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

Definition at line 1581 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().

1582 {
1583  GEOSGeometry *g1, *g2, *g3;
1584  LWGEOM *out;
1585  int is3d, srid;
1586 
1587  srid = geom1->srid;
1588  error_if_srid_mismatch(srid, (int)(geom2->srid));
1589 
1590  is3d = (FLAGS_GET_Z(geom1->flags) || FLAGS_GET_Z(geom2->flags)) ;
1591 
1592  initGEOS(lwnotice, lwgeom_geos_error);
1593 
1594  g1 = (GEOSGeometry *)LWGEOM2GEOS(geom1, 0);
1595  if ( 0 == g1 ) /* exception thrown at construction */
1596  {
1597  lwerror("First argument geometry could not be converted to GEOS: %s", lwgeom_geos_errmsg);
1598  return NULL;
1599  }
1600 
1601  g2 = (GEOSGeometry *)LWGEOM2GEOS(geom2, 0);
1602  if ( 0 == g2 ) /* exception thrown at construction */
1603  {
1604  lwerror("Second argument geometry could not be converted to GEOS: %s", lwgeom_geos_errmsg);
1605  GEOSGeom_destroy(g1);
1606  return NULL;
1607  }
1608 
1609  g3 = GEOSSharedPaths(g1,g2);
1610 
1611  GEOSGeom_destroy(g1);
1612  GEOSGeom_destroy(g2);
1613 
1614  if (g3 == NULL)
1615  {
1616  lwerror("GEOSSharedPaths: %s", lwgeom_geos_errmsg);
1617  return NULL;
1618  }
1619 
1620  GEOSSetSRID(g3, srid);
1621  out = GEOS2LWGEOM(g3, is3d);
1622  GEOSGeom_destroy(g3);
1623 
1624  if (out == NULL)
1625  {
1626  lwerror("GEOS2LWGEOM threw an error");
1627  return NULL;
1628  }
1629 
1630  return out;
1631 }
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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