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📄 acl.h(12.79 KB)
📄 array.h(10.61 KB)
📄 ascii.h(579 B)
📄 attoptcache.h(725 B)
📄 builtins.h(47.77 KB)
📄 bytea.h(1.58 KB)
📄 cash.h(2.07 KB)
📄 catcache.h(7.51 KB)
📄 combocid.h(698 B)
📄 date.h(7.73 KB)
📄 datetime.h(9.92 KB)
📄 datum.h(1.48 KB)
📄 dynahash.h(498 B)
📄 dynamic_loader.h(648 B)
📄 elog.h(12.56 KB)
📄 errcodes.h(19.61 KB)
📄 fmgroids.h(61.09 KB)
📄 fmgrtab.h(1.15 KB)
📄 formatting.h(1.41 KB)
📄 geo_decls.h(15.86 KB)
📄 guc.h(13.19 KB)
📄 guc_tables.h(7.15 KB)
📄 help_config.h(432 B)
📄 hsearch.h(5.51 KB)
📄 inet.h(2.66 KB)
📄 int8.h(4.03 KB)
📄 inval.h(1.81 KB)
📄 json.h(916 B)
📄 logtape.h(1.5 KB)
📄 lsyscache.h(6.51 KB)
📄 memutils.h(5.2 KB)
📄 nabstime.h(5.79 KB)
📄 numeric.h(1.88 KB)
📄 palloc.h(3.92 KB)
📄 pg_crc.h(4.36 KB)
📄 pg_crc_tables.h(19.73 KB)
📄 pg_locale.h(2.59 KB)
📄 pg_lzcompress.h(2.97 KB)
📄 pg_rusage.h(847 B)
📄 plancache.h(8.02 KB)
📄 portal.h(9.22 KB)
📄 probes.h(37.93 KB)
📄 ps_status.h(668 B)
📄 rangetypes.h(7.4 KB)
📄 rbtree.h(2.26 KB)
📄 rel.h(12.27 KB)
📄 relcache.h(3.17 KB)
📄 relmapper.h(1.68 KB)
📄 reltrigger.h(1.95 KB)
📄 resowner.h(5.07 KB)
📄 selfuncs.h(7.5 KB)
📄 snapmgr.h(1.59 KB)
📄 snapshot.h(2.59 KB)
📄 sortsupport.h(5.3 KB)
📄 spccache.h(556 B)
📄 syscache.h(5.51 KB)
📄 timestamp.h(9.5 KB)
📄 tqual.h(3.5 KB)
📄 tuplesort.h(4.62 KB)
📄 tuplestore.h(3.14 KB)
📄 typcache.h(4.26 KB)
📄 tzparser.h(1.13 KB)
📄 uuid.h(861 B)
📄 varbit.h(4.27 KB)
📄 xml.h(3.89 KB)

Editing: hsearch.h

/*-------------------------------------------------------------------------
 *
 * hsearch.h
 *	  exported definitions for utils/hash/dynahash.c; see notes therein
 *
 *
 * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/utils/hsearch.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef HSEARCH_H
#define HSEARCH_H

/*
 * Hash functions must have this signature.
 */
typedef uint32 (*HashValueFunc) (const void *key, Size keysize);

/*
 * Key comparison functions must have this signature.  Comparison functions
 * return zero for match, nonzero for no match.  (The comparison function
 * definition is designed to allow memcmp() and strncmp() to be used directly
 * as key comparison functions.)
 */
typedef int (*HashCompareFunc) (const void *key1, const void *key2,
											Size keysize);

/*
 * Key copying functions must have this signature.  The return value is not
 * used.  (The definition is set up to allow memcpy() and strncpy() to be
 * used directly.)
 */
typedef void *(*HashCopyFunc) (void *dest, const void *src, Size keysize);

/*
 * Space allocation function for a hashtable --- designed to match malloc().
 * Note: there is no free function API; can't destroy a hashtable unless you
 * use the default allocator.
 */
typedef void *(*HashAllocFunc) (Size request);

/*
 * HASHELEMENT is the private part of a hashtable entry.  The caller's data
 * follows the HASHELEMENT structure (on a MAXALIGN'd boundary).  The hash key
 * is expected to be at the start of the caller's hash entry data structure.
 */
typedef struct HASHELEMENT
{
	struct HASHELEMENT *link;	/* link to next entry in same bucket */
	uint32		hashvalue;		/* hash function result for this entry */
} HASHELEMENT;

