diff options
Diffstat (limited to 'src/libs/7zip/unix/CPP/7zip/Archive/Chm/ChmIn.cpp')
| -rw-r--r-- | src/libs/7zip/unix/CPP/7zip/Archive/Chm/ChmIn.cpp | 937 |
1 files changed, 0 insertions, 937 deletions
diff --git a/src/libs/7zip/unix/CPP/7zip/Archive/Chm/ChmIn.cpp b/src/libs/7zip/unix/CPP/7zip/Archive/Chm/ChmIn.cpp deleted file mode 100644 index d52b9ba6c..000000000 --- a/src/libs/7zip/unix/CPP/7zip/Archive/Chm/ChmIn.cpp +++ /dev/null @@ -1,937 +0,0 @@ -// Archive/ChmIn.cpp - -#include "StdAfx.h" - -#include "Common/IntToString.h" -#include "Common/UTFConvert.h" - -#include "../../Common/LimitedStreams.h" - -#include "ChmIn.h" - -namespace NArchive { -namespace NChm { - -// define CHM_LOW, if you want to see low level items -// #define CHM_LOW - -static const GUID kChmLzxGuid = { 0x7FC28940, 0x9D31, 0x11D0, { 0x9B, 0x27, 0x00, 0xA0, 0xC9, 0x1E, 0x9C, 0x7C } }; -static const GUID kHelp2LzxGuid = { 0x0A9007C6, 0x4076, 0x11D3, { 0x87, 0x89, 0x00, 0x00, 0xF8, 0x10, 0x57, 0x54 } }; -static const GUID kDesGuid = { 0x67F6E4A2, 0x60BF, 0x11D3, { 0x85, 0x40, 0x00, 0xC0, 0x4F, 0x58, 0xC3, 0xCF } }; - -static bool AreGuidsEqual(REFGUID g1, REFGUID g2) -{ - if (g1.Data1 != g2.Data1 || - g1.Data2 != g2.Data2 || - g1.Data3 != g2.Data3) - return false; - for (int i = 0; i < 8; i++) - if (g1.Data4[i] != g2.Data4[i]) - return false; - return true; -} - -static char GetHex(Byte value) -{ - return (char)((value < 10) ? ('0' + value) : ('A' + (value - 10))); -} - -static void PrintByte(Byte b, AString &s) -{ - s += GetHex(b >> 4); - s += GetHex(b & 0xF); -} - -static void PrintUInt16(UInt16 v, AString &s) -{ - PrintByte((Byte)(v >> 8), s); - PrintByte((Byte)v, s); -} - -static void PrintUInt32(UInt32 v, AString &s) -{ - PrintUInt16((UInt16)(v >> 16), s); - PrintUInt16((UInt16)v, s); -} - -AString CMethodInfo::GetGuidString() const -{ - AString s; - s += '{'; - PrintUInt32(Guid.Data1, s); - s += '-'; - PrintUInt16(Guid.Data2, s); - s += '-'; - PrintUInt16(Guid.Data3, s); - s += '-'; - PrintByte(Guid.Data4[0], s); - PrintByte(Guid.Data4[1], s); - s += '-'; - for (int i = 2; i < 8; i++) - PrintByte(Guid.Data4[i], s); - s += '}'; - return s; -} - -bool CMethodInfo::IsLzx() const -{ - if (AreGuidsEqual(Guid, kChmLzxGuid)) - return true; - return AreGuidsEqual(Guid, kHelp2LzxGuid); -} - -bool CMethodInfo::IsDes() const -{ - return AreGuidsEqual(Guid, kDesGuid); -} - -UString CMethodInfo::GetName() const -{ - UString s; - if (IsLzx()) - { - s = L"LZX:"; - wchar_t temp[16]; - ConvertUInt32ToString(LzxInfo.GetNumDictBits(), temp); - s += temp; - } - else - { - AString s2; - if (IsDes()) - s2 = "DES"; - else - { - s2 = GetGuidString(); - if (ControlData.GetCapacity() > 0) - { - s2 += ':'; - for (size_t i = 0; i < ControlData.GetCapacity(); i++) - PrintByte(ControlData[i], s2); - } - } - ConvertUTF8ToUnicode(s2, s); - } - return s; -} - -bool CSectionInfo::IsLzx() const -{ - if (Methods.Size() != 1) - return false; - return Methods[0].IsLzx(); -} - -UString CSectionInfo::GetMethodName() const -{ - UString s; - if (!IsLzx()) - { - UString temp; - if (ConvertUTF8ToUnicode(Name, temp)) - s += temp; - s += L": "; - } - for (int i = 0; i < Methods.Size(); i++) - { - if (i != 0) - s += L' '; - s += Methods[i].GetName(); - } - return s; -} - -Byte CInArchive::ReadByte() -{ - Byte b; - if (!