日式横版射击游戏《天蓝色ElexiaJ》的资源解包

1 struct PACK_FILE_HEADER {
2     char sig[ 4 ]; // KCAP
3     short file_number; // 文件数量
4     char u1[ 2 ];
5 };

1 struct PACK_FILE_INFO {
2     char file_name[ 64 ]; // 文件完整路径名
3     BYTE u1[ 8 ];
4     int file_data_pos_in_file; // 文件数据在 pack 中的开始位置
5     int file_size; // 文件数据大小
6     BYTE u2[ 4 ];
7 };

 1 #include <stdio.h>
 2 #include <string.h>
 3 #include <Windows.h>
 4 
 5 struct PACK_FILE_HEADER {
 6     char sig[ 4 ]; // KCAP
 7     short file_number; // 文件数量
 8     char u1[ 2 ];
 9 };
10 
11 struct PACK_FILE_INFO {
12     char file_name[ 64 ]; // 文件完整路径名
13     BYTE u1[ 8 ];
14     int file_data_pos_in_file; // 文件数据在 pack 中的开始位置
15     int file_size; // 文件数据大小
16     BYTE u2[ 4 ];
17 };
18 
19 void buildDirectoryPath( const char * _path ){
20     unsigned int len = ::strlen( _path );
21     char * build_path = new char[ len + 1 ];
22     for( unsigned int i = 0; i < len; ++ i ){
23         build_path[ i ] = _path[ i ];
24         if( ‘\\‘ == build_path[ i ] ){
25             build_path[ i + 1 ] = ‘\0‘;
26             CreateDirectoryA( build_path, nullptr );
27         }
28     }
29 }
30 
31 const char * getFileTitle( const char * _file_name ){
32     static char title[ 256 ] = { 0 };
33     memset( title, 0, sizeof( title ) );
34     for( unsigned int i = 0; i < strlen( _file_name ); ++ i ){
35         if( ‘.‘ == _file_name[ i ] )
36             break;
37         title[ i ] = _file_name[ i ];
38     }
39     return ( const char * ) title;
40 }
41 
42 void extraFile( FILE * _pack_file, const char * _pack_name, PACK_FILE_INFO * _file_info ){
43     FILE * file = nullptr;
44     BYTE * file_data = new BYTE[ _file_info->file_size ];
45     char full_path[ 256 ] = { 0 };
46 
47     sprintf_s( full_path, 256,
48         "%s\\%s",
49         getFileTitle( _pack_name ),
50         _file_info->file_name );
51     buildDirectoryPath( full_path );
52 
53     printf( "%s \n", full_path );
54     fopen_s( & file, full_path, "wb" );
55     fseek( _pack_file, _file_info->file_data_pos_in_file, SEEK_SET );
56     fread( file_data, 1, _file_info->file_size, _pack_file );
57     fwrite( file_data, 1, _file_info->file_size, file );
58     delete [ ] file_data;
59     fclose( file );
60 }
61 
62 void extraPack( const char * _pack_name ){
63     FILE * pack_file = nullptr;
64     PACK_FILE_HEADER header;
65     PACK_FILE_INFO * file_list = nullptr;
66 
67     fopen_s( & pack_file, _pack_name, "rb" );
68 
69     // 读取文件头信息
70     fread( ( void * ) & header, 1, sizeof( PACK_FILE_HEADER ), pack_file );
71 
72     // 读取文件信息
73     file_list = new PACK_FILE_INFO[ header.file_number ];
74     fread( ( void * ) file_list, 1, sizeof( PACK_FILE_INFO ) * header.file_number, pack_file );
75 
76     // 解开文件
77     for( short i = 0; i < header.file_number; ++ i ){
78         extraFile( pack_file, _pack_name, & file_list[ i ] );
79     }
80 
81     delete [ ] file_list;
82     fclose( pack_file );
83 }
84 
85 int main( int argc, char * argv[ ] ){
86     extraPack( "data2.Pack" );
87     extraPack( "data.Pack" );
88     return 0;
89 }