granicus.if.org Git - postgresql/blob - contrib/btree_gist/btree_float4.c

   1 /*
   2  * contrib/btree_gist/btree_float4.c
   3  */
   4 #include "postgres.h"
   5
   6 #include "btree_gist.h"
   7 #include "btree_utils_num.h"
   8
   9 typedef struct float4key
  10 {
  11         float4          lower;
  12         float4          upper;
  13 } float4KEY;
  14
  15 /*
  16 ** float4 ops
  17 */
  18 PG_FUNCTION_INFO_V1(gbt_float4_compress);
  19 PG_FUNCTION_INFO_V1(gbt_float4_fetch);
  20 PG_FUNCTION_INFO_V1(gbt_float4_union);
  21 PG_FUNCTION_INFO_V1(gbt_float4_picksplit);
  22 PG_FUNCTION_INFO_V1(gbt_float4_consistent);
  23 PG_FUNCTION_INFO_V1(gbt_float4_distance);
  24 PG_FUNCTION_INFO_V1(gbt_float4_penalty);
  25 PG_FUNCTION_INFO_V1(gbt_float4_same);
  26
  27 static bool
  28 gbt_float4gt(const void *a, const void *b, FmgrInfo *flinfo)
  29 {
  30         return (*((const float4 *) a) > *((const float4 *) b));
  31 }
  32 static bool
  33 gbt_float4ge(const void *a, const void *b, FmgrInfo *flinfo)
  34 {
  35         return (*((const float4 *) a) >= *((const float4 *) b));
  36 }
  37 static bool
  38 gbt_float4eq(const void *a, const void *b, FmgrInfo *flinfo)
  39 {
  40         return (*((const float4 *) a) == *((const float4 *) b));
  41 }
  42 static bool
  43 gbt_float4le(const void *a, const void *b, FmgrInfo *flinfo)
  44 {
  45         return (*((const float4 *) a) <= *((const float4 *) b));
  46 }
  47 static bool
  48 gbt_float4lt(const void *a, const void *b, FmgrInfo *flinfo)
  49 {
  50         return (*((const float4 *) a) < *((const float4 *) b));
  51 }
  52
  53 static int
  54 gbt_float4key_cmp(const void *a, const void *b, FmgrInfo *flinfo)
  55 {
  56         float4KEY  *ia = (float4KEY *) (((const Nsrt *) a)->t);
  57         float4KEY  *ib = (float4KEY *) (((const Nsrt *) b)->t);
  58
  59         if (ia->lower == ib->lower)
  60         {
  61                 if (ia->upper == ib->upper)
  62                         return 0;
  63
  64                 return (ia->upper > ib->upper) ? 1 : -1;
  65         }
  66
  67         return (ia->lower > ib->lower) ? 1 : -1;
  68 }
  69
  70 static float8
  71 gbt_float4_dist(const void *a, const void *b, FmgrInfo *flinfo)
  72 {
  73         return GET_FLOAT_DISTANCE(float4, a, b);
  74 }
  75
  76
  77 static const gbtree_ninfo tinfo =
  78 {
  79         gbt_t_float4,
  80         sizeof(float4),
  81         8,                                                      /* sizeof(gbtreekey8) */
  82         gbt_float4gt,
  83         gbt_float4ge,
  84         gbt_float4eq,
  85         gbt_float4le,
  86         gbt_float4lt,
  87         gbt_float4key_cmp,
  88         gbt_float4_dist
  89 };
  90
  91
  92 PG_FUNCTION_INFO_V1(float4_dist);
  93 Datum
  94 float4_dist(PG_FUNCTION_ARGS)
  95 {
  96         float4          a = PG_GETARG_FLOAT4(0);
  97         float4          b = PG_GETARG_FLOAT4(1);
  98         float4          r;
  99
 100         r = a - b;
 101         CHECKFLOATVAL(r, isinf(a) || isinf(b), true);
 102
 103         PG_RETURN_FLOAT4(Abs(r));
 104 }
 105
 106
 107 /**************************************************
 108  * float4 ops
 109  **************************************************/
 110
 111
 112 Datum
 113 gbt_float4_compress(PG_FUNCTION_ARGS)
 114 {
 115         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 116
 117         PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
 118 }
 119
 120 Datum
 121 gbt_float4_fetch(PG_FUNCTION_ARGS)
