PostGIS  2.1.10dev-r@@SVN_REVISION@@
char lwcollection_same ( const LWCOLLECTION c1,
const LWCOLLECTION c2 
)

check for same geometry composition

Definition at line 238 of file lwcollection.c.

References LWCOLLECTION::geoms, LW_FALSE, LW_TRUE, LWDEBUG, lwgeom_same(), LWCOLLECTION::ngeoms, and LWCOLLECTION::type.

Referenced by lwgeom_same().

239 {
240  uint32_t i;
241 
242  LWDEBUG(2, "lwcollection_same called");
243 
244  if ( c1->type != c2->type ) return LW_FALSE;
245  if ( c1->ngeoms != c2->ngeoms ) return LW_FALSE;
246 
247  for ( i = 0; i < c1->ngeoms; i++ )
248  {
249  if ( ! lwgeom_same(c1->geoms[i], c2->geoms[i]) )
250  return LW_FALSE;
251  }
252 
253  /* Former method allowed out-of-order equality between collections
254 
255  hit = lwalloc(sizeof(uint32_t)*c1->ngeoms);
256  memset(hit, 0, sizeof(uint32_t)*c1->ngeoms);
257 
258  for (i=0; i<c1->ngeoms; i++)
259  {
260  char found=0;
261  for (j=0; j<c2->ngeoms; j++)
262  {
263  if ( hit[j] ) continue;
264  if ( lwgeom_same(c1->geoms[i], c2->geoms[j]) )
265  {
266  hit[j] = 1;
267  found=1;
268  break;
269  }
270  }
271  if ( ! found ) return LW_FALSE;
272  }
273  */
274 
275  return LW_TRUE;
276 }
uint8_t type
Definition: liblwgeom.h:459
#define LWDEBUG(level, msg)
Definition: lwgeom_log.h:50
#define LW_FALSE
Definition: liblwgeom.h:52
#define LW_TRUE
Return types for functions with status returns.
Definition: liblwgeom.h:51
LWGEOM ** geoms
Definition: liblwgeom.h:465
char lwgeom_same(const LWGEOM *lwgeom1, const LWGEOM *lwgeom2)
geom1 same as geom2 iff
Definition: lwgeom.c:451

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