Managed C++ wrapper for ZLib

/*
http://www.developdotnet.com

File Created by: Alberto Ferrazzoli
Date: 06/06/2004

File Description:
Zip file format structure headers. See PKWare appnote.txt

Notes:

Revision Log - Please mark significant changes in source code in the following format:

Date  -  Time -  Reviewer  -			Comments
08/07/2004		 Alberto Ferrazzoli		Added Write methods
26/10/2004		 Alberto Ferrazzoli		Now Read functions, can skip signature constant

*/

#pragma once

using namespace System;
using namespace System::Collections;
using namespace System::IO;
using namespace System::Text;
using namespace System::Runtime::InteropServices;

namespace DevelopDotNet
{
	namespace Compression
	{
		public __gc class ZipEntry;

		//////////////////////////////////////////////////////////////////////////
		// LocalFileHeader
		// 
		private __gc class LocalFileHeader
		{
		private public:
			static const UInt32 LOCALHEADERMAGIC = 0x04034b50;

		private public:
			UInt32 Signature;
			UInt16 VersionNeeded;
			UInt16 Flags;
			UInt16 CompressionMethod;
			UInt16 LastModFileTime;
			UInt16 LastModFileDate;
			UInt32 CRC32;
			UInt32 CompressedSize;
			UInt32 UncompressedSize;
			String* FileName;			
			System::Byte ExtraField __gc[];

			__property int get_LocalHeaderSize();

		private public:
			LocalFileHeader();

			static bool HasValidSignature(Stream* stream);

			void Read(Stream* stream);
			void Read(Stream* stream, bool signature);
			void Read(BinaryReader* stream, bool signature);
			void Write(Stream* stream);
		};

		private __gc class DataDescriptor
		{
		private public:
			UInt32 CRC32;
			UInt32 CompressedSize;
			UInt32 UncompressedSize;

			__property int get_DataDescriptorSize();

			void Read(Stream* stream);
			void Write(Stream* stream);
		};

		//////////////////////////////////////////////////////////////////////////
		// CentralFileHeader
		// 
		private __gc class CentralFileHeader : public IComparable
		{
		private public:
			static const UInt32 CENTRALHEADERMAGIC = 0x02014b50;

		private public:
			UInt32 Signature;
			UInt16 VersionMadeby;
			UInt16 VersionNeeded;
			UInt16 Flags;
			UInt16 CompressionMethod;
			UInt16 LastModFileTime;
			UInt16 LastModFileDate;
			UInt32 CRC32;
			UInt32 CompressedSize;
			UInt32 UncompressedSize;
			UInt16 DiskNumberStart;
			UInt16 InternalFileAttributes;
			UInt32 ExternalFileAttributes;
			UInt32 OffsetLocalHeader;

			String* FileName;
			System::Byte ExtraField __gc[];
			String* FileComment;

			String* FullPath;

			__property int get_CentralHeaderSize();
			__property ZipEntry* get_Entry() { return _entry; }
			__property void set_Entry(ZipEntry* value) { _entry = value; }

		public:
			CentralFileHeader();
			CentralFileHeader(ZipEntry* entry);

			Int32 CompareTo(Object* obj);
			void Read(Stream* stream);
			void Read(Stream* stream, bool signature);
			void Read(BinaryReader* reader, bool signature);
			void Write(Stream* stream);

		private:
			ZipEntry* _entry;
		};

		//////////////////////////////////////////////////////////////////////////
		// EndOfCentralDirectory
		// 
		private __gc class EndOfCentralDirectory
		{
		private public:
			static const UInt32 ENDHEADERMAGIC = 0x06054b50;

		private public:
			UInt32 Signature;
			UInt16 DiskNumber;
			UInt16 DiskNumberStartCD;
			UInt16 ThisDiskEntriesCD;
			UInt16 TotalEntriesCD;

			// size of central directory
			UInt32 SizeCD;

			// offset of start of central directory with respect to the starting disk number
			UInt32 OffsetCD;
			
			// zip file comment
			String* ArchiveComment;

		private public:
			EndOfCentralDirectory();

			void Read(Stream* stream);
			void Read(Stream* stream, bool signature);
			void Read(BinaryReader* reader, bool signature);
			void Write(Stream* stream);
		};
	}
}