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Annotation of mandoc/read.c, Revision 1.62

1.62    ! schwarze    1: /*     $Id: read.c,v 1.61 2014/07/04 16:12:08 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"
1.46      schwarze   40: #include "mandoc_aux.h"
1.3       kristaps   41: #include "libmandoc.h"
1.1       kristaps   42: #include "mdoc.h"
                     43: #include "man.h"
1.28      joerg      44: #include "main.h"
1.1       kristaps   45:
                     46: #define        REPARSE_LIMIT   1000
                     47:
                     48: struct buf {
1.47      schwarze   49:        char             *buf; /* binary input buffer */
1.1       kristaps   50:        size_t            sz; /* size of binary buffer */
                     51: };
                     52:
                     53: struct mparse {
                     54:        enum mandoclevel  file_status; /* status of current parse */
1.3       kristaps   55:        enum mandoclevel  wlevel; /* ignore messages below this */
1.1       kristaps   56:        int               line; /* line number in the file */
1.44      schwarze   57:        int               options; /* parser options */
1.1       kristaps   58:        struct man       *pman; /* persistent man parser */
                     59:        struct mdoc      *pmdoc; /* persistent mdoc parser */
                     60:        struct man       *man; /* man parser */
                     61:        struct mdoc      *mdoc; /* mdoc parser */
                     62:        struct roff      *roff; /* roff parser (!NULL) */
1.45      schwarze   63:        char             *sodest; /* filename pointed to by .so */
1.1       kristaps   64:        int               reparse_count; /* finite interp. stack */
                     65:        mandocmsg         mmsg; /* warning/error message handler */
1.47      schwarze   66:        const char       *file;
1.24      kristaps   67:        struct buf       *secondary;
1.29      schwarze   68:        char             *defos; /* default operating system */
1.1       kristaps   69: };
                     70:
                     71: static void      resize_buf(struct buf *, size_t);
                     72: static void      mparse_buf_r(struct mparse *, struct buf, int);
                     73: static void      pset(const char *, int, struct mparse *);
1.40      schwarze   74: static int       read_whole_file(struct mparse *, const char *, int,
                     75:                                struct buf *, int *);
1.1       kristaps   76: static void      mparse_end(struct mparse *);
1.37      schwarze   77: static void      mparse_parse_buffer(struct mparse *, struct buf,
                     78:                        const char *);
1.1       kristaps   79:
1.3       kristaps   80: static const enum mandocerr    mandoclimits[MANDOCLEVEL_MAX] = {
                     81:        MANDOCERR_OK,
                     82:        MANDOCERR_WARNING,
                     83:        MANDOCERR_WARNING,
                     84:        MANDOCERR_ERROR,
                     85:        MANDOCERR_FATAL,
                     86:        MANDOCERR_MAX,
                     87:        MANDOCERR_MAX
                     88: };
                     89:
1.7       kristaps   90: static const char * const      mandocerrs[MANDOCERR_MAX] = {
                     91:        "ok",
                     92:
                     93:        "generic warning",
                     94:
                     95:        /* related to the prologue */
1.54      schwarze   96:        "missing .TH macro, using \"unknown 1\"",
                     97:        "lower case character in document title",
1.7       kristaps   98:        "unknown manual section",
1.32      schwarze   99:        "unknown manual volume or arch",
1.54      schwarze  100:        "missing date, using today's date",
1.7       kristaps  101:        "cannot parse date, using it verbatim",
                    102:        "prologue macros out of order",
                    103:        "duplicate prologue macro",
1.54      schwarze  104:        "incomplete prologue, terminated by",
                    105:        "skipping prologue macro in body",
1.7       kristaps  106:
                    107:        /* related to document structure */
                    108:        ".so is fragile, better use ln(1)",
1.50      schwarze  109:        "no document body",
1.54      schwarze  110:        "content before first section header",
                    111:        "first section is not \"NAME\"",
1.7       kristaps  112:        "bad NAME section contents",
                    113:        "sections out of conventional order",
1.54      schwarze  114:        "duplicate section title",
                    115:        "unexpected section",
1.7       kristaps  116:
                    117:        /* related to macros and nesting */
1.55      schwarze  118:        "obsolete macro",
1.7       kristaps  119:        "skipping paragraph macro",
1.31      schwarze  120:        "moving paragraph macro out of list",
1.7       kristaps  121:        "skipping no-space macro",
                    122:        "blocks badly nested",
                    123:        "nested displays are not portable",
1.57      schwarze  124:        "moving content out of list",
                    125:        ".Vt block has child macro",
1.56      schwarze  126:        "fill mode already enabled, skipping .fi",
                    127:        "fill mode already disabled, skipping .nf",
1.7       kristaps  128:        "line scope broken",
                    129:
                    130:        /* related to missing macro arguments */
1.58      schwarze  131:        "skipping empty request",
                    132:        "conditional request controls empty scope",
1.7       kristaps  133:        "skipping empty macro",
1.62    ! schwarze  134:        "empty argument, using 0n",
1.7       kristaps  135:        "argument count wrong",
1.60      schwarze  136:        "missing display type, using -ragged",
                    137:        "list type is not the first argument",
