Annotation of src/usr.bin/mandoc/read.c, Revision 1.182
1.182 ! schwarze 1: /* $OpenBSD: read.c,v 1.181 2018/12/31 04:55:42 schwarze Exp $ */
1.1 schwarze 2: /*
3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.182 ! schwarze 4: * Copyright (c) 2010-2019 Ingo Schwarze <schwarze@openbsd.org>
1.20 schwarze 5: * Copyright (c) 2010, 2012 Joerg Sonnenberger <joerg@netbsd.org>
1.1 schwarze 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: *
1.108 schwarze 11: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.1 schwarze 12: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.108 schwarze 13: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.1 schwarze 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: */
1.58 schwarze 19: #include <sys/types.h>
20: #include <sys/mman.h>
1.1 schwarze 21: #include <sys/stat.h>
22:
23: #include <assert.h>
24: #include <ctype.h>
1.18 schwarze 25: #include <errno.h>
1.1 schwarze 26: #include <fcntl.h>
27: #include <stdarg.h>
28: #include <stdio.h>
29: #include <stdlib.h>
30: #include <string.h>
31: #include <unistd.h>
1.115 schwarze 32: #include <zlib.h>
1.1 schwarze 33:
1.108 schwarze 34: #include "mandoc_aux.h"
1.1 schwarze 35: #include "mandoc.h"
1.108 schwarze 36: #include "roff.h"
1.1 schwarze 37: #include "mdoc.h"
38: #include "man.h"
1.174 schwarze 39: #include "mandoc_parse.h"
1.108 schwarze 40: #include "libmandoc.h"
1.173 schwarze 41: #include "roff_int.h"
1.1 schwarze 42:
43: #define REPARSE_LIMIT 1000
44:
45: struct mparse {
1.133 schwarze 46: struct roff *roff; /* roff parser (!NULL) */
1.109 schwarze 47: struct roff_man *man; /* man parser */
1.59 schwarze 48: struct buf *primary; /* buffer currently being parsed */
1.170 schwarze 49: struct buf *secondary; /* copy of top level input */
1.171 schwarze 50: struct buf *loop; /* open .while request line */
1.151 schwarze 51: const char *os_s; /* default operating system */
1.59 schwarze 52: int options; /* parser options */
1.115 schwarze 53: int gzip; /* current input file is gzipped */
1.70 schwarze 54: int filenc; /* encoding of the current file */
1.1 schwarze 55: int reparse_count; /* finite interp. stack */
1.59 schwarze 56: int line; /* line number in the file */
1.1 schwarze 57: };
58:
1.60 schwarze 59: static void choose_parser(struct mparse *);
1.170 schwarze 60: static void free_buf_list(struct buf *);
1.1 schwarze 61: static void resize_buf(struct buf *, size_t);
1.171 schwarze 62: static int mparse_buf_r(struct mparse *, struct buf, size_t, int);
1.175 schwarze 63: static int read_whole_file(struct mparse *, int, struct buf *, int *);
1.1 schwarze 64: static void mparse_end(struct mparse *);
65:
1.25 schwarze 66:
1.1 schwarze 67: static void
68: resize_buf(struct buf *buf, size_t initial)
69: {
70:
71: buf->sz = buf->sz > initial/2 ? 2 * buf->sz : initial;
72: buf->buf = mandoc_realloc(buf->buf, buf->sz);
73: }
74:
75: static void
1.170 schwarze 76: free_buf_list(struct buf *buf)
77: {
78: struct buf *tmp;
79:
80: while (buf != NULL) {
81: tmp = buf;
82: buf = tmp->next;
83: free(tmp->buf);
84: free(tmp);
85: }
86: }
87:
88: static void
1.60 schwarze 89: choose_parser(struct mparse *curp)
1.1 schwarze 90: {
1.59 schwarze 91: char *cp, *ep;
92: int format;
1.1 schwarze 93:
1.59 schwarze 94: /*
95: * If neither command line arguments -mdoc or -man select
96: * a parser nor the roff parser found a .Dd or .TH macro
97: * yet, look ahead in the main input buffer.
