Strings should not be concatenated using '+' in a loop (#5664)

* Strings should not be concatenated using '+' in a loop

* fix IDE0090

* undo GenerateLoadOrStore

* prefer string interpolation

* Update src/Ryujinx.Graphics.Shader/CodeGen/Glsl/Instructions/InstGen.cs

Co-authored-by: Mary <thog@protonmail.com>

---------

Co-authored-by: Mary <thog@protonmail.com>

src/ARMeilleure/Diagnostics/Symbols.cs

@@ -1,6 +1,7 @@
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Text;
 
 namespace ARMeilleure.Diagnostics
 {
@@ -48,14 +49,15 @@ namespace ARMeilleure.Diagnostics
                         ulong diff = address - symbol.Start;
                         ulong rem = diff % symbol.ElementSize;
 
-                        result = symbol.Name + "_" + diff / symbol.ElementSize;
+                        StringBuilder resultBuilder = new();
+                        resultBuilder.Append($"{symbol.Name}_{diff / symbol.ElementSize}");
 
                         if (rem != 0)
                         {
-                            result += "+" + rem;
+                            resultBuilder.Append($"+{rem}");
                         }
 
-                        _symbols.TryAdd(address, result);
+                        _symbols.TryAdd(address, resultBuilder.ToString());
 
                         return result;
                     }

src/Ryujinx.Ava/UI/ViewModels/AmiiboWindowViewModel.cs

@@ -327,7 +327,7 @@ namespace Ryujinx.Ava.UI.ViewModels
 
             string imageUrl = _amiiboList.Find(amiibo => amiibo.Equals(selected)).Image;
 
-            string usageString = "";
+            StringBuilder usageStringBuilder = new();
 
             for (int i = 0; i < _amiiboList.Count; i++)
             {
@@ -341,20 +341,19 @@ namespace Ryujinx.Ava.UI.ViewModels
                         {
                             foreach (AmiiboApiUsage usageItem in item.AmiiboUsage)
                             {
-                                usageString += Environment.NewLine +
-                                               $"- {usageItem.Usage.Replace("/", Environment.NewLine + "-")}";
+                                usageStringBuilder.Append($"{Environment.NewLine}- {usageItem.Usage.Replace("/", Environment.NewLine + "-")}");
 
                                 writable = usageItem.Write;
                             }
                         }
                     }
 
-                    if (usageString.Length == 0)
+                    if (usageStringBuilder.Length == 0)
                     {
-                        usageString = LocaleManager.Instance[LocaleKeys.Unknown] + ".";
+                        usageStringBuilder.Append($"{LocaleManager.Instance[LocaleKeys.Unknown]}.");
                     }
 
-                    Usage = $"{LocaleManager.Instance[LocaleKeys.Usage]} {(writable ? $" ({LocaleManager.Instance[LocaleKeys.Writable]})" : "")} : {usageString}";
+                    Usage = $"{LocaleManager.Instance[LocaleKeys.Usage]} {(writable ? $" ({LocaleManager.Instance[LocaleKeys.Writable]})" : "")} : {usageStringBuilder}";
                 }
             }
 

src/Ryujinx.Graphics.Shader/CodeGen/Glsl/CodeGenContext.cs

@@ -92,14 +92,14 @@ namespace Ryujinx.Graphics.Shader.CodeGen.Glsl
 
         private static string GetIndentation(int level)
         {
-            string indentation = string.Empty;
+            StringBuilder indentationBuilder = new();
 
             for (int index = 0; index < level; index++)
             {
-                indentation += Tab;
+                indentationBuilder.Append(Tab);
             }
 
-            return indentation;
+            return indentationBuilder.ToString();
         }
     }
 }

src/Ryujinx.Graphics.Shader/CodeGen/Glsl/Instructions/InstGen.cs

@@ -2,6 +2,7 @@ using Ryujinx.Graphics.Shader.IntermediateRepresentation;
 using Ryujinx.Graphics.Shader.StructuredIr;
 using Ryujinx.Graphics.Shader.Translation;
 using System;
+using System.Text;
 
 using static Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions.InstGenBallot;
 using static Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions.InstGenCall;
@@ -67,11 +68,11 @@ namespace Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions
 
                 int arity = (int)(info.Type & InstType.ArityMask);
 
-                string args = string.Empty;
+                StringBuilder builder = new();
 
                 if (atomic && (operation.StorageKind == StorageKind.StorageBuffer || operation.StorageKind == StorageKind.SharedMemory))
                 {
-                    args = GenerateLoadOrStore(context, operation, isStore: false);
+                    builder.Append(GenerateLoadOrStore(context, operation, isStore: false));
 
                     AggregateType dstType = operation.Inst == Instruction.AtomicMaxS32 || operation.Inst == Instruction.AtomicMinS32
                         ? AggregateType.S32
@@ -79,7 +80,7 @@ namespace Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions
 
                     for (int argIndex = operation.SourcesCount - arity + 2; argIndex < operation.SourcesCount; argIndex++)
                     {
-                        args += ", " + GetSoureExpr(context, operation.GetSource(argIndex), dstType);
+                        builder.Append($", {GetSoureExpr(context, operation.GetSource(argIndex), dstType)}");
                     }
                 }
                 else
@@ -88,16 +89,16 @@ namespace Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions
                     {
                         if (argIndex != 0)
                         {
-                            args += ", ";
+                            builder.Append(", ");
                         }
 
