| // checking if integer math traps |
| |
| /*************************************************************************** |
| * |
| * 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. |
| * |
| **************************************************************************/ |
| |
| #include "nodbg.h" |
| |
| |
| #if defined (_MSC_VER) |
| # define TRY __try |
| # define EXCEPT(expr) __except (expr) |
| #else // not MSVC |
| # define TRY if (1) |
| # define EXCEPT(ignore) else if (0) |
| #endif // _MSC_VER |
| |
| |
| int get_int (int); |
| |
| |
| volatile int int_zero; |
| volatile int int_one; |
| |
| |
| int main (int argc, char*[]) |
| { |
| nodbg (); |
| |
| // test expects to be called with no command line arguments |
| // i.e., (argc < 2) is expected to hold |
| |
| // argc used to try to foil optimizers |
| int_zero = get_int (argc); |
| int_one = get_int (argc); |
| |
| int result [2]; |
| |
| TRY { |
| // use both division and modulo to try to foil optimizers |
| result [0] = int_one / int_zero; |
| result [1] = int_one % int_zero; |
| } |
| EXCEPT (1) { |
| return 1; |
| } |
| |
| // NEGATIVE test: successful exit status indicates a failure |
| return argc < 2 ? result [0] : result [1]; |
| } |
| |
| // use volatile to try to foil optimizers |
| volatile int int_value; |
| |
| // use recursion to try to foil optimizers |
| int get_int (int arg) |
| { |
| if (1 < arg) |
| return get_int (arg - 1) + get_int (arg - 2); |
| |
| const int value = int_value; |
| |
| ++int_value; |
| |
| return value; |
| } |