liblzma/common/index_decoder.c

65 	lzma_index_coder *coder = coder_ptr;
72 	switch (coder->sequence) {
86 		coder->sequence = SEQ_COUNT;
90 		ret = lzma_vli_decode(&coder->count, &coder->pos,
95 		coder->pos = 0;
96 		coder->sequence = SEQ_MEMUSAGE;
101 		if (lzma_index_memusage(1, coder->count) > coder->memlimit) {
108 		lzma_index_prealloc(coder->index, coder->count);
111 		coder->sequence = coder->count == 0
117 		lzma_vli *size = coder->sequence == SEQ_UNPADDED
118 				? &coder->unpadded_size
119 				: &coder->uncompressed_size;
121 		ret = lzma_vli_decode(size, &coder->pos,
127 		coder->pos = 0;
129 		if (coder->sequence == SEQ_UNPADDED) {
132 			if (coder->unpadded_size < UNPADDED_SIZE_MIN
133 					|| coder->unpadded_size
137 			coder->sequence = SEQ_UNCOMPRESSED;
141 					coder->index, allocator,
142 					coder->unpadded_size,
143 					coder->uncompressed_size));
146 			coder->sequence = --coder->count == 0
155 		coder->pos = lzma_index_padding_size(coder->index);
156 		coder->sequence = SEQ_PADDING;
161 		if (coder->pos > 0) {
162 			--coder->pos;
170 		coder->crc32 = lzma_crc32(in + in_start,
171 				*in_pos - in_start, coder->crc32);
173 		coder->sequence = SEQ_CRC32;
182 			if (((coder->crc32 >> (coder->pos * 8)) & 0xFF)
186 		} while (++coder->pos < 4);
190 		*coder->index_ptr = coder->index;
193 		coder->index = NULL;
204 	coder->crc32 = lzma_crc32(in + in_start,
205 			*in_pos - in_start, coder->crc32);
214 	lzma_index_coder *coder = coder_ptr;
215 	lzma_index_end(coder->index, allocator);
216 	lzma_free(coder, allocator);
225 	lzma_index_coder *coder = coder_ptr;
227 	*memusage = lzma_index_memusage(1, coder->count);
228 	*old_memlimit = coder->memlimit;
234 		coder->memlimit = new_memlimit;
242 index_decoder_reset(lzma_index_coder *coder, const lzma_allocator *allocator,
249 	coder->index_ptr = i;
253 	coder->index = lzma_index_init(allocator);
254 	if (coder->index == NULL)
258 	coder->sequence = SEQ_INDICATOR;
259 	coder->memlimit = memlimit;
260 	coder->count = 0; // Needs to be initialized due to _memconfig().
261 	coder->pos = 0;
262 	coder->crc32 = 0;
277 	lzma_index_coder *coder = next->coder;
278 	if (coder == NULL) {
279 		coder = lzma_alloc(sizeof(lzma_index_coder), allocator);
280 		if (coder == NULL)
283 		next->coder = coder;
287 		coder->index = NULL;
289 		lzma_index_end(coder->index, allocator);
292 	return index_decoder_reset(coder, allocator, i, memlimit);
319 	lzma_index_coder coder;
320 	return_if_error(index_decoder_reset(&coder, allocator, i, *memlimit));
327 	lzma_ret ret = index_decode(&coder, allocator, in, in_pos, in_size,
335 		lzma_index_end(coder.index, allocator);
347 			*memlimit = lzma_index_memusage(1, coder.count);