4 * Read uncompressed and compressed metadata and file resources from a WIM file.
8 * Copyright (C) 2012, 2013 Eric Biggers
10 * This file is part of wimlib, a library for working with WIM files.
12 * wimlib is free software; you can redistribute it and/or modify it under the
13 * terms of the GNU General Public License as published by the Free Software
14 * Foundation; either version 3 of the License, or (at your option) any later
17 * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
18 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
19 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License along with
22 * wimlib; if not, see http://www.gnu.org/licenses/.
25 #include "wimlib_internal.h"
27 #include "lookup_table.h"
28 #include "buffer_io.h"
45 /* Write @n bytes from @buf to the file descriptor @fd, retrying on internupt
46 * and on short writes.
48 * Returns short count and set errno on failure. */
50 full_write(int fd, const void *buf, size_t n)
57 ret = write(fd, p, n);
70 /* Read @n bytes from the file descriptor @fd to the buffer @buf, retrying on
71 * internupt and on short reads.
73 * Returns short count and set errno on failure. */
75 full_read(int fd, void *buf, size_t n)
77 size_t bytes_remaining = n;
78 while (bytes_remaining) {
79 ssize_t bytes_read = read(fd, buf, bytes_remaining);
85 bytes_remaining -= bytes_read;
88 return n - bytes_remaining;
92 * Reads all or part of a compressed WIM resource.
94 * Returns zero on success, nonzero on failure.
97 read_compressed_resource(FILE *fp,
98 u64 resource_compressed_size,
99 u64 resource_uncompressed_size,
104 consume_data_callback_t cb,
113 int (*decompress)(const void *, unsigned, void *, unsigned);
114 /* Set the appropriate decompress function. */
115 if (resource_ctype == WIMLIB_COMPRESSION_TYPE_LZX)
116 decompress = wimlib_lzx_decompress;
118 decompress = wimlib_xpress_decompress;
120 /* The structure of a compressed resource consists of a table of chunk
121 * offsets followed by the chunks themselves. Each chunk consists of
122 * compressed data, and there is one chunk for each WIM_CHUNK_SIZE =
123 * 32768 bytes of the uncompressed file, with the last chunk having any
126 * The chunk offsets are measured relative to the end of the chunk
127 * table. The first chunk is omitted from the table in the WIM file
128 * because its offset is implicitly given by the fact that it directly
129 * follows the chunk table and therefore must have an offset of 0.
132 /* Calculate how many chunks the resource consists of in its entirety.
134 u64 num_chunks = (resource_uncompressed_size + WIM_CHUNK_SIZE - 1) /
136 /* As mentioned, the first chunk has no entry in the chunk table. */
137 u64 num_chunk_entries = num_chunks - 1;
140 /* The index of the chunk that the read starts at. */
141 u64 start_chunk = offset / WIM_CHUNK_SIZE;
142 /* The byte offset at which the read starts, within the start chunk. */
143 u64 start_chunk_offset = offset % WIM_CHUNK_SIZE;
145 /* The index of the chunk that contains the last byte of the read. */
146 u64 end_chunk = (offset + len - 1) / WIM_CHUNK_SIZE;
147 /* The byte offset of the last byte of the read, within the end chunk */
148 u64 end_chunk_offset = (offset + len - 1) % WIM_CHUNK_SIZE;
150 /* Number of chunks that are actually needed to read the requested part
152 u64 num_needed_chunks = end_chunk - start_chunk + 1;
154 /* If the end chunk is not the last chunk, an extra chunk entry is
155 * needed because we need to know the offset of the chunk after the last
156 * chunk read to figure out the size of the last read chunk. */
157 if (end_chunk != num_chunks - 1)
160 /* Allocate the chunk table. It will only contain offsets for the
161 * chunks that are actually needed for this read. */
163 bool chunk_offsets_malloced;
164 if (num_needed_chunks < 1000) {
165 chunk_offsets = alloca(num_needed_chunks * sizeof(u64));
166 chunk_offsets_malloced = false;
168 chunk_offsets = malloc(num_needed_chunks * sizeof(u64));
169 if (!chunk_offsets) {
170 ERROR("Failed to allocate chunk table "
171 "with %"PRIu64" entries", num_needed_chunks);
172 return WIMLIB_ERR_NOMEM;
174 chunk_offsets_malloced = true;
177 /* Set the implicit offset of the first chunk if it is included in the
180 * Note: M$'s documentation includes a picture that shows the first
181 * chunk starting right after the chunk entry table, labeled as offset
182 * 0x10. However, in the actual file format, the offset is measured
183 * from the end of the chunk entry table, so the first chunk has an
185 if (start_chunk == 0)
186 chunk_offsets[0] = 0;
188 /* According to M$'s documentation, if the uncompressed size of
189 * the file is greater than 4 GB, the chunk entries are 8-byte
190 * integers. Otherwise, they are 4-byte integers. */
191 u64 chunk_entry_size = (resource_uncompressed_size >= (u64)1 << 32) ?
