[SL.Core] Merge pull request SixLabors/Core#16 from carbon/master

Improve CQ1

src/SixLabors.Core/Helpers/DebugGuard.cs

@@ -24,7 +24,7 @@ namespace SixLabors
         public static void NotNull<T>(T target, string parameterName)
             where T : class
         {
-            if (target == null)
+            if (target is null)
             {
                 throw new ArgumentNullException(parameterName);
             }
@@ -116,50 +116,6 @@ namespace SixLabors
             }
         }
 
-        /// <summary>
-        /// Verifies, that the method parameter with specified target value is true
-        /// and throws an exception if it is found to be so.
-        /// </summary>
-        /// <param name="target">
-        /// The target value, which cannot be false.
-        /// </param>
-        /// <param name="parameterName">
-        /// The name of the parameter that is to be checked.
-        /// </param>
-        /// <param name="message">
-        /// The error message, if any to add to the exception.
-        /// </param>
-        /// <exception cref="ArgumentException">
-        /// <paramref name="target"/> is false
-        /// </exception>
-        [Conditional("DEBUG")]
-        public static void IsTrue(bool target, string parameterName, string message)
-        {
-            if (!target)
-            {
-                throw new ArgumentException(message, parameterName);
-            }
-        }
-
-        /// <summary>
-        /// Verifies, that the method parameter with specified target value is false
-        /// and throws an exception if it is found to be so.
-        /// </summary>
-        /// <param name="target">The target value, which cannot be true.</param>
-        /// <param name="parameterName">The name of the parameter that is to be checked.</param>
-        /// <param name="message">The error message, if any to add to the exception.</param>
-        /// <exception cref="ArgumentException">
-        /// <paramref name="target"/> is true
-        /// </exception>
-        [Conditional("DEBUG")]
-        public static void IsFalse(bool target, string parameterName, string message)
-        {
-            if (target)
-            {
-                throw new ArgumentException(message, parameterName);
-            }
-        }
-
         /// <summary>
         /// Verifies, that the `target` array has declared the length  or longer.
         /// </summary>

src/SixLabors.Core/Helpers/Guard.cs

@@ -14,78 +14,6 @@ namespace SixLabors
     [DebuggerStepThrough]
     internal static class Guard
     {
-        /// <summary>
-        /// Verifies, that the method parameter with specified object value is not null
-        /// and throws an exception if it is found to be so.
-        /// </summary>
-        /// <param name="target">The target object, which cannot be null.</param>
-        /// <param name="parameterName">The name of the parameter that is to be checked.</param>
-        /// <param name="message">The error message, if any to add to the exception.</param>
-        /// <exception cref="ArgumentNullException"><paramref name="target"/> is null</exception>
-        /// <typeparam name="T">The type of the object to verify</typeparam>
-        public static void NotNull<T>(T target, string parameterName, string message = "")
-            where T : class
-        {
-            if (target == null)
-            {
-                if (!string.IsNullOrWhiteSpace(message))
-                {
-                    throw new ArgumentNullException(parameterName, message);
-                }
-
-                throw new ArgumentNullException(parameterName);
-            }
-        }
-
-        /// <summary>
-        /// Verifies, that the string method parameter with specified object value and message
-        /// is not null, not empty and does not contain only blanks and throws an exception
-        /// if the object is null.
-        /// </summary>
-        /// <param name="target">The target string, which should be checked against being null or empty.</param>
-        /// <param name="parameterName">Name of the parameter.</param>
-        /// <param name="message">The error message, if any to add to the exception.</param>
-        /// <exception cref="ArgumentNullException"><paramref name="target"/> is null.</exception>
-        /// <exception cref="ArgumentException"><paramref name="target"/> is empty or contains only blanks.</exception>
-        public static void NotNullOrEmpty(string target, string parameterName, string message = "")
-        {
-            NotNull(target, parameterName, message);
-
-            if (string.IsNullOrWhiteSpace(target))
-            {
-                if (!string.IsNullOrWhiteSpace(message))
-                {
-                    throw new ArgumentException(message, parameterName);
-                }
-
-                throw new ArgumentException("Value cannot be null, empty, or cannot contain only whitespace.", parameterName);
-            }
-        }
-
-        /// <summary>
-        /// Verifies, that the enumeration is not null and not empty.
-        /// </summary>
-        /// <typeparam name="T">The type of objects in the <paramref name="target"/></typeparam>
-        /// <param name="target">The target enumeration, which should be checked against being null or empty.</param>
-        /// <param name="parameterName">Name of the parameter.</param>
-        /// <param name="message">The error message, if any to add to the exception.</param>
-        /// <exception cref="ArgumentNullException"><paramref name="target"/> is null.</exception>
-        /// <exception cref="ArgumentException"><paramref name="target"/> is empty.</exception>
-        public static void NotNullOrEmpty<T>(IEnumerable<T> target, string parameterName, string message = "")
-        {
-            NotNull(target, parameterName, message);
-
-            if (!target.Any())
-            {
-                if (!string.IsNullOrWhiteSpace(message))
-                {
-                    throw new ArgumentException(message, parameterName);
-                }
-
-                throw new ArgumentException("Value cannot be empty.", parameterName);
-            }
-        }
-
         /// <summary>
         /// Verifies that the specified value is less than a maximum value
         /// and throws an exception if it is not.
@@ -187,48 +115,6 @@ namespace SixLabors
             }
         }
 
-        /// <summary>
-        /// Verifies, that the method parameter with specified target value is true
-        /// and throws an exception if it is found to be so.
-        /// </summary>
-        /// <param name="value">
-        /// The target value, which cannot be false.
-        /// </param>
-        /// <param name="parameterName">
-        /// The name of the parameter that is to be checked.
-        /// </param>
-        /// <param name="message">
-        /// The error message, if any to add to the exception.
-        /// </param>
-        /// <exception cref="ArgumentException">
-        /// <paramref name="value"/> is false
-        /// </exception>
-        public static void IsTrue(bool value, string parameterName, string message)
-        {
-            if (!value)
-            {
-                throw new ArgumentException(message, parameterName);
-            }
-        }
-
-        /// <summary>
-        /// Verifies, that the method parameter with specified target value is false
-        /// and throws an exception if it is found to be so.
-        /// </summary>
-        /// <param name="value">The target value, which cannot be true.</param>
-        /// <param name="parameterName">The name of the parameter that is to be checked.</param>
-        /// <param name="message">The error message, if any to add to the exception.</param>
-        /// <exception cref="ArgumentException">
-        /// <paramref name="value"/> is true
-        /// </exception>
-        public static void IsFalse(bool value, string parameterName, string message)
-        {
-            if (value)
-            {
-                throw new ArgumentException(message, parameterName);
-            }
-        }
-
         /// <summary>
         /// Verifies, that the `target` span has the length of 'minLength', or longer.
         /// </summary>

src/SixLabors.Core/Helpers/HashHelpers.cs

@@ -1,10 +1,12 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
+
 namespace SixLabors
 {
     /// <summary>
-    /// Lifted from coreFX repo
+    /// Provides a set of helpers for combining object hashes.
     /// </summary>
     internal static class HashHelpers
     {
@@ -13,9 +15,11 @@ namespace SixLabors
         /// </summary>
         /// <param name="h1">Hash code one</param>
         /// <param name="h2">Hash code two</param>
-        /// <returns>Returns a hash code for the two specified has codes.</returns>
+        /// <returns>Returns a hash code for the provided hash codes.</returns>
         public static int Combine(int h1, int h2)
         {
+            // Lifted from coreFX repo
+
             unchecked
             {
                 // RyuJIT optimizes this to use the ROL instruction
@@ -24,5 +28,38 @@ namespace SixLabors
                 return ((int)rol5 + h1) ^ h2;
             }
         }
+
+        /// <summary>
+        /// Combines the three specified hash codes.
+        /// </summary>
+        /// <param name="h1">The first </param>
+        /// <param name="h2">Hash code two</param>
+        /// <param name="h3">Hash code three</param>
+        /// <returns>Returns a hash code for the provided hash codes.</returns>
+        public static int Combine(int h1, int h2, int h3)
+        {
+            int hash = Combine(h1, h2);
+
+            hash = Combine(hash, h3);
+
+            return hash;
+        }
+
+        /// <summary>
+        /// Combines the four specified hash codes.
+        /// </summary>
+        /// <param name="h1">The first </param>
+        /// <param name="h2">Hash code two</param>
+        /// <param name="h3">Hash code three</param>
+        /// <param name="h4">Hash code four</param>
+        /// <returns>Returns a hash code for the provided hash codes.</returns>
+        public static int Combine(int h1, int h2, int h3, int h4)
+        {
+            int hash = Combine(h1, h2);
+
+            hash = Combine(hash, h3);
+
+            return Combine(hash, h4);
+        }
     }
 }

src/SixLabors.Core/MathF.cs

@@ -3,7 +3,7 @@
 
 using System.Runtime.CompilerServices;
 
-#if NETCOREAPP2_0
+#if SUPPORTS_MATHF
 [assembly: TypeForwardedTo(typeof(System.MathF))]
 #else
 namespace System

src/SixLabors.Core/Memory/ArrayPoolMemoryAllocator.Buffer{T}.cs

@@ -51,7 +51,7 @@ namespace SixLabors.Memory
             /// <inheritdoc />
             protected override void Dispose(bool disposing)
             {
-                if (!disposing || this.Data == null || this.sourcePoolReference == null)
+                if (!disposing || this.Data is null || this.sourcePoolReference is null)
                 {
                     return;
                 }
@@ -71,7 +71,7 @@ namespace SixLabors.Memory
         /// <summary>
         /// The <see cref="IManagedByteBuffer"/> implementation of <see cref="ArrayPoolMemoryAllocator"/>.
         /// </summary>
-        private class ManagedByteBuffer : Buffer<byte>, IManagedByteBuffer
+        private sealed class ManagedByteBuffer : Buffer<byte>, IManagedByteBuffer
         {
             public ManagedByteBuffer(byte[] data, int length, ArrayPool<byte> sourcePool)
                 : base(data, length, sourcePool)

src/SixLabors.Core/Primitives/Point.cs

@@ -258,25 +258,20 @@ namespace SixLabors.Primitives
         public void Offset(Point point) => this.Offset(point.X, point.Y);
 
