diff options
Diffstat (limited to 'src/libs/7zip/win/CPP/7zip/Archive/Iso/IsoIn.cpp')
| -rw-r--r-- | src/libs/7zip/win/CPP/7zip/Archive/Iso/IsoIn.cpp | 453 |
1 files changed, 453 insertions, 0 deletions
diff --git a/src/libs/7zip/win/CPP/7zip/Archive/Iso/IsoIn.cpp b/src/libs/7zip/win/CPP/7zip/Archive/Iso/IsoIn.cpp new file mode 100644 index 000000000..7ed618d29 --- /dev/null +++ b/src/libs/7zip/win/CPP/7zip/Archive/Iso/IsoIn.cpp @@ -0,0 +1,453 @@ +// Archive/IsoIn.cpp + +#include "StdAfx.h" + +#include "IsoIn.h" + +#include "../../Common/StreamUtils.h" + +namespace NArchive { +namespace NIso { + +Byte CInArchive::ReadByte() +{ + if (m_BufferPos >= BlockSize) + m_BufferPos = 0; + if (m_BufferPos == 0) + { + size_t processedSize = BlockSize; + if (ReadStream(_stream, m_Buffer, &processedSize) != S_OK) + throw 1; + if (processedSize != BlockSize) + throw 1; + } + Byte b = m_Buffer[m_BufferPos++]; + _position++; + return b; +} + +void CInArchive::ReadBytes(Byte *data, UInt32 size) +{ + for (UInt32 i = 0; i < size; i++) + data[i] = ReadByte(); +} + +void CInArchive::Skip(size_t size) +{ + while (size-- != 0) + ReadByte(); +} + +void CInArchive::SkipZeros(size_t size) +{ + while (size-- != 0) + { + Byte b = ReadByte(); + if (b != 0) + throw 1; + } +} + +UInt16 CInArchive::ReadUInt16Spec() +{ + UInt16 value = 0; + for (int i = 0; i < 2; i++) + value |= ((UInt16)(ReadByte()) << (8 * i)); + return value; +} + + +UInt16 CInArchive::ReadUInt16() +{ + Byte b[4]; + ReadBytes(b, 4); + UInt32 value = 0; + for (int i = 0; i < 2; i++) + { + if (b[i] != b[3 - i]) + IncorrectBigEndian = true; + value |= ((UInt16)(b[i]) << (8 * i)); + } + return (UInt16)value; +} + +UInt32 CInArchive::ReadUInt32Le() +{ + UInt32 value = 0; + for (int i = 0; i < 4; i++) + value |= ((UInt32)(ReadByte()) << (8 * i)); + return value; +} + +UInt32 CInArchive::ReadUInt32Be() +{ + UInt32 value = 0; + for (int i = 0; i < 4; i++) + { + value <<= 8; + value |= ReadByte(); + } + return value; +} + +UInt32 CInArchive::ReadUInt32() +{ + Byte b[8]; + ReadBytes(b, 8); + UInt32 value = 0; + for (int i = 0; i < 4; i++) + { + if (b[i] != b[7 - i]) + throw 1; + value |= ((UInt32)(b[i]) << (8 * i)); + } + return value; +} + +UInt32 CInArchive::ReadDigits(int numDigits) +{ + UInt32 res = 0; + for (int i = 0; i < numDigits; i++) + { + Byte b = ReadByte(); + if (b < '0' || b > '9') + { + if (b == 0) // it's bug in some CD's + b = '0'; + else + throw 1; + } + UInt32 d = (UInt32)(b - '0'); + res *= 10; + res += d; + } + return res; +} + +void CInArchive::ReadDateTime(CDateTime &d) +{ + d.Year = (UInt16)ReadDigits(4); + d.Month = (Byte)ReadDigits(2); + d.Day = (Byte)ReadDigits(2); + d.Hour = (Byte)ReadDigits(2); + d.Minute = (Byte)ReadDigits(2); + d.Second = (Byte)ReadDigits(2); + d.Hundredths = (Byte)ReadDigits(2); + d.GmtOffset = (signed char)ReadByte(); +} + +void CInArchive::ReadBootRecordDescriptor(CBootRecordDescriptor &d) +{ + ReadBytes(d.BootSystemId, sizeof(d.BootSystemId)); + ReadBytes(d.BootId, sizeof(d.BootId)); + ReadBytes(d.BootSystemUse, sizeof(d.BootSystemUse)); +} + +void CInArchive::ReadRecordingDateTime(CRecordingDateTime &t) +{ + t.Year = ReadByte(); + t.Month = ReadByte(); + t.Day = ReadByte(); + t.Hour = ReadByte(); + t.Minute = ReadByte(); + t.Second = ReadByte(); + t.GmtOffset = (signed char)ReadByte(); +} + +void CInArchive::ReadDirRecord2(CDirRecord &r, Byte len) +{ + r.ExtendedAttributeRecordLen = ReadByte(); + if (r.ExtendedAttributeRecordLen != 0) + throw 1; + r.ExtentLocation = ReadUInt32(); + r.DataLength = ReadUInt32(); + ReadRecordingDateTime(r.DateTime); + r.FileFlags = ReadByte(); + r.FileUnitSize = ReadByte(); + r.InterleaveGapSize = ReadByte(); + r.VolSequenceNumber = ReadUInt16(); + Byte idLen = ReadByte(); + r.FileId.SetCapacity(idLen); + ReadBytes((Byte *)r.FileId, idLen); + int padSize = 1 - (idLen & 1); + + // SkipZeros(1 - (idLen & 1)); + Skip(1 - (idLen & 1)); // it's bug in some cd's. Must be zeros + + int curPos = 33 + idLen + padSize; + if (curPos > len) + throw 1; + int rem = len - curPos; + r.SystemUse.SetCapacity(rem); + ReadBytes((Byte *)r.SystemUse, rem); +} + +void CInArchive::ReadDirRecord(CDirRecord &r) +{ + Byte len = ReadByte(); + // Some CDs can have incorrect value len = 48 ('0') in VolumeDescriptor. + // But maybe we must use real "len" for other records. + len = 34; + ReadDirRecord2(r, len); +} + +void CInArchive::ReadVolumeDescriptor(CVolumeDescriptor &d) +{ + d.VolFlags = ReadByte(); + ReadBytes(d.SystemId, sizeof(d.SystemId)); + ReadBytes(d.VolumeId, sizeof(d.VolumeId)); + SkipZeros(8); + d.VolumeSpaceSize = ReadUInt32(); + ReadBytes(d.EscapeSequence, sizeof(d.EscapeSequence)); + d.VolumeSetSize = ReadUInt16(); + d.VolumeSequenceNumber = ReadUInt16(); + d.LogicalBlockSize = ReadUInt16(); + d.PathTableSize = ReadUInt32(); + d.LPathTableLocation = ReadUInt32Le(); + d.LOptionalPathTableLocation = ReadUInt32Le(); + d.MPathTableLocation = ReadUInt32Be(); + d.MOptionalPathTableLocation = ReadUInt32Be(); + ReadDirRecord(d.RootDirRecord); + ReadBytes(d.VolumeSetId, sizeof(d.VolumeSetId)); + ReadBytes(d.PublisherId, sizeof(d.PublisherId)); + ReadBytes(d.DataPreparerId, sizeof(d.DataPreparerId)); + ReadBytes(d.ApplicationId, sizeof(d.ApplicationId)); + ReadBytes(d.CopyrightFileId, sizeof(d.CopyrightFileId)); + ReadBytes(d.AbstractFileId, sizeof(d.AbstractFileId)); + ReadBytes(d.BibFileId, sizeof(d.BibFileId)); + ReadDateTime(d.CTime); + ReadDateTime(d.MTime); + ReadDateTime(d.ExpirationTime); + ReadDateTime(d.EffectiveTime); + d.FileStructureVersion = ReadByte(); // = 1 + SkipZeros(1); + ReadBytes(d.ApplicationUse, sizeof(d.ApplicationUse)); + SkipZeros(653); +} + +static const Byte kSig_CD001[5] = { 'C', 'D', '0', '0', '1' }; + +static const Byte kSig_NSR02[5] = { 'N', 'S', 'R', '0', '2' }; +static const Byte kSig_NSR03[5] = { 'N', 'S', 'R', '0', '3' }; +static const Byte kSig_BEA01[5] = { 'B', 'E', 'A', '0', '1' }; +static const Byte kSig_TEA01[5] = { 'T', 'E', 'A', '0', '1' }; + +static inline bool CheckSignature(const Byte *sig, const Byte *data) +{ + for (int i = 0; i < 5; i++) + if (sig[i] != data[i]) + return false; + return true; +} + +void CInArchive::SeekToBlock(UInt32 blockIndex) +{ + if (_stream->Seek((UInt64)blockIndex * VolDescs[MainVolDescIndex].LogicalBlockSize, STREAM_SEEK_SET, &_position) != S_OK) + throw 1; + m_BufferPos = 0; +} + +void CInArchive::ReadDir(CDir &d, int level) +{ + if (!d.IsDir()) + return; + SeekToBlock(d.ExtentLocation); + UInt64 startPos = _position; + + bool firstItem = true; + for (;;) + { + UInt64 offset = _position - startPos; + if (offset >= d.DataLength) + break; + Byte len = ReadByte(); + if (len == 0) + continue; + CDir subItem; + ReadDirRecord2(subItem, len); + if (firstItem && level == 0) + IsSusp = subItem.CheckSusp(SuspSkipSize); + + if (!subItem.IsSystemItem()) + d._subItems.Add(subItem); + + firstItem = false; + } + for (int i = 0; i < d._subItems.Size(); i++) + ReadDir(d._subItems[i], level + 1); +} + +void CInArchive::CreateRefs(CDir &d) +{ + if (!d.IsDir()) + return; + for (int i = 0; i < d._subItems.Size(); i++) + { + CRef ref; + CDir &subItem = d._subItems[i]; + subItem.Parent = &d; + ref.Dir = &d; + ref.Index = i; + Refs.Add(ref); + CreateRefs(subItem); + } +} + +void CInArchive::ReadBootInfo() +{ + if (!