PolarDB-for-PostgreSQL

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/*
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 * contrib/btree_gist/btree_macaddr.c
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 */
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#include "postgres.h"
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#include "btree_gist.h"
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#include "btree_utils_num.h"
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#include "utils/builtins.h"
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#include "utils/inet.h"
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typedef struct
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{
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	macaddr		lower;
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	macaddr		upper;
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	char		pad[4];			/* make struct size = sizeof(gbtreekey16) */
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} macKEY;
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/*
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** OID ops
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*/
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PG_FUNCTION_INFO_V1(gbt_macad_compress);
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PG_FUNCTION_INFO_V1(gbt_macad_fetch);
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PG_FUNCTION_INFO_V1(gbt_macad_union);
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PG_FUNCTION_INFO_V1(gbt_macad_picksplit);
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PG_FUNCTION_INFO_V1(gbt_macad_consistent);
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PG_FUNCTION_INFO_V1(gbt_macad_penalty);
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PG_FUNCTION_INFO_V1(gbt_macad_same);
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static bool
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gbt_macadgt(const void *a, const void *b, FmgrInfo *flinfo)
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{
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	return DatumGetBool(DirectFunctionCall2(macaddr_gt, PointerGetDatum(a), PointerGetDatum(b)));
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}
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static bool
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gbt_macadge(const void *a, const void *b, FmgrInfo *flinfo)
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{
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	return DatumGetBool(DirectFunctionCall2(macaddr_ge, PointerGetDatum(a), PointerGetDatum(b)));
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}
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static bool
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gbt_macadeq(const void *a, const void *b, FmgrInfo *flinfo)
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{
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	return DatumGetBool(DirectFunctionCall2(macaddr_eq, PointerGetDatum(a), PointerGetDatum(b)));
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}
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static bool
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gbt_macadle(const void *a, const void *b, FmgrInfo *flinfo)
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{
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	return DatumGetBool(DirectFunctionCall2(macaddr_le, PointerGetDatum(a), PointerGetDatum(b)));
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}
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static bool
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gbt_macadlt(const void *a, const void *b, FmgrInfo *flinfo)
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{
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	return DatumGetBool(DirectFunctionCall2(macaddr_lt, PointerGetDatum(a), PointerGetDatum(b)));
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}
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static int
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gbt_macadkey_cmp(const void *a, const void *b, FmgrInfo *flinfo)
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{
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	macKEY	   *ia = (macKEY *) (((const Nsrt *) a)->t);
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	macKEY	   *ib = (macKEY *) (((const Nsrt *) b)->t);
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	int			res;
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	res = DatumGetInt32(DirectFunctionCall2(macaddr_cmp, MacaddrPGetDatum(&ia->lower), MacaddrPGetDatum(&ib->lower)));
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	if (res == 0)
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		return DatumGetInt32(DirectFunctionCall2(macaddr_cmp, MacaddrPGetDatum(&ia->upper), MacaddrPGetDatum(&ib->upper)));
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	return res;
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}
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static const gbtree_ninfo tinfo =
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{
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	gbt_t_macad,
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	sizeof(macaddr),
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	16,							/* sizeof(gbtreekey16) */
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	gbt_macadgt,
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	gbt_macadge,
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	gbt_macadeq,
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	gbt_macadle,
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	gbt_macadlt,
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	gbt_macadkey_cmp,
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	NULL
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};
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/**************************************************
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 * macaddr ops
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 **************************************************/
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static uint64
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mac_2_uint64(macaddr *m)
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{
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	unsigned char *mi = (unsigned char *) m;
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	uint64		res = 0;
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	int			i;
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	for (i = 0; i < 6; i++)
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		res += (((uint64) mi[i]) << ((uint64) ((5 - i) * 8)));
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	return res;
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}
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Datum
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gbt_macad_compress(PG_FUNCTION_ARGS)
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{
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	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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	PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
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}
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Datum
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gbt_macad_fetch(PG_FUNCTION_ARGS)
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{
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	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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	PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
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}
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Datum
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gbt_macad_consistent(PG_FUNCTION_ARGS)
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{
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	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
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	macaddr    *query = (macaddr *) PG_GETARG_POINTER(1);
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	StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
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	/* Oid		subtype = PG_GETARG_OID(3); */
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	bool	   *recheck = (bool *) PG_GETARG_POINTER(4);
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	macKEY	   *kkk = (macKEY *) DatumGetPointer(entry->key);
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	GBT_NUMKEY_R key;
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	/* All cases served by this function are exact */
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	*recheck = false;
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	key.lower = (GBT_NUMKEY *) &kkk->lower;
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	key.upper = (GBT_NUMKEY *) &kkk->upper;
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	PG_RETURN_BOOL(
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				   gbt_num_consistent(&key, (void *) query, &strategy, GIST_LEAF(entry), &tinfo, fcinfo->flinfo)
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		);
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}
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Datum
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gbt_macad_union(PG_FUNCTION_ARGS)
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{
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	GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
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	void	   *out = palloc0(sizeof(macKEY));
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	*(int *) PG_GETARG_POINTER(1) = sizeof(macKEY);
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	PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo, fcinfo->flinfo));
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}
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Datum
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gbt_macad_penalty(PG_FUNCTION_ARGS)
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{
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	macKEY	   *origentry = (macKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
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	macKEY	   *newentry = (macKEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
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	float	   *result = (float *) PG_GETARG_POINTER(2);
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	uint64		iorg[2],
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				inew[2];
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	iorg[0] = mac_2_uint64(&origentry->lower);
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	iorg[1] = mac_2_uint64(&origentry->upper);
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	inew[0] = mac_2_uint64(&newentry->lower);
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	inew[1] = mac_2_uint64(&newentry->upper);
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	penalty_num(result, iorg[0], iorg[1], inew[0], inew[1]);
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	PG_RETURN_POINTER(result);
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}
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Datum
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gbt_macad_picksplit(PG_FUNCTION_ARGS)
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{
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	PG_RETURN_POINTER(gbt_num_picksplit(
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										(GistEntryVector *) PG_GETARG_POINTER(0),
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										(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
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										&tinfo, fcinfo->flinfo
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										));
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}
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Datum
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gbt_macad_same(PG_FUNCTION_ARGS)
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{
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	macKEY	   *b1 = (macKEY *) PG_GETARG_POINTER(0);
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	macKEY	   *b2 = (macKEY *) PG_GETARG_POINTER(1);
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	bool	   *result = (bool *) PG_GETARG_POINTER(2);
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	*result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
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	PG_RETURN_POINTER(result);
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}
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