src/include/storage/gp_compress.h

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
/*
 * gp_compress.h
 *      gpdb compression utilities.
 *
 */

#ifndef GP_COMPRESS_H
#define GP_COMPRESS_H

#include "fmgr.h"

#include "catalog/pg_compression.h"

#ifdef HAVE_LIBZ
#include <zlib.h>
#endif

extern int gp_trycompress_new(
		 uint8			*sourceData,
		 int32			 sourceLen,
		 uint8			*compressedBuffer,
		 int32			 compressedBufferWithOverrrunLen,
		 int32			 maxCompressedLen,	// The largest compressed result we would like to see.
		 int32			*compressedLen,
		 int				 compressLevel,
		 PGFunction	 compressor,
		 CompressionState *compressionState);


extern void gp_decompress_new(
				uint8			*compressed,
				int32			 compressedLen,
				uint8			*uncompressed,
				int32			 uncompressedLen,
			  PGFunction decompressor,
			  CompressionState *compressionState,
				int64			 bufferCount);

extern void gp_issuecompresserror(
	int				zlibCompressError,
	int32			sourceLen);

#endif