/* base64.h -- Encode binary data using printable characters. Copyright (C) 2004-2006, 2009-2023 Free Software Foundation, Inc. Written by Simon Josefsson. This file is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This file 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program. If not, see . */ #ifndef BASE64_H # define BASE64_H /* This file uses _GL_ATTRIBUTE_CONST. */ #if !_GL_CONFIG_H_INCLUDED #error "Please include config.h first." #endif /* Get idx_t. */ # include # ifdef __cplusplus extern "C" { # endif /* 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) struct base64_decode_context { int i; char buf[4]; }; extern bool isbase64 (char ch) _GL_ATTRIBUTE_CONST; extern void base64_encode (const char *restrict in, idx_t inlen, char *restrict out, idx_t outlen); extern idx_t base64_encode_alloc (const char *in, idx_t inlen, char **out); extern void base64_decode_ctx_init (struct base64_decode_context *ctx); extern bool base64_decode_ctx (struct base64_decode_context *ctx, const char *restrict in, idx_t inlen, char *restrict out, idx_t *outlen); extern bool base64_decode_alloc_ctx (struct base64_decode_context *ctx, const char *in, idx_t inlen, char **out, idx_t *outlen); #define base64_decode(in, inlen, out, outlen) \ base64_decode_ctx (NULL, in, inlen, out, outlen) #define base64_decode_alloc(in, inlen, out, outlen) \ base64_decode_alloc_ctx (NULL, in, inlen, out, outlen) # ifdef __cplusplus } # endif #endif /* BASE64_H */