/*
 * base64.h -- base64 encoding and decoding
 *
 * Copyright (c) 2013-2021 David Demelier <markand@malikania.fr>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef BASE64_H
#define BASE64_H

#include <stddef.h>

#if defined(__cplusplus)
extern "C" {
#endif

#define B64_ENCODE_LENGTH(x) (4 * ((x) / 3 + 1))
#define B64_DECODE_LENGTH(x) (3 * ((x) / 4))

int
b64_isbase64(unsigned char ch);

int
b64_isvalid(unsigned char ch);

unsigned char
b64_lookup(unsigned char value);

unsigned char
b64_rlookup(unsigned char ch);

size_t
b64_encode(const char *src, size_t srcsz, char *dst, size_t dstsz);

size_t
b64_decode(const char *src, size_t srcsz, char *dst, size_t dstsz);

#if defined(__cplusplus)
}
#endif

#endif /* !BASE64_H */