itoa - convert int to char *

itoa.c

char *itoa(int i)
{
	static char buf[12];
	int j = 11;
	int sign = 0;
	buf[j] = '\0';
	if(i < 0)
	{
		i = -i;
		sign = 1;
	}
	do
	{
		j--;
		buf[j] = i % 10 + '0';
		i /= 10;
	} while(i);
	if(sign)
	{
		j--;
		buf[j] = '-';
	}
	return buf + j;
}

char *uitoa(unsigned int i)
{
	static char buf[12];
	int j = 11;
	buf[j] = '\0';
	do
	{
		j--;
		buf[j] = i % 10 + '0';
		i /= 10;
	} while(i);
	return buf + j;
}