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// Copyright 2017 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 SRC_MAIN_TOOLS_LOGGING_H_
#define SRC_MAIN_TOOLS_LOGGING_H_
// see
// http://stackoverflow.com/questions/5641427/how-to-make-preprocessor-generate-a-string-for-line-keyword
#define S(x) #x
#define S_(x) S(x)
#define S__LINE__ S_(__LINE__)
#define DIE(...) \
{ \
fprintf(stderr, __FILE__ ":" S__LINE__ ": \"" __VA_ARGS__); \
fprintf(stderr, "\": "); \
perror(nullptr); \
exit(EXIT_FAILURE); \
}
#define PRINT_DEBUG(...) \
do { \
if (global_debug) { \
fprintf(stderr, __FILE__ ":" S__LINE__ ": " __VA_ARGS__); \
fprintf(stderr, "\n"); \
} \
} while (0)
// Set to `true` to let PRINT_DEBUG() print messages.
extern bool global_debug;
#endif // SRC_MAIN_TOOLS_LOGGING_H_
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