_inBuffer.ReadByte(b)) - throw 1; - return b; -} - -void CInArchive::Skip(size_t size) -{ - while (size-- != 0) - ReadByte(); -} - -void CInArchive::ReadBytes(Byte *data, UInt32 size) -{ - for (UInt32 i = 0; i < size; i++) - data[i] = ReadByte(); -} - -UInt16 CInArchive::ReadUInt16() -{ - UInt16 value = 0; - for (int i = 0; i < 2; i++) - value |= ((UInt16)(ReadByte()) << (8 * i)); - return value; -} - -UInt32 CInArchive::ReadUInt32() -{ - UInt32 value = 0; - for (int i = 0; i < 4; i++) - value |= ((UInt32)(ReadByte()) << (8 * i)); - return value; -} - -UInt64 CInArchive::ReadUInt64() -{ - UInt64 value = 0; - for (int i = 0; i < 8; i++) - value |= ((UInt64)(ReadByte()) << (8 * i)); - return value; -} - -UInt64 CInArchive::ReadEncInt() -{ - UInt64 val = 0;; - for (int i = 0; i < 10; i++) - { - Byte b = ReadByte(); - val |= (b & 0x7F); - if (b < 0x80) - return val; - val <<= 7; - } - throw 1; -} - -void CInArchive::ReadGUID(GUID &g) -{ - g.Data1 = ReadUInt32(); - g.Data2 = ReadUInt16(); - g.Data3 = ReadUInt16(); - ReadBytes(g.Data4, 8); -} - -void CInArchive::ReadString(int size, AString &s) -{ - s.Empty(); - while(size-- != 0) - { - char c = (char)ReadByte(); - if (c == 0) - { - Skip(size); - return; - } - s += c; - } -} - -void CInArchive::ReadUString(int size, UString &s) -{ - s.Empty(); - while(size-- != 0) - { - wchar_t c = ReadUInt16(); - if (c == 0) - { - Skip(2 * size); - return; - } - s += c; - } -} - -HRESULT CInArchive::ReadChunk(IInStream *inStream, UInt64 pos, UInt64 size) -{ - RINOK(inStream->Seek(pos, STREAM_SEEK_SET, NULL)); - CLimitedSequentialInStream *streamSpec = new CLimitedSequentialInStream; - CMyComPtr<ISequentialInStream> limitedStream(streamSpec); - streamSpec->SetStream(inStream); - streamSpec->Init(size); - _inBuffer.SetStream(limitedStream); - _inBuffer.Init(); - return S_OK; -} - -HRESULT CInArchive::ReadDirEntry(CDatabase &database) -{ - CItem item; - UInt64 nameLength = ReadEncInt(); - if (nameLength == 0 || nameLength >= 0x10000000) - return S_FALSE; - ReadString((int)nameLength, item.Name); - item.Section = ReadEncInt(); - item.Offset = ReadEncInt(); - item.Size = ReadEncInt(); - database.Items.Add(item); - return S_OK; -} - -HRESULT CInArchive::OpenChm(IInStream *inStream, CDatabase &database) -{ - UInt32 headerSize = ReadUInt32(); - if (headerSize != 0x60) - return S_FALSE; - UInt32 unknown1 = ReadUInt32(); - if (unknown1 != 0 && unknown1 != 1) // it's 0 in one .sll file - return S_FALSE; - /* UInt32 timeStamp = */ ReadUInt32(); - // Considered as a big-endian DWORD, it appears to contain seconds (MSB) and - // fractional seconds (second byte). - // The third and fourth bytes may contain even more fractional bits. - // The 4 least significant bits in the last byte are constant. - /* UInt32 lang = */ ReadUInt32(); - GUID g; - ReadGUID(g); // {7C01FD10-7BAA-11D0-9E0C-00A0-C922-E6EC} - ReadGUID(g); // {7C01FD11-7BAA-11D0-9E0C-00A0-C922-E6EC} - const int kNumSections = 2; - UInt64 sectionOffsets[kNumSections]; - UInt64 sectionSizes[kNumSections]; - int