Add PSP GIM support and support for guyzware Inc psp visual novels

ArcFormats/ArcFormats.csproj

@@ -161,6 +161,7 @@
     <Compile Include="FC01\BdtTables.cs" />
     <Compile Include="Fog\ArcDAT.cs" />
     <Compile Include="GScripter\ArcDATA.cs" />
+    <Compile Include="Guyzware\ArcDat.cs" />
     <Compile Include="Ism\ImagePNG.cs" />
     <Compile Include="Kid\ArcDATRAW.cs" />
     <Compile Include="Kid\ArcKLZ.cs" />
@@ -225,6 +226,7 @@
     <Compile Include="NipponIchi\ImageNMT.cs" />
     <Compile Include="NScripter\Script.cs" />
     <Compile Include="Ps1\ImageTIM.cs" />
+    <Compile Include="Psp\ArcGim.cs" />
     <Compile Include="Psp\ArcQPK.cs" />
     <Compile Include="ScrPlayer\ImageIMG.cs" />
     <Compile Include="SingleFileArchive.cs" />

ArcFormats/Guyzware/ArcDat.cs

@@ -0,0 +1,93 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+using GameRes.Utility;
+
+namespace GameRes.Formats.Guyzware
+{
+    [Export(typeof(ArchiveFormat))]
+    public class GdpOpener : ArchiveFormat
+    {
+        public override string Tag => "DAT/GDP";
+        public override string Description => "Guyzware engine";
+        public override uint Signature => 0;
+        public override bool IsHierarchic => false;
+        public override bool CanWrite => false;
+
+        public override ArcFile TryOpen(ArcView file)
+        {
+            int count = file.View.ReadInt32(0);
+            if (!IsSaneCount(count))
+                return null;
+
+            var dir = new List<Entry>(count);
+            long index_offset = 4;
+
+            // heuristic: small first byte = variable
+            byte checkByte = file.View.ReadByte(index_offset);
+            bool isVariableLength = checkByte < 64;
+
+            for (int i = 0; i < count; i++)
+            {
+                if (index_offset >= file.MaxOffset)
+                    break;
+
+                string name;
+                uint offset, size;
+
+                if (isVariableLength)
+                {
+                    // Variable length:
+                    // [1 byte length (ignored)] [Shift-JIS string] [00]
+
+                    index_offset++; // skip length byte
+
+                    var nameBytes = new List<byte>();
+
+                    while (index_offset < file.MaxOffset)
+                    {
+                        byte b = file.View.ReadByte(index_offset++);
+                        if (b == 0)
+                            break;
+
+                        nameBytes.Add(b);
+                    }
+
+                    name = Encodings.cp932.GetString(nameBytes.ToArray());
+                }
+                else
+                {
+                    // Fixed 32 bytes
+
+                    name = file.View.ReadString(index_offset, 32, Encodings.cp932);
+                    name = name.TrimEnd('\0', ' ');
+                    index_offset += 32;
+                }
+
+                offset = file.View.ReadUInt32(index_offset);
+                size   = file.View.ReadUInt32(index_offset + 4);
+                index_offset += 8;
+
+                var entry = new Entry
+                {
+                    Name = name,
+                    Offset = offset,
+                    Size = size,
+                };
+
+                if (!entry.CheckPlacement(file.MaxOffset))
+                    return null;
+
+                dir.Add(entry);
+            }
+
+            return new ArcFile(file, this, dir);
+        }
+
+        public override Stream OpenEntry(ArcFile arc, Entry entry)
+        {
+            return arc.File.CreateStream(entry.Offset, entry.Size);
+        }
+    }
+}