 122 {
 123         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 124
 125         PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
 126 }
 127
 128 Datum
 129 gbt_float4_consistent(PG_FUNCTION_ARGS)
 130 {
 131         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 132         float4          query = PG_GETARG_FLOAT4(1);
 133         StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
 134
 135         /* Oid          subtype = PG_GETARG_OID(3); */
 136         bool       *recheck = (bool *) PG_GETARG_POINTER(4);
 137         float4KEY  *kkk = (float4KEY *) DatumGetPointer(entry->key);
 138         GBT_NUMKEY_R key;
 139
 140         /* All cases served by this function are exact */
 141         *recheck = false;
 142
 143         key.lower = (GBT_NUMKEY *) &kkk->lower;
 144         key.upper = (GBT_NUMKEY *) &kkk->upper;
 145
 146         PG_RETURN_BOOL(
 147                                    gbt_num_consistent(&key, (void *) &query, &strategy, GIST_LEAF(entry), &tinfo, fcinfo->flinfo)
 148                 );
 149 }
 150
 151
 152 Datum
 153 gbt_float4_distance(PG_FUNCTION_ARGS)
 154 {
 155         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 156         float4          query = PG_GETARG_FLOAT4(1);
 157
 158         /* Oid          subtype = PG_GETARG_OID(3); */
 159         float4KEY  *kkk = (float4KEY *) DatumGetPointer(entry->key);
 160         GBT_NUMKEY_R key;
 161
 162         key.lower = (GBT_NUMKEY *) &kkk->lower;
 163         key.upper = (GBT_NUMKEY *) &kkk->upper;
 164
 165         PG_RETURN_FLOAT8(
 166                                          gbt_num_distance(&key, (void *) &query, GIST_LEAF(entry), &tinfo, fcinfo->flinfo)
 167                 );
 168 }
 169
 170
 171 Datum
 172 gbt_float4_union(PG_FUNCTION_ARGS)
 173 {
 174         GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
 175         void       *out = palloc(sizeof(float4KEY));
 176
 177         *(int *) PG_GETARG_POINTER(1) = sizeof(float4KEY);
 178         PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo, fcinfo->flinfo));
 179 }
 180
 181
 182 Datum
 183 gbt_float4_penalty(PG_FUNCTION_ARGS)
 184 {
 185         float4KEY  *origentry = (float4KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
 186         float4KEY  *newentry = (float4KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
 187         float      *result = (float *) PG_GETARG_POINTER(2);
 188
 189         penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper);
 190
 191         PG_RETURN_POINTER(result);
 192
 193 }
 194
 195 Datum
 196 gbt_float4_picksplit(PG_FUNCTION_ARGS)
 197 {
 198         PG_RETURN_POINTER(gbt_num_picksplit(
 199                                                                         (GistEntryVector *) PG_GETARG_POINTER(0),
 200                                                                           (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
 201                                                                                 &tinfo, fcinfo->flinfo
 202                                                                                 ));
 203 }
 204
 205 Datum
 206 gbt_float4_same(PG_FUNCTION_ARGS)
 207 {
 208         float4KEY  *b1 = (float4KEY *) PG_GETARG_POINTER(0);
 209         float4KEY  *b2 = (float4KEY *) PG_GETARG_POINTER(1);
 210         bool       *result = (bool *) PG_GETARG_POINTER(2);
 211
 212         *result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
 213         PG_RETURN_POINTER(result);
 214 }