         /// <inheritdoc/>
-        public override int GetHashCode() => this.GetHashCode(this);
+        public override int GetHashCode() => HashHelpers.Combine(this.X.GetHashCode(), this.Y.GetHashCode());
 
         /// <inheritdoc/>
-        public override string ToString()
+        public override string ToString() => $"Point [ X={this.X}, Y={this.Y} ]";
-        {
-            return $"Point [ X={this.X}, Y={this.Y} ]";
-        }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj) => obj is Point && this.Equals((Point)obj);
+        public override bool Equals(object obj) => obj is Point other && this.Equals(other);
 
         /// <inheritdoc/>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public bool Equals(Point other) => this.X == other.X && this.Y == other.Y;
+        public bool Equals(Point other) => this.X.Equals(other.X) && this.Y.Equals(other.Y);
 
         private static short HighInt16(int n) => unchecked((short)((n >> 16) & 0xffff));
 
         private static short LowInt16(int n) => unchecked((short)(n & 0xffff));
-
-        private int GetHashCode(Point point) => HashHelpers.Combine(point.X.GetHashCode(), point.Y.GetHashCode());
     }
 }

src/SixLabors.Core/Primitives/PointF.cs

@@ -267,30 +267,19 @@ namespace SixLabors.Primitives
         public void Offset(PointF point) => this.Offset(point.X, point.Y);
 
         /// <inheritdoc/>
-        public override int GetHashCode() => this.GetHashCode(this);
+        public override int GetHashCode()
-
-        /// <inheritdoc/>
-        public override string ToString()
         {
-            return $"PointF [ X={this.X}, Y={this.Y} ]";
+            return HashHelpers.Combine(this.X.GetHashCode(), this.Y.GetHashCode());
         }
 
+        /// <inheritdoc/>
+        public override string ToString() => $"PointF [ X={this.X}, Y={this.Y} ]";
+
         /// <inheritdoc/>
         public override bool Equals(object obj) => obj is PointF && this.Equals((PointF)obj);
 
         /// <inheritdoc/>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public bool Equals(PointF other) => this.X.Equals(other.X) && this.Y.Equals(other.Y);
-
-        /// <summary>
-        /// Returns the hash code for this instance.
-        /// </summary>
-        /// <param name="point">
-        /// The instance of <see cref="PointF"/> to return the hash code for.
-        /// </param>
-        /// <returns>
-        /// A 32-bit signed integer that is the hash code for this instance.
-        /// </returns>
-        private int GetHashCode(PointF point) => HashHelpers.Combine(point.X.GetHashCode(), point.Y.GetHashCode());
     }
 }

src/SixLabors.Core/Primitives/Rectangle.cs

@@ -117,14 +117,7 @@ namespace SixLabors.Primitives
         /// <summary>
         /// Gets the y-coordinate of the top edge of this <see cref="Rectangle"/>.
         /// </summary>
-        public int Top
+        public int Top => this.Y;
-        {
-            [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get
-            {
-                return this.Y;
-            }
-        }
 
         /// <summary>
         /// Gets the x-coordinate of the right edge of this <see cref="Rectangle"/>.
@@ -132,10 +125,7 @@ namespace SixLabors.Primitives
         public int Right
         {
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get
+            get => unchecked(this.X + this.Width);
-            {
-                return unchecked(this.X + this.Width);
-            }
         }
 
         /// <summary>
@@ -144,23 +134,14 @@ namespace SixLabors.Primitives
         public int Bottom
         {
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get
+            get => unchecked(this.Y + this.Height);
-            {
+
-                return unchecked(this.Y + this.Height);
-            }
         }
 
         /// <summary>
         /// Gets the x-coordinate of the left edge of this <see cref="Rectangle"/>.
         /// </summary>
-        public int Left
+        public int Left => this.X;
-        {
-            [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get
-            {
-                return this.X;
-            }
-        }
 
         /// <summary>
         /// Creates a <see cref="RectangleF"/> with the coordinates of the specified <see cref="Rectangle"/>.
@@ -443,7 +424,14 @@ namespace SixLabors.Primitives
         }
 
         /// <inheritdoc/>
-        public override int GetHashCode() => this.GetHashCode(this);
+        public override int GetHashCode()
+        {
+            return HashHelpers.Combine(
+               this.X.GetHashCode(),
+               this.Y.GetHashCode(),
+               this.Width.GetHashCode(),
+               this.Height.GetHashCode());
+        }
 
         /// <inheritdoc/>
         public override string ToString()
@@ -452,19 +440,14 @@ namespace SixLabors.Primitives
         }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj) => obj is Rectangle && this.Equals((Rectangle)obj);
+        public override bool Equals(object obj) => obj is Rectangle other && this.Equals(other);
 
