postgresql/contrib/btree_gist/btree_int2.c
Peter Eisentraut e7128e8dbb Create function prototype as part of PG_FUNCTION_INFO_V1 macro
Because of gcc -Wmissing-prototypes, all functions in dynamically
loadable modules must have a separate prototype declaration.  This is
meant to detect global functions that are not declared in header files,
but in cases where the function is called via dfmgr, this is redundant.
Besides filling up space with boilerplate, this is a frequent source of
compiler warnings in extension modules.

We can fix that by creating the function prototype as part of the
PG_FUNCTION_INFO_V1 macro, which such modules have to use anyway.  That
makes the code of modules cleaner, because there is one less place where
the entry points have to be listed, and creates an additional check that
functions have the right prototype.

Remove now redundant prototypes from contrib and other modules.
2014-04-18 00:03:19 -04:00

213 lines
4.5 KiB
C

/*
* contrib/btree_gist/btree_int2.c
*/
#include "postgres.h"
#include "btree_gist.h"
#include "btree_utils_num.h"
typedef struct int16key
{
int16 lower;
int16 upper;
} int16KEY;
/*
** int16 ops
*/
PG_FUNCTION_INFO_V1(gbt_int2_compress);
PG_FUNCTION_INFO_V1(gbt_int2_union);
PG_FUNCTION_INFO_V1(gbt_int2_picksplit);
PG_FUNCTION_INFO_V1(gbt_int2_consistent);
PG_FUNCTION_INFO_V1(gbt_int2_distance);
PG_FUNCTION_INFO_V1(gbt_int2_penalty);
PG_FUNCTION_INFO_V1(gbt_int2_same);
static bool
gbt_int2gt(const void *a, const void *b)
{
return (*((const int16 *) a) > *((const int16 *) b));
}
static bool
gbt_int2ge(const void *a, const void *b)
{
return (*((const int16 *) a) >= *((const int16 *) b));
}
static bool
gbt_int2eq(const void *a, const void *b)
{
return (*((const int16 *) a) == *((const int16 *) b));
}
static bool
gbt_int2le(const void *a, const void *b)
{
return (*((const int16 *) a) <= *((const int16 *) b));
}
static bool
gbt_int2lt(const void *a, const void *b)
{
return (*((const int16 *) a) < *((const int16 *) b));
}
static int
gbt_int2key_cmp(const void *a, const void *b)
{
int16KEY *ia = (int16KEY *) (((const Nsrt *) a)->t);
int16KEY *ib = (int16KEY *) (((const Nsrt *) b)->t);
if (ia->lower == ib->lower)
{
if (ia->upper == ib->upper)
return 0;
return (ia->upper > ib->upper) ? 1 : -1;
}
return (ia->lower > ib->lower) ? 1 : -1;
}
static float8
gbt_int2_dist(const void *a, const void *b)
{
return GET_FLOAT_DISTANCE(int16, a, b);
}
static const gbtree_ninfo tinfo =
{
gbt_t_int2,
sizeof(int16),
gbt_int2gt,
gbt_int2ge,
gbt_int2eq,
gbt_int2le,
gbt_int2lt,
gbt_int2key_cmp,
gbt_int2_dist
};
PG_FUNCTION_INFO_V1(int2_dist);
Datum
int2_dist(PG_FUNCTION_ARGS)
{
int16 a = PG_GETARG_INT16(0);
int16 b = PG_GETARG_INT16(1);
int16 r;
int16 ra;
r = a - b;
ra = Abs(r);
/* Overflow check. */
if (ra < 0 || (!SAMESIGN(a, b) && !SAMESIGN(r, a)))
ereport(ERROR,
(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("smallint out of range")));
PG_RETURN_INT16(ra);
}
/**************************************************
* int16 ops
**************************************************/
Datum
gbt_int2_compress(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
GISTENTRY *retval = NULL;
PG_RETURN_POINTER(gbt_num_compress(retval, entry, &tinfo));
}
Datum
gbt_int2_consistent(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
int16 query = PG_GETARG_INT16(1);
StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
/* Oid subtype = PG_GETARG_OID(3); */
bool *recheck = (bool *) PG_GETARG_POINTER(4);
int16KEY *kkk = (int16KEY *) DatumGetPointer(entry->key);
GBT_NUMKEY_R key;
/* All cases served by this function are exact */
*recheck = false;
key.lower = (GBT_NUMKEY *) &kkk->lower;
key.upper = (GBT_NUMKEY *) &kkk->upper;
PG_RETURN_BOOL(
gbt_num_consistent(&key, (void *) &query, &strategy, GIST_LEAF(entry), &tinfo)
);
}
Datum
gbt_int2_distance(PG_FUNCTION_ARGS)
{
GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
int16 query = PG_GETARG_INT16(1);
/* Oid subtype = PG_GETARG_OID(3); */
int16KEY *kkk = (int16KEY *) DatumGetPointer(entry->key);
GBT_NUMKEY_R key;
key.lower = (GBT_NUMKEY *) &kkk->lower;
key.upper = (GBT_NUMKEY *) &kkk->upper;
PG_RETURN_FLOAT8(
gbt_num_distance(&key, (void *) &query, GIST_LEAF(entry), &tinfo)
);
}
Datum
gbt_int2_union(PG_FUNCTION_ARGS)
{
GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
void *out = palloc(sizeof(int16KEY));
*(int *) PG_GETARG_POINTER(1) = sizeof(int16KEY);
PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo));
}
Datum
gbt_int2_penalty(PG_FUNCTION_ARGS)
{
int16KEY *origentry = (int16KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
int16KEY *newentry = (int16KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
float *result = (float *) PG_GETARG_POINTER(2);
penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper);
PG_RETURN_POINTER(result);
}
Datum
gbt_int2_picksplit(PG_FUNCTION_ARGS)
{
PG_RETURN_POINTER(gbt_num_picksplit(
(GistEntryVector *) PG_GETARG_POINTER(0),
(GIST_SPLITVEC *) PG_GETARG_POINTER(1),
&tinfo
));
}
Datum
gbt_int2_same(PG_FUNCTION_ARGS)
{
int16KEY *b1 = (int16KEY *) PG_GETARG_POINTER(0);
int16KEY *b2 = (int16KEY *) PG_GETARG_POINTER(1);
bool *result = (bool *) PG_GETARG_POINTER(2);
*result = gbt_num_same((void *) b1, (void *) b2, &tinfo);
PG_RETURN_POINTER(result);
}