src/brains/DataStorage.cpp

/*
 * Copyright (c) 2005 The University of Notre Dame. All Rights Reserved.
 *
 * The University of Notre Dame grants you ("Licensee") a
 * non-exclusive, royalty free, license to use, modify and
 * redistribute this software in source and binary code form, provided
 * that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the
 *    distribution.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. All express or implied conditions, representations and
 * warranties, including any implied warranty of merchantability,
 * fitness for a particular purpose or non-infringement, are hereby
 * excluded.  The University of Notre Dame and its licensors shall not
 * be liable for any damages suffered by licensee as a result of
 * using, modifying or distributing the software or its
 * derivatives. In no event will the University of Notre Dame or its
 * licensors be liable for any lost revenue, profit or data, or for
 * direct, indirect, special, consequential, incidental or punitive
 * damages, however caused and regardless of the theory of liability,
 * arising out of the use of or inability to use software, even if the
 * University of Notre Dame has been advised of the possibility of
 * such damages.
 *
 * SUPPORT OPEN SCIENCE!  If you use OpenMD or its source code in your
 * research, please cite the appropriate papers when you publish your
 * work.  Good starting points are:
 *                                                                      
 * [1]  Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).             
 * [2]  Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).          
 * [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).          
 * [4]  Vardeman & Gezelter, in progress (2009).                        
 */
 
/**
 * @file DataStorage.cpp
 * @author tlin
 * @date 10/26/2004
 * @time 11:56am
 * @version 1.0
 */

#include "brains/DataStorage.hpp"

namespace OpenMD {

  DataStorage::DataStorage() : size_(0), storageLayout_(0){

  }

  DataStorage::DataStorage(int size, int storageLayout) : size_(size){
    setStorageLayout(storageLayout);
    resize(size);
  }

  int DataStorage::getSize() {

    if (storageLayout_ & dslPosition && position.size() != size_) {
      //error
      std::cerr << "size does not match"<< std::endl;
    }

    if (storageLayout_ & dslVelocity && velocity.size() != size_) {
      //error
      std::cerr << "size does not match"<< std::endl;        
    }

    if (storageLayout_ & dslAmat && aMat.size() != size_) {
      //error
      std::cerr << "size does not match"<< std::endl;        
    }

    if (storageLayout_ & dslAngularMomentum && angularMomentum.size() != size_) {
      //error
      std::cerr << "size does not match"<< std::endl;        
    }

    if (storageLayout_ & dslElectroFrame && electroFrame.size() != size_) {
      //error
      std::cerr << "size does not match"<< std::endl;        
    }

    if (storageLayout_ & dslZAngle && zAngle.size() != size_) {
      //error
      std::cerr << "size does not match"<< std::endl;        
    }

    if (storageLayout_ & dslForce && force.size() != size_) {
      //error
      std::cerr << "size does not match"<< std::endl;        
    }

    if (storageLayout_ & dslTorque && torque.size() != size_) {
      //error
      std::cerr << "size does not match"<< std::endl;        
    }

    if (storageLayout_ & dslParticlePot && particlePot.size() != size_) {
      //error
      std::cerr << "size does not match"<< std::endl;        
    }

    if (storageLayout_ & dslDensity && density.size() != size_) {
      //error
      std::cerr << "size does not match"<< std::endl;        
    }

    if (storageLayout_ & dslFunctional && functional.size() != size_) {
      //error
      std::cerr << "size does not match"<< std::endl;        
    }

    if (storageLayout_ & dslFunctionalDerivative && functionalDerivative.size() != size_) {
      //error
      std::cerr << "size does not match"<< std::endl;        
    }

    if (storageLayout_ & dslElectricField && electricField.size() != size_) {
      //error
      std::cerr << "size does not match"<< std::endl;        
    }

    if (storageLayout_ & dslSkippedCharge && skippedCharge.size() != size_) {
      //error
      std::cerr << "size does not match"<< std::endl;        
    }
    
    return size_;