i; - for (i = 0; i < kNumSections; i++) - { - sectionOffsets[i] = ReadUInt64(); - sectionSizes[i] = ReadUInt64(); - } - // if (chmVersion == 3) - database.ContentOffset = ReadUInt64(); - /* - else - database.ContentOffset = _startPosition + 0x58 - */ - - /* - // Section 0 - ReadChunk(inStream, sectionOffsets[0], sectionSizes[0]); - if (sectionSizes[0] != 0x18) - return S_FALSE; - ReadUInt32(); // unknown: 01FE - ReadUInt32(); // unknown: 0 - UInt64 fileSize = ReadUInt64(); - ReadUInt32(); // unknown: 0 - ReadUInt32(); // unknown: 0 - */ - - // Section 1: The Directory Listing - ReadChunk(inStream, sectionOffsets[1], sectionSizes[1]); - if (ReadUInt32() != NHeader::kItspSignature) - return S_FALSE; - if (ReadUInt32() != 1) // version - return S_FALSE; - /* UInt32 dirHeaderSize = */ ReadUInt32(); - ReadUInt32(); // 0x0A (unknown) - UInt32 dirChunkSize = ReadUInt32(); // $1000 - if (dirChunkSize < 32) - return S_FALSE; - /* UInt32 density = */ ReadUInt32(); // "Density" of quickref section, usually 2. - /* UInt32 depth = */ ReadUInt32(); // Depth of the index tree: 1 there is no index, - // 2 if there is one level of PMGI chunks. - - /* UInt32 chunkNumber = */ ReadUInt32(); // Chunk number of root index chunk, -1 if there is none - // (though at least one file has 0 despite there being no - // index chunk, probably a bug.) - /* UInt32 firstPmglChunkNumber = */ ReadUInt32(); // Chunk number of first PMGL (listing) chunk - /* UInt32 lastPmglChunkNumber = */ ReadUInt32(); // Chunk number of last PMGL (listing) chunk - ReadUInt32(); // -1 (unknown) - UInt32 numDirChunks = ReadUInt32(); // Number of directory chunks (total) - /* UInt32 windowsLangId = */ ReadUInt32(); - ReadGUID(g); // {5D02926A-212E-11D0-9DF9-00A0C922E6EC} - ReadUInt32(); // 0x54 (This is the length again) - ReadUInt32(); // -1 (unknown) - ReadUInt32(); // -1 (unknown) - ReadUInt32(); // -1 (unknown) - - for (UInt32 ci = 0; ci < numDirChunks; ci++) - { - UInt64 chunkPos = _inBuffer.GetProcessedSize(); - if (ReadUInt32() == NHeader::kPmglSignature) - { - // The quickref area is written backwards from the end of the chunk. - // One quickref entry exists for every n entries in the file, where n - // is calculated as 1 + (1 << quickref density). So for density = 2, n = 5. - - UInt32 quickrefLength = ReadUInt32(); // Length of free space and/or quickref area at end of directory chunk - if (quickrefLength > dirChunkSize || quickrefLength < 2) - return S_FALSE; - ReadUInt32(); // Always 0 - ReadUInt32(); // Chunk number of previous listing chunk when reading - // directory in sequence (-1 if this is the first listing chunk) - ReadUInt32(); // Chunk number of next listing chunk when reading - // directory in sequence (-1 if this is the last listing chunk) - int numItems = 0; - for (;;) - { - UInt64 offset = _inBuffer.GetProcessedSize() - chunkPos; - UInt32 offsetLimit = dirChunkSize - quickrefLength; - if (offset > offsetLimit) - return S_FALSE; - if (offset == offsetLimit) - break; - RINOK(ReadDirEntry(database)); - numItems++; - } - Skip(quickrefLength - 2); - if (ReadUInt16() != numItems) - return S_FALSE; - } - else - Skip(dirChunkSize - 