/* FreeRDP: A Remote Desktop Protocol Client

 * Add operations.

 * vi:ts=4 sw=4:

 *

 * (c) Copyright 2012 Hewlett-Packard Development Company, L.P.

 * Licensed under the Apache License, Version 2.0 (the "License"); you may

 * not use this file except in compliance with the License. You may obtain

 * a copy of the License at http://www.apache.org/licenses/LICENSE-2.0.

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express

 * or implied. See the License for the specific language governing

 * permissions and limitations under the License.

 *

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <freerdp/types.h>

#include <freerdp/primitives.h>

#include "prim_internal.h"

/* ----------------------------------------------------------------------------

 * 16-bit signed add with saturation (under and over).

 */

static pstatus_t general_add_16s(const INT16* pSrc1, const INT16* pSrc2, INT16* pDst, UINT32 len)

{

	while (len--)

	{

		INT32 k = (INT32)(*pSrc1++) + (INT32)(*pSrc2++);

		if (k > 32767)

			*pDst++ = ((INT16)32767);

		else if (k < -32768)

			*pDst++ = ((INT16)-32768);

		else

			*pDst++ = (INT16)k;

	}

	return PRIMITIVES_SUCCESS;

}

/* ------------------------------------------------------------------------- */

void primitives_init_add(primitives_t* prims)

{

	prims->add_16s = general_add_16s;

}