mirror of
https://github.com/Xevion/easy7zip.git
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167 lines
3.1 KiB
C++
Executable File
167 lines
3.1 KiB
C++
Executable File
// Archive/NsisIn.h
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#ifndef __ARCHIVE_ISO_IN_H
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#define __ARCHIVE_ISO_IN_H
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#include "Common/MyCom.h"
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#include "Common/IntToString.h"
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#include "Common/Buffer.h"
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#include "../../IStream.h"
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#include "NsisDecode.h"
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// #define NSIS_SCRIPT
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namespace NArchive {
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namespace NNsis {
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const int kSignatureSize = 16;
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extern Byte kSignature[kSignatureSize];
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const UInt32 kFlagsMask = 0xF;
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namespace NFlags
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{
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const UInt32 kUninstall = 1;
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const UInt32 kSilent = 2;
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const UInt32 kNoCrc = 4;
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const UInt32 kForceCrc = 8;
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}
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struct CFirstHeader
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{
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UInt32 Flags;
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UInt32 HeaderLength;
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UInt32 ArchiveSize;
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bool ThereIsCrc() const
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{
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if ((Flags & NFlags::kForceCrc ) != 0)
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return true;
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return ((Flags & NFlags::kNoCrc) == 0);
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}
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UInt32 GetDataSize() const { return ArchiveSize - (ThereIsCrc() ? 4 : 0); }
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};
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struct CBlockHeader
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{
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UInt32 Offset;
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UInt32 Num;
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};
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struct CItem
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{
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AString Prefix;
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AString Name;
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UInt32 Pos;
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bool SizeIsDefined;
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bool CompressedSizeIsDefined;
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bool EstimatedSizeIsDefined;
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UInt32 Size;
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UInt32 CompressedSize;
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UInt32 EstimatedSize;
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FILETIME DateTime;
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UInt32 DictionarySize;
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bool IsCompressed;
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bool UseFilter;
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CItem(): UseFilter(false), SizeIsDefined(false), EstimatedSizeIsDefined(false),
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IsCompressed(true), CompressedSizeIsDefined(false), Size(0) {}
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bool IsINSTDIR() const
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{
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if (Prefix.Length() < 3)
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return false;
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return true;
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}
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AString GetReducedName() const
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{
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AString prefix = Prefix;
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if (prefix.Length() > 0)
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if (prefix[prefix.Length() - 1] != '\\')
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prefix += '\\';
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AString s2 = prefix + Name;
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const int len = 9;
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if (s2.Left(len).CompareNoCase("$INSTDIR\\") == 0)
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s2 = s2.Mid(len);
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return s2;
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}
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};
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class CInArchive
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{
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UInt64 _archiveSize;
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CMyComPtr<IInStream> _stream;
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Byte ReadByte();
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UInt32 ReadUInt32();
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HRESULT Open2();
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void ReadBlockHeader(CBlockHeader &bh);
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AString ReadString(UInt32 pos);
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AString ReadString2(UInt32 pos);
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HRESULT ReadEntries(const CBlockHeader &bh);
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HRESULT Parse();
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CByteBuffer _data;
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UInt64 _size;
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size_t _posInData;
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UInt32 _stringsPos;
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bool _headerIsCompressed;
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UInt32 _nonSolidStartOffset;
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public:
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HRESULT Open(IInStream *inStream, const UInt64 *maxCheckStartPosition);
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void Clear();
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UInt64 StreamOffset;
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CDecoder Decoder;
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CObjectVector<CItem> Items;
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bool IsSolid;
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CFirstHeader FirstHeader;
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NMethodType::EEnum Method;
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bool UseFilter;
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UInt32 DictionarySize;
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bool FilterFlag;
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#ifdef NSIS_SCRIPT
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AString Script;
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#endif
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UInt32 GetOffset() const { return IsSolid ? 4 : 0; }
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UInt64 GetDataPos(int index)
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{
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const CItem &item = Items[index];
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return GetOffset() + FirstHeader.HeaderLength + item.Pos;
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}
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UInt64 GetPosOfSolidItem(int index) const
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{
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const CItem &item = Items[index];
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return 4 + FirstHeader.HeaderLength + item.Pos;
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}
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UInt64 GetPosOfNonSolidItem(int index) const
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{
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const CItem &item = Items[index];
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return StreamOffset + _nonSolidStartOffset + 4 + item.Pos;
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}
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void Release()
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{
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Decoder.Release();
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}
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};
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UInt32 GetUInt32FromMemLE(const Byte *p);
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}}
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#endif
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