c03627683f
Reland the base->rtc_base without adding stub headers (will be done in follow-up CL). This preserves git blame history of all files. BUG=webrtc:7634 NOTRY=True TBR=kwiberg@webrtc.org Change-Id: Iea3bb6f3f67b8374c96337b63e8f5aa3e6181012 Reviewed-on: https://chromium-review.googlesource.com/554611 Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Cr-Commit-Position: refs/heads/master@{#18821}
51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
/*
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* Copyright 2017 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <cerrno>
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#include <cstdlib>
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#include "webrtc/base/string_to_number.h"
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namespace rtc {
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namespace string_to_number_internal {
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rtc::Optional<signed_type> ParseSigned(const char* str, int base) {
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RTC_DCHECK(str);
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if (isdigit(str[0]) || str[0] == '-') {
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char* end = nullptr;
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errno = 0;
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const signed_type value = std::strtoll(str, &end, base);
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if (end && *end == '\0' && errno == 0) {
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return rtc::Optional<signed_type>(value);
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}
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}
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return rtc::Optional<signed_type>();
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}
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rtc::Optional<unsigned_type> ParseUnsigned(const char* str, int base) {
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RTC_DCHECK(str);
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if (isdigit(str[0]) || str[0] == '-') {
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// Explicitly discard negative values. std::strtoull parsing causes unsigned
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// wraparound. We cannot just reject values that start with -, though, since
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// -0 is perfectly fine, as is -0000000000000000000000000000000.
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const bool is_negative = str[0] == '-';
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char* end = nullptr;
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errno = 0;
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const unsigned_type value = std::strtoull(str, &end, base);
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if (end && *end == '\0' && errno == 0 && (value == 0 || !is_negative)) {
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return rtc::Optional<unsigned_type>(value);
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}
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}
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return rtc::Optional<unsigned_type>();
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}
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} // namespace string_to_number_internal
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} // namespace rtc
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