1 /* base64.h -- Encode binary data using printable characters. |
1 /* base64.h -- Encode binary data using printable characters. |
2 Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc. |
2 Copyright (C) 2004-2006, 2009-2012 Free Software Foundation, Inc. |
3 Written by Simon Josefsson. |
3 Written by Simon Josefsson. |
4 |
4 |
5 This program is free software; you can redistribute it and/or modify |
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 |
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) |
7 the Free Software Foundation; either version 2, or (at your option) |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 GNU General Public License for more details. |
13 GNU General Public License for more details. |
14 |
14 |
15 You should have received a copy of the GNU General Public License |
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, |
16 along with this program; if not, see <http://www.gnu.org/licenses/>. */ |
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
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18 |
17 |
19 #ifndef BASE64_H |
18 #ifndef BASE64_H |
20 # define BASE64_H |
19 # define BASE64_H |
21 |
20 |
22 /* Get size_t. */ |
21 /* Get size_t. */ |
27 |
26 |
28 /* This uses that the expression (n+(k-1))/k means the smallest |
27 /* This uses that the expression (n+(k-1))/k means the smallest |
29 integer >= n/k, i.e., the ceiling of n/k. */ |
28 integer >= n/k, i.e., the ceiling of n/k. */ |
30 # define BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4) |
29 # define BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4) |
31 |
30 |
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31 struct base64_decode_context |
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32 { |
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33 unsigned int i; |
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34 char buf[4]; |
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35 }; |
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36 |
32 extern bool isbase64 (char ch); |
37 extern bool isbase64 (char ch); |
33 |
38 |
34 extern void base64_encode (const char *restrict in, size_t inlen, |
39 extern void base64_encode (const char *restrict in, size_t inlen, |
35 char *restrict out, size_t outlen); |
40 char *restrict out, size_t outlen); |
36 |
41 |
37 extern size_t base64_encode_alloc (const char *in, size_t inlen, char **out); |
42 extern size_t base64_encode_alloc (const char *in, size_t inlen, char **out); |
38 |
43 |
39 extern bool base64_decode (const char *restrict in, size_t inlen, |
44 extern void base64_decode_ctx_init (struct base64_decode_context *ctx); |
40 char *restrict out, size_t *outlen); |
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41 |
45 |
42 extern bool base64_decode_alloc (const char *in, size_t inlen, |
46 extern bool base64_decode_ctx (struct base64_decode_context *ctx, |
43 char **out, size_t *outlen); |
47 const char *restrict in, size_t inlen, |
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48 char *restrict out, size_t *outlen); |
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49 |
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50 extern bool base64_decode_alloc_ctx (struct base64_decode_context *ctx, |
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51 const char *in, size_t inlen, |
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52 char **out, size_t *outlen); |
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53 |
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54 #define base64_decode(in, inlen, out, outlen) \ |
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55 base64_decode_ctx (NULL, in, inlen, out, outlen) |
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56 |
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57 #define base64_decode_alloc(in, inlen, out, outlen) \ |
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58 base64_decode_alloc_ctx (NULL, in, inlen, out, outlen) |
44 |
59 |
45 #endif /* BASE64_H */ |
60 #endif /* BASE64_H */ |