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comparison: toolkit/crashreporter/google-breakpad/src/common/unique_string.cc
toolkit/crashreporter/google-breakpad/src/common/unique_string.cc
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:34c273c70e4f |
|---|---|
| 1 // Copyright (c) 2013 Google Inc. | |
| 2 // All rights reserved. | |
| 3 // | |
| 4 // Redistribution and use in source and binary forms, with or without | |
| 5 // modification, are permitted provided that the following conditions are | |
| 6 // met: | |
| 7 // | |
| 8 // * Redistributions of source code must retain the above copyright | |
| 9 // notice, this list of conditions and the following disclaimer. | |
| 10 // * Redistributions in binary form must reproduce the above | |
| 11 // copyright notice, this list of conditions and the following disclaimer | |
| 12 // in the documentation and/or other materials provided with the | |
| 13 // distribution. | |
| 14 // * Neither the name of Google Inc. nor the names of its | |
| 15 // contributors may be used to endorse or promote products derived from | |
| 16 // this software without specific prior written permission. | |
| 17 // | |
| 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 | |
| 30 #include <string> | |
| 31 #include <map> | |
| 32 | |
| 33 #include <stdlib.h> | |
| 34 #include <string.h> | |
| 35 | |
| 36 #include "common/unique_string.h" | |
| 37 | |
| 38 namespace google_breakpad { | |
| 39 | |
| 40 /////////////////////////////////////////////////////////////////// | |
| 41 // UniqueString | |
| 42 // | |
| 43 class UniqueString { | |
| 44 public: | |
| 45 UniqueString(string str) { str_ = strdup(str.c_str()); } | |
| 46 ~UniqueString() { free(reinterpret_cast<void*>(const_cast<char*>(str_))); } | |
| 47 const char* str_; | |
| 48 }; | |
| 49 | |
| 50 class UniqueStringUniverse { | |
| 51 public: | |
| 52 UniqueStringUniverse() {}; | |
| 53 const UniqueString* FindOrCopy(string str) { | |
| 54 std::map<string, UniqueString*>::iterator it = map_.find(str); | |
| 55 if (it == map_.end()) { | |
| 56 UniqueString* ustr = new UniqueString(str); | |
| 57 map_[str] = ustr; | |
| 58 return ustr; | |
| 59 } else { | |
| 60 return it->second; | |
| 61 } | |
| 62 } | |
| 63 private: | |
| 64 std::map<string, UniqueString*> map_; | |
| 65 }; | |
| 66 | |
| 67 // | |
| 68 /////////////////////////////////////////////////////////////////// | |
| 69 | |
| 70 | |
| 71 static UniqueStringUniverse* sUSU = NULL; | |
| 72 | |
| 73 | |
| 74 // This isn't threadsafe. | |
| 75 const UniqueString* ToUniqueString(string str) { | |
| 76 if (!sUSU) { | |
| 77 sUSU = new UniqueStringUniverse(); | |
| 78 } | |
| 79 return sUSU->FindOrCopy(str); | |
| 80 } | |
| 81 | |
| 82 // This isn't threadsafe. | |
| 83 const UniqueString* ToUniqueString_n(const char* str, size_t n) { | |
| 84 if (!sUSU) { | |
| 85 sUSU = new UniqueStringUniverse(); | |
| 86 } | |
| 87 string key(str, n); | |
| 88 return sUSU->FindOrCopy(key); | |
| 89 } | |
| 90 | |
| 91 const char Index(const UniqueString* us, int ix) | |
| 92 { | |
| 93 return us->str_[ix]; | |
| 94 } | |
| 95 | |
| 96 const char* const FromUniqueString(const UniqueString* ustr) | |
| 97 { | |
| 98 return ustr->str_; | |
| 99 } | |
| 100 | |
| 101 int StrcmpUniqueString(const UniqueString* us1, const UniqueString* us2) { | |
| 102 return strcmp(us1->str_, us2->str_); | |
| 103 } | |
| 104 | |
| 105 bool LessThan_UniqueString(const UniqueString* us1, const UniqueString* us2) { | |
| 106 int r = StrcmpUniqueString(us1, us2); | |
| 107 return r < 0; | |
| 108 } | |
| 109 | |
| 110 } // namespace google_breakpad |
