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1 // Protocol Buffers - Google's data interchange format | 1 // Protocol Buffers - Google's data interchange format |
2 // Copyright 2008 Google Inc. All rights reserved. | 2 // Copyright 2008 Google Inc. All rights reserved. |
3 // https://developers.google.com/protocol-buffers/ | 3 // https://developers.google.com/protocol-buffers/ |
4 // | 4 // |
5 // Redistribution and use in source and binary forms, with or without | 5 // Redistribution and use in source and binary forms, with or without |
6 // modification, are permitted provided that the following conditions are | 6 // modification, are permitted provided that the following conditions are |
7 // met: | 7 // met: |
8 // | 8 // |
9 // * Redistributions of source code must retain the above copyright | 9 // * Redistributions of source code must retain the above copyright |
10 // notice, this list of conditions and the following disclaimer. | 10 // notice, this list of conditions and the following disclaimer. |
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41 namespace protobuf { | 41 namespace protobuf { |
42 namespace internal { | 42 namespace internal { |
43 | 43 |
44 double Infinity() { | 44 double Infinity() { |
45 return std::numeric_limits<double>::infinity(); | 45 return std::numeric_limits<double>::infinity(); |
46 } | 46 } |
47 double NaN() { | 47 double NaN() { |
48 return std::numeric_limits<double>::quiet_NaN(); | 48 return std::numeric_limits<double>::quiet_NaN(); |
49 } | 49 } |
50 | 50 |
51 const ::std::string* empty_string_; | |
52 GOOGLE_PROTOBUF_DECLARE_ONCE(empty_string_once_init_); | |
53 | |
54 void DeleteEmptyString() { | 51 void DeleteEmptyString() { |
55 delete empty_string_; | 52 delete cr_empty_string_; |
56 } | 53 } |
57 | 54 |
58 void InitEmptyString() { | 55 void InitEmptyString() { |
59 empty_string_ = new string; | 56 cr_empty_string_ = new string; |
60 OnShutdown(&DeleteEmptyString); | 57 OnShutdown(&DeleteEmptyString); |
61 } | 58 } |
62 | 59 |
63 const ::std::string& GetEmptyString() { | 60 const ::std::string& GetEmptyString() { |
64 ::google::protobuf::GoogleOnceInit(&empty_string_once_init_, &InitEmptyString)
; | 61 ::google::protobuf::GoogleOnceInit(&cr_empty_string_once_init_, |
| 62 &InitEmptyString); |
65 return GetEmptyStringAlreadyInited(); | 63 return GetEmptyStringAlreadyInited(); |
66 } | 64 } |
67 | 65 |
68 | 66 |
69 int StringSpaceUsedExcludingSelf(const string& str) { | 67 int StringSpaceUsedExcludingSelf(const string& str) { |
70 const void* start = &str; | 68 const void* start = &str; |
71 const void* end = &str + 1; | 69 const void* end = &str + 1; |
72 if (start <= str.data() && str.data() < end) { | 70 if (start <= str.data() && str.data() < end) { |
73 // The string's data is stored inside the string object itself. | 71 // The string's data is stored inside the string object itself. |
74 return 0; | 72 return 0; |
75 } else { | 73 } else { |
76 return str.capacity(); | 74 return str.capacity(); |
77 } | 75 } |
78 } | 76 } |
79 | 77 |
80 | 78 |
81 | 79 |
82 } // namespace internal | 80 } // namespace internal |
83 } // namespace protobuf | 81 } // namespace protobuf |
84 } // namespace google | 82 } // namespace google |
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