98: */
99:
100: if ((format = roff_getformat(curp->roff)) == 0) {
101: cp = curp->primary->buf;
102: ep = cp + curp->primary->sz;
103: while (cp < ep) {
1.61 schwarze 104: if (*cp == '.' || *cp == '\'') {
1.59 schwarze 105: cp++;
106: if (cp[0] == 'D' && cp[1] == 'd') {
107: format = MPARSE_MDOC;
108: break;
109: }
110: if (cp[0] == 'T' && cp[1] == 'H') {
111: format = MPARSE_MAN;
112: break;
113: }
114: }
115: cp = memchr(cp, '\n', ep - cp);
116: if (cp == NULL)
117: break;
118: cp++;
119: }
1.1 schwarze 120: }
121:
1.59 schwarze 122: if (format == MPARSE_MDOC) {
1.180 schwarze 123: curp->man->meta.macroset = MACROSET_MDOC;
1.136 schwarze 124: if (curp->man->mdocmac == NULL)
125: curp->man->mdocmac = roffhash_alloc(MDOC_Dd, MDOC_MAX);
1.112 schwarze 126: } else {
1.180 schwarze 127: curp->man->meta.macroset = MACROSET_MAN;
1.136 schwarze 128: if (curp->man->manmac == NULL)
129: curp->man->manmac = roffhash_alloc(MAN_TH, MAN_MAX);
1.25 schwarze 130: }
1.180 schwarze 131: curp->man->meta.first->tok = TOKEN_NONE;
1.1 schwarze 132: }
133:
134: /*
1.71 schwarze 135: * Main parse routine for a buffer.
136: * It assumes encoding and line numbering are already set up.
137: * It can recurse directly (for invocations of user-defined
138: * macros, inline equations, and input line traps)
139: * and indirectly (for .so file inclusion).
1.1 schwarze 140: */
1.171 schwarze 141: static int
1.71 schwarze 142: mparse_buf_r(struct mparse *curp, struct buf blk, size_t i, int start)
1.1 schwarze 143: {
144: struct buf ln;
1.171 schwarze 145: struct buf *firstln, *lastln, *thisln, *loop;
1.85 schwarze 146: char *cp;
1.71 schwarze 147: size_t pos; /* byte number in the ln buffer */
1.171 schwarze 148: int line_result, result;
1.76 schwarze 149: int of;
1.1 schwarze 150: int lnn; /* line number in the real file */
1.85 schwarze 151: int fd;
1.171 schwarze 152: int inloop; /* Saw .while on this level. */
1.1 schwarze 153: unsigned char c;
154:
1.170 schwarze 155: ln.sz = 256;
156: ln.buf = mandoc_malloc(ln.sz);
157: ln.next = NULL;
1.171 schwarze 158: firstln = loop = NULL;
1.25 schwarze 159: lnn = curp->line;
160: pos = 0;
1.171 schwarze 161: inloop = 0;
1.170 schwarze 162: result = ROFF_CONT;
1.1 schwarze 163:
1.171 schwarze 164: while (i < blk.sz && (blk.buf[i] != '\0' || pos != 0)) {
1.1 schwarze 165: if (start) {
166: curp->line = lnn;
167: curp->reparse_count = 0;
1.70 schwarze 168:
169: if (lnn < 3 &&
170: curp->filenc & MPARSE_UTF8 &&
1.71 schwarze 171: curp->filenc & MPARSE_LATIN1)
172: curp->filenc = preconv_cue(&blk, i);
1.1 schwarze 173: }
174:
1.71 schwarze 175: while (i < blk.sz && (start || blk.buf[i] != '\0')) {
1.1 schwarze 176:
177: /*
178: * When finding an unescaped newline character,
179: * leave the character loop to process the line.
180: * Skip a preceding carriage return, if any.
181: */
182:
1.71 schwarze 183: if ('\r' == blk.buf[i] && i + 1 < blk.sz &&
1.1 schwarze 184: '\n' == blk.buf[i + 1])
185: ++i;
186: if ('\n' == blk.buf[i]) {
187: ++i;
188: ++lnn;
189: break;
190: }
191:
1.13 schwarze 192: /*
1.70 schwarze 193: * Make sure we have space for the worst
1.170 schwarze 194: * case of 12 bytes: "\\[u10ffff]\n\0"
1.13 schwarze 195: */
196:
1.170 schwarze 197: if (pos + 12 > ln.sz)
1.13 schwarze 198: resize_buf(&ln, 256);
199:
1.25 schwarze 200: /*
1.70 schwarze 201: * Encode 8-bit input.
