PostGIS  2.1.10dev-r@@SVN_REVISION@@
uint8_t* getPoint_internal ( const POINTARRAY pa,
int  n 
)

Definition at line 1645 of file ptarray.c.

References POINTARRAY::flags, FLAGS_NDIMS, LWDEBUGF, lwerror(), POINTARRAY::maxpoints, POINTARRAY::npoints, ptarray_point_size(), and POINTARRAY::serialized_pointlist.

Referenced by circ_node_leaf_new(), circ_node_leaf_point_new(), getPoint2d_cp(), getPoint2d_p(), getPoint2d_p_ro(), getPoint3dm_p(), getPoint3dz_cp(), getPoint3dz_p(), getPoint4d_p(), gserialized_from_lwcircstring(), gserialized_from_lwline(), gserialized_from_lwpoint(), gserialized_from_lwpoly(), gserialized_from_lwtriangle(), lwcircstring_addpoint(), lwcircstring_from_lwmpoint(), lwcircstring_from_lwpointarray(), lwcompound_is_closed(), LWGEOM2GEOS(), lwline_make_geos_friendly(), parse_gml_curve(), ptarray_addPoint(), ptarray_append_ptarray(), ptarray_close2d(), ptarray_insert_point(), ptarray_is_closed(), ptarray_is_closed_2d(), ptarray_is_closed_3d(), ptarray_longitude_shift(), ptarray_merge(), ptarray_remove_point(), ptarray_remove_repeated_points(), ptarray_removePoint(), ptarray_reverse(), ptarray_same(), ptarray_set_point4d(), ptarray_to_wkb_buf(), ptarray_to_wkt_sb(), rect_node_leaf_new(), and ring_make_geos_friendly().

1646 {
1647  size_t size;
1648  uint8_t *ptr;
1649 
1650 #if PARANOIA_LEVEL > 0
1651  if ( pa == NULL )
1652  {
1653  lwerror("getPoint got NULL pointarray");
1654  return NULL;
1655  }
1656 
1657  LWDEBUGF(5, "(n=%d, pa.npoints=%d, pa.maxpoints=%d)",n,pa->npoints,pa->maxpoints);
1658 
1659  if ( ( n < 0 ) ||
1660  ( n > pa->npoints ) ||
1661  ( n >= pa->maxpoints ) )
1662  {
1663  lwerror("getPoint_internal called outside of ptarray range (n=%d, pa.npoints=%d, pa.maxpoints=%d)",n,pa->npoints,pa->maxpoints);
1664  return NULL; /*error */
1665  }
1666 #endif
1667 
1668  size = ptarray_point_size(pa);
1669 
1670  ptr = pa->serialized_pointlist + size * n;
1671  if ( FLAGS_NDIMS(pa->flags) == 2)
1672  {
1673  LWDEBUGF(5, "point = %g %g", *((double*)(ptr)), *((double*)(ptr+8)));
1674  }
1675  else if ( FLAGS_NDIMS(pa->flags) == 3)
1676  {
1677  LWDEBUGF(5, "point = %g %g %g", *((double*)(ptr)), *((double*)(ptr+8)), *((double*)(ptr+16)));
1678  }
1679  else if ( FLAGS_NDIMS(pa->flags) == 4)
1680  {
1681  LWDEBUGF(5, "point = %g %g %g %g", *((double*)(ptr)), *((double*)(ptr+8)), *((double*)(ptr+16)), *((double*)(ptr+24)));
1682  }
1683 
1684  return ptr;
1685 }
uint8_t * serialized_pointlist
Definition: liblwgeom.h:322
int ptarray_point_size(const POINTARRAY *pa)
Definition: ptarray.c:41
int npoints
Definition: liblwgeom.h:327
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:67
uint8_t flags
Definition: liblwgeom.h:325
int maxpoints
Definition: liblwgeom.h:328
#define LWDEBUGF(level, msg,...)
Definition: lwgeom_log.h:55
#define FLAGS_NDIMS(flags)
Definition: liblwgeom.h:118

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