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backport: init-by-zero option: resize with same size must be a NOP

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This commit is contained in:
Benoit Jacob 2009-11-16 13:47:02 -05:00
parent 6aad7f80ff
commit 153557527e
1 changed files with 15 additions and 3 deletions
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18
Eigen/src/Core/Matrix.h
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@ -238,8 +238,14 @@ class Matrix
&& (RowsAtCompileTime == Dynamic || RowsAtCompileTime == rows)
&& (MaxColsAtCompileTime == Dynamic || MaxColsAtCompileTime >= cols)
&& (ColsAtCompileTime == Dynamic || ColsAtCompileTime == cols));
m_storage.resize(rows * cols, rows, cols);
EIGEN_INITIALIZE_BY_ZERO_IF_THAT_OPTION_IS_ENABLED
#ifdef EIGEN_INITIALIZE_MATRICES_BY_ZERO
int size = rows*cols;
bool size_changed = size != this->size();
m_storage.resize(size, rows, cols);
if(size_changed) EIGEN_INITIALIZE_BY_ZERO_IF_THAT_OPTION_IS_ENABLED
#else
m_storage.resize(rows*cols, rows, cols);
#endif
}
/** Resizes \c *this to a vector of length \a size
@ -249,11 +255,17 @@ class Matrix
inline void resize(int size)
{
EIGEN_STATIC_ASSERT_VECTOR_ONLY(Matrix)
ei_assert(SizeAtCompileTime == Dynamic || SizeAtCompileTime == size);
#ifdef EIGEN_INITIALIZE_MATRICES_BY_ZERO
bool size_changed = size != this->size();
#endif
if(RowsAtCompileTime == 1)
m_storage.resize(size, 1, size);
else
m_storage.resize(size, size, 1);
EIGEN_INITIALIZE_BY_ZERO_IF_THAT_OPTION_IS_ENABLED
#ifdef EIGEN_INITIALIZE_MATRICES_BY_ZERO
if(size_changed) EIGEN_INITIALIZE_BY_ZERO_IF_THAT_OPTION_IS_ENABLED
#endif
}
/** Copies the value of the expression \a other into \c *this with automatic resizing.