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Fix overlaping operands when calling memcpy

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Gael Guennebaud 2013-03-04 17:47:45 +01:00
parent d2e5c9d892
commit 24d81aeb20
1 changed files with 2 additions and 13 deletions
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15
Eigen/src/SparseCore/SparseBlock.h
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@ -156,19 +156,8 @@ public:
// no need to realloc, simply copy the tail at its respective position and insert tmp // no need to realloc, simply copy the tail at its respective position and insert tmp
matrix.data().resize(nnz_head + nnz + nnz_tail); matrix.data().resize(nnz_head + nnz + nnz_tail);
if(nnz<nnz_previous) std::memmove(&matrix.data().value(nnz_head+nnz), &matrix.data().value(tail), nnz_tail*sizeof(Scalar));
{ std::memmove(&matrix.data().index(nnz_head+nnz), &matrix.data().index(tail), nnz_tail*sizeof(Index));
std::memcpy(&matrix.data().value(nnz_head+nnz), &matrix.data().value(tail), nnz_tail*sizeof(Scalar));
std::memcpy(&matrix.data().index(nnz_head+nnz), &matrix.data().index(tail), nnz_tail*sizeof(Index));
}
else
{
for(Index i=nnz_tail-1; i>=0; --i)
{
matrix.data().value(nnz_head+nnz+i) = matrix.data().value(tail+i);
matrix.data().index(nnz_head+nnz+i) = matrix.data().index(tail+i);
}
}
std::memcpy(&matrix.data().value(nnz_head), &tmp.data().value(0), nnz*sizeof(Scalar)); std::memcpy(&matrix.data().value(nnz_head), &tmp.data().value(0), nnz*sizeof(Scalar));
std::memcpy(&matrix.data().index(nnz_head), &tmp.data().index(0), nnz*sizeof(Index)); std::memcpy(&matrix.data().index(nnz_head), &tmp.data().index(0), nnz*sizeof(Index));