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// ZipOut.cpp
#include "StdAfx.h"
#include "../../Common/OffsetStream.h"
#include "ZipOut.h"
namespace NArchive {
namespace NZip {
void COutArchive::Create(IOutStream *outStream)
{
if (!m_OutBuffer.Create(1 << 16))
throw CSystemException(E_OUTOFMEMORY);
m_Stream = outStream;
m_OutBuffer.SetStream(outStream);
m_OutBuffer.Init();
m_BasePosition = 0;
}
void COutArchive::MoveBasePosition(UInt64 distanceToMove)
{
m_BasePosition += distanceToMove; // test overflow
}
void COutArchive::PrepareWriteCompressedDataZip64(UInt16 fileNameLength, bool isZip64, bool aesEncryption)
{
m_IsZip64 = isZip64;
m_ExtraSize = isZip64 ? (4 + 8 + 8) : 0;
if (aesEncryption)
m_ExtraSize += 4 + 7;
m_LocalFileHeaderSize = 4 + NFileHeader::kLocalBlockSize + fileNameLength + m_ExtraSize;
}
void COutArchive::PrepareWriteCompressedData(UInt16 fileNameLength, UInt64 unPackSize, bool aesEncryption)
{
// We test it to 0xF8000000 to support case when compressed size
// can be larger than uncompressed size.
PrepareWriteCompressedDataZip64(fileNameLength, unPackSize >= 0xF8000000, aesEncryption);
}
void COutArchive::PrepareWriteCompressedData2(UInt16 fileNameLength, UInt64 unPackSize, UInt64 packSize, bool aesEncryption)
{
bool isUnPack64 = unPackSize >= 0xFFFFFFFF;
bool isPack64 = packSize >= 0xFFFFFFFF;
bool isZip64 = isPack64 || isUnPack64;
PrepareWriteCompressedDataZip64(fileNameLength, isZip64, aesEncryption);
}
void COutArchive::WriteBytes(const void *buffer, UInt32 size)
{
m_OutBuffer.WriteBytes(buffer, size);
m_BasePosition += size;
}
void COutArchive::WriteByte(Byte b)
{
WriteBytes(&b, 1);
}
void COutArchive::WriteUInt16(UInt16 value)
{
for (int i = 0; i < 2; i++)
{
WriteByte((Byte)value);
value >>= 8;
}
}
void COutArchive::WriteUInt32(UInt32 value)
{
for (int i = 0; i < 4; i++)
{
WriteByte((Byte)value);
value >>= 8;
}
}
void COutArchive::WriteUInt64(UInt64 value)
{
for (int i = 0; i < 8; i++)
{
WriteByte((Byte)value);
value >>= 8;
}
}
void COutArchive::WriteExtra(const CExtraBlock &extra)
{
if (extra.SubBlocks.Size() != 0)
{
for (int i = 0; i < extra.SubBlocks.Size(); i++)
{
const CExtraSubBlock &subBlock = extra.SubBlocks[i];
WriteUInt16(subBlock.ID);
WriteUInt16((UInt16)subBlock.Data.GetCapacity());
WriteBytes(subBlock.Data, (UInt32)subBlock.Data.GetCapacity());
}
}
}
void COutArchive::SeekTo(UInt64 offset)
{
HRESULT res = m_Stream->Seek(offset, STREAM_SEEK_SET, NULL);
if (res != S_OK)
throw CSystemException(res);
}
void COutArchive::WriteLocalHeader(const CLocalItem &item)
{
SeekTo(m_BasePosition);
bool isZip64 = m_IsZip64 || item.PackSize >= 0xFFFFFFFF || item.UnPackSize >= 0xFFFFFFFF;
WriteUInt32(NSignature::kLocalFileHeader);
{
Byte ver = item.ExtractVersion.Version;
if (isZip64 && ver < NFileHeader::NCompressionMethod::kExtractVersion_Zip64)