/* Hash table header struct is an opaque type known only within dynahash.c */
typedef struct HASHHDR HASHHDR;

/* Hash table control struct is an opaque type known only within dynahash.c */
typedef struct HTAB HTAB;

/* Parameter data structure for hash_create */
/* Only those fields indicated by hash_flags need be set */
typedef struct HASHCTL
{
	long		num_partitions; /* # partitions (must be power of 2) */
	long		ssize;			/* segment size */
	long		dsize;			/* (initial) directory size */
	long		max_dsize;		/* limit to dsize if dir size is limited */
	long		ffactor;		/* fill factor */
	Size		keysize;		/* hash key length in bytes */
	Size		entrysize;		/* total user element size in bytes */
	HashValueFunc hash;			/* hash function */
	HashCompareFunc match;		/* key comparison function */
	HashCopyFunc keycopy;		/* key copying function */
	HashAllocFunc alloc;		/* memory allocator */
	MemoryContext hcxt;			/* memory context to use for allocations */
	HASHHDR    *hctl;			/* location of header in shared mem */
} HASHCTL;

/* Flags to indicate which parameters are supplied */
#define HASH_PARTITION	0x001	/* Hashtable is used w/partitioned locking */
#define HASH_SEGMENT	0x002	/* Set segment size */
#define HASH_DIRSIZE	0x004	/* Set directory size (initial and max) */
#define HASH_FFACTOR	0x008	/* Set fill factor */
#define HASH_FUNCTION	0x010	/* Set user defined hash function */
#define HASH_ELEM		0x020	/* Set keysize and entrysize */
#define HASH_SHARED_MEM 0x040	/* Hashtable is in shared memory */
#define HASH_ATTACH		0x080	/* Do not initialize hctl */
#define HASH_ALLOC		0x100	/* Set memory allocator */
#define HASH_CONTEXT	0x200	/* Set memory allocation context */
#define HASH_COMPARE	0x400	/* Set user defined comparison function */
#define HASH_KEYCOPY	0x800	/* Set user defined key-copying function */
#define HASH_FIXED_SIZE 0x1000	/* Initial size is a hard limit */

/* max_dsize value to indicate expansible directory */
#define NO_MAX_DSIZE			(-1)

/* hash_search operations */
typedef enum
{
	HASH_FIND,
	HASH_ENTER,
	HASH_REMOVE,
	HASH_ENTER_NULL
} HASHACTION;

/* hash_seq status (should be considered an opaque type by callers) */
typedef struct
{
	HTAB	   *hashp;
	uint32		curBucket;		/* index of current bucket */
	HASHELEMENT *curEntry;		/* current entry in bucket */
} HASH_SEQ_STATUS;

/*
 * prototypes for functions in dynahash.c
 */
extern HTAB *hash_create(const char *tabname, long nelem,
			HASHCTL *info, int flags);
extern void hash_destroy(HTAB *hashp);
extern void hash_stats(const char *where, HTAB *hashp);
extern void *hash_search(HTAB *hashp, const void *keyPtr, HASHACTION action,
			bool *foundPtr);
extern uint32 get_hash_value(HTAB *hashp, const void *keyPtr);
extern void *hash_search_with_hash_value(HTAB *hashp, const void *keyPtr,
							uint32 hashvalue, HASHACTION action,
							bool *foundPtr);
extern long hash_get_num_entries(HTAB *hashp);
extern void hash_seq_init(HASH_SEQ_STATUS *status, HTAB *hashp);
extern void *hash_seq_search(HASH_SEQ_STATUS *status);
extern void hash_seq_term(HASH_SEQ_STATUS *status);
extern void hash_freeze(HTAB *hashp);
extern Size hash_estimate_size(long num_entries, Size entrysize);
extern long hash_select_dirsize(long num_entries);
extern Size hash_get_shared_size(HASHCTL *info, int flags);
extern void AtEOXact_HashTables(bool isCommit);
extern void AtEOSubXact_HashTables(bool isCommit, int nestDepth);

/*
 * prototypes for functions in hashfn.c
 */
extern uint32 string_hash(const void *key, Size keysize);
extern uint32 tag_hash(const void *key, Size keysize);
extern uint32 oid_hash(const void *key, Size keysize);
extern uint32 bitmap_hash(const void *key, Size keysize);
extern int	bitmap_match(const void *key1, const void *key2, Size keysize);

#endif   /* HSEARCH_H */

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Editing: hsearch.h

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