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utility.c
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utility.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* utility.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: lkaser <lkaser@student.42.us.org> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2019/03/04 13:43:23 by lkaser #+# #+# */
/* Updated: 2019/03/04 13:43:25 by lkaser ### ########.fr */
/* */
/* ************************************************************************** */
#include <stdint.h>
#include "libft.h"
#include "ft_ssl.h"
/*
** Converts bytes into a hexidecimal encoded string.
*/
char *bytes_to_hex(const uint8_t *bytes, size_t size)
{
static const char digits[16] = "0123456789abcdef";
char *out;
size_t i;
size_t j;
NULL_GUARD(out = malloc(size * 2 + 1));
i = 0;
j = 0;
while (i < size)
{
out[j++] = digits[(bytes[i] / 16) % 16];
out[j++] = digits[bytes[i] % 16];
++i;
}
out[j] = '\0';
return (out);
}