ver = NFileHeader::NCompressionMethod::kExtractVersion_Zip64;
WriteByte(ver);
}
WriteByte(item.ExtractVersion.HostOS);
WriteUInt16(item.Flags);
WriteUInt16(item.CompressionMethod);
WriteUInt32(item.Time);
WriteUInt32(item.FileCRC);
WriteUInt32(isZip64 ? 0xFFFFFFFF: (UInt32)item.PackSize);
WriteUInt32(isZip64 ? 0xFFFFFFFF: (UInt32)item.UnPackSize);
WriteUInt16((UInt16)item.Name.Length());
{
UInt16 localExtraSize = (UInt16)((isZip64 ? (4 + 16): 0) + item.LocalExtra.GetSize());
if (localExtraSize > m_ExtraSize)
throw CSystemException(E_FAIL);
}
WriteUInt16((UInt16)m_ExtraSize); // test it;
WriteBytes((const char *)item.Name, item.Name.Length());
UInt32 extraPos = 0;
if (isZip64)
{
extraPos += 4 + 16;
WriteUInt16(NFileHeader::NExtraID::kZip64);
WriteUInt16(16);
WriteUInt64(item.UnPackSize);
WriteUInt64(item.PackSize);
}
WriteExtra(item.LocalExtra);
extraPos += (UInt32)item.LocalExtra.GetSize();
for (; extraPos < m_ExtraSize; extraPos++)
WriteByte(0);
m_OutBuffer.FlushWithCheck();
MoveBasePosition(item.PackSize);
SeekTo(m_BasePosition);
}
void COutArchive::WriteCentralHeader(const CItem &item)
{
bool isUnPack64 = item.UnPackSize >= 0xFFFFFFFF;
bool isPack64 = item.PackSize >= 0xFFFFFFFF;
bool isPosition64 = item.LocalHeaderPosition >= 0xFFFFFFFF;
bool isZip64 = isPack64 || isUnPack64 || isPosition64;
WriteUInt32(NSignature::kCentralFileHeader);
WriteByte(item.MadeByVersion.Version);
WriteByte(item.MadeByVersion.HostOS);
{
Byte ver = item.ExtractVersion.Version;
if (isZip64 && ver < NFileHeader::NCompressionMethod::kExtractVersion_Zip64)
ver = NFileHeader::NCompressionMethod::kExtractVersion_Zip64;
WriteByte(ver);
}
WriteByte(item.ExtractVersion.HostOS);
WriteUInt16(item.Flags);
WriteUInt16(item.CompressionMethod);
WriteUInt32(item.Time);
WriteUInt32(item.FileCRC);
WriteUInt32(isPack64 ? 0xFFFFFFFF: (UInt32)item.PackSize);
WriteUInt32(isUnPack64 ? 0xFFFFFFFF: (UInt32)item.UnPackSize);
WriteUInt16((UInt16)item.Name.Length());
UInt16 zip64ExtraSize = (UInt16)((isUnPack64 ? 8: 0) + (isPack64 ? 8: 0) + (isPosition64 ? 8: 0));
const UInt16 kNtfsExtraSize = 4 + 2 + 2 + (3 * 8);
UInt16 centralExtraSize = (UInt16)(isZip64 ? (4 + zip64ExtraSize) : 0) + (item.NtfsTimeIsDefined ? (4 + kNtfsExtraSize) : 0);
centralExtraSize = (UInt16)(centralExtraSize + item.CentralExtra.GetSize());
WriteUInt16(centralExtraSize); // test it;
WriteUInt16((UInt16)item.Comment.GetCapacity());
WriteUInt16(0); // DiskNumberStart;
WriteUInt16(item.InternalAttributes);
WriteUInt32(item.ExternalAttributes);
WriteUInt32(isPosition64 ? 0xFFFFFFFF: (UInt32)item.LocalHeaderPosition);
WriteBytes((const char *)item.Name, item.Name.Length());
if (isZip64)
{
WriteUInt16(NFileHeader::NExtraID::kZip64);
WriteUInt16(zip64ExtraSize);
if(isUnPack64)
WriteUInt64(item.UnPackSize);
if(isPack64)
WriteUInt64(item.PackSize);
if(isPosition64)
WriteUInt64(item.LocalHeaderPosition);