                    138:        "missing -width in -tag list, using 8n",
                    139:        "empty head in list item",
                    140:        "empty list item",
1.61      schwarze  141:        "missing font type, using \\fR",
                    142:        "unknown font type, using \\fR",
1.60      schwarze  143:        "missing -std argument, adding it",
1.7       kristaps  144:
                    145:        /* related to bad macro arguments */
                    146:        "skipping argument",
                    147:        "duplicate argument",
                    148:        "duplicate display type",
                    149:        "duplicate list type",
                    150:        "unknown AT&T UNIX version",
                    151:        "bad Boolean value",
                    152:        "unknown font",
                    153:        "unknown standard specifier",
                    154:        "bad width argument",
                    155:
                    156:        /* related to plain text */
                    157:        "blank line in non-literal context",
                    158:        "tab in non-literal context",
                    159:        "end of line whitespace",
                    160:        "bad comment style",
1.12      kristaps  161:        "bad escape sequence",
1.7       kristaps  162:        "unterminated quoted string",
1.16      kristaps  163:
1.7       kristaps  164:        "generic error",
1.17      kristaps  165:
                    166:        /* related to equations */
1.20      kristaps  167:        "unexpected equation scope closure",
                    168:        "equation scope open on exit",
1.21      kristaps  169:        "overlapping equation scopes",
                    170:        "unexpected end of equation",
                    171:        "equation syntax error",
1.7       kristaps  172:
                    173:        /* related to tables */
                    174:        "bad table syntax",
                    175:        "bad table option",
                    176:        "bad table layout",
                    177:        "no table layout cells specified",
                    178:        "no table data cells specified",
                    179:        "ignore data in cell",
                    180:        "data block still open",
                    181:        "ignoring extra data cells",
                    182:
                    183:        "input stack limit exceeded, infinite loop?",
                    184:        "skipping bad character",
                    185:        "escaped character not allowed in a name",
1.30      schwarze  186:        "manual name not yet set",
1.54      schwarze  187:        "skipping text before first section header",
1.7       kristaps  188:        "skipping unknown macro",
                    189:        "NOT IMPLEMENTED, please use groff: skipping request",
                    190:        "argument count wrong",
1.57      schwarze  191:        "skipping invalid content in .Rs block",
1.34      schwarze  192:        "skipping column outside column list",
1.7       kristaps  193:        "skipping end of block that is not open",
                    194:        "missing end of block",
                    195:        "scope open on exit",
                    196:        "uname(3) system call failed",
1.38      schwarze  197:        "request requires a numeric argument",
1.60      schwarze  198:        "missing list type, using -item",
1.61      schwarze  199:        "skipping all arguments",
                    200:        "skipping excess arguments",
1.7       kristaps  201:
                    202:        "generic fatal error",
                    203:
1.40      schwarze  204:        "input too large",
1.7       kristaps  205:        "not a manual",
                    206:        "column syntax is inconsistent",
                    207:        "NOT IMPLEMENTED: .Bd -file",
                    208:        "child violates parent syntax",
                    209:        "argument count wrong, violates syntax",
                    210:        "NOT IMPLEMENTED: .so with absolute path or \"..\"",
1.52      schwarze  211:        ".so request failed",
1.7       kristaps  212:        "no document prologue",
                    213:        "static buffer exhausted",
1.40      schwarze  214:
                    215:        /* system errors */
1.51      schwarze  216:        NULL,
1.40      schwarze  217:        "cannot stat file",
                    218:        "cannot read file",
1.7       kristaps  219: };
                    220:
                    221: static const char * const      mandoclevels[MANDOCLEVEL_MAX] = {
                    222:        "SUCCESS",
                    223:        "RESERVED",
                    224:        "WARNING",
                    225:        "ERROR",
                    226:        "FATAL",
                    227:        "BADARG",
                    228:        "SYSERR"
                    229: };
                    230:
1.47      schwarze  231:
1.1       kristaps  232: static void
                    233: resize_buf(struct buf *buf, size_t initial)
                    234: {
                    235:
                    236:        buf->sz = buf->sz > initial/2 ? 2 * buf->sz : initial;
                    237:        buf->buf = mandoc_realloc(buf->buf, buf->sz);
                    238: }
                    239:
                    240: static void
                    241: pset(const char *buf, int pos, struct mparse *curp)
                    242: {
                    243:        int              i;
                    244:
                    245:        /*
                    246:         * Try to intuit which kind of manual parser should be used.  If
                    247:         * passed in by command-line (-man, -mdoc), then use that
                    248:         * explicitly.  If passed as -mandoc, then try to guess from the
                    249:         * line: either skip dot-lines, use -mdoc when finding `.Dt', or
                    250:         * default to -man, which is more lenient.
