LCOV - code coverage report
Current view: top level - lunchbox - buffer.ipp (source / functions) Hit Total Coverage
Test: Lunchbox Lines: 4 22 18.2 %
Date: 2018-10-03 05:33:11 Functions: 1 4 25.0 %

          Line data    Source code
       1             : 
       2             : /* Copyright (c) 2007-2016, Stefan Eilemann <eile@equalizergraphics.com>
       3             :  *                          Daniel Nachbaur <danielnachbaur@gmail.com>
       4             :  *
       5             :  * This library is free software; you can redistribute it and/or modify it under
       6             :  * the terms of the GNU Lesser General Public License version 2.1 as published
       7             :  * by the Free Software Foundation.
       8             :  *
       9             :  * This library is distributed in the hope that it will be useful, but WITHOUT
      10             :  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
      11             :  * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
      12             :  * details.
      13             :  *
      14             :  * You should have received a copy of the GNU Lesser General Public License
      15             :  * along with this library; if not, write to the Free Software Foundation, Inc.,
      16             :  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
      17             :  */
      18             : 
      19             : namespace lunchbox
      20             : {
      21             : template <class T>
      22           1 : Buffer<T>::Buffer(const Buffer<T>& from)
      23             :     : _data(nullptr)
      24             :     , _size(0)
      25           1 :     , _maxSize(0)
      26             : {
      27           1 :     if (!from.isEmpty())
      28           0 :         *this = from;
      29           1 : }
      30             : 
      31             : template <class T>
      32             : Buffer<T>::Buffer(Buffer<T>&& from)
      33             :     : _data(std::move(from._data))
      34             :     , _size(from._size)
      35             :     , _maxSize(from._maxSize)
      36             : {
      37             :     from._data = nullptr;
      38             :     from._size = 0;
      39             :     from._maxSize = 0;
      40             : }
      41             : 
      42             : template <class T>
      43             : T* Buffer<T>::pack()
      44             : {
      45             :     if (_maxSize != _size)
      46             :     {
      47             :         _data = static_cast<T*>(realloc(_data, _size * sizeof(T)));
      48             :         _maxSize = _size;
      49             :     }
      50             :     return _data;
      51             : }
      52             : 
      53             : template <class T>
      54           0 : Buffer<T>& Buffer<T>::operator=(const Buffer<T>& from)
      55             : {
      56           0 :     if (this != &from)
      57           0 :         replace(from);
      58           0 :     return *this;
      59             : }
      60             : 
      61             : template <class T>
      62             : Buffer<T>& Buffer<T>::operator=(Buffer<T>&& from)
      63             : {
      64             :     if (this == &from)
      65             :         return *this;
      66             :     std::swap(_data, from._data);
      67             :     std::swap(_size, from._size);
      68             :     std::swap(_maxSize, from._maxSize);
      69             :     return *this;
      70             : }
      71             : 
      72             : template <class T>
      73             : T* Buffer<T>::resize(const uint64_t newSize)
      74             : {
      75             :     _size = newSize;
      76             :     if (newSize <= _maxSize)
      77             :         return _data;
      78             : 
      79             :     // avoid excessive reallocs
      80             :     const uint64_t nElems = newSize + (newSize >> 3);
      81             :     const uint64_t nBytes = nElems * sizeof(T);
      82             :     _data = static_cast<T*>(realloc(_data, nBytes));
      83             :     _maxSize = nElems;
      84             :     return _data;
      85             : }
      86             : 
      87             : template <class T>
      88             : void Buffer<T>::grow(const uint64_t newSize)
      89             : {
      90             :     if (newSize > _size)
      91             :         resize(newSize);
      92             : }
      93             : 
      94             : template <class T>
      95           0 : T* Buffer<T>::reserve(const uint64_t newSize)
      96             : {
      97           0 :     if (newSize <= _maxSize)
      98           0 :         return _data;
      99             : 
     100           0 :     _data = static_cast<T*>(realloc(_data, newSize * sizeof(T)));
     101           0 :     _maxSize = newSize;
     102           0 :     return _data;
     103             : }
     104             : 
     105             : template <class T>
     106             : T* Buffer<T>::reset(const uint64_t newSize)
     107             : {
     108             :     reserve(newSize);
     109             :     setSize(newSize);
     110             :     return _data;
     111             : }
     112             : 
     113             : template <class T>
     114             : void Buffer<T>::append(const T* data, const uint64_t size)
     115             : {
     116             :     LBASSERT(data);
     117             :     LBASSERT(size);
     118             : 
     119             :     const uint64_t oldSize = _size;
     120             :     resize(oldSize + size);
     121             :     memcpy(_data + oldSize, data, size * sizeof(T));
     122             : }
     123             : 
     124             : template <class T>
     125             : void Buffer<T>::append(const T& element)
     126             : {
     127             :     append(&element, 1);
     128             : }
     129             : 
     130             : template <class T>
     131           0 : void Buffer<T>::replace(const void* data, const uint64_t size)
     132             : {
     133           0 :     LBASSERT(data);
     134           0 :     LBASSERT(size);
     135             : 
     136           0 :     reserve(size);
     137           0 :     memcpy(_data, data, size * sizeof(T));
     138           0 :     _size = size;
     139           0 : }
     140             : 
     141             : template <class T>
     142             : void Buffer<T>::swap(Buffer<T>& buffer)
     143             : {
     144             :     T* tmpData = buffer._data;
     145             :     const uint64_t tmpSize = buffer._size;
     146             :     const uint64_t tmpMaxSize = buffer._maxSize;
     147             : 
     148             :     buffer._data = _data;
     149             :     buffer._size = _size;
     150             :     buffer._maxSize = _maxSize;
     151             : 
     152             :     _data = tmpData;
     153             :     _size = tmpSize;
     154             :     _maxSize = tmpMaxSize;
     155             : }
     156             : 
     157             : template <class T>
     158             : bool Buffer<T>::setSize(const uint64_t size)
     159             : {
     160             :     LBASSERT(size <= _maxSize);
     161             :     if (size > _maxSize)
     162             :         return false;
     163             : 
     164             :     _size = size;
     165             :     return true;
     166             : }
     167             : }

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