mirror of https://github.com/qt/qtdatavis3d.git
119 lines
4.1 KiB
C
119 lines
4.1 KiB
C
/****************************************************************************
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* *
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* OpenNI 1.x Alpha *
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* Copyright (C) 2011 PrimeSense Ltd. *
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* *
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* This file is part of OpenNI. *
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* *
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* OpenNI is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU Lesser General Public License as published *
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* by the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* OpenNI is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU Lesser General Public License *
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* along with OpenNI. If not, see <http://www.gnu.org/licenses/>. *
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* *
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****************************************************************************/
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#ifndef __XN_GENERAL_BUFFER_H__
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#define __XN_GENERAL_BUFFER_H__
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//---------------------------------------------------------------------------
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// Includes
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//---------------------------------------------------------------------------
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#include "XnPlatform.h"
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#include "XnOS.h"
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#include "XnStatusCodes.h"
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//---------------------------------------------------------------------------
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// Types
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//---------------------------------------------------------------------------
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/* Describes a general buffer. */
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typedef struct XnGeneralBuffer
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{
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/* A pointer to the actual data. */
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void* pData;
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/* The size of the data in bytes. */
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XnUInt32 nDataSize;
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} XnGeneralBuffer;
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//---------------------------------------------------------------------------
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// Exported Functions
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//---------------------------------------------------------------------------
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/**
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* Packs a pointer and a size into an XnGeneralBuffer struct.
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*/
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inline XnGeneralBuffer XnGeneralBufferPack(void* pData, XnUInt32 nDataSize)
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{
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XnGeneralBuffer result;
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result.pData = pData;
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result.nDataSize = nDataSize;
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return result;
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}
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/**
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* Copies one general buffer into another.
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*/
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inline XnStatus XnGeneralBufferCopy(XnGeneralBuffer* pDest, const XnGeneralBuffer* pSrc)
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{
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XN_VALIDATE_INPUT_PTR(pDest);
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XN_VALIDATE_INPUT_PTR(pSrc);
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if (pSrc->nDataSize > pDest->nDataSize)
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return XN_STATUS_OUTPUT_BUFFER_OVERFLOW;
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xnOSMemCopy(pDest->pData, pSrc->pData, pSrc->nDataSize);
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pDest->nDataSize = pSrc->nDataSize;
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return XN_STATUS_OK;
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}
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inline XnStatus XnGeneralBufferAlloc(XnGeneralBuffer* pDest, XnUInt32 nSize)
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{
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XN_VALIDATE_INPUT_PTR(pDest);
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void* pData;
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pData = xnOSMalloc(nSize);
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XN_VALIDATE_ALLOC_PTR(pData);
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pDest->pData = pData;
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pDest->nDataSize = nSize;
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return XN_STATUS_OK;
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}
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inline XnStatus XnGeneralBufferRealloc(XnGeneralBuffer* pDest, XnUInt32 nSize)
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{
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XN_VALIDATE_INPUT_PTR(pDest);
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void* pData;
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pData = xnOSRealloc(pDest, nSize);
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XN_VALIDATE_ALLOC_PTR(pData);
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pDest->pData = pData;
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pDest->nDataSize = nSize;
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return XN_STATUS_OK;
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}
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inline void XnGeneralBufferFree(XnGeneralBuffer* pDest)
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{
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XN_FREE_AND_NULL(pDest->pData);
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pDest->nDataSize = 0;
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}
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//---------------------------------------------------------------------------
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// Helper Macros
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//---------------------------------------------------------------------------
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#define XN_PACK_GENERAL_BUFFER(x) XnGeneralBufferPack(&x, sizeof(x))
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#define XN_VALIDATE_GENERAL_BUFFER_TYPE(gb, t) \
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if ((gb).nDataSize != sizeof(t)) \
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{ \
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return XN_STATUS_INVALID_BUFFER_SIZE; \
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}
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#endif //__XN_GENERAL_BUFFER_H__
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