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1 | /* base64.h -- Encode binary data using printable characters. |
2 | Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc. | |
3 | Written by Simon Josefsson. | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2, or (at your option) | |
8 | any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software Foundation, | |
17 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ | |
18 | ||
19 | #ifndef BASE64_H | |
20 | # define BASE64_H | |
21 | ||
22 | /* Get size_t. */ | |
23 | # include <stddef.h> | |
24 | ||
25 | /* Get bool. */ | |
26 | # include <stdbool.h> | |
27 | ||
28 | /* This uses that the expression (n+(k-1))/k means the smallest | |
29 | integer >= n/k, i.e., the ceiling of n/k. */ | |
30 | # define BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4) | |
31 | ||
32 | extern bool isbase64 (char ch); | |
33 | ||
34 | extern void base64_encode (const char *in, size_t inlen, | |
35 | char *out, size_t outlen); | |
36 | ||
37 | extern size_t base64_encode_alloc (const char *in, size_t inlen, char **out); | |
38 | ||
39 | extern bool base64_decode (const char *in, size_t inlen, | |
40 | char *out, size_t *outlen); | |
41 | ||
42 | extern bool base64_decode_alloc (const char *in, size_t inlen, | |
43 | char **out, size_t *outlen); | |
44 | ||
45 | #endif /* BASE64_H */ |