4); - } - return S_OK; -} - -HRESULT CInArchive::OpenHelp2(IInStream *inStream, CDatabase &database) -{ - if (ReadUInt32() != 1) // version - return S_FALSE; - if (ReadUInt32() != 0x28) // Location of header section table - return S_FALSE; - UInt32 numHeaderSections = ReadUInt32(); - const int kNumHeaderSectionsMax = 5; - if (numHeaderSections != kNumHeaderSectionsMax) - return S_FALSE; - ReadUInt32(); // Length of post-header table - GUID g; - ReadGUID(g); // {0A9007C1-4076-11D3-8789-0000F8105754} - - // header section table - UInt64 sectionOffsets[kNumHeaderSectionsMax]; - UInt64 sectionSizes[kNumHeaderSectionsMax]; - UInt32 i; - for (i = 0; i < numHeaderSections; i++) - { - sectionOffsets[i] = ReadUInt64(); - sectionSizes[i] = ReadUInt64(); - } - - // Post-Header - ReadUInt32(); // 2 - ReadUInt32(); // 0x98: offset to CAOL from beginning of post-header) - // ----- Directory information - ReadUInt64(); // Chunk number of top-level AOLI chunk in directory, or -1 - ReadUInt64(); // Chunk number of first AOLL chunk in directory - ReadUInt64(); // Chunk number of last AOLL chunk in directory - ReadUInt64(); // 0 (unknown) - ReadUInt32(); // $2000 (Directory chunk size of directory) - ReadUInt32(); // Quickref density for main directory, usually 2 - ReadUInt32(); // 0 (unknown) - ReadUInt32(); // Depth of main directory index tree - // 1 there is no index, 2 if there is one level of AOLI chunks. - ReadUInt64(); // 0 (unknown) - UInt64 numDirEntries = ReadUInt64(); // Number of directory entries - // ----- Directory Index Information - ReadUInt64(); // -1 (unknown, probably chunk number of top-level AOLI in directory index) - ReadUInt64(); // Chunk number of first AOLL chunk in directory index - ReadUInt64(); // Chunk number of last AOLL chunk in directory index - ReadUInt64(); // 0 (unknown) - ReadUInt32(); // $200 (Directory chunk size of directory index) - ReadUInt32(); // Quickref density for directory index, usually 2 - ReadUInt32(); // 0 (unknown) - ReadUInt32(); // Depth of directory index index tree. - ReadUInt64(); // Possibly flags -- sometimes 1, sometimes 0. - ReadUInt64(); // Number of directory index entries (same as number of AOLL - // chunks in main directory) - - // (The obvious guess for the following two fields, which recur in a number - // of places, is they are maximum sizes for the directory and directory index. - // However, I have seen no direct evidence that this is the case.) - - ReadUInt32(); // $100000 (Same as field following chunk size in directory) - ReadUInt32(); // $20000 (Same as field following chunk size in directory index) - - ReadUInt64(); // 0 (unknown) - if (ReadUInt32() != NHeader::kCaolSignature) - return S_FALSE; - if (ReadUInt32() != 2) // (Most likely a version number) - return S_FALSE; - UInt32 caolLength = ReadUInt32(); // $50 (Length of the CAOL section, which includes the ITSF section) - if (caolLength >= 0x2C) - { - /* UInt32 c7 = */ ReadUInt16(); // Unknown. Remains the same when identical files are built. - // Does not appear to be a checksum. Many files have - // 'HH' (HTML Help?) here, indicating this may be a compiler ID - // field. But at least one ITOL/ITLS compiler