xref: /trunk/main/sal/systools/win32/uwinapi/GetLongPathName.cpp (revision 24297db34623acd4ed3cd634e301c7c8a91fabbc)

/**************************************************************
 *
 * 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;
}