54c72aaccc
I've been meaning to do this for a while, and it came up on the bug below that there have been conflicts with similar-named files in <base/*.h>, so let's rule out one possible explanation. Bug: http://b/27804373 Change-Id: I69e5d52b6260c573c308513420aee0e281426bd4
73 lines
2.2 KiB
C++
73 lines
2.2 KiB
C++
/*
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* Copyright (C) 2015 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_PARSEINT_H
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#define ANDROID_BASE_PARSEINT_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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// Parses the unsigned decimal integer in the string 's' and sets 'out' to
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// that value. Optionally allows the caller to define a 'max' beyond which
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// otherwise valid values will be rejected. Returns boolean success.
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template <typename T>
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bool ParseUint(const char* s, T* out,
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T max = std::numeric_limits<T>::max()) {
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int base = (s[0] == '0' && s[1] == 'x') ? 16 : 10;
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errno = 0;
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char* end;
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unsigned long long int result = strtoull(s, &end, base);
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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 (max < result) {
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return false;
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}
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*out = static_cast<T>(result);
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return true;
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}
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// Parses the signed decimal integer in the string 's' and sets 'out' to
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// that value. Optionally allows the caller to define a 'min' and 'max
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// beyond which otherwise valid values will be rejected. Returns boolean
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// success.
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template <typename T>
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bool ParseInt(const char* s, T* out,
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T min = std::numeric_limits<T>::min(),
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T max = std::numeric_limits<T>::max()) {
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int base = (s[0] == '0' && s[1] == 'x') ? 16 : 10;
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errno = 0;
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char* end;
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long long int result = strtoll(s, &end, base);
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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 = static_cast<T>(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_PARSEINT_H
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