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/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-dsp-lib
* Created on: 31 мар. 2020 г.
*
* lsp-dsp-lib 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 3 of the License, or
* any later version.
*
* lsp-dsp-lib 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 lsp-dsp-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_DSP_COMMON_CODING_H_
#define LSP_PLUG_IN_DSP_COMMON_CODING_H_
#include <lsp-plug.in/dsp/common/types.h>
/**
* Encode base-64 value, the function does not generate padding '=' characters,
* since the estimated size of output data is known, caller should control size
* of input buffer to prevent the algorithm from emitting end-of-sequence
* @param dst destination buffer, should be at least 4 bytes large for encoding
* @param dst_left number of bytes left in destination buffer
* @param src source buffer
* @param src_left number of bytes left in source buffer
* @return number of bytes of source buffer processed
*/
LSP_DSP_LIB_SYMBOL(size_t, base64_enc, void *dst, size_t *dst_left, const void *src, size_t *src_left);
/**
* Decode base-64 value, the function treats '=' characters as error (for optimization purposes)
* since the estimated size of output data is known, caller should control size
* of input buffer to prevent the algorithm from emitting end-of-sequence
* @param dst destination buffer, should be at leadt 3 bytes large for decoding
* @param dst_left number of bytes left in destination buffer
* @param src source buffer
* @param src_left number of bytes left in source buffer
* @return number of bytes decoded into destination buffer, negative value on illegal character in sequence
*/
LSP_DSP_LIB_SYMBOL(ssize_t, base64_dec, void *dst, size_t *dst_left, const void *src, size_t *src_left);
#endif /* LSP_PLUG_IN_DSP_COMMON_CODING_H_ */
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