| // Copyright 2016 The Bazel Authors. All rights reserved. | 
 | // | 
 | // Licensed 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. | 
 |  | 
 | #ifndef LINUX_SANDBOX_UTILS_H__ | 
 | #define LINUX_SANDBOX_UTILS_H__ | 
 |  | 
 | #define S(x) #x | 
 | #define S_(x) S(x) | 
 | #define S__LINE__ S_(__LINE__) | 
 |  | 
 | #define PRINT_DEBUG(...)                                        \ | 
 |   do {                                                          \ | 
 |     if (opt.debug) {                                            \ | 
 |       fprintf(stderr, __FILE__ ":" S__LINE__ ": " __VA_ARGS__); \ | 
 |       fprintf(stderr, "\n");                                    \ | 
 |     }                                                           \ | 
 |   } while (0) | 
 |  | 
 | #endif |