xref: /trunk/main/sal/systools/win32/uwinapi/GetLongPathName.cpp (revision fc0bc008)

/**************************************************************
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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{
	DWORD	dwResult = 0;	// Assume failure

	if ( IsBadStringPtr( lpShortPath, MAX_PATH ) )
	{
		SetLastError( ERROR_INVALID_PARAMETER );
		return dwResult;
	}

	// Assume a not existing buffer means a bufsize of zero
	if ( !lpLongPath )
		cchBuffer = 0;

	if ( _tcslen( lpShortPath ) == 2 && lpShortPath[1] == ':' )
	{
		_tcscpy( lpLongPath, lpShortPath );
		dwResult = _tcslen( lpLongPath );
	}
	else
	{
		HANDLE			hFind;
		WIN32_FIND_DATA	aFindFileData;

		if ( lpShortPath[_tcslen(lpShortPath)-1] == '\\' )
		{
			TCHAR	szFilePath[MAX_PATH];

			_tcscpy( szFilePath, lpShortPath );
			_tcscat( szFilePath, TEXT("*.*") );
			hFind = FindFirstFile( szFilePath, &aFindFileData );;
			aFindFileData.cFileName[0] = 0;
		}
		else
		{
			hFind = FindFirstFile( lpShortPath, &aFindFileData );
			if ( !IsValidHandle( hFind ) )
			{
				TCHAR	szFilePath[MAX_PATH];

				_tcscpy( szFilePath, lpShortPath );
				_tcscat( szFilePath, TEXT("\\*.*") );
				hFind = FindFirstFile( szFilePath, &aFindFileData );;
				aFindFileData.cFileName[0] = 0;
			}
		}

		if ( IsValidHandle( hFind ) )
		{
			FindClose( hFind );

			LPCTSTR	lpLastSlash = _tcsrchr( lpShortPath, '\\' );

			if ( lpLastSlash )
			{
				int	nParentLen = lpLastSlash - lpShortPath;
				LPTSTR	lpParentPath = (LPTSTR)_alloca( (nParentLen + 1) * sizeof(TCHAR) );

				CopyMemory( lpParentPath, lpShortPath, nParentLen * sizeof(TCHAR) );
				lpParentPath[nParentLen] = 0;

				dwResult = GetLongPathName( lpParentPath, lpLongPath, cchBuffer );

				if ( !dwResult )
					_tcscpy( lpLongPath, lpParentPath );
			}
			else
			{
				_tcscpy( lpLongPath, lpShortPath );
				dwResult = _tcslen( lpLongPath );
			}

			if ( dwResult < cchBuffer )
			{
				_tcscat( lpLongPath, TEXT("\\") );
				_tcscat( lpLongPath, aFindFileData.cFileName );
				dwResult = _tcslen( lpLongPath );
			}
			else
				dwResult += _tcslen( aFindFileData.cFileName ) + 1;
		}
	}

	return dwResult;
}