/*
 * 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.
 */

using System;

namespace Lucene.Net.Support
{
    /// <summary>
    /// Provides platform infos.
    /// </summary>
    public class Os
    {
        static bool isUnix;
        static bool isWindows;

        static Os()
        {
            PlatformID pid = Environment.OSVersion.Platform;
            isWindows = pid == PlatformID.Win32NT || pid == PlatformID.Win32Windows;

            // we use integers instead of enum tags because "MacOS"
            // requires 2.0 SP2, 3.0 SP2 or 3.5 SP1.
            // 128 is mono's old platform tag for Unix.
            int id = (int)pid;
            isUnix = id == 4 || id == 6 || id == 128;
        }

        /// <summary>
        /// Whether we run under a Unix platform.
        /// </summary>
        public static bool IsUnix
        {
            get { return isUnix; }
        }

        /// <summary>
        /// Whether we run under a supported Windows platform.
        /// </summary>
        public static bool IsWindows
        {
            get { return isWindows; }
        }
    }
}