does not set this - // field to a constant value. - ReadUInt16(); // 0 (Unknown. Possibly part of 00A4 field) - ReadUInt32(); // Unknown. Two values have been seen -- $43ED, and 0. - ReadUInt32(); // $2000 (Directory chunk size of directory) - ReadUInt32(); // $200 (Directory chunk size of directory index) - ReadUInt32(); // $100000 (Same as field following chunk size in directory) - ReadUInt32(); // $20000 (Same as field following chunk size in directory index) - ReadUInt32(); // 0 (unknown) - ReadUInt32(); // 0 (Unknown) - if (caolLength == 0x2C) - { - database.ContentOffset = 0; - database.NewFormat = true; - } - else if (caolLength == 0x50) - { - ReadUInt32(); // 0 (Unknown) - if (ReadUInt32() != NHeader::kItsfSignature) - return S_FALSE; - if (ReadUInt32() != 4) // $4 (Version number -- CHM uses 3) - return S_FALSE; - if (ReadUInt32() != 0x20) // $20 (length of ITSF) - return S_FALSE; - UInt32 unknown = ReadUInt32(); - if (unknown != 0 && unknown != 1) // = 0 for some HxW files, 1 in other cases; - return S_FALSE; - database.ContentOffset = _startPosition + ReadUInt64(); - /* UInt32 timeStamp = */ ReadUInt32(); - // A timestamp of some sort. - // Considered as a big-endian DWORD, it appears to contain - // seconds (MSB) and fractional seconds (second byte). - // The third and fourth bytes may contain even more fractional - // bits. The 4 least significant bits in the last byte are constant. - /* UInt32 lang = */ ReadUInt32(); // BE? - } - else - return S_FALSE; - } - - /* - // Section 0 - ReadChunk(inStream, _startPosition + sectionOffsets[0], sectionSizes[0]); - if (sectionSizes[0] != 0x18) - return S_FALSE; - ReadUInt32(); // unknown: 01FE - ReadUInt32(); // unknown: 0 - UInt64 fileSize = ReadUInt64(); - ReadUInt32(); // unknown: 0 - ReadUInt32(); // unknown: 0 - */ - - // Section 1: The Directory Listing - ReadChunk(inStream, _startPosition + sectionOffsets[1], sectionSizes[1]); - if (ReadUInt32() != NHeader::kIfcmSignature) - return S_FALSE; - if (ReadUInt32() != 1) // (probably a version number) - return S_FALSE; - UInt32 dirChunkSize = ReadUInt32(); // $2000 - if (dirChunkSize < 64) - return S_FALSE; - ReadUInt32(); // $100000 (unknown) - ReadUInt32(); // -1 (unknown) - ReadUInt32(); // -1 (unknown) - UInt32 numDirChunks = ReadUInt32(); - ReadUInt32(); // 0 (unknown, probably high word of above) - - for (UInt32 ci = 0; ci < numDirChunks; ci++) - { - UInt64 chunkPos = _inBuffer.GetProcessedSize(); - if (ReadUInt32() == NHeader::kAollSignature) - { - UInt32 quickrefLength = ReadUInt32(); // Length of quickref area at end of directory chunk - if (quickrefLength > dirChunkSize || quickrefLength < 2) - return S_FALSE; - ReadUInt64(); // Directory chunk number - // This must match physical position in file, that is - // the chunk size times the chunk number must be the - // offset from the end of the directory header. - ReadUInt64(); // Chunk number of previous listing chunk when reading - // directory in sequence (-1 if first listing chunk) - ReadUInt64(); // Chunk number of next listing chunk when reading - // directory in sequence (-1 if last listing chunk) - ReadUInt64(); // Number of first listing