                         AggregateType dstType = GetSrcVarType(inst, argIndex);
 
-                        args += GetSoureExpr(context, operation.GetSource(argIndex), dstType);
+                        builder.Append(GetSoureExpr(context, operation.GetSource(argIndex), dstType));
                     }
                 }
 
-                return info.OpName + '(' + args + ')';
+                return $"{info.OpName}({builder})";
             }
             else if ((info.Type & InstType.Op) != 0)
             {

src/Ryujinx.Graphics.Shader/CodeGen/Glsl/Instructions/InstGenMemory.cs

@@ -779,17 +779,18 @@ namespace Ryujinx.Graphics.Shader.CodeGen.Glsl.Instructions
 
         private static string GetMaskMultiDest(int mask)
         {
-            string swizzle = ".";
+            StringBuilder swizzleBuilder = new();
+            swizzleBuilder.Append('.');
 
             for (int i = 0; i < 4; i++)
             {
                 if ((mask & (1 << i)) != 0)
                 {
-                    swizzle += "xyzw"[i];
+                    swizzleBuilder.Append("xyzw"[i]);
                 }
             }
 
-            return swizzle;
+            return swizzleBuilder.ToString();
         }
     }
 }

src/Ryujinx.Graphics.Shader/Translation/Optimizations/GlobalToStorage.cs

@@ -2,6 +2,7 @@ using Ryujinx.Graphics.Shader.IntermediateRepresentation;
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Text;
 using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
 
 namespace Ryujinx.Graphics.Shader.Translation.Optimizations
@@ -785,30 +786,31 @@ namespace Ryujinx.Graphics.Shader.Translation.Optimizations
 
         private static string GetFunctionName(Operation baseOp, bool isMultiTarget, IReadOnlyList<uint> targetCbs)
         {
-            string name = baseOp.Inst.ToString();
+            StringBuilder nameBuilder = new();
+            nameBuilder.Append(baseOp.Inst.ToString());
 
-            name += baseOp.StorageKind switch
+            nameBuilder.Append(baseOp.StorageKind switch
             {
                 StorageKind.GlobalMemoryS8 => "S8",
                 StorageKind.GlobalMemoryS16 => "S16",
                 StorageKind.GlobalMemoryU8 => "U8",
                 StorageKind.GlobalMemoryU16 => "U16",
                 _ => string.Empty,
-            };
+            });
 
             if (isMultiTarget)
             {
-                name += "Multi";
+                nameBuilder.Append("Multi");
             }
 
             foreach (uint targetCb in targetCbs)
             {
                 (int sbCbSlot, int sbCbOffset) = UnpackCbSlotAndOffset(targetCb);
 
-                name += $"_c{sbCbSlot}o{sbCbOffset}";
+                nameBuilder.Append($"_c{sbCbSlot}o{sbCbOffset}");
             }
 
-            return name;
+            return nameBuilder.ToString();
         }
 
         private static bool TryGenerateStorageOp(

src/Ryujinx.HLE/FileSystem/ContentManager.cs

@@ -19,6 +19,7 @@ using System.Collections.Generic;
 using System.IO;
 using System.IO.Compression;
 using System.Linq;
+using System.Text;
 using Path = System.IO.Path;
 
 namespace Ryujinx.HLE.FileSystem
@@ -817,13 +818,13 @@ namespace Ryujinx.HLE.FileSystem
 
                     if (updateNcas.Count > 0)
                     {
-                        string extraNcas = string.Empty;
+                        StringBuilder extraNcas = new();
 
                         foreach (var entry in updateNcas)
                         {
                             foreach (var (type, path) in entry.Value)
                             {
-                                extraNcas += path + Environment.NewLine;
+                                extraNcas.AppendLine(path);
                             }
                         }
 
@@ -954,13 +955,13 @@ namespace Ryujinx.HLE.FileSystem
 
                 if (updateNcas.Count > 0)
                 {
-                    string extraNcas = string.Empty;
+                    StringBuilder extraNcas = new();
 
                     foreach (var entry in updateNcas)
                     {
                         foreach (var (type, path) in entry.Value)
                         {
-                            extraNcas += path + Environment.NewLine;
+                            extraNcas.AppendLine(path);
                         }
                     }
 

src/Ryujinx.HLE/HOS/Kernel/Process/HleProcessDebugger.cs

@@ -436,14 +436,14 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
 
             uint nameIndex = sym.NameOffset;
 
-            string name = string.Empty;
+            StringBuilder nameBuilder = new();
 
             for (int chr; (chr = memory.Read<byte>(strTblAddr + nameIndex++)) != 0;)
             {
-                name += (char)chr;
+                nameBuilder.Append((char)chr);
             }
 
