*-map tests: Fix compilation error.
[gnulib.git] / lib / base32.h
blob921931771120d14e99e0a86ddb202d43535e2d48
1 /* base32.h -- Encode binary data using printable characters.
2 Copyright (C) 2004-2006, 2009-2019 Free Software Foundation, Inc.
3 Adapted from Simon Josefsson's base64 code by Gijs van Tulder.
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.
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.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, see <https://www.gnu.org/licenses/>. */
18 #ifndef BASE32_H
19 # define BASE32_H
21 /* Get size_t. */
22 # include <stddef.h>
24 /* Get bool. */
25 # include <stdbool.h>
27 /* This uses that the expression (n+(k-1))/k means the smallest
28 integer >= n/k, i.e., the ceiling of n/k. */
29 # define BASE32_LENGTH(inlen) ((((inlen) + 4) / 5) * 8)
31 struct base32_decode_context
33 unsigned int i;
34 char buf[8];
37 extern bool isbase32 (char ch) _GL_ATTRIBUTE_CONST;
39 extern void base32_encode (const char *restrict in, size_t inlen,
40 char *restrict out, size_t outlen);
42 extern size_t base32_encode_alloc (const char *in, size_t inlen, char **out);
44 extern void base32_decode_ctx_init (struct base32_decode_context *ctx);
46 extern bool base32_decode_ctx (struct base32_decode_context *ctx,
47 const char *restrict in, size_t inlen,
48 char *restrict out, size_t *outlen);
50 extern bool base32_decode_alloc_ctx (struct base32_decode_context *ctx,
51 const char *in, size_t inlen,
52 char **out, size_t *outlen);
54 #define base32_decode(in, inlen, out, outlen) \
55 base32_decode_ctx (NULL, in, inlen, out, outlen)
57 #define base32_decode_alloc(in, inlen, out, outlen) \
58 base32_decode_alloc_ctx (NULL, in, inlen, out, outlen)
60 #endif /* BASE32_H */