liblzma/common/index_decoder.c

64 	lzma_index_coder *coder = coder_ptr;
71 	switch (coder->sequence) {
85 		coder->sequence = SEQ_COUNT;
89 		ret = lzma_vli_decode(&coder->count, &coder->pos,
94 		coder->pos = 0;
95 		coder->sequence = SEQ_MEMUSAGE;
100 		if (lzma_index_memusage(1, coder->count) > coder->memlimit) {
107 		lzma_index_prealloc(coder->index, coder->count);
110 		coder->sequence = coder->count == 0
116 		lzma_vli *size = coder->sequence == SEQ_UNPADDED
117 				? &coder->unpadded_size
118 				: &coder->uncompressed_size;
120 		ret = lzma_vli_decode(size, &coder->pos,
126 		coder->pos = 0;
128 		if (coder->sequence == SEQ_UNPADDED) {
131 			if (coder->unpadded_size < UNPADDED_SIZE_MIN
132 					|| coder->unpadded_size
136 			coder->sequence = SEQ_UNCOMPRESSED;
140 					coder->index, allocator,
141 					coder->unpadded_size,
142 					coder->uncompressed_size));
145 			coder->sequence = --coder->count == 0
154 		coder->pos = lzma_index_padding_size(coder->index);
155 		coder->sequence = SEQ_PADDING;
160 		if (coder->pos > 0) {
161 			--coder->pos;
169 		coder->crc32 = lzma_crc32(in + in_start,
170 				*in_pos - in_start, coder->crc32);
172 		coder->sequence = SEQ_CRC32;
181 			if (((coder->crc32 >> (coder->pos * 8)) & 0xFF)
188 		} while (++coder->pos < 4);
192 		*coder->index_ptr = coder->index;
195 		coder->index = NULL;
212 			coder->crc32 = lzma_crc32(in + in_start,
213 					in_used, coder->crc32);
223 	lzma_index_coder *coder = coder_ptr;
224 	lzma_index_end(coder->index, allocator);
225 	lzma_free(coder, allocator);
234 	lzma_index_coder *coder = coder_ptr;
236 	*memusage = lzma_index_memusage(1, coder->count);
237 	*old_memlimit = coder->memlimit;
243 		coder->memlimit = new_memlimit;
251 index_decoder_reset(lzma_index_coder *coder, const lzma_allocator *allocator,
258 	coder->index_ptr = i;
262 	coder->index = lzma_index_init(allocator);
263 	if (coder->index == NULL)
267 	coder->sequence = SEQ_INDICATOR;
268 	coder->memlimit = my_max(1, memlimit);
269 	coder->count = 0; // Needs to be initialized due to _memconfig().
270 	coder->pos = 0;
271 	coder->crc32 = 0;
286 	lzma_index_coder *coder = next->coder;
287 	if (coder == NULL) {
288 		coder = lzma_alloc(sizeof(lzma_index_coder), allocator);
289 		if (coder == NULL)
292 		next->coder = coder;
296 		coder->index = NULL;
298 		lzma_index_end(coder->index, allocator);
301 	return index_decoder_reset(coder, allocator, i, memlimit);
339 	lzma_index_coder coder;
340 	return_if_error(index_decoder_reset(&coder, allocator, i, *memlimit));
347 	lzma_ret ret = index_decode(&coder, allocator, in, in_pos, in_size,
355 		lzma_index_end(coder.index, allocator);
367 			*memlimit = lzma_index_memusage(1, coder.count);