/* FreeRDP: A Remote Desktop Protocol Client

 * Shift 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"

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

static INLINE pstatus_t general_lShiftC_16s(

    const INT16* pSrc,

    UINT32 val,

    INT16* pDst,

    UINT32 len)

{

	if (val == 0) return PRIMITIVES_SUCCESS;

	while (len--) *pDst++ = *pSrc++ << val;

	return PRIMITIVES_SUCCESS;

}

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

static INLINE pstatus_t general_rShiftC_16s(

    const INT16* pSrc,

    UINT32 val,

    INT16* pDst,

    UINT32 len)

{

	if (val == 0) return PRIMITIVES_SUCCESS;

	while (len--) *pDst++ = *pSrc++ >> val;

	return PRIMITIVES_SUCCESS;

}

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

static INLINE pstatus_t general_lShiftC_16u(

    const UINT16* pSrc,

    UINT32 val,

    UINT16* pDst,

    UINT32 len)

{

	if (val == 0) return PRIMITIVES_SUCCESS;

	while (len--) *pDst++ = *pSrc++ << val;

	return PRIMITIVES_SUCCESS;

}

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

static INLINE pstatus_t general_rShiftC_16u(

    const UINT16* pSrc,

    UINT32 val,

    UINT16* pDst,

    UINT32 len)

{

	if (val == 0) return PRIMITIVES_SUCCESS;

	while (len--) *pDst++ = *pSrc++ >> val;

	return PRIMITIVES_SUCCESS;

}

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

static INLINE pstatus_t general_shiftC_16s(

    const INT16* pSrc,

    INT32 val,

    INT16* pDst,

    UINT32 len)

{

	if (val == 0) return PRIMITIVES_SUCCESS;

	if (val < 0) return general_rShiftC_16s(pSrc, -val, pDst, len);

	else         return general_lShiftC_16s(pSrc,  val, pDst, len);

}

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

static INLINE pstatus_t general_shiftC_16u(

    const UINT16* pSrc,

    INT32 val,

    UINT16* pDst,

    UINT32 len)

{

	if (val == 0) return PRIMITIVES_SUCCESS;

	if (val < 0) return general_rShiftC_16u(pSrc, -val, pDst, len);

	else         return general_lShiftC_16u(pSrc,  val, pDst, len);

}

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

void primitives_init_shift(

    primitives_t* prims)

{

	/* Start with the default. */

	prims->lShiftC_16s = general_lShiftC_16s;

	prims->rShiftC_16s = general_rShiftC_16s;

	prims->lShiftC_16u = general_lShiftC_16u;

	prims->rShiftC_16u = general_rShiftC_16u;

	/* Wrappers */

	prims->shiftC_16s  = general_shiftC_16s;

	prims->shiftC_16u  = general_shiftC_16u;

}