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 (at) 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 40 namespace google { 41 namespace protobuf { 42 namespace internal { 43 44 double Infinity() { 45 return std::numeric_limits<double>::infinity(); 46 } 47 double NaN() { 48 return std::numeric_limits<double>::quiet_NaN(); 49 } 50 51 const ::std::string* empty_string_; 52 GOOGLE_PROTOBUF_DECLARE_ONCE(empty_string_once_init_); 53 54 void DeleteEmptyString() { 55 delete empty_string_; 56 } 57 58 void InitEmptyString() { 59 empty_string_ = new string; 60 OnShutdown(&DeleteEmptyString); 61 } 62 63 int 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
