using System;
using System.Runtime.InteropServices;
using System.Text;

class IniFile {

	[DllImport("kernel32", SetLastError=true)]
	private static extern int WritePrivateProfileString(string pSection, string pKey, string pValue, string pFile);
	[DllImport("kernel32", SetLastError=true)]
	private static extern int WritePrivateProfileStruct(string pSection, string pKey, string pValue, int pValueLen, string pFile);
	[DllImport("kernel32", SetLastError=true)]
	private static extern int GetPrivateProfileString(string pSection, string pKey, string pDefault, byte[] prReturn, int pBufferLen, string pFile);
	[DllImport("kernel32", SetLastError=true)]
	private static extern int GetPrivateProfileStruct(string pSection, string pKey, byte[] prReturn, int pBufferLen, string pFile);

	private int li_BufferLen;
	private Encoding le_Encoding;

	/// IniFile Constructor
	public IniFile(){
		le_Encoding = Encoding.Default;
		li_BufferLen = 256;
	}

	/// Encoding
	public Encoding FileEncoding{
		get{
			return(le_Encoding);
		}
		set{
			le_Encoding = value;
		}
	}

	// Max return length when reading data (Max: 32767)
	public int BufferLen{
		get{
			return li_BufferLen;
		}
		set{
			if(value > Int16.MaxValue){
				li_BufferLen = Int16.MaxValue;
			} else if(value < 1){
				li_BufferLen = 1;
			} else{
				li_BufferLen = value;
			}
		}
	}

	public string ReadValue(string pFile, string pSection, string pKey, string pDefault){
		return(z_GetString(pFile, pSection, pKey, pDefault));
	}

	public string ReadValue(string pFile, string pSection, string pKey){
		return(z_GetString(pFile, pSection, pKey, ""));
	}

	public void WriteValue(string pFile, string pSection, string pKey, string pValue){
		WritePrivateProfileString(pSection, pKey, pValue, pFile);
	}

	public void RemoveKey(string pFile, string pSection, string pKey){
		WritePrivateProfileString(pSection, pKey, null, pFile);
	}

	public Array ReadKeys(string pFile, string pSection){
		return(z_GetString(pFile, pSection, null, null).Split((char) 0));
	}

	public Array ReadSections(string pFile){
		return(z_GetString(pFile, null, null, null).Split((char) 0));
	}

	public void RemoveSection(string pFile, string pSection){
		WritePrivateProfileString(pSection, null, null, pFile);
	}

	private string z_GetString(string pFile, string pSection, string pKey, string pDefault){
		string sRet = pDefault;
		byte[] bRet = new byte[li_BufferLen];
		int i = GetPrivateProfileString(pSection, pKey, pDefault, bRet, li_BufferLen, pFile);
		sRet = le_Encoding.GetString(bRet, 0, i).TrimEnd((char) 0);
		return(sRet);
	}
}