contrib/btree_gist/btree_int4.c

   1 /*
   2  * contrib/btree_gist/btree_int4.c
   3  */
   4 #include "btree_gist.h"
   5 #include "btree_utils_num.h"
   6
   7 typedef struct int32key
   8 {
   9         int32           lower;
  10         int32           upper;
  11 } int32KEY;
  12
  13 /*
  14 ** int32 ops
  15 */
  16 PG_FUNCTION_INFO_V1(gbt_int4_compress);
  17 PG_FUNCTION_INFO_V1(gbt_int4_union);
  18 PG_FUNCTION_INFO_V1(gbt_int4_picksplit);
  19 PG_FUNCTION_INFO_V1(gbt_int4_consistent);
  20 PG_FUNCTION_INFO_V1(gbt_int4_distance);
  21 PG_FUNCTION_INFO_V1(gbt_int4_penalty);
  22 PG_FUNCTION_INFO_V1(gbt_int4_same);
  23
  24 Datum           gbt_int4_compress(PG_FUNCTION_ARGS);
  25 Datum           gbt_int4_union(PG_FUNCTION_ARGS);
  26 Datum           gbt_int4_picksplit(PG_FUNCTION_ARGS);
  27 Datum           gbt_int4_consistent(PG_FUNCTION_ARGS);
  28 Datum           gbt_int4_distance(PG_FUNCTION_ARGS);
  29 Datum           gbt_int4_penalty(PG_FUNCTION_ARGS);
  30 Datum           gbt_int4_same(PG_FUNCTION_ARGS);
  31
  32
  33 static bool
  34 gbt_int4gt(const void *a, const void *b)
  35 {
  36         return (*((int32 *) a) > *((int32 *) b));
  37 }
  38 static bool
  39 gbt_int4ge(const void *a, const void *b)
  40 {
  41         return (*((int32 *) a) >= *((int32 *) b));
  42 }
  43 static bool
  44 gbt_int4eq(const void *a, const void *b)
  45 {
  46         return (*((int32 *) a) == *((int32 *) b));
  47 }
  48 static bool
  49 gbt_int4le(const void *a, const void *b)
  50 {
  51         return (*((int32 *) a) <= *((int32 *) b));
  52 }
  53 static bool
  54 gbt_int4lt(const void *a, const void *b)
  55 {
  56         return (*((int32 *) a) < *((int32 *) b));
  57 }
  58
  59 static int
  60 gbt_int4key_cmp(const void *a, const void *b)
  61 {
  62         int32KEY   *ia = (int32KEY *) (((Nsrt *) a)->t);
  63         int32KEY   *ib = (int32KEY *) (((Nsrt *) b)->t);
  64
  65         if (ia->lower == ib->lower)
  66         {
  67                 if (ia->upper == ib->upper)
  68                         return 0;
  69
  70                 return (ia->upper > ib->upper) ? 1 : -1;
  71         }
  72
  73         return (ia->lower > ib->lower) ? 1 : -1;
  74 }
  75
  76 static float8
  77 gbt_int4_dist(const void *a, const void *b)
  78 {
  79         return GET_FLOAT_DISTANCE(int4, a, b);
  80 }
  81
  82
  83 static const gbtree_ninfo tinfo =
  84 {
  85         gbt_t_int4,
  86         sizeof(int32),
  87         gbt_int4gt,
  88         gbt_int4ge,
  89         gbt_int4eq,
  90         gbt_int4le,
  91         gbt_int4lt,
  92         gbt_int4key_cmp,
  93         gbt_int4_dist
  94 };
  95
  96
  97 PG_FUNCTION_INFO_V1(int4_dist);
  98 Datum           int4_dist(PG_FUNCTION_ARGS);
  99 Datum
 100 int4_dist(PG_FUNCTION_ARGS)
 101 {
 102         int4            a = PG_GETARG_INT32(0);
 103         int4            b = PG_GETARG_INT32(1);
 104         int4            r;
 105         int4            ra;
 106
 107         r = a - b;
 108         ra = Abs(r);
 109
 110         /* Overflow check. */
 111         if (ra < 0 || (!SAMESIGN(a, b) && !SAMESIGN(r, a)))
 112                 ereport(ERROR,
 113                                 (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
 114                                  errmsg("integer out of range")));
 115
 116         PG_RETURN_INT32(ra);
 117 }
 118
 119
 120 /**************************************************
 121  * int32 ops
 122  **************************************************/
