workbench_logger.h

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#pragma once
 
#include <stdio.h>
#include <string.h>
#include <unistd.h>
 
#define __FILENAME__                                                           \
  (strrchr(__FILE__, '/') ? strrchr(__FILE__, '/') + 1 : __FILE__)
#ifndef LOG_LEVEL
#define LOG_LEVEL 4
#endif
 
#ifndef PRINT_FUNC
#define PRINT_FUNC (LOG_LEVEL > 3)
#endif
 
#ifndef PRINT_FILE
#define PRINT_FILE (LOG_LEVEL > 2)
#endif
#define COLOR(text, color, style) "\033[" #style ";" #color "m" text "\033[0m"
 
#define RED(text) COLOR(text, 31, 0) 
#define GRN(text) COLOR(text, 32, 0) 
#define YLW(text) COLOR(text, 33, 0) 
#define PRL(text) COLOR(text, 35, 0) 
#define CYN(text) COLOR(text, 36, 0) 
#define log_d(message, ...)                                                    \
  if (get_log_level() > 3)                                                     \
    log_format(__stdoutp, CYN("dbg"), message __VA_OPT__(, ) __VA_ARGS__);
#define log_i(message, ...)                                                    \
  if (get_log_level() > 2)                                                     \
    log_format(__stdoutp, GRN("inf"), message __VA_OPT__(, ) __VA_ARGS__);
#define log_w(message, ...)                                                    \
  if (get_log_level() > 1)                                                     \
    log_format(__stderrp, YLW("wrn"), YLW(message) __VA_OPT__(, ) __VA_ARGS__);
#define log_e(message, ...)                                                    \
  if (get_log_level() > 0)                                                     \
    log_format(__stderrp, RED("err"), RED(message) __VA_OPT__(, ) __VA_ARGS__);
#if PRINT_FUNC == 1
#define _fun_print_tmpl "%s "
#define _fun_print_arg , __func__
#else
#define _fun_print_tmpl ""
#define _fun_print_arg
#endif
#if PRINT_FILE == 1
#define _file_print_tmpl "(%s:%d) "
#define _file_print_arg , __FILENAME__, __LINE__
#else
#define _file_print_tmpl ""
#define _file_print_arg
#endif
 
#define log_format(file, tag, message, ...)                                    \
  fprintf(file, "[%s] " _fun_print_tmpl _file_print_tmpl message "\n",         \
          tag _fun_print_arg _file_print_arg __VA_OPT__(, ) __VA_ARGS__);