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/* Ergo, version 3.8.2, a program for linear scaling electronic structure
* calculations.
* Copyright (C) 2023 Elias Rudberg, Emanuel H. Rubensson, Pawel Salek,
* and Anastasia Kruchinina.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Primary academic reference:
* Ergo: An open-source program for linear-scaling electronic structure
* calculations,
* Elias Rudberg, Emanuel H. Rubensson, Pawel Salek, and Anastasia
* Kruchinina,
* SoftwareX 7, 107 (2018),
* <http://dx.doi.org/10.1016/j.softx.2018.03.005>
*
* For further information about Ergo, see <http://www.ergoscf.org>.
*/
/** @file serialization_tools.h
\brief Tools to simplify serialization of e.g. std::vector
objects, useful when writing serialization functions needed for
Chunks and Tasks usage.
@author: Elias Rudberg <em>responsible</em>.
*/
#ifndef SERIALIZATION_TOOLS_HEADER
#define SERIALIZATION_TOOLS_HEADER
#include <vector>
/* general std::vector serialization template code */
template <typename VectorType>
size_t std_vector_getSize(const VectorType & v) {
// One size_t for storing the number of elements, plus the space needed for the elements themselves.
size_t sizeOfOneElement = sizeof(typename VectorType::value_type);
return sizeof(size_t) + v.size() * sizeOfOneElement;
}
typedef char* CharPtrType;
template <typename VectorType>
void std_vector_writeToBuffer_and_move_ptr(const VectorType & v, CharPtrType & p) {
size_t nElements = v.size();
memcpy(p, &nElements, sizeof(size_t));
p += sizeof(size_t);
size_t sizeOfOneElement = sizeof(typename VectorType::value_type);
size_t sizeOfAllElements = v.size() * sizeOfOneElement;
memcpy(p, &v[0], sizeOfAllElements);
p += sizeOfAllElements;
}
typedef const char* ConstCharPtrType;
template <typename VectorType>
void std_vector_assignFromBuffer_and_move_ptr(VectorType & v, ConstCharPtrType & p, const char* bufEndPtr) {
assert(bufEndPtr > p);
size_t nBytesInBuffer = bufEndPtr - p;
assert(nBytesInBuffer >= sizeof(size_t));
size_t nElements;
memcpy(&nElements, p, sizeof(size_t));
p += sizeof(size_t);
// Check that nElements has a reasonable value.
size_t sizeOfOneElement = sizeof(typename VectorType::value_type);
size_t sizeOfAllElements = nElements * sizeOfOneElement;
assert(sizeOfAllElements + sizeof(size_t) <= nBytesInBuffer);
v.resize(nElements);
memcpy(&v[0], p, sizeOfAllElements);
p += sizeOfAllElements;
}
#endif
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