1.1 schwarze 202: */
203:
1.70 schwarze 204: c = blk.buf[i];
205: if (c & 0x80) {
1.71 schwarze 206: if ( ! (curp->filenc && preconv_encode(
207: &blk, &i, &ln, &pos, &curp->filenc))) {
1.177 schwarze 208: mandoc_msg(MANDOCERR_CHAR_BAD,
1.89 schwarze 209: curp->line, pos, "0x%x", c);
1.70 schwarze 210: ln.buf[pos++] = '?';
211: i++;
212: }
213: continue;
214: }
215:
216: /*
217: * Exclude control characters.
218: */
1.1 schwarze 219:
1.70 schwarze 220: if (c == 0x7f || (c < 0x20 && c != 0x09)) {
1.177 schwarze 221: mandoc_msg(c == 0x00 || c == 0x04 ||
1.89 schwarze 222: c > 0x0a ? MANDOCERR_CHAR_BAD :
223: MANDOCERR_CHAR_UNSUPP,
1.177 schwarze 224: curp->line, pos, "0x%x", c);
1.1 schwarze 225: i++;
1.102 schwarze 226: if (c != '\r')
227: ln.buf[pos++] = '?';
1.1 schwarze 228: continue;
229: }
230:
231: ln.buf[pos++] = blk.buf[i++];
232: }
1.170 schwarze 233: ln.buf[pos] = '\0';
234:
235: /*
236: * Maintain a lookaside buffer of all lines.
237: * parsed from this input source.
238: */
239:
240: thisln = mandoc_malloc(sizeof(*thisln));
241: thisln->buf = mandoc_strdup(ln.buf);
242: thisln->sz = strlen(ln.buf) + 1;
243: thisln->next = NULL;
244: if (firstln == NULL) {
245: firstln = lastln = thisln;
246: if (curp->secondary == NULL)
247: curp->secondary = firstln;
248: } else {
249: lastln->next = thisln;
250: lastln = thisln;
251: }
1.1 schwarze 252:
1.170 schwarze 253: /* XXX Ugly hack to mark the end of the input. */
1.1 schwarze 254:
1.170 schwarze 255: if (i == blk.sz || blk.buf[i] == '\0') {
1.142 schwarze 256: ln.buf[pos++] = '\n';
1.170 schwarze 257: ln.buf[pos] = '\0';
258: }
1.1 schwarze 259:
260: /*
261: * A significant amount of complexity is contained by
262: * the roff preprocessor. It's line-oriented but can be
263: * expressed on one line, so we need at times to
264: * readjust our starting point and re-run it. The roff
265: * preprocessor can also readjust the buffers with new
266: * data, so we pass them in wholesale.
267: */
268:
269: of = 0;
270: rerun:
1.169 schwarze 271: line_result = roff_parseln(curp->roff, curp->line, &ln, &of);
1.1 schwarze 272:
1.171 schwarze 273: /* Process options. */
274:
275: if (line_result & ROFF_APPEND)
276: assert(line_result == (ROFF_IGN | ROFF_APPEND));
277:
278: if (line_result & ROFF_USERCALL)
279: assert((line_result & ROFF_MASK) == ROFF_REPARSE);
280:
281: if (line_result & ROFF_USERRET) {
282: assert(line_result == (ROFF_IGN | ROFF_USERRET));
283: if (start == 0) {
284: /* Return from the current macro. */
285: result = ROFF_USERRET;
286: goto out;
287: }
288: }
289:
290: switch (line_result & ROFF_LOOPMASK) {
291: case ROFF_IGN:
292: break;
293: case ROFF_WHILE:
294: if (curp->loop != NULL) {
295: if (loop == curp->loop)
296: break;
297: mandoc_msg(MANDOCERR_WHILE_NEST,
1.177 schwarze 298: curp->line, pos, NULL);
1.171 schwarze 299: }
300: curp->loop = thisln;
301: loop = NULL;
302: inloop = 1;
303: break;
304: case ROFF_LOOPCONT:
305: case ROFF_LOOPEXIT:
306: if (curp->loop == NULL) {
307: mandoc_msg(MANDOCERR_WHILE_FAIL,
1.177 schwarze 308: curp->line, pos, NULL);
1.171 schwarze 309: break;
310: }
311: if (inloop == 0) {
312: mandoc_msg(MANDOCERR_WHILE_INTO,
1.177 schwarze 313: curp->line, pos, NULL);
1.171 schwarze 314: curp->loop = loop = NULL;
315: break;
316: }
317: if (line_result & ROFF_LOOPCONT)
318: loop = curp->loop;
319: else {
320: curp->loop = loop = NULL;
321: inloop = 0;
322: }
323: break;
324: default:
325: abort();
326: }
327:
328: /* Process the main instruction from the roff parser. */
329:
330: switch (line_result & ROFF_MASK) {
331: case ROFF_IGN:
332: break;
333: case ROFF_CONT:
1.180 schwarze 334: if (curp->man->meta.macroset == MACROSET_NONE)
1.171 schwarze 335: choose_parser(curp);
1.180 schwarze 336: if ((curp->man->meta.macroset == MACROSET_MDOC ?
