaps  594: #ifdef HAVE_MMAP
                    595:        struct stat      st;
1.1       kristaps  596:        if (-1 == fstat(fd, &st)) {
1.40      schwarze  597:                curp->file_status = MANDOCLEVEL_SYSERR;
                    598:                if (curp->mmsg)
                    599:                        (*curp->mmsg)(MANDOCERR_SYSSTAT, curp->file_status,
                    600:                            file, 0, 0, strerror(errno));
1.1       kristaps  601:                return(0);
                    602:        }
                    603:
                    604:        /*
                    605:         * If we're a regular file, try just reading in the whole entry
                    606:         * via mmap().  This is faster than reading it into blocks, and
                    607:         * since each file is only a few bytes to begin with, I'm not
                    608:         * concerned that this is going to tank any machines.
                    609:         */
                    610:
                    611:        if (S_ISREG(st.st_mode)) {
                    612:                if (st.st_size >= (1U << 31)) {
1.40      schwarze  613:                        curp->file_status = MANDOCLEVEL_FATAL;
                    614:                        if (curp->mmsg)
                    615:                                (*curp->mmsg)(MANDOCERR_TOOLARGE,
                    616:                                    curp->file_status, file, 0, 0, NULL);
1.1       kristaps  617:                        return(0);
                    618:                }
                    619:                *with_mmap = 1;
                    620:                fb->sz = (size_t)st.st_size;
1.37      schwarze  621:                fb->buf = mmap(NULL, fb->sz, PROT_READ, MAP_SHARED, fd, 0);
1.1       kristaps  622:                if (fb->buf != MAP_FAILED)
                    623:                        return(1);
                    624:        }
1.15      kristaps  625: #endif
1.1       kristaps  626:
                    627:        /*
                    628:         * If this isn't a regular file (like, say, stdin), then we must
                    629:         * go the old way and just read things in bit by bit.
                    630:         */
                    631:
                    632:        *with_mmap = 0;
                    633:        off = 0;
                    634:        fb->sz = 0;
                    635:        fb->buf = NULL;
                    636:        for (;;) {
                    637:                if (off == fb->sz) {
                    638:                        if (fb->sz == (1U << 31)) {
1.40      schwarze  639:                                curp->file_status = MANDOCLEVEL_FATAL;
                    640:                                if (curp->mmsg)
                    641:                                        (*curp->mmsg)(MANDOCERR_TOOLARGE,
                    642:                                            curp->file_status,
                    643:                                            file, 0, 0, NULL);
1.1       kristaps  644:                                break;
                    645:                        }
                    646:                        resize_buf(fb, 65536);
                    647:                }
                    648:                ssz = read(fd, fb->buf + (int)off, fb->sz - off);
                    649:                if (ssz == 0) {
                    650:                        fb->sz = off;
                    651:                        return(1);
                    652:                }
                    653:                if (ssz == -1) {
1.40      schwarze  654:                        curp->file_status = MANDOCLEVEL_SYSERR;
                    655:                        if (curp->mmsg)
                    656:                                (*curp->mmsg)(MANDOCERR_SYSREAD,
                    657:                                    curp->file_status, file, 0, 0,
                    658:                                    strerror(errno));
1.1       kristaps  659:                        break;
                    660:                }
                    661:                off += (size_t)ssz;
                    662:        }
                    663:
                    664:        free(fb->buf);
                    665:        fb->buf = NULL;
                    666:        return(0);
                    667: }
                    668:
                    669: static void
                    670: mparse_end(struct mparse *curp)
                    671: {
                    672:
                    673:        if (MANDOCLEVEL_FATAL <= curp->file_status)
                    674:                return;
                    675:
                    676:        if (curp->mdoc && ! mdoc_endparse(curp->mdoc)) {
                    677:                assert(MANDOCLEVEL_FATAL <= curp->file_status);
                    678:                return;
                    679:        }
                    680:
                    681:        if (curp->man && ! man_endparse(curp->man)) {
                    682:                assert(MANDOCLEVEL_FATAL <= curp->file_status);
                    683:                return;
                    684:        }