  }

  void DataStorage::resize(int newSize) {

    if (storageLayout_ & dslPosition) {
      internalResize(position, newSize);
    }

    if (storageLayout_ & dslVelocity) {
      internalResize(velocity, newSize);
    }

    if (storageLayout_ & dslAmat) {
      internalResize(aMat, newSize);
    }

    if (storageLayout_ & dslAngularMomentum) {
      internalResize(angularMomentum, newSize);
    }

    if (storageLayout_ & dslElectroFrame) {
      internalResize(electroFrame, newSize);
    }
    
    if (storageLayout_ & dslZAngle) {
      internalResize(zAngle, newSize);
    }

    if (storageLayout_ & dslForce) {
      internalResize(force, newSize);
    }

    if (storageLayout_ & dslTorque) {
      internalResize(torque, newSize);
    }

    if (storageLayout_ & dslParticlePot) {
      internalResize(particlePot, newSize);
    }

    if (storageLayout_ & dslDensity) {
      internalResize(density, newSize);
    }

    if (storageLayout_ & dslFunctional) {
      internalResize(functional, newSize);
    }

    if (storageLayout_ & dslFunctionalDerivative) {
      internalResize(functionalDerivative, newSize);
    }

    if (storageLayout_ & dslElectricField) {
      internalResize(electricField, newSize);
    }

    if (storageLayout_ & dslSkippedCharge) {
      internalResize(skippedCharge, newSize);
    }

    size_ = newSize;
  }

  void DataStorage::reserve(int size) {
    if (storageLayout_ & dslPosition) {
      position.reserve(size);
    } 

    if (storageLayout_ & dslVelocity) {
      velocity.reserve(size);
    } 

    if (storageLayout_ & dslAmat) {
      aMat.reserve(size);
    } 

    if (storageLayout_ & dslAngularMomentum) {
      angularMomentum.reserve(size);
    } 

    if (storageLayout_ & dslElectroFrame) {
      electroFrame.reserve(size);
    }
    
    if (storageLayout_ & dslZAngle) {
      zAngle.reserve(size);
    }

    if (storageLayout_ & dslForce) {
      force.reserve(size);
    } 

    if (storageLayout_ & dslTorque) {
      torque.reserve(size);
    }
    
    if (storageLayout_ & dslParticlePot) {
      particlePot.reserve(size);
    }

    if (storageLayout_ & dslDensity) {
      density.reserve(size);
    }

    if (storageLayout_ & dslFunctional) {
      functional.reserve(size);
    }

    if (storageLayout_ & dslFunctionalDerivative) {
      functionalDerivative.reserve(size);
    }

    if (storageLayout_ & dslElectricField) {
      electricField.reserve(size);
    }

    if (storageLayout_ & dslSkippedCharge) {
      skippedCharge.reserve(size);
    }

  }

  void DataStorage::copy(int source, int num, int target) {
    if (num + target > size_ ) {
      //error
    }
    
    if (storageLayout_ & dslPosition) {
      internalCopy(position, source, num, target);
    } 

    if (storageLayout_ & dslVelocity) {
      internalCopy(velocity, source, num, target);
    } 

    if (storageLayout_ & dslAmat) {
      internalCopy(aMat, source, num, target);
    } 

    if (storageLayout_ & dslAngularMomentum) {
      internalCopy(angularMomentum, source, num, target);
    } 

    if (storageLayout_ & dslElectroFrame) {
      internalCopy(electroFrame, source, num, target);
    }
    
    if (storageLayout_ & dslZAngle) {
      internalCopy(zAngle, source, num, target);
    }

    if (storageLayout_ & dslForce) {
      internalCopy(force, source, num, target);
    } 

    if (storageLayout_ & dslTorque) {
      internalCopy(torque, source, num, target); 
    }

    if (storageLayout_ & dslParticlePot) {
      internalCopy(particlePot, source, num, target); 
    }

