PostGIS  2.5.0dev-r@@SVN_REVISION@@
LWGEOM* lwgeom_sharedpaths ( const LWGEOM geom1,
const LWGEOM geom2 
)

Definition at line 1578 of file liblwgeom/lwgeom_geos.c.

References error_if_srid_mismatch(), LWGEOM::flags, FLAGS_GET_Z, GEOS2LWGEOM(), lwerror(), LWGEOM2GEOS(), lwgeom_geos_errmsg, lwgeom_geos_error(), lwnotice(), and LWGEOM::srid.

Referenced by ST_SharedPaths().

1579 {
1580  GEOSGeometry *g1, *g2, *g3;
1581  LWGEOM *out;
1582  int is3d, srid;
1583 
1584  srid = geom1->srid;
1585  error_if_srid_mismatch(srid, (int)(geom2->srid));
1586 
1587  is3d = (FLAGS_GET_Z(geom1->flags) || FLAGS_GET_Z(geom2->flags)) ;
1588 
1589  initGEOS(lwnotice, lwgeom_geos_error);
1590 
1591  g1 = (GEOSGeometry *)LWGEOM2GEOS(geom1, 0);
1592  if ( 0 == g1 ) /* exception thrown at construction */
1593  {
1594  lwerror("First argument geometry could not be converted to GEOS: %s", lwgeom_geos_errmsg);
1595  return NULL;
1596  }
1597 
1598  g2 = (GEOSGeometry *)LWGEOM2GEOS(geom2, 0);
1599  if ( 0 == g2 ) /* exception thrown at construction */
1600  {
1601  lwerror("Second argument geometry could not be converted to GEOS: %s", lwgeom_geos_errmsg);
1602  GEOSGeom_destroy(g1);
1603  return NULL;
1604  }
1605 
1606  g3 = GEOSSharedPaths(g1,g2);
1607 
1608  GEOSGeom_destroy(g1);
1609  GEOSGeom_destroy(g2);
1610 
1611  if (g3 == NULL)
1612  {
1613  lwerror("GEOSSharedPaths: %s", lwgeom_geos_errmsg);
1614  return NULL;
1615  }
1616 
1617  GEOSSetSRID(g3, srid);
1618  out = GEOS2LWGEOM(g3, is3d);
1619  GEOSGeom_destroy(g3);
1620 
1621  if (out == NULL)
1622  {
1623  lwerror("GEOS2LWGEOM threw an error");
1624  return NULL;
1625  }
1626 
1627  return out;
1628 }
void lwnotice(const char *fmt,...)
Write a notice out to the notice handler.
Definition: lwutil.c:177
uint8_t flags
Definition: liblwgeom.h:396
char lwgeom_geos_errmsg[LWGEOM_GEOS_ERRMSG_MAXSIZE]
void error_if_srid_mismatch(int srid1, int srid2)
Definition: lwutil.c:338
int32_t srid
Definition: liblwgeom.h:398
void lwgeom_geos_error(const char *fmt,...)
#define FLAGS_GET_Z(flags)
Macros for manipulating the 'flags' byte.
Definition: liblwgeom.h:139
GEOSGeometry * LWGEOM2GEOS(const LWGEOM *lwgeom, int autofix)
LWGEOM * GEOS2LWGEOM(const GEOSGeometry *geom, char want3d)
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:190

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