 123
 124
 125 Datum
 126 gbt_int4_compress(PG_FUNCTION_ARGS)
 127 {
 128         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 129         GISTENTRY  *retval = NULL;
 130
 131         PG_RETURN_POINTER(gbt_num_compress(retval, entry, &tinfo));
 132 }
 133
 134
 135 Datum
 136 gbt_int4_consistent(PG_FUNCTION_ARGS)
 137 {
 138         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 139         int32           query = PG_GETARG_INT32(1);
 140         StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
 141
 142         /* Oid          subtype = PG_GETARG_OID(3); */
 143         bool       *recheck = (bool *) PG_GETARG_POINTER(4);
 144         int32KEY   *kkk = (int32KEY *) DatumGetPointer(entry->key);
 145         GBT_NUMKEY_R key;
 146
 147         /* All cases served by this function are exact */
 148         *recheck = false;
 149
 150         key.lower = (GBT_NUMKEY *) &kkk->lower;
 151         key.upper = (GBT_NUMKEY *) &kkk->upper;
 152
 153         PG_RETURN_BOOL(
 154                                    gbt_num_consistent(&key, (void *) &query, &strategy, GIST_LEAF(entry), &tinfo)
 155                 );
 156 }
 157
 158
 159 Datum
 160 gbt_int4_distance(PG_FUNCTION_ARGS)
 161 {
 162         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 163         int32           query = PG_GETARG_INT32(1);
 164
 165         /* Oid          subtype = PG_GETARG_OID(3); */
 166         int32KEY   *kkk = (int32KEY *) DatumGetPointer(entry->key);
 167         GBT_NUMKEY_R key;
 168
 169         key.lower = (GBT_NUMKEY *) &kkk->lower;
 170         key.upper = (GBT_NUMKEY *) &kkk->upper;
 171
 172         PG_RETURN_FLOAT8(
 173                         gbt_num_distance(&key, (void *) &query, GIST_LEAF(entry), &tinfo)
 174                 );
 175 }
 176
 177
 178 Datum
 179 gbt_int4_union(PG_FUNCTION_ARGS)
 180 {
 181         GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
 182         void       *out = palloc(sizeof(int32KEY));
 183
 184         *(int *) PG_GETARG_POINTER(1) = sizeof(int32KEY);
 185         PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo));
 186 }
 187
 188
 189 Datum
 190 gbt_int4_penalty(PG_FUNCTION_ARGS)
 191 {
 192         int32KEY   *origentry = (int32KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
 193         int32KEY   *newentry = (int32KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
 194         float      *result = (float *) PG_GETARG_POINTER(2);
 195
 196         penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper);
 197
 198         PG_RETURN_POINTER(result);
 199 }
 200
 201 Datum
 202 gbt_int4_picksplit(PG_FUNCTION_ARGS)
 203 {
 204         PG_RETURN_POINTER(gbt_num_picksplit(
 205                                                                         (GistEntryVector *) PG_GETARG_POINTER(0),
 206                                                                           (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
 207                                                                                 &tinfo
 208                                                                                 ));
 209 }
 210
 211 Datum
 212 gbt_int4_same(PG_FUNCTION_ARGS)
 213 {
 214         int32KEY   *b1 = (int32KEY *) PG_GETARG_POINTER(0);
 215         int32KEY   *b2 = (int32KEY *) PG_GETARG_POINTER(1);
 216         bool       *result = (bool *) PG_GETARG_POINTER(2);
 217
 218         *result = gbt_num_same((void *) b1, (void *) b2, &tinfo);
 219         PG_RETURN_POINTER(result);
 220 }