entry in this chunk - ReadUInt32(); // 1 (unknown -- other values have also been seen here) - ReadUInt32(); // 0 (unknown) - - int numItems = 0; - for (;;) - { - UInt64 offset = _inBuffer.GetProcessedSize() - chunkPos; - UInt32 offsetLimit = dirChunkSize - quickrefLength; - if (offset > offsetLimit) - return S_FALSE; - if (offset == offsetLimit) - break; - if (database.NewFormat) - { - UInt16 nameLength = ReadUInt16(); - if (nameLength == 0) - return S_FALSE; - UString name; - ReadUString((int)nameLength, name); - AString s; - ConvertUnicodeToUTF8(name, s); - Byte b = ReadByte(); - s += ' '; - PrintByte(b, s); - s += ' '; - UInt64 len = ReadEncInt(); - // then number of items ? - // then length ? - // then some data (binary encoding?) - while (len-- != 0) - { - b = ReadByte(); - PrintByte(b, s); - } - database.NewFormatString += s; - database.NewFormatString += "\r\n"; - } - else - { - RINOK(ReadDirEntry(database)); - } - numItems++; - } - Skip(quickrefLength - 2); - if (ReadUInt16() != numItems) - return S_FALSE; - if (numItems > numDirEntries) - return S_FALSE; - numDirEntries -= numItems; - } - else - Skip(dirChunkSize - 4); - } - return numDirEntries == 0 ? S_OK : S_FALSE; -} - -HRESULT CInArchive::DecompressStream(IInStream *inStream, const CDatabase &database, const AString &name) -{ - int index = database.FindItem(name); - if (index < 0) - return S_FALSE; - const CItem &item = database.Items[index]; - _chunkSize = item.Size; - return ReadChunk(inStream, database.ContentOffset + item.Offset, item.Size); -} - - -#define DATA_SPACE "::DataSpace/" -static const char *kNameList = DATA_SPACE "NameList"; -static const char *kStorage = DATA_SPACE "Storage/"; -static const char *kContent = "Content"; -static const char *kControlData = "ControlData"; -static const char *kSpanInfo = "SpanInfo"; -static const char *kTransform = "Transform/"; -static const char *kResetTable = "/InstanceData/ResetTable"; -static const char *kTransformList = "List"; - -static AString GetSectionPrefix(const AString &name) -{ - return AString(kStorage) + name + AString("/"); -} - -#define RINOZ(x) { int __tt = (x); if (__tt != 0) return __tt; } - -static int CompareFiles(const int *p1, const int *p2, void *param) -{ - const CObjectVector<CItem> &items = *(const CObjectVector<CItem> *)param; - const CItem &item1 = items[*p1]; - const CItem &item2 = items[*p2]; - bool isDir1 = item1.IsDir(); - bool isDir2 = item2.IsDir(); - if (isDir1 && !isDir2) - return -1; - if (isDir2) - { - if (isDir1) - return MyCompare(*p1, *p2); - return 1; - } - RINOZ(MyCompare(item1.Section, item2.Section)); - RINOZ(MyCompare(item1.Offset, item2.Offset)); - RINOZ(MyCompare(item1.Size, item2.Size)); - return MyCompare(*p1, *p2); -} - -void CFilesDatabase::SetIndices() -{ - for (int i = 0; i < Items.Size(); i++) - { - const CItem &item = Items[i]; - if (item.IsUserItem() && item.Name.Length() != 1) - Indices.Add(i); - } -} - -void CFilesDatabase::Sort() -{ - Indices.Sort(CompareFiles, (void *)&Items); -} - -bool CFilesDatabase::Check() -{ - UInt64 maxPos = 0; - UInt64 prevSection = 0; - for(int i = 0; i < Indices.Size(); i++) - { - const CItem &item = Items[Indices[i]]; - if (item.Section == 0 || item.IsDir()) - continue; - if (item.Section != prevSection) - { - prevSection = item.Section; - maxPos = 0; - continue; - } - if (item.Offset < maxPos) - return false; - maxPos = item.Offset + item.Size; - if (maxPos < item.Offset) - return false; - } - return true; -} - -HRESULT CInArchive::OpenHighLevel(IInStream *inStream, CFilesDatabase &database) -{ - { - // The NameList file - RINOK(DecompressStream(inStream, database, kNameList)); - /* UInt16 length = */ ReadUInt16(); - UInt16 numSections = ReadUInt16(); - for (int i = 0; i < numSections; i++) - { - CSectionInfo section; - UInt16 nameLength = ReadUInt16(); - UString name; - ReadUString(nameLength, name); - if (ReadUInt16() != 0) - return S_FALSE; - if (!ConvertUnicodeToUTF8(name, section.Name)) - return S_FALSE; - database.Sections.Add(section); - } - } - - int i; - for (i = 1; i < database.Sections.Size(); i++) - { - CSectionInfo §ion = database.Sections[i]; - AString sectionPrefix = GetSectionPrefix(section.Name); - { - // Content - int index = database.FindItem(sectionPrefix + kContent); - if (index < 0) - return S_FALSE; - const CItem &item = database.Items[index]; - section.Offset = item.Offset; - section.CompressedSize = item.Size; - } - AString transformPrefix = sectionPrefix + kTransform; - if (database.Help2Format) - { - // Transform List - RINOK(DecompressStream(inStream, database, transformPrefix + kTransformList)); - if ((_chunkSize & 0xF) != 0) - return S_FALSE; - int numGuids = (int)(_chunkSize / 0x10); - if (numGuids < 1) - return S_FALSE; - for (int i = 0; i < numGuids; i++) - { - CMethodInfo method; - ReadGUID(method.Guid); - section.Methods.Add(method); - } - } - else - { - CMethodInfo method; - method.Guid = kChmLzxGuid; - section.Methods.Add(method); - } - - { - // Control Data - RINOK(DecompressStream(inStream, database, sectionPrefix + kControlData)); - for (int mi = 0; mi < section.Methods.Size(); mi++) - { - CMethodInfo &method = section.Methods[mi]; - UInt32 numDWORDS = ReadUInt32(); - if (method.IsLzx()) - { - if (numDWORDS < 5) - return S_FALSE; - if (ReadUInt32() != NHeader::kLzxcSignature) - return S_FALSE; - CLzxInfo &li = method.LzxInfo; - li.Version = ReadUInt32(); - if (li.Version != 2 && li.Version != 3) - return S_FALSE; - li.ResetInterval = ReadUInt32(); - li.WindowSize = ReadUInt32(); - li.CacheSize = ReadUInt32(); - if ( - li.ResetInterval != 1 && - li.ResetInterval != 2 && - li.ResetInterval != 4 && - li.ResetInterval != 8 && - li.ResetInterval != 16 && - li.ResetInterval != 32 && - li.ResetInterval != 64) - return S_FALSE; - if ( - li.WindowSize != 1 && - li.WindowSize != 2 && - li.WindowSize != 4 && - li.WindowSize != 8 && - li.WindowSize != 16 && - li.WindowSize != 32 && - li.WindowSize != 64) - return S_FALSE; - numDWORDS -= 5; - while (numDWORDS-- != 0) - ReadUInt32(); - } - else - { - UInt32 numBytes = numDWORDS * 4; - method.ControlData.SetCapacity(numBytes); - ReadBytes(method.ControlData, numBytes); - } - } - } - - { - // SpanInfo - RINOK(DecompressStream(inStream, database, sectionPrefix + kSpanInfo)); - section.UncompressedSize = ReadUInt64(); - } - - // read ResetTable for