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88 lines
2.6 KiB
C++
Executable File
88 lines
2.6 KiB
C++
Executable File
// Created on: 2007-03-07
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// Created by: msv@EUCLIDEX
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// Copyright (c) 2007-2012 OPEN CASCADE SAS
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//
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// The content of this file is subject to the Open CASCADE Technology Public
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// License Version 6.5 (the "License"). You may not use the content of this file
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// except in compliance with the License. Please obtain a copy of the License
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// at http://www.opencascade.org and read it completely before using this file.
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//
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// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
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// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
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//
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// The Original Code and all software distributed under the License is
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// distributed on an "AS IS" basis, without warranty of any kind, and the
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// Initial Developer hereby disclaims all such warranties, including without
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// limitation, any warranties of merchantability, fitness for a particular
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// purpose or non-infringement. Please see the License for the specific terms
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// and conditions governing the rights and limitations under the License.
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#ifndef MeshVS_Buffer_HeaderFile
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#define MeshVS_Buffer_HeaderFile
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#include <Standard.hxx>
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/**
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* General purpose buffer that is allocated on the stack with a
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* constant size MeshVS_BufSize, or is allocated dynamically if the requested
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* size exceeds the standard one.
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* It is useful when an allocation of an array of unknown size is needed,
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* and most often the array is small enough to allocate as automatic C array.
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*/
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//! define the constant to the size of 10 points
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#define MeshVS_BufSize 10*3*sizeof(double)
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class MeshVS_Buffer
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{
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public:
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//! Constructor of the buffer of the requested size
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MeshVS_Buffer (const Standard_Size theSize)
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: myDynData (0)
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{
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if (theSize > MeshVS_BufSize)
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myDynData = Standard::Allocate (theSize);
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}
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//! Destructor
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~MeshVS_Buffer()
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{
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if (myDynData)
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{
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Standard::Free (myDynData);
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myDynData = 0;
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}
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}
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//! Cast the buffer to the void pointer
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operator void* ()
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{
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return myDynData ? myDynData : (void*) myAutoData;
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}
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//! Interpret the buffer as a reference to double
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operator Standard_Real& ()
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{
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return * (myDynData ? (Standard_Real*) myDynData : (Standard_Real*) myAutoData);
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}
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//! Interpret the buffer as a reference to int
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operator Standard_Integer& ()
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{
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return * (myDynData ? (Standard_Integer*) myDynData : (Standard_Integer*) myAutoData);
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}
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private:
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//! Deprecate copy constructor
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MeshVS_Buffer(const MeshVS_Buffer&) {}
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//! Deprecate copy operation
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MeshVS_Buffer& operator=(const MeshVS_Buffer&) {return *this;}
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char myAutoData[ MeshVS_BufSize ];
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void* myDynData;
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};
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#endif
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