Function array_copy

src/backend/utils/adt/arrayfuncs.c:4825–4836

* Copy nitems array elements from srcptr to destptr * * destptr: starting destination location (must be enough room!) * nitems: number of array elements to copy (>= 0) * srcptr: starting location in source array * offset: 0-based linear element number of first element (the one at *srcptr) * nullbitmap: start of source array's null bitmap, or NULL if none * typlen, typbyval, typalign: storag

 * NB: this does not take care of setting up the destination's null bitmap!
 */
static int
array_copy(char *destptr, int nitems,
		   char *srcptr, int offset, bits8 *nullbitmap,
		   int typlen, bool typbyval, char typalign)
{
	int			numbytes;

	numbytes = array_nelems_size(srcptr, offset, nullbitmap, nitems,
								 typlen, typbyval, typalign);
	memcpy(destptr, srcptr, numbytes);
	return numbytes;
}

/*
 * Copy nitems null-bitmap bits from source to destination