    if (storageLayout_ & dslDensity) {
      internalCopy(density, source, num, target);
    }

    if (storageLayout_ & dslFunctional) {
      internalCopy(functional, source, num, target);
    }

    if (storageLayout_ & dslFunctionalDerivative) {
      internalCopy(functionalDerivative, source, num, target);
    }

    if (storageLayout_ & dslElectricField) {
      internalCopy(electricField, source, num, target);
    }

    if (storageLayout_ & dslSkippedCharge) {
      internalCopy(skippedCharge, source, num, target);
    }
  }

  int DataStorage::getStorageLayout() {
    return storageLayout_;
  }

  void DataStorage::setStorageLayout(int layout) {
    storageLayout_ = layout;
    resize(size_);
  }

  RealType* DataStorage::getArrayPointer(int whichArray) {

    switch (whichArray) {
    case dslPosition:
      return internalGetArrayPointer(position);
      break;
            
    case dslVelocity:
      return internalGetArrayPointer(velocity);
      break;
            
    case dslAmat:
      return internalGetArrayPointer(aMat);
      break;            
            
    case dslAngularMomentum:
      return internalGetArrayPointer(angularMomentum);
      break;
            
    case dslElectroFrame:
      return internalGetArrayPointer(electroFrame);
      break;
            
    case dslZAngle:
      return internalGetArrayPointer(zAngle);
      break;

    case dslForce:
      return internalGetArrayPointer(force);
      break;            

    case dslTorque:
      return internalGetArrayPointer(torque);
      break;

    case dslParticlePot:
      return internalGetArrayPointer(particlePot);
      break;

    case dslDensity:
      return internalGetArrayPointer(density);
      break;

    case dslFunctional:
      return internalGetArrayPointer(functional);
      break;

    case dslFunctionalDerivative:
      return internalGetArrayPointer(functionalDerivative);
      break;

    case dslElectricField:
      return internalGetArrayPointer(electricField);
      break;

    case dslSkippedCharge:
      return internalGetArrayPointer(skippedCharge);
      break;
           
    default:
      //error message
      return NULL;

    }
  }    

  RealType* DataStorage::internalGetArrayPointer(std::vector<Vector3d>& v) {
    if (v.size() == 0) {
      return NULL;
    } else {
      return v[0].getArrayPointer();
    }
  }

  RealType* DataStorage::internalGetArrayPointer(std::vector<RotMat3x3d>& v) {
    if (v.size() == 0) {
      return NULL;
    } else {
      return v[0].getArrayPointer();
    }

  }

  RealType* DataStorage::internalGetArrayPointer(std::vector<RealType>& v) {
    if (v.size() == 0) {
      return NULL;
    } else {
      return &(v[0]);
    }

  }    

  template<typename T>
  void DataStorage::internalResize(std::vector<T>& v, int newSize){
    int oldSize = v.size();

    if (oldSize == newSize) {
      return;
    } else if (oldSize < newSize) {
      v.insert(v.end(), newSize-oldSize, T());
    } else {
      typename std::vector<T>::iterator i;
      i = v.begin();
      std::advance(i, newSize);        
      v.erase(i, v.end());
    }
  }

  template<typename T>
  void DataStorage::internalCopy(std::vector<T>& v, int source,  int num, int target) {
    typename std::vector<T>::iterator first;
    typename std::vector<T>::iterator last;
    typename std::vector<T>::iterator result;

    first = v.begin();
    last = v.begin();
    result = v.begin();

    std::advance(first, source);
    //STL algorithm use half opened range
    std::advance(last, num + 1);
    std::advance(result, target );

