--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/genericservices/mimerecognitionfw/rec/RECTXT.CPP Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,120 @@
+// Copyright (c) 1997-2009 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:
+//
+
+#include <apmrec.h>
+#include <apmstd.h>
+#include "RECTXT.H"
+#include <ecom/implementationproxy.h>
+
+const TUid KUidMimeTxtRecognizer={0x100012FB};
+const TInt KMinBufferLength=42; // minimum amount of file needed to determine a text file IF it's not called .TXT
+const TInt KMaxBufferLength=1024; // maximum amount of buffer space we will ever use
+_LIT8(KDataTypeTextPlain,"text/plain");
+_LIT(KTextFileExt,".txt");
+
+CApaTextRecognizer::CApaTextRecognizer()
+ :CApaDataRecognizerType(KUidMimeTxtRecognizer,CApaDataRecognizerType::ELow)
+ // Text files are low recognition - they don't have a clear signature
+ {
+ iCountDataTypes=1;
+ }
+
+TUint CApaTextRecognizer::PreferredBufSize()
+ {
+ return KMaxBufferLength;
+ }
+
+#if defined(_DEBUG)
+TDataType CApaTextRecognizer::SupportedDataTypeL(TInt aIndex) const
+#else
+TDataType CApaTextRecognizer::SupportedDataTypeL(TInt /*aIndex*/) const
+#endif
+ {
+ __ASSERT_DEBUG(aIndex==0,User::Invariant());
+ return TDataType(KDataTypeTextPlain);
+ }
+
+void CApaTextRecognizer::DoRecognizeL(const TDesC& aName, const TDesC8& aBuffer)
+ {
+ TBool nameRecognized=EFalse;
+
+ // check if the file has valid UIDs
+ if (aBuffer.Length() >= 16)
+ {
+ // if the first 3 bytes are valid UIDs,then this file is not a plain/text.
+ // Set iConfidence appropriately and exit.
+ const TCheckedUid checkUid(aBuffer.Left(16));
+ if (checkUid.UidType().IsValid())
+ {
+ iConfidence=ENotRecognized;
+ return;
+ }
+ }
+
+ if (aName.Length()>4)
+ {
+ nameRecognized=(aName.Right(4).CompareF(KTextFileExt)==0);
+ }
+ const TInt length=Min(aBuffer.Length(), KMaxBufferLength);
+ if (length<KMinBufferLength && !nameRecognized)
+ return;
+ TInt ii;
+ for (ii=0; ii<length; ii++)
+ {
+ const TUint chr=aBuffer[ii];
+ // these are guesses of what WON'T be in a text file
+ if (chr<9 || chr==11 || chr==12 || (chr>13 && chr<32))
+ {
+ break;
+ }
+ if (chr>148)
+ {
+ break;
+ }
+ }
+ const TBool validChars=(ii==length);
+
+ if (nameRecognized)
+ {
+ iConfidence=validChars? EProbable : EUnlikely;
+ }
+ else
+ {
+ if (!validChars)
+ {
+ return;
+ }
+ iConfidence=EPossible;
+ }
+ iDataType=TDataType(KDataTypeTextPlain);
+ }
+
+CApaDataRecognizerType* CApaTextRecognizer::CreateRecognizerL()
+ {
+ return new (ELeave) CApaTextRecognizer();
+ }
+
+const TImplementationProxy ImplementationTable[] =
+ {
+ IMPLEMENTATION_PROXY_ENTRY(0x101F7DA0,CApaTextRecognizer::CreateRecognizerL)
+ };
+
+EXPORT_C const TImplementationProxy* ImplementationGroupProxy(TInt& aTableCount)
+ {
+ aTableCount = sizeof(ImplementationTable) / sizeof(TImplementationProxy);
+ return ImplementationTable;
+ }
+
+