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reject sizes that will overflow in SkSpan

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Change-Id: Ie1eac40fe678529410f3ae4ab0cc7460dedfa4c2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/408296
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
This commit is contained in:
Herb Derby 2021-05-13 13:56:53 -04:00 committed by Skia Commit-Bot
parent 6529990763
commit 82fdab48ab
1 changed files with 4 additions and 1 deletions
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5
include/core/SkSpan.h
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@ -26,7 +26,9 @@ template <typename T>
class SkSpan {
public:
constexpr SkSpan() : fPtr{nullptr}, fSize{0} {}
constexpr SkSpan(T* ptr, size_t size) : fPtr{ptr}, fSize{size} {}
constexpr SkSpan(T* ptr, size_t size) : fPtr{ptr}, fSize{size} {
SkASSERT(size < kMaxSize);
}
template <typename U, typename = typename std::enable_if<std::is_same<const U, T>::value>::type>
constexpr SkSpan(const SkSpan<U>& that) : fPtr(that.data()), fSize{that.size()} {}
constexpr SkSpan(const SkSpan& o) = default;
@ -65,6 +67,7 @@ public:
}
private:
static constexpr size_t kMaxSize = std::numeric_limits<size_t>::max() / sizeof(T);
T* fPtr;
size_t fSize;
};