    std::copy(first, last, result);
  }

  int DataStorage::getBytesPerStuntDouble(int layout) {
    int bytes = 0;
    if (layout & dslPosition) {
      bytes += sizeof(Vector3d);
    }
    if (layout & dslVelocity) {
      bytes += sizeof(Vector3d);
    }
    if (layout & dslAmat) {
      bytes += sizeof(RotMat3x3d);    
    }
    if (layout & dslAngularMomentum) {
      bytes += sizeof(Vector3d);
    }
    if (layout & dslElectroFrame) {
      bytes += sizeof(Mat3x3d);
    }
    if (layout & dslZAngle) {
      bytes += sizeof(RealType);
    }
    if (layout & dslForce) {
      bytes += sizeof(Vector3d);
    }
    if (layout & dslTorque) {
      bytes += sizeof(Vector3d);
    }
    if (layout & dslParticlePot) {
      bytes += sizeof(RealType);
    }
    if (layout & dslDensity) {
      bytes += sizeof(RealType);
    }
    if (layout & dslFunctional) {
      bytes += sizeof(RealType);
    }
    if (layout & dslFunctionalDerivative) {
      bytes += sizeof(RealType);
    }
    if (layout & dslElectricField) {
      bytes += sizeof(Vector3d);
    }
    if (layout & dslSkippedCharge) {
      bytes += sizeof(RealType);
    }