1.171 schwarze 337: mdoc_parseln(curp->man, curp->line, ln.buf, of) :
338: man_parseln(curp->man, curp->line, ln.buf, of)
339: ) == 2)
340: goto out;
341: break;
342: case ROFF_RERUN:
343: goto rerun;
1.25 schwarze 344: case ROFF_REPARSE:
1.169 schwarze 345: if (++curp->reparse_count > REPARSE_LIMIT) {
1.171 schwarze 346: /* Abort and return to the top level. */
1.170 schwarze 347: result = ROFF_IGN;
1.177 schwarze 348: mandoc_msg(MANDOCERR_ROFFLOOP,
1.25 schwarze 349: curp->line, pos, NULL);
1.171 schwarze 350: goto out;
1.169 schwarze 351: }
1.171 schwarze 352: result = mparse_buf_r(curp, ln, of, 0);
353: if (line_result & ROFF_USERCALL) {
354: roff_userret(curp->roff);
355: /* Continue normally. */
356: if (result & ROFF_USERRET)
357: result = ROFF_CONT;
1.135 schwarze 358: }
1.171 schwarze 359: if (start == 0 && result != ROFF_CONT)
360: goto out;
361: break;
1.25 schwarze 362: case ROFF_SO:
1.71 schwarze 363: if ( ! (curp->options & MPARSE_SO) &&
364: (i >= blk.sz || blk.buf[i] == '\0')) {
1.180 schwarze 365: curp->man->meta.sodest =
366: mandoc_strdup(ln.buf + of);
1.170 schwarze 367: goto out;
1.23 schwarze 368: }
1.122 schwarze 369: if ((fd = mparse_open(curp, ln.buf + of)) != -1) {
1.85 schwarze 370: mparse_readfd(curp, fd, ln.buf + of);
1.121 schwarze 371: close(fd);
1.88 schwarze 372: } else {
1.179 schwarze 373: mandoc_msg(MANDOCERR_SO_FAIL,
374: curp->line, of, ".so %s: %s",
375: ln.buf + of, strerror(errno));
1.85 schwarze 376: ln.sz = mandoc_asprintf(&cp,
377: ".sp\nSee the file %s.\n.sp",
378: ln.buf + of);
379: free(ln.buf);
380: ln.buf = cp;
381: of = 0;
382: mparse_buf_r(curp, ln, of, 0);
1.30 schwarze 383: }
1.171 schwarze 384: break;
1.1 schwarze 385: default:
1.171 schwarze 386: abort();
1.1 schwarze 387: }
388:
1.171 schwarze 389: /* Start the next input line. */
1.1 schwarze 390:
1.171 schwarze 391: if (loop != NULL &&
392: (line_result & ROFF_LOOPMASK) == ROFF_IGN)
393: loop = loop->next;
394:
395: if (loop != NULL) {
396: if ((line_result & ROFF_APPEND) == 0)
397: *ln.buf = '\0';
398: if (ln.sz < loop->sz)
399: resize_buf(&ln, loop->sz);
400: (void)strlcat(ln.buf, loop->buf, ln.sz);
401: of = 0;
402: goto rerun;
403: }
1.1 schwarze 404:
1.171 schwarze 405: pos = (line_result & ROFF_APPEND) ? strlen(ln.buf) : 0;
1.1 schwarze 406: }
1.170 schwarze 407: out:
1.171 schwarze 408: if (inloop) {
409: if (result != ROFF_USERRET)
1.177 schwarze 410: mandoc_msg(MANDOCERR_WHILE_OUTOF,
1.171 schwarze 411: curp->line, pos, NULL);
412: curp->loop = NULL;
413: }
1.1 schwarze 414: free(ln.buf);
1.170 schwarze 415: if (firstln != curp->secondary)
416: free_buf_list(firstln);
417: return result;
1.1 schwarze 418: }
419:
420: static int
1.175 schwarze 421: read_whole_file(struct mparse *curp, int fd, struct buf *fb, int *with_mmap)
1.1 schwarze 422: {
423: struct stat st;
1.115 schwarze 424: gzFile gz;
1.1 schwarze 425: size_t off;
426: ssize_t ssz;
1.166 schwarze 427: int gzerrnum, retval;
1.1 schwarze 428:
1.164 schwarze 429: if (fstat(fd, &st) == -1) {
1.177 schwarze 430: mandoc_msg(MANDOCERR_FILE, 0, 0,
1.164 schwarze 431: "fstat: %s", strerror(errno));
432: return 0;
433: }
1.1 schwarze 434:
435: /*
436: * If we're a regular file, try just reading in the whole entry
437: * via mmap(). This is faster than reading it into blocks, and
438: * since each file is only a few bytes to begin with, I'm not
439: * concerned that this is going to tank any machines.
