[ArchiveTools, DATFromDir, DatTools, SimpleSort] More code modularization to make it more stable and clean

SabreTools.Helper/Tools/DatTools.cs

@@ -2,9 +2,12 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Security.Cryptography;
 using System.Text.RegularExpressions;
 using System.Xml;
 
+using DamienG.Security.Cryptography;
+
 namespace SabreTools.Helper
 {
 	public class DatTools
@@ -1831,7 +1834,8 @@ namespace SabreTools.Helper
 		/// <param name="nodump">Select roms with nodump status as follows: null (match all), true (match Nodump only), false (exclude Nodump)</param>
 		/// <param name="logger">Logging object for console and file output</param>
 		/// <returns>Returns filtered DatData object</returns>
-		public static DatData Filter(DatData datdata, string gamename, string romname, string romtype, long sgt, long slt, long seq, string crc, string md5, string sha1, bool? nodump, Logger logger)
+		public static DatData Filter(DatData datdata, string gamename, string romname, string romtype, long sgt,
+			long slt, long seq, string crc, string md5, string sha1, bool? nodump, Logger logger)
 		{
 			// Now loop through and create a new Rom dictionary using filtered values
 			Dictionary<string, List<RomData>> dict = new Dictionary<string, List<RomData>>();
@@ -1981,5 +1985,52 @@ namespace SabreTools.Helper
 
 			return datdata;
 		}
+
+		/// <summary>
+		/// Retrieve file information for a single file
+		/// </summary>
+		/// <param name="input">Filename to get information from</param>
+		/// <returns>Populated RomData object if success, empty one on error</returns>
+		public static RomData GetSingleFileInfo(string input)
+		{
+			RomData rom = new RomData
+			{
+				Name = Path.GetFileName(input),
+				Type = "rom",
+				Size = (new FileInfo(input)).Length,
+				CRC = string.Empty,
+				MD5 = string.Empty,
+				SHA1 = string.Empty,
+			};
+
+			try
+			{
+				Crc32 crc = new Crc32();
+				MD5 md5 = MD5.Create();
+				SHA1 sha1 = SHA1.Create();
+
+				using (FileStream fs = File.Open(input, FileMode.Open))
+				{
+					foreach (byte b in crc.ComputeHash(fs))
+					{
+						rom.CRC += b.ToString("x2").ToLowerInvariant();
+					}
+				}
+				using (FileStream fs = File.Open(input, FileMode.Open))
+				{
+					rom.MD5 = BitConverter.ToString(md5.ComputeHash(fs)).Replace("-", "").ToLowerInvariant();
+				}
+				using (FileStream fs = File.Open(input, FileMode.Open))
+				{
+					rom.SHA1 = BitConverter.ToString(sha1.ComputeHash(fs)).Replace("-", "").ToLowerInvariant();
+				}
+			}
+			catch (IOException)
+			{
+				return new RomData();
+			}
+
+			return rom;
+		}
 	}
 }