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// Archive/IsoIn.h
#ifndef __ARCHIVE_ISO_IN_H
#define __ARCHIVE_ISO_IN_H
#include "Common/MyCom.h"
#include "Common/IntToString.h"
#include "../../IStream.h"
#include "IsoItem.h"
#include "IsoHeader.h"
namespace NArchive {
namespace NIso {
struct CDir: public CDirRecord
{
CDir *Parent;
CObjectVector<CDir> _subItems;
void Clear()
{
Parent = 0;
_subItems.Clear();
}
int GetLength(bool checkSusp, int skipSize) const
{
int len = GetLengthCur(checkSusp, skipSize);
if (Parent != 0)
if (Parent->Parent != 0)
len += 1 + Parent->GetLength(checkSusp, skipSize);
return len;
}
int GetLengthU() const
{
int len = (int)(FileId.GetCapacity() / 2);
if (Parent != 0)
if (Parent->Parent != 0)
len += 1 + Parent->GetLengthU();
return len;
}
AString GetPath(bool checkSusp, int skipSize) const
{
AString s;
int len = GetLength(checkSusp, skipSize);
char *p = s.GetBuffer(len + 1);
p += len;
*p = 0;
const CDir *cur = this;
for (;;)
{
int curLen = cur->GetLengthCur(checkSusp, skipSize);
p -= curLen;
memmove(p, (const char *)(const Byte *)cur->GetNameCur(checkSusp, skipSize), curLen);
cur = cur->Parent;
if (cur == 0)
break;
if (cur->Parent == 0)
break;
p--;
*p = CHAR_PATH_SEPARATOR;
}
s.ReleaseBuffer();
return s;
}
UString GetPathU() const
{
UString s;
int len = GetLengthU();
wchar_t *p = s.GetBuffer(len + 1);
p += len;
*p = 0;
const CDir *cur = this;
for (;;)
{
int curLen = (int)(cur->FileId.GetCapacity() / 2);
p -= curLen;
for (int i = 0; i < curLen; i++)
{
Byte b0 = ((const Byte *)cur->FileId)[i * 2];
Byte b1 = ((const Byte *)cur->FileId)[i * 2 + 1];
p[i] = (wchar_t)(((wchar_t)b0 << 8) | b1);
}
cur = cur->Parent;
if (cur == 0)
break;
if (cur->Parent == 0)
break;
p--;
*p = WCHAR_PATH_SEPARATOR;
}
s.ReleaseBuffer();
return s;
}
};
struct CDateTime
{
UInt16 Year;
Byte Month;
Byte Day;
Byte Hour;
Byte Minute;
Byte Second;
Byte Hundredths;
signed char GmtOffset; // min intervals from -48 (West) to +52 (East) recorded.
bool NotSpecified() const { return Year == 0 && Month == 0 && Day == 0 &&
Hour == 0 && Minute == 0 && Second == 0 && GmtOffset == 0; }
};
struct CBootRecordDescriptor
{
Byte BootSystemId[32]; // a-characters
Byte BootId[32]; // a-characters
Byte BootSystemUse[1977];
};
struct CBootValidationEntry
{
Byte PlatformId;
Byte Id[24]; // to identify the manufacturer/developer of the CD-ROM.
};
struct CBootInitialEntry
{
bool Bootable;
Byte BootMediaType;
UInt16 LoadSegment;
/* This is the load segment for the initial boot image. If this
value is 0 the system will use the traditional segment of 7C0. If this value
is non-zero the system will use the specified segment. This applies to x86
architectures only. For "flat" model architectures (such as Motorola) this
is the address divided by 10. */
Byte SystemType; // This must be a copy of byte 5 (System Type) from the
// Partition Table found in the boot image.
UInt16 SectorCount; // This is the number of virtual/emulated sectors the system
// will store at Load Segment during the initial boot procedure.
UInt32 LoadRBA; // This is the start address of the virtual disk. CD’s use
// Relative/Logical block addressing.
