contrib/btree_gist/btree_float4.c

   1 /*
   2  * $PostgreSQL: pgsql/contrib/btree_gist/btree_float4.c,v 1.10 2010/02/26 02:00:31 momjian Exp $
   3  */
   4 #include "btree_gist.h"
   5 #include "btree_utils_num.h"
   6
   7 typedef struct float4key
   8 {
   9         float4          lower;
  10         float4          upper;
  11 } float4KEY;
  12
  13 /*
  14 ** float4 ops
  15 */
  16 PG_FUNCTION_INFO_V1(gbt_float4_compress);
  17 PG_FUNCTION_INFO_V1(gbt_float4_union);
  18 PG_FUNCTION_INFO_V1(gbt_float4_picksplit);
  19 PG_FUNCTION_INFO_V1(gbt_float4_consistent);
  20 PG_FUNCTION_INFO_V1(gbt_float4_penalty);
  21 PG_FUNCTION_INFO_V1(gbt_float4_same);
  22
  23 Datum           gbt_float4_compress(PG_FUNCTION_ARGS);
  24 Datum           gbt_float4_union(PG_FUNCTION_ARGS);
  25 Datum           gbt_float4_picksplit(PG_FUNCTION_ARGS);
  26 Datum           gbt_float4_consistent(PG_FUNCTION_ARGS);
  27 Datum           gbt_float4_penalty(PG_FUNCTION_ARGS);
  28 Datum           gbt_float4_same(PG_FUNCTION_ARGS);
  29
  30 static bool
  31 gbt_float4gt(const void *a, const void *b)
  32 {
  33         return (*((float4 *) a) > *((float4 *) b));
  34 }
  35 static bool
  36 gbt_float4ge(const void *a, const void *b)
  37 {
  38         return (*((float4 *) a) >= *((float4 *) b));
  39 }
  40 static bool
  41 gbt_float4eq(const void *a, const void *b)
  42 {
  43         return (*((float4 *) a) == *((float4 *) b));
  44 }
  45 static bool
  46 gbt_float4le(const void *a, const void *b)
  47 {
  48         return (*((float4 *) a) <= *((float4 *) b));
  49 }
  50 static bool
  51 gbt_float4lt(const void *a, const void *b)
  52 {
  53         return (*((float4 *) a) < *((float4 *) b));
  54 }
  55
  56 static int
  57 gbt_float4key_cmp(const void *a, const void *b)
  58 {
  59         float4KEY  *ia = (float4KEY *) (((Nsrt *) a)->t);
  60         float4KEY  *ib = (float4KEY *) (((Nsrt *) b)->t);
  61
  62         if (ia->lower == ib->lower)
  63         {
  64                 if (ia->upper == ib->upper)
  65                         return 0;
  66
  67                 return (ia->upper > ib->upper) ? 1 : -1;
  68         }
  69
  70         return (ia->lower > ib->lower) ? 1 : -1;
  71 }
  72
  73
  74 static const gbtree_ninfo tinfo =
  75 {
  76         gbt_t_float4,
  77         sizeof(float4),
  78         gbt_float4gt,
  79         gbt_float4ge,
  80         gbt_float4eq,
  81         gbt_float4le,
  82         gbt_float4lt,
  83         gbt_float4key_cmp
  84 };
  85
  86
  87 /**************************************************
  88  * float4 ops
  89  **************************************************/
  90
  91
  92 Datum
  93 gbt_float4_compress(PG_FUNCTION_ARGS)
  94 {
  95         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
  96         GISTENTRY  *retval = NULL;
  97
  98         PG_RETURN_POINTER(gbt_num_compress(retval, entry, &tinfo));
  99 }
 100
 101
 102 Datum
 103 gbt_float4_consistent(PG_FUNCTION_ARGS)
 104 {
 105         GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 106         float4          query = PG_GETARG_FLOAT4(1);
 107         StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
 108
 109         /* Oid          subtype = PG_GETARG_OID(3); */
 110         bool       *recheck = (bool *) PG_GETARG_POINTER(4);
 111         float4KEY  *kkk = (float4KEY *) DatumGetPointer(entry->key);
 112         GBT_NUMKEY_R key;
 113
 114         /* All cases served by this function are exact */
 115         *recheck = false;
 116
 117         key.lower = (GBT_NUMKEY *) &kkk->lower;
 118         key.upper = (GBT_NUMKEY *) &kkk->upper;
 119
 120         PG_RETURN_BOOL(
 121                                    gbt_num_consistent(&key, (void *) &query, &strategy, GIST_LEAF(entry), &tinfo)
 122                 );
 123 }
 124
 125
 126 Datum
 127 gbt_float4_union(PG_FUNCTION_ARGS)
 128 {
 129         GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
 130         void       *out = palloc(sizeof(float4KEY));
 131
 132         *(int *) PG_GETARG_POINTER(1) = sizeof(float4KEY);
 133         PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo));
 134 }
 135
 136
 137 Datum
 138 gbt_float4_penalty(PG_FUNCTION_ARGS)
 139 {
 140         float4KEY  *origentry = (float4KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
 141         float4KEY  *newentry = (float4KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
 142         float      *result = (float *) PG_GETARG_POINTER(2);
 143
 144         penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper);
 145
 146         PG_RETURN_POINTER(result);
 147
 148 }
 149
 150 Datum
 151 gbt_float4_picksplit(PG_FUNCTION_ARGS)
 152 {
 153         PG_RETURN_POINTER(gbt_num_picksplit(
 154                                                                         (GistEntryVector *) PG_GETARG_POINTER(0),
 155                                                                           (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
 156                                                                                 &tinfo
 157                                                                                 ));
 158 }
 159
 160 Datum
 161 gbt_float4_same(PG_FUNCTION_ARGS)
 162 {
 163         float4KEY  *b1 = (float4KEY *) PG_GETARG_POINTER(0);
 164         float4KEY  *b2 = (float4KEY *) PG_GETARG_POINTER(1);
 165         bool       *result = (bool *) PG_GETARG_POINTER(2);
 166
 167         *result = gbt_num_same((void *) b1, (void *) b2, &tinfo);
 168         PG_RETURN_POINTER(result);
 169 }