4 * Generic functions for decompression, wrapping around actual decompression
9 * Copyright (C) 2013 Eric Biggers
11 * This file is part of wimlib, a library for working with WIM files.
13 * wimlib is free software; you can redistribute it and/or modify it under the
14 * terms of the GNU General Public License as published by the Free
15 * Software Foundation; either version 3 of the License, or (at your option)
18 * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
19 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
20 * A PARTICULAR PURPOSE. See the GNU General Public License for more
23 * You should have received a copy of the GNU General Public License
24 * along with wimlib; if not, see http://www.gnu.org/licenses/.
32 #include "wimlib/decompressor_ops.h"
33 #include "wimlib/util.h"
35 struct wimlib_decompressor {
36 const struct decompressor_ops *ops;
40 static const struct decompressor_ops *decompressor_ops[] = {
41 [WIMLIB_COMPRESSION_TYPE_XPRESS] = &xpress_decompressor_ops,
42 [WIMLIB_COMPRESSION_TYPE_LZX] = &lzx_decompressor_ops,
43 [WIMLIB_COMPRESSION_TYPE_LZMS] = &lzms_decompressor_ops,
46 static struct wimlib_decompressor_params_header *
47 decompressor_default_params[ARRAY_LEN(decompressor_ops)] = {
51 decompressor_ctype_valid(int ctype)
54 ctype < ARRAY_LEN(decompressor_ops) &&
55 decompressor_ops[ctype] != NULL);
59 wimlib_set_default_decompressor_params(enum wimlib_compression_type ctype,
60 const struct wimlib_decompressor_params_header *params)
62 struct wimlib_decompressor_params_header *dup;
64 if (!decompressor_ctype_valid(ctype))
65 return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
69 dup = memdup(params, params->size);
71 return WIMLIB_ERR_NOMEM;
74 FREE(decompressor_default_params[ctype]);
75 decompressor_default_params[ctype] = dup;
80 cleanup_decompressor_params(void)
82 for (size_t i = 0; i < ARRAY_LEN(decompressor_default_params); i++) {
83 FREE(decompressor_default_params[i]);
84 decompressor_default_params[i] = NULL;
89 wimlib_create_decompressor(enum wimlib_compression_type ctype,
90 size_t max_block_size,
91 const struct wimlib_decompressor_params_header *extra_params,
92 struct wimlib_decompressor **dec_ret)
94 struct wimlib_decompressor *dec;
97 return WIMLIB_ERR_INVALID_PARAM;
99 if (!decompressor_ctype_valid(ctype))
100 return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
102 dec = MALLOC(sizeof(*dec));
104 return WIMLIB_ERR_NOMEM;
105 dec->ops = decompressor_ops[ctype];
107 if (dec->ops->create_decompressor) {
108 const struct wimlib_decompressor_params_header *params;
112 params = extra_params;
114 params = decompressor_default_params[ctype];
115 ret = dec->ops->create_decompressor(max_block_size,
128 wimlib_decompress(const void *compressed_data, size_t compressed_size,
129 void *uncompressed_data, size_t uncompressed_size,
130 struct wimlib_decompressor *dec)
132 return dec->ops->decompress(compressed_data, compressed_size,
133 uncompressed_data, uncompressed_size,
138 wimlib_free_decompressor(struct wimlib_decompressor *dec)
141 if (dec->ops->free_decompressor)
142 dec->ops->free_decompressor(dec->private);