Removes .NET Core 2.1 (#79)

* Removed .NET Core 2.1

* Rearranged some files

* Dropped .NET Core 2.1 from test-project and rearranged some files

.azure/pipelines/jobs/build_and_test.yml

@@ -20,11 +20,6 @@ jobs:
           version: $(SDK_VERSION)
           includePreviewVersions: true
 
-      - task: UseDotNet@2
-        displayName: 'Use dotnet sdk 2.1'
-        inputs:
-          version: 2.1.x
-
       - bash: |
           export PATH="$(pwd)/dotnet:$PATH"
           echo 'installed sdks:'

Directory.Build.props

@@ -16,7 +16,7 @@
 
     <PropertyGroup>
         <LangVersion>latest</LangVersion>
-        <StandardTfms>netcoreapp3.0;netcoreapp2.1;netstandard2.0</StandardTfms>
+        <StandardTfms>netcoreapp3.0;netstandard2.0</StandardTfms>
     </PropertyGroup>
 
     <PropertyGroup>

README.md

@@ -10,21 +10,16 @@ Decoding can read from buffers of type `byte` (for UTF-8) or `char`.
 
 Encoding / decoding supports buffer-chains, for example for very large data or when the data arrives in chunks.
 
-In .NET Core 2.1+ encoding / decoding is done with SIMD-support:
+In .NET Core 3.0 onwards encoding / decoding is done with SIMD-support:
 
 | Framework | scalar | SSSE3 | AVX2 |
 | -- | -- | -- | -- |
 | .NET Core 3.0 | :heavy_check_mark: | :heavy_check_mark: | :heavy_check_mark: |
-| .NET Core 2.1+ | :heavy_check_mark: | :heavy_check_mark: | :x: |
 | .NET Standard 2.0 | :heavy_check_mark: | :x: | :x: |
 
 If available AVX will "eat" up as much as possible, then SSE will "eat" up as much as possible,
 finally scalar code processes the rest (including padding).
 
-**Note:** SIMD-support (with HW-intrinsics) is officially supported for .NET Core 3.0 onwards.
-Hence SIMD-support for .NET Core 2.1+ is not official, and based on an experimental (but tested) solution.
-Further note that future versions of the JIT may not compile these bits anymore. So use this library with caution in a .NET Core 2.1+ project.
-
 ## Usage
 
 Basically the entry to encoder / decoder is `Base64.Default` for _base64_, and `Base64.Url` for _base64Url_.

source/gfoidl.Base64/.editorconfig

@@ -0,0 +1,4 @@
+[*.cs]
+
+# PUB0001: Pubternal type in public API
+dotnet_diagnostic.PUB0001.severity = suggestion

source/gfoidl.Base64/Internal/Base64Encoder/Base64Encoder.Decode.netcoreapp3.0.cs → source/gfoidl.Base64/Internal/Base64Encoder/Base64Encoder.Decode.netcoreapp.cs

@@ -339,31 +339,31 @@ private static void Ssse3Decode<T>(ref T src, ref byte destBytes, int sourceLeng
             destBytes = ref destStart;
         }
         //---------------------------------------------------------------------
-        private static ReadOnlySpan<sbyte> s_sseDecodeLutLo => new sbyte[]
+        private static ReadOnlySpan<sbyte> s_sseDecodeLutLo => new sbyte[16]
         {
             0x15, 0x11, 0x11, 0x11,
             0x11, 0x11, 0x11, 0x11,
             0x11, 0x11, 0x13, 0x1A,
             0x1B, 0x1B, 0x1B, 0x1A
         };
 
-        private static ReadOnlySpan<sbyte> s_sseDecodeLutHi => new sbyte[]
+        private static ReadOnlySpan<sbyte> s_sseDecodeLutHi => new sbyte[16]
         {
             0x10, 0x10, 0x01, 0x02,
             0x04, 0x08, 0x04, 0x08,
             0x10, 0x10, 0x10, 0x10,
             0x10, 0x10, 0x10, 0x10
         };
 
-        private static ReadOnlySpan<sbyte> s_sseDecodeLutShift => new sbyte[]
+        private static ReadOnlySpan<sbyte> s_sseDecodeLutShift => new sbyte[16]
         {
               0,  16,  19,   4,
             -65, -65, -71, -71,
               0,   0,   0,   0,
               0,   0,   0,   0
         };
 
-        private static ReadOnlySpan<sbyte> s_avxDecodeLutLo => new sbyte[]
+        private static ReadOnlySpan<sbyte> s_avxDecodeLutLo => new sbyte[32]
         {
             0x15, 0x11, 0x11, 0x11,
             0x11, 0x11, 0x11, 0x11,
@@ -375,7 +375,7 @@ private static void Ssse3Decode<T>(ref T src, ref byte destBytes, int sourceLeng
             0x1B, 0x1B, 0x1B, 0x1A
         };
 
-        private static ReadOnlySpan<sbyte> s_avxDecodeLutHi => new sbyte[]
+        private static ReadOnlySpan<sbyte> s_avxDecodeLutHi => new sbyte[32]
         {
             0x10, 0x10, 0x01, 0x02,
             0x04, 0x08, 0x04, 0x08,
@@ -387,7 +387,7 @@ private static void Ssse3Decode<T>(ref T src, ref byte destBytes, int sourceLeng
             0x10, 0x10, 0x10, 0x10
         };
 
-        private static ReadOnlySpan<sbyte> s_avxDecodeLutShift => new sbyte[]
+        private static ReadOnlySpan<sbyte> s_avxDecodeLutShift => new sbyte[32]
         {
              0,  16,  19,   4,
            -65, -65, -71, -71,