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source: trunk/sources/HeuristicLab.ExtLibs/HeuristicLab.EPPlus/4.0.3/EPPlus-4.0.3/Utils/CompoundDocument.cs @ 13329

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Last change on this file since 13329 was 12074, checked in by sraggl, 10 years ago
#2341: Added EPPlus-4.0.3 to ExtLibs
File size: 28.5 KB

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[12074]	1	/*******************************************************************************
	2	* You may amend and distribute as you like, but don't remove this header!
	3	*
	4	* EPPlus provides server-side generation of Excel 2007/2010 spreadsheets.
	5	* See http://www.codeplex.com/EPPlus for details.
	6	*
	7	* Copyright (C) 2011 Jan Källman
	8	*
	9	* This library is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU Lesser General Public
	11	* License as published by the Free Software Foundation; either
	12	* version 2.1 of the License, or (at your option) any later version.
	13
	14	* This library is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	17	* See the GNU Lesser General Public License for more details.
	18	*
	19	* The GNU Lesser General Public License can be viewed at http://www.opensource.org/licenses/lgpl-license.php
	20	* If you unfamiliar with this license or have questions about it, here is an http://www.gnu.org/licenses/gpl-faq.html
	21	*
	22	* All code and executables are provided "as is" with no warranty either express or implied.
	23	* The author accepts no liability for any damage or loss of business that this product may cause.
	24	*
	25	* Code change notes:
	26	*
	27	* Author Change Date
	28	*******************************************************************************
	29	* Jan Källman Added 01-01-2012
	30	* Jan Källman Added compression support 27-03-2012
	31	*******************************************************************************/
	32	using System;
	33	using System.Collections.Generic;
	34	using System.Linq;
	35	using System.Text;
	36	using System.Runtime.InteropServices;
	37	using comTypes = System.Runtime.InteropServices.ComTypes;
	38	using System.IO;
	39	using System.Security;
	40
	41	namespace OfficeOpenXml.Utils
	42	{
	43	#if !MONO
	44	internal class CompoundDocument
	45	{
	46	internal class StoragePart
	47	{
	48	public StoragePart()
	49	{
	50
	51	}
	52	internal Dictionary<string, StoragePart> SubStorage = new Dictionary<string, StoragePart>();
	53	internal Dictionary<string, byte[]> DataStreams = new Dictionary<string, byte[]>();
	54	}
	55	internal StoragePart Storage = null;
	56	internal CompoundDocument()
	57	{
	58	Storage = new CompoundDocument.StoragePart();
	59	}
	60	internal CompoundDocument(FileInfo fi)
	61	{
	62	Read(fi);
	63	}
	64	internal CompoundDocument(ILockBytes lb)
	65	{
	66	Read(lb);
	67	}
	68	internal CompoundDocument(byte[] doc)
	69	{
	70	Read(doc);
	71	}
	72	internal void Read(FileInfo fi)
	73	{
	74	var b = File.ReadAllBytes(fi.FullName);
	75	Read(b);
	76	}
	77	[SecuritySafeCritical]
	78	internal void Read(byte[] doc)
	79	{
	80	ILockBytes lb;
	81	var iret = CreateILockBytesOnHGlobal(IntPtr.Zero, true, out lb);
	82
	83	IntPtr buffer = Marshal.AllocHGlobal(doc.Length);
	84	Marshal.Copy(doc, 0, buffer, doc.Length);
	85	UIntPtr readSize;
	86	lb.WriteAt(0, buffer, doc.Length, out readSize);
	87	Marshal.FreeHGlobal(buffer);
	88
	89	Read(lb);
	90	}
	91
	92	[SecuritySafeCritical]
	93	internal void Read(ILockBytes lb)
	94	{
	95	if (StgIsStorageILockBytes(lb) == 0)
	96	{
	97	IStorage storage = null;
	98	if (StgOpenStorageOnILockBytes(
	99	lb,
	100	null,
	101	STGM.DIRECT \| STGM.READ \| STGM.SHARE_EXCLUSIVE,
	102	IntPtr.Zero,
	103	0,
	104	out storage) == 0)
	105	{
	106	Storage = new StoragePart();
	107	ReadParts(storage, Storage);
	108	Marshal.ReleaseComObject(storage);
	109	}
	110	}
	111	else
	112	{
	113	throw (new InvalidDataException(string.Format("Part is not a compound document")));
	114	}
	115	}
	116	#region Compression
	117	/// <summary>
	118	/// Compression using a run length encoding algorithm.
	119	/// See MS-OVBA Section 2.4
	120	/// </summary>
	121	/// <param name="part">Byte array to decompress</param>
	122	/// <returns></returns>
	123	internal static byte[] CompressPart(byte[] part)
	124	{
	125	MemoryStream ms = new MemoryStream(4096);
	126	BinaryWriter br = new BinaryWriter(ms);
	127	br.Write((byte)1);
	128
	129	int compStart = 1;
	130	int compEnd = 4098;
	131	int decompStart = 0;
	132	int decompEnd = part.Length < 4096 ? part.Length : 4096;
	133
	134	while (decompStart < decompEnd && compStart < compEnd)
	135	{
	136	byte[] chunk = CompressChunk(part, ref decompStart);
	137	ushort header;
	138	if (chunk == null \|\| chunk.Length == 0)
	139	{
	140	header = 4096 \| 0x600; //B=011 A=0
	141	}
	142	else
	143	{
	144	header = (ushort)(((chunk.Length - 1) & 0xFFF));
	145	header \|= 0xB000; //B=011 A=1
	146	br.Write(header);
	147	br.Write(chunk);
	148	}
	149	decompEnd = part.Length < decompStart + 4096 ? part.Length : decompStart+4096;
	150	}
	151
	152
	153	br.Flush();
	154	return ms.ToArray();
	155	}
	156	private static byte[] CompressChunk(byte[] buffer, ref int startPos)
	157	{
	158	var comprBuffer=new byte[4096];
	159	int flagPos = 0;
	160	int cPos=1;
	161	int dPos = startPos;
	162	int dEnd=startPos+4096 < buffer.Length? startPos+4096 : buffer.Length;
	163	while(dPos<dEnd)
	164	{
	165	byte tokenFlags = 0;
	166	for (int i = 0; i < 8; i++)
	167	{
	168	if (dPos - startPos > 0)
	169	{
	170	int bestCandidate = -1;
	171	int bestLength = 0;
	172	int candidate = dPos - 1;
	173	int bitCount = GetLengthBits(dPos-startPos);
	174	int bits = (16 - bitCount);
	175	ushort lengthMask = (ushort)((0xFFFF) >> bits);
	176
	177	while (candidate >= startPos)
	178	{
	179	if (buffer[candidate] == buffer[dPos])
	180	{
	181	int length = 1;
	182
	183	while (buffer.Length > dPos + length && buffer[candidate + length] == buffer[dPos + length] && length < lengthMask && dPos+length < dEnd)
	184	{
	185	length++;
	186	}
	187	if (length > bestLength)
	188	{
	189	bestCandidate = candidate;
	190	bestLength = length;
	191	if (bestLength == lengthMask)
	192	{
	193	break;
	194	}
	195	}
	196	}
	197	candidate--;
	198	}
	199	if (bestLength >= 3) //Copy token
	200	{
	201	tokenFlags \|= (byte)(1 << i);
	202
	203	UInt16 offsetMask = (ushort)~lengthMask;
	204	ushort token = (ushort)(((ushort)(dPos - (bestCandidate+1))) << (bitCount) \| (ushort)(bestLength - 3));
	205	Array.Copy(BitConverter.GetBytes(token), 0, comprBuffer, cPos, 2);
	206	dPos = dPos + bestLength;
	207	cPos += 2;
	208	//SetCopy Token
	209	}
	210	else
	211	{
	212	comprBuffer[cPos++] = buffer[dPos++];
	213	}
	214	}
	215
	216	else
	217	{
	218	comprBuffer[cPos++] = buffer[dPos++];
	219	}
	220	if (dPos >= dEnd) break;
	221	}
	222	comprBuffer[flagPos] = tokenFlags;
	223	flagPos = cPos++;
	224	}
	225	var ret = new byte[cPos - 1];
	226	Array.Copy(comprBuffer, ret, ret.Length);
	227	startPos = dEnd;
	228	return ret;
	229	}
	230	internal static byte[] DecompressPart(byte[] part)
	231	{
	232	return DecompressPart(part, 0);
	233	}
	234	/// <summary>
	235	/// Decompression using a run length encoding algorithm.
	236	/// See MS-OVBA Section 2.4
	237	/// </summary>
	238	/// <param name="part">Byte array to decompress</param>
	239	/// <param name="startPos"></param>
	240	/// <returns></returns>
	241	internal static byte[] DecompressPart(byte[] part, int startPos)
	242	{
	243
	244	if (part[startPos] != 1)
	245	{
	246	return null;
	247	}
	248	MemoryStream ms = new MemoryStream(4096);
	249	int compressPos = startPos + 1;
	250	while(compressPos < part.Length-1)
	251	{
	252	DecompressChunk(ms, part, ref compressPos);
	253	}
	254	return ms.ToArray();
	255	}
	256	private static void DecompressChunk(MemoryStream ms, byte[] compBuffer, ref int pos)
	257	{
	258	ushort header = BitConverter.ToUInt16(compBuffer, pos);
	259	int decomprPos=0;
	260	byte[] buffer = new byte[4198]; //Add an extra 100 byte. Some workbooks have overflowing worksheets.
	261	int size = (int)(header & 0xFFF)+3;
	262	int endPos = pos+size;
	263	int a = (int)(header & 0x7000) >> 12;
	264	int b = (int)(header & 0x8000) >> 15;
	265	pos += 2;
	266	if (b == 1) //Compressed chunk
	267	{
	268	while (pos < compBuffer.Length && pos < endPos)
	269	{
	270	//Decompress token
	271	byte token = compBuffer[pos++];
	272	if (pos >= endPos)
	273	break;
	274	for (int i = 0; i < 8; i++)
	275	{
	276	//Literal token
	277	if ((token & (1 << i)) == 0)
	278	{
	279	ms.WriteByte(compBuffer[pos]);
	280	buffer[decomprPos++] = compBuffer[pos++];
	281	}
	282	else //copy token
	283	{
	284	var t = BitConverter.ToUInt16(compBuffer, pos);
	285	int bitCount = GetLengthBits(decomprPos);
	286	int bits = (16 - bitCount);
	287	ushort lengthMask = (ushort)((0xFFFF) >> bits);
	288	UInt16 offsetMask = (ushort)~lengthMask;
	289	var length = (lengthMask & t) + 3;
	290	var offset = (offsetMask & t) >> (bitCount);
	291	int source = decomprPos - offset - 1;
	292	if (decomprPos + length >= buffer.Length)
	293	{
	294	// Be lenient on decompression, so extend our decompression
	295	// buffer. Excel generated VBA projects do encounter this issue.
	296	// One would think (not surprisingly that the VBA project spec)
	297	// over emphasizes the size restrictions of a DecompressionChunk.
	298	var largerBuffer = new byte[buffer.Length + 4098];
	299	Array.Copy(buffer, largerBuffer, decomprPos);
	300	buffer = largerBuffer;
	301	}
	302
	303	// Even though we've written to the MemoryStream,
	304	// We still should decompress the token into this buffer
	305	// in case a later token needs to use the bytes we're
	306	// about to decompress.
	307	for (int c = 0; c < length; c++)
	308	{
	309	ms.WriteByte(buffer[source]); //Must copy byte-wise because copytokens can overlap compressed buffer.
	310	buffer[decomprPos++] = buffer[source++];
	311	}
	312
	313	pos += 2;
	314
	315	}
	316	if (pos >= endPos)
	317	break;
	318	}
	319	}
	320	return;
	321	}
	322	else //Raw chunk
	323	{
	324	ms.Write(compBuffer, pos, size);
	325	pos += size;
	326	return;
	327	}
	328	}
	329	private static int GetLengthBits(int decompPos)
	330	{
	331	if (decompPos <= 16)
	332	{
	333	return 12;
	334	}
	335	else if (decompPos <= 32)
	336	{
	337	return 11;
	338	}
	339	else if (decompPos <= 64)
	340	{
	341	return 10;
	342	}
	343	else if (decompPos <= 128)
	344	{
	345	return 9;
	346	}
	347	else if (decompPos <= 256)
	348	{
	349	return 8;
	350	}
	351	else if (decompPos <= 512)
	352	{
	353	return 7;
	354	}
	355	else if (decompPos <= 1024)
	356	{
	357	return 6;
	358	}
	359	else if (decompPos <= 2048)
	360	{
	361	return 5;
	362	}
	363	else if (decompPos <= 4096)
	364	{
	365	return 4;
	366	}
	367	else
	368	{
	369	//We should never end up here, but if so this is the formula to calculate the bits...
	370	return 12 - (int)Math.Truncate(Math.Log(decompPos - 1 >> 4, 2) + 1);
	371	}
	372	}
	373	#endregion
	374	#region "API declare"
	375	[ComImport]
	376	[Guid("0000000d-0000-0000-C000-000000000046")]
	377	[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
	378	internal interface IEnumSTATSTG
	379	{
	380	// The user needs to allocate an STATSTG array whose size is celt.
	381	[PreserveSig]
	382	uint Next(
	383	uint celt,
	384	[MarshalAs(UnmanagedType.LPArray), Out]
	385	System.Runtime.InteropServices.ComTypes.STATSTG[] rgelt,
	386	out uint pceltFetched
	387	);
	388
	389	void Skip(uint celt);
	390
	391	void Reset();
	392
	393	[return: MarshalAs(UnmanagedType.Interface)]
	394	IEnumSTATSTG Clone();
	395	}
	396
	397	[ComImport]
	398	[Guid("0000000b-0000-0000-C000-000000000046")]
	399	[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
	400	interface IStorage
	401	{
	402	void CreateStream(
	403	/* [string][in] */ string pwcsName,
	404	/* [in] */ uint grfMode,
	405	/* [in] */ uint reserved1,
	406	/* [in] */ uint reserved2,
	407	/* [out] */ out comTypes.IStream ppstm);
	408
	409	void OpenStream(
	410	/* [string][in] */ string pwcsName,
	411	/* [unique][in] */ IntPtr reserved1,
	412	/* [in] */ uint grfMode,
	413	/* [in] */ uint reserved2,
	414	/* [out] */ out comTypes.IStream ppstm);
	415
	416	void CreateStorage(
	417	/* [string][in] */ string pwcsName,
	418	/* [in] */ uint grfMode,
	419	/* [in] */ uint reserved1,
	420	/* [in] */ uint reserved2,
	421	/* [out] */ out IStorage ppstg);
	422
	423	void OpenStorage(
	424	/* [string][unique][in] */ string pwcsName,
	425	/* [unique][in] */ IStorage pstgPriority,
	426	/* [in] */ STGM grfMode,
	427	/* [unique][in] */ IntPtr snbExclude,
	428	/* [in] */ uint reserved,
	429	/* [out] */ out IStorage ppstg);
	430
	431	void CopyTo(
	432	[InAttribute] uint ciidExclude,
	433	[InAttribute] Guid[] rgiidExclude,
	434	[InAttribute] IntPtr snbExclude,
	435	[InAttribute] IStorage pstgDest
	436	);
	437
	438	void MoveElementTo(
	439	/* [string][in] */ string pwcsName,
	440	/* [unique][in] */ IStorage pstgDest,
	441	/* [string][in] */ string pwcsNewName,
	442	/* [in] */ uint grfFlags);
	443
	444	void Commit(
	445	/* [in] */ uint grfCommitFlags);
	446
	447	void Revert();
	448
	449	void EnumElements(
	450	/* [in] */ uint reserved1,
	451	/* [size_is][unique][in] */ IntPtr reserved2,
	452	/* [in] */ uint reserved3,
	453	/* [out] */ out IEnumSTATSTG ppenum);
	454
	455	void DestroyElement(
	456	/* [string][in] */ string pwcsName);
	457
	458	void RenameElement(
	459	/* [string][in] */ string pwcsOldName,
	460	/* [string][in] */ string pwcsNewName);
	461
	462	void SetElementTimes(
	463	/* [string][unique][in] */ string pwcsName,
	464	/* [unique][in] */ System.Runtime.InteropServices.ComTypes.FILETIME pctime,
	465	/* [unique][in] */ System.Runtime.InteropServices.ComTypes.FILETIME patime,
	466	/* [unique][in] */ System.Runtime.InteropServices.ComTypes.FILETIME pmtime);
	467
	468	void SetClass(
	469	/* [in] */ Guid clsid);
	470
	471	void SetStateBits(
	472	/* [in] */ uint grfStateBits,
	473	/* [in] */ uint grfMask);
	474
	475	void Stat(
	476	/* [out] */ out System.Runtime.InteropServices.ComTypes.STATSTG pstatstg,
	477	/* [in] */ uint grfStatFlag);
	478
	479	}
	480	[ComVisible(false)]
	481	[ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("0000000A-0000-0000-C000-000000000046")]
	482	internal interface ILockBytes
	483	{
	484	void ReadAt(long ulOffset, System.IntPtr pv, int cb, out UIntPtr pcbRead);
	485	void WriteAt(long ulOffset, System.IntPtr pv, int cb, out UIntPtr pcbWritten);
	486	void Flush();
	487	void SetSize(long cb);
	488	void LockRegion(long libOffset, long cb, int dwLockType);
	489	void UnlockRegion(long libOffset, long cb, int dwLockType);
	490	void Stat(out System.Runtime.InteropServices.ComTypes.STATSTG pstatstg, int grfStatFlag);
	491	}
	492	[Flags]
	493	internal enum STGM : int
	494	{
	495	DIRECT = 0x00000000,
	496	TRANSACTED = 0x00010000,
	497	SIMPLE = 0x08000000,
	498	READ = 0x00000000,
	499	WRITE = 0x00000001,
	500	READWRITE = 0x00000002,
	501	SHARE_DENY_NONE = 0x00000040,
	502	SHARE_DENY_READ = 0x00000030,
	503	SHARE_DENY_WRITE = 0x00000020,
	504	SHARE_EXCLUSIVE = 0x00000010,
	505	PRIORITY = 0x00040000,
	506	DELETEONRELEASE = 0x04000000,
	507	NOSCRATCH = 0x00100000,
	508	CREATE = 0x00001000,
	509	CONVERT = 0x00020000,
	510	FAILIFTHERE = 0x00000000,
	511	NOSNAPSHOT = 0x00200000,
	512	DIRECT_SWMR = 0x00400000,
	513	}
	514
	515	internal enum STATFLAG : uint
	516	{
	517	STATFLAG_DEFAULT = 0,
	518	STATFLAG_NONAME = 1,
	519	STATFLAG_NOOPEN = 2
	520	}
	521
	522	internal enum STGTY : int
	523	{
	524	STGTY_STORAGE = 1,
	525	STGTY_STREAM = 2,
	526	STGTY_LOCKBYTES = 3,
	527	STGTY_PROPERTY = 4
	528	}
	529
	530	[DllImport("ole32.dll")]
	531	private static extern int StgIsStorageFile(
	532	[MarshalAs(UnmanagedType.LPWStr)] string pwcsName);
	533	[DllImport("ole32.dll")]
	534	private static extern int StgIsStorageILockBytes(
	535	ILockBytes plkbyt);
	536
	537
	538	[DllImport("ole32.dll")]
	539	static extern int StgOpenStorage(
	540	[MarshalAs(UnmanagedType.LPWStr)] string pwcsName,
	541	IStorage pstgPriority,
	542	STGM grfMode,
	543	IntPtr snbExclude,
	544	uint reserved,
	545	out IStorage ppstgOpen);
	546
	547	[DllImport("ole32.dll")]
	548	static extern int StgOpenStorageOnILockBytes(
	549	ILockBytes plkbyt,
	550	IStorage pStgPriority,
	551	STGM grfMode,
	552	IntPtr snbEnclude,
	553	uint reserved,
	554	out IStorage ppstgOpen);
	555	[DllImport("ole32.dll")]
	556	static extern int CreateILockBytesOnHGlobal(
	557	IntPtr hGlobal,
	558	bool fDeleteOnRelease,
	559	out ILockBytes ppLkbyt);
	560
	561	[DllImport("ole32.dll")]
	562	static extern int StgCreateDocfileOnILockBytes(ILockBytes plkbyt, STGM grfMode, int reserved, out IStorage ppstgOpen);
	563
	564	#endregion
	565	[SecuritySafeCritical]
	566	internal static int IsStorageFile(string Name)
	567	{
	568	return StgIsStorageFile(Name);
	569	}
	570	[SecuritySafeCritical]
	571	internal static int IsStorageILockBytes(ILockBytes lb)
	572	{
	573	return StgIsStorageILockBytes(lb);
	574	}
	575	[SecuritySafeCritical]
	576	internal static ILockBytes GetLockbyte(MemoryStream stream)
	577	{
	578	ILockBytes lb;
	579	var iret = CreateILockBytesOnHGlobal(IntPtr.Zero, true, out lb);
	580	byte[] docArray = stream.GetBuffer();
	581
	582	IntPtr buffer = Marshal.AllocHGlobal(docArray.Length);
	583	Marshal.Copy(docArray, 0, buffer, docArray.Length);
	584	UIntPtr readSize;
	585	lb.WriteAt(0, buffer, docArray.Length, out readSize);
	586	Marshal.FreeHGlobal(buffer);
	587
	588	return lb;
	589	}
	590	[SecuritySafeCritical]
	591	private MemoryStream ReadParts(IStorage storage, StoragePart storagePart)
	592	{
	593	MemoryStream ret = null;
	594	comTypes.STATSTG statstg;
	595
	596	storage.Stat(out statstg, (uint)STATFLAG.STATFLAG_DEFAULT);
	597
	598	IEnumSTATSTG pIEnumStatStg = null;
	599	storage.EnumElements(0, IntPtr.Zero, 0, out pIEnumStatStg);
	600
	601	comTypes.STATSTG[] regelt = { statstg };
	602	uint fetched = 0;
	603	uint res = pIEnumStatStg.Next(1, regelt, out fetched);
	604
	605	//if (regelt[0].pwcsName == "DataSpaces")
	606	//{
	607	// PrintStorage(storage, regelt[0],"");
	608	//}
	609	while (res != 1)
	610	{
	611	foreach (var item in regelt)
	612	{
	613	if (item.type == 1)
	614	{
	615	IStorage subStorage;
	616	storage.OpenStorage(item.pwcsName, null, STGM.DIRECT \| STGM.READ \| STGM.SHARE_EXCLUSIVE, IntPtr.Zero, 0, out subStorage);
	617	StoragePart subStoragePart=new StoragePart();
	618	storagePart.SubStorage.Add(item.pwcsName, subStoragePart);
	619	ReadParts(subStorage, subStoragePart);
	620	}
	621	else
	622	{
	623	storagePart.DataStreams.Add(item.pwcsName, GetOleStream(storage, item));
	624	}
	625	}
	626	res = pIEnumStatStg.Next(1, regelt, out fetched);
	627	}
	628	Marshal.ReleaseComObject(pIEnumStatStg);
	629	return ret;
	630	}
	631	// Help method to print a storage part binary to c:\temp
	632	//private void PrintStorage(IStorage storage, System.Runtime.InteropServices.ComTypes.STATSTG sTATSTG, string topName)
	633	//{
	634	// IStorage ds;
	635	// if (topName.Length > 0)
	636	// {
	637	// topName = topName[0] < 'A' ? topName.Substring(1, topName.Length - 1) : topName;
	638	// }
	639	// storage.OpenStorage(sTATSTG.pwcsName,
	640	// null,
	641	// (uint)(STGM.DIRECT \| STGM.READ \| STGM.SHARE_EXCLUSIVE),
	642	// IntPtr.Zero,
	643	// 0,
	644	// out ds);
	645
	646	// System.Runtime.InteropServices.ComTypes.STATSTG statstgSub;
	647	// ds.Stat(out statstgSub, (uint)STATFLAG.STATFLAG_DEFAULT);
	648
	649	// IEnumSTATSTG pIEnumStatStgSub = null;
	650	// System.Runtime.InteropServices.ComTypes.STATSTG[] regeltSub = { statstgSub };
	651	// ds.EnumElements(0, IntPtr.Zero, 0, out pIEnumStatStgSub);
	652
	653	// uint fetched = 0;
	654	// while (pIEnumStatStgSub.Next(1, regeltSub, out fetched) == 0)
	655	// {
	656	// string sName = regeltSub[0].pwcsName[0] < 'A' ? regeltSub[0].pwcsName.Substring(1, regeltSub[0].pwcsName.Length - 1) : regeltSub[0].pwcsName;
	657	// if (regeltSub[0].type == 1)
	658	// {
	659	// PrintStorage(ds, regeltSub[0], topName + sName + "_");
	660	// }
	661	// else if(regeltSub[0].type==2)
	662	// {
	663	// File.WriteAllBytes(@"c:\temp\" + topName + sName + ".bin", GetOleStream(ds, regeltSub[0]));
	664	// }
	665	// }
	666	//} }
	667	/// <summary>
	668	/// Read the stream and return it as a byte-array
	669	/// </summary>
	670	/// <param name="storage"></param>
	671	/// <param name="statstg"></param>
	672	/// <returns></returns>
	673	[SecuritySafeCritical]
	674	private byte[] GetOleStream(IStorage storage, comTypes.STATSTG statstg)
	675	{
	676	comTypes.IStream pIStream;
	677	storage.OpenStream(statstg.pwcsName,
	678	IntPtr.Zero,
	679	(uint)(STGM.READ \| STGM.SHARE_EXCLUSIVE),
	680	0,
	681	out pIStream);
	682
	683	byte[] data = new byte[statstg.cbSize];
	684	pIStream.Read(data, (int)statstg.cbSize, IntPtr.Zero);
	685	Marshal.ReleaseComObject(pIStream);
	686
	687	return data;
	688	}
	689
	690	[SecuritySafeCritical]
	691	internal byte[] Save()
	692	{
	693	ILockBytes lb;
	694	var iret = CreateILockBytesOnHGlobal(IntPtr.Zero, true, out lb);
	695
	696	IStorage storage = null;
	697	byte[] ret = null;
	698
	699	//Create the document in-memory
	700	if (StgCreateDocfileOnILockBytes(lb,
	701	STGM.CREATE \| STGM.READWRITE \| STGM.SHARE_EXCLUSIVE \| STGM.TRANSACTED,
	702	0,
	703	out storage)==0)
	704	{
	705	foreach(var store in this.Storage.SubStorage)
	706	{
	707	CreateStore(store.Key, store.Value, storage);
	708	}
	709	CreateStreams(this.Storage, storage);
	710	lb.Flush();
	711
	712	//Now copy the unmanaged stream to a byte array --> memory stream
	713	var statstg = new comTypes.STATSTG();
	714	lb.Stat(out statstg, 0);
	715	int size = (int)statstg.cbSize;
	716	IntPtr buffer = Marshal.AllocHGlobal(size);
	717	UIntPtr readSize;
	718	ret=new byte[size];
	719	lb.ReadAt(0, buffer, size, out readSize);
	720	Marshal.Copy(buffer, ret, 0, size);
	721	Marshal.FreeHGlobal(buffer);
	722	}
	723	Marshal.ReleaseComObject(storage);
	724	Marshal.ReleaseComObject(lb);
	725
	726	return ret;
	727	}
	728
	729	private void CreateStore(string name, StoragePart subStore, IStorage storage)
	730	{
	731	IStorage subStorage;
	732	storage.CreateStorage(name, (uint)(STGM.CREATE \| STGM.WRITE \| STGM.DIRECT \| STGM.SHARE_EXCLUSIVE), 0, 0, out subStorage);
	733	storage.Commit(0);
	734	foreach (var store in subStore.SubStorage)
	735	{
	736	CreateStore(store.Key, store.Value, subStorage);
	737	}
	738
	739	CreateStreams(subStore, subStorage);
	740	}
	741
	742	private void CreateStreams(StoragePart subStore, IStorage subStorage)
	743	{
	744	foreach (var ds in subStore.DataStreams)
	745	{
	746	comTypes.IStream stream;
	747	subStorage.CreateStream(ds.Key, (uint)(STGM.CREATE \| STGM.WRITE \| STGM.DIRECT \| STGM.SHARE_EXCLUSIVE), 0, 0, out stream);
	748	stream.Write(ds.Value, ds.Value.Length, IntPtr.Zero);
	749	}
	750	subStorage.Commit(0);
	751	}
	752
	753	}
	754	#endif
	755	}

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