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50 lines
1.5 KiB
50 lines
1.5 KiB
/* |
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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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