2018-08-12 13:46:08 +00:00
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/*
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Copyright (c) 2014-2018, The Monero Project
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification, are
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permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this list of
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conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice, this list
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of conditions and the following disclaimer in the documentation and/or other
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materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors may be
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used to endorse or promote products derived from this software without specific
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prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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Parts of the project are originally copyright (c) 2012-2013 The Cryptonote developers
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*/
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#include <assert.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include "util.h"
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void
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hex_to_bin(const char *hex, char *bin, size_t bin_size)
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{
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size_t len = strlen(hex);
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assert(len % 2 == 0);
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assert(bin_size >= len / 2);
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const char *ph = hex;
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while (*ph)
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{
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sscanf(ph, "%2hhx", bin++);
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ph += 2;
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}
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}
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void
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bin_to_hex(const char *bin, size_t bin_size, char *hex)
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{
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const char *hex_chars = "0123456789abcdef";
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char *ph = hex;
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const char *pb = bin;
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for (size_t i=0; i<bin_size; i++)
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{
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*ph++ = hex_chars[(*pb >> 4) & 0xF];
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*ph++ = hex_chars[(*pb++) & 0xF];
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}
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}
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void
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reverse_hex(char *hex, size_t len)
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{
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assert(len % 2 == 0);
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size_t start = 0;
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2018-08-25 13:28:41 +00:00
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size_t end = len-2;
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2018-08-12 13:46:08 +00:00
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char temp[2];
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while (start < end)
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{
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memcpy(&temp[0], &hex[start], 2);
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memcpy(&hex[start], &hex[end], 2);
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memcpy(&hex[end], &temp[0], 2);
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start += 2;
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end -= 2;
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}
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}
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void
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reverse_bin(char *bin, size_t len)
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{
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size_t start = 0;
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size_t end = len-1;
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char temp;
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while (start < end)
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{
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temp = bin[start];
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bin[start] = bin[end];
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bin[end] = temp;
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start++;
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end--;
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}
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}
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