63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
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/*
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* This file is part of the Black Magic Debug project.
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*
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* Copyright (C) 2011 Black Sphere Technologies Ltd.
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* Written by Gareth McMullin <gareth@blacksphere.co.nz>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* Convenience function to convert to/from ascii strings of hex digits.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include "hex_utils.h"
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static char hexdigits[] = "0123456789abcdef";
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char * hexify(char *hex, const unsigned char *buf, int size)
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{
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char *tmp = hex;
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while(size--) {
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*tmp++ = hexdigits[*buf >> 4];
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*tmp++ = hexdigits[*buf++ & 0xF];
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}
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*tmp++ = 0;
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return hex;
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}
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static uint8_t unhex_digit(char hex)
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{
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uint8_t tmp = hex - '0';
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if(tmp > 9)
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tmp -= 'A' - '0' - 10;
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if(tmp > 16)
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tmp -= 'a' - 'A';
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return tmp;
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}
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char * unhexify(unsigned char *buf, const char *hex, int size)
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{
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while(size--) {
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*buf = unhex_digit(*hex++) << 4;
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*buf++ |= unhex_digit(*hex++);
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}
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return buf;
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}
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