                    251:         *
                    252:         * Separate out pmdoc/pman from mdoc/man: the first persists
                    253:         * through all parsers, while the latter is used per-parse.
                    254:         */
                    255:
                    256:        if ('.' == buf[0] || '\'' == buf[0]) {
                    257:                for (i = 1; buf[i]; i++)
                    258:                        if (' ' != buf[i] && '\t' != buf[i])
                    259:                                break;
                    260:                if ('\0' == buf[i])
                    261:                        return;
                    262:        }
                    263:
1.44      schwarze  264:        if (MPARSE_MDOC & curp->options) {
1.47      schwarze  265:                if (NULL == curp->pmdoc)
1.44      schwarze  266:                        curp->pmdoc = mdoc_alloc(
                    267:                            curp->roff, curp, curp->defos,
                    268:                            MPARSE_QUICK & curp->options ? 1 : 0);
1.1       kristaps  269:                assert(curp->pmdoc);
                    270:                curp->mdoc = curp->pmdoc;
                    271:                return;
1.44      schwarze  272:        } else if (MPARSE_MAN & curp->options) {
1.47      schwarze  273:                if (NULL == curp->pman)
1.41      schwarze  274:                        curp->pman = man_alloc(curp->roff, curp,
1.44      schwarze  275:                            MPARSE_QUICK & curp->options ? 1 : 0);
1.1       kristaps  276:                assert(curp->pman);
                    277:                curp->man = curp->pman;
                    278:                return;
                    279:        }
                    280:
                    281:        if (pos >= 3 && 0 == memcmp(buf, ".Dd", 3))  {
1.47      schwarze  282:                if (NULL == curp->pmdoc)
1.44      schwarze  283:                        curp->pmdoc = mdoc_alloc(
                    284:                            curp->roff, curp, curp->defos,
                    285:                            MPARSE_QUICK & curp->options ? 1 : 0);
1.1       kristaps  286:                assert(curp->pmdoc);
                    287:                curp->mdoc = curp->pmdoc;
                    288:                return;
1.47      schwarze  289:        }
1.1       kristaps  290:
1.47      schwarze  291:        if (NULL == curp->pman)
1.44      schwarze  292:                curp->pman = man_alloc(curp->roff, curp,
                    293:                    MPARSE_QUICK & curp->options ? 1 : 0);
1.1       kristaps  294:        assert(curp->pman);
                    295:        curp->man = curp->pman;
                    296: }
                    297:
                    298: /*
                    299:  * Main parse routine for an opened file.  This is called for each
                    300:  * opened file and simply loops around the full input file, possibly
                    301:  * nesting (i.e., with `so').
                    302:  */
                    303: static void
                    304: mparse_buf_r(struct mparse *curp, struct buf blk, int start)
                    305: {
                    306:        const struct tbl_span   *span;
                    307:        struct buf       ln;
                    308:        enum rofferr     rr;
                    309:        int              i, of, rc;
                    310:        int              pos; /* byte number in the ln buffer */
                    311:        int              lnn; /* line number in the real file */
                    312:        unsigned char    c;
                    313:
                    314:        memset(&ln, 0, sizeof(struct buf));
                    315:
1.47      schwarze  316:        lnn = curp->line;
                    317:        pos = 0;
1.1       kristaps  318:
                    319:        for (i = 0; i < (int)blk.sz; ) {
                    320:                if (0 == pos && '\0' == blk.buf[i])
                    321:                        break;
                    322:
                    323:                if (start) {
                    324:                        curp->line = lnn;
                    325:                        curp->reparse_count = 0;
                    326:                }
                    327:
                    328:                while (i < (int)blk.sz && (start || '\0' != blk.buf[i])) {
                    329:
                    330:                        /*
                    331:                         * When finding an unescaped newline character,
                    332:                         * leave the character loop to process the line.
                    333:                         * Skip a preceding carriage return, if any.
                    334:                         */
                    335:
                    336:                        if ('\r' == blk.buf[i] && i + 1 < (int)blk.sz &&
                    337:                            '\n' == blk.buf[i + 1])
                    338:                                ++i;
                    339:                        if ('\n' == blk.buf[i]) {
                    340:                                ++i;
                    341:                                ++lnn;
                    342:                                break;
                    343:                        }
                    344:
1.35      schwarze  345:                        /*
                    346:                         * Make sure we have space for at least
                    347:                         * one backslash and one other character
                    348:                         * and the trailing NUL byte.
