Sylvestre Ledru
e7af966802
replaced by .editorconfig # ignore-this-changeset Differential Revision: https://phabricator.services.mozilla.com/D287855
30 lines
836 B
C++
30 lines
836 B
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* Provides checked integers operations, detecting overflow. */
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#ifndef mozilla_CheckedArithmetic_h
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#define mozilla_CheckedArithmetic_h
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namespace mozilla {
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template <typename T>
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[[nodiscard]] constexpr bool SafeAdd(T lhs, T rhs, T* res) {
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return !__builtin_add_overflow(lhs, rhs, res);
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}
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template <typename T>
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[[nodiscard]] constexpr bool SafeSub(T lhs, T rhs, T* res) {
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return !__builtin_sub_overflow(lhs, rhs, res);
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}
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template <typename T>
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[[nodiscard]] constexpr bool SafeMul(T lhs, T rhs, T* res) {
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return !__builtin_mul_overflow(lhs, rhs, res);
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}
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} // namespace mozilla
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#endif /* mozilla_CheckedArithmetic_h */
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