Function PathRelativeToApp

src/Helpers.c:880–921

============================================================================= PathRelativeToApp()

//  PathRelativeToApp()
//
void PathRelativeToApp (
    LPWSTR lpszSrc, LPWSTR lpszDest, int cchDest, BOOL bSrcIsFile,
    BOOL bUnexpandEnv, BOOL bUnexpandMyDocs )
{
    WCHAR wchAppPath[MAX_PATH];
    WCHAR wchWinDir[MAX_PATH];
    WCHAR wchUserFiles[MAX_PATH];
    WCHAR wchPath[MAX_PATH];
    WCHAR wchResult[MAX_PATH];
    DWORD dwAttrTo = ( bSrcIsFile ) ? 0 : FILE_ATTRIBUTE_DIRECTORY;
    GetModuleFileName ( NULL, wchAppPath, COUNTOF ( wchAppPath ) );
    PathRemoveFileSpec ( wchAppPath );
    GetWindowsDirectory ( wchWinDir, COUNTOF ( wchWinDir ) );
    SHGetFolderPath ( NULL, CSIDL_PERSONAL, NULL, SHGFP_TYPE_CURRENT, wchUserFiles );
    if ( bUnexpandMyDocs &&
            !PathIsRelative ( lpszSrc ) &&
            !PathIsPrefix ( wchUserFiles, wchAppPath ) &&
            PathIsPrefix ( wchUserFiles, lpszSrc ) &&
            PathRelativePathTo ( wchPath, wchUserFiles, FILE_ATTRIBUTE_DIRECTORY, lpszSrc, dwAttrTo ) ) {
        lstrcpy ( wchUserFiles, L"%CSIDL:MYDOCUMENTS%" );
        PathAppend ( wchUserFiles, wchPath );
        lstrcpy ( wchPath, wchUserFiles );
    } else if ( PathIsRelative ( lpszSrc ) || PathCommonPrefix ( wchAppPath, wchWinDir, NULL ) ) {
        lstrcpyn ( wchPath, lpszSrc, COUNTOF ( wchPath ) );
    } else {
        if ( !PathRelativePathTo ( wchPath, wchAppPath, FILE_ATTRIBUTE_DIRECTORY, lpszSrc, dwAttrTo ) ) {
            lstrcpyn ( wchPath, lpszSrc, COUNTOF ( wchPath ) );
        }
    }
    if ( bUnexpandEnv ) {
        if ( !PathUnExpandEnvStrings ( wchPath, wchResult, COUNTOF ( wchResult ) ) ) {
            lstrcpyn ( wchResult, wchPath, COUNTOF ( wchResult ) );
        }
    } else {
        lstrcpyn ( wchResult, wchPath, COUNTOF ( wchResult ) );
    }
    if ( lpszDest == NULL || lpszSrc == lpszDest ) {
        lstrcpyn ( lpszSrc, wchResult, ( cchDest == 0 ) ? MAX_PATH : cchDest );
    } else {
        lstrcpyn ( lpszDest, wchResult, ( cchDest == 0 ) ? MAX_PATH : cchDest );
    }
}


//=============================================================================