Line | Count | Source (jump to first uncovered line) |
1 | | /* base32.h -- Encode binary data using printable characters. |
2 | | Copyright (C) 2004-2006, 2009-2025 Free Software Foundation, Inc. |
3 | | Adapted from Simon Josefsson's base64 code by Gijs van Tulder. |
4 | | |
5 | | This file is free software: you can redistribute it and/or modify |
6 | | it under the terms of the GNU Lesser General Public License as |
7 | | published by the Free Software Foundation; either version 2.1 of the |
8 | | License, or (at your option) any later version. |
9 | | |
10 | | This file 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 Lesser General Public License for more details. |
14 | | |
15 | | You should have received a copy of the GNU Lesser General Public License |
16 | | along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
17 | | |
18 | | #ifndef BASE32_H |
19 | | #define BASE32_H |
20 | | |
21 | | /* This file uses _GL_INLINE_HEADER_BEGIN. */ |
22 | | #if !_GL_CONFIG_H_INCLUDED |
23 | | #error "Please include config.h first." |
24 | | #endif |
25 | | |
26 | | /* Get idx_t. */ |
27 | | #include <idx.h> |
28 | | |
29 | | /* Pacify GCC in isubase32. */ |
30 | | #if 4 < __GNUC__ + (3 <= __GNUC_MINOR__) && !defined __clang__ |
31 | | # pragma GCC diagnostic ignored "-Wtype-limits" |
32 | | #endif |
33 | | |
34 | | _GL_INLINE_HEADER_BEGIN |
35 | | #ifndef BASE32_INLINE |
36 | | # define BASE32_INLINE _GL_INLINE |
37 | | #endif |
38 | | |
39 | | #ifdef __cplusplus |
40 | | extern "C" { |
41 | | #endif |
42 | | |
43 | | /* This uses that the expression (n+(k-1))/k means the smallest |
44 | | integer >= n/k, i.e., the ceiling of n/k. */ |
45 | 0 | #define BASE32_LENGTH(inlen) ((((inlen) + 4) / 5) * 8) |
46 | | |
47 | | struct base32_decode_context |
48 | | { |
49 | | int i; |
50 | | char buf[8]; |
51 | | }; |
52 | | |
53 | | extern signed char const base32_to_int[256]; |
54 | | |
55 | | BASE32_INLINE bool |
56 | | isubase32 (unsigned char ch) |
57 | 0 | { |
58 | 0 | return ch < sizeof base32_to_int && 0 <= base32_to_int[ch]; |
59 | 0 | } |
60 | | |
61 | | BASE32_INLINE bool |
62 | | isbase32 (char ch) |
63 | 0 | { |
64 | 0 | return isubase32 (ch); |
65 | 0 | } |
66 | | |
67 | | extern void base32_encode (const char *restrict in, idx_t inlen, |
68 | | char *restrict out, idx_t outlen); |
69 | | |
70 | | extern idx_t base32_encode_alloc (const char *in, idx_t inlen, char **out); |
71 | | |
72 | | /* Initialize decode-context buffer, CTX. */ |
73 | | BASE32_INLINE void |
74 | | base32_decode_ctx_init (struct base32_decode_context *ctx) |
75 | 0 | { |
76 | 0 | ctx->i = 0; |
77 | 0 | } |
78 | | |
79 | | extern bool base32_decode_ctx (struct base32_decode_context *ctx, |
80 | | const char *restrict in, idx_t inlen, |
81 | | char *restrict out, idx_t *outlen); |
82 | | |
83 | | extern bool base32_decode_alloc_ctx (struct base32_decode_context *ctx, |
84 | | const char *in, idx_t inlen, |
85 | | char **out, idx_t *outlen); |
86 | | |
87 | | #define base32_decode(in, inlen, out, outlen) \ |
88 | | base32_decode_ctx (NULL, in, inlen, out, outlen) |
89 | | |
90 | | #define base32_decode_alloc(in, inlen, out, outlen) \ |
91 | 0 | base32_decode_alloc_ctx (NULL, in, inlen, out, outlen) |
92 | | |
93 | | #ifdef __cplusplus |
94 | | } |
95 | | #endif |
96 | | |
97 | | _GL_INLINE_HEADER_END |
98 | | |
99 | | #endif /* BASE32_H */ |