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#ifndef GMIO_INTERNAL_ZLIB_UTILS_H
#define GMIO_INTERNAL_ZLIB_UTILS_H

#include "../global.h"
#include "../zlib_compress.h"
#include <zlib.h>

/*! Converts zlib error to gmio "zlib-specific" error */
int zlib_error_to_gmio_error(int z_error);

/*! Wrapper around deflateInit2(), returns a converted gmio error code */
int gmio_zlib_compress_init(
        struct z_stream_s* z_stream,
        const struct gmio_zlib_compress_options* z_opts);

/*! Checks zlib compression options */
bool gmio_check_zlib_compress_options(
        int* error, const struct gmio_zlib_compress_options* z_opts);

/*! Decompresses the source buffer into the destination buffer.
 *  \p src_len is the byte length of the source buffer. Upon entry, \p dest_len
 *  is the total size of the destination buffer, which must be large enough to
 *  hold the entire uncompressed data.
 *  Upon exit, \p dest_len is the actual size of the compressed buffer. */
int gmio_zlib_uncompress_buffer(
        uint8_t* dest, size_t* dest_len, const uint8_t* src, size_t src_len);

/*! Computes the CRC-32 value with the bytes from \p buff */
uint32_t gmio_zlib_crc32(const uint8_t* buff, size_t buff_len);

/*! Returns the required initial value for gmio_zlib_crc32_update() */
uint32_t gmio_zlib_crc32_initial();

/*! Updates a running CRC-32 with the bytes from \p buff */
uint32_t gmio_zlib_crc32_update(
        uint32_t crc, const uint8_t* buff, size_t buff_len);

#endif /* GMIO_INTERNAL_ZLIB_UTILS_H */