liblzma/common/lzip_decoder.c

100 	lzma_lzip_coder *coder = coder_ptr;
103 	switch (coder->sequence) {
108 		while (coder->pos < sizeof(lzip_id_string)) {
115 				return !coder->first_member
120 			if (in[*in_pos] != lzip_id_string[coder->pos]) {
138 				return !coder->first_member
143 			++coder->pos;
146 		coder->pos = 0;
148 		coder->crc32 = 0;
149 		coder->uncompressed_size = 0;
150 		coder->member_size = sizeof(lzip_id_string);
152 		coder->sequence = SEQ_VERSION;
161 		coder->version = in[(*in_pos)++];
164 		if (coder->version > 1)
167 		++coder->member_size;
168 		coder->sequence = SEQ_DICT_SIZE;
173 		if (coder->tell_any_check)
183 		++coder->member_size;
204 		coder->options.dict_size = (UINT32_C(1) << b2log)
207 		assert(coder->options.dict_size >= 4096);
208 		assert(coder->options.dict_size <= (UINT32_C(512) << 20));
210 		coder->options.preset_dict = NULL;
211 		coder->options.lc = LZIP_LC;
212 		coder->options.lp = LZIP_LP;
213 		coder->options.pb = LZIP_PB;
216 		coder->memusage = lzma_lzma_decoder_memusage(&coder->options)
222 		coder->sequence = SEQ_CODER_INIT;
228 		if (coder->memusage > coder->memlimit)
235 				.options = &coder->options,
241 		return_if_error(lzma_next_filter_init(&coder->lzma_decoder,
244 		coder->crc32 = 0;
245 		coder->sequence = SEQ_LZMA_STREAM;
254 		const lzma_ret ret = coder->lzma_decoder.code(
255 				coder->lzma_decoder.coder, allocator,
261 		coder->member_size += *in_pos - in_start;
262 		coder->uncompressed_size += out_used;
268 		if (!coder->ignore_check && out_used > 0)
269 			coder->crc32 = lzma_crc32(out + out_start, out_used,
270 					coder->crc32);
275 		coder->sequence = SEQ_MEMBER_FOOTER;
284 		const size_t footer_size = coder->version == 0
290 		lzma_bufcpy(in, in_pos, in_size, coder->buffer, &coder->pos,
294 		if (coder->pos < footer_size)
297 		coder->pos = 0;
298 		coder->member_size += footer_size;
301 		if (!coder->ignore_check
302 				&& coder->crc32 != read32le(&coder->buffer[0]))
305 		if (coder->uncompressed_size != read64le(&coder->buffer[4]))
308 		if (coder->version > 0) {
310 			if (coder->member_size != read64le(&coder->buffer[12]))
316 		if (!coder->concatenated)
319 		coder->first_member = false;
320 		coder->sequence = SEQ_ID_STRING;
336 	lzma_lzip_coder *coder = coder_ptr;
337 	lzma_next_end(&coder->lzma_decoder, allocator);
338 	lzma_free(coder, allocator);
354 	lzma_lzip_coder *coder = coder_ptr;
356 	*memusage = coder->memusage;
357 	*old_memlimit = coder->memlimit;
360 		if (new_memlimit < coder->memusage)
363 		coder->memlimit = new_memlimit;
380 	lzma_lzip_coder *coder = next->coder;
381 	if (coder == NULL) {
382 		coder = lzma_alloc(sizeof(lzma_lzip_coder), allocator);
383 		if (coder == NULL)
386 		next->coder = coder;
392 		coder->lzma_decoder = LZMA_NEXT_CODER_INIT;
395 	coder->sequence = SEQ_ID_STRING;
396 	coder->memlimit = my_max(1, memlimit);
397 	coder->memusage = LZMA_MEMUSAGE_BASE;
398 	coder->tell_any_check = (flags & LZMA_TELL_ANY_CHECK) != 0;
399 	coder->ignore_check = (flags & LZMA_IGNORE_CHECK) != 0;
400 	coder->concatenated = (flags & LZMA_CONCATENATED) != 0;
401 	coder->first_member = true;
402 	coder->pos = 0;