440: */
441:
1.115 schwarze 442: if (curp->gzip == 0 && S_ISREG(st.st_mode)) {
1.106 schwarze 443: if (st.st_size > 0x7fffffff) {
1.177 schwarze 444: mandoc_msg(MANDOCERR_TOOLARGE, 0, 0, NULL);
1.117 schwarze 445: return 0;
1.1 schwarze 446: }
447: *with_mmap = 1;
448: fb->sz = (size_t)st.st_size;
1.15 schwarze 449: fb->buf = mmap(NULL, fb->sz, PROT_READ, MAP_SHARED, fd, 0);
1.1 schwarze 450: if (fb->buf != MAP_FAILED)
1.117 schwarze 451: return 1;
1.1 schwarze 452: }
453:
1.115 schwarze 454: if (curp->gzip) {
1.166 schwarze 455: /*
456: * Duplicating the file descriptor is required
457: * because we will have to call gzclose(3)
458: * to free memory used internally by zlib,
459: * but that will also close the file descriptor,
460: * which this function must not do.
461: */
462: if ((fd = dup(fd)) == -1) {
1.177 schwarze 463: mandoc_msg(MANDOCERR_FILE, 0, 0,
1.166 schwarze 464: "dup: %s", strerror(errno));
465: return 0;
466: }
1.164 schwarze 467: if ((gz = gzdopen(fd, "rb")) == NULL) {
1.177 schwarze 468: mandoc_msg(MANDOCERR_FILE, 0, 0,
1.164 schwarze 469: "gzdopen: %s", strerror(errno));
1.166 schwarze 470: close(fd);
1.164 schwarze 471: return 0;
472: }
1.115 schwarze 473: } else
474: gz = NULL;
475:
1.1 schwarze 476: /*
477: * If this isn't a regular file (like, say, stdin), then we must
478: * go the old way and just read things in bit by bit.
479: */
480:
481: *with_mmap = 0;
482: off = 0;
1.166 schwarze 483: retval = 0;
1.1 schwarze 484: fb->sz = 0;
485: fb->buf = NULL;
486: for (;;) {
487: if (off == fb->sz) {
488: if (fb->sz == (1U << 31)) {
1.177 schwarze 489: mandoc_msg(MANDOCERR_TOOLARGE, 0, 0, NULL);
1.1 schwarze 490: break;
491: }
492: resize_buf(fb, 65536);
493: }
1.115 schwarze 494: ssz = curp->gzip ?
495: gzread(gz, fb->buf + (int)off, fb->sz - off) :
496: read(fd, fb->buf + (int)off, fb->sz - off);
1.1 schwarze 497: if (ssz == 0) {
498: fb->sz = off;
1.166 schwarze 499: retval = 1;
500: break;
1.1 schwarze 501: }
1.164 schwarze 502: if (ssz == -1) {
1.166 schwarze 503: if (curp->gzip)
504: (void)gzerror(gz, &gzerrnum);
1.177 schwarze 505: mandoc_msg(MANDOCERR_FILE, 0, 0, "read: %s",
1.166 schwarze 506: curp->gzip && gzerrnum != Z_ERRNO ?
