Re-committing http://codereview.chromium.org/8736001/ originally committed revision=112305

third_party/libphonenumber/cpp/src/regexp_adapter_icu.cc

Index: third_party/libphonenumber/cpp/src/regexp_adapter_icu.cc
===================================================================
--- third_party/libphonenumber/cpp/src/regexp_adapter_icu.cc	(revision 112797)
+++ third_party/libphonenumber/cpp/src/regexp_adapter_icu.cc	(working copy)
@@ -1,209 +0,0 @@
-// 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: George Yakovlev
-//         Philippe Liard
-
-#include "regexp_adapter.h"
-
-#include <string>
-
-#include <unicode/regex.h>
-#include <unicode/unistr.h>
-
-#include "base/basictypes.h"
-#include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
-#include "default_logger.h"
-
-namespace i18n {
-namespace phonenumbers {
-
-using icu::RegexMatcher;
-using icu::RegexPattern;
-using icu::UnicodeString;
-
-namespace {
-
-// Converts UnicodeString 'source' to a UTF8-formatted std::string.
-string UnicodeStringToUtf8String(const UnicodeString& source) {
-  string data;
-  source.toUTF8String<string>(data);
-  return data;
-}
-
-}  // namespace
-
-// Implementation of the abstract classes RegExpInput and RegExp using ICU
-// regular expression capabilities.
-
-// ICU implementation of the RegExpInput abstract class.
-class IcuRegExpInput : public RegExpInput {
- public:
-  explicit IcuRegExpInput(const string& utf8_input)
-      : utf8_input_(UnicodeString::fromUTF8(utf8_input)),
-        position_(0) {}
-
-  virtual ~IcuRegExpInput() {}
-
-  virtual string ToString() const {
-    return UnicodeStringToUtf8String(utf8_input_.tempSubString(position_));
-  }
-
-  UnicodeString* Data() {
-    return &utf8_input_;
-  }
-
-  // The current start position. For a newly created input, position is 0. Each
-  // call to ConsumeRegExp() or RegExp::Consume() advances the position in the
-  // case of the successful match to be after the match.
-  int position() const {
-    return position_;
-  }
-
-  void set_position(int position) {
-    DCHECK(position >= 0 && position <= utf8_input_.length());
-    position_ = position;
-  }
-
- private:
-  UnicodeString utf8_input_;
-  int position_;
-
-  DISALLOW_COPY_AND_ASSIGN(IcuRegExpInput);
-};
-
-// ICU implementation of the RegExp abstract class.
-class IcuRegExp : public RegExp {
- public:
-  explicit IcuRegExp(const string& utf8_regexp) {
-    UParseError parse_error;
-    UErrorCode status = U_ZERO_ERROR;
-    utf8_regexp_.reset(RegexPattern::compile(
-        UnicodeString::fromUTF8(utf8_regexp), 0, parse_error, status));
-    if (U_FAILURE(status)) {
-      // The provided regular expressions should compile correctly.
-      LOG(ERROR) << "Error compiling regular expression: " << utf8_regexp;
-      utf8_regexp_.reset(NULL);
-    }
-  }
-
-  virtual ~IcuRegExp() {}
-
-  virtual bool Consume(RegExpInput* input_string,
-                       bool anchor_at_start,
-                       string* matched_string1,
-                       string* matched_string2,
-                       string* matched_string3) const {
-    DCHECK(input_string);
-    if (!utf8_regexp_.get()) {
-      return false;
-    }
-    IcuRegExpInput* const input = static_cast<IcuRegExpInput*>(input_string);
-    UErrorCode status = U_ZERO_ERROR;
-    const scoped_ptr<RegexMatcher> matcher(
-        utf8_regexp_->matcher(*input->Data(), status));
-    bool match_succeeded = anchor_at_start
-        ? matcher->lookingAt(input->position(), status)
-        : matcher->find(input->position(), status);
-    if (!match_succeeded || U_FAILURE(status)) {
-      return false;
-    }
-    string* const matched_strings[] = {
-      matched_string1, matched_string2, matched_string3
-    };
-    // If less matches than expected - fail.
-    for (size_t i = 0; i < arraysize(matched_strings); ++i) {
-      if (matched_strings[i]) {
-        // Groups are counted from 1 rather than 0.
-        const int group_index = i + 1;
-        if (group_index > matcher->groupCount()) {
-          return false;
-        }
-        *matched_strings[i] =
-            UnicodeStringToUtf8String(matcher->group(group_index, status));
-      }
-    }
-    input->set_position(matcher->end(status));
-    return !U_FAILURE(status);
-  }
-
-  bool Match(const string& input_string,
-             bool full_match,
-             string* matched_string) const {
-    if (!utf8_regexp_.get()) {
-      return false;
-    }
-    IcuRegExpInput input(input_string);
-    UErrorCode status = U_ZERO_ERROR;
-    const scoped_ptr<RegexMatcher> matcher(
-        utf8_regexp_->matcher(*input.Data(), status));
-    bool match_succeeded = full_match
-        ? matcher->matches(input.position(), status)
-        : matcher->find(input.position(), status);
-    if (!match_succeeded || U_FAILURE(status)) {
-      return false;
-    }
-    if (matcher->groupCount() > 0 && matched_string) {
-      *matched_string = UnicodeStringToUtf8String(matcher->group(1, status));
-    }
-    return !U_FAILURE(status);
-  }
-
-  bool Replace(string* string_to_process,
-               bool global,
-               const string& replacement_string) const {
-    DCHECK(string_to_process);
-    if (!utf8_regexp_.get()) {
-      return false;
-    }
-    IcuRegExpInput input(*string_to_process);
-    UErrorCode status = U_ZERO_ERROR;
-    const scoped_ptr<RegexMatcher> matcher(
-        utf8_regexp_->matcher(*input.Data(), status));
-    if (U_FAILURE(status)) {
-      return false;
-    }
-    UnicodeString result = global
-        ? matcher->replaceAll(
-            UnicodeString::fromUTF8(replacement_string), status)
-        : matcher->replaceFirst(
-            UnicodeString::fromUTF8(replacement_string), status);
-    if (U_FAILURE(status)) {
-      return false;
-    }
-    const string replaced_string = UnicodeStringToUtf8String(result);
-    if (replaced_string == *string_to_process) {
-      return false;
-    }
-    *string_to_process = replaced_string;
-    return true;
-  }
-
- private:
-  scoped_ptr<RegexPattern> utf8_regexp_;
-
-  DISALLOW_COPY_AND_ASSIGN(IcuRegExp);
-};
-
-RegExpInput* RegExpInput::Create(const string& utf8_input) {
-  return new IcuRegExpInput(utf8_input);
-}
-
-RegExp* RegExp::Create(const string& utf8_regexp) {
-  return new IcuRegExp(utf8_regexp);
-}
-
-}  // namespace phonenumbers
-}  // namespace i18n