PostGIS  2.1.10dev-r@@SVN_REVISION@@
static int gserialized_datum_predicate ( Datum  gs1,
Datum  gs2,
gidx_predicate  predicate 
)
static

Support function.

Based on two datums return true if they satisfy the predicate and false otherwise.

Definition at line 437 of file gserialized_gist_nd.c.

References LW_FALSE, LW_SUCCESS, and LW_TRUE.

Referenced by gserialized_contains(), gserialized_overlaps(), and gserialized_within().

438 {
439  /* Put aside some stack memory and use it for GIDX pointers. */
440  char boxmem1[GIDX_MAX_SIZE];
441  char boxmem2[GIDX_MAX_SIZE];
442  GIDX *gidx1 = (GIDX*)boxmem1;
443  GIDX *gidx2 = (GIDX*)boxmem2;
444 
445  POSTGIS_DEBUG(3, "entered function");
446 
447  /* Must be able to build box for each arguement (ie, not empty geometry)
448  and predicate function to return true. */
449  if ( (gserialized_datum_get_gidx_p(gs1, gidx1) == LW_SUCCESS) &&
450  (gserialized_datum_get_gidx_p(gs2, gidx2) == LW_SUCCESS) &&
451  predicate(gidx1, gidx2) )
452  {
453  POSTGIS_DEBUGF(3, "got boxes %s and %s", gidx_to_string(gidx1), gidx_to_string(gidx2));
454  return LW_TRUE;
455  }
456  return LW_FALSE;
457 }
#define LW_SUCCESS
Definition: liblwgeom.h:55
#define LW_FALSE
Definition: liblwgeom.h:52
#define LW_TRUE
Return types for functions with status returns.
Definition: liblwgeom.h:51

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