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