36 lines
1.2 KiB
C
36 lines
1.2 KiB
C
#ifndef __GMS_COMPRESS__
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#define __GMS_COMPRESS__
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#include "postgres.h"
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#define GZIP_COMPRESS_EXTRA_LENGTH 18
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#define GZIP_MIN_LENGTH 14
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#define GZIP_HEADER_1 ((unsigned char)0x1f)
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#define GZIP_HEADER_2 ((unsigned char)0x8b)
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#define UTLCOMP_MAX_HANDLE 5
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typedef struct gms_context {
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void *uncompressed_data; /* data to be compressed */
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void *compressed_data; /* data after compressed or data to be uncompressed */
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int2 compress_level; /* 0 for uncompress, 1~9 for compress */
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bool used;
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} gms_context;
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typedef struct gms_compress_context {
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gms_context context[UTLCOMP_MAX_HANDLE];
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} gms_compress_context;
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extern "C" Datum gms_lz_compress(PG_FUNCTION_ARGS);
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extern "C" Datum gms_lz_uncompress(PG_FUNCTION_ARGS);
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extern "C" Datum gms_lz_compress_open(PG_FUNCTION_ARGS);
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extern "C" Datum gms_lz_compress_close(PG_FUNCTION_ARGS);
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extern "C" Datum gms_lz_compress_add(PG_FUNCTION_ARGS);
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extern "C" Datum gms_lz_uncompress_open(PG_FUNCTION_ARGS);
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extern "C" Datum gms_lz_uncompress_close(PG_FUNCTION_ARGS);
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extern "C" Datum gms_lz_uncompress_extract(PG_FUNCTION_ARGS);
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extern "C" Datum gms_isopen(PG_FUNCTION_ARGS);
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extern "C" void set_extension_index(uint32 index);
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extern "C" void init_session_vars(void);
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#endif // __GMS_COMPRESS__
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