         /// <inheritdoc/>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public bool Equals(Rectangle other) => this.X == other.X && this.Y == other.Y && this.Width == other.Width && this.Height == other.Height;
+        public bool Equals(Rectangle other) =>
-
+            this.X.Equals(other.X) &&
-        private int GetHashCode(Rectangle rectangle)
+            this.Y.Equals(other.Y) &&
-        {
+            this.Width.Equals(other.Width) &&
-            int hashCode = rectangle.X.GetHashCode();
+            this.Height.Equals(other.Height);
-            hashCode = HashHelpers.Combine(hashCode, rectangle.Y.GetHashCode());
-            hashCode = HashHelpers.Combine(hashCode, rectangle.Width.GetHashCode());
-            hashCode = HashHelpers.Combine(hashCode, rectangle.Height.GetHashCode());
-            return hashCode;
-        }
     }
 }

src/SixLabors.Core/Primitives/RectangleF.cs

@@ -117,14 +117,7 @@ namespace SixLabors.Primitives
         /// <summary>
         /// Gets the y-coordinate of the top edge of this <see cref="RectangleF"/>.
         /// </summary>
-        public float Top
+        public float Top => this.Y;
-        {
-            [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get
-            {
-                return this.Y;
-            }
-        }
 
         /// <summary>
         /// Gets the x-coordinate of the right edge of this <see cref="RectangleF"/>.
@@ -132,10 +125,7 @@ namespace SixLabors.Primitives
         public float Right
         {
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get
+            get => this.X + this.Width;
-            {
-                return this.X + this.Width;
-            }
         }
 
         /// <summary>
@@ -144,23 +134,13 @@ namespace SixLabors.Primitives
         public float Bottom
         {
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get
+            get => this.Y + this.Height;
-            {
-                return this.Y + this.Height;
-            }
         }
 
         /// <summary>
         /// Gets the x-coordinate of the left edge of this <see cref="RectangleF"/>.
         /// </summary>
-        public float Left
+        public float Left => this.X;
-        {
-            [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get
-            {
-                return this.X;
-            }
-        }
 
         /// <summary>
         /// Creates a <see cref="Rectangle"/> with the coordinates of the specified <see cref="RectangleF"/> by truncating each coordinate.
@@ -376,7 +356,14 @@ namespace SixLabors.Primitives
         }
 
         /// <inheritdoc/>
-        public override int GetHashCode() => this.GetHashCode(this);
+        public override int GetHashCode()
+        {
+            return HashHelpers.Combine(
+               this.X.GetHashCode(),
+               this.Y.GetHashCode(),
+               this.Width.GetHashCode(),
+               this.Height.GetHashCode());
+        }
 
         /// <inheritdoc/>
         public override string ToString()
@@ -385,19 +372,14 @@ namespace SixLabors.Primitives
         }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj) => obj is RectangleF && this.Equals((RectangleF)obj);
+        public override bool Equals(object obj) => obj is RectangleF other && this.Equals(other);
 
         /// <inheritdoc/>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public bool Equals(RectangleF other) => this.X.Equals(other.X) && this.Y.Equals(other.Y) && this.Width.Equals(other.Width) && this.Height.Equals(other.Height);
+        public bool Equals(RectangleF other) =>
-
+            this.X.Equals(other.X) &&
-        private int GetHashCode(RectangleF rectangle)
+            this.Y.Equals(other.Y) &&
-        {
+            this.Width.Equals(other.Width) &&
-            int hashCode = rectangle.X.GetHashCode();
+            this.Height.Equals(other.Height);
-            hashCode = HashHelpers.Combine(hashCode, rectangle.Y.GetHashCode());
-            hashCode = HashHelpers.Combine(hashCode, rectangle.Width.GetHashCode());
-            hashCode = HashHelpers.Combine(hashCode, rectangle.Height.GetHashCode());
-            return hashCode;
-        }
     }
 }

src/SixLabors.Core/Primitives/Size.cs

@@ -252,20 +252,17 @@ namespace SixLabors.Primitives
         public static Size Truncate(SizeF size) => new Size(unchecked((int)size.Width), unchecked((int)size.Height));
 
         /// <inheritdoc/>
-        public override int GetHashCode() => this.GetHashCode(this);
+        public override int GetHashCode() => HashHelpers.Combine(this.Width.GetHashCode(), this.Height.GetHashCode());
 
         /// <inheritdoc/>
-        public override string ToString()
+        public override string ToString() => $"Size [ Width={this.Width}, Height={this.Height} ]";
-        {
-            return $"Size [ Width={this.Width}, Height={this.Height} ]";
-        }
 
         /// <inheritdoc/>
-        public override bool Equals(object obj) => obj is Size && this.Equals((Size)obj);
+        public override bool Equals(object obj) => obj is Size other && this.Equals(other);
 
         /// <inheritdoc/>
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public bool Equals(Size other) => this.Width == other.Width && this.Height == other.Height;
+        public bool Equals(Size other) => this.Width.Equals(other.Width) && this.Height.Equals(other.Height);
 
