compression.h

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 *
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#ifndef GRPC_COMPRESSION_H
#define GRPC_COMPRESSION_H

#include <stdlib.h>

#include <grpc/support/port_platform.h>

#ifdef __cplusplus
extern "C" {
#endif

#define GRPC_COMPRESSION_ALGORITHM_ARG "grpc.compression_algorithm"
#define GRPC_COMPRESSION_ALGORITHM_STATE_ARG "grpc.compression_algorithm_state"

/* The various compression algorithms supported by GRPC */
typedef enum {
  GRPC_COMPRESS_NONE = 0,
  GRPC_COMPRESS_DEFLATE,
  GRPC_COMPRESS_GZIP,
  /* TODO(ctiller): snappy */
  GRPC_COMPRESS_ALGORITHMS_COUNT
} grpc_compression_algorithm;

typedef enum {
  GRPC_COMPRESS_LEVEL_NONE = 0,
  GRPC_COMPRESS_LEVEL_LOW,
  GRPC_COMPRESS_LEVEL_MED,
  GRPC_COMPRESS_LEVEL_HIGH,
  GRPC_COMPRESS_LEVEL_COUNT
} grpc_compression_level;

typedef struct grpc_compression_options {
  gpr_uint32 enabled_algorithms_bitset; 
  grpc_compression_algorithm default_compression_algorithm; 
} grpc_compression_options;

int grpc_compression_algorithm_parse(const char *name, size_t name_length,
                                     grpc_compression_algorithm *algorithm);

int grpc_compression_algorithm_name(grpc_compression_algorithm algorithm,
                                    char **name);

grpc_compression_level grpc_compression_level_for_algorithm(
    grpc_compression_algorithm algorithm);

grpc_compression_algorithm grpc_compression_algorithm_for_level(
    grpc_compression_level level);

void grpc_compression_options_init(grpc_compression_options *opts);

void grpc_compression_options_enable_algorithm(
     grpc_compression_options *opts, grpc_compression_algorithm algorithm);

void grpc_compression_options_disable_algorithm(
    grpc_compression_options *opts, grpc_compression_algorithm algorithm);

int grpc_compression_options_is_algorithm_enabled(
    const grpc_compression_options *opts, grpc_compression_algorithm algorithm);

#ifdef __cplusplus
}
#endif

#endif /* GRPC_COMPRESSION_H */