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/**
* libkeccak – Keccak-family hashing library
*
* Copyright © 2014, 2015 Mattias Andrée (maandree@member.fsf.org)
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef LIBKECCAK_HEX_H
#define LIBKECCAK_HEX_H 1
#include <stddef.h>
/**
* Convert a binary hashsum to lower case hexadecimal representation
*
* @param output Output array, should have an allocation size of at least `2 * n + 1`
* @param hashsum The hashsum to convert
* @param n The size of `hashsum`
*/
__attribute__((leaf, nonnull, nothrow))
void libkeccak_behex_lower(char* restrict output, const char* restrict hashsum, size_t n);
/**
* Convert a binary hashsum to upper case hexadecimal representation
*
* @param output Output array, should have an allocation size of at least `2 * n + 1`
* @param hashsum The hashsum to convert
* @param n The size of `hashsum`
*/
__attribute__((leaf, nonnull, nothrow))
void libkeccak_behex_upper(char* restrict output, const char* restrict hashsum, size_t n);
/**
* Convert a hexadecimal hashsum (both lower case, upper
* case and mixed is supported) to binary representation
*
* @param output Output array, should have an allocation size of at least `strlen(hashsum) / 2`
* @param hashsum The hashsum to convert
*/
__attribute__((leaf, nonnull, nothrow))
void libkeccak_unhex(char* restrict output, const char* restrict hashsum);
#endif
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