61 lines
1.3 KiB
C++
61 lines
1.3 KiB
C++
// Copyright 2008 Dolphin Emulator Project
|
|
// Licensed under GPLv2+
|
|
// Refer to the license.txt file included.
|
|
|
|
#pragma once
|
|
|
|
#include <cstdio>
|
|
#include <memory>
|
|
#include <string>
|
|
|
|
#include "Common/CommonTypes.h"
|
|
#include "Common/File.h"
|
|
#include "DiscIO/Blob.h"
|
|
|
|
namespace DiscIO
|
|
{
|
|
static constexpr u32 CISO_MAGIC = 0x4F534943; // "CISO" (byteswapped to little endian)
|
|
|
|
static const u32 CISO_HEADER_SIZE = 0x8000;
|
|
static const u32 CISO_MAP_SIZE = CISO_HEADER_SIZE - sizeof(u32) - sizeof(char) * 4;
|
|
|
|
struct CISOHeader
|
|
{
|
|
// "CISO"
|
|
u32 magic;
|
|
|
|
// little endian
|
|
u32 block_size;
|
|
|
|
// 0=unused, 1=used, others=invalid
|
|
u8 map[CISO_MAP_SIZE];
|
|
};
|
|
|
|
class CISOFileReader : public BlobReader
|
|
{
|
|
public:
|
|
static std::unique_ptr<CISOFileReader> Create(File::IOFile file);
|
|
|
|
BlobType GetBlobType() const override { return BlobType::CISO; }
|
|
// The CISO format does not save the original file size.
|
|
// This function returns an upper bound.
|
|
u64 GetDataSize() const override;
|
|
bool IsDataSizeAccurate() const override { return false; }
|
|
|
|
u64 GetRawSize() const override;
|
|
bool Read(u64 offset, u64 nbytes, u8* out_ptr) override;
|
|
|
|
private:
|
|
CISOFileReader(File::IOFile file);
|
|
|
|
typedef u16 MapType;
|
|
static const MapType UNUSED_BLOCK_ID = UINT16_MAX;
|
|
|
|
File::IOFile m_file;
|
|
u64 m_size;
|
|
u32 m_block_size;
|
|
MapType m_ciso_map[CISO_MAP_SIZE];
|
|
};
|
|
|
|
} // namespace DiscIO
|