Free the lizard

git-svn-id: svn://10.0.0.236/trunk@10 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/cmd/wincom/dllcom/src/dllutil.cpp

@@ -0,0 +1,70 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "NPL"); you may not use this file except in
+ * compliance with the NPL.  You may obtain a copy of the NPL at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the NPL is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
+ * for the specific language governing rights and limitations under the
+ * NPL.
+ *
+ * The Initial Developer of this code under the NPL is Netscape
+ * Communications Corporation.  Portions created by Netscape are
+ * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ */
+
+#include "dllcom.h"
+#include <assert.h>
+
+// Converts an OLE string (UNICODE) to an ANSI string. The caller
+// must use CoTaskMemFree to free the memory
+LPSTR
+AllocTaskAnsiString(LPOLESTR lpszString)
+{
+	LPSTR	lpszResult;
+	UINT	nBytes;
+
+	if (lpszString == NULL)
+		return NULL;
+
+#ifdef _WIN32
+	nBytes = (wcslen(lpszString) + 1) * 2;
+#else
+	nBytes = lstrlen(lpszString) + 1;  // Win 16 doesn't use any UNICODE
+#endif
+	lpszResult = (LPSTR)CoTaskMemAlloc(nBytes);
+
+	if (lpszResult) {
+#ifdef _WIN32
+		WideCharToMultiByte(CP_ACP, 0, lpszString, -1, lpszResult, nBytes, NULL, NULL);
+#else
+		lstrcpy(lpszResult, lpszString);
+#endif
+	}
+
+	return lpszResult;
+}
+
+// The caller must free the returned string using CoTaskMemFree. The
+// returned string is an ANSI string
+LPSTR
+DLL_StringFromGUID(REFGUID rGuid)
+{
+#ifdef DLL_WIN32
+	OLECHAR	szGuidID[80];
+	int 	iConvert = StringFromGUID2(rGuid, szGuidID, 80);
+
+	assert(iConvert > 0);
+	return iConvert > 0 ? AllocTaskAnsiString(szGuidID) : NULL;
+#else
+	LPSTR	lpszGuidID;
+
+	if (!SUCCEEDED(StringFromCLSID(rGuid, &lpszGuidID)))
+		return NULL;
+
+	return lpszGuidID;
+#endif
+}