68 lines
3.0 KiB
C
68 lines
3.0 KiB
C
/****************************************************************************
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** Copyright (c) 2016, Fougue Ltd. <http://www.fougue.pro>
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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**
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** 2. Redistributions in binary form must reproduce the above
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** copyright notice, this list of conditions and the following
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** disclaimer in the documentation and/or other materials provided
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** with the distribution.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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****************************************************************************/
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#ifndef GMIO_INTERNAL_ZLIB_UTILS_H
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#define GMIO_INTERNAL_ZLIB_UTILS_H
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#include "../global.h"
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#include "../zlib_compress.h"
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#include <zlib.h>
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/*! Converts zlib error to gmio "zlib-specific" error */
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int zlib_error_to_gmio_error(int z_error);
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/*! Wrapper around deflateInit2(), returns a converted gmio error code */
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int gmio_zlib_compress_init(
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struct z_stream_s* z_stream,
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const struct gmio_zlib_compress_options* z_opts);
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/*! Checks zlib compression options */
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bool gmio_check_zlib_compress_options(
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int* error, const struct gmio_zlib_compress_options* z_opts);
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/*! Decompresses the source buffer into the destination buffer.
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* \p src_len is the byte length of the source buffer. Upon entry, \p dest_len
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* is the total size of the destination buffer, which must be large enough to
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* hold the entire uncompressed data.
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* Upon exit, \p dest_len is the actual size of the compressed buffer. */
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int gmio_zlib_uncompress_buffer(
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uint8_t* dest, size_t* dest_len, const uint8_t* src, size_t src_len);
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/*! Computes the CRC-32 value with the bytes from \p buff */
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uint32_t gmio_zlib_crc32(const uint8_t* buff, size_t buff_len);
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/*! Returns the required initial value for gmio_zlib_crc32_update() */
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uint32_t gmio_zlib_crc32_initial();
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/*! Updates a running CRC-32 with the bytes from \p buff */
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uint32_t gmio_zlib_crc32_update(
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uint32_t crc, const uint8_t* buff, size_t buff_len);
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#endif /* GMIO_INTERNAL_ZLIB_UTILS_H */
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