/*
 * Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
 * Written by Simon Josefsson.
 *
 * 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 2, 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, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
#ifndef _FR_BASE64_H
#define _FR_BASE64_H

RCSIDH(base64_h, "$Id: 332d05ac33f4801dc8d35666355fa91d3181fe32 $")

#include <stddef.h>
#include <stdint.h>

/* This uses that the expression (n+(k-1))/k means the smallest
   integer >= n/k, i.e., the ceiling of n/k.  */
#define FR_BASE64_ENC_LENGTH(inlen) ((((inlen) + 2) / 3) * 4)
#define FR_BASE64_DEC_LENGTH(inlen) ((3 * (inlen / 4)) + 2)

int fr_isbase64(char c);

size_t fr_base64_encode(uint8_t const *in, size_t inlen, char *out, size_t outlen);

ssize_t fr_base64_decode(char const *in, size_t inlen, uint8_t *out, size_t outlen);

#endif /* _FR_BASE64_H */