194 /* Size of the full chunk table in the WIM file. */
195 u64 chunk_table_size = chunk_entry_size * num_chunk_entries;
197 /* Read the needed chunk offsets from the table in the WIM file. */
199 /* Index, in the WIM file, of the first needed entry in the
201 u64 start_table_idx = (start_chunk == 0) ? 0 : start_chunk - 1;
203 /* Number of entries we need to actually read from the chunk
204 * table (excludes the implicit first chunk). */
205 u64 num_needed_chunk_entries = (start_chunk == 0) ?
206 num_needed_chunks - 1 : num_needed_chunks;
208 /* Skip over unneeded chunk table entries. */
209 u64 file_offset_of_needed_chunk_entries = resource_offset +
210 start_table_idx * chunk_entry_size;
211 if (fseeko(fp, file_offset_of_needed_chunk_entries, SEEK_SET))
214 /* Number of bytes we need to read from the chunk table. */
215 size_t size = num_needed_chunk_entries * chunk_entry_size;
217 /* Read the raw data into the end of the chunk_offsets array to
218 * avoid allocating another array. */
219 void *chunk_tab_buf = (void*)&chunk_offsets[num_needed_chunks] - size;
221 if (fread(chunk_tab_buf, 1, size, fp) != size)
224 /* Now fill in chunk_offsets from the entries we have read in
227 u64 *chunk_tab_p = chunk_offsets;
228 if (start_chunk == 0)
231 if (chunk_entry_size == 4) {
232 u32 *entries = (u32*)chunk_tab_buf;
233 while (num_needed_chunk_entries--)
234 *chunk_tab_p++ = le32_to_cpu(*entries++);
236 u64 *entries = (u64*)chunk_tab_buf;
237 while (num_needed_chunk_entries--)
238 *chunk_tab_p++ = le64_to_cpu(*entries++);
241 /* Done with the chunk table now. We must now seek to the first chunk
242 * that is needed for the read. */
244 u64 file_offset_of_first_needed_chunk = resource_offset +
245 chunk_table_size + chunk_offsets[0];
246 if (fseeko(fp, file_offset_of_first_needed_chunk, SEEK_SET))
249 /* Pointer to current position in the output buffer for uncompressed
250 * data. Alternatively, if using a callback function, we repeatedly
251 * fill a temporary buffer to feed data into the callback function. */
254 out_p = alloca(WIM_CHUNK_SIZE);
258 /* Buffer for compressed data. While most compressed chunks will have a
259 * size much less than WIM_CHUNK_SIZE, WIM_CHUNK_SIZE - 1 is the maximum
260 * size in the worst-case. This assumption is valid only if chunks that
261 * happen to compress to more than the uncompressed size (i.e. a
262 * sequence of random bytes) are always stored uncompressed. But this seems
263 * to be the case in M$'s WIM files, even though it is undocumented. */
264 void *compressed_buf = alloca(WIM_CHUNK_SIZE - 1);
266 /* Decompress all the chunks. */
267 for (u64 i = start_chunk; i <= end_chunk; i++) {
269 /* Calculate the sizes of the compressed chunk and of the
270 * uncompressed chunk. */
271 unsigned compressed_chunk_size;
272 unsigned uncompressed_chunk_size;
273 if (i != num_chunks - 1) {
274 /* All the chunks except the last one in the resource
275 * expand to WIM_CHUNK_SIZE uncompressed, and the amount
276 * of compressed data for the chunk is given by the
277 * difference of offsets in the chunk offset table. */
278 compressed_chunk_size = chunk_offsets[i + 1 - start_chunk] -
279 chunk_offsets[i - start_chunk];
280 uncompressed_chunk_size = WIM_CHUNK_SIZE;
282 /* The last compressed chunk consists of the remaining
283 * bytes in the file resource, and the last uncompressed
284 * chunk has size equal to however many bytes are left-
285 * that is, the remainder of the uncompressed size when
286 * divided by WIM_CHUNK_SIZE.
