(Legacy): implemented Pochette PAC archives.

Legacy/Pochette/ArcPAC.cs

@@ -0,0 +1,88 @@
+//! \file       ArcPAC.cs
+//! \date       2019 Mar 26
+//! \brief      Pochette resource archive.
+//
+// Copyright (C) 2019 by morkt
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//
+
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+
+namespace GameRes.Formats.Pochette
+{
+    [Export(typeof(ArchiveFormat))]
+    public class PacOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "PAC/IDX"; } }
+        public override string Description { get { return "Pochette resource archive"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public PacOpener ()
+        {
+            ContainedFormats = new[] { "GDT", "WAV" };
+        }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (!file.Name.HasExtension (".pac"))
+                return null;
+            var idx_name = Path.ChangeExtension (file.Name, ".idx");
+            if (!VFS.FileExists (idx_name))
+                return null;
+            var base_name = Path.GetFileNameWithoutExtension (file.Name);
+            string type = "";
+            if (base_name.StartsWith ("GDT", StringComparison.OrdinalIgnoreCase))
+                type = "image";
+            else if (base_name.StartsWith ("WAV", StringComparison.OrdinalIgnoreCase))
+                type = "audio";
+            List<Entry> dir = null;
+            using (var idx = VFS.OpenView (idx_name))
+            {
+                if ((idx.MaxOffset & 0xF) != 0)
+                    return null;
+                int count = (int)idx.MaxOffset / 0x10;
+                if (!IsSaneCount (count))
+                    return null;
+                uint idx_pos = 0;
+                dir = new List<Entry> (count);
+                for (int i = 0; i < count; ++i)
+                {
+                    uint name_length = idx.View.ReadByte (idx_pos);
+                    var name = idx.View.ReadString (idx_pos+1, name_length);
+                    if (string.IsNullOrWhiteSpace (name))
+                        return null;
+                    var entry = new Entry { Name = name, Type = type };
+                    entry.Offset = idx.View.ReadUInt32 (idx_pos+8);
+                    entry.Size   = idx.View.ReadUInt32 (idx_pos+12);
+                    if (!entry.CheckPlacement (file.MaxOffset))
+                        return null;
+                    dir.Add (entry);
+                    idx_pos += 0x10;
+                }
+            }
+            return new ArcFile (file, this, dir);
+        }
+    }
+}