From 9d258e29949866200086c15cf87ff943fa0efe0d Mon Sep 17 00:00:00 2001 From: Gijs van Tulder Date: Sun, 25 Sep 2011 14:06:58 +0200 Subject: base32: new module * modules/base32: New module. * lib/base32.c: New file. * lib/base32.h: Likewise. * m4/base32.m4: Likewise. * modules/base32-tests: New test. * tests/test-base32.c: Likewise. * MODULES.html.sh (Misc): Mention it. Signed-off-by: Eric Blake --- lib/base32.h | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 lib/base32.h (limited to 'lib/base32.h') diff --git a/lib/base32.h b/lib/base32.h new file mode 100644 index 0000000000..8768686f50 --- /dev/null +++ b/lib/base32.h @@ -0,0 +1,61 @@ +/* base32.h -- Encode binary data using printable characters. + Copyright (C) 2004-2006, 2009-2011 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, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +#ifndef BASE32_H +# define BASE32_H + +/* Get size_t. */ +# include + +/* Get bool. */ +# include + +/* 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); + +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 */ -- cgit v1.2.1