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-rw-r--r--contrib/btree_gist/btree_int2.c216
1 files changed, 216 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_int2.c b/contrib/btree_gist/btree_int2.c
new file mode 100644
index 0000000..a91b95f
--- /dev/null
+++ b/contrib/btree_gist/btree_int2.c
@@ -0,0 +1,216 @@
+/*
+ * contrib/btree_gist/btree_int2.c
+ */
+#include "postgres.h"
+
+#include "btree_gist.h"
+#include "btree_utils_num.h"
+#include "common/int.h"
+
+typedef struct int16key
+{
+ int16 lower;
+ int16 upper;
+} int16KEY;
+
+/*
+** int16 ops
+*/
+PG_FUNCTION_INFO_V1(gbt_int2_compress);
+PG_FUNCTION_INFO_V1(gbt_int2_fetch);
+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, FmgrInfo *flinfo)
+{
+ return (*((const int16 *) a) > *((const int16 *) b));
+}
+static bool
+gbt_int2ge(const void *a, const void *b, FmgrInfo *flinfo)
+{
+ return (*((const int16 *) a) >= *((const int16 *) b));
+}
+static bool
+gbt_int2eq(const void *a, const void *b, FmgrInfo *flinfo)
+{
+ return (*((const int16 *) a) == *((const int16 *) b));
+}
+static bool
+gbt_int2le(const void *a, const void *b, FmgrInfo *flinfo)
+{
+ return (*((const int16 *) a) <= *((const int16 *) b));
+}
+static bool
+gbt_int2lt(const void *a, const void *b, FmgrInfo *flinfo)
+{
+ return (*((const int16 *) a) < *((const int16 *) b));
+}
+
+static int
+gbt_int2key_cmp(const void *a, const void *b, FmgrInfo *flinfo)
+{
+ 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, FmgrInfo *flinfo)
+{
+ return GET_FLOAT_DISTANCE(int16, a, b);
+}
+
+
+static const gbtree_ninfo tinfo =
+{
+ gbt_t_int2,
+ sizeof(int16),
+ 4, /* sizeof(gbtreekey4) */
+ 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;
+
+ if (pg_sub_s16_overflow(a, b, &r) ||
+ r == PG_INT16_MIN)
+ ereport(ERROR,
+ (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
+ errmsg("smallint out of range")));
+
+ ra = Abs(r);
+
+ PG_RETURN_INT16(ra);
+}
+
+
+/**************************************************
+ * int16 ops
+ **************************************************/
+
+
+Datum
+gbt_int2_compress(PG_FUNCTION_ARGS)
+{
+ GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+
+ PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
+}
+
+Datum
+gbt_int2_fetch(PG_FUNCTION_ARGS)
+{
+ GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+
+ PG_RETURN_POINTER(gbt_num_fetch(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, fcinfo->flinfo));
+}
+
+
+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, fcinfo->flinfo));
+}
+
+
+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, fcinfo->flinfo));
+}
+
+
+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, fcinfo->flinfo));
+}
+
+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, fcinfo->flinfo);
+ PG_RETURN_POINTER(result);
+}