contrib/btree_gist/btree_int4.c

   1 /*
   2  * contrib/btree_gist/btree_int4.c
   3  */
   4 #include "postgres.h"
   5
   6 #include "btree_gist.h"
   7 #include "btree_utils_num.h"
   8 #include "common/int.h"
   9
  10 typedef struct int32key
  11 {
  12         int32           lower;
  13         int32           upper;
  14 } int32KEY;
  15
  16 /*
  17 ** int32 ops
  18 */
  19 PG_FUNCTION_INFO_V1(gbt_int4_compress);
  20 PG_FUNCTION_INFO_V1(gbt_int4_fetch);
  21 PG_FUNCTION_INFO_V1(gbt_int4_union);
  22 PG_FUNCTION_INFO_V1(gbt_int4_picksplit);
  23 PG_FUNCTION_INFO_V1(gbt_int4_consistent);
  24 PG_FUNCTION_INFO_V1(gbt_int4_distance);
  25 PG_FUNCTION_INFO_V1(gbt_int4_penalty);
  26 PG_FUNCTION_INFO_V1(gbt_int4_same);
  27
  28
  29 static bool
  30 gbt_int4gt(const void *a, const void *b, FmgrInfo *flinfo)
  31 {
  32         return (*((const int32 *) a) > *((const int32 *) b));
  33 }
  34 static bool
  35 gbt_int4ge(const void *a, const void *b, FmgrInfo *flinfo)
  36 {
  37         return (*((const int32 *) a) >= *((const int32 *) b));
  38 }
  39 static bool
  40 gbt_int4eq(const void *a, const void *b, FmgrInfo *flinfo)
  41 {
  42         return (*((const int32 *) a) == *((const int32 *) b));
  43 }
  44 static bool
  45 gbt_int4le(const void *a, const void *b, FmgrInfo *flinfo)
  46 {
  47         return (*((const int32 *) a) <= *((const int32 *) b));
  48 }
  49 static bool
  50 gbt_int4lt(const void *a, const void *b, FmgrInfo *flinfo)
  51 {
  52         return (*((const int32 *) a) < *((const int32 *) b));
  53 }
  54
  55 static int
  56 gbt_int4key_cmp(const void *a, const void *b, FmgrInfo *flinfo)
  57 {
  58         int32KEY   *ia = (int32KEY *) (((const Nsrt *) a)->t);
  59         int32KEY   *ib = (int32KEY *) (((const Nsrt *) b)->t);
  60
  61         if (ia->lower == ib->lower)
  62         {
  63                 if (ia->upper == ib->upper)
  64                         return 0;
  65
  66                 return (ia->upper > ib->upper) ? 1 : -1;
  67         }
  68
  69         return (ia->lower > ib->lower) ? 1 : -1;
  70 }
  71
  72 static float8
  73 gbt_int4_dist(const void *a, const void *b, FmgrInfo *flinfo)
  74 {
  75         return GET_FLOAT_DISTANCE(int32, a, b);
  76 }
  77
  78
  79 static const gbtree_ninfo tinfo =
  80 {
  81         gbt_t_int4,
  82         sizeof(int32),
  83         8,                                                      /* sizeof(gbtreekey8) */
  84         gbt_int4gt,
  85         gbt_int4ge,
  86         gbt_int4eq,
  87         gbt_int4le,
  88         gbt_int4lt,
  89         gbt_int4key_cmp,
  90         gbt_int4_dist
  91 };
  92
  93
  94 PG_FUNCTION_INFO_V1(int4_dist);
  95 Datum
  96 int4_dist(PG_FUNCTION_ARGS)
  97 {
  98         int32           a = PG_GETARG_INT32(0);
  99         int32           b = PG_GETARG_INT32(1);
 100         int32           r;
 101         int32           ra;
 102
 103         if (pg_sub_s32_overflow(a, b, &r) ||
 104                 r == PG_INT32_MIN)
 105                 ereport(ERROR,
 106                                 (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
 107                                  errmsg("integer out of range")));
 108
 109         ra = abs(r);
 110
 111         PG_RETURN_INT32(ra);
 112 }
 113
 114
 115 /**************************************************
 116  * int32 ops
 117  **************************************************/
 118
 119
 120 Datum
 121 gbt_int4_compress(PG_FUNCTION_ARGS)
 122 {
 123         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 124
 125         PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
 126 }
 127
 128 Datum
 129 gbt_int4_fetch(PG_FUNCTION_ARGS)
 130 {
 131         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 132
 133         PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
 134 }
 135
 136 Datum
 137 gbt_int4_consistent(PG_FUNCTION_ARGS)
 138 {
 139         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 140         int32           query = PG_GETARG_INT32(1);
 141         StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
 142
 143         /* Oid          subtype = PG_GETARG_OID(3); */
 144         bool       *recheck = (bool *) PG_GETARG_POINTER(4);
 145         int32KEY   *kkk = (int32KEY *) DatumGetPointer(entry->key);
 146         GBT_NUMKEY_R key;
 147
 148         /* All cases served by this function are exact */
 149         *recheck = false;
 150
 151         key.lower = (GBT_NUMKEY *) &kkk->lower;
 152         key.upper = (GBT_NUMKEY *) &kkk->upper;
 153
 154         PG_RETURN_BOOL(gbt_num_consistent(&key, (void *) &query, &strategy,
 155                                                                           GIST_LEAF(entry), &tinfo, fcinfo->flinfo));
 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(gbt_num_distance(&key, (void *) &query, GIST_LEAF(entry),
 173                                                                           &tinfo, fcinfo->flinfo));
 174 }
 175
 176
 177 Datum
 178 gbt_int4_union(PG_FUNCTION_ARGS)
 179 {
 180         GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
 181         void       *out = palloc(sizeof(int32KEY));
 182
 183         *(int *) PG_GETARG_POINTER(1) = sizeof(int32KEY);
 184         PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo, fcinfo->flinfo));
 185 }
 186
 187
 188 Datum
 189 gbt_int4_penalty(PG_FUNCTION_ARGS)
 190 {
 191         int32KEY   *origentry = (int32KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
 192         int32KEY   *newentry = (int32KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
 193         float      *result = (float *) PG_GETARG_POINTER(2);
 194
 195         penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper);
 196
 197         PG_RETURN_POINTER(result);
 198 }
 199
 200 Datum
 201 gbt_int4_picksplit(PG_FUNCTION_ARGS)
 202 {
 203         PG_RETURN_POINTER(gbt_num_picksplit((GistEntryVector *) PG_GETARG_POINTER(0),
 204                                                                                 (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
 205                                                                                 &tinfo, fcinfo->flinfo));
 206 }
 207
 208 Datum
 209 gbt_int4_same(PG_FUNCTION_ARGS)
 210 {
 211         int32KEY   *b1 = (int32KEY *) PG_GETARG_POINTER(0);
 212         int32KEY   *b2 = (int32KEY *) PG_GETARG_POINTER(1);
 213         bool       *result = (bool *) PG_GETARG_POINTER(2);
 214
 215         *result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
 216         PG_RETURN_POINTER(result);
 217 }