1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
/* base64.h -- Encode binary data using printable characters.
Copyright (C) 2004, 2005, 2006, 2009, 2010 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 3, 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 BASE64_H
# define BASE64_H
/* Get size_t. */
# include <stddef.h>
/* Get bool. */
# include <stdbool.h>
/* This uses that the expression (n+(k-1))/k means the smallest
integer >= n/k, i.e., the ceiling of n/k. */
# define BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4)
struct base64_decode_context
{
unsigned int i;
char buf[4];
};
extern bool isbase64 (char ch);
extern void base64_encode (const char *restrict in, size_t inlen,
char *restrict out, size_t outlen);
extern size_t base64_encode_alloc (const char *in, size_t inlen, char **out);
extern void base64_decode_ctx_init (struct base64_decode_context *ctx);
extern bool base64_decode_ctx (struct base64_decode_context *ctx,
const char *restrict in, size_t inlen,
char *restrict out, size_t *outlen);
extern bool base64_decode_alloc_ctx (struct base64_decode_context *ctx,
const char *in, size_t inlen,
char **out, size_t *outlen);
#define base64_decode(in, inlen, out, outlen) \
base64_decode_ctx (NULL, in, inlen, out, outlen)
#define base64_decode_alloc(in, inlen, out, outlen) \
base64_decode_alloc_ctx (NULL, in, inlen, out, outlen)
#endif /* BASE64_H */
|