From 01656b767bb83472b1d741a430eab10070d762d4 Mon Sep 17 00:00:00 2001
From: Natalia Portillo <claunia@claunia.com>
Date: Mon, 7 Aug 2017 16:15:28 +0100
Subject: [PATCH] 	Added support for Plan9 partition tables.

---
 .../DiscImageChef.Partitions.csproj           |  3 +-
 DiscImageChef.Partitions/Plan9.cs             | 52 ++++++++++++++++++-
 README.md                                     |  1 +
 3 files changed, 53 insertions(+), 3 deletions(-)

diff --git a/DiscImageChef.Partitions/DiscImageChef.Partitions.csproj b/DiscImageChef.Partitions/DiscImageChef.Partitions.csproj
index c87361e0d..51eb378fb 100644
--- a/DiscImageChef.Partitions/DiscImageChef.Partitions.csproj
+++ b/DiscImageChef.Partitions/DiscImageChef.Partitions.csproj
@@ -55,6 +55,7 @@
     <Compile Include="Xbox.cs" />
     <Compile Include="UNIX.cs" />
     <Compile Include="XENIX.cs" />
+    <Compile Include="Plan9.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>
@@ -96,7 +97,7 @@
             <inheritsSet />
             <inheritsScope />
           </TextStylePolicy>
-          <CSharpFormattingPolicy IndentBlock="True" IndentBraces="False" IndentSwitchSection="True" IndentSwitchCaseSection="True" LabelPositioning="OneLess" NewLinesForBracesInTypes="True" NewLinesForBracesInMethods="True" NewLinesForBracesInProperties="True" NewLinesForBracesInAccessors="True" NewLinesForBracesInAnonymousMethods="True" NewLinesForBracesInControlBlocks="True" NewLinesForBracesInAnonymousTypes="True" NewLinesForBracesInObjectCollectionArrayInitializers="True" NewLinesForBracesInLambdaExpressionBody="True" NewLineForElse="True" NewLineForCatch="True" NewLineForFinally="True" NewLineForMembersInObjectInit="True" NewLineForMembersInAnonymousTypes="True" NewLineForClausesInQuery="True" SpacingAfterMethodDeclarationName="False" SpaceWithinMethodDeclarationParenthesis="False" SpaceBetweenEmptyMethodDeclarationParentheses="False" SpaceAfterMethodCallName="False" SpaceWithinMethodCallParentheses="False" SpaceBetweenEmptyMethodCallParentheses="False" SpaceAfterControlFlowStatementKeyword="False" SpaceWithinExpressionParentheses="False" SpaceWithinCastParentheses="False" SpaceWithinOtherParentheses="False" SpaceAfterCast="False" SpacesIgnoreAroundVariableDeclaration="False" SpaceBeforeOpenSquareBracket="False" SpaceBetweenEmptySquareBrackets="False" SpaceWithinSquareBrackets="False" SpaceAfterColonInBaseTypeDeclaration="True" SpaceAfterComma="True" SpaceAfterDot="False" SpaceAfterSemicolonsInForStatement="True" SpaceBeforeColonInBaseTypeDeclaration="True" SpaceBeforeComma="False" SpaceBeforeDot="False" SpaceBeforeSemicolonsInForStatement="False" SpacingAroundBinaryOperator="Single" WrappingPreserveSingleLine="True" WrappingKeepStatementsOnSingleLine="True" PlaceSystemDirectiveFirst="True" scope="text/x-csharp">
+          <CSharpFormattingPolicy IndentBlock="True" IndentBraces="False" IndentSwitchSection="True" IndentSwitchCaseSection="True" LabelPositioning="OneLess" NewLinesForBracesInTypes="True" NewLinesForBracesInMethods="True" NewLinesForBracesInProperties="True" NewLinesForBracesInAccessors="True" NewLinesForBracesInAnonymousMethods="True" NewLinesForBracesInControlBlocks="True" NewLinesForBracesInAnonymousTypes="True" NewLinesForBracesInObjectCollectionArrayInitializers="True" NewLinesForBracesInLambdaExpressionBody="True" NewLineForElse="True" NewLineForCatch="True" NewLineForFinally="True" NewLineForMembersInObjectInit="True" NewLineForMembersInAnonymousTypes="True" NewLineForClausesInQuery="True" SpacingAfterMethodDeclarationName="False" SpaceWithinMethodDeclarationParenthesis="False" SpaceBetweenEmptyMethodDeclarationParentheses="False" SpaceAfterMethodCallName="False" SpaceWithinMethodCallParentheses="False" SpaceBetweenEmptyMethodCallParentheses="False" SpaceWithinExpressionParentheses="False" SpaceWithinCastParentheses="False" SpaceWithinOtherParentheses="False" SpaceAfterCast="False" SpacesIgnoreAroundVariableDeclaration="False" SpaceBeforeOpenSquareBracket="False" SpaceBetweenEmptySquareBrackets="False" SpaceWithinSquareBrackets="False" SpaceAfterColonInBaseTypeDeclaration="True" SpaceAfterComma="True" SpaceAfterDot="False" SpaceAfterSemicolonsInForStatement="True" SpaceBeforeColonInBaseTypeDeclaration="True" SpaceBeforeComma="False" SpaceBeforeDot="False" SpaceBeforeSemicolonsInForStatement="False" SpacingAroundBinaryOperator="Single" WrappingPreserveSingleLine="True" WrappingKeepStatementsOnSingleLine="True" PlaceSystemDirectiveFirst="True" SpaceAfterControlFlowStatementKeyword="False" scope="text/x-csharp">
             <inheritsSet />
             <inheritsScope />
           </CSharpFormattingPolicy>
diff --git a/DiscImageChef.Partitions/Plan9.cs b/DiscImageChef.Partitions/Plan9.cs
index 51b6d8ee2..c5683eaca 100644
--- a/DiscImageChef.Partitions/Plan9.cs
+++ b/DiscImageChef.Partitions/Plan9.cs
@@ -30,12 +30,60 @@
 // Copyright © 2011-2017 Natalia Portillo
 // ****************************************************************************/
 using System;
-namespace DiscImageChef.Partitions
+using System.Collections.Generic;
+using DiscImageChef.CommonTypes;
+
+namespace DiscImageChef.PartPlugins
 {
-    public class Plan9
+    // This is the most stupid or the most intelligent partition scheme ever done, pick or take
+    // At sector 1 from offset, text resides (yes, TEXT) in following format:
+    // "part type start end\n"
+    // One line per partition, start and end relative to offset
+    // e.g.: "part nvram 10110 10112\npart fossil 10112 3661056\n"
+    public class Plan9 : PartPlugin
     {
         public Plan9()
         {
+            Name = "Plan9 partition table";
+            PluginUUID = new Guid("F0BF4FFC-056E-4E7C-8B65-4EAEE250ADD9");
+        }
+
+        public override bool GetInformation(ImagePlugins.ImagePlugin imagePlugin, out List<Partition> partitions, ulong sectorOffset)
+        {
+            partitions = new List<Partition>();
+            byte[] sector = imagePlugin.ReadSector(sectorOffset + 1);
+            // While all of Plan9 is supposedly UTF-8, it uses ASCII strcmp for reading its partition table
+            string[] really = StringHandlers.CToString(sector).Split(new[] {'\n'});
+
+            foreach(string part in really)
+            {
+                if(part.Length < 5 || part.Substring(0, 5) != "part ")
+                    break;
+
+                string[] tokens = part.Split(new[] { ' ' });
+
+                if(tokens.Length != 4)
+                    break;
+
+                if(!ulong.TryParse(tokens[2], out ulong start) ||
+                   !ulong.TryParse(tokens[3], out ulong end))
+                    break;
+
+                Partition _part = new Partition
+                {
+                    Length = (end - start) + 1,
+                    Offset = (start + sectorOffset) * imagePlugin.GetSectorSize(),
+                    Scheme = Name,
+                    Sequence = (ulong)partitions.Count,
+                    Size = ((end - start) + 1) * imagePlugin.GetSectorSize(),
+                    Start = start + sectorOffset,
+                    Type = tokens[1]
+                };
+
+                partitions.Add(_part);
+            }
+
+            return partitions.Count>0;
         }
     }
 }
diff --git a/README.md b/README.md
index 2b7979b8f..b965938bf 100644
--- a/README.md
+++ b/README.md
@@ -85,6 +85,7 @@ Supported partitioning schemes
 * Minix subpartitions inside MBR
 * NEC PC9800 partitions
 * NeXT disklabel
+* Plan9 partition table
 * Rio Karma partitions
 * SGI volume headers
 * Solaris slices inside MBR