--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/securityanddataprivacytools/securitytools/certapp/utils/filestream.cpp	Wed Jul 08 11:25:26 2009 +0100
@@ -0,0 +1,230 @@
+/*
+* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: 
+*
+*/
+
+
+#include "filestream_private.h"
+#include "logger.h"
+#include "stringconv.h"
+#include "utils.h"
+
+FileStreamBuf::FileStreamBuf(const std::string &aFileName, bool aWritable, bool aSpecialTextHandling)
+	: iWritable(aWritable), iSpecialTextHandling(aSpecialTextHandling)
+{
+	if(iWritable)
+		{
+		OpenUtf8FStreamForWrite(iFile, aFileName.c_str());
+		}
+	else
+		{
+		OpenUtf8FStreamForRead(iFile, aFileName.c_str());
+		}
+	if(iFile.fail())
+		{
+		dbg << Log::Indent() << "Failed to open '" << aFileName << "' for " << ((iWritable)?("output"):("input")) << "!" << Log::Endl();
+		FatalError();
+		}
+	
+}
+
+static const char utf8Header[] = 
+	{
+		0xef, 0xbb, 0xbf
+	};
+
+static const char utf16HeaderBig[] = 
+	{
+		0xfe, 0xff
+	};
+
+static const char utf16HeaderLittle[] = 
+	{
+		0xff, 0xfe
+	};
+
+void FileStreamBuf::StripUtf8HeaderIfPresent()
+{
+	if(iWritable)
+		{
+		FatalError(); // Coding error
+		}
+
+	std::streampos savedPos = iFile.tellg();
+	char header[3];
+	iFile.read(header, sizeof(header));
+	
+	if(iFile.good() && memcmp(header, utf8Header, sizeof(utf8Header)) == 0)
+		{
+		// We read a UTF8 file header so simply return (and thereby skip it).
+		return;
+		}
+
+	if(iFile.good() && memcmp(header, utf16HeaderBig, sizeof(utf16HeaderBig)) == 0)
+		{
+		dbg << Log::Indent() << "Input file is Big Endian UTF16 - Only UTF-8 and ASCII are supported" << Log::Endl();
+		FatalError();
+		}
+	if(iFile.good() && memcmp(header, utf16HeaderLittle, sizeof(utf16HeaderLittle)) == 0)
+		{
+		dbg << Log::Indent() << "Input file is Little Endian UTF16 - Only UTF-8 and ASCII are supported" << Log::Endl();
+		FatalError();
+		}
+
+	iFile.clear();
+	iFile.seekg(savedPos);
+}
+
+
+TInt FileStreamBuf::DoReadL(TAny *aPtr,TInt aMaxLength)
+{
+BULLSEYE_OFF
+	if(iFile.fail())
+		{
+		dbg << Log::Indent() << "Read error" << Log::Endl();
+		FatalError(); // Read on broken stream
+		}
+BULLSEYE_RESTORE
+
+	iFile.read((char *)aPtr, aMaxLength);
+    
+	if(iFile.eof())
+		{
+		dbg << Log::Indent() << "Encountered EOF" << Log::Endl();
+		TInt len = iFile.gcount();
+		if(iSpecialTextHandling)
+			{
+			// Add a synthetic NL to the returned data to handle a
+			// token immediately before the EOF
+			((TUint8 *)aPtr)[len++] = '\n';
+			}
+		return len;
+		}
+
+BULLSEYE_OFF
+	if(iFile.fail())
+		{
+		dbg << Log::Indent() << "Read error" << Log::Endl();
+		FatalError(); // error other than EOF
+		}
+BULLSEYE_RESTORE
+
+	return iFile.gcount();
+}
+
+void FileStreamBuf::DoWriteL(const TUint8* aPtr,TInt aLength)
+{
+	iFile.write((const char *)aPtr, aLength);
+BULLSEYE_OFF
+	if(iFile.fail())
+		{
+		FatalError(); // error other than EOF
+		}
+BULLSEYE_RESTORE
+	//#warning "flush all data for debugging"
+	//	iFile.flush();
+}
+
+TStreamPos FileStreamBuf::DoSeekL(TMark aMark,TStreamLocation aLocation,TInt anOffset)
+{
+	std::ios_base::seekdir dir;
+	switch(aLocation)
+		{
+		case EStreamBeginning:
+			dir = std::ios_base::beg;
+			break;
+		case EStreamMark:
+			dir = std::ios_base::cur;
+			break;
+		case EStreamEnd:
+			dir = std::ios_base::end;
+			break;
+BULLSEYE_OFF
+		default:
+			FatalError();
+BULLSEYE_RESTORE
+		}
+
+	if(aMark == ERead)
+		{
+		iFile.seekg(anOffset, dir);
+BULLSEYE_OFF
+		if(iFile.fail()) FatalError(); // error other than EOF
+BULLSEYE_RESTORE
+		return iFile.tellg();
+		}
+
+	if(aMark == EWrite)
+		{
+		iFile.seekp(anOffset, dir);
+BULLSEYE_OFF
+		if(iFile.fail()) FatalError(); // error other than EOF
+BULLSEYE_RESTORE
+		return iFile.tellp();
+		}
+	
+	FatalError();
+	return -1;
+}
+
+void FileStreamBuf::DoRelease()
+{
+	iFile.close();
+}
+
+FileWriteStream::FileWriteStream(const std::string &aFileName)
+	: RWriteStream()
+{
+	iSnk = new FileStreamBuf(aFileName, true);
+}
+
+FileWriteStream::~FileWriteStream()
+{
+BULLSEYE_OFF
+	if(iSnk)
+		{
+		dbg << Log::Indent() << "forgot to close FileWriteStream" << Log::Endl();
+		FatalError();
+		}
+BULLSEYE_RESTORE
+	iSnk = 0;
+}
+
+
+
+FileReadStream::FileReadStream(const std::string &aFileName, bool aSpecialTextHandling)
+	: RReadStream()
+{
+	iSrc = new FileStreamBuf(aFileName, false, aSpecialTextHandling);
+	if(aSpecialTextHandling)
+		{
+		static_cast<FileStreamBuf *>(iSrc)->StripUtf8HeaderIfPresent();
+		}
+}
+
+
+FileReadStream::~FileReadStream()
+{
+BULLSEYE_OFF
+	if(iSrc)
+		{
+		dbg << Log::Indent() << "forgot to close FileReadStream" << Log::Endl();
+		FatalError();
+		}
+BULLSEYE_RESTORE
+	iSrc = 0;
+}
+
+// End of file