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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_; | 51 ExplicitlyConstructed< ::std::string> fixed_address_empty_string; |
52 GOOGLE_PROTOBUF_DECLARE_ONCE(empty_string_once_init_); | 52 GOOGLE_PROTOBUF_DECLARE_ONCE(empty_string_once_init_); |
53 | 53 |
54 void DeleteEmptyString() { | 54 void DeleteEmptyString() { fixed_address_empty_string.Shutdown(); } |
55 delete empty_string_; | |
56 } | |
57 | 55 |
58 void InitEmptyString() { | 56 void InitEmptyString() { |
59 empty_string_ = new string; | 57 fixed_address_empty_string.DefaultConstruct(); |
60 OnShutdown(&DeleteEmptyString); | 58 OnShutdown(&DeleteEmptyString); |
61 } | 59 } |
62 | 60 |
63 const ::std::string& GetEmptyString() { | 61 const ::std::string& GetEmptyString() { |
64 ::google::protobuf::GoogleOnceInit(&empty_string_once_init_, &InitEmptyString)
; | 62 ::google::protobuf::GoogleOnceInit(&empty_string_once_init_, &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 |
| 80 void InitProtobufDefaults() { |
| 81 GetEmptyString(); |
| 82 } |
| 83 |
82 } // namespace internal | 84 } // namespace internal |
83 } // namespace protobuf | 85 } // namespace protobuf |
84 } // namespace google | 86 } // namespace google |
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