Akagi201 / lwlog

A lightweight header only logging library for C

lwlog

A header only, colorful, leveled, macro implemented logging lib for C.

lwlog_emerg("This a emerge log.");
lwlog_alert("This a alert log.");
lwlog_crit("This a crit log.");
lwlog_err("This a err log.");
lwlog_warning("This a warning log.");
lwlog_notice("This a notice log.");
lwlog_info("This a info log.");
lwlog_debug("This a debug log.");

Features

• Only one header is needed.
• Colorful output to console.
• errno support.
• Simple APIs similar to printf().
• Support different logging levels.
• Zero performance overhead when logging is disabled.
• Customizable module name. [TODO]
• Transparent logging to file/console/network/syslog. [Maybe]

Install

clib install Akagi201/lwlog

Macro controls

• log level control
• color control

#define LOG_COLOR (1) // 0: off, 1: on, default: 1
#define LOG_LEVEL (7) // -1: off, 0~7: different log levels, default: 7

#include "lwlog.h"

Build & Test

$ gcc test.c
$ ./a.out