RetroArch/libretro-common/include/file/file_extract.h

/* Copyright  (C) 2010-2015 The RetroArch team
 *
 * ---------------------------------------------------------------------------------------
 * The following license statement only applies to this file (file_extract.h).
 * ---------------------------------------------------------------------------------------
 *
 * Permission is hereby granted, free of charge,
 * to any person obtaining a copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef FILE_EXTRACT_H__
#define FILE_EXTRACT_H__

#include <boolean.h>
#include <stddef.h>
#include <stdint.h>

typedef struct zlib_handle
{
   void     *stream;
   uint8_t *data;
   uint32_t real_checksum;
} zlib_file_handle_t;

/* Returns true when parsing should continue. False to stop. */
typedef int (*zlib_file_cb)(const char *name, const char *valid_exts,
      const uint8_t *cdata, unsigned cmode, uint32_t csize, uint32_t size,
      uint32_t crc32, void *userdata);

uint32_t zlib_crc32_calculate(const uint8_t *data, size_t length);

uint32_t zlib_crc32_adjust(uint32_t crc, uint8_t data);

/**
 * zlib_parse_file:
 * @file                        : filename path of archive
 * @valid_exts                  : Valid extensions of archive to be parsed. 
 *                                If NULL, allow all.
 * @file_cb                     : file_cb function pointer
 * @userdata                    : userdata to pass to file_cb function pointer.
 *
 * Low-level file parsing. Enumerates over all files and calls 
 * file_cb with userdata.
 *
 * Returns: true (1) on success, otherwise false (0).
 **/
bool zlib_parse_file(const char *file, const char *valid_exts,
      zlib_file_cb file_cb, void *userdata);

/**
 * zlib_extract_first_content_file:
 * @zip_path                    : filename path to ZIP archive.
 * @zip_path_size               : size of ZIP archive.
 * @valid_exts                  : valid extensions for a content file.
 * @extraction_directory        : the directory to extract temporary
 *                                unzipped content to.
 *
 * Extract first content file from archive.
 *
 * Returns : true (1) on success, otherwise false (0).
 **/
bool zlib_extract_first_content_file(char *zip_path, size_t zip_path_size, 
      const char *valid_exts, const char *extraction_dir);

/**
 * zlib_get_file_list:
 * @path                        : filename path of archive
 * @valid_exts                  : Valid extensions of archive to be parsed. 
 *                                If NULL, allow all.
 *
 * Returns: string listing of files from archive on success, otherwise NULL.
 **/
struct string_list *zlib_get_file_list(const char *path, const char *valid_exts);

bool zlib_inflate_data_to_file_init(
      zlib_file_handle_t *handle,
      const uint8_t *cdata,  uint32_t csize, uint32_t size);

int zlib_inflate_data_to_file_iterate(void *data);

/**
 * zlib_inflate_data_to_file:
 * @path                        : filename path of archive.
 * @cdata                       : input data.
 * @csize                       : size of input data.
 * @size                        : output file size
 * @checksum                    : CRC32 checksum from input data.
 *
 * Decompress data to file.
 *
 * Returns: true (1) on success, otherwise false (0).
 **/
int zlib_inflate_data_to_file(zlib_file_handle_t *handle,
      int ret, const char *path, const char *valid_exts,
      const uint8_t *cdata, uint32_t csize, uint32_t size, uint32_t checksum);

bool zlib_perform_mode(const char *name, const char *valid_exts,
      const uint8_t *cdata, unsigned cmode, uint32_t csize, uint32_t size,
      uint32_t crc32, void *userdata);

struct string_list *compressed_file_list_new(const char *filename,
      const char* ext);

void *zlib_stream_new(void);

void zlib_stream_free(void *data);

#endif