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
40 namespace google {
41 namespace protobuf {
42 namespace internal {
43
Infinity()44 double Infinity() {
45 return std::numeric_limits<double>::infinity();
46 }
NaN()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
DeleteEmptyString()54 void DeleteEmptyString() {
55 delete empty_string_;
56 }
57
InitEmptyString()58 void InitEmptyString() {
59 empty_string_ = new string;
60 OnShutdown(&DeleteEmptyString);
61 }
62
StringSpaceUsedExcludingSelf(const string & str)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