From 363793d9cb933b1d5ece15e03153ccfceb1ff41b Mon Sep 17 00:00:00 2001
From: Alexander Karatarakis <alex@karatarakis.com>
Date: Wed, 21 Nov 2012 15:51:54 +0200
Subject: [PATCH] Add new interface: IStorageIndexer

Signed-off-by: Alexander Karatarakis <alex@karatarakis.com>
---
 .../Storage/Indexers/IStorageIndexer.cs       | 28 +++++++++++++++++++
 src/Numerics/Numerics.csproj                  |  4 +++
 2 files changed, 32 insertions(+)
 create mode 100644 src/Numerics/LinearAlgebra/Storage/Indexers/IStorageIndexer.cs

diff --git a/src/Numerics/LinearAlgebra/Storage/Indexers/IStorageIndexer.cs b/src/Numerics/LinearAlgebra/Storage/Indexers/IStorageIndexer.cs
new file mode 100644
index 00000000..7b86b5fc
--- /dev/null
+++ b/src/Numerics/LinearAlgebra/Storage/Indexers/IStorageIndexer.cs
@@ -0,0 +1,28 @@
+namespace MathNet.Numerics.LinearAlgebra.Storage.Indexers
+{
+    /// <summary>
+    ///  Abstract class that defines common features for all storage schemes. 
+    /// </summary>
+    public interface IStorageIndexer
+    {
+        /// <summary>
+        ///  Retrieves the index of the requested element without parameter checking.
+        ///  </summary><param name="row">
+        ///  The row of the element. 
+        ///  </param><param name="column">
+        ///  The column of the element. 
+        ///  </param><returns>
+        ///  The requested index. 
+        /// </returns>
+        int IndexOf(int row, int column);
+
+        /// <summary>
+        ///  Retrieves the index of the requested diagonal element without parameter checking.
+        ///  </summary><param name="row">
+        ///  The row=column of the diagonal element. 
+        ///  </param><returns>
+        ///  The requested index. 
+        /// </returns>
+        int IndexOfDiagonal(int row);
+    }
+}
diff --git a/src/Numerics/Numerics.csproj b/src/Numerics/Numerics.csproj
index 18d2fdbb..36973819 100644
--- a/src/Numerics/Numerics.csproj
+++ b/src/Numerics/Numerics.csproj
@@ -141,6 +141,7 @@
     <Compile Include="Distributions\Multivariate\MatrixNormal.cs" />
     <Compile Include="Distributions\Multivariate\Wishart.cs" />
     <Compile Include="LinearAlgebra\Storage\DenseVectorStorage.cs" />
+    <Compile Include="LinearAlgebra\Storage\Indexers\IStorageIndexer.cs" />
     <Compile Include="LinearAlgebra\Storage\MatrixStorage.Validation.cs" />
     <Compile Include="LinearAlgebra\Complex32\ExtensionMethods.cs" />
     <Compile Include="LinearAlgebra\Complex32\Factorization\Cholesky.cs" />
@@ -480,6 +481,9 @@
   <ItemGroup>
     <None Include="MathNet.Numerics.snk" />
   </ItemGroup>
+  <ItemGroup>
+    <Folder Include="LinearAlgebra\Storage\Indexers\Static\" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
     <PreBuildEvent>