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