mirror of
https://github.com/wiidev/usbloadergx.git
synced 2024-07-01 15:36:08 +02:00
129 lines
3.7 KiB
C++
129 lines
3.7 KiB
C++
/****************************************************************************
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* Copyright (C) 2012 Dimok and giantpune
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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****************************************************************************/
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#ifndef U8ARCHIVE_H
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#define U8ARCHIVE_H
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#include <string>
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#include <gccore.h>
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#include "tools.h"
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class U8Archive
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{
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public:
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U8Archive( const u8 *stuff, u32 len );
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// set the data used for this archive
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virtual void SetData( const u8 *stuff, u32 len );
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// returns a pointer to a file within the archive
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virtual u8* GetFile( const char *path, u32 *size = NULL ) const;
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virtual u8* GetFile( const std::string &path, u32 *size = NULL ) const;
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virtual u8* GetFile( u32 fstIdx, u32 *size = NULL ) const;
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// gets a file and copies it into a newly memalign()'d buffer
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//! if the data looks ASH or LZ77 compressed, it is decompressed
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virtual u8* GetFileAllocated( const char *path, u32 *size = NULL ) const;
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virtual u8* GetFileAllocated( const std::string &path, u32 *size = NULL ) const;
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virtual u8* GetFileAllocated( u32 fstIdx, u32 *size = NULL ) const;
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virtual u32 FileDescriptor( const char *path ) const;
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virtual u32 FileDescriptor( const std::string &path ) const{ return FileDescriptor( path.c_str() ); }
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virtual u8* GetFileFromFd( u32 fd, u32 *size = NULL )const;
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protected:
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struct U8Header
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{
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u32 magic;
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u32 rootNodeOffset;
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u32 headerSize;
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u32 dataOffset;
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u8 zeroes[16];
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} __attribute__((packed));
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struct FstEntry
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{
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u8 filetype;
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char name_offset[3];
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u32 fileoffset;
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u32 filelen;
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} __attribute__((packed));
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FstEntry *fst;
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char *name_table;
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u8* data;
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u32 NextEntryInFolder( u32 current, u32 directory ) const ;
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s32 EntryFromPath( const char *path, int d = 0 ) const ;
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char *FstName( const FstEntry *entry ) const;
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u8 *DecompressCopy( const u8 * stuff, u32 len, u32 *size ) const;
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static int strlen_slash( const char *s );
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static int strcasecmp_slash( const char *s1, const char *s2 );
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// lightweight toupper - because U8 archives are case-insinsitive
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static char toupper( char c )
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{
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if( c <= 'z' && c >= 'a' )
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return c - 0x20;
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return c;
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}
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// looks in some common offsets for a U8 tag
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static const u8* FindU8Tag( const u8* stuff, u32 len );
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};
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// class to access files from an archive that is saved on the NAND
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// GetFile() will return NULL, use GetfileAllocated()
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class U8NandArchive : public U8Archive
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{
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public:
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U8NandArchive( const char* nandPath );
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~U8NandArchive();
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bool SetFile( const char* nandPath );
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// not implimented in this subclass...
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void SetData( const u8 *stuff, u32 len ){}
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u8* GetFile( const char *path, u32 *size = NULL ) const { return NULL; }
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u8* GetFile( const std::string &path, u32 *size = NULL ) const { return NULL; }
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u8* GetFileFromFd( u32 fd, u32 *size = NULL )const { return NULL; }
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// gets a file and copies it into a newly memalign()'d buffer
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//! if the data looks ASH or LZ77 compressed, it is decompressed
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u8* GetFileAllocated( const char *path, u32 *size = NULL ) const;
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private:
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s32 fd;
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// where the U8 header starts within the file
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u32 dataOffset;
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void CloseFile()
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{
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if( fd >= 0 )
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{
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ISFS_Close( fd );
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fd = -1;
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}
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}
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};
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#endif // U8ARCHIVE_H
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