dolphin/Source/Core/DiscIO/Src/CISOBlob.h

66 lines
1.7 KiB
C++

// Copyright (C) 2003 Dolphin Project.
// 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, version 2.0.
// 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 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#ifndef _CISO_BLOB_H
#define _CISO_BLOB_H
#include "Blob.h"
#include "FileUtil.h"
#define CISO_MAGIC "CISO"
#define CISO_HEAD_SIZE (0x8000)
#define CISO_MAP_SIZE (CISO_HEAD_SIZE - 8)
namespace DiscIO
{
bool IsCISOBlob(const char* filename);
// Blocks that won't compress to less than 97% of the original size are stored as-is.
struct CISO_Head_t
{
u8 magic[4]; // "CISO"
u32 block_size; // stored as litte endian (not network byte order)
u8 map[CISO_MAP_SIZE]; // 0=unused, 1=used, others=invalid
};
typedef u16 CISO_Map_t;
const CISO_Map_t CISO_UNUSED_BLOCK = (CISO_Map_t)~0;
class CISOFileReader : public IBlobReader
{
File::IOFile m_file;
CISOFileReader(std::FILE* file);
s64 m_size;
public:
static CISOFileReader* Create(const char* filename);
u64 GetDataSize() const { return m_size; }
u64 GetRawSize() const { return m_size; }
bool Read(u64 offset, u64 nbytes, u8* out_ptr);
private:
CISO_Head_t header;
CISO_Map_t ciso_map[CISO_MAP_SIZE];
};
} // namespace
#endif // _FILE_BLOB_H