    return bytes;
  }

}
Revision:	1584
Committed:	Fri Jun 17 20:16:35 2011 UTC (13 years, 10 months ago) by gezelter
File size:	13016 byte(s)
Log Message:	bug fixes.
#	Content
1	/*
2	* Copyright (c) 2005 The University of Notre Dame. All Rights Reserved.
3	*
4	* The University of Notre Dame grants you ("Licensee") a
5	* non-exclusive, royalty free, license to use, modify and
6	* redistribute this software in source and binary code form, provided
7	* that the following conditions are met:
8	*
9	* 1. Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.
11	*
12	* 2. Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the
15	* distribution.
16	*
17	* This software is provided "AS IS," without a warranty of any
18	* kind. All express or implied conditions, representations and
19	* warranties, including any implied warranty of merchantability,
20	* fitness for a particular purpose or non-infringement, are hereby
21	* excluded. The University of Notre Dame and its licensors shall not
22	* be liable for any damages suffered by licensee as a result of
23	* using, modifying or distributing the software or its
24	* derivatives. In no event will the University of Notre Dame or its
25	* licensors be liable for any lost revenue, profit or data, or for
26	* direct, indirect, special, consequential, incidental or punitive
27	* damages, however caused and regardless of the theory of liability,
28	* arising out of the use of or inability to use software, even if the
29	* University of Notre Dame has been advised of the possibility of
30	* such damages.
31	*
32	* SUPPORT OPEN SCIENCE! If you use OpenMD or its source code in your
33	* research, please cite the appropriate papers when you publish your
34	* work. Good starting points are:
35	*
36	* [1] Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).
37	* [2] Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).
38	* [3] Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).
39	* [4] Vardeman & Gezelter, in progress (2009).
40	*/
41
42	/**
43	* @file DataStorage.cpp
44	* @author tlin
45	* @date 10/26/2004
46	* @time 11:56am
47	* @version 1.0
48	*/
49
50	#include "brains/DataStorage.hpp"
51
52	namespace OpenMD {
53
54	DataStorage::DataStorage() : size_(0), storageLayout_(0){
55
56	}
57
58	DataStorage::DataStorage(int size, int storageLayout) : size_(size){
59	setStorageLayout(storageLayout);
60	resize(size);
61	}
62
63	int DataStorage::getSize() {
64
65	if (storageLayout_ & dslPosition && position.size() != size_) {
66	//error
67	std::cerr << "size does not match"<< std::endl;
68	}
69
70	if (storageLayout_ & dslVelocity && velocity.size() != size_) {
71	//error
72	std::cerr << "size does not match"<< std::endl;
73	}
74
75	if (storageLayout_ & dslAmat && aMat.size() != size_) {
76	//error
77	std::cerr << "size does not match"<< std::endl;
78	}
79
80	if (storageLayout_ & dslAngularMomentum && angularMomentum.size() != size_) {
81	//error
82	std::cerr << "size does not match"<< std::endl;
83	}
84
85	if (storageLayout_ & dslElectroFrame && electroFrame.size() != size_) {
86	//error
87	std::cerr << "size does not match"<< std::endl;
88	}
89
90	if (storageLayout_ & dslZAngle && zAngle.size() != size_) {
91	//error
92	std::cerr << "size does not match"<< std::endl;
93	}
94
95	if (storageLayout_ & dslForce && force.size() != size_) {
96	//error
97	std::cerr << "size does not match"<< std::endl;
98	}
99
100	if (storageLayout_ & dslTorque && torque.size() != size_) {
101	//error
102	std::cerr << "size does not match"<< std::endl;
103	}
104
105	if (storageLayout_ & dslParticlePot && particlePot.size() != size_) {
106	//error
107	std::cerr << "size does not match"<< std::endl;
108	}
109
110	if (storageLayout_ & dslDensity && density.size() != size_) {
111	//error
112	std::cerr << "size does not match"<< std::endl;
113	}
114
115	if (storageLayout_ & dslFunctional && functional.size() != size_) {
116	//error
117	std::cerr << "size does not match"<< std::endl;
118	}
119
120	if (storageLayout_ & dslFunctionalDerivative && functionalDerivative.size() != size_) {
121	//error
122	std::cerr << "size does not match"<< std::endl;
123	}
124
125	if (storageLayout_ & dslElectricField && electricField.size() != size_) {
126	//error
