diff options
Diffstat (limited to 'zip.c')
| -rw-r--r-- | zip.c | 159 |
1 files changed, 0 insertions, 159 deletions
@@ -1,159 +0,0 @@ -/* gameplaySP - * - * Copyright (C) 2006 Exophase <exophase@gmail.com> - * Copyright (C) 2006 SiberianSTAR - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "common.h" -#include <zlib.h> - -#define ZIP_BUFFER_SIZE (128 * 1024) - -struct SZIPFileDataDescriptor -{ - s32 CRC32; - s32 CompressedSize; - s32 UncompressedSize; -} __attribute__((packed)); - -struct SZIPFileHeader -{ - char Sig[4]; // EDIT: Used to be s32 Sig; - s16 VersionToExtract; - s16 GeneralBitFlag; - s16 CompressionMethod; - s16 LastModFileTime; - s16 LastModFileDate; - struct SZIPFileDataDescriptor DataDescriptor; - s16 FilenameLength; - s16 ExtraFieldLength; -} __attribute__((packed)); - -u32 load_file_zip(const char *filename) -{ - struct SZIPFileHeader data; - char tmp[1024]; - s32 retval = -1; - u8 *buffer = NULL; - u8 *cbuffer; - char *ext; - int ret; - - file_open(fd, filename, read); - - if(!file_check_valid(fd)) - return -1; - - while (1) - { - ret = file_read(fd, &data, sizeof(data)); - if (ret != sizeof(data)) - break; - - // It checks for the following: 0x50 0x4B 0x03 0x04 (PK..) - if( data.Sig[0] != 0x50 || data.Sig[1] != 0x4B || - data.Sig[2] != 0x03 || data.Sig[3] != 0x04 ) - { - break; - } - - ret = file_read(fd, tmp, data.FilenameLength); - if (ret != data.FilenameLength) - break; - - tmp[data.FilenameLength] = 0; // end string - - if(data.ExtraFieldLength) - file_seek(fd, data.ExtraFieldLength, SEEK_CUR); - - if(data.GeneralBitFlag & 0x0008) - { - file_read(fd, &data.DataDescriptor, - sizeof(struct SZIPFileDataDescriptor)); - } - - ext = strrchr(tmp, '.') + 1; - - // file is too big - if(data.DataDescriptor.UncompressedSize > gamepak_ram_buffer_size) - goto skip; - - if(!strcasecmp(ext, "bin") || !strcasecmp(ext, "gba")) - { - buffer = gamepak_rom; - - // ok, found - switch(data.CompressionMethod) - { - case 0: - retval = data.DataDescriptor.UncompressedSize; - file_read(fd, buffer, retval); - goto outcode; - - case 8: - { - z_stream stream; - s32 err; - - cbuffer = malloc(ZIP_BUFFER_SIZE); - - stream.next_in = (Bytef*)cbuffer; - stream.avail_in = (u32)ZIP_BUFFER_SIZE; - - stream.next_out = (Bytef*)buffer; - - // EDIT: Now uses proper conversion of data types for retval. - retval = (u32)data.DataDescriptor.UncompressedSize; - stream.avail_out = data.DataDescriptor.UncompressedSize; - - stream.zalloc = (alloc_func)0; - stream.zfree = (free_func)0; - - err = inflateInit2(&stream, -MAX_WBITS); - - file_read(fd, cbuffer, ZIP_BUFFER_SIZE); - - if(err == Z_OK) - { - while(err != Z_STREAM_END) - { - err = inflate(&stream, Z_SYNC_FLUSH); - if(err == Z_BUF_ERROR) - { - stream.avail_in = ZIP_BUFFER_SIZE; - stream.next_in = (Bytef*)cbuffer; - file_read(fd, cbuffer, ZIP_BUFFER_SIZE); - } - } - err = Z_OK; - inflateEnd(&stream); - } - free(cbuffer); - goto outcode; - } - } - } - -skip: - file_seek(fd, data.DataDescriptor.CompressedSize, SEEK_CUR); - } - -outcode: - file_close(fd); - - return retval; -} |