Implement NGC service (#5681)

* Implement NGC service

* Use raw byte arrays instead of string for _wordSeparators

* Silence IDE0230 for _wordSeparators

* Try to silence warning about _rangeValuesCount not being read on SparseSet

* Make AcType enum private

* Add abstract methods and one TODO that I forgot

* PR feedback

* More PR feedback

* More PR feedback

src/Ryujinx.Horizon/Ngc/Ipc/Service.cs

@@ -0,0 +1,64 @@
+using Ryujinx.Horizon.Common;
+using Ryujinx.Horizon.Sdk.Ngc;
+using Ryujinx.Horizon.Sdk.Ngc.Detail;
+using Ryujinx.Horizon.Sdk.Sf;
+using Ryujinx.Horizon.Sdk.Sf.Hipc;
+using System;
+
+namespace Ryujinx.Horizon.Ngc.Ipc
+{
+    partial class Service : INgcService
+    {
+        private readonly ProfanityFilter _profanityFilter;
+
+        public Service(ProfanityFilter profanityFilter)
+        {
+            _profanityFilter = profanityFilter;
+        }
+
+        [CmifCommand(0)]
+        public Result GetContentVersion(out uint version)
+        {
+            lock (_profanityFilter)
+            {
+                return _profanityFilter.GetContentVersion(out version);
+            }
+        }
+
+        [CmifCommand(1)]
+        public Result Check(out uint checkMask, ReadOnlySpan<byte> text, uint regionMask, ProfanityFilterOption option)
+        {
+            lock (_profanityFilter)
+            {
+                return _profanityFilter.CheckProfanityWords(out checkMask, text, regionMask, option);
+            }
+        }
+
+        [CmifCommand(2)]
+        public Result Mask(
+            out int maskedWordsCount,
+            [Buffer(HipcBufferFlags.Out | HipcBufferFlags.MapAlias)] Span<byte> filteredText,
+            [Buffer(HipcBufferFlags.In | HipcBufferFlags.MapAlias)] ReadOnlySpan<byte> text,
+            uint regionMask,
+            ProfanityFilterOption option)
+        {
+            lock (_profanityFilter)
+            {
+                int length = Math.Min(filteredText.Length, text.Length);
+
+                text[..length].CopyTo(filteredText[..length]);
+
+                return _profanityFilter.MaskProfanityWordsInText(out maskedWordsCount, filteredText, regionMask, option);
+            }
+        }
+
+        [CmifCommand(3)]
+        public Result Reload()
+        {
+            lock (_profanityFilter)
+            {
+                return _profanityFilter.Reload();
+            }
+        }
+    }
+}