PostGIS  2.2.7dev-r@@SVN_REVISION@@
POINTARRAY* ptarray_merge ( POINTARRAY pa1,
POINTARRAY pa2 
)

Merge two given POINTARRAY and returns a pointer on the new aggregate one.

Warning: this function free the two inputs POINTARRAY

Returns
POINTARRAY is newly allocated

Definition at line 603 of file ptarray.c.

References POINTARRAY::flags, FLAGS_GET_M, FLAGS_GET_Z, FLAGS_GET_ZM, getPoint_internal(), lwerror(), POINTARRAY::npoints, ptarray_construct(), ptarray_free(), and ptarray_point_size().

Referenced by parse_gml_data().

604 {
605  POINTARRAY *pa;
606  size_t ptsize = ptarray_point_size(pa1);
607 
608  if (FLAGS_GET_ZM(pa1->flags) != FLAGS_GET_ZM(pa2->flags))
609  lwerror("ptarray_cat: Mixed dimension");
610 
611  pa = ptarray_construct( FLAGS_GET_Z(pa1->flags),
612  FLAGS_GET_M(pa1->flags),
613  pa1->npoints + pa2->npoints);
614 
615  memcpy( getPoint_internal(pa, 0),
616  getPoint_internal(pa1, 0),
617  ptsize*(pa1->npoints));
618 
619  memcpy( getPoint_internal(pa, pa1->npoints),
620  getPoint_internal(pa2, 0),
621  ptsize*(pa2->npoints));
622 
623  ptarray_free(pa1);
624  ptarray_free(pa2);
625 
626  return pa;
627 }
int ptarray_point_size(const POINTARRAY *pa)
Definition: ptarray.c:54
int npoints
Definition: liblwgeom.h:355
#define FLAGS_GET_ZM(flags)
Definition: liblwgeom.h:137
uint8_t flags
Definition: liblwgeom.h:353
POINTARRAY * ptarray_construct(char hasz, char hasm, uint32_t npoints)
Construct an empty pointarray, allocating storage and setting the npoints, but not filling in any inf...
Definition: ptarray.c:62
#define FLAGS_GET_Z(flags)
Macros for manipulating the 'flags' byte.
Definition: liblwgeom.h:124
#define FLAGS_GET_M(flags)
Definition: liblwgeom.h:125
void ptarray_free(POINTARRAY *pa)
Definition: ptarray.c:330
uint8_t * getPoint_internal(const POINTARRAY *pa, int n)
Definition: ptarray.c:1706
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:74

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