         /// <summary>
         /// Multiplies <see cref="Size"/> by an <see cref="int"/> producing <see cref="Size"/>.
@@ -284,16 +281,5 @@ namespace SixLabors.Primitives
         /// <returns>Product of type SizeF.</returns>
         private static SizeF Multiply(Size size, float multiplier) =>
             new SizeF(size.Width * multiplier, size.Height * multiplier);
-
-        /// <summary>
-        /// Returns the hash code for this instance.
-        /// </summary>
-        /// <param name="size">
-        /// The instance of <see cref="Size"/> to return the hash code for.
-        /// </param>
-        /// <returns>
-        /// A 32-bit signed integer that is the hash code for this instance.
-        /// </returns>
-        private int GetHashCode(Size size) => HashHelpers.Combine(size.Width.GetHashCode(), size.Height.GetHashCode());
     }
 }

src/SixLabors.Core/Primitives/SizeF.cs

@@ -200,14 +200,11 @@ namespace SixLabors.Primitives
         /// <inheritdoc/>
         public override int GetHashCode()
         {
-            return this.GetHashCode(this);
+            return HashHelpers.Combine(this.Width.GetHashCode(), this.Height.GetHashCode());
         }
 
         /// <inheritdoc/>
-        public override string ToString()
+        public override string ToString() => $"SizeF [ Width={this.Width}, Height={this.Height} ]";
-        {
-            return $"SizeF [ Width={this.Width}, Height={this.Height} ]";
-        }
 
         /// <inheritdoc/>
         public override bool Equals(object obj) => obj is SizeF && this.Equals((SizeF)obj);
@@ -224,7 +221,5 @@ namespace SixLabors.Primitives
         /// <returns>Product of type SizeF.</returns>
         private static SizeF Multiply(SizeF size, float multiplier) =>
             new SizeF(size.Width * multiplier, size.Height * multiplier);
-
-        private int GetHashCode(SizeF size) => HashHelpers.Combine(size.Width.GetHashCode(), size.Height.GetHashCode());
     }
 }

src/SixLabors.Core/Properties/AssemblyInfo.cs

@@ -1,37 +1,8 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
-using System.Reflection;
-using System.Resources;
 using System.Runtime.CompilerServices;
 
-// General Information about an assembly is controlled through the following
-// set of attributes. Change these attribute values to modify the information
-// associated with an assembly.
-[assembly: AssemblyTitle("SixLabors.Core")]
-[assembly: AssemblyDescription("")]
-[assembly: AssemblyConfiguration("")]
-[assembly: AssemblyCompany("Six Labors")]
-[assembly: AssemblyProduct("SixLabors.Core")]
-[assembly: AssemblyCopyright("Copyright (c) Six Labors and contributors.")]
-[assembly: AssemblyTrademark("")]
-[assembly: AssemblyCulture("")]
-[assembly: NeutralResourcesLanguage("en")]
-
-// Version information for an assembly consists of the following four values:
-//
-//      Major Version
-//      Minor Version
-//      Build Number
-//      Revision
-//
-// You can specify all the values or you can default the Build and Revision Numbers
-// by using the '*' as shown below:
-// [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("0.1.0")]
-[assembly: AssemblyFileVersion("0.1.0")]
-[assembly: AssemblyInformationalVersion("0.1.0-alpha02")]
-
 // Ensure the internals can be tested.
 [assembly: InternalsVisibleTo("SixLabors.Core.Tests")]
 

src/SixLabors.Core/SixLabors.Core.csproj

@@ -5,7 +5,7 @@
         <VersionPrefix Condition="$(packageversion) != ''">$(packageversion)</VersionPrefix>
         <VersionPrefix Condition="$(packageversion) == ''">0.1.0-alpha2</VersionPrefix>
         <Authors>Six Labors</Authors>
-        <TargetFrameworks>netstandard1.1;netcoreapp2.0;</TargetFrameworks>
+        <TargetFrameworks>netstandard1.1;netcoreapp2.0;netcoreapp2.1;</TargetFrameworks>
         <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
         <GenerateDocumentationFile>true</GenerateDocumentationFile>
         <AssemblyName>SixLabors.Core</AssemblyName>
@@ -16,16 +16,7 @@
         <PackageLicenseUrl>http://www.apache.org/licenses/LICENSE-2.0</PackageLicenseUrl>
         <RepositoryType>git</RepositoryType>
         <RepositoryUrl>https://github.com/SixLabors/Core</RepositoryUrl>
-        <GenerateAssemblyDescriptionAttribute>false</GenerateAssemblyDescriptionAttribute>
+        <Copyright>Copyright (c) Six Labors and contributors.</Copyright>
-        <GenerateAssemblyConfigurationAttribute>false</GenerateAssemblyConfigurationAttribute>
-        <GenerateAssemblyCompanyAttribute>false</GenerateAssemblyCompanyAttribute>
-        <GenerateAssemblyProductAttribute>false</GenerateAssemblyProductAttribute>
-        <GenerateAssemblyCopyrightAttribute>false</GenerateAssemblyCopyrightAttribute>
-        <GenerateNeutralResourcesLanguageAttribute>false</GenerateNeutralResourcesLanguageAttribute>
-        <GenerateAssemblyVersionAttribute>false</GenerateAssemblyVersionAttribute>
-        <GenerateAssemblyFileVersionAttribute>false</GenerateAssemblyFileVersionAttribute>
-        <GenerateAssemblyInformationalVersionAttribute>false</GenerateAssemblyInformationalVersionAttribute>
-        <GenerateAssemblyTitleAttribute>false</GenerateAssemblyTitleAttribute>
         <DebugType Condition="$(codecov) == 'true'">full</DebugType>
         <RootNamespace>SixLabors</RootNamespace>
     </PropertyGroup>
@@ -34,19 +25,28 @@
         <CodeAnalysisRuleSet>..\SixLabors.ruleset</CodeAnalysisRuleSet>
     </PropertyGroup>
 
