PostGIS  2.2.7dev-r@@SVN_REVISION@@
Datum gserialized_gist_union_2d ( PG_FUNCTION_ARGS  )

Definition at line 1181 of file gserialized_gist_2d.c.

References box2df_copy(), box2df_merge(), and box2df_to_string().

1182 {
1183  GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
1184  int *sizep = (int *) PG_GETARG_POINTER(1); /* Size of the return value */
1185  int numranges, i;
1186  BOX2DF *box_cur, *box_union;
1187 
1188  POSTGIS_DEBUG(4, "[GIST] 'union' function called");
1189 
1190  numranges = entryvec->n;
1191 
1192  box_cur = (BOX2DF*) DatumGetPointer(entryvec->vector[0].key);
1193 
1194  box_union = box2df_copy(box_cur);
1195 
1196  for ( i = 1; i < numranges; i++ )
1197  {
1198  box_cur = (BOX2DF*) DatumGetPointer(entryvec->vector[i].key);
1199  box2df_merge(box_union, box_cur);
1200  }
1201 
1202  *sizep = sizeof(BOX2DF);
1203 
1204  POSTGIS_DEBUGF(4, "[GIST] 'union', numranges(%i), pageunion %s", numranges, box2df_to_string(box_union));
1205 
1206  PG_RETURN_POINTER(box_union);
1207 
1208 }
static BOX2DF * box2df_copy(BOX2DF *b)
static char * box2df_to_string(const BOX2DF *a)
static void box2df_merge(BOX2DF *b_union, BOX2DF *b_new)

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