127	std::cerr << "size does not match"<< std::endl;
128	}
129
130	if (storageLayout_ & dslSkippedCharge && skippedCharge.size() != size_) {
131	//error
132	std::cerr << "size does not match"<< std::endl;
133	}
134
135	return size_;
136
137	}
138
139	void DataStorage::resize(int newSize) {
140
141	if (storageLayout_ & dslPosition) {
142	internalResize(position, newSize);
143	}
144
145	if (storageLayout_ & dslVelocity) {
146	internalResize(velocity, newSize);
147	}
148
149	if (storageLayout_ & dslAmat) {
150	internalResize(aMat, newSize);
151	}
152
153	if (storageLayout_ & dslAngularMomentum) {
154	internalResize(angularMomentum, newSize);
155	}
156
157	if (storageLayout_ & dslElectroFrame) {
158	internalResize(electroFrame, newSize);
159	}
160
161	if (storageLayout_ & dslZAngle) {
162	internalResize(zAngle, newSize);
163	}
164
165	if (storageLayout_ & dslForce) {
166	internalResize(force, newSize);
167	}
168
169	if (storageLayout_ & dslTorque) {
170	internalResize(torque, newSize);
171	}
172
173	if (storageLayout_ & dslParticlePot) {
174	internalResize(particlePot, newSize);
175	}
176
177	if (storageLayout_ & dslDensity) {
178	internalResize(density, newSize);
179	}
180
181	if (storageLayout_ & dslFunctional) {
182	internalResize(functional, newSize);
183	}
184
185	if (storageLayout_ & dslFunctionalDerivative) {
186	internalResize(functionalDerivative, newSize);
187	}
188
189	if (storageLayout_ & dslElectricField) {
190	internalResize(electricField, newSize);
191	}
192
193	if (storageLayout_ & dslSkippedCharge) {
194	internalResize(skippedCharge, newSize);
195	}
196
197	size_ = newSize;
198	}
199
200	void DataStorage::reserve(int size) {
201	if (storageLayout_ & dslPosition) {
202	position.reserve(size);
203	}
204
205	if (storageLayout_ & dslVelocity) {
206	velocity.reserve(size);
207	}
208
209	if (storageLayout_ & dslAmat) {
210	aMat.reserve(size);
211	}
212
213	if (storageLayout_ & dslAngularMomentum) {
214	angularMomentum.reserve(size);
215	}
216
217	if (storageLayout_ & dslElectroFrame) {
218	electroFrame.reserve(size);
219	}
220
221	if (storageLayout_ & dslZAngle) {
222	zAngle.reserve(size);
223	}
224
225	if (storageLayout_ & dslForce) {
226	force.reserve(size);
227	}
228
229	if (storageLayout_ & dslTorque) {
230	torque.reserve(size);
231	}
232
233	if (storageLayout_ & dslParticlePot) {
234	particlePot.reserve(size);
235	}
236
237	if (storageLayout_ & dslDensity) {
238	density.reserve(size);
239	}
240
241	if (storageLayout_ & dslFunctional) {
242	functional.reserve(size);
243	}
244
245	if (storageLayout_ & dslFunctionalDerivative) {
246	functionalDerivative.reserve(size);
247	}
248
249	if (storageLayout_ & dslElectricField) {
250	electricField.reserve(size);
251	}
252
253	if (storageLayout_ & dslSkippedCharge) {
254	skippedCharge.reserve(size);
255	}
256
257	}
258
259	void DataStorage::copy(int source, int num, int target) {
260	if (num + target > size_ ) {
261	//error
262	}
263
264	if (storageLayout_ & dslPosition) {
265	internalCopy(position, source, num, target);
266	}
267
268	if (storageLayout_ & dslVelocity) {
269	internalCopy(velocity, source, num, target);
270	}
271
272	if (storageLayout_ & dslAmat) {
273	internalCopy(aMat, source, num, target);
274	}
275
276	if (storageLayout_ & dslAngularMomentum) {
277	internalCopy(angularMomentum, source, num, target);
278	}
279
280	if (storageLayout_ & dslElectroFrame) {
281	internalCopy(electroFrame, source, num, target);
282	}
283
284	if (storageLayout_ & dslZAngle) {
285	internalCopy(zAngle, source, num, target);
286	}
287
288	if (storageLayout_ & dslForce) {
289	internalCopy(force, source, num, target);
290	}
291
292	if (storageLayout_ & dslTorque) {
293	internalCopy(torque, source, num, target);
294	}
295
296	if (storageLayout_ & dslParticlePot) {
297	internalCopy(particlePot, source, num, target);
298	}
299
300	if (storageLayout_ & dslDensity) {
301	internalCopy(density, source, num, target);
302	}
303
304	if (storageLayout_ & dslFunctional) {
305	internalCopy(functional, source, num, target);
306	}
307
308	if (storageLayout_ & dslFunctionalDerivative) {
309	internalCopy(functionalDerivative, source, num, target);
310	}
311
312	if (storageLayout_ & dslElectricField) {
313	internalCopy(electricField, source, num, target);
314	}
315