-    <ItemGroup>
+    <PropertyGroup Condition=" $(TargetFramework.StartsWith('netcoreapp2')) ">
-        <AdditionalFiles Include="..\..\stylecop.json" />
+      <DefineConstants>$(DefineConstants);SUPPORTS_MATHF</DefineConstants>
-    </ItemGroup>
+    </PropertyGroup>
         
     <ItemGroup>
        <PackageReference Include="StyleCop.Analyzers" Version="1.1.0-beta004">
         <PrivateAssets>All</PrivateAssets>
       </PackageReference>
+    
+        <AdditionalFiles Include="..\..\stylecop.json" />
+    </ItemGroup>
+ 
+    <ItemGroup>
+       <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.1" />
+    </ItemGroup>  
+
+    <ItemGroup Condition=" '$(TargetFramework)' != 'netcoreapp2.1' ">
         <PackageReference Include="System.Buffers" Version="4.5.0" />
         <PackageReference Include="System.Memory" Version="4.5.1" />
-        <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="4.5.1" />
     </ItemGroup>
+  
     <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.1' ">
-        <PackageReference Include="System.Numerics.Vectors" Version="4.4.0" />
+        <PackageReference Include="System.Numerics.Vectors" Version="4.5.0" />
     </ItemGroup>
 </Project>

tests/CodeCoverage/CodeCoverage.cmd

@@ -10,7 +10,7 @@ cd ..
 dotnet restore SixLabors.Core.sln
 dotnet build SixLabors.Core.sln --no-incremental -c release /p:codecov=true
 
-tests\CodeCoverage\OpenCover.4.6.519\tools\OpenCover.Console.exe -target:"dotnet.exe" -targetargs:"test tests\SixLabors.Core.Tests\SixLabors.Core.Tests.csproj --no-build -c release" -searchdirs:"tests\SixLabors.Core.Tests\bin\Release\netcoreapp1.1" -register:user -output:.\SixLabors.Core.Coverage.xml -hideskipped:All -returntargetcode -oldStyle -filter:"+[SixLabors.*]*" 
+tests\CodeCoverage\OpenCover.4.6.519\tools\OpenCover.Console.exe -target:"dotnet.exe" -targetargs:"test tests\SixLabors.Core.Tests\SixLabors.Core.Tests.csproj --no-build -c release" -searchdirs:"tests\SixLabors.Core.Tests\bin\Release\netcoreapp2.1" -register:user -output:.\SixLabors.Core.Coverage.xml -hideskipped:All -returntargetcode -oldStyle -filter:"+[SixLabors.*]*" 
 
 if %errorlevel% neq 0 exit /b %errorlevel%
 

tests/SixLabors.Core.Tests/Helpers/DebugGuardTests.cs

@@ -5,7 +5,6 @@
 #define DEBUG
 
 using System;
-using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
 using System.Reflection;
@@ -100,7 +99,7 @@ namespace SixLabors.Helpers.Tests
             });
 
             Assert.Equal("myParamName", exception.ParamName);
-            Assert.True(exception.Message.Contains($"Value must be greater than {min}."));
+            Assert.Contains($"Value must be greater than {min}.", exception.Message);
         }
 
         [Theory]
@@ -120,43 +119,7 @@ namespace SixLabors.Helpers.Tests
             });
 
             Assert.Equal("myParamName", exception.ParamName);
-            Assert.True(exception.Message.Contains($"Value must be greater than or equal to 2."));
+            Assert.Contains($"Value must be greater than or equal to 2.", exception.Message);
-        }
-
-        [Fact]
-        public void IsTrue_IsTrue_ThrowsNoException()
-        {
-            DebugGuard.IsTrue(true, "myParamName", "myTestMessage");
-        }
-
-        [Fact]
-        public void IsTrue_IsFalse_ThrowsException()
-        {
-            var exception = Assert.Throws<ArgumentException>(() =>
-            {
-                DebugGuard.IsTrue(false, "myParamName", "myTestMessage");
-            });
-
-            Assert.Equal("myParamName", exception.ParamName);
-            Assert.True(exception.Message.Contains("myTestMessage"));
-        }
-
-        [Fact]
-        public void IsFalse_IsFalse_ThrowsNoException()
-        {
-            DebugGuard.IsFalse(false, "myParamName", "myTestMessage");
-        }
-
-        [Fact]
-        public void IsFalse_IsTrue_ThrowsException()
-        {
-            var exception = Assert.Throws<ArgumentException>(() =>
-            {
-                DebugGuard.IsFalse(true, "myParamName", "myTestMessage");
-            });
-
-            Assert.Equal("myParamName", exception.ParamName);
-            Assert.True(exception.Message.Contains("myTestMessage"));
         }
 
