1// Protocol Buffers - Google's data interchange format 2// Copyright 2008 Google Inc. All rights reserved. 3// https://developers.google.com/protocol-buffers/ 4// 5// Redistribution and use in source and binary forms, with or without 6// modification, are permitted provided that the following conditions are 7// met: 8// 9// * Redistributions of source code must retain the above copyright 10// notice, this list of conditions and the following disclaimer. 11// * Redistributions in binary form must reproduce the above 12// copyright notice, this list of conditions and the following disclaimer 13// in the documentation and/or other materials provided with the 14// distribution. 15// * Neither the name of Google Inc. nor the names of its 16// contributors may be used to endorse or promote products derived from 17// this software without specific prior written permission. 18// 19// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31// Author: kenton@google.com (Kenton Varda) 32// Based on original Protocol Buffers design by 33// Sanjay Ghemawat, Jeff Dean, and others. 34 35#include <google/protobuf/generated_message_util.h> 36 37#include <limits> 38 39 40namespace google { 41namespace protobuf { 42namespace internal { 43 44double Infinity() { 45 return std::numeric_limits<double>::infinity(); 46} 47double NaN() { 48 return std::numeric_limits<double>::quiet_NaN(); 49} 50 51const ::std::string* empty_string_; 52GOOGLE_PROTOBUF_DECLARE_ONCE(empty_string_once_init_); 53 54void DeleteEmptyString() { 55 delete empty_string_; 56} 57 58void InitEmptyString() { 59 empty_string_ = new string; 60 OnShutdown(&DeleteEmptyString); 61} 62 63int StringSpaceUsedExcludingSelf(const string& str) { 64 const void* start = &str; 65 const void* end = &str + 1; 66 if (start <= str.data() && str.data() < end) { 67 // The string's data is stored inside the string object itself. 68 return 0; 69 } else { 70 return str.capacity(); 71 } 72} 73 74 75 76} // namespace internal 77} // namespace protobuf 78} // namespace google 79