316	if (storageLayout_ & dslSkippedCharge) {
317	internalCopy(skippedCharge, source, num, target);
318	}
319	}
320
321	int DataStorage::getStorageLayout() {
322	return storageLayout_;
323	}
324
325	void DataStorage::setStorageLayout(int layout) {
326	storageLayout_ = layout;
327	resize(size_);
328	}
329
330	RealType* DataStorage::getArrayPointer(int whichArray) {
331
332	switch (whichArray) {
333	case dslPosition:
334	return internalGetArrayPointer(position);
335	break;
336
337	case dslVelocity:
338	return internalGetArrayPointer(velocity);
339	break;
340
341	case dslAmat:
342	return internalGetArrayPointer(aMat);
343	break;
344
345	case dslAngularMomentum:
346	return internalGetArrayPointer(angularMomentum);
347	break;
348
349	case dslElectroFrame:
350	return internalGetArrayPointer(electroFrame);
351	break;
352
353	case dslZAngle:
354	return internalGetArrayPointer(zAngle);
355	break;
356
357	case dslForce:
358	return internalGetArrayPointer(force);
359	break;
360
361	case dslTorque:
362	return internalGetArrayPointer(torque);
363	break;
364
365	case dslParticlePot:
366	return internalGetArrayPointer(particlePot);
367	break;
368
369	case dslDensity:
370	return internalGetArrayPointer(density);
371	break;
372
373	case dslFunctional:
374	return internalGetArrayPointer(functional);
375	break;
376
377	case dslFunctionalDerivative:
378	return internalGetArrayPointer(functionalDerivative);
379	break;
380
381	case dslElectricField:
382	return internalGetArrayPointer(electricField);
383	break;
384
385	case dslSkippedCharge:
386	return internalGetArrayPointer(skippedCharge);
387	break;
388
389	default:
390	//error message
391	return NULL;
392
393	}
394	}
395
396	RealType* DataStorage::internalGetArrayPointer(std::vector<Vector3d>& v) {
397	if (v.size() == 0) {
398	return NULL;
399	} else {
400	return v[0].getArrayPointer();
401	}
402	}
403
404	RealType* DataStorage::internalGetArrayPointer(std::vector<RotMat3x3d>& v) {
405	if (v.size() == 0) {
406	return NULL;
407	} else {
408	return v[0].getArrayPointer();
409	}
410
411	}
412
413	RealType* DataStorage::internalGetArrayPointer(std::vector<RealType>& v) {
414	if (v.size() == 0) {
415	return NULL;
416	} else {
417	return &(v[0]);
418	}
419
420	}
421
422	template<typename T>
423	void DataStorage::internalResize(std::vector<T>& v, int newSize){
424	int oldSize = v.size();
425
426	if (oldSize == newSize) {
427	return;
428	} else if (oldSize < newSize) {
429	v.insert(v.end(), newSize-oldSize, T());
430	} else {
431	typename std::vector<T>::iterator i;
432	i = v.begin();
433	std::advance(i, newSize);
434	v.erase(i, v.end());
435	}
436	}
437
438	template<typename T>
439	void DataStorage::internalCopy(std::vector<T>& v, int source, int num, int target) {
440	typename std::vector<T>::iterator first;
441	typename std::vector<T>::iterator last;
442	typename std::vector<T>::iterator result;
443
444	first = v.begin();
445	last = v.begin();
446	result = v.begin();
447
448	std::advance(first, source);
449	//STL algorithm use half opened range
450	std::advance(last, num + 1);
451	std::advance(result, target );
452
453	std::copy(first, last, result);
454	}
455
456	int DataStorage::getBytesPerStuntDouble(int layout) {
457	int bytes = 0;
458	if (layout & dslPosition) {
459	bytes += sizeof(Vector3d);
460	}
461	if (layout & dslVelocity) {
462	bytes += sizeof(Vector3d);
463	}
464	if (layout & dslAmat) {
465	bytes += sizeof(RotMat3x3d);
466	}
467	if (layout & dslAngularMomentum) {
468	bytes += sizeof(Vector3d);
469	}
470	if (layout & dslElectroFrame) {
471	bytes += sizeof(Mat3x3d);
472	}
473	if (layout & dslZAngle) {
474	bytes += sizeof(RealType);
475	}
476	if (layout & dslForce) {
477	bytes += sizeof(Vector3d);
478	}
479	if (layout & dslTorque) {
480	bytes += sizeof(Vector3d);
481	}
482	if (layout & dslParticlePot) {
483	bytes += sizeof(RealType);
484	}
485	if (layout & dslDensity) {
486	bytes += sizeof(RealType);
487	}
488	if (layout & dslFunctional) {
489	bytes += sizeof(RealType);
490	}
491	if (layout & dslFunctionalDerivative) {
492	bytes += sizeof(RealType);
493	}
494	if (layout & dslElectricField) {
495	bytes += sizeof(Vector3d);
496	}
497	if (layout & dslSkippedCharge) {
498	bytes += sizeof(RealType);
499	}
500
501	return bytes;
502	}
503
504	}