UInt64 GetSize() const
{
// if (BootMediaType == NBootMediaType::k1d44Floppy) (1440 << 10);
return SectorCount * 512;
}
UString GetName() const
{
UString s;
if (Bootable)
s += L"Bootable";
else
s += L"NotBootable";
s += L"_";
if (BootMediaType >= kNumBootMediaTypes)
{
wchar_t name[32];
ConvertUInt64ToString(BootMediaType, name);
s += name;
}
else
s += kMediaTypes[BootMediaType];
s += L".img";
return s;
}
};
struct CVolumeDescriptor
{
Byte VolFlags;
Byte SystemId[32]; // a-characters. An identification of a system
// which can recognize and act upon the content of the Logical
// Sectors with logical Sector Numbers 0 to 15 of the volume.
Byte VolumeId[32]; // d-characters. An identification of the volume.
UInt32 VolumeSpaceSize; // the number of Logical Blocks in which the Volume Space of the volume is recorded
Byte EscapeSequence[32];
UInt16 VolumeSetSize;
UInt16 VolumeSequenceNumber; // the ordinal number of the volume in the Volume Set of which the volume is a member.
UInt16 LogicalBlockSize;
UInt32 PathTableSize;
UInt32 LPathTableLocation;
UInt32 LOptionalPathTableLocation;
UInt32 MPathTableLocation;
UInt32 MOptionalPathTableLocation;
CDirRecord RootDirRecord;
Byte VolumeSetId[128];
Byte PublisherId[128];
Byte DataPreparerId[128];
Byte ApplicationId[128];
Byte CopyrightFileId[37];
Byte AbstractFileId[37];
Byte BibFileId[37];
CDateTime CreationTime;
CDateTime ModificationTime;
CDateTime ExpirationTime;
CDateTime EffectiveTime;
Byte FileStructureVersion; // = 1;
Byte ApplicationUse[512];
bool IsJoliet() const
{
if ((VolFlags & 1) != 0)
return false;
Byte b = EscapeSequence[2];
return (EscapeSequence[0] == 0x25 && EscapeSequence[1] == 0x2F &&
(b == 0x40 || b == 0x43 || b == 0x45));
}
};
struct CRef
{
CDir *Dir;
UInt32 Index;
};
const UInt32 kBlockSize = 1 << 11;
class CInArchive
{
CMyComPtr<IInStream> _stream;
UInt64 _position;
Byte m_Buffer[kBlockSize];
UInt32 m_BufferPos;
CDir _rootDir;
bool _bootIsDefined;
CBootRecordDescriptor _bootDesc;
void Skeep(size_t size);
void SkeepZeros(size_t size);
Byte ReadByte();
void ReadBytes(Byte *data, UInt32 size);
UInt16 ReadUInt16Spec();
UInt16 ReadUInt16();
UInt32 ReadUInt32Le();
UInt32 ReadUInt32Be();
UInt32 ReadUInt32();
UInt64 ReadUInt64();
UInt32 ReadDigits(int numDigits);
void ReadDateTime(CDateTime &d);
void ReadRecordingDateTime(CRecordingDateTime &t);
void ReadDirRecord2(CDirRecord &r, Byte len);
void ReadDirRecord(CDirRecord &r);
void ReadBootRecordDescriptor(CBootRecordDescriptor &d);
void ReadVolumeDescriptor(CVolumeDescriptor &d);
void SeekToBlock(UInt32 blockIndex);
void ReadDir(CDir &d, int level);
void CreateRefs(CDir &d);
void ReadBootInfo();
HRESULT Open2();
public:
HRESULT Open(IInStream *inStream);
void Clear();
UInt64 _archiveSize;
CRecordVector<CRef> Refs;
CObjectVector<CVolumeDescriptor> VolDescs;
int MainVolDescIndex;
UInt32 BlockSize;
CObjectVector<CBootInitialEntry> BootEntries;
bool IsJoliet() const { return VolDescs[MainVolDescIndex].IsJoliet(); }
UInt64 GetBootItemSize(int index) const
{
const CBootInitialEntry &be = BootEntries[index];
UInt64 size = be.GetSize();
if (be.BootMediaType == NBootMediaType::k1d2Floppy)
size = (1200 << 10);
else if (be.BootMediaType == NBootMediaType::k1d44Floppy)
size = (1440 << 10);
else if (be.BootMediaType == NBootMediaType::k2d88Floppy)
size = (2880 << 10);
UInt64 startPos = be.LoadRBA * BlockSize;
if (startPos < _archiveSize)
{
if (_archiveSize - startPos < size)
size = _archiveSize - startPos;
}
return size;
}
bool IsSusp;
int SuspSkipSize;
};
}}
#endif
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