1# clog: C-style (a-la printf) logging library 2 3[](https://github.com/pytorch/cpuinfo/blob/master/deps/clog/LICENSE) 4 5C-style library for logging errors, warnings, information notes, and debug information. 6 7## Features 8 9- printf-style interface for formatting variadic parameters. 10- Separate functions for logging errors, warnings, information notes, and debug information. 11- Independent logging settings for different modules. 12- Logging to logcat on Android and stderr/stdout on other platforms. 13- Compatible with C99 and C++. 14- Covered with unit tests. 15 16## Example 17 18```c 19#include <clog.h> 20 21#ifndef MYMODULE_LOG_LEVEL 22 #define MYMODULE_LOG_LEVEL CLOG_DEBUG 23#endif 24 25CLOG_DEFINE_LOG_DEBUG(mymodule_, "My Module", MYMODULE_LOG_LEVEL); 26CLOG_DEFINE_LOG_INFO(mymodule_, "My Module", MYMODULE_LOG_LEVEL); 27CLOG_DEFINE_LOG_WARNING(mymodule_, "My Module", MYMODULE_LOG_LEVEL); 28CLOG_DEFINE_LOG_ERROR(mymodule_, "My Module", MYMODULE_LOG_LEVEL); 29 30... 31 32void some_function(...) { 33 int status = ... 34 if (status != 0) { 35 mymodule_log_error( 36 "something really bad happened: " 37 "operation failed with status %d", status); 38 } 39 40 uint32_t expected_zero = ... 41 if (expected_zero != 0) { 42 mymodule_log_warning( 43 "something suspicious happened (var = %"PRIu32"), " 44 "fall back to generic implementation", expected_zero); 45 } 46 47 void* usually_non_null = ... 48 if (usually_non_null == NULL) { 49 mymodule_log_info( 50 "something unusual, but common, happened: " 51 "enabling work-around"); 52 } 53 54 float a = ... 55 mymodule_log_debug("computed a = %.7f", a); 56} 57``` 58
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