                    349:                         */
                    350:
                    351:                        if (pos + 2 >= (int)ln.sz)
                    352:                                resize_buf(&ln, 256);
                    353:
1.47      schwarze  354:                        /*
1.1       kristaps  355:                         * Warn about bogus characters.  If you're using
                    356:                         * non-ASCII encoding, you're screwing your
                    357:                         * readers.  Since I'd rather this not happen,
1.27      joerg     358:                         * I'll be helpful and replace these characters
                    359:                         * with "?", so we don't display gibberish.
                    360:                         * Note to manual writers: use special characters.
1.1       kristaps  361:                         */
                    362:
                    363:                        c = (unsigned char) blk.buf[i];
                    364:
1.47      schwarze  365:                        if ( ! (isascii(c) &&
                    366:                            (isgraph(c) || isblank(c)))) {
1.3       kristaps  367:                                mandoc_msg(MANDOCERR_BADCHAR, curp,
1.47      schwarze  368:                                    curp->line, pos, NULL);
1.1       kristaps  369:                                i++;
1.27      joerg     370:                                ln.buf[pos++] = '?';
1.1       kristaps  371:                                continue;
                    372:                        }
                    373:
                    374:                        /* Trailing backslash = a plain char. */
                    375:
                    376:                        if ('\\' != blk.buf[i] || i + 1 == (int)blk.sz) {
                    377:                                ln.buf[pos++] = blk.buf[i++];
                    378:                                continue;
                    379:                        }
                    380:
                    381:                        /*
                    382:                         * Found escape and at least one other character.
                    383:                         * When it's a newline character, skip it.
                    384:                         * When there is a carriage return in between,
                    385:                         * skip that one as well.
                    386:                         */
                    387:
                    388:                        if ('\r' == blk.buf[i + 1] && i + 2 < (int)blk.sz &&
                    389:                            '\n' == blk.buf[i + 2])
                    390:                                ++i;
                    391:                        if ('\n' == blk.buf[i + 1]) {
                    392:                                i += 2;
                    393:                                ++lnn;
                    394:                                continue;
                    395:                        }
                    396:
1.13      kristaps  397:                        if ('"' == blk.buf[i + 1] || '#' == blk.buf[i + 1]) {
1.1       kristaps  398:                                i += 2;
                    399:                                /* Comment, skip to end of line */
                    400:                                for (; i < (int)blk.sz; ++i) {
                    401:                                        if ('\n' == blk.buf[i]) {
                    402:                                                ++i;
                    403:                                                ++lnn;
                    404:                                                break;
                    405:                                        }
                    406:                                }
                    407:
                    408:                                /* Backout trailing whitespaces */
                    409:                                for (; pos > 0; --pos) {
                    410:                                        if (ln.buf[pos - 1] != ' ')
                    411:                                                break;
                    412:                                        if (pos > 2 && ln.buf[pos - 2] == '\\')
                    413:                                                break;
                    414:                                }
                    415:                                break;
                    416:                        }
                    417:
1.35      schwarze  418:                        /* Catch escaped bogus characters. */
                    419:
                    420:                        c = (unsigned char) blk.buf[i+1];
                    421:
1.47      schwarze  422:                        if ( ! (isascii(c) &&
                    423:                            (isgraph(c) || isblank(c)))) {
1.35      schwarze  424:                                mandoc_msg(MANDOCERR_BADCHAR, curp,
1.47      schwarze  425:                                    curp->line, pos, NULL);
1.35      schwarze  426:                                i += 2;
                    427:                                ln.buf[pos++] = '?';
                    428:                                continue;
                    429:                        }
                    430:
1.1       kristaps  431:                        /* Some other escape sequence, copy & cont. */
                    432:
                    433:                        ln.buf[pos++] = blk.buf[i++];
                    434:                        ln.buf[pos++] = blk.buf[i++];
                    435:                }
                    436:
1.47      schwarze  437:                if (pos >= (int)ln.sz)
1.1       kristaps  438:                        resize_buf(&ln, 256);
                    439:
                    440:                ln.buf[pos] = '\0';
                    441:
                    442:                /*
                    443:                 * A significant amount of complexity is contained by
                    444:                 * the roff preprocessor.  It's line-oriented but can be
                    445:                 * expressed on one line, so we need at times to
                    446:                 * readjust our starting point and re-run it.  The roff
                    447:                 * preprocessor can also readjust the buffers with new
                    448:                 * data, so we pass them in wholesale.
                    449:                 */
                    450:
                    451:                of = 0;
                    452:
1.24      kristaps  453:                /*
                    454:                 * Maintain a lookaside buffer of all parsed lines.  We
                    455:                 * only do this if mparse_keep() has been invoked (the
                    456:                 * buffer may be accessed with mparse_getkeep()).
