1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/toolkit/crashreporter/google-breakpad/src/common/unique_string.cc Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,110 @@
1.4 +// Copyright (c) 2013 Google Inc.
1.5 +// All rights reserved.
1.6 +//
1.7 +// Redistribution and use in source and binary forms, with or without
1.8 +// modification, are permitted provided that the following conditions are
1.9 +// met:
1.10 +//
1.11 +// * Redistributions of source code must retain the above copyright
1.12 +// notice, this list of conditions and the following disclaimer.
1.13 +// * Redistributions in binary form must reproduce the above
1.14 +// copyright notice, this list of conditions and the following disclaimer
1.15 +// in the documentation and/or other materials provided with the
1.16 +// distribution.
1.17 +// * Neither the name of Google Inc. nor the names of its
1.18 +// contributors may be used to endorse or promote products derived from
1.19 +// this software without specific prior written permission.
1.20 +//
1.21 +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.22 +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
1.23 +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
1.24 +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
1.25 +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
1.26 +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
1.27 +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
1.28 +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
1.29 +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
1.30 +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
1.31 +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.32 +
1.33 +#include <string>
1.34 +#include <map>
1.35 +
1.36 +#include <stdlib.h>
1.37 +#include <string.h>
1.38 +
1.39 +#include "common/unique_string.h"
1.40 +
1.41 +namespace google_breakpad {
1.42 +
1.43 +///////////////////////////////////////////////////////////////////
1.44 +// UniqueString
1.45 +//
1.46 +class UniqueString {
1.47 + public:
1.48 + UniqueString(string str) { str_ = strdup(str.c_str()); }
1.49 + ~UniqueString() { free(reinterpret_cast<void*>(const_cast<char*>(str_))); }
1.50 + const char* str_;
1.51 +};
1.52 +
1.53 +class UniqueStringUniverse {
1.54 + public:
1.55 + UniqueStringUniverse() {};
1.56 + const UniqueString* FindOrCopy(string str) {
1.57 + std::map<string, UniqueString*>::iterator it = map_.find(str);
1.58 + if (it == map_.end()) {
1.59 + UniqueString* ustr = new UniqueString(str);
1.60 + map_[str] = ustr;
1.61 + return ustr;
1.62 + } else {
1.63 + return it->second;
1.64 + }
1.65 + }
1.66 + private:
1.67 + std::map<string, UniqueString*> map_;
1.68 +};
1.69 +
1.70 +//
1.71 +///////////////////////////////////////////////////////////////////
1.72 +
1.73 +
1.74 +static UniqueStringUniverse* sUSU = NULL;
1.75 +
1.76 +
1.77 +// This isn't threadsafe.
1.78 +const UniqueString* ToUniqueString(string str) {
1.79 + if (!sUSU) {
1.80 + sUSU = new UniqueStringUniverse();
1.81 + }
1.82 + return sUSU->FindOrCopy(str);
1.83 +}
1.84 +
1.85 +// This isn't threadsafe.
1.86 +const UniqueString* ToUniqueString_n(const char* str, size_t n) {
1.87 + if (!sUSU) {
1.88 + sUSU = new UniqueStringUniverse();
1.89 + }
1.90 + string key(str, n);
1.91 + return sUSU->FindOrCopy(key);
1.92 +}
1.93 +
1.94 +const char Index(const UniqueString* us, int ix)
1.95 +{
1.96 + return us->str_[ix];
1.97 +}
1.98 +
1.99 +const char* const FromUniqueString(const UniqueString* ustr)
1.100 +{
1.101 + return ustr->str_;
1.102 +}
1.103 +
1.104 +int StrcmpUniqueString(const UniqueString* us1, const UniqueString* us2) {
1.105 + return strcmp(us1->str_, us2->str_);
1.106 +}
1.107 +
1.108 +bool LessThan_UniqueString(const UniqueString* us1, const UniqueString* us2) {
1.109 + int r = StrcmpUniqueString(us1, us2);
1.110 + return r < 0;
1.111 +}
1.112 +
1.113 +} // namespace google_breakpad
