PostGIS  2.5.7dev-r@@SVN_REVISION@@

◆ ptarray_merge()

POINTARRAY* ptarray_merge ( POINTARRAY pa1,

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

Warning: this function free the two inputs POINTARRAY

POINTARRAY is newly allocated

Definition at line 597 of file ptarray.c.

598 {
599  POINTARRAY *pa;
600  size_t ptsize = ptarray_point_size(pa1);
602  if (FLAGS_GET_ZM(pa1->flags) != FLAGS_GET_ZM(pa2->flags))
603  lwerror("ptarray_cat: Mixed dimension");
605  pa = ptarray_construct( FLAGS_GET_Z(pa1->flags),
606  FLAGS_GET_M(pa1->flags),
607  pa1->npoints + pa2->npoints);
609  memcpy( getPoint_internal(pa, 0),
610  getPoint_internal(pa1, 0),
611  ptsize*(pa1->npoints));
613  memcpy( getPoint_internal(pa, pa1->npoints),
614  getPoint_internal(pa2, 0),
615  ptsize*(pa2->npoints));
617  ptarray_free(pa1);
618  ptarray_free(pa2);
620  return pa;
621 }
#define FLAGS_GET_Z(flags)
Macros for manipulating the 'flags' byte.
Definition: liblwgeom.h:140
#define FLAGS_GET_M(flags)
Definition: liblwgeom.h:141
#define FLAGS_GET_ZM(flags)
Definition: liblwgeom.h:153
void lwerror(const char *fmt,...)
Write a notice out to the error handler.
Definition: lwutil.c:190
uint8_t * getPoint_internal(const POINTARRAY *pa, uint32_t n)
Definition: ptarray.c:1750
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
size_t ptarray_point_size(const POINTARRAY *pa)
Definition: ptarray.c:54
void ptarray_free(POINTARRAY *pa)
Definition: ptarray.c:328
uint32_t npoints
Definition: liblwgeom.h:374
uint8_t flags
Definition: liblwgeom.h:372

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().

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