                    457:                 */
                    458:
                    459:                if (curp->secondary) {
1.47      schwarze  460:                        curp->secondary->buf = mandoc_realloc(
                    461:                            curp->secondary->buf,
                    462:                            curp->secondary->sz + pos + 2);
                    463:                        memcpy(curp->secondary->buf +
                    464:                            curp->secondary->sz,
                    465:                            ln.buf, pos);
1.24      kristaps  466:                        curp->secondary->sz += pos;
                    467:                        curp->secondary->buf
                    468:                                [curp->secondary->sz] = '\n';
                    469:                        curp->secondary->sz++;
                    470:                        curp->secondary->buf
                    471:                                [curp->secondary->sz] = '\0';
                    472:                }
1.1       kristaps  473: rerun:
1.47      schwarze  474:                rr = roff_parseln(curp->roff, curp->line,
                    475:                    &ln.buf, &ln.sz, of, &of);
1.1       kristaps  476:
                    477:                switch (rr) {
1.47      schwarze  478:                case ROFF_REPARSE:
1.1       kristaps  479:                        if (REPARSE_LIMIT >= ++curp->reparse_count)
                    480:                                mparse_buf_r(curp, ln, 0);
                    481:                        else
1.3       kristaps  482:                                mandoc_msg(MANDOCERR_ROFFLOOP, curp,
1.47      schwarze  483:                                    curp->line, pos, NULL);
1.1       kristaps  484:                        pos = 0;
                    485:                        continue;
1.47      schwarze  486:                case ROFF_APPEND:
1.1       kristaps  487:                        pos = (int)strlen(ln.buf);
                    488:                        continue;
1.47      schwarze  489:                case ROFF_RERUN:
1.1       kristaps  490:                        goto rerun;
1.47      schwarze  491:                case ROFF_IGN:
1.1       kristaps  492:                        pos = 0;
                    493:                        continue;
1.47      schwarze  494:                case ROFF_ERR:
1.1       kristaps  495:                        assert(MANDOCLEVEL_FATAL <= curp->file_status);
                    496:                        break;
1.47      schwarze  497:                case ROFF_SO:
1.45      schwarze  498:                        if (0 == (MPARSE_SO & curp->options) &&
                    499:                            (i >= (int)blk.sz || '\0' == blk.buf[i])) {
                    500:                                curp->sodest = mandoc_strdup(ln.buf + of);
                    501:                                free(ln.buf);
                    502:                                return;
                    503:                        }
1.24      kristaps  504:                        /*
                    505:                         * We remove `so' clauses from our lookaside
                    506:                         * buffer because we're going to descend into
                    507:                         * the file recursively.
                    508:                         */
1.47      schwarze  509:                        if (curp->secondary)
1.25      kristaps  510:                                curp->secondary->sz -= pos + 1;
1.36      schwarze  511:                        mparse_readfd(curp, -1, ln.buf + of);
1.52      schwarze  512:                        if (MANDOCLEVEL_FATAL <= curp->file_status) {
                    513:                                mandoc_vmsg(MANDOCERR_SO_FAIL,
                    514:                                    curp, curp->line, pos,
                    515:                                    ".so %s", ln.buf + of);
1.1       kristaps  516:                                break;
1.52      schwarze  517:                        }
1.1       kristaps  518:                        pos = 0;
                    519:                        continue;
                    520:                default:
                    521:                        break;
                    522:                }
                    523:
                    524:                /*
                    525:                 * If we encounter errors in the recursive parse, make
                    526:                 * sure we don't continue parsing.
                    527:                 */
                    528:
                    529:                if (MANDOCLEVEL_FATAL <= curp->file_status)
                    530:                        break;
                    531:
                    532:                /*
                    533:                 * If input parsers have not been allocated, do so now.
1.14      kristaps  534:                 * We keep these instanced between parsers, but set them
1.1       kristaps  535:                 * locally per parse routine since we can use different
                    536:                 * parsers with each one.
                    537:                 */
                    538:
                    539:                if ( ! (curp->man || curp->mdoc))
                    540:                        pset(ln.buf + of, pos - of, curp);
                    541:
1.47      schwarze  542:                /*
1.1       kristaps  543:                 * Lastly, push down into the parsers themselves.  One
                    544:                 * of these will have already been set in the pset()
                    545:                 * routine.
                    546:                 * If libroff returns ROFF_TBL, then add it to the
                    547:                 * currently open parse.  Since we only get here if
                    548:                 * there does exist data (see tbl_data.c), we're
                    549:                 * guaranteed that something's been allocated.
                    550:                 * Do the same for ROFF_EQN.
                    551:                 */
                    552:
                    553:                rc = -1;
                    554:
                    555:                if (ROFF_TBL == rr)
                    556:                        while (NULL != (span = roff_span(curp->roff))) {
                    557:                                rc = curp->man ?
1.47      schwarze  558:                                    man_addspan(curp->man, span) :
                    559:                                    mdoc_addspan(curp->mdoc, span);
1.1       kristaps  560:                                if (0 == rc)
                    561:                                        break;
                    562:                        }
                    563:                else if (ROFF_EQN == rr)
1.47      schwarze  564:                        rc = curp->mdoc ?
                    565:                            mdoc_addeqn(curp->mdoc,
                    566:                                roff_eqn(curp->roff)) :
                    567:                            man_addeqn(curp->man,
                    568:                                roff_eqn(curp->roff));
1.1       kristaps  569:                else if (curp->man || curp->mdoc)
                    570:                        rc = curp->man ?
1.47      schwarze  571:                            man_parseln(curp->man,
                    572:                                curp->line, ln.buf, of) :
                    573:                            mdoc_parseln(curp->mdoc,
                    574:                                curp->line, ln.buf, of);
1.1       kristaps  575:
                    576:                if (0 == rc) {
                    577:                        assert(MANDOCLEVEL_FATAL <= curp->file_status);
                    578:                        break;
1.41      schwarze  579:                } else if (2 == rc)
                    580:                        break;
1.1       kristaps  581:
                    582:                /* Temporary buffers typically are not full. */
                    583:
                    584:                if (0 == start && '\0' == blk.buf[i])
                    585:                        break;
                    586:
                    587:                /* Start the next input line. */
                    588:
                    589:                pos = 0;
                    590:        }
                    591:
                    592:        free(ln.buf);
                    593: }
                    594:
                    595: static int
1.40      schwarze  596: read_whole_file(struct mparse *curp, const char *file, int fd,
                    597:                struct buf *fb, int *with_mmap)
1.1       kristaps  598: {
                    599:        size_t           off;
                    600:        ssize_t          ssz;
                    601:
1.15      kristaps  602: #ifdef HAVE_MMAP
                    603:        struct stat      st;
1.1       kristaps  604:        if (-1 == fstat(fd, &st)) {
1.40      schwarze  605:                curp->file_status = MANDOCLEVEL_SYSERR;
                    606:                if (curp->mmsg)
                    607:                        (*curp->mmsg)(MANDOCERR_SYSSTAT, curp->file_status,
                    608:                            file, 0, 0, strerror(errno));
1.1       kristaps  609:                return(0);
                    610:        }
                    611:
                    612:        /*
                    613:         * If we're a regular file, try just reading in the whole entry
                    614:         * via mmap().  This is faster than reading it into blocks, and
                    615:         * since each file is only a few bytes to begin with, I'm not
                    616:         * concerned that this is going to tank any machines.
                    617:         */
                    618:
                    619:        if (S_ISREG(st.st_mode)) {
                    620:                if (st.st_size >= (1U << 31)) {
1.40      schwarze  621:                        curp->file_status = MANDOCLEVEL_FATAL;
                    622:                        if (curp->mmsg)
                    623:                                (*curp->mmsg)(MANDOCERR_TOOLARGE,
                    624:                                    curp->file_status, file, 0, 0, NULL);
1.1       kristaps  625:                        return(0);
                    626:                }
                    627:                *with_mmap = 1;
                    628:                fb->sz = (size_t)st.st_size;
1.37      schwarze  629:                fb->buf = mmap(NULL, fb->sz, PROT_READ, MAP_SHARED, fd, 0);
1.1       kristaps  630:                if (fb->buf != MAP_FAILED)
                    631:                        return(1);
                    632:        }
1.15      kristaps  633: #endif
1.1       kristaps  634:
                    635:        /*
                    636:         * If this isn't a regular file (like, say, stdin), then we must
                    637:         * go the old way and just read things in bit by bit.
