toolkit/crashreporter/google-breakpad/src/common/unique_string.cc@6474c204b198 (annotated)
toolkit/crashreporter/google-breakpad/src/common/unique_string.cc
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // Copyright (c) 2013 Google Inc. |
| michael@0 | 2 | // All rights reserved. |
| michael@0 | 3 | // |
| michael@0 | 4 | // Redistribution and use in source and binary forms, with or without |
| michael@0 | 5 | // modification, are permitted provided that the following conditions are |
| michael@0 | 6 | // met: |
| michael@0 | 7 | // |
| michael@0 | 8 | // * Redistributions of source code must retain the above copyright |
| michael@0 | 9 | // notice, this list of conditions and the following disclaimer. |
| michael@0 | 10 | // * Redistributions in binary form must reproduce the above |
| michael@0 | 11 | // copyright notice, this list of conditions and the following disclaimer |
| michael@0 | 12 | // in the documentation and/or other materials provided with the |
| michael@0 | 13 | // distribution. |
| michael@0 | 14 | // * Neither the name of Google Inc. nor the names of its |
| michael@0 | 15 | // contributors may be used to endorse or promote products derived from |
| michael@0 | 16 | // this software without specific prior written permission. |
| michael@0 | 17 | // |
| michael@0 | 18 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| michael@0 | 19 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| michael@0 | 20 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| michael@0 | 21 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| michael@0 | 22 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| michael@0 | 23 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| michael@0 | 24 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| michael@0 | 25 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| michael@0 | 26 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| michael@0 | 27 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| michael@0 | 28 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| michael@0 | 29 | |
| michael@0 | 30 | #include <string> |
| michael@0 | 31 | #include <map> |
| michael@0 | 32 | |
| michael@0 | 33 | #include <stdlib.h> |
| michael@0 | 34 | #include <string.h> |
| michael@0 | 35 | |
| michael@0 | 36 | #include "common/unique_string.h" |
| michael@0 | 37 | |
| michael@0 | 38 | namespace google_breakpad { |
| michael@0 | 39 | |
| michael@0 | 40 | /////////////////////////////////////////////////////////////////// |
| michael@0 | 41 | // UniqueString |
| michael@0 | 42 | // |
| michael@0 | 43 | class UniqueString { |
| michael@0 | 44 | public: |
| michael@0 | 45 | UniqueString(string str) { str_ = strdup(str.c_str()); } |
| michael@0 | 46 | ~UniqueString() { free(reinterpret_cast<void*>(const_cast<char*>(str_))); } |
| michael@0 | 47 | const char* str_; |
| michael@0 | 48 | }; |
| michael@0 | 49 | |
| michael@0 | 50 | class UniqueStringUniverse { |
| michael@0 | 51 | public: |
| michael@0 | 52 | UniqueStringUniverse() {}; |
| michael@0 | 53 | const UniqueString* FindOrCopy(string str) { |
| michael@0 | 54 | std::map<string, UniqueString*>::iterator it = map_.find(str); |
| michael@0 | 55 | if (it == map_.end()) { |
| michael@0 | 56 | UniqueString* ustr = new UniqueString(str); |
| michael@0 | 57 | map_[str] = ustr; |
| michael@0 | 58 | return ustr; |
| michael@0 | 59 | } else { |
| michael@0 | 60 | return it->second; |
| michael@0 | 61 | } |
| michael@0 | 62 | } |
| michael@0 | 63 | private: |
| michael@0 | 64 | std::map<string, UniqueString*> map_; |
| michael@0 | 65 | }; |
| michael@0 | 66 | |
| michael@0 | 67 | // |
| michael@0 | 68 | /////////////////////////////////////////////////////////////////// |
| michael@0 | 69 | |
| michael@0 | 70 | |
| michael@0 | 71 | static UniqueStringUniverse* sUSU = NULL; |
| michael@0 | 72 | |
| michael@0 | 73 | |
| michael@0 | 74 | // This isn't threadsafe. |
| michael@0 | 75 | const UniqueString* ToUniqueString(string str) { |
| michael@0 | 76 | if (!sUSU) { |
| michael@0 | 77 | sUSU = new UniqueStringUniverse(); |
| michael@0 | 78 | } |
| michael@0 | 79 | return sUSU->FindOrCopy(str); |
| michael@0 | 80 | } |
| michael@0 | 81 | |
| michael@0 | 82 | // This isn't threadsafe. |
| michael@0 | 83 | const UniqueString* ToUniqueString_n(const char* str, size_t n) { |
| michael@0 | 84 | if (!sUSU) { |
| michael@0 | 85 | sUSU = new UniqueStringUniverse(); |
| michael@0 | 86 | } |
| michael@0 | 87 | string key(str, n); |
| michael@0 | 88 | return sUSU->FindOrCopy(key); |
| michael@0 | 89 | } |
| michael@0 | 90 | |
| michael@0 | 91 | const char Index(const UniqueString* us, int ix) |
| michael@0 | 92 | { |
| michael@0 | 93 | return us->str_[ix]; |
| michael@0 | 94 | } |
| michael@0 | 95 | |
| michael@0 | 96 | const char* const FromUniqueString(const UniqueString* ustr) |
| michael@0 | 97 | { |
| michael@0 | 98 | return ustr->str_; |
| michael@0 | 99 | } |
| michael@0 | 100 | |
| michael@0 | 101 | int StrcmpUniqueString(const UniqueString* us1, const UniqueString* us2) { |
| michael@0 | 102 | return strcmp(us1->str_, us2->str_); |
| michael@0 | 103 | } |
| michael@0 | 104 | |
| michael@0 | 105 | bool LessThan_UniqueString(const UniqueString* us1, const UniqueString* us2) { |
| michael@0 | 106 | int r = StrcmpUniqueString(us1, us2); |
| michael@0 | 107 | return r < 0; |
| michael@0 | 108 | } |
| michael@0 | 109 | |
| michael@0 | 110 | } // namespace google_breakpad |
