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/*
* Copyright (C) Freie Universität Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @{
*
* @file
* @author Martine Lenders <mlenders@inf.fu-berlin.de>
*/
#include <stdbool.h>
#include "common.h"
size_t hex2ints(uint8_t *out, const char *in)
{
bool upper = true;
size_t out_size = 0;
while (*in != '\0') {
char c;
if ((*in >= '0') && (*in <= '9')) {
c = '0';
}
else if ((*in >= 'a') && (*in <= 'f')) {
c = 'a' - 10;
}
else if ((*in >= 'A') && (*in <= 'F')) {
c = 'A' - 10;
}
else {
in++;
continue;
}
if (upper) {
*out = (char)(*in - c) << 4;
}
else {
*out |= (char)(*in - c);
out++;
out_size++;
}
upper = !upper;
in++;
}
if (!upper) {
out_size++;
}
return out_size;
}
/** @} */