cjdns/util/Hex.h

/* vim: set expandtab ts=4 sw=4: */
/*
 * You may redistribute this program 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 <https://www.gnu.org/licenses/>.
 */
#ifndef Hex_H
#define Hex_H

#include "memory/Allocator.h"

#include "util/Linker.h"
Linker_require("util/Hex.c")

#include <stdint.h>
#include <stdbool.h>

/** Returned by Hex_decode() if the input is not valid hex. */
#define Hex_BAD_INPUT -1

/** Returned by Hex_decode() or Hex_encode() if the output buffer is too small. */
#define Hex_TOO_BIG -2

int Hex_encode(uint8_t* output,
               const uint32_t outputLength,
               const uint8_t* in,
               const uint32_t inputLength);

int Hex_decode(uint8_t* output,
               const uint32_t outLength,
               const uint8_t* in,
               const uint32_t inputLength);

bool Hex_isHexEntity(const uint8_t character);

int Hex_decodeByte(const uint8_t highNibble, const uint8_t lowNibble);

uint8_t Hex_encodeLowNibble(const uint8_t nibble);

char* Hex_print(void* bytes, uint32_t length, struct Allocator* alloc);

#endif