pagespeed/kernel/util/re2.h

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */


#ifndef PAGESPEED_KERNEL_UTIL_RE2_H_
#define PAGESPEED_KERNEL_UTIL_RE2_H_

#include "pagespeed/kernel/base/string_util.h"

#include "third_party/re2/src/re2/re2.h"

using re2::RE2;

namespace re2 {
const RE2::CannedOptions posix_syntax = RE2::POSIX;
}  // namespace re2

typedef re2::StringPiece Re2StringPiece;
// Converts a Google StringPiece into an RE2 StringPiece.  These are of course
// the same basic thing but are declared in distinct namespaces and as far as
// C++ type-checking is concerned they are incompatible.
//
// TODO(jmarantz): In the re2 code itself there are no references to
// re2::StringPiece, always just plain StringPiece, so if we can
// arrange to get the right definition #included we should be all set.
// We could somehow rewrite '#include "re2/stringpiece.h"' to
// #include Chromium's stringpiece then everything would just work.
inline re2::StringPiece StringPieceToRe2(StringPiece sp) {
  return re2::StringPiece(sp.data(), sp.size());
}

inline StringPiece Re2ToStringPiece(re2::StringPiece sp) {
  return StringPiece(sp.data(), sp.size());
}


#endif  // PAGESPEED_KERNEL_UTIL_RE2_H_