Gecko [ goons4good.org ]

Name	Size	Permission	Date
acl.h	12.79 KB	-rw-r--r--	2021-06-15 13:00
array.h	10.68 KB	-rw-r--r--	2021-06-15 13:00
ascii.h	579 B	-rw-r--r--	2021-06-15 13:00
attoptcache.h	725 B	-rw-r--r--	2021-06-15 13:00
builtins.h	47.77 KB	-rw-r--r--	2021-06-15 13:00
bytea.h	1.58 KB	-rw-r--r--	2021-06-15 13:00
cash.h	2.07 KB	-rw-r--r--	2021-06-15 13:00
catcache.h	7.51 KB	-rw-r--r--	2021-06-15 13:00
combocid.h	698 B	-rw-r--r--	2021-06-15 13:00
date.h	7.73 KB	-rw-r--r--	2021-06-15 13:00
datetime.h	9.92 KB	-rw-r--r--	2021-06-15 13:00
datum.h	1.48 KB	-rw-r--r--	2021-06-15 13:00
dynahash.h	498 B	-rw-r--r--	2021-06-15 13:00
dynamic_loader.h	648 B	-rw-r--r--	2021-06-15 13:00
elog.h	12.56 KB	-rw-r--r--	2021-06-15 13:00
errcodes.h	19.61 KB	-rw-r--r--	2021-06-15 13:00
fmgroids.h	61.09 KB	-rw-r--r--	2021-06-15 13:00
fmgrtab.h	1.15 KB	-rw-r--r--	2021-06-15 13:00
formatting.h	1.41 KB	-rw-r--r--	2021-06-15 13:00
geo_decls.h	15.86 KB	-rw-r--r--	2021-06-15 13:00
guc.h	13.19 KB	-rw-r--r--	2021-06-15 13:00
guc_tables.h	7.15 KB	-rw-r--r--	2021-06-15 13:00
help_config.h	432 B	-rw-r--r--	2021-06-15 13:00
hsearch.h	5.51 KB	-rw-r--r--	2021-06-15 13:00
inet.h	2.66 KB	-rw-r--r--	2021-06-15 13:00
int8.h	4.03 KB	-rw-r--r--	2021-06-15 13:00
inval.h	1.81 KB	-rw-r--r--	2021-06-15 13:00
json.h	916 B	-rw-r--r--	2021-06-15 13:00
logtape.h	1.5 KB	-rw-r--r--	2021-06-15 13:00
lsyscache.h	6.51 KB	-rw-r--r--	2021-06-15 13:00
memutils.h	5.2 KB	-rw-r--r--	2021-06-15 13:00
nabstime.h	5.79 KB	-rw-r--r--	2021-06-15 13:00
numeric.h	1.88 KB	-rw-r--r--	2021-06-15 13:00
palloc.h	3.92 KB	-rw-r--r--	2021-06-15 13:00
pg_crc.h	4.36 KB	-rw-r--r--	2021-06-15 13:00
pg_crc_tables.h	19.73 KB	-rw-r--r--	2021-06-15 13:00
pg_locale.h	2.59 KB	-rw-r--r--	2021-06-15 13:00
pg_lzcompress.h	2.97 KB	-rw-r--r--	2021-06-15 13:00
pg_rusage.h	847 B	-rw-r--r--	2021-06-15 13:00
plancache.h	8.02 KB	-rw-r--r--	2021-06-15 13:00
portal.h	9.22 KB	-rw-r--r--	2021-06-15 13:00
probes.h	37.93 KB	-rw-r--r--	2021-06-15 13:00
ps_status.h	668 B	-rw-r--r--	2021-06-15 13:00
rangetypes.h	7.4 KB	-rw-r--r--	2021-06-15 13:00
rbtree.h	2.26 KB	-rw-r--r--	2021-06-15 13:00
rel.h	12.27 KB	-rw-r--r--	2021-06-15 13:00
relcache.h	3.17 KB	-rw-r--r--	2021-06-15 13:00
relmapper.h	1.68 KB	-rw-r--r--	2021-06-15 13:00
reltrigger.h	1.95 KB	-rw-r--r--	2021-06-15 13:00
resowner.h	5.07 KB	-rw-r--r--	2021-06-15 13:00
selfuncs.h	7.5 KB	-rw-r--r--	2021-06-15 13:00
snapmgr.h	1.59 KB	-rw-r--r--	2021-06-15 13:00
snapshot.h	2.59 KB	-rw-r--r--	2021-06-15 13:00
sortsupport.h	5.3 KB	-rw-r--r--	2021-06-15 13:00
spccache.h	556 B	-rw-r--r--	2021-06-15 13:00
syscache.h	5.51 KB	-rw-r--r--	2021-06-15 13:00
timestamp.h	9.5 KB	-rw-r--r--	2021-06-15 13:00
tqual.h	3.5 KB	-rw-r--r--	2021-06-15 13:00
tuplesort.h	4.62 KB	-rw-r--r--	2021-06-15 13:00
tuplestore.h	3.14 KB	-rw-r--r--	2021-06-15 13:00
typcache.h	4.26 KB	-rw-r--r--	2021-06-15 13:00
tzparser.h	1.13 KB	-rw-r--r--	2021-06-15 13:00
uuid.h	861 B	-rw-r--r--	2021-06-15 13:00
varbit.h	4.27 KB	-rw-r--r--	2021-06-15 13:00
xml.h	3.89 KB	-rw-r--r--	2021-06-15 13:00

