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/*
*
* Copyright 2016, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef GRPC_IMPL_CODEGEN_COMPRESSION_TYPES_H
#define GRPC_IMPL_CODEGEN_COMPRESSION_TYPES_H
#include <grpc/impl/codegen/port_platform.h>
#include <stdbool.h>
#ifdef __cplusplus
extern "C" {
#endif
/** To be used as initial metadata key for the request of a concrete compression
* algorithm */
#define GRPC_COMPRESSION_REQUEST_ALGORITHM_MD_KEY \
"grpc-internal-encoding-request"
/** To be used in channel arguments */
#define GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM \
"grpc.default_compression_algorithm"
#define GRPC_COMPRESSION_CHANNEL_DEFAULT_LEVEL "grpc.default_compression_level"
#define GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET \
"grpc.compression_enabled_algorithms_bitset"
/* 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;
/** Compression levels allow a party with knowledge of its peer's accepted
* encodings to request compression in an abstract way. The level-algorithm
* mapping is performed internally and depends on the peer's supported
* compression algorithms. */
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 {
/** All algs are enabled by default. This option corresponds to the channel
* argument key behind \a GRPC_COMPRESSION_CHANNEL_ENABLED_ALGORITHMS_BITSET
*/
uint32_t enabled_algorithms_bitset;
/** The default channel compression level. It'll be used in the absence of
* call specific settings. This option corresponds to the channel argument key
* behind \a GRPC_COMPRESSION_CHANNEL_DEFAULT_LEVEL. If present, takes
* precedence over \a default_algorithm.
* TODO(dgq): currently only available for server channels. */
struct {
bool is_set;
grpc_compression_level level;
} default_level;
/** The default channel compression algorithm. It'll be used in the absence of
* call specific settings. This option corresponds to the channel argument key
* behind \a GRPC_COMPRESSION_CHANNEL_DEFAULT_ALGORITHM. */
struct {
bool is_set;
grpc_compression_algorithm algorithm;
} default_algorithm;
} grpc_compression_options;
#ifdef __cplusplus
}
#endif
#endif /* GRPC_IMPL_CODEGEN_COMPRESSION_TYPES_H */
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