#include "csf.h"
#include "csfimpl.h"

/* set a memory location to a missing value
 * SetMV sets a memory location to a missing value
 * (using the application cell representation).
 * SetMV is quite slow but handy as in the example
 * below. In general one should use assignment for
 * integers (e.g. v = MV_UINT1) or the macro's
 * SET_MV_REAL4 and SET_MV_REAL8
 *
 * EXAMPLE
 * .so examples/border.tr
 */
void SetMV(
	const MAP *m, /* map handle */
	void *c)      /* write-only. location set to missing value */
{
	SetMVcellRepr(m->appCR, c);
}

/* set a memory location to a missing value
 * SetMVcellRepr sets a memory location to a missing value
 * (using the application cell representation).
 * In general one should use assignment for
 * integers (e.g. v = MV_UINT1) or the macro's
 * SET_MV_REAL4 and SET_MV_REAL8
 *
 */
void SetMVcellRepr(
	CSF_CR cellRepr, /* cell representation, one of the CR_* constants */
	void *c)      /* write-only. location set to missing value */
{
	switch (cellRepr)
	{
		case CR_INT1  : *((INT1 *)c) = MV_INT1;
				break;
		case CR_INT2  : *((INT2 *)c) = MV_INT2;
				break;
		case CR_INT4  : *((INT4 *)c) = MV_INT4;
				break;
		case CR_UINT1 : *((UINT1 *)c) = MV_UINT1;
				break;
		case CR_UINT2 : *((UINT2 *)c) = MV_UINT2;
				break;
		case CR_REAL8 :
				((UINT4 *)c)[1] = MV_UINT4;
                                *((UINT4 *)c) = MV_UINT4;
                                break;
		default       : POSTCOND(
					cellRepr == CR_REAL4 ||
					cellRepr == CR_UINT4 );
				*((UINT4 *)c) = MV_UINT4;
	}
}