liblzma/lz/lz_encoder.c

33 	/// Next coder in the chain
81 fill_window(lzma_coder *coder, const lzma_allocator *allocator,
85 	assert(coder->mf.read_pos <= coder->mf.write_pos);
88 	if (coder->mf.read_pos >= coder->mf.size - coder->mf.keep_size_after)
89 		move_window(&coder->mf);
94 	size_t write_pos = coder->mf.write_pos;
96 	if (coder->next.code == NULL) {
98 		lzma_bufcpy(in, in_pos, in_size, coder->mf.buffer,
99 				&write_pos, coder->mf.size);
105 		ret = coder->next.code(coder->next.coder, allocator,
107 				coder->mf.buffer, &write_pos,
108 				coder->mf.size, action);
111 	coder->mf.write_pos = write_pos;
117 	memzero(coder->mf.buffer + write_pos, LZMA_MEMCMPLEN_EXTRA);
126 		coder->mf.action = action;
127 		coder->mf.read_limit = coder->mf.write_pos;
129 	} else if (coder->mf.write_pos > coder->mf.keep_size_after) {
133 		coder->mf.read_limit = coder->mf.write_pos
134 				- coder->mf.keep_size_after;
138 	if (coder->mf.pending > 0
139 			&& coder->mf.read_pos < coder->mf.read_limit) {
140 		// Match finder may update coder->pending and expects it to
142 		const uint32_t pending = coder->mf.pending;
143 		coder->mf.pending = 0;
147 		assert(coder->mf.read_pos >= pending);
148 		coder->mf.read_pos -= pending;
152 		coder->mf.skip(&coder->mf, pending);
166 	lzma_coder *coder = coder_ptr;
170 		// Read more data to coder->mf.buffer if needed.
171 		if (coder->mf.action == LZMA_RUN && coder->mf.read_pos
172 				>= coder->mf.read_limit)
173 			return_if_error(fill_window(coder, allocator,
177 		const lzma_ret ret = coder->lz.code(coder->lz.coder,
178 				&coder->mf, out, out_pos, out_size);
183 			coder->mf.action = LZMA_RUN;
488 	lzma_coder *coder = coder_ptr;
490 	lzma_next_end(&coder->next, allocator);
492 	lzma_free(coder->mf.son, allocator);
493 	lzma_free(coder->mf.hash, allocator);
494 	lzma_free(coder->mf.buffer, allocator);
496 	if (coder->lz.end != NULL)
497 		coder->lz.end(coder->lz.coder, allocator);
499 		lzma_free(coder->lz.coder, allocator);
501 	lzma_free(coder, allocator);
511 	lzma_coder *coder = coder_ptr;
513 	if (coder->lz.options_update == NULL)
516 	return_if_error(coder->lz.options_update(
517 			coder->lz.coder, reversed_filters));
520 			&coder->next, allocator, reversed_filters + 1);
537 	lzma_coder *coder = next->coder;
538 	if (coder == NULL) {
539 		coder = lzma_alloc(sizeof(lzma_coder), allocator);
540 		if (coder == NULL)
543 		next->coder = coder;
548 		coder->lz.coder = NULL;
549 		coder->lz.code = NULL;
550 		coder->lz.end = NULL;
555 		coder->mf.buffer = NULL;
556 		coder->mf.size = 0;
557 		coder->mf.hash = NULL;
558 		coder->mf.son = NULL;
559 		coder->mf.hash_count = 0;
560 		coder->mf.sons_count = 0;
562 		coder->next = LZMA_NEXT_CODER_INIT;
567 	return_if_error(lz_init(&coder->lz, allocator,
570 	// Setup the size information into coder->mf and deallocate
572 	if (lz_encoder_prepare(&coder->mf, allocator, &lz_options))
577 	if (lz_encoder_init(&coder->mf, allocator, &lz_options))
581 	return lzma_next_filter_init(&coder->next, allocator, filters + 1);