                    685:
1.45    ! schwarze  686:        if ( ! (curp->mdoc || curp->man || curp->sodest)) {
1.6       kristaps  687:                mandoc_msg(MANDOCERR_NOTMANUAL, curp, 1, 0, NULL);
1.1       kristaps  688:                curp->file_status = MANDOCLEVEL_FATAL;
1.6       kristaps  689:                return;
1.1       kristaps  690:        }
                    691:
                    692:        roff_endparse(curp->roff);
                    693: }
                    694:
                    695: static void
1.36      schwarze  696: mparse_parse_buffer(struct mparse *curp, struct buf blk, const char *file)
1.28      joerg     697: {
                    698:        const char      *svfile;
1.36      schwarze  699:        static int       recursion_depth;
                    700:
                    701:        if (64 < recursion_depth) {
                    702:                mandoc_msg(MANDOCERR_ROFFLOOP, curp, curp->line, 0, NULL);
                    703:                return;
                    704:        }
1.28      joerg     705:
                    706:        /* Line number is per-file. */
                    707:        svfile = curp->file;
                    708:        curp->file = file;
                    709:        curp->line = 1;
1.36      schwarze  710:        recursion_depth++;
1.28      joerg     711:
                    712:        mparse_buf_r(curp, blk, 1);
                    713:
1.36      schwarze  714:        if (0 == --recursion_depth && MANDOCLEVEL_FATAL > curp->file_status)
1.28      joerg     715:                mparse_end(curp);
                    716:
                    717:        curp->file = svfile;
                    718: }
                    719:
                    720: enum mandoclevel
                    721: mparse_readmem(struct mparse *curp, const void *buf, size_t len,
                    722:                const char *file)
                    723: {
                    724:        struct buf blk;
                    725:
                    726:        blk.buf = UNCONST(buf);
                    727:        blk.sz = len;
                    728:
1.36      schwarze  729:        mparse_parse_buffer(curp, blk, file);
1.28      joerg     730:        return(curp->file_status);
                    731: }
                    732:
1.36      schwarze  733: enum mandoclevel
                    734: mparse_readfd(struct mparse *curp, int fd, const char *file)
1.1       kristaps  735: {
1.28      joerg     736:        struct buf       blk;
                    737:        int              with_mmap;
1.1       kristaps  738:
1.40      schwarze  739:        if (-1 == fd && -1 == (fd = open(file, O_RDONLY, 0))) {
                    740:                curp->file_status = MANDOCLEVEL_SYSERR;
                    741:                if (curp->mmsg)
                    742:                        (*curp->mmsg)(MANDOCERR_SYSOPEN,
                    743:                            curp->file_status,
                    744:                            file, 0, 0, strerror(errno));
                    745:                goto out;
                    746:        }
                    747:
1.28      joerg     748:        /*
                    749:         * Run for each opened file; may be called more than once for
                    750:         * each full parse sequence if the opened file is nested (i.e.,
                    751:         * from `so').  Simply sucks in the whole file and moves into
                    752:         * the parse phase for the file.
                    753:         */
1.1       kristaps  754:
1.40      schwarze  755:        if ( ! read_whole_file(curp, file, fd, &blk, &with_mmap))
1.36      schwarze  756:                goto out;
1.1       kristaps  757:
1.36      schwarze  758:        mparse_parse_buffer(curp, blk, file);
1.1       kristaps  759:
1.28      joerg     760: #ifdef HAVE_MMAP
                    761:        if (with_mmap)
                    762:                munmap(blk.buf, blk.sz);
                    763:        else
                    764: #endif
                    765:                free(blk.buf);
1.1       kristaps  766:
                    767:        if (STDIN_FILENO != fd && -1 == close(fd))
                    768:                perror(file);
1.36      schwarze  769: out:
1.1       kristaps  770:        return(curp->file_status);
                    771: }
                    772:
                    773: struct mparse *
1.44      schwarze  774: mparse_alloc(int options, enum mandoclevel wlevel,
                    775:                mandocmsg mmsg, char *defos)
1.1       kristaps  776: {
                    777:        struct mparse   *curp;
1.10      kristaps  778:
                    779:        assert(wlevel <= MANDOCLEVEL_FATAL);
1.1       kristaps  780:
                    781:        curp = mandoc_calloc(1, sizeof(struct mparse));
                    782:
1.44      schwarze  783:        curp->options = options;
1.3       kristaps  784:        curp->wlevel = wlevel;
1.1       kristaps  785:        curp->mmsg = mmsg;
1.29      schwarze  786:        curp->defos = defos;
1.1       kristaps  787:
1.44      schwarze  788:        curp->roff = roff_alloc(curp, options);
1.1       kristaps  789:        return(curp);
                    790: }