507: zError(gzerrnum) : strerror(errno));
1.164 schwarze 508: break;
509: }
1.1 schwarze 510: off += (size_t)ssz;
511: }
512:
1.166 schwarze 513: if (curp->gzip && (gzerrnum = gzclose(gz)) != Z_OK)
1.177 schwarze 514: mandoc_msg(MANDOCERR_FILE, 0, 0, "gzclose: %s",
1.166 schwarze 515: gzerrnum == Z_ERRNO ? strerror(errno) :
516: zError(gzerrnum));
517: if (retval == 0) {
518: free(fb->buf);
519: fb->buf = NULL;
520: }
521: return retval;
1.1 schwarze 522: }
523:
524: static void
525: mparse_end(struct mparse *curp)
526: {
1.180 schwarze 527: if (curp->man->meta.macroset == MACROSET_NONE)
528: curp->man->meta.macroset = MACROSET_MAN;
529: if (curp->man->meta.macroset == MACROSET_MDOC)
1.110 schwarze 530: mdoc_endparse(curp->man);
531: else
1.86 schwarze 532: man_endparse(curp->man);
1.1 schwarze 533: roff_endparse(curp->roff);
534: }
535:
1.176 schwarze 536: /*
537: * Read the whole file into memory and call the parsers.
538: * Called recursively when an .so request is encountered.
539: */
540: void
541: mparse_readfd(struct mparse *curp, int fd, const char *filename)
1.1 schwarze 542: {
1.176 schwarze 543: static int recursion_depth;
544:
545: struct buf blk;
546: struct buf *save_primary;
547: const char *save_filename;
1.71 schwarze 548: size_t offset;
1.176 schwarze 549: int save_filenc, save_lineno;
550: int with_mmap;
1.14 schwarze 551:
1.176 schwarze 552: if (recursion_depth > 64) {
1.177 schwarze 553: mandoc_msg(MANDOCERR_ROFFLOOP, curp->line, 0, NULL);
1.15 schwarze 554: return;
1.14 schwarze 555: }
1.176 schwarze 556: if (read_whole_file(curp, fd, &blk, &with_mmap) == 0)
557: return;
558:
559: /*
560: * Save some properties of the parent file.
561: */
562:
563: save_primary = curp->primary;
564: save_filenc = curp->filenc;
565: save_lineno = curp->line;
566: save_filename = mandoc_msg_getinfilename();
1.1 schwarze 567:
1.59 schwarze 568: curp->primary = &blk;
1.176 schwarze 569: curp->filenc = curp->options & (MPARSE_UTF8 | MPARSE_LATIN1);
1.15 schwarze 570: curp->line = 1;
1.176 schwarze 571: mandoc_msg_setinfilename(filename);
1.15 schwarze 572:
1.70 schwarze 573: /* Skip an UTF-8 byte order mark. */
574: if (curp->filenc & MPARSE_UTF8 && blk.sz > 2 &&
575: (unsigned char)blk.buf[0] == 0xef &&
576: (unsigned char)blk.buf[1] == 0xbb &&
577: (unsigned char)blk.buf[2] == 0xbf) {
1.71 schwarze 578: offset = 3;
1.70 schwarze 579: curp->filenc &= ~MPARSE_LATIN1;
1.71 schwarze 580: } else
581: offset = 0;
1.70 schwarze 582:
1.176 schwarze 583: recursion_depth++;
1.71 schwarze 584: mparse_buf_r(curp, blk, offset, 1);
1.86 schwarze 585: if (--recursion_depth == 0)
1.15 schwarze 586: mparse_end(curp);
587:
1.176 schwarze 588: /*
589: * Clean up and restore saved parent properties.
590: */
1.15 schwarze 591:
1.176 schwarze 592: if (with_mmap)
593: munmap(blk.buf, blk.sz);
594: else
595: free(blk.buf);
1.1 schwarze 596:
1.176 schwarze 597: curp->primary = save_primary;
598: curp->filenc = save_filenc;
599: curp->line = save_lineno;
600: if (save_filename != NULL)
601: mandoc_msg_setinfilename(save_filename);
1.58 schwarze 602: }
603:
1.122 schwarze 604: int
605: mparse_open(struct mparse *curp, const char *file)
1.58 schwarze 606: {
607: char *cp;
1.182 ! schwarze 608: int fd, save_errno;
1.58 schwarze 609:
1.115 schwarze 610: cp = strrchr(file, '.');
611: curp->gzip = (cp != NULL && ! strcmp(cp + 1, "gz"));
1.74 schwarze 612:
1.115 schwarze 613: /* First try to use the filename as it is. */
1.74 schwarze 614:
1.122 schwarze 615: if ((fd = open(file, O_RDONLY)) != -1)
616: return fd;
1.74 schwarze 617:
1.115 schwarze 618: /*
619: * If that doesn't work and the filename doesn't
620: * already end in .gz, try appending .gz.
