Parse PS3_DISC.SFB for redump-style IRDs

2023-11-11 19:50:50 +13:00
parent 5a9cce39ae
commit b794ec8f96
5 changed files with 190 additions and 21 deletions
@@ -0,0 +1,127 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+
+namespace LibIRD
+{
+    /// <summary>
+    /// PS3_DISC.SFB file parsing
+    /// </summary>
+    public class PS3_DiscSFB
+    {
+        /// <summary>
+        /// PS3_DISC.SFB file signature
+        /// </summary>
+        /// <remarks>{ 0x2E, 0x53, 0x46, 0x42 }</remarks>
+        public static readonly string Magic = ".SFB";
+
+        /// <summary>
+        /// PS3_DISC.SFB file version
+        /// </summary>
+        /// <remarks>Typically v1, { 0x00, 0x01 }</remarks>
+        public ushort Version { get; private set; }
+
+        /// <summary>
+        /// A field within the PS3_DISC.SFB file
+        /// </summary>
+        public Dictionary<string, string> Field {  get; private set; }
+
+        /// <summary>
+        /// Constructor using a PARAM.SFO file path
+        /// </summary>
+        /// <param name="sfbPath">Full file path to the PS3_DISC.SFB file</param>
+        /// <exception cref="ArgumentNullException"></exception>
+        public PS3_DiscSFB(string sfbPath)
+        {
+            // Validate file path
+            if (sfbPath == null || sfbPath.Length <= 0)
+                throw new ArgumentNullException(nameof(sfbPath));
+
+            // Read file as a stream, and parse file
+            using FileStream fs = new(sfbPath, FileMode.Open, FileAccess.Read);
+            Parse(fs);
+        }
+
+        /// <summary>
+        /// Parse PS3_DISC.SFB from stream
+        /// </summary>
+        /// <param name="sfbStream">SFB file stream</param>
+        /// <exception cref="FileLoadException"></exception>
+        public PS3_DiscSFB(Stream sfbStream)
+        {
+            // Parse file stream
+            Parse(sfbStream);
+        }
+
+        /// <summary>
+        /// Read fields from PS3_DISC.SFB
+        /// </summary>
+        /// <param name="sfbStream">File stream for PS3_DISC.SFB</param>
+        /// <exception cref="FileLoadException"></exception>
+        private void Parse(Stream sfbStream)
+        {
+            // Read binary stream
+            using BinaryReader br = new(sfbStream);
+
+            // Check file signature is correct
+            string magic = Encoding.ASCII.GetString(br.ReadBytes(4));
+            if (magic != PS3_DiscSFB.Magic)
+                throw new FileLoadException("Unexpected PS3_DISC.SFB file");
+
+            // Read SFB file version
+            byte[] buf = br.ReadBytes(2);
+            Array.Reverse(buf);
+            Version = BitConverter.ToUInt16(buf);
+
+            // Process all field headers
+            sfbStream.Seek(0x20, SeekOrigin.Begin);
+            string field = Encoding.ASCII.GetString(br.ReadBytes(0x10)).Trim('\0');
+            Field = new Dictionary<string, string> { };
+            while (field != null && field != "")
+            {
+                // Find location of value
+                buf = br.ReadBytes(4);
+                Array.Reverse(buf);
+                int offset = BitConverter.ToInt32(buf, 0);
+                buf = br.ReadBytes(4);
+                Array.Reverse(buf);
+                int length = BitConverter.ToInt32(buf, 0);
+
+                // Access and store value
+                long pos = sfbStream.Position;
+                sfbStream.Seek(offset, SeekOrigin.Begin);
+                Field[field] = Encoding.ASCII.GetString(br.ReadBytes(length)).Trim('\0');
+                sfbStream.Seek(pos + 8, SeekOrigin.Begin);
+
+                // Attempt to read new field
+                field = Encoding.ASCII.GetString(br.ReadBytes(0x10)).Trim('\0');
+            }
+        }
+
+        /// <summary>
+        /// Prints formatted parameters extracted from PS3_DISC.SFB to console
+        /// </summary>
+        public void Print()
+        {
+            // Build string from parameters
+            StringBuilder print = new();
+            print.AppendLine("PS3_DISC.SFB Contents:");
+            print.AppendLine("======================");
+
+            // Loop through all parameters in PARAM.SFO
+            foreach (KeyValuePair<string, string> field in Field)
+            {
+                print.Append(field.Key);
+                print.Append(": ");
+                print.AppendLine(field.Value);
+            }
+
+            // Ensure UTF-8 will display properly
+            Console.OutputEncoding = Encoding.UTF8;
+
+            // Print formatted string
+            Console.Write(print);
+        }
+    }
+}