--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/textandlocutils/nearestlangutils/src/LangUtilImpl.h	Tue Sep 07 16:39:34 2010 +0800
@@ -0,0 +1,148 @@
+// 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:
+//
+
+#ifndef __LANGUTILIMPL_H__
+#define __LANGUTILIMPL_H__
+
+
+#include <f32file.h>
+#include <e32std.h>
+
+/**
+Specifies the maximum length of the numerical part of the suffix.
+
+If this is changed the documentation of the following functions 
+must also be updated:
+
+	LangUtil::NearestLanguageFile()
+	TNearestLanguageFileFinder::CountDigitsFromEndInValidSuffix()
+	TNearestLanguageFileFinder::SetFileName()
+*/
+const TInt KMaxSuffixLength = 5;
+
+class RDirectoryScanner
+/**
+@internalAll
+*/
+    {
+public:
+    virtual TInt Open(RFs& aFs, const TDesC& aMatchPattern) = 0;
+    virtual TInt Next(TEntry& aOut) = 0;
+    virtual void Close() = 0;
+    virtual ~RDirectoryScanner() {}
+    };
+
+NONSHARABLE_CLASS(RRealDirectoryScanner) : public RDirectoryScanner
+/**
+@internalAll
+*/
+    {
+public:
+    virtual TInt Open(RFs& aFs, const TDesC& aMatchPattern);
+    virtual TInt Next(TEntry& aOut);
+    virtual void Close();
+private:
+    RDir iDir;
+    };
+
+
+/**
+ * Add a language to the end of the language path, unless it is already
+ * present. On entry, the language path must have an ELangNone entry at its
+ * end. This will be true on exit also.
+ * @internalAll
+ */
+void AddLanguage(TLanguagePath& aPath, TLanguage aNewLanguage);
+
+/**
+ * Create a language path from the current language, ideal language and locale. 
+ * The path may have up to eight entries in it.
+ * @internalAll
+ */
+
+void MakeLanguageDowngradePath(TLanguagePath& aPath,
+	TLanguage aCurrent, TLanguage aIdeal, const TLocale& aLocale);
+
+
+/**
+ * This class contains all the functions for working out the nearest language
+ * file. It can be derived from for test code purposes.
+ * @internalAll
+ */
+NONSHARABLE_CLASS(TNearestLanguageFileFinder)
+	{
+public:
+	TNearestLanguageFileFinder(const RFs& aFs);
+	TBool SetFileName(TFileName& aFileName);
+	TLanguage Language();
+	// put back the original suffix and drive letter
+	void RepairFileName();
+	// add the preset custom resource drive, if any, to iDrives.
+	TInt AddCustomResourceDrive();
+	// add all remaining drives to iDrives. iDrives must not have more than one
+	// drive in it on entry.
+	void AddAllDrives();
+	// Tries to append the language code to iFileName. This is 00..09 or just the number.
+	// If there was not enough space, EFalse is returned.
+	TBool AppendLanguageCode(TLanguage aLanguage);
+	// Search the drives in iDrives for the file named iFileName.
+	// iFileName must have a drive specifier, which will be overwritten.
+	TBool FindDrive();
+	// Search for files across all drives in all languages in the path plus the
+	// language-neutral file.
+	// On entry, iFileName should be the original name with a drive specifier
+	// minus the suffix. On return, iFileName will be untouched if EFalse is
+	// returned, but contain the result if ETrue is returned.
+	TBool FindLanguageAndDrive();
+	// Test whether the filename passed in matches the stem given + numbers
+	// added to the end. Returns the number if it does, or KErrNotFound if not.
+	// aFileName must not end in a digit.
+	static TInt LanguageNumberFromFile(const TDesC& aFileName, const TDesC& aStem);
+	// Find lowest numbered file that matches iFileName, which must be without
+	// its suffix.
+	TInt FindFirstLanguageFile(RFs&);
+	// Try each drive for any language files that match iFileName.
+	// iFileName must have a directory specifier and be without its suffix.
+	// returns KErrNotFound, KErrNone or error code.
+	TInt FindFirstLanguageFileAndDrive();
+
+	virtual TInt GetCustomResourceDriveNumber() const;
+	
+	virtual TInt FileExists(const TDesC& aFileName) const;
+	// return our member that is our directory scanning class
+	virtual RDirectoryScanner& DirectoryScanner();
+	virtual ~TNearestLanguageFileFinder() {}
+	
+private:
+	TInt CountDigitsFromEnd(const TDesC& aFilename);
+	TInt CountDigitsFromEndInSuffix (const TDesC& aFilename);
+
+public:
+	const RFs& iFs;
+	TFileName* iFileName;
+	TLanguage  iLanguage;
+	TBuf<26> iDrives;
+	TLanguagePath iPath;
+	TBuf<KMaxSuffixLength> iSuffix;
+	TInt iInitialDriveLetter;
+	// length minus the removed suffix
+	TInt iOriginalBaseLength;
+	// length plus added drive letter minus removed suffix
+	TInt iBaseLength;
+	RRealDirectoryScanner iDirScanner;
+	};
+
+#endif // __LANGUTILIMPL_H__
+