621: */
1.74 schwarze 622:
1.115 schwarze 623: if ( ! curp->gzip) {
1.182 ! schwarze 624: save_errno = errno;
1.74 schwarze 625: mandoc_asprintf(&cp, "%s.gz", file);
1.123 schwarze 626: fd = open(cp, O_RDONLY);
1.83 schwarze 627: free(cp);
1.182 ! schwarze 628: errno = save_errno;
1.122 schwarze 629: if (fd != -1) {
1.115 schwarze 630: curp->gzip = 1;
1.122 schwarze 631: return fd;
1.58 schwarze 632: }
633: }
634:
1.115 schwarze 635: /* Neither worked, give up. */
1.73 schwarze 636:
1.122 schwarze 637: return -1;
1.1 schwarze 638: }
639:
640: struct mparse *
1.175 schwarze 641: mparse_alloc(int options, enum mandoc_os os_e, const char *os_s)
1.1 schwarze 642: {
643: struct mparse *curp;
644:
645: curp = mandoc_calloc(1, sizeof(struct mparse));
646:
1.22 schwarze 647: curp->options = options;
1.151 schwarze 648: curp->os_s = os_s;
1.1 schwarze 649:
1.178 schwarze 650: curp->roff = roff_alloc(options);
651: curp->man = roff_man_alloc(curp->roff, curp->os_s,
1.112 schwarze 652: curp->options & MPARSE_QUICK ? 1 : 0);
1.111 schwarze 653: if (curp->options & MPARSE_MDOC) {
1.180 schwarze 654: curp->man->meta.macroset = MACROSET_MDOC;
1.136 schwarze 655: if (curp->man->mdocmac == NULL)
656: curp->man->mdocmac = roffhash_alloc(MDOC_Dd, MDOC_MAX);
1.112 schwarze 657: } else if (curp->options & MPARSE_MAN) {
1.180 schwarze 658: curp->man->meta.macroset = MACROSET_MAN;
1.136 schwarze 659: if (curp->man->manmac == NULL)
660: curp->man->manmac = roffhash_alloc(MAN_TH, MAN_MAX);
1.111 schwarze 661: }
1.180 schwarze 662: curp->man->meta.first->tok = TOKEN_NONE;
1.151 schwarze 663: curp->man->meta.os_e = os_e;
1.117 schwarze 664: return curp;
1.1 schwarze 665: }
666:
667: void
668: mparse_reset(struct mparse *curp)
669: {
670: roff_reset(curp->roff);
1.124 schwarze 671: roff_man_reset(curp->man);
1.170 schwarze 672: free_buf_list(curp->secondary);
673: curp->secondary = NULL;
1.132 schwarze 674: curp->gzip = 0;
1.1 schwarze 675: }
676:
677: void
678: mparse_free(struct mparse *curp)
679: {
1.136 schwarze 680: roffhash_free(curp->man->mdocmac);
681: roffhash_free(curp->man->manmac);
1.112 schwarze 682: roff_man_free(curp->man);
1.133 schwarze 683: roff_free(curp->roff);
1.170 schwarze 684: free_buf_list(curp->secondary);
1.1 schwarze 685: free(curp);
686: }
687:
1.180 schwarze 688: struct roff_meta *
689: mparse_result(struct mparse *curp)
1.1 schwarze 690: {
1.181 schwarze 691: roff_state_reset(curp->man);
1.180 schwarze 692: if (curp->options & MPARSE_VALIDATE) {
693: if (curp->man->meta.macroset == MACROSET_MDOC)
694: mdoc_validate(curp->man);
695: else
696: man_validate(curp->man);
1.23 schwarze 697: }
1.180 schwarze 698: return &curp->man->meta;
1.4 schwarze 699: }
700:
701: void
1.170 schwarze 702: mparse_copy(const struct mparse *p)
1.4 schwarze 703: {
1.170 schwarze 704: struct buf *buf;
1.4 schwarze 705:
1.170 schwarze 706: for (buf = p->secondary; buf != NULL; buf = buf->next)
707: puts(buf->buf);
1.1 schwarze 708: }
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