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debug.c
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debug.c
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/*
* Copyright (C) 2015 - Martin Jaros <xjaros32@stud.feec.vutbr.cz>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <assert.h>
#include <stdio.h>
#include <stdarg.h>
#include <time.h>
#include <unistd.h>
#include <syscall.h>
#include "debug.h"
static unsigned int threshold = 0;
void debug_setlevel(unsigned int level)
{
threshold = level;
}
void debug_printf(unsigned int level, const char *file, unsigned int line, const char *msg, ...)
{
if(level > threshold) return;
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
char buffer[1024];
int num = snprintf(buffer, sizeof(buffer), "%.2lu:%.2lu:%.2lu.%.3lu [%lu] (%s:%u) %s - ",
ts.tv_sec / 3600 % 24, ts.tv_sec / 60 % 60, ts.tv_sec % 60, ts.tv_nsec / 1000000,
syscall(SYS_gettid), file, line, level == 1 ? "ERROR" : level == 2 ? "WARN" : level == 3 ? "INFO" : "DEBUG");
assert(num > 0);
va_list args;
va_start(args, msg);
int vnum = vsnprintf(buffer + num, sizeof(buffer) - num - 1, msg, args); assert(vnum > 0);
buffer[num + vnum] = '\n';
va_end(args);
num = write(STDERR_FILENO, buffer, num + vnum + 1); assert(num > 0);
}