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/* Copyright (c) 2010 Daniel Doubrovkine, All Rights Reserved
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.  
 */
package com.sun.jna.platform.win32;

import java.util.Arrays;
import java.util.List;

import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.Structure;
import com.sun.jna.win32.StdCallLibrary;

/**
 * Ported from Wdm.h.
 * Microsoft Windows DDK.
 * @author dblock[at]dblock.org
 */
public interface Wdm extends StdCallLibrary {
	
    /**
     * The KEY_BASIC_INFORMATION structure defines a subset of 
     * the full information that is available for a registry key.
     */
    public static class KEY_BASIC_INFORMATION extends Structure {		
        public KEY_BASIC_INFORMATION() {
            super();
        }

        public KEY_BASIC_INFORMATION(int size) {
            NameLength = size - 16; // write time, title index and name length
            Name = new char[NameLength];
            allocateMemory();
        }
		
        public KEY_BASIC_INFORMATION(Pointer memory) {
            super(memory);
            read();
        }
				
        /**
         * The last time the key or any of its values changed. 
         */
        public long LastWriteTime;
        /**
         * Device and intermediate drivers should ignore this member.
         */
        public int TitleIndex;
        /**
         * Specifies the size in bytes of the following name. 
         */
        public int NameLength;
        /**
         * A string of Unicode characters naming the key. 
         * The string is not null-terminated.
         */
        public char[] Name;
        
        protected List getFieldOrder() {
            return Arrays.asList(new String[] { "LastWriteTime", "TitleIndex", "NameLength", "Name" });
        }
        /**
         * Name of the key.
         * @return String.
         */
        public String getName() {
            return Native.toString(Name);
        }
		
        public void read() {
            super.read();
            Name = new char[NameLength / 2];
            readField("Name");			
        }
    }
	
    /**
     * The KEY_INFORMATION_CLASS enumeration type represents 
     * the type of information to supply about a registry key.
     */
    public abstract class KEY_INFORMATION_CLASS { 
        public static final int KeyBasicInformation = 0;
        public static final int KeyNodeInformation = 1;
        public static final int KeyFullInformation = 2;
        public static final int KeyNameInformation = 3;
        public static final int KeyCachedInformation = 4;
        public static final int KeyVirtualizationInformation = 5;
    }
}