Rainbow Log

Simple, coloured logging with levels.

Build

Add as a git submodule and link with the rlog target.

Use

Logging prints to stdout, with an interface similar to printf:

#include "rlog.h"

RLOG_INFO("Hello %s", "world!");

There are 6 levels:

typedef enum
{
    RLOG_LEVEL_CRITICAL = 0,
    RLOG_LEVEL_ERROR = 1,
    RLOG_LEVEL_WARNING = 2,
    RLOG_LEVEL_INFO = 3,
    RLOG_LEVEL_VERBOSE = 4,
    RLOG_LEVEL_DEBUG = 5,
} RLogLevel;

Filtering

Level filtering is done in two ways:

A run-time global variable which defaults to RLOG_LEVEL_INFO and is changed like so:

void
set_rlog_level(RLOG_LEVEL_WARNING);

A compile-time definition RLOG_MAX_LEVEL. Levels above this value should be optimized away by the compiler. If not defined, this defaults to RLOG_LEVEL_VERBOSE for release builds and RLOG_LEVEL_DEBUG for debug builds.

#ifndef RLOG_MAX_LEVEL
#ifdef DEBUG
#define RLOG_MAX_LEVEL RLOG_LEVEL_DEBUG
#else
#define RLOG_MAX_LEVEL RLOG_LEVEL_VERBOSE
#endif
#endif

This could be used to enable different log levels output per-file.