public static string ToUpper(string src, string locale)
{
if (src == null)
{
return(string.Empty);
}
int length = src.Length + 10;
IntPtr resPtr = Marshal.AllocCoTaskMem(length * 2);
try
{
ErrorCode err;
int outLength = NativeMethods.u_strToUpper(resPtr, length, src, src.Length, locale, out err);
if (err > 0 && err != ErrorCode.BUFFER_OVERFLOW_ERROR)
{
throw new Exception("UnicodeString.ToUpper() failed with code " + err);
}
if (outLength > length)
{
err = ErrorCode.NoErrors; // ignore possible U_BUFFER_OVERFLOW_ERROR
Marshal.FreeCoTaskMem(resPtr);
length = outLength + 1;
resPtr = Marshal.AllocCoTaskMem(length * 2);
NativeMethods.u_strToUpper(resPtr, length, src, src.Length, locale, out err);
}
if (err > 0)
{
throw new Exception("UnicodeString.ToUpper() failed with code " + err);
}
string result = Marshal.PtrToStringUni(resPtr);
// Strip any garbage left over at the end of the string.
if (err == ErrorCode.STRING_NOT_TERMINATED_WARNING && result != null)
{
return(result.Substring(0, outLength));
}
return(result);
}
finally
{
Marshal.FreeCoTaskMem(resPtr);
}
}
