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ec38bf152d
Otherwise, when assigning to a smaller type, MSVC warns e.g.
d:\src\crashpad\crashpad\util\numeric\safe_assignment.h(38) : error C2220: warning treated as error - no 'object' file generated
d:\src\crashpad\crashpad\util\file\string_file_writer.cc(127) : see reference to function template instantiation 'bool crashpad::AssignIfInRange<size_t,FileOffset>(Destination *,Source)' being compiled
with
[
Destination=size_t
, Source=FileOffset
]
d:\src\crashpad\crashpad\util\numeric\safe_assignment.h(38) : warning C4244: '=' : conversion from 'FileOffset' to 'size_t', possible loss of data
R=mark@chromium.org
BUG=crashpad:1
Review URL: https://codereview.chromium.org/809303003
45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
// Copyright 2014 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef CRASHPAD_UTIL_NUMERIC_SAFE_ASSIGNMENT_H_
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#define CRASHPAD_UTIL_NUMERIC_SAFE_ASSIGNMENT_H_
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#include "base/numerics/safe_conversions.h"
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namespace crashpad {
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//! \brief Performs an assignment if it can be done safely, and signals if it
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//! cannot be done safely.
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//!
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//! \param[out] destination A pointer to the variable to be assigned to.
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//! \param[in] source The value to assign.
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//!
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//! \return `true` if \a source is in the range supported by the type of \a
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//! *destination, with the assignment to \a *destination having been
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//! performed. `false` if the assignment cannot be completed safely because
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//! \a source is outside of this range.
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template <typename Destination, typename Source>
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bool AssignIfInRange(Destination* destination, Source source) {
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if (!base::IsValueInRangeForNumericType<Destination>(source)) {
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return false;
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}
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*destination = static_cast<Destination>(source);
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return true;
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}
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} // namespace crashpad
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#endif // CRASHPAD_UTIL_NUMERIC_SAFE_ASSIGNMENT_H_
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