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// NsisIn.h
#ifndef __ARCHIVE_NSIS_IN_H
#define __ARCHIVE_NSIS_IN_H
#include "Common/Buffer.h"
#include "Common/MyCom.h"
#include "Common/StringConvert.h"
#include "NsisDecode.h"
// #define NSIS_SCRIPT
namespace NArchive {
namespace NNsis {
const int kSignatureSize = 16;
#define NSIS_SIGNATURE { 0xEF, 0xBE, 0xAD, 0xDE, 0x4E, 0x75, 0x6C, 0x6C, 0x73, 0x6F, 0x66, 0x74, 0x49, 0x6E, 0x73, 0x74}
extern Byte kSignature[kSignatureSize];
const UInt32 kFlagsMask = 0xF;
namespace NFlags
{
const UInt32 kUninstall = 1;
const UInt32 kSilent = 2;
const UInt32 kNoCrc = 4;
const UInt32 kForceCrc = 8;
}
struct CFirstHeader
{
UInt32 Flags;
UInt32 HeaderLength;
UInt32 ArchiveSize;
bool ThereIsCrc() const
{
if ((Flags & NFlags::kForceCrc ) != 0)
return true;
return ((Flags & NFlags::kNoCrc) == 0);
}
UInt32 GetDataSize() const { return ArchiveSize - (ThereIsCrc() ? 4 : 0); }
};
struct CBlockHeader
{
UInt32 Offset;
UInt32 Num;
};
struct CItem
{
AString PrefixA;
UString PrefixU;
AString NameA;
UString NameU;
FILETIME MTime;
bool IsUnicode;
bool UseFilter;
bool IsCompressed;
bool SizeIsDefined;
bool CompressedSizeIsDefined;
bool EstimatedSizeIsDefined;
UInt32 Pos;
UInt32 Size;
UInt32 CompressedSize;
UInt32 EstimatedSize;
UInt32 DictionarySize;
CItem(): IsUnicode(false), UseFilter(false), IsCompressed(true), SizeIsDefined(false),
CompressedSizeIsDefined(false), EstimatedSizeIsDefined(false), Size(0), DictionarySize(1) {}
bool IsINSTDIR() const
{
return (PrefixA.Length() >= 3 || PrefixU.Length() >= 3);
}
UString GetReducedName(bool unicode) const
{
UString s;
if (unicode)
s = PrefixU;
else
s = MultiByteToUnicodeString(PrefixA);
if (s.Length() > 0)
if (s[s.Length() - 1] != L'\\')
s += L'\\';
if (unicode)
s += NameU;
else
s += MultiByteToUnicodeString(NameA);
const int len = 9;
if (s.Left(len).CompareNoCase(L"$INSTDIR\\") == 0)
s = s.Mid(len);
return s;
}
};
class CInArchive
{
UInt64 _archiveSize;
CMyComPtr<IInStream> _stream;
Byte ReadByte();
UInt32 ReadUInt32();
HRESULT Open2(
DECL_EXTERNAL_CODECS_LOC_VARS2
);
void ReadBlockHeader(CBlockHeader &bh);
AString ReadStringA(UInt32 pos) const;
UString ReadStringU(UInt32 pos) const;
AString ReadString2A(UInt32 pos) const;
UString ReadString2U(UInt32 pos) const;
AString ReadString2(UInt32 pos) const;
AString ReadString2Qw(UInt32 pos) const;
HRESULT ReadEntries(const CBlockHeader &bh);
HRESULT Parse();
CByteBuffer _data;
UInt64 _size;
size_t _posInData;
UInt32 _stringsPos;
bool _headerIsCompressed;
UInt32 _nonSolidStartOffset;
public:
HRESULT Open(
DECL_EXTERNAL_CODECS_LOC_VARS
IInStream *inStream, const UInt64 *maxCheckStartPosition);
void Clear();
UInt64 StreamOffset;
CDecoder Decoder;
CObjectVector<CItem> Items;
CFirstHeader FirstHeader;
NMethodType::EEnum Method;
UInt32 DictionarySize;
bool IsSolid;
bool UseFilter;
bool FilterFlag;
bool IsUnicode;
#ifdef NSIS_SCRIPT
AString Script;
#endif
UInt32 GetOffset() const { return IsSolid ? 4 : 0; }
UInt64 GetDataPos(int index)
{
const CItem &item = Items[index];
return GetOffset() + FirstHeader.HeaderLength + item.Pos;
}
UInt64 GetPosOfSolidItem(int index) const
{
const CItem &item = Items[index];
return 4 + FirstHeader.HeaderLength + item.Pos;
}
UInt64 GetPosOfNonSolidItem(int index) const
{
const CItem &item = Items[index];
return StreamOffset + _nonSolidStartOffset + 4 + item.Pos;
}
void Release()
{
Decoder.Release();
}
};
}}
#endif
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