| /* base32.h -- Encode binary data using printable characters. |
| Copyright (C) 2004-2006, 2009-2020 Free Software Foundation, Inc. |
| Adapted from Simon Josefsson's base64 code by Gijs van Tulder. |
| |
| 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 2, 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, see <https://www.gnu.org/licenses/>. */ |
| |
| #ifndef BASE32_H |
| # define BASE32_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 BASE32_LENGTH(inlen) ((((inlen) + 4) / 5) * 8) |
| |
| struct base32_decode_context |
| { |
| unsigned int i; |
| char buf[8]; |
| }; |
| |
| extern bool isbase32 (char ch) _GL_ATTRIBUTE_CONST; |
| |
| extern void base32_encode (const char *restrict in, size_t inlen, |
| char *restrict out, size_t outlen); |
| |
| extern size_t base32_encode_alloc (const char *in, size_t inlen, char **out); |
| |
| extern void base32_decode_ctx_init (struct base32_decode_context *ctx); |
| |
| extern bool base32_decode_ctx (struct base32_decode_context *ctx, |
| const char *restrict in, size_t inlen, |
| char *restrict out, size_t *outlen); |
| |
| extern bool base32_decode_alloc_ctx (struct base32_decode_context *ctx, |
| const char *in, size_t inlen, |
| char **out, size_t *outlen); |
| |
| #define base32_decode(in, inlen, out, outlen) \ |
| base32_decode_ctx (NULL, in, inlen, out, outlen) |
| |
| #define base32_decode_alloc(in, inlen, out, outlen) \ |
| base32_decode_alloc_ctx (NULL, in, inlen, out, outlen) |
| |
| #endif /* BASE32_H */ |