                    791:
                    792: void
                    793: mparse_reset(struct mparse *curp)
                    794: {
                    795:
                    796:        roff_reset(curp->roff);
                    797:
                    798:        if (curp->mdoc)
                    799:                mdoc_reset(curp->mdoc);
                    800:        if (curp->man)
                    801:                man_reset(curp->man);
1.24      kristaps  802:        if (curp->secondary)
                    803:                curp->secondary->sz = 0;
1.1       kristaps  804:
                    805:        curp->file_status = MANDOCLEVEL_OK;
                    806:        curp->mdoc = NULL;
                    807:        curp->man = NULL;
1.45    ! schwarze  808:
        !           809:        free(curp->sodest);
        !           810:        curp->sodest = NULL;
1.1       kristaps  811: }
                    812:
                    813: void
                    814: mparse_free(struct mparse *curp)
                    815: {
                    816:
                    817:        if (curp->pmdoc)
                    818:                mdoc_free(curp->pmdoc);
                    819:        if (curp->pman)
                    820:                man_free(curp->pman);
                    821:        if (curp->roff)
                    822:                roff_free(curp->roff);
1.24      kristaps  823:        if (curp->secondary)
                    824:                free(curp->secondary->buf);
1.1       kristaps  825:
1.24      kristaps  826:        free(curp->secondary);
1.45    ! schwarze  827:        free(curp->sodest);
1.1       kristaps  828:        free(curp);
                    829: }
                    830:
                    831: void
1.45    ! schwarze  832: mparse_result(struct mparse *curp,
        !           833:        struct mdoc **mdoc, struct man **man, char **sodest)
1.1       kristaps  834: {
                    835:
1.45    ! schwarze  836:        if (sodest && NULL != (*sodest = curp->sodest)) {
        !           837:                *mdoc = NULL;
        !           838:                *man = NULL;
        !           839:                return;
        !           840:        }
1.9       kristaps  841:        if (mdoc)
                    842:                *mdoc = curp->mdoc;
                    843:        if (man)
                    844:                *man = curp->man;
1.3       kristaps  845: }
                    846:
                    847: void
                    848: mandoc_vmsg(enum mandocerr t, struct mparse *m,
                    849:                int ln, int pos, const char *fmt, ...)
                    850: {
                    851:        char             buf[256];
                    852:        va_list          ap;
                    853:
                    854:        va_start(ap, fmt);
                    855:        vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
                    856:        va_end(ap);
                    857:
                    858:        mandoc_msg(t, m, ln, pos, buf);
                    859: }
                    860:
                    861: void
                    862: mandoc_msg(enum mandocerr er, struct mparse *m,
                    863:                int ln, int col, const char *msg)
                    864: {
                    865:        enum mandoclevel level;
                    866:
                    867:        level = MANDOCLEVEL_FATAL;
                    868:        while (er < mandoclimits[level])
                    869:                level--;
                    870:
                    871:        if (level < m->wlevel)
                    872:                return;
                    873:
1.8       kristaps  874:        if (m->mmsg)
                    875:                (*m->mmsg)(er, level, m->file, ln, col, msg);
1.3       kristaps  876:
                    877:        if (m->file_status < level)
                    878:                m->file_status = level;
1.7       kristaps  879: }
                    880:
                    881: const char *
                    882: mparse_strerror(enum mandocerr er)
                    883: {
                    884:
                    885:        return(mandocerrs[er]);
                    886: }
                    887:
                    888: const char *
                    889: mparse_strlevel(enum mandoclevel lvl)
                    890: {
                    891:        return(mandoclevels[lvl]);
1.24      kristaps  892: }
                    893:
                    894: void
                    895: mparse_keep(struct mparse *p)
                    896: {
                    897:
                    898:        assert(NULL == p->secondary);
                    899:        p->secondary = mandoc_calloc(1, sizeof(struct buf));
                    900: }
                    901:
                    902: const char *
                    903: mparse_getkeep(const struct mparse *p)
                    904: {
                    905:
                    906:        assert(p->secondary);
                    907:        return(p->secondary->sz ? p->secondary->buf : NULL);
1.1       kristaps  908: }

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