Revert 84000 - Autofill phone number enhancements and integration of Phone Number Util Library: p...

third_party/libphonenumber/cpp/src/re2_cache.cc

-// Copyright (C) 2011 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Author: Fredrik Roubert <roubert@google.com>
-
-#include "re2_cache.h"
-
-#include <cstddef>
-#include <string>
-#include <utility>
-
-#include <re2/re2.h>
-
-#include "base/logging.h"
-#include "base/synchronization/lock.h"
-
-using std::string;
-
-// A basic text book string hash function implementation, this one taken from
-// The Practice of Programming (Kernighan and Pike 1999). It could be a good
-// idea in the future to evaluate how well it actually performs and possibly
-// switch to another hash function better suited to this particular use case.
-namespace __gnu_cxx {
-template<> struct hash<string> {
-  enum { MULTIPLIER = 31 };
-  size_t operator()(const string& key) const {
-    size_t h = 0;
-    for (const char* p = key.c_str(); *p != '\0'; ++p) {
-      h *= MULTIPLIER;
-      h += *p;
-    }
-    return h;
-  }
-};
-}  // namespace __gnu_cxx
-
-namespace i18n {
-namespace phonenumbers {
-
-RE2Cache::RE2Cache(size_t min_items) : cache_impl_(new CacheImpl(min_items)) {}
-RE2Cache::~RE2Cache() {
-  base::AutoLock l(lock_);
-  LOG(2) << "Cache entries upon destruction: " << cache_impl_->size();
-  for (CacheImpl::const_iterator
-       it = cache_impl_->begin(); it != cache_impl_->end(); ++it) {
-    delete it->second;
-  }
-}
-
-RE2Cache::ScopedAccess::ScopedAccess(RE2Cache* cache, const string& pattern) {
-  DCHECK(cache);
-  base::AutoLock l(cache->lock_);
-  CacheImpl* const cache_impl = cache->cache_impl_.get();
-  CacheImpl::const_iterator it = cache_impl->find(pattern);
-  if (it != cache_impl->end()) {
-    regexp_ = it->second;
-  } else {
-    regexp_ = new RE2(pattern);
-    cache_impl->insert(make_pair(pattern, regexp_));
-  }
-}
-
-}  // namespace phonenumbers
-}  // namespace i18n