72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/* FreeRDP: A Remote Desktop Protocol Client
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* Add operations.
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* vi:ts=4 sw=4:
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*
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* (c) Copyright 2012 Hewlett-Packard Development Company, L.P.
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License. You may obtain
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* a copy of the License at http://www.apache.org/licenses/LICENSE-2.0.
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*
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*/
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#include <freerdp/config.h>
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#include <stdint.h>
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#include <freerdp/types.h>
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#include <freerdp/primitives.h>
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#include "prim_internal.h"
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/* ----------------------------------------------------------------------------
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* 16-bit signed add with saturation (under and over).
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*/
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static pstatus_t general_add_16s(const INT16* WINPR_RESTRICT pSrc1,
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const INT16* WINPR_RESTRICT pSrc2, INT16* WINPR_RESTRICT pDst,
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UINT32 len)
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{
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while (len--)
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{
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INT32 k = (INT32)(*pSrc1++) + (INT32)(*pSrc2++);
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if (k > INT16_MAX)
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*pDst++ = ((INT16)INT16_MAX);
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else if (k < INT16_MIN)
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*pDst++ = ((INT16)INT16_MIN);
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else
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*pDst++ = (INT16)k;
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}
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return PRIMITIVES_SUCCESS;
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}
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static pstatus_t general_add_16s_inplace(INT16* WINPR_RESTRICT pSrcDst,
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const INT16* WINPR_RESTRICT pSrc, UINT32 len)
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{
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while (len--)
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{
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INT32 k = (INT32)(*pSrcDst) + (INT32)(*pSrc++);
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if (k > INT16_MAX)
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*pSrcDst++ = ((INT16)INT16_MAX);
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else if (k < INT16_MIN)
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*pSrcDst++ = ((INT16)INT16_MIN);
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else
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*pSrcDst++ = (INT16)k;
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}
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return PRIMITIVES_SUCCESS;
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}
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/* ------------------------------------------------------------------------- */
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void primitives_init_add(primitives_t* prims)
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{
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prims->add_16s = general_add_16s;
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prims->add_16s_inplace = general_add_16s_inplace;
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}
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