PostGIS  2.3.7dev-r@@SVN_REVISION@@
LWPOLY* lwpoly_from_lwlines ( const LWLINE shell,
uint32_t  nholes,
const LWLINE **  holes 
)

Definition at line 326 of file lwpoly.c.

References lwalloc(), lwerror(), lwpoly_construct(), POINTARRAY::npoints, LWLINE::points, ptarray_clone_deep(), ptarray_is_closed_2d(), and LWLINE::srid.

Referenced by lwgeom_force_sfs(), and LWGEOM_makepoly().

328 {
329  uint32_t nrings;
330  POINTARRAY **rings = lwalloc((nholes+1)*sizeof(POINTARRAY *));
331  int srid = shell->srid;
332  LWPOLY *ret;
333 
334  if ( shell->points->npoints < 4 )
335  lwerror("lwpoly_from_lwlines: shell must have at least 4 points");
336  if ( ! ptarray_is_closed_2d(shell->points) )
337  lwerror("lwpoly_from_lwlines: shell must be closed");
338  rings[0] = ptarray_clone_deep(shell->points);
339 
340  for (nrings=1; nrings<=nholes; nrings++)
341  {
342  const LWLINE *hole = holes[nrings-1];
343 
344  if ( hole->srid != srid )
345  lwerror("lwpoly_from_lwlines: mixed SRIDs in input lines");
346 
347  if ( hole->points->npoints < 4 )
348  lwerror("lwpoly_from_lwlines: holes must have at least 4 points");
349  if ( ! ptarray_is_closed_2d(hole->points) )
350  lwerror("lwpoly_from_lwlines: holes must be closed");
351 
352  rings[nrings] = ptarray_clone_deep(hole->points);
353  }
354 
355  ret = lwpoly_construct(srid, NULL, nrings, rings);
356  return ret;
357 }
int npoints
Definition: liblwgeom.h:370
int32_t srid
Definition: liblwgeom.h:420
int ptarray_is_closed_2d(const POINTARRAY *pa)
Definition: ptarray.c:694
LWPOLY * lwpoly_construct(int srid, GBOX *bbox, uint32_t nrings, POINTARRAY **points)
Definition: lwpoly.c:43
POINTARRAY * ptarray_clone_deep(const POINTARRAY *ptarray)
Deep clone a pointarray (also clones serialized pointlist)
Definition: ptarray.c:634
void * lwalloc(size_t size)
Definition: lwutil.c:227
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:102
POINTARRAY * points
Definition: liblwgeom.h:421

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