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/*
* Multi-level message logging
*
* Copyright IBM Corp. 2021
*
* s390-tools is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#include <stdio.h>
#include <stdarg.h>
#include "lib/util_log.h"
static int current_log_level = UTIL_LOG_INFO;
static const char *log_level_to_str(int log_level)
{
switch (log_level) {
case UTIL_LOG_ERROR:
return "ERROR";
case UTIL_LOG_WARN:
return "WARN";
case UTIL_LOG_INFO:
return "INFO";
case UTIL_LOG_DEBUG:
return "DEBUG";
case UTIL_LOG_TRACE:
return "TRACE";
default:
return "UNKNW";
}
}
static void log_helper(FILE *fp, int log_level, const char *fmt, va_list args)
{
if (current_log_level < log_level)
return;
fprintf(fp, "%5s: ", log_level_to_str(log_level));
vfprintf(fp, fmt, args);
}
/**
* Changes the current log level
*
* @param[in] log_level A new log level to be set as the current one
*/
void util_log_set_level(int log_level)
{
current_log_level = log_level;
}
/**
* Outputs the given message on stderr
*
* The given message is printed only if the current log level is >= than the given one.
*
* @param[in] log_level Log level starting from which the given message shall be printed
* @param[in] fmt Format string for generation of the log message
* @param[in] ... Parameters for format string
*/
void util_log_print(int log_level, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
log_helper(stderr, log_level, fmt, args);
va_end(args);
}
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