Adding files to handle charset conversion (r=smeredith)

git-svn-id: svn://10.0.0.236/trunk@118285 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/cck/globals/encoding.cpp

@@ -0,0 +1,120 @@
+#include "encoding.h"
+
+// For supporting customization with non-ascii characters through Cecko,
+// the encoding of cck.che is changed to UTF8. Widget values are converted
+// to and fro between native encoding and UTF8 encoding. That is, the 
+// native text entered in the wizard are saved to in-memory copy as UTF8,
+// and when displayed in the wizard they are converted back to native 
+// encoding. 
+// For customizing the Windows system text strings like program folder
+// name, additional components and CD autorun strings, encoding is 
+// changed from UTF8 back to native encoding.
+
+
+// Convert native encoding to UTF8 encoding
+__declspec(dllexport)
+CString ConvertANSItoUTF8(CString strAnsi)
+{
+	int wLen, mLen, retval;
+	CString strUtf8;
+
+	wLen = MultiByteToWideChar(CP_ACP, 0, strAnsi, -1, NULL, 0);
+	if (wLen == 0)
+	{
+		ShowLastError();
+		return strAnsi;
+	}
+	LPWSTR strWidechar = new WCHAR[wLen];
+	retval = MultiByteToWideChar(CP_ACP, 0, strAnsi, -1, strWidechar, wLen); 
+	if (retval == 0)
+	{
+		ShowLastError();
+		delete [] strWidechar;
+		return strAnsi;
+	}
+
+	mLen = WideCharToMultiByte(CP_UTF8, 0, strWidechar, -1, NULL, 0, NULL, NULL);
+	if (mLen == 0)
+	{
+		ShowLastError();
+		delete [] strWidechar;
+		return strAnsi;
+	}
+	LPSTR strMultibyte = new TCHAR[mLen];
+	retval = WideCharToMultiByte(CP_UTF8, 0, strWidechar, -1, strMultibyte, 
+		mLen, NULL, NULL);
+	if (retval == 0)
+	{
+		ShowLastError();
+		delete [] strWidechar;
+		delete [] strMultibyte;
+		return strAnsi;
+	}
+
+	strUtf8 = strMultibyte;
+	delete [] strWidechar;
+	delete [] strMultibyte;
+	return strUtf8;
+}
+
+// Convert UTF8 encoding to native encoding
+__declspec(dllexport)
+CString ConvertUTF8toANSI(CString strUtf8)
+{
+	int wLen, mLen, retval;
+	CString strAnsi;
+	wLen = MultiByteToWideChar(CP_UTF8, 0, strUtf8, -1, NULL, 0);
+	if (wLen == 0)
+	{
+		ShowLastError();
+		return strUtf8;
+	}
+	LPWSTR strWidechar = new WCHAR[wLen];		
+	retval = MultiByteToWideChar(CP_UTF8, 0, strUtf8, -1, strWidechar, wLen); 
+	if (retval == 0)
+	{
+		ShowLastError();
+		delete [] strWidechar;
+		return strUtf8;
+	}
+
+	mLen = WideCharToMultiByte(CP_ACP, 0, strWidechar, -1, NULL, 0, NULL, NULL);
+	if (mLen == 0)
+	{
+		ShowLastError();
+		delete [] strWidechar;
+		return strUtf8;
+	}
+	LPSTR strMultibyte = new TCHAR[mLen];
+	retval = WideCharToMultiByte(CP_ACP, 0, strWidechar, -1, strMultibyte, 
+		mLen, NULL, NULL);
+	if (retval == 0)
+	{
+		ShowLastError();
+		delete [] strWidechar;
+		delete [] strMultibyte;
+		return strUtf8;
+	}
+
+	strAnsi = strMultibyte;
+	delete [] strWidechar;
+	delete [] strMultibyte;
+	return strAnsi;
+}
+
+// Display error message
+extern "C" __declspec(dllexport)
+void ShowLastError()
+{
+	char* lpMsgBuf;
+	FormatMessage( 
+          FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
+          NULL,
+          GetLastError(),
+          MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), 
+          (LPTSTR) &lpMsgBuf,
+          0,
+          NULL);      
+	MessageBox( NULL, lpMsgBuf, "Error", MB_OK|MB_ICONINFORMATION );
+	LocalFree(lpMsgBuf);
+}

mozilla/cck/globals/encoding.h

@@ -0,0 +1,5 @@
+#include "stdafx.h"
+
+extern "C" __declspec(dllexport) void ShowLastError();
+__declspec(dllexport) CString ConvertANSItoUTF8(CString strAnsi);
+__declspec(dllexport) CString ConvertUTF8toANSI(CString strUtf8);