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Eliminate possible -Wstringop-overflow warning in .setZero()

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Sergiu Deitsch 2025-10-04 00:03:03 +02:00
parent 1edf360e3c
commit 32b0f386bc
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1 changed files with 3 additions and 5 deletions
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8
Eigen/src/Core/Fill.h
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@ -115,17 +115,15 @@ struct eigen_zero_impl<Xpr, /*use_memset*/ false> {
template <typename Xpr> template <typename Xpr>
struct eigen_zero_impl<Xpr, /*use_memset*/ true> { struct eigen_zero_impl<Xpr, /*use_memset*/ true> {
using Scalar = typename Xpr::Scalar; using Scalar = typename Xpr::Scalar;
static constexpr size_t max_bytes = (std::numeric_limits<std::ptrdiff_t>::max)();
static EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void run(Xpr& dst) { static EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void run(Xpr& dst) {
const size_t num_bytes = dst.size() * sizeof(Scalar); const std::ptrdiff_t num_bytes = dst.size() * static_cast<std::ptrdiff_t>(sizeof(Scalar));
if (num_bytes == 0) return; if (num_bytes <= 0) return;
void* dst_ptr = static_cast<void*>(dst.data()); void* dst_ptr = static_cast<void*>(dst.data());
#ifndef EIGEN_NO_DEBUG #ifndef EIGEN_NO_DEBUG
if (num_bytes > max_bytes) throw_std_bad_alloc();
eigen_assert((dst_ptr != nullptr) && "null pointer dereference error!"); eigen_assert((dst_ptr != nullptr) && "null pointer dereference error!");
#endif #endif
EIGEN_USING_STD(memset); EIGEN_USING_STD(memset);
memset(dst_ptr, 0, num_bytes); memset(dst_ptr, 0, static_cast<std::size_t>(num_bytes));
} }
template <typename SrcXpr> template <typename SrcXpr>
static EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void run(Xpr& dst, const SrcXpr& src) { static EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void run(Xpr& dst, const SrcXpr& src) {