Move webrtc/{base => rtc_base}

webrtc/base/string_to_number.cc

-/*
- *  Copyright 2017 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include <cerrno>
-#include <cstdlib>
-
-#include "webrtc/base/string_to_number.h"
-
-namespace rtc {
-namespace string_to_number_internal {
-
-rtc::Optional<signed_type> ParseSigned(const char* str, int base) {
-  RTC_DCHECK(str);
-  if (isdigit(str[0]) || str[0] == '-') {
-    char* end = nullptr;
-    errno = 0;
-    const signed_type value = std::strtoll(str, &end, base);
-    if (end && *end == '\0' && errno == 0) {
-      return rtc::Optional<signed_type>(value);
-    }
-  }
-  return rtc::Optional<signed_type>();
-}
-
-rtc::Optional<unsigned_type> ParseUnsigned(const char* str, int base) {
-  RTC_DCHECK(str);
-  if (isdigit(str[0]) || str[0] == '-') {
-    // Explicitly discard negative values. std::strtoull parsing causes unsigned
-    // wraparound. We cannot just reject values that start with -, though, since
-    // -0 is perfectly fine, as is -0000000000000000000000000000000.
-    const bool is_negative = str[0] == '-';
-    char* end = nullptr;
-    errno = 0;
-    const unsigned_type value = std::strtoull(str, &end, base);
-    if (end && *end == '\0' && errno == 0 && (value == 0 || !is_negative)) {
-      return rtc::Optional<unsigned_type>(value);
-    }
-  }
-  return rtc::Optional<unsigned_type>();
-}
-
-}  // namespace string_to_number_internal
-}  // namespace rtc