From ff871fd14626c1e13c9cfd7fff623d212bb216de Mon Sep 17 00:00:00 2001
From: morkt <muvluv.ru@gmail.com>
Date: Thu, 13 Oct 2016 10:57:44 +0400
Subject: [PATCH] implemented Circus CRM archives.

---
 ArcFormats/ArcFormats.csproj |  1 +
 ArcFormats/Circus/ArcCRM.cs  | 77 ++++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+)
 create mode 100644 ArcFormats/Circus/ArcCRM.cs

diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 2b797792..83cf294f 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -94,6 +94,7 @@
     <Compile Include="CaramelBox\ArcARC3.cs" />
     <Compile Include="CaramelBox\ArcARC4.cs" />
     <Compile Include="CaramelBox\ImageFCB.cs" />
+    <Compile Include="Circus\ArcCRM.cs" />
     <Compile Include="Cmvs\ArcPBZ.cs" />
     <Compile Include="Cmvs\AudioMV.cs" />
     <Compile Include="Cmvs\ImagePSB.cs" />
diff --git a/ArcFormats/Circus/ArcCRM.cs b/ArcFormats/Circus/ArcCRM.cs
new file mode 100644
index 00000000..2bbdc561
--- /dev/null
+++ b/ArcFormats/Circus/ArcCRM.cs
@@ -0,0 +1,77 @@
+//! \file       ArcCRM.cs
+//! \date       Wed Oct 12 14:15:11 2016
+//! \brief      Circus resource archive.
+//
+// Copyright (C) 2016 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.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.Linq;
+
+namespace GameRes.Formats.Circus
+{
+    [Export(typeof(ArchiveFormat))]
+    public class CrmOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "CRM"; } }
+        public override string Description { get { return "Circus image archive"; } }
+        public override uint     Signature { get { return 0x42585243; } } // 'CRXB'
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            int count = file.View.ReadInt32 (8);
+            if (!IsSaneCount (count))
+                return null;
+
+            int index_offset = 0x10;
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                uint offset = file.View.ReadUInt32 (index_offset);
+                var name = file.View.ReadString (index_offset+8, 0x18);
+                var entry = FormatCatalog.Instance.Create<Entry> (name);
+                entry.Offset = offset;
+                dir.Add (entry);
+                index_offset += 0x20;
+            }
+            using (var iterator = dir.OrderBy (e => e.Offset).GetEnumerator())
+            {
+                if (iterator.MoveNext())
+                {
+                    for (;;)
+                    {
+                        var entry = iterator.Current;
+                        if (!iterator.MoveNext())
+                        {
+                            entry.Size = (uint)(file.MaxOffset - entry.Offset);
+                            break;
+                        }
+                        entry.Size = (uint)(iterator.Current.Offset - entry.Offset);
+                    }
+                }
+            }
+            return new ArcFile (file, this, dir);
+        }
+    }
+}