         [Theory]

tests/SixLabors.Core.Tests/Helpers/GuardTests.cs

@@ -2,128 +2,12 @@
 // Licensed under the Apache License, Version 2.0.
 
 using System;
-using System.Collections.Generic;
-using System.Linq;
 using Xunit;
 
 namespace SixLabors.Helpers.Tests
 {
     public class GuardTests
     {
-        [Fact]
-        public void NotNull_TargetNotNull_ThrowsNoException()
-        {
-            Guard.NotNull("test", "myParamName");
-        }
-
-        [Fact]
-        public void NotNull_TargetNull_ThrowsException()
-        {
-            Assert.Throws<ArgumentNullException>(() =>
-            {
-                Guard.NotNull((object)null, "myParamName");
-            });
-        }
-
-        [Fact]
-        public void NotNull_TargetNullWithMessage_ThrowsException()
-        {
-            var exception = Assert.Throws<ArgumentNullException>(() =>
-            {
-                Guard.NotNull((object)null, "myParamName", "myTestMessage");
-            });
-
-            Assert.Equal("myParamName", exception.ParamName);
-            Assert.True(exception.Message.Contains("myTestMessage"));
-        }
-
-        [Fact]
-        public void NotNullOrEmpty_TargetNotNullOrEmpty_ThrowsNoException()
-        {
-            Guard.NotNullOrEmpty("test", "myParamName");
-        }
-
-        [Fact]
-        public void NotNullOrEmpty_TargetNull_ThrowsException()
-        {
-            Assert.Throws<ArgumentNullException>(() =>
-            {
-                Guard.NotNullOrEmpty(null, "myParamName");
-            });
-        }
-
-        [Fact]
-        public void NotNullOrEmpty_TargetWhitespace_ThrowsException()
-        {
-            Assert.Throws<ArgumentException>(() =>
-            {
-                Guard.NotNullOrEmpty("\n\n", "myParamName");
-            });
-        }
-
-        [Fact]
-        public void NotNullOrEmpty_TargetEmpty_ThrowsException()
-        {
-            var exception = Assert.Throws<ArgumentException>(() =>
-            {
-                Guard.NotNullOrEmpty(string.Empty, "myParamName");
-            });
-
-            Assert.Equal("myParamName", exception.ParamName);
-            Assert.True(exception.Message.Contains("Value cannot be null, empty, or cannot contain only whitespace."));
-        }
-
-        [Fact]
-        public void NotNullOrEmpty_TargetEmptyWithMessage_ThrowsException()
-        {
-            var exception = Assert.Throws<ArgumentException>(() =>
-            {
-                Guard.NotNullOrEmpty(string.Empty, "myParamName", "myTestMessage");
-            });
-
-            Assert.Equal("myParamName", exception.ParamName);
-            Assert.True(exception.Message.Contains("myTestMessage"));
-        }
-
-        [Fact]
-        public void NotNullOrEmptyIEnumerable_TargetNotNullOrEmpty_ThrowsNoException()
-        {
-            Guard.NotNullOrEmpty(new string[] { "test" }, "myParamName");
-        }
-
-        [Fact]
-        public void NotNullOrEmptyIEnumerable_TargetNull_ThrowsException()
-        {
-            Assert.Throws<ArgumentNullException>(() =>
-            {
-                Guard.NotNullOrEmpty((IEnumerable<string>)null, "myParamName");
-            });
-        }
-
-        [Fact]
-        public void NotNullOrEmptyIEnumerable_TargetEmpty_ThrowsException()
-        {
-            var exception = Assert.Throws<ArgumentException>(() =>
-            {
-                Guard.NotNullOrEmpty(new string[] { }, "myParamName");
-            });
-
-            Assert.Equal("myParamName", exception.ParamName);
-            Assert.True(exception.Message.Contains("Value cannot be empty."));
-        }
-
-        [Fact]
-        public void NotNullOrEmptyIEnumerable_TargetEmptyWithMessage_ThrowsException()
-        {
-            var exception = Assert.Throws<ArgumentException>(() =>
-            {
-                Guard.NotNullOrEmpty(new string[] { }, "myParamName", "myTestMessage");
-            });
-
-            Assert.Equal("myParamName", exception.ParamName);
-            Assert.True(exception.Message.Contains("myTestMessage"));
-        }
-
         [Fact]
         public void MustBeLessThan_IsLess_ThrowsNoException()
         {
@@ -181,7 +65,7 @@ namespace SixLabors.Helpers.Tests
             });
 
             Assert.Equal("myParamName", exception.ParamName);
-            Assert.True(exception.Message.Contains($"Value must be greater than {min}."));
+            Assert.Contains($"Value must be greater than {min}.", exception.Message);
         }
 
         [Theory]
@@ -224,43 +108,7 @@ namespace SixLabors.Helpers.Tests
             });
 
