devtools/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2026-04-10 11:34:33 +08:00
Code Issues Packages Projects Releases Wiki Activity

various work on the Sparse module:

Browse Source 
* added some glue to Eigen/Core (SparseBit, ei_eval, Matrix)
* add two new sparse matrix types:
   HashMatrix: based on std::map (for random writes)
   LinkedVectorMatrix: array of linked vectors
   (for outer coherent writes, e.g. to transpose a matrix)
* add a SparseSetter class to easily set/update any kind of matrices, e.g.:
   { SparseSetter<MatrixType,RandomAccessPattern> wrapper(mymatrix);
     for (...) wrapper->coeffRef(rand(),rand()) = rand(); }
* automatic shallow copy for RValue
* and a lot of mess !
plus:
* remove the remaining ArrayBit related stuff
* don't use alloca in product for very large memory allocation
This commit is contained in:
Gael Guennebaud
2008-06-26 23:22:26 +00:00
parent c5bd1703cb
commit e5d301dc96
17 changed files with 1226 additions and 169 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
Eigen/src/Sparse/SparseArray.h
View File

@@ -32,11 +32,11 @@ template<typename Scalar> class SparseArray
{
public:
SparseArray()
: m_values(0), m_indices(0), m_size(0), m_allocatedSize(0)
: m_values(0), m_indices(0), m_size(0), m_allocatedSize(0), m_isShared(0)
{}
SparseArray(int size)
: m_values(0), m_indices(0), m_size(0), m_allocatedSize(0)
: m_values(0), m_indices(0), m_size(0), m_allocatedSize(0), m_isShared(0)
{
resize(size);
}
@@ -51,6 +51,28 @@ template<typename Scalar> class SparseArray
resize(other.size());
memcpy(m_values, other.m_values, m_size * sizeof(Scalar));
memcpy(m_indices, other.m_indices, m_size * sizeof(int));
m_isShared = 0;
}
void shallowCopy(const SparseArray& other)
{
delete[] m_values;
delete[] m_indices;
m_values = other.m_values;
m_indices = other.m_indices;
m_size = other.m_size;
m_allocatedSize = other.m_allocatedSize;
m_isShared = false;
other.m_isShared = true;
}
~SparseArray()
{
if (!m_isShared)
{
delete[] m_values;
delete[] m_indices;
}
}
void reserve(int size)
@@ -117,7 +139,11 @@ template<typename Scalar> class SparseArray
Scalar* m_values;
int* m_indices;
int m_size;
int m_allocatedSize;
struct {
int m_allocatedSize:31;
mutable int m_isShared:1;
};
};
#endif // EIGEN_SPARSE_ARRAY_H