288 * Note that the resource_compressed_size includes the
289 * chunk table, so the size of it must be subtracted. */
290 compressed_chunk_size = resource_compressed_size -
292 chunk_offsets[i - start_chunk];
294 uncompressed_chunk_size = resource_uncompressed_size %
297 /* If the remainder is 0, the last chunk actually
298 * uncompresses to a full WIM_CHUNK_SIZE bytes. */
299 if (uncompressed_chunk_size == 0)
300 uncompressed_chunk_size = WIM_CHUNK_SIZE;
303 /* Figure out how much of this chunk we actually need to read */
305 if (i == start_chunk)
306 start_offset = start_chunk_offset;
311 end_offset = end_chunk_offset;
313 end_offset = WIM_CHUNK_SIZE - 1;
315 unsigned partial_chunk_size = end_offset + 1 - start_offset;
316 bool is_partial_chunk = (partial_chunk_size != uncompressed_chunk_size);
318 /* This is undocumented, but chunks can be uncompressed. This
319 * appears to always be the case when the compressed chunk size
320 * is equal to the uncompressed chunk size. */
321 if (compressed_chunk_size == uncompressed_chunk_size) {
322 /* Uncompressed chunk */
323 if (start_offset != 0)
324 if (fseeko(fp, start_offset, SEEK_CUR))
326 if (fread(cb ? out_p + start_offset : out_p,
327 1, partial_chunk_size, fp) != partial_chunk_size)
330 /* Compressed chunk */
332 /* Read the compressed data into compressed_buf. */
333 if (fread(compressed_buf, 1, compressed_chunk_size,
334 fp) != compressed_chunk_size)
337 /* For partial chunks and when writing directly to a
338 * buffer, we must buffer the uncompressed data because
339 * we don't need all of it. */
340 if (is_partial_chunk && !cb) {
341 u8 uncompressed_buf[uncompressed_chunk_size];
343 ret = decompress(compressed_buf,
344 compressed_chunk_size,
346 uncompressed_chunk_size);
348 ret = WIMLIB_ERR_DECOMPRESSION;
351 memcpy(out_p, uncompressed_buf + start_offset,
354 ret = decompress(compressed_buf,
355 compressed_chunk_size,
357 uncompressed_chunk_size);
359 ret = WIMLIB_ERR_DECOMPRESSION;
365 /* Feed the data to the callback function */
366 ret = cb(out_p + start_offset,
367 partial_chunk_size, ctx_or_buf);
371 /* No callback function provided; we are writing
372 * directly to a buffer. Advance the pointer into this
373 * buffer by the number of uncompressed bytes that were
375 out_p += partial_chunk_size;
381 if (chunk_offsets_malloced)
387 ERROR("Unexpected EOF in compressed file resource");
389 ERROR_WITH_ERRNO("Error reading compressed file resource");
390 ret = WIMLIB_ERR_READ;
395 * Reads uncompressed data from an open file stream.
398 read_uncompressed_resource(FILE *fp, u64 offset, u64 len, void *contents_ret)
400 if (fseeko(fp, offset, SEEK_SET) != 0) {
401 ERROR("Failed to seek to byte %"PRIu64" of input file "
402 "to read uncompressed resource (len = %"PRIu64")",
404 return WIMLIB_ERR_READ;
406 if (fread(contents_ret, 1, len, fp) != len) {
408 ERROR("Unexpected EOF in uncompressed file resource");
410 ERROR("Failed to read %"PRIu64" bytes from "
411 "uncompressed resource at offset %"PRIu64,
414 return WIMLIB_ERR_READ;
419 /* Reads the contents of a struct resource_entry, as represented in the on-disk
420 * format, from the memory pointed to by @p, and fills in the fields of @entry.
