| // checking for overloads of abs() |
| |
| /*************************************************************************** |
| * |
| * 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 under the License. |
| * |
| * Copyright 1999-2007 Rogue Wave Software, Inc. |
| * |
| **************************************************************************/ |
| |
| // determine whether the abs() function (including |
| // any overloads) is defined in the usual libc headers |
| |
| #include <math.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #include "config.h" |
| |
| #ifndef _RWSTD_NO_LONG_LONG |
| # if defined _MSC_VER |
| # define LONG_LONG __int64 |
| # else |
| # define LONG_LONG long long |
| # endif |
| #endif // _RWSTD_NO_LONG_LONG |
| |
| |
| int template_used; |
| |
| template <class T> |
| T abs (T t) |
| { |
| ++template_used; |
| |
| return t; |
| } |
| |
| template <class T> |
| void check_abs (T t, const char *tname) |
| { |
| template_used = 0; |
| |
| abs (t); |
| |
| if (0 == template_used) |
| printf ("%s", "// "); |
| |
| printf ("#define _RWSTD_NO_ABS_%s\n", tname); |
| } |
| |
| int main () |
| { |
| check_abs ((bool)0, "BOOL"); |
| check_abs ((char)0, "CHAR"); |
| check_abs ((signed char)0, "SCHAR"); |
| check_abs ((unsigned char)0, "UCHAR"); |
| check_abs ((short)0, "SHRT"); |
| check_abs ((unsigned short)0, "USHRT"); |
| check_abs ((int)0, "INT"); |
| check_abs ((unsigned)0, "UINT"); |
| check_abs ((long)0, "LONG"); |
| check_abs ((unsigned long)0, "ULONG"); |
| |
| #if defined (LONG_LONG) |
| check_abs ((LONG_LONG)0, "LLONG"); |
| check_abs ((unsigned LONG_LONG)0, "ULLONG"); |
| #endif // LONG_LONG |
| |
| return 0; |
| } |