PostGIS  3.1.6dev-r@@SVN_REVISION@@

◆ lwgeom_get_geos_coordseq_2d()

static GEOSCoordSequence* lwgeom_get_geos_coordseq_2d ( const LWGEOM g,
uint32_t  num_points 
)
static

Definition at line 1977 of file liblwgeom/lwgeom_geos.c.

1978 {
1979  uint32_t i = 0;
1980  uint8_t num_dims = 2;
1981  LWPOINTITERATOR* it;
1982  GEOSCoordSequence* coords;
1983  POINT4D tmp;
1984 
1985  coords = GEOSCoordSeq_create(num_points, num_dims);
1986  if (!coords) return NULL;
1987 
1988  it = lwpointiterator_create(g);
1989  while (lwpointiterator_next(it, &tmp))
1990  {
1991  if (i >= num_points)
1992  {
1993  lwerror("Incorrect num_points provided to lwgeom_get_geos_coordseq_2d");
1994  GEOSCoordSeq_destroy(coords);
1996  return NULL;
1997  }
1998 
1999 #if POSTGIS_GEOS_VERSION < 38
2000  if (!GEOSCoordSeq_setX(coords, i, tmp.x) || !GEOSCoordSeq_setY(coords, i, tmp.y))
2001 #else
2002  if (!GEOSCoordSeq_setXY(coords, i, tmp.x, tmp.y))
2003 #endif
2004  {
2005  GEOSCoordSeq_destroy(coords);
2007  return NULL;
2008  }
2009  i++;
2010  }
2012 
2013  return coords;
2014 }
LWPOINTITERATOR * lwpointiterator_create(const LWGEOM *g)
Create a new LWPOINTITERATOR over supplied LWGEOM*.
Definition: lwiterator.c:242
int lwpointiterator_next(LWPOINTITERATOR *s, POINT4D *p)
Attempts to assign the next point in the iterator to p, and advances the iterator to the next point.
Definition: lwiterator.c:210
void lwpointiterator_destroy(LWPOINTITERATOR *s)
Free all memory associated with the iterator.
Definition: lwiterator.c:267
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:190
double x
Definition: liblwgeom.h:428
double y
Definition: liblwgeom.h:428

References lwerror(), lwpointiterator_create(), lwpointiterator_destroy(), lwpointiterator_next(), POINT4D::x, and POINT4D::y.

Referenced by lwgeom_voronoi_diagram().

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