src/kudu/util/path_util.cc

// 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.

#include "kudu/util/path_util.h"

// Use the POSIX version of dirname(3).
#include <libgen.h>

#include <glog/logging.h>
#include <string>

#include "kudu/gutil/gscoped_ptr.h"

#if defined(__APPLE__)
#include "kudu/util/locks.h"
#endif // defined(__APPLE__)

using std::string;

namespace kudu {

std::string JoinPathSegments(const std::string &a,
                             const std::string &b) {
  CHECK(!a.empty()) << "empty first component: " << a;
  CHECK(!b.empty() && b[0] != '/')
    << "second path component must be non-empty and relative: "
    << b;
  if (a[a.size() - 1] == '/') {
    return a + b;
  } else {
    return a + "/" + b;
  }
}

string DirName(const string& path) {
  gscoped_ptr<char[], FreeDeleter> path_copy(strdup(path.c_str()));
#if defined(__APPLE__)
  static Mutex lock;
  lock_guard<Mutex> l(&lock);
#endif // defined(__APPLE__)
  return ::dirname(path_copy.get());
}

string BaseName(const string& path) {
  gscoped_ptr<char[], FreeDeleter> path_copy(strdup(path.c_str()));
  return basename(path_copy.get());
}

} // namespace kudu