-            return new ElfSymbol(name, sym.Info, sym.Other, sym.SectionIndex, sym.ValueAddress, sym.Size);
+            return new ElfSymbol(nameBuilder.ToString(), sym.Info, sym.Other, sym.SectionIndex, sym.ValueAddress, sym.Size);
         }
 
         private static ElfSymbol GetSymbol32(IVirtualMemoryManager memory, ulong address, ulong strTblAddr)
@@ -452,14 +452,14 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
 
             uint nameIndex = sym.NameOffset;
 
-            string name = string.Empty;
+            StringBuilder nameBuilder = new();
 
             for (int chr; (chr = memory.Read<byte>(strTblAddr + nameIndex++)) != 0;)
             {
-                name += (char)chr;
+                nameBuilder.Append((char)chr);
             }
 
-            return new ElfSymbol(name, sym.Info, sym.Other, sym.SectionIndex, sym.ValueAddress, sym.Size);
+            return new ElfSymbol(nameBuilder.ToString(), sym.Info, sym.Other, sym.SectionIndex, sym.ValueAddress, sym.Size);
         }
     }
 }

src/Ryujinx.HLE/HOS/Services/Sm/IUserInterface.cs

@@ -8,6 +8,7 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Reflection;
+using System.Text;
 
 namespace Ryujinx.HLE.HOS.Services.Sm
 {
@@ -235,7 +236,7 @@ namespace Ryujinx.HLE.HOS.Services.Sm
 
         private static string ReadName(ServiceCtx context)
         {
-            string name = string.Empty;
+            StringBuilder nameBuilder = new();
 
             for (int index = 0; index < 8 &&
                 context.RequestData.BaseStream.Position <
@@ -245,11 +246,11 @@ namespace Ryujinx.HLE.HOS.Services.Sm
 
                 if (chr >= 0x20 && chr < 0x7f)
                 {
-                    name += (char)chr;
+                    nameBuilder.Append((char)chr);
                 }
             }
 
-            return name;
+            return nameBuilder.ToString();
         }
 
         public override void DestroyAtExit()

src/Ryujinx.HLE/HOS/Services/Vi/RootService/IApplicationDisplayService.cs

@@ -142,7 +142,7 @@ namespace Ryujinx.HLE.HOS.Services.Vi.RootService
         // OpenDisplay(nn::vi::DisplayName) -> u64 display_id
         public ResultCode OpenDisplay(ServiceCtx context)
         {
-            string name = "";
+            StringBuilder nameBuilder = new();
 
             for (int index = 0; index < 8 && context.RequestData.BaseStream.Position < context.RequestData.BaseStream.Length; index++)
             {
@@ -150,11 +150,11 @@ namespace Ryujinx.HLE.HOS.Services.Vi.RootService
 
                 if (chr >= 0x20 && chr < 0x7f)
                 {
-                    name += (char)chr;
+                    nameBuilder.Append((char)chr);
                 }
             }
 
-            return OpenDisplayImpl(context, name);
+            return OpenDisplayImpl(context, nameBuilder.ToString());
         }
 
         [CommandCmif(1011)]

src/Ryujinx.Horizon/Sdk/Sm/ServiceName.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Runtime.InteropServices;
+using System.Text;
 
 namespace Ryujinx.Horizon.Sdk.Sm
 {
@@ -78,7 +79,7 @@ namespace Ryujinx.Horizon.Sdk.Sm
 
         public override string ToString()
         {
-            string name = string.Empty;
+            StringBuilder nameBuilder = new();
 
             for (int index = 0; index < sizeof(ulong); index++)
             {
@@ -89,10 +90,10 @@ namespace Ryujinx.Horizon.Sdk.Sm
                     break;
                 }
 
-                name += (char)character;
+                nameBuilder.Append((char)character);
             }
 
-            return name;
+            return nameBuilder.ToString();
         }
     }
 }

src/Ryujinx.Ui.LocaleGenerator/LocaleGenerator.cs

@@ -1,5 +1,6 @@
 using Microsoft.CodeAnalysis;
 using System.Linq;
+using System.Text;
 
 namespace Ryujinx.Ui.LocaleGenerator
 {
@@ -15,15 +16,17 @@ namespace Ryujinx.Ui.LocaleGenerator
             context.RegisterSourceOutput(contents, (spc, content) =>
             {
                 var lines = content.Split('\n').Where(x => x.Trim().StartsWith("\"")).Select(x => x.Split(':')[0].Trim().Replace("\"", ""));
-                string enumSource = "namespace Ryujinx.Ava.Common.Locale;\n";
-                enumSource += "internal enum LocaleKeys\n{\n";
+                StringBuilder enumSourceBuilder = new();
+                enumSourceBuilder.AppendLine("namespace Ryujinx.Ava.Common.Locale;");
+                enumSourceBuilder.AppendLine("internal enum LocaleKeys");
+                enumSourceBuilder.AppendLine("{");
                 foreach (var line in lines)
                 {
-                    enumSource += $"    {line},\n";
+                    enumSourceBuilder.AppendLine($"    {line},");
                 }
-                enumSource += "}\n";
+                enumSourceBuilder.AppendLine("}");
 
-                spc.AddSource("LocaