--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/meetingrequest/mrversit2/src/cesmricalcontentlinereader.cpp Thu Dec 17 08:39:21 2009 +0200
@@ -0,0 +1,297 @@
+/*
+* Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "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: This file implements class CESMRICalContentLineReader.
+*
+*/
+
+
+// Class include.
+#include "emailtrace.h"
+#include "cesmricalcontentlinereader.h" // CESMRICalContentLineReader
+
+//debug
+
+// System includes.
+#include <s32strm.h> // RReadStream
+#include <utf.h> // CnvUtfConverter
+
+// User includes.
+#include "esmricalkeywords.h" // Literals.
+
+namespace
+{
+// Constants.
+const TInt KICalSkipWhiteSpaceLength = 1;
+const TInt KICalSkipCRLength = 1;
+const TInt KICalStartChar = 0;
+
+/*
+The iCalendar specification states that a content line should be no longer than
+75 octets in length, excluding the CRLF delimiter. It appears that MS Outlook
+does not include the length of the property string when calculating the length
+of a content line, meaning that a content line in an iCalendar exported from MS
+Outlook may be longer than the allowed 75 octets. KICalMaxContentLineLength
+allows a little extra space to support this.
+*/
+const TInt KICalMaxContentLineLength = 120;
+}//namespace
+
+// ======== MEMBER FUNCTIONS ========
+
+// ---------------------------------------------------------------------------
+// CESMRICalContentLineReader::NewL
+// ---------------------------------------------------------------------------
+//
+CESMRICalContentLineReader* CESMRICalContentLineReader::NewL(RReadStream& aStream)
+ {
+ FUNC_LOG;
+
+ CESMRICalContentLineReader* self = CESMRICalContentLineReader::NewLC(aStream);
+ CleanupStack::Pop(self);
+
+ return self;
+ }
+
+// ---------------------------------------------------------------------------
+// CESMRICalContentLineReader::NewLC
+// ---------------------------------------------------------------------------
+//
+CESMRICalContentLineReader* CESMRICalContentLineReader::NewLC(RReadStream& aStream)
+ {
+ FUNC_LOG;
+
+ CESMRICalContentLineReader* self = new (ELeave) CESMRICalContentLineReader(aStream);
+ CleanupStack::PushL(self);
+ self->ConstructL();
+
+ return self;
+ }
+
+// ---------------------------------------------------------------------------
+// CESMRICalContentLineReader::~CESMRICalContentLineReader
+// ---------------------------------------------------------------------------
+//
+CESMRICalContentLineReader::~CESMRICalContentLineReader()
+ {
+ FUNC_LOG;
+
+ delete iCurrentLine;
+ delete iNextLine;
+
+ }
+
+// ---------------------------------------------------------------------------
+// CESMRICalContentLineReader::GetNextContentLine
+// ---------------------------------------------------------------------------
+//
+TInt CESMRICalContentLineReader::GetNextContentLine(TPtrC& aPtr)
+ {
+ FUNC_LOG;
+
+ if (iFlags & EEof)
+ {
+ return KErrEof;
+ }
+
+ TInt error(KErrNone);
+
+ // Trap errors as the stream will leave with KErrEof when we reach the end.
+ TRAP(error, GetNextContentLineL());
+
+ aPtr.Set(iCurrentLine->Des());
+
+ if (error == KErrEof)
+ {
+ iFlags |= EEof;
+ error = KErrNone;
+ }
+
+ return error;
+ }
+
+// ---------------------------------------------------------------------------
+// CESMRICalContentLineReader::SkipComponentL
+// ---------------------------------------------------------------------------
+//
+void CESMRICalContentLineReader::SkipComponentL(const TDesC& aName)
+ {
+ FUNC_LOG;
+
+ // Take a copy of the name, since GetNextContentLine may corrupt the original
+ HBufC* beginName = aName.AllocLC();
+
+ // Find the next BEGIN: or END:
+ TPtrC contentLine;
+ TInt error(GetNextContentLine(contentLine));
+ while (error == KErrNone)
+ {
+ // Find the colon separator
+ const TInt colonPos = contentLine.Locate(KICalColonChar);
+ // If there isn't one it's an error
+ if (colonPos == KErrNotFound)
+ {
+ User::Leave(KErrCorrupt);
+ }
+ // Find the string preceding the colon
+ TPtrC name(contentLine.Left(colonPos));
+ // If it's a begin, recursively skip this component also
+ if (name.CompareF(KICalBegin) == 0)
+ {
+ TPtrC value(contentLine.Mid(colonPos + 1));
+ SkipComponentL(value);
+ }
+ // If it's an end, check that it's the right end
+ else if (name.CompareF(KICalEnd) == 0)
+ {
+ TPtrC value(contentLine.Mid(colonPos + 1));
+ if (value.CompareF(*beginName) == 0)
+ {
+ // We have successfully skipped the component
+ CleanupStack::PopAndDestroy(beginName);
+ return;
+ }
+ else
+ {
+ User::Leave(KErrCorrupt);
+ }
+ }
+ // If it is neither a begin nor an end, try the next line
+ error = GetNextContentLine(contentLine);
+ }
+ // If any errors occur in reading we may as well leave with them
+ if (error != KErrEof)
+ {
+ User::Leave(error);
+ }
+ // If we get this far we have failed to find an end
+ User::Leave(KErrCorrupt);
+
+ }
+
+// ---------------------------------------------------------------------------
+// CESMRICalContentLineReader::CESMRICalContentLineReader
+// ---------------------------------------------------------------------------
+//
+CESMRICalContentLineReader::CESMRICalContentLineReader(RReadStream& aStream)
+ : iReadStream(aStream)
+ {
+ FUNC_LOG;
+ //do nothing
+ }
+
+// ---------------------------------------------------------------------------
+// CESMRICalContentLineReader::ConstructL
+// ---------------------------------------------------------------------------
+//
+void CESMRICalContentLineReader::ConstructL()
+ {
+ FUNC_LOG;
+
+ iCurrentLine = HBufC::NewL(KICalMaxContentLineLength);
+ iNextLine = HBufC::NewL(KICalMaxContentLineLength);
+
+ }
+
+// ---------------------------------------------------------------------------
+// CESMRICalContentLineReader::GetLineL
+// ---------------------------------------------------------------------------
+//
+/**
+Reads from the stream to the next line feed.
+@param aPtr A modifiable pointer to a buffer to read the line into.
+@leave With KErrEof when the end of the stream is reached or KErrCorrupt if the
+line is invalid.
+@internalTechnology
+*/
+void CESMRICalContentLineReader::GetLineL(TPtr& aPtr)
+ {
+ FUNC_LOG;
+
+ // Read stream as binary. ReadL() will leave with KErrEof when the end of the stream
+ // is reached. Note that we will ignore any text read when leaving as the line must end
+ // with a carriage return (and line feed) to be valid.
+ TBuf8<KICalMaxContentLineLength> text;
+ iReadStream.ReadL(text, TChar(KICalCarriageReturnChar)); // Read up to the next CR.
+
+ // Check next char is line feed
+ TUint8 nextChar(iReadStream.ReadUint8L());
+
+ if (nextChar != KICalNewlineChar)
+ {
+ User::Leave(KErrCorrupt);
+ }
+
+ // Handle any character set conversion here
+ CnvUtfConverter::ConvertToUnicodeFromUtf8(aPtr, text); // Convert from UTF-8.
+
+ // Set the length of aPtr to exclude the carriage return.
+ if (aPtr.Length())
+ {
+ aPtr.SetLength(aPtr.Length() - KICalSkipCRLength);
+ }
+
+ }
+
+// ---------------------------------------------------------------------------
+// CESMRICalContentLineReader::GetNextContentLineL
+// ---------------------------------------------------------------------------
+//
+/**
+Reads the next content line from the stream into aPtr. If the content line has
+been folded, it will be unfolded. After completion aPtr will point to the new
+content line
+@param aPtr TPtrC& to set to the new content line.
+@leave Leaves with KErrEof when we reach the end of the stream.
+@internalTechnology
+*/
+void CESMRICalContentLineReader::GetNextContentLineL()
+ {
+ FUNC_LOG;
+
+ TPtr currentLine(iCurrentLine->Des());
+
+ if (iNextLine->Length() == 0)
+ {
+ // If iNextLine is empty then this is the first line of the file.
+ GetLineL(currentLine);
+ }
+ else
+ {
+ // Copy iNextLine to currentLine.
+ currentLine.Copy(*iNextLine);
+ }
+
+ // Get the next line.
+ TPtr nextPtr(iNextLine->Des());
+ GetLineL(nextPtr);
+
+ // Folded lines are delimited by a CRLF followed by single whitepace
+ while (iNextLine->Length() && ((nextPtr[KICalStartChar] == KICalSpaceChar) ||
+ (nextPtr[KICalStartChar] == KICalHTabChar)))
+ {
+ // Append the lines - reallocate buffer if needed.
+ if (currentLine.MaxLength() < (iCurrentLine->Length() + nextPtr.Length()))
+ {
+ iCurrentLine = iCurrentLine->ReAllocL(currentLine.MaxLength() + KICalMaxContentLineLength);
+ currentLine.Set(iCurrentLine->Des());
+ }
+
+ currentLine.Append(nextPtr.Mid(KICalSkipWhiteSpaceLength));
+ GetLineL(nextPtr);
+ }
+
+ }
+
+// End of File
+