421 * A pointer to the byte after the memory read at @p is returned. */
423 get_resource_entry(const void *p, struct resource_entry *entry)
428 p = get_u56(p, &size);
429 p = get_u8(p, &flags);
431 entry->flags = flags;
433 /* offset and original_size are truncated to 62 bits to avoid possible
434 * overflows, when converting to a signed 64-bit integer (off_t) or when
435 * adding size or original_size. This is okay since no one would ever
436 * actually have a WIM bigger than 4611686018427387903 bytes... */
437 p = get_u64(p, &entry->offset);
438 if (entry->offset & 0xc000000000000000ULL) {
439 WARNING("Truncating offset in resource entry");
440 entry->offset &= 0x3fffffffffffffffULL;
442 p = get_u64(p, &entry->original_size);
443 if (entry->original_size & 0xc000000000000000ULL) {
444 WARNING("Truncating original_size in resource entry");
445 entry->original_size &= 0x3fffffffffffffffULL;
450 /* Copies the struct resource_entry @entry to the memory pointed to by @p in the
451 * on-disk format. A pointer to the byte after the memory written at @p is
454 put_resource_entry(void *p, const struct resource_entry *entry)
456 p = put_u56(p, entry->size);
457 p = put_u8(p, entry->flags);
458 p = put_u64(p, entry->offset);
459 p = put_u64(p, entry->original_size);
464 wim_get_fp(WIMStruct *w)
466 #if defined(WITH_FUSE) || defined(ENABLE_MULTITHREADED_COMPRESSION)
467 pthread_mutex_lock(&w->fp_tab_mutex);
470 wimlib_assert(w->filename != NULL);
472 for (size_t i = 0; i < w->num_allocated_fps; i++) {
479 DEBUG("Opening extra file descriptor to `%"TS"'", w->filename);
480 fp = tfopen(w->filename, T("rb"));
482 ERROR_WITH_ERRNO("Failed to open `%"TS"'", w->filename);
484 pthread_mutex_unlock(&w->fp_tab_mutex);
485 #else /* WITH_FUSE || ENABLE_MULTITHREADED_COMPRESSION */
487 #endif /* !WITH_FUSE && !ENABLE_MULTITHREADED_COMPRESSION */
492 wim_release_fp(WIMStruct *w, FILE *fp)
495 #if defined(WITH_FUSE) || defined(ENABLE_MULTITHREADED_COMPRESSION)
498 pthread_mutex_lock(&w->fp_tab_mutex);
500 for (size_t i = 0; i < w->num_allocated_fps; i++) {
501 if (w->fp_tab[i] == NULL) {
507 fp_tab = REALLOC(w->fp_tab, sizeof(FILE*) * (w->num_allocated_fps + 4));
509 ret = WIMLIB_ERR_NOMEM;
514 memset(&w->fp_tab[w->num_allocated_fps], 0, 4 * sizeof(FILE*));
515 w->fp_tab[w->num_allocated_fps] = fp;
516 w->num_allocated_fps += 4;
518 pthread_mutex_unlock(&w->fp_tab_mutex);
519 #endif /* WITH_FUSE || ENABLE_MULTITHREADED_COMPRESSION */
524 read_partial_wim_resource(const struct wim_lookup_table_entry *lte,
526 consume_data_callback_t cb,
535 wimlib_assert(lte->resource_location == RESOURCE_IN_WIM);
538 if (flags & WIMLIB_RESOURCE_FLAG_THREADSAFE_READ) {
539 wim_fp = wim_get_fp(wim);
541 ret = WIMLIB_ERR_READ;
545 wim_fp = lte->wim->fp;
548 if (lte->resource_entry.flags & WIM_RESHDR_FLAG_COMPRESSED &&
549 !(flags & WIMLIB_RESOURCE_FLAG_RAW))
551 ret = read_compressed_resource(wim_fp,
552 lte->resource_entry.size,
553 lte->resource_entry.original_size,
554 lte->resource_entry.offset,
555 wimlib_get_compression_type(wim),
561 offset += lte->resource_entry.offset;
563 if (fseeko(wim_fp, offset, SEEK_SET)) {
