Gen3-WCTool/WC3Tool/WC3/FILEIO.cs

/*
 * Created by SharpDevelop.
 * User: suloku
 * Date: 28/04/2016
 * Time: 21:23
 * 
 * To change this template use Tools | Options | Coding | Edit Standard Headers.
 */

using System;
using System.Windows.Forms;
using System.IO;

namespace WC3Tool
{
	/// <summary>
	/// Description of FILEIO.
	/// </summary>
	public class FileIO
	{
		/// <summary>
		/// Reads data into a complete array, throwing an EndOfStreamException
		/// if the stream runs out of data first, or if an IOException
		/// naturally occurs.
		/// </summary>
		/// <param name="stream">The stream to read data from</param>
		/// <param name="data">The array to read bytes into. The array
		/// will be completely filled from the stream, so an appropriate
		/// size must be given.</param>
		private static void ReadWholeArray(Stream stream, ref byte[] data)
		{
			int offset = 0;
			int remaining = data.Length;
			while (remaining > 0)
			{
				int read = stream.Read(data, offset, remaining);
				if (read <= 0)
					throw new EndOfStreamException
						($"End of stream reached with {remaining} bytes left to read");
				remaining -= read;
				offset += read;
			}
		}

		private static void _read_data(ref byte[] buffer, string path)
		{
			FileStream saveFile;
			saveFile = new FileStream(path, FileMode.Open);
			if (saveFile.Length < 1)
			{
				MessageBox.Show("Invalid file length", "Error");
				return;
			}

			buffer = new byte[saveFile.Length];
			//MessageBox.Show(buffer.Length.ToString());
			ReadWholeArray(saveFile, ref buffer);
			saveFile.Close();
		}

		public static int load_file(ref byte[] buffer, ref string path, string filter)
		{
			if (path == null)
			{
				OpenFileDialog openFD = new OpenFileDialog();
				//openFD.InitialDirectory = "c:\\";
				openFD.Filter = filter;
				DialogResult result = openFD.ShowDialog();
				if (result == DialogResult.OK)
				{
					#region filename

					path = openFD.FileName;
					//MessageBox.Show(path.ToString());

					#endregion

					_read_data(ref buffer, path);
					//MessageBox.Show(buffer.Length.ToString());
					return buffer.Length;
				}

				return -1;
			}

			_read_data(ref buffer, path);
			//MessageBox.Show(buffer.Length.ToString());
			return buffer.Length;
		}

		public static void save_data(byte[] buffer, string filter)
		{
			//if (savegamename.Text.Length < 1) return;
			if (buffer == null) return;
			SaveFileDialog saveFD = new SaveFileDialog();
			//saveFD.InitialDirectory = "c:\\";
			saveFD.Filter = filter;
			if (saveFD.ShowDialog() == DialogResult.OK)
			{
				FileStream saveFile = new FileStream(saveFD.FileName, FileMode.Create);
				//Write file
				saveFile.Write(buffer, 0, buffer.Length);
				saveFile.Close();
				MessageBox.Show("File Saved.", "Save file");
			}
		}
	}
}