Rename

/* ----------
 * pg_lzcompress.h -
 *
 *	Definitions for the builtin LZ compressor
 *
 * src/include/utils/pg_lzcompress.h
 * ----------
 */

#ifndef _PG_LZCOMPRESS_H_
#define _PG_LZCOMPRESS_H_

/* ----------
 * PGLZ_Header -
 *
 *		The information at the start of the compressed data.
 * ----------
 */
typedef struct PGLZ_Header
{
	int32		vl_len_;		/* varlena header (do not touch directly!) */
	int32		rawsize;
} PGLZ_Header;

/* ----------
 * PGLZ_MAX_OUTPUT -
 *
 *		Macro to compute the buffer size required by pglz_compress().
 *		We allow 4 bytes for overrun before detecting compression failure.
 * ----------
 */
#define PGLZ_MAX_OUTPUT(_dlen)			((_dlen) + 4 + sizeof(PGLZ_Header))

/* ----------
 * PGLZ_RAW_SIZE -
 *
 *		Macro to determine the uncompressed data size contained
 *		in the entry.
 * ----------
 */
#define PGLZ_RAW_SIZE(_lzdata)			((_lzdata)->rawsize)

/* ----------
 * PGLZ_Strategy -
 *
 *		Some values that control the compression algorithm.
 *
 *		min_input_size		Minimum input data size to consider compression.
 *
 *		max_input_size		Maximum input data size to consider compression.
 *
 *		min_comp_rate		Minimum compression rate (0-99%) to require.
 *							Regardless of min_comp_rate, the output must be
 *							smaller than the input, else we don't store
 *							compressed.
 *
 *		first_success_by	Abandon compression if we find no compressible
 *							data within the first this-many bytes.
 *
 *		match_size_good		The initial GOOD match size when starting history
 *							lookup. When looking up the history to find a
 *							match that could be expressed as a tag, the
 *							algorithm does not always walk back entirely.
 *							A good match fast is usually better than the
 *							best possible one very late. For each iteration
 *							in the lookup, this value is lowered so the
 *							longer the lookup takes, the smaller matches
 *							are considered good.
 *
 *		match_size_drop		The percentage by which match_size_good is lowered
 *							after each history check. Allowed values are
 *							0 (no change until end) to 100 (only check
 *							latest history entry at all).
 * ----------
 */
typedef struct PGLZ_Strategy
{
	int32		min_input_size;
	int32		max_input_size;
	int32		min_comp_rate;
	int32		first_success_by;
	int32		match_size_good;
	int32		match_size_drop;
} PGLZ_Strategy;

/* ----------
 * The standard strategies
 *
 *		PGLZ_strategy_default		Recommended default strategy for TOAST.
 *
 *		PGLZ_strategy_always		Try to compress inputs of any length.
 *									Fallback to uncompressed storage only if
 *									output would be larger than input.
 * ----------
 */
extern const PGLZ_Strategy *const PGLZ_strategy_default;
extern const PGLZ_Strategy *const PGLZ_strategy_always;

/* ----------
 * Global function declarations
 * ----------
 */
extern bool pglz_compress(const char *source, int32 slen, PGLZ_Header *dest,
			  const PGLZ_Strategy *strategy);
extern void pglz_decompress(const PGLZ_Header *source, char *dest);

#endif   /* _PG_LZCOMPRESS_H_ */