_bootIsDefined) + return; + if (memcmp(_bootDesc.BootSystemId, kElToritoSpec, sizeof(_bootDesc.BootSystemId)) != 0) + return; + + const Byte *p = (const Byte *)_bootDesc.BootSystemUse; + UInt32 blockIndex = p[0] | ((UInt32)p[1] << 8) | ((UInt32)p[2] << 16) | ((UInt32)p[3] << 24); + SeekToBlock(blockIndex); + Byte b = ReadByte(); + if (b != NBootEntryId::kValidationEntry) + return; + { + CBootValidationEntry e; + e.PlatformId = ReadByte(); + if (ReadUInt16Spec() != 0) + throw 1; + ReadBytes(e.Id, sizeof(e.Id)); + /* UInt16 checkSum = */ ReadUInt16Spec(); + if (ReadByte() != 0x55) + throw 1; + if (ReadByte() != 0xAA) + throw 1; + } + b = ReadByte(); + if (b == NBootEntryId::kInitialEntryBootable || b == NBootEntryId::kInitialEntryNotBootable) + { + CBootInitialEntry e; + e.Bootable = (b == NBootEntryId::kInitialEntryBootable); + e.BootMediaType = ReadByte(); + e.LoadSegment = ReadUInt16Spec(); + e.SystemType = ReadByte(); + if (ReadByte() != 0) + throw 1; + e.SectorCount = ReadUInt16Spec(); + e.LoadRBA = ReadUInt32Le(); + if (ReadByte() != 0) + throw 1; + BootEntries.Add(e); + } + else + return; +} + +HRESULT CInArchive::Open2() +{ + Clear(); + RINOK(_stream->Seek(kStartPos, STREAM_SEEK_CUR, &_position)); + + m_BufferPos = 0; + BlockSize = kBlockSize; + for (;;) + { + Byte sig[7]; + ReadBytes(sig, 7); + Byte ver = sig[6]; + if (!CheckSignature(kSig_CD001, sig + 1)) + { + return S_FALSE; + /* + if (sig[0] != 0 || ver != 1) + break; + if (CheckSignature(kSig_BEA01, sig + 1)) + { + } + else if (CheckSignature(kSig_TEA01, sig + 1)) + { + break; + } + else if (CheckSignature(kSig_NSR02, sig + 1)) + { + } + else + break; + SkipZeros(0x800 - 7); + continue; + */ + } + // version = 2 for ISO 9660:1999? + if (ver > 2) + throw S_FALSE; + + if (sig[0] == NVolDescType::kTerminator) + { + break; + // Skip(0x800 - 7); + // continue; + } + switch(sig[0]) + { + case NVolDescType::kBootRecord: + { + _bootIsDefined = true; + ReadBootRecordDescriptor(_bootDesc); + break; + } + case NVolDescType::kPrimaryVol: + case NVolDescType::kSupplementaryVol: + { + // some ISOs have two PrimaryVols. + CVolumeDescriptor vd; + ReadVolumeDescriptor(vd); + if (sig[0] == NVolDescType::kPrimaryVol) + { + // some burners write "Joliet" Escape Sequence to primary volume + memset(vd.EscapeSequence, 0, sizeof(vd.EscapeSequence)); + } + VolDescs.Add(vd); + break; + } + default: + break; + } + } + if (VolDescs.IsEmpty()) + return S_FALSE; + for (MainVolDescIndex = VolDescs.Size() - 1; MainVolDescIndex > 0; MainVolDescIndex--) + if (VolDescs[MainVolDescIndex].IsJoliet()) + break; + // MainVolDescIndex = 0; // to read primary volume + const CVolumeDescriptor &vd = VolDescs[MainVolDescIndex]; + if (vd.LogicalBlockSize != kBlockSize) + return S_FALSE; + (CDirRecord &)_rootDir = vd.RootDirRecord; + ReadDir(_rootDir, 0); + CreateRefs(_rootDir); + ReadBootInfo(); + return S_OK; +} + +HRESULT CInArchive::Open(IInStream *inStream) +{ + _stream = inStream; + UInt64 pos; + RINOK(_stream->Seek(0, STREAM_SEEK_CUR, &pos)); + RINOK(_stream->Seek(0, STREAM_SEEK_END, &_archiveSize)); + RINOK(_stream->Seek(pos, STREAM_SEEK_SET, &_position)); + HRESULT res = S_FALSE; + try { res = Open2(); } + catch(...) { Clear(); res = S_FALSE; } + _stream.Release(); + return res; +} + +void CInArchive::Clear() +{ + IncorrectBigEndian = false; + Refs.Clear(); + _rootDir.Clear(); + VolDescs.Clear(); + _bootIsDefined = false; + BootEntries.Clear(); + SuspSkipSize = 0; + IsSusp = false; +} + +}} |