LZX - for (int mi = 0; mi < section.Methods.Size(); mi++) - { - CMethodInfo &method = section.Methods[mi]; - if (method.IsLzx()) - { - // ResetTable; - RINOK(DecompressStream(inStream, database, transformPrefix + - method.GetGuidString() + kResetTable)); - CResetTable &rt = method.LzxInfo.ResetTable; - if (_chunkSize < 4) - { - if (_chunkSize != 0) - return S_FALSE; - // ResetTable is empty in .chw files - if (section.UncompressedSize != 0) - return S_FALSE; - rt.UncompressedSize = 0; - rt.CompressedSize = 0; - rt.BlockSize = 0; - } - else - { - UInt32 ver = ReadUInt32(); // 2 unknown (possibly a version number) - if (ver != 2 && ver != 3) - return S_FALSE; - UInt32 numEntries = ReadUInt32(); - if (ReadUInt32() != 8) // Size of table entry (bytes) - return S_FALSE; - if (ReadUInt32() != 0x28) // Length of table header - return S_FALSE; - rt.UncompressedSize = ReadUInt64(); - rt.CompressedSize = ReadUInt64(); - rt.BlockSize = ReadUInt64(); // 0x8000 block size for locations below - if (rt.BlockSize != 0x8000) - return S_FALSE; - rt.ResetOffsets.Reserve(numEntries); - for (UInt32 i = 0; i < numEntries; i++) - rt.ResetOffsets.Add(ReadUInt64()); - } - } - } - } - - database.SetIndices(); - database.Sort(); - return database.Check() ? S_OK : S_FALSE; -} - -HRESULT CInArchive::Open2(IInStream *inStream, - const UInt64 *searchHeaderSizeLimit, - CFilesDatabase &database) -{ - database.Clear(); - - RINOK(inStream->Seek(0, STREAM_SEEK_CUR, &_startPosition)); - - database.Help2Format = false; - const UInt32 chmVersion = 3; - { - if (!_inBuffer.Create(1 << 14)) - return E_OUTOFMEMORY; - _inBuffer.SetStream(inStream); - _inBuffer.Init(); - UInt64 value = 0; - const int kSignatureSize = 8; - UInt64 hxsSignature = NHeader::GetHxsSignature(); - UInt64 chmSignature = ((UInt64)chmVersion << 32)| NHeader::kItsfSignature; - UInt64 limit = 1 << 18; - if (searchHeaderSizeLimit) - if (limit > *searchHeaderSizeLimit) - limit = *searchHeaderSizeLimit; - - for (;;) - { - Byte b; - if (!_inBuffer.ReadByte(b)) - return S_FALSE; - value >>= 8; - value |= ((UInt64)b) << ((kSignatureSize - 1) * 8); - if (_inBuffer.GetProcessedSize() >= kSignatureSize) - { - if (value == chmSignature) - break; - if (value == hxsSignature) - { - database.Help2Format = true; - break; - } - if (_inBuffer.GetProcessedSize() > limit) - return S_FALSE; - } - } - _startPosition += _inBuffer.GetProcessedSize() - kSignatureSize; - } - - if (database.Help2Format) - { - RINOK(OpenHelp2(inStream, database)); - if (database.NewFormat) - return S_OK; - } - else - { - RINOK(OpenChm(inStream, database)); - } - - #ifndef CHM_LOW - try - { - HRESULT res = OpenHighLevel(inStream, database); - if (res == S_FALSE) - { - database.HighLevelClear(); - return S_OK; - } - RINOK(res); - database.LowLevel = false; - } - catch(...) - { - return S_OK; - } - #endif - return S_OK; -} - -HRESULT CInArchive::Open(IInStream *inStream, - const UInt64 *searchHeaderSizeLimit, - CFilesDatabase &database) -{ - try - { - HRESULT res = Open2(inStream, searchHeaderSizeLimit, database); - _inBuffer.ReleaseStream(); - return res; - } - catch(...) - { - _inBuffer.ReleaseStream(); - throw; - } -} - -}} |