+
−/* base64.h -- Encode binary data using printable characters.
+
−   Copyright (C) 2004-2006, 2009-2012 Free Software Foundation, Inc.
+
−   Written by Simon Josefsson.
+
−
+
−   This program is free software; you can redistribute it and/or modify
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−   it under the terms of the GNU General Public License as published by
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−   the Free Software Foundation; either version 2, or (at your option)
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−   any later version.
+
−
+
−   This program is distributed in the hope that it will be useful,
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−   but WITHOUT ANY WARRANTY; without even the implied warranty of
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−   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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−   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 <http://www.gnu.org/licenses/>.  */
+
−
+
−#ifndef BASE64_H
+
−# define BASE64_H
+
−
+
−/* Get size_t. */
+
−# include <stddef.h>
+
−
+
−/* Get bool. */
+
−# include <stdbool.h>
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−
+
−/*! This uses that the expression (n+(k-1))/k means the smallest
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−   integer >= n/k, i.e., the ceiling of n/k.  */
+
−# define BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4)
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−
+
−struct base64_decode_context
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−{
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−  unsigned int i;
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−  char buf[4];
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−};
+
−
+
−extern bool isbase64 (char ch);
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−
+
−extern void base64_encode (const char *restrict in, size_t inlen,
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−                           char *restrict out, size_t outlen);
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−
+
−extern size_t base64_encode_alloc (const char *in, size_t inlen, char **out);
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−
+
−extern void base64_decode_ctx_init (struct base64_decode_context *ctx);
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−
+
−extern bool base64_decode_ctx (struct base64_decode_context *ctx,
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−                               const char *restrict in, size_t inlen,
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−                               char *restrict out, size_t *outlen);
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−
+
−extern bool base64_decode_alloc_ctx (struct base64_decode_context *ctx,
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−                                     const char *in, size_t inlen,
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−                                     char **out, size_t *outlen);
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−
+
−#define base64_decode(in, inlen, out, outlen) \
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−        base64_decode_ctx (NULL, in, inlen, out, outlen)
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−
+
−#define base64_decode_alloc(in, inlen, out, outlen) \
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−        base64_decode_alloc_ctx (NULL, in, inlen, out, outlen)
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−
+
−#endif /* BASE64_H */