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/*
* $PostgreSQL: pgsql/contrib/hstore/hstore.h,v 1.8 2009/06/11 14:48:51 momjian Exp $
*/
#ifndef __HSTORE_H__
#define __HSTORE_H__
#include "fmgr.h"
typedef struct
{
uint16 keylen;
uint16 vallen;
uint32
valisnull:1,
pos:31;
} HEntry;
/* these are determined by the sizes of the keylen and vallen fields */
/* in struct HEntry and struct Pairs */
#define HSTORE_MAX_KEY_LEN 65535
#define HSTORE_MAX_VALUE_LEN 65535
typedef struct
{
int32 vl_len_; /* varlena header (do not touch directly!) */
int4 size;
char data[1];
} HStore;
#define HSHRDSIZE (VARHDRSZ + sizeof(int4))
#define CALCDATASIZE(x, lenstr) ( (x) * sizeof(HEntry) + HSHRDSIZE + (lenstr) )
#define ARRPTR(x) ( (HEntry*) ( (char*)(x) + HSHRDSIZE ) )
#define STRPTR(x) ( (char*)(x) + HSHRDSIZE + ( sizeof(HEntry) * ((HStore*)x)->size ) )
#define PG_GETARG_HS(x) ((HStore*)PG_DETOAST_DATUM(PG_GETARG_DATUM(x)))
typedef struct
{
char *key;
char *val;
uint16 keylen;
uint16 vallen;
bool isnull;
bool needfree;
} Pairs;
int comparePairs(const void *a, const void *b);
int uniquePairs(Pairs *a, int4 l, int4 *buflen);
size_t hstoreCheckKeyLen(size_t len);
size_t hstoreCheckValLen(size_t len);
#define HStoreContainsStrategyNumber 7
#define HStoreExistsStrategyNumber 9
#endif /* __HSTORE_H__ */
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