             Assert.Equal("myParamName", exception.ParamName);
-            Assert.True(exception.Message.Contains($"Value must be greater than or equal to {min} and less than or equal to {max}."));
+            Assert.Contains($"Value must be greater than or equal to {min} and less than or equal to {max}.", exception.Message);
-        }
-
-        [Fact]
-        public void IsTrue_IsTrue_ThrowsNoException()
-        {
-            Guard.IsTrue(true, "myParamName", "myTestMessage");
-        }
-
-        [Fact]
-        public void IsTrue_IsFalse_ThrowsException()
-        {
-            var exception = Assert.Throws<ArgumentException>(() =>
-            {
-                Guard.IsTrue(false, "myParamName", "myTestMessage");
-            });
-
-            Assert.Equal("myParamName", exception.ParamName);
-            Assert.True(exception.Message.Contains("myTestMessage"));
-        }
-
-        [Fact]
-        public void IsFalse_IsFalse_ThrowsNoException()
-        {
-            Guard.IsFalse(false, "myParamName", "myTestMessage");
-        }
-
-        [Fact]
-        public void IsFalse_IsTrue_ThrowsException()
-        {
-            var exception = Assert.Throws<ArgumentException>(() =>
-            {
-                Guard.IsFalse(true, "myParamName", "myTestMessage");
-            });
-
-            Assert.Equal("myParamName", exception.ParamName);
-            Assert.True(exception.Message.Contains("myTestMessage"));
         }
 
         [Theory]
@@ -280,7 +128,7 @@ namespace SixLabors.Helpers.Tests
             });
 
             Assert.Equal("myParamName", exception.ParamName);
-            Assert.True(exception.Message.Contains($"The size must be at least 3."));
+            Assert.Contains("The size must be at least 3.", exception.Message);
         }
     }
 }

tests/SixLabors.Core.Tests/Helpers/HashHelpersTests.cs

@@ -0,0 +1,28 @@
+// Copyright (c) Six Labors and contributors.
+// Licensed under the Apache License, Version 2.0.
+
+using Xunit;
+
+namespace SixLabors.Tests.Helpers
+{
+    public class HashHelpersTests
+    {
+        [Fact]
+        public void CanCombineTwoValues()
+        {
+            Assert.Equal(35, HashHelpers.Combine(1, 2));
+        }
+
+        [Fact]
+        public void CanCombineThreeValues()
+        {
+            Assert.Equal(1152, HashHelpers.Combine(1, 2, 3));
+        }
+
+        [Fact]
+        public void CanCombineFourValues()
+        {
+            Assert.Equal(38020, HashHelpers.Combine(1, 2, 3, 4));
+        }
+    }
+}

tests/SixLabors.Core.Tests/Helpers/MathFTests.cs

@@ -6,6 +6,7 @@ using Xunit;
 
 namespace SixLabors.Tests.Helpers
 {
+
     public class MathFTests
     {
         [Fact]

tests/SixLabors.Core.Tests/Memory/ArrayPoolMemoryManagerTests.cs

@@ -80,7 +80,6 @@ namespace SixLabors.Memory.Tests
             Assert.True(this.CheckIsRentingPooledBuffer<byte>(size));
         }
 
-
         [Theory]
         [InlineData(128 * 1024 * 1024)]
         [InlineData(MaxPooledBufferSizeInBytes + 1)]

tests/SixLabors.Core.Tests/Primitives/PointFTests.cs

@@ -5,12 +5,24 @@ using System;
 using System.Globalization;
 using System.Numerics;
 using System.Reflection;
+using System.Runtime.CompilerServices;
 using Xunit;
 
 namespace SixLabors.Primitives.Tests
 {
     public class PointFTests
     {
+        [Fact]
+        public void CanReinterpretCastFromVector2()
+        {
+            var vector = new Vector2(1, 2);
+
+            PointF point = Unsafe.As<Vector2, PointF>(ref vector);
+
+            Assert.Equal(vector.X, point.X);
+            Assert.Equal(vector.Y, point.Y);
+        }
+
         [Fact]
         public void DefaultConstructorTest()
         {

tests/SixLabors.Core.Tests/SixLabors.Core.Tests.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <VersionPrefix>0.0.0</VersionPrefix>
-    <TargetFrameworks>netcoreapp1.1;netcoreapp2.0;</TargetFrameworks>
+    <TargetFrameworks>netcoreapp1.1;netcoreapp2.1;</TargetFrameworks>
     <AssemblyName>SixLabors.Core.Tests</AssemblyName>
     <PackageId>SixLabors.Shapes.Tests</PackageId>
     <GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
@@ -28,18 +28,14 @@
 
   <ItemGroup>
     <PackageReference Include="StyleCop.Analyzers" Version="1.1.0-beta004" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.8.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.2.0" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0" />
-    <PackageReference Include="xunit" Version="2.2.0" />
+    <PackageReference Include="xunit" Version="2.4.0" />
-    <PackageReference Include="Moq" Version="4.7.1" />
+    <PackageReference Include="Moq" Version="4.9.0" />
   </ItemGroup>
 
   <ItemGroup>
     <ProjectReference Include="..\..\src\SixLabors.Core\SixLabors.Core.csproj" />
   </ItemGroup>
 
-  <ItemGroup>
-    <Service Include="{82a7f48d-3b50-4b1e-b82e-3ada8210c358}" />
-  </ItemGroup>
-
 </Project>