}
if (item.NtfsTimeIsDefined)
{
WriteUInt16(NFileHeader::NExtraID::kNTFS);
WriteUInt16(kNtfsExtraSize);
WriteUInt32(0); // reserved
WriteUInt16(NFileHeader::NNtfsExtra::kTagTime);
WriteUInt16(8 * 3);
WriteUInt32(item.NtfsMTime.dwLowDateTime);
WriteUInt32(item.NtfsMTime.dwHighDateTime);
WriteUInt32(item.NtfsATime.dwLowDateTime);
WriteUInt32(item.NtfsATime.dwHighDateTime);
WriteUInt32(item.NtfsCTime.dwLowDateTime);
WriteUInt32(item.NtfsCTime.dwHighDateTime);
}
WriteExtra(item.CentralExtra);
if (item.Comment.GetCapacity() > 0)
WriteBytes(item.Comment, (UInt32)item.Comment.GetCapacity());
}
void COutArchive::WriteCentralDir(const CObjectVector<CItem> &items, const CByteBuffer *comment)
{
SeekTo(m_BasePosition);
UInt64 cdOffset = GetCurrentPosition();
for(int i = 0; i < items.Size(); i++)
WriteCentralHeader(items[i]);
UInt64 cd64EndOffset = GetCurrentPosition();
UInt64 cdSize = cd64EndOffset - cdOffset;
bool cdOffset64 = cdOffset >= 0xFFFFFFFF;
bool cdSize64 = cdSize >= 0xFFFFFFFF;
bool items64 = items.Size() >= 0xFFFF;
bool isZip64 = (cdOffset64 || cdSize64 || items64);
if (isZip64)
{
WriteUInt32(NSignature::kZip64EndOfCentralDir);
WriteUInt64(kZip64EcdSize); // ThisDiskNumber = 0;
WriteUInt16(45); // version
WriteUInt16(45); // version
WriteUInt32(0); // ThisDiskNumber = 0;
WriteUInt32(0); // StartCentralDirectoryDiskNumber;;
WriteUInt64((UInt64)items.Size());
WriteUInt64((UInt64)items.Size());
WriteUInt64((UInt64)cdSize);
WriteUInt64((UInt64)cdOffset);
WriteUInt32(NSignature::kZip64EndOfCentralDirLocator);
WriteUInt32(0); // number of the disk with the start of the zip64 end of central directory
WriteUInt64(cd64EndOffset);
WriteUInt32(1); // total number of disks
}
WriteUInt32(NSignature::kEndOfCentralDir);
WriteUInt16(0); // ThisDiskNumber = 0;
WriteUInt16(0); // StartCentralDirectoryDiskNumber;
WriteUInt16((UInt16)(items64 ? 0xFFFF: items.Size()));
WriteUInt16((UInt16)(items64 ? 0xFFFF: items.Size()));
WriteUInt32(cdSize64 ? 0xFFFFFFFF: (UInt32)cdSize);
WriteUInt32(cdOffset64 ? 0xFFFFFFFF: (UInt32)cdOffset);
UInt32 commentSize = (UInt32)(comment ? comment->GetCapacity() : 0);
WriteUInt16((UInt16)commentSize);
if (commentSize > 0)
WriteBytes((const Byte *)*comment, commentSize);
m_OutBuffer.FlushWithCheck();
}
void COutArchive::CreateStreamForCompressing(IOutStream **outStream)
{
COffsetOutStream *streamSpec = new COffsetOutStream;
CMyComPtr<IOutStream> tempStream(streamSpec);
streamSpec->Init(m_Stream, m_BasePosition + m_LocalFileHeaderSize);
*outStream = tempStream.Detach();
}
void COutArchive::SeekToPackedDataPosition()
{
SeekTo(m_BasePosition + m_LocalFileHeaderSize);
}
void COutArchive::CreateStreamForCopying(ISequentialOutStream **outStream)
{
CMyComPtr<ISequentialOutStream> tempStream(m_Stream);
*outStream = tempStream.Detach();
}
}}
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