                    638:         */
                    639:
                    640:        *with_mmap = 0;
                    641:        off = 0;
                    642:        fb->sz = 0;
                    643:        fb->buf = NULL;
                    644:        for (;;) {
                    645:                if (off == fb->sz) {
                    646:                        if (fb->sz == (1U << 31)) {
1.40      schwarze  647:                                curp->file_status = MANDOCLEVEL_FATAL;
                    648:                                if (curp->mmsg)
                    649:                                        (*curp->mmsg)(MANDOCERR_TOOLARGE,
                    650:                                            curp->file_status,
                    651:                                            file, 0, 0, NULL);
1.1       kristaps  652:                                break;
                    653:                        }
                    654:                        resize_buf(fb, 65536);
                    655:                }
                    656:                ssz = read(fd, fb->buf + (int)off, fb->sz - off);
                    657:                if (ssz == 0) {
                    658:                        fb->sz = off;
                    659:                        return(1);
                    660:                }
                    661:                if (ssz == -1) {
1.40      schwarze  662:                        curp->file_status = MANDOCLEVEL_SYSERR;
                    663:                        if (curp->mmsg)
                    664:                                (*curp->mmsg)(MANDOCERR_SYSREAD,
                    665:                                    curp->file_status, file, 0, 0,
                    666:                                    strerror(errno));
1.1       kristaps  667:                        break;
                    668:                }
                    669:                off += (size_t)ssz;
                    670:        }
                    671:
                    672:        free(fb->buf);
                    673:        fb->buf = NULL;
                    674:        return(0);
                    675: }
                    676:
                    677: static void
                    678: mparse_end(struct mparse *curp)
                    679: {
                    680:
                    681:        if (MANDOCLEVEL_FATAL <= curp->file_status)
                    682:                return;
                    683:
                    684:        if (curp->mdoc && ! mdoc_endparse(curp->mdoc)) {
                    685:                assert(MANDOCLEVEL_FATAL <= curp->file_status);
                    686:                return;
                    687:        }
                    688:
                    689:        if (curp->man && ! man_endparse(curp->man)) {
                    690:                assert(MANDOCLEVEL_FATAL <= curp->file_status);
                    691:                return;
                    692:        }
                    693:
1.45      schwarze  694:        if ( ! (curp->mdoc || curp->man || curp->sodest)) {
1.50      schwarze  695:                mandoc_msg(MANDOCERR_NOTMANUAL, curp, 0, 0, NULL);
1.1       kristaps  696:                curp->file_status = MANDOCLEVEL_FATAL;
1.6       kristaps  697:                return;
1.1       kristaps  698:        }
                    699:
                    700:        roff_endparse(curp->roff);
                    701: }
                    702:
                    703: static void
1.36      schwarze  704: mparse_parse_buffer(struct mparse *curp, struct buf blk, const char *file)
1.28      joerg     705: {
                    706:        const char      *svfile;
1.36      schwarze  707:        static int       recursion_depth;
                    708:
                    709:        if (64 < recursion_depth) {
                    710:                mandoc_msg(MANDOCERR_ROFFLOOP, curp, curp->line, 0, NULL);
                    711:                return;
                    712:        }
1.28      joerg     713:
                    714:        /* Line number is per-file. */
                    715:        svfile = curp->file;
                    716:        curp->file = file;
                    717:        curp->line = 1;
1.36      schwarze  718:        recursion_depth++;
1.28      joerg     719:
                    720:        mparse_buf_r(curp, blk, 1);
                    721:
1.36      schwarze  722:        if (0 == --recursion_depth && MANDOCLEVEL_FATAL > curp->file_status)
1.28      joerg     723:                mparse_end(curp);
                    724:
                    725:        curp->file = svfile;
                    726: }
                    727:
                    728: enum mandoclevel
                    729: mparse_readmem(struct mparse *curp, const void *buf, size_t len,
                    730:                const char *file)
                    731: {
                    732:        struct buf blk;
                    733:
                    734:        blk.buf = UNCONST(buf);
                    735:        blk.sz = len;
                    736:
1.36      schwarze  737:        mparse_parse_buffer(curp, blk, file);
1.28      joerg     738:        return(curp->file_status);
                    739: }
                    740:
1.36      schwarze  741: enum mandoclevel
                    742: mparse_readfd(struct mparse *curp, int fd, const char *file)
1.1       kristaps  743: {
1.28      joerg     744:        struct buf       blk;
                    745:        int              with_mmap;
1.1       kristaps  746:
1.40      schwarze  747:        if (-1 == fd && -1 == (fd = open(file, O_RDONLY, 0))) {
                    748:                curp->file_status = MANDOCLEVEL_SYSERR;
                    749:                if (curp->mmsg)
                    750:                        (*curp->mmsg)(MANDOCERR_SYSOPEN,
                    751:                            curp->file_status,
                    752:                            file, 0, 0, strerror(errno));
                    753:                goto out;
                    754:        }
                    755:
1.28      joerg     756:        /*
                    757:         * Run for each opened file; may be called more than once for
                    758:         * each full parse sequence if the opened file is nested (i.e.,
                    759:         * from `so').  Simply sucks in the whole file and moves into
                    760:         * the parse phase for the file.
