lz4s.h

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#ifndef ROSLZ4_LZ4S_H
#define ROSLZ4_LZ4S_H

#include <lz4.h>

#ifdef __cplusplus
extern "C" {
#endif

// Return codes
const int ROSLZ4_MEMORY_ERROR = -5;
const int ROSLZ4_PARAM_ERROR = -4;
const int ROSLZ4_DATA_ERROR = -3;
const int ROSLZ4_OUTPUT_SMALL = -2;
const int ROSLZ4_ERROR = -1;
const int ROSLZ4_OK = 0;
const int ROSLZ4_STREAM_END = 2;

// Actions
const int ROSLZ4_RUN = 0;
const int ROSLZ4_FINISH = 1;

typedef struct {
  char *input_next;
  int input_left;

  char *output_next;
  int output_left;

  int total_in;
  int total_out;

  int block_size_id;

  // Internal use
  void *state;
} roslz4_stream;

// Low level functions
int roslz4_blockSizeFromIndex(int block_id);

int roslz4_compressStart(roslz4_stream *stream, int block_size_id);
int roslz4_compress(roslz4_stream *stream, int action);
void roslz4_compressEnd(roslz4_stream *stream);

int roslz4_decompressStart(roslz4_stream *stream);
int roslz4_decompress(roslz4_stream *stream);
void roslz4_decompressEnd(roslz4_stream *str);

// Oneshot compression / decompression
int roslz4_buffToBuffCompress(char *input, unsigned int input_size,
                              char *output, unsigned int *output_size,
                              int block_size_id);
int roslz4_buffToBuffDecompress(char *input, unsigned int input_size,
                                char *output, unsigned int *output_size);

#ifdef __cplusplus
}
#endif

#endif // ROSLZ4_LZ4S_H