564 ERROR_WITH_ERRNO("Failed to seek to offset %"PRIu64
566 ret = WIMLIB_ERR_READ;
570 /* Send data to callback function */
571 u8 buf[min(WIM_CHUNK_SIZE, size)];
573 size_t bytes_to_read = min(WIM_CHUNK_SIZE, size);
574 size_t bytes_read = fread(buf, 1, bytes_to_read, wim_fp);
576 if (bytes_read != bytes_to_read)
578 ret = cb(buf, bytes_read, ctx_or_buf);
584 /* Send data directly to a buffer */
585 if (fread(ctx_or_buf, 1, size, wim_fp) != size)
593 ERROR_WITH_ERRNO("Error reading data from WIM");
595 ERROR("Unexpected EOF in WIM!");
596 ret = WIMLIB_ERR_READ;
598 if (flags & WIMLIB_RESOURCE_FLAG_THREADSAFE_READ) {
599 int ret2 = wim_release_fp(wim, wim_fp);
613 read_partial_wim_resource_into_buf(const struct wim_lookup_table_entry *lte,
614 size_t size, u64 offset, void *buf,
617 return read_partial_wim_resource(lte, size, NULL, buf,
618 threadsafe ? WIMLIB_RESOURCE_FLAG_THREADSAFE_READ : 0,
623 read_wim_resource_prefix(const struct wim_lookup_table_entry *lte,
625 consume_data_callback_t cb,
629 return read_partial_wim_resource(lte, size, cb, ctx_or_buf, flags, 0);
635 read_file_on_disk_prefix(const struct wim_lookup_table_entry *lte,
637 consume_data_callback_t cb,
641 const tchar *filename = lte->file_on_disk;
646 fd = open(filename, O_RDONLY);
648 ERROR_WITH_ERRNO("Can't open \"%"TS"\"", filename);
649 return WIMLIB_ERR_OPEN;
652 /* Send data to callback function */
653 u8 buf[min(WIM_CHUNK_SIZE, size)];
654 size_t bytes_to_read;
656 bytes_to_read = min(WIM_CHUNK_SIZE, size);
657 bytes_read = full_read(fd, buf, bytes_to_read);
658 if (bytes_read != bytes_to_read)
660 ret = cb(buf, bytes_read, ctx_or_buf);
666 /* Send data directly to a buffer */
667 bytes_read = full_read(fd, ctx_or_buf, size);
668 if (bytes_read != size)
674 ERROR_WITH_ERRNO("Error reading \"%"TS"\"", filename);
675 ret = WIMLIB_ERR_READ;
680 #endif /* !__WIN32__ */
683 read_buffer_prefix(const struct wim_lookup_table_entry *lte,
684 u64 size, consume_data_callback_t cb,
685 void *ctx_or_buf, int _ignored_flags)
687 const void *inbuf = lte->attached_buffer;
692 size_t chunk_size = min(WIM_CHUNK_SIZE, size);
693 ret = cb(inbuf, chunk_size, ctx_or_buf);
700 memcpy(ctx_or_buf, inbuf, size);
705 typedef int (*read_resource_prefix_handler_t)(const struct wim_lookup_table_entry *lte,
707 consume_data_callback_t cb,
712 * Read the first @size bytes from a generic "resource", which may be located in
713 * the WIM (compressed or uncompressed), in an external file, or directly in an
716 * Feed the data either to a callback function (cb != NULL, passing it
717 * ctx_or_buf), or write it directly into a buffer (cb == NULL, ctx_or_buf
718 * specifies the buffer, which must have room for @size bytes).
720 * When using a callback function, it is called with chunks up to 32768 bytes in
721 * size until the resource is exhausted.
723 * If the resource is located in a WIM file, @flags can be:
724 * * WIMLIB_RESOURCE_FLAG_THREADSAFE_READ if it must be safe to access the resource
725 * concurrently by multiple threads.
726 * * WIMLIB_RESOURCE_FLAG_RAW if the raw compressed data is to be supplied
727 * instead of the uncompressed data.
728 * Otherwise, the @flags are ignored.