                    761:         */
1.1       kristaps  762:
1.40      schwarze  763:        if ( ! read_whole_file(curp, file, fd, &blk, &with_mmap))
1.36      schwarze  764:                goto out;
1.1       kristaps  765:
1.36      schwarze  766:        mparse_parse_buffer(curp, blk, file);
1.1       kristaps  767:
1.28      joerg     768: #ifdef HAVE_MMAP
                    769:        if (with_mmap)
                    770:                munmap(blk.buf, blk.sz);
                    771:        else
                    772: #endif
                    773:                free(blk.buf);
1.1       kristaps  774:
                    775:        if (STDIN_FILENO != fd && -1 == close(fd))
                    776:                perror(file);
1.36      schwarze  777: out:
1.1       kristaps  778:        return(curp->file_status);
                    779: }
                    780:
                    781: struct mparse *
1.44      schwarze  782: mparse_alloc(int options, enum mandoclevel wlevel,
                    783:                mandocmsg mmsg, char *defos)
1.1       kristaps  784: {
                    785:        struct mparse   *curp;
1.10      kristaps  786:
                    787:        assert(wlevel <= MANDOCLEVEL_FATAL);
1.1       kristaps  788:
                    789:        curp = mandoc_calloc(1, sizeof(struct mparse));
                    790:
1.44      schwarze  791:        curp->options = options;
1.3       kristaps  792:        curp->wlevel = wlevel;
1.1       kristaps  793:        curp->mmsg = mmsg;
1.29      schwarze  794:        curp->defos = defos;
1.1       kristaps  795:
1.44      schwarze  796:        curp->roff = roff_alloc(curp, options);
1.1       kristaps  797:        return(curp);
                    798: }
                    799:
                    800: void
                    801: mparse_reset(struct mparse *curp)
                    802: {
                    803:
                    804:        roff_reset(curp->roff);
                    805:
                    806:        if (curp->mdoc)
                    807:                mdoc_reset(curp->mdoc);
                    808:        if (curp->man)
                    809:                man_reset(curp->man);
1.24      kristaps  810:        if (curp->secondary)
                    811:                curp->secondary->sz = 0;
1.1       kristaps  812:
                    813:        curp->file_status = MANDOCLEVEL_OK;
                    814:        curp->mdoc = NULL;
                    815:        curp->man = NULL;
1.45      schwarze  816:
                    817:        free(curp->sodest);
                    818:        curp->sodest = NULL;
1.1       kristaps  819: }
                    820:
                    821: void
                    822: mparse_free(struct mparse *curp)
                    823: {
                    824:
                    825:        if (curp->pmdoc)
                    826:                mdoc_free(curp->pmdoc);
                    827:        if (curp->pman)
                    828:                man_free(curp->pman);
                    829:        if (curp->roff)
                    830:                roff_free(curp->roff);
1.24      kristaps  831:        if (curp->secondary)
                    832:                free(curp->secondary->buf);
1.1       kristaps  833:
1.24      kristaps  834:        free(curp->secondary);
1.45      schwarze  835:        free(curp->sodest);
1.1       kristaps  836:        free(curp);
                    837: }
                    838:
                    839: void
1.45      schwarze  840: mparse_result(struct mparse *curp,
                    841:        struct mdoc **mdoc, struct man **man, char **sodest)
1.1       kristaps  842: {
                    843:
1.45      schwarze  844:        if (sodest && NULL != (*sodest = curp->sodest)) {
                    845:                *mdoc = NULL;
                    846:                *man = NULL;
                    847:                return;
                    848:        }
1.9       kristaps  849:        if (mdoc)
                    850:                *mdoc = curp->mdoc;
                    851:        if (man)
                    852:                *man = curp->man;
1.3       kristaps  853: }
                    854:
                    855: void
                    856: mandoc_vmsg(enum mandocerr t, struct mparse *m,
                    857:                int ln, int pos, const char *fmt, ...)
                    858: {
                    859:        char             buf[256];
                    860:        va_list          ap;
                    861:
                    862:        va_start(ap, fmt);
1.48      schwarze  863:        (void)vsnprintf(buf, sizeof(buf), fmt, ap);
1.3       kristaps  864:        va_end(ap);
                    865:
                    866:        mandoc_msg(t, m, ln, pos, buf);
                    867: }
                    868:
                    869: void
1.47      schwarze  870: mandoc_msg(enum mandocerr er, struct mparse *m,
1.3       kristaps  871:                int ln, int col, const char *msg)
                    872: {
                    873:        enum mandoclevel level;
                    874:
                    875:        level = MANDOCLEVEL_FATAL;
                    876:        while (er < mandoclimits[level])
                    877:                level--;
                    878:
                    879:        if (level < m->wlevel)
                    880:                return;
                    881:
1.8       kristaps  882:        if (m->mmsg)
                    883:                (*m->mmsg)(er, level, m->file, ln, col, msg);
1.3       kristaps  884:
                    885:        if (m->file_status < level)
                    886:                m->file_status = level;
1.7       kristaps  887: }
                    888:
                    889: const char *
                    890: mparse_strerror(enum mandocerr er)
                    891: {
                    892:
                    893:        return(mandocerrs[er]);
                    894: }
                    895:
                    896: const char *
                    897: mparse_strlevel(enum mandoclevel lvl)
                    898: {
                    899:        return(mandoclevels[lvl]);
1.24      kristaps  900: }
                    901:
                    902: void
                    903: mparse_keep(struct mparse *p)
                    904: {
                    905:
                    906:        assert(NULL == p->secondary);
                    907:        p->secondary = mandoc_calloc(1, sizeof(struct buf));
                    908: }
                    909:
                    910: const char *
                    911: mparse_getkeep(const struct mparse *p)
                    912: {
                    913:
                    914:        assert(p->secondary);
                    915:        return(p->secondary->sz ? p->secondary->buf : NULL);
1.1       kristaps  916: }

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