997cba4271
Bug: http://b/24905115 Test: run libbase_test --gtest_filter=parsedouble.smoke. Change-Id: I604424772f2082b420935e6647da03981c0b8929
50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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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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*/
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#ifndef ANDROID_BASE_PARSEDOUBLE_H
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#define ANDROID_BASE_PARSEDOUBLE_H
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#include <errno.h>
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#include <stdlib.h>
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#include <limits>
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namespace android {
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namespace base {
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// Parse double value in the string 's' and sets 'out' to that value.
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// Optionally allows the caller to define a 'min' and 'max' beyond which
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// otherwise valid values will be rejected. Returns boolean success.
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static inline bool ParseDouble(const char* s, double* out,
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double min = std::numeric_limits<double>::lowest(),
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double max = std::numeric_limits<double>::max()) {
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errno = 0;
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char* end;
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double result = strtod(s, &end);
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if (errno != 0 || s == end || *end != '\0') {
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return false;
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}
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if (result < min || max < result) {
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return false;
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}
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*out = result;
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return true;
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}
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} // namespace base
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} // namespace android
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#endif // ANDROID_BASE_PARSEDOUBLE_H
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