1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
// 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/FileUtil.h"
#include "DiscIO/Blob.h"
namespace DiscIO
{
bool IsCISOBlob(const std::string& filename);
static const u32 CISO_HEADER_SIZE = 0x8000;
static const u32 CISO_MAP_SIZE = CISO_HEADER_SIZE - sizeof(u32) - sizeof(char) * 4;
struct CISOHeader
{
// "CISO"
char magic[4];
// little endian
u32 block_size;
// 0=unused, 1=used, others=invalid
u8 map[CISO_MAP_SIZE];
};
class CISOFileReader : public IBlobReader
{
public:
static std::unique_ptr<CISOFileReader> Create(const std::string& filename);
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;
u64 GetRawSize() const override;
bool Read(u64 offset, u64 nbytes, u8* out_ptr) override;
private:
CISOFileReader(std::FILE* file);
typedef u16 MapType;
static const MapType UNUSED_BLOCK_ID = -1;
File::IOFile m_file;
u64 m_size;
u32 m_block_size;
MapType m_ciso_map[CISO_MAP_SIZE];
};
} // namespace
|
