58 lines
1.7 KiB
Markdown
58 lines
1.7 KiB
Markdown
# clog: C-style (a-la printf) logging library
|
|
|
|
[](https://github.com/pytorch/cpuinfo/blob/master/deps/clog/LICENSE)
|
|
|
|
C-style library for logging errors, warnings, information notes, and debug information.
|
|
|
|
## Features
|
|
|
|
- printf-style interface for formatting variadic parameters.
|
|
- Separate functions for logging errors, warnings, information notes, and debug information.
|
|
- Independent logging settings for different modules.
|
|
- Logging to logcat on Android and stderr/stdout on other platforms.
|
|
- Compatible with C99 and C++.
|
|
- Covered with unit tests.
|
|
|
|
## Example
|
|
|
|
```c
|
|
#include <clog.h>
|
|
|
|
#ifndef MYMODULE_LOG_LEVEL
|
|
#define MYMODULE_LOG_LEVEL CLOG_DEBUG
|
|
#endif
|
|
|
|
CLOG_DEFINE_LOG_DEBUG(mymodule_, "My Module", MYMODULE_LOG_LEVEL);
|
|
CLOG_DEFINE_LOG_INFO(mymodule_, "My Module", MYMODULE_LOG_LEVEL);
|
|
CLOG_DEFINE_LOG_WARNING(mymodule_, "My Module", MYMODULE_LOG_LEVEL);
|
|
CLOG_DEFINE_LOG_ERROR(mymodule_, "My Module", MYMODULE_LOG_LEVEL);
|
|
|
|
...
|
|
|
|
void some_function(...) {
|
|
int status = ...
|
|
if (status != 0) {
|
|
mymodule_log_error(
|
|
"something really bad happened: "
|
|
"operation failed with status %d", status);
|
|
}
|
|
|
|
uint32_t expected_zero = ...
|
|
if (expected_zero != 0) {
|
|
mymodule_log_warning(
|
|
"something suspicious happened (var = %"PRIu32"), "
|
|
"fall back to generic implementation", expected_zero);
|
|
}
|
|
|
|
void* usually_non_null = ...
|
|
if (usually_non_null == NULL) {
|
|
mymodule_log_info(
|
|
"something unusual, but common, happened: "
|
|
"enabling work-around");
|
|
}
|
|
|
|
float a = ...
|
|
mymodule_log_debug("computed a = %.7f", a);
|
|
}
|
|
```
|