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