731 read_resource_prefix(const struct wim_lookup_table_entry *lte,
732 u64 size, consume_data_callback_t cb, void *ctx_or_buf,
735 static const read_resource_prefix_handler_t handlers[] = {
736 [RESOURCE_IN_WIM] = read_wim_resource_prefix,
738 [RESOURCE_IN_FILE_ON_DISK] = read_file_on_disk_prefix,
740 [RESOURCE_IN_ATTACHED_BUFFER] = read_buffer_prefix,
742 [RESOURCE_IN_STAGING_FILE] = read_file_on_disk_prefix,
745 [RESOURCE_IN_NTFS_VOLUME] = read_ntfs_file_prefix,
748 [RESOURCE_WIN32] = read_win32_file_prefix,
749 [RESOURCE_WIN32_ENCRYPTED] = read_win32_encrypted_file_prefix,
752 wimlib_assert(lte->resource_location < ARRAY_LEN(handlers)
753 && handlers[lte->resource_location] != NULL);
754 return handlers[lte->resource_location](lte, size, cb, ctx_or_buf, flags);
758 read_full_resource_into_buf(const struct wim_lookup_table_entry *lte,
759 void *buf, bool thread_safe)
761 return read_resource_prefix(lte,
762 wim_resource_size(lte),
764 thread_safe ? WIMLIB_RESOURCE_FLAG_THREADSAFE_READ : 0);
769 consume_data_callback_t extract_chunk;
770 void *extract_chunk_arg;
774 extract_chunk_sha1_wrapper(const void *chunk, size_t chunk_size,
777 struct extract_ctx *ctx = _ctx;
779 sha1_update(&ctx->sha_ctx, chunk, chunk_size);
780 return ctx->extract_chunk(chunk, chunk_size, ctx->extract_chunk_arg);
783 /* Extracts the first @size bytes of a WIM resource to somewhere. In the
784 * process, the SHA1 message digest of the resource is checked if the full
785 * resource is being extracted.
787 * @extract_chunk is a function that is called to extract each chunk of the
790 extract_wim_resource(const struct wim_lookup_table_entry *lte,
792 consume_data_callback_t extract_chunk,
793 void *extract_chunk_arg)
796 if (size == wim_resource_size(lte)) {
798 struct extract_ctx ctx;
799 ctx.extract_chunk = extract_chunk;
800 ctx.extract_chunk_arg = extract_chunk_arg;
801 sha1_init(&ctx.sha_ctx);
802 ret = read_resource_prefix(lte, size,
803 extract_chunk_sha1_wrapper,
806 u8 hash[SHA1_HASH_SIZE];
807 sha1_final(hash, &ctx.sha_ctx);
808 if (!hashes_equal(hash, lte->hash)) {
809 #ifdef ENABLE_ERROR_MESSAGES
810 ERROR_WITH_ERRNO("Invalid SHA1 message digest "
811 "on the following WIM resource:");
812 print_lookup_table_entry(lte, stderr);
813 if (lte->resource_location == RESOURCE_IN_WIM)
814 ERROR("The WIM file appears to be corrupt!");
815 ret = WIMLIB_ERR_INVALID_RESOURCE_HASH;
821 ret = read_resource_prefix(lte, size, extract_chunk,
822 extract_chunk_arg, 0);
828 extract_wim_chunk_to_fd(const void *buf, size_t len, void *_fd_p)
830 int fd = *(int*)_fd_p;
831 ssize_t ret = full_write(fd, buf, len);
833 ERROR_WITH_ERRNO("Error writing to file descriptor");
834 return WIMLIB_ERR_WRITE;
841 extract_wim_resource_to_fd(const struct wim_lookup_table_entry *lte,
844 return extract_wim_resource(lte, size, extract_wim_chunk_to_fd, &fd);
849 sha1_chunk(const void *buf, size_t len, void *ctx)
851 sha1_update(ctx, buf, len);
855 /* Calculate the SHA1 message digest of a stream. */
857 sha1_resource(struct wim_lookup_table_entry *lte)
863 ret = read_resource_prefix(lte, wim_resource_size(lte),
864 sha1_chunk, &sha_ctx, 0);
866 sha1_final(lte->hash, &sha_ctx);
871 * Copies the file resource specified by the lookup table entry @lte from the
872 * input WIM to the output WIM that has its FILE * given by
873 * ((WIMStruct*)wim)->out_fp.
875 * The output_resource_entry, out_refcnt, and part_number fields of @lte are
878 * (This function is confusing and should be refactored somehow.)
881 copy_resource(struct wim_lookup_table_entry *lte, void *wim)
886 ret = write_wim_resource(lte, w->out_fp,
887 wim_resource_compression_type(lte),
888 <e->output_resource_entry, 0);
890 lte->out_refcnt = lte->refcnt;
891 lte->part_number = w->hdr.part_number;