PostGIS  2.5.2dev-r@@SVN_REVISION@@

◆ getPoint3dz_cp()

const POINT3DZ* getPoint3dz_cp ( const POINTARRAY pa,
uint32_t  n 
)

Returns a POINT3DZ pointer into the POINTARRAY serialized_ptlist, suitable for reading from.

This is very high performance and declared const because you aren't allowed to muck with the values, only read them.

Definition at line 388 of file lwgeom_api.c.

References POINTARRAY::flags, FLAGS_GET_Z, getPoint_internal(), lwerror(), and POINTARRAY::npoints.

Referenced by pointArray_to_geojson(), pointArray_toGML2(), pointArray_toGML3(), and ptarray_to_GEOSCoordSeq().

389 {
390  if ( ! pa ) return 0;
391 
392  if ( ! FLAGS_GET_Z(pa->flags) )
393  {
394  lwerror("getPoint3dz_cp: no Z coordinates in point array");
395  return 0; /*error */
396  }
397 
398  if ( n>=pa->npoints )
399  {
400  lwerror("getPoint3dz_cp: point offset out of range");
401  return 0; /*error */
402  }
403 
404  return (const POINT3DZ*)getPoint_internal(pa, n);
405 }
uint8_t flags
Definition: liblwgeom.h:372
#define FLAGS_GET_Z(flags)
Macros for manipulating the 'flags' byte.
Definition: liblwgeom.h:140
uint8_t * getPoint_internal(const POINTARRAY *pa, uint32_t n)
Definition: ptarray.c:1750
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:190
uint32_t npoints
Definition: liblwgeom.h:374
Here is the call graph for this function:
Here is the caller graph for this function: