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/*
* Copyright 2012 (C) Christian Franke <nobody at nowhere dot ws>
*
* 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 3 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.
*
* You should have received a copy of the GNU General Public License
* along with This program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "util.h"
uint8_t parse_hex_char(char input)
{
if (input >= '0' && input <= '9')
return input - '0';
if (input >= 'A' && input <= 'F')
return 10 + input - 'A';
if (input >= 'a' && input <= 'f')
return 10 + input - 'a';
return -1;
}
uint8_t parse_hex_number(char *buffer, uint8_t *target)
{
uint8_t rv;
rv = parse_hex_char(buffer[0]);
if (rv == -1)
return 1;
*target = rv << 4;
rv = parse_hex_char(buffer[1]);
if (rv == -1)
return 1;
*target += rv;
return 0;
}
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