/* base64.h -- Encode binary data using printable characters. Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc. Written by Simon Josefsson. 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 BASE64_H # define BASE64_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 BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4) extern bool isbase64 (char ch); extern void base64_encode (const char *restrict in, size_t inlen, char *restrict out, size_t outlen); extern size_t base64_encode_alloc (const char *in, size_t inlen, char **out); extern bool base64_decode (const char *restrict in, size_t inlen, char *restrict out, size_t *outlen); extern bool base64_decode_alloc (const char *in, size_t inlen, char **out, size_t *outlen); #endif /* BASE64_H */