25 lines
637 B
C
25 lines
637 B
C
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#pragma once
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#include <c10/util/ArrayRef.h>
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#include <c10/util/DimVector.h>
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#include <algorithm>
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namespace c10 {
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// Computes the contiguous strides of a tensor, given its sizes.
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static inline DimVector contiguous_strides(const IntArrayRef sizes) {
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using Int = IntArrayRef::value_type;
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const Int dims = static_cast<Int>(sizes.size());
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// With this initialisation we get the case dim == 0 or 1 right
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DimVector strides(dims, 1);
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for (auto i = dims - 2; i >= 0; --i) {
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// Strides can't be 0 even if sizes are 0.
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strides[i] = strides[i + 1] * std::max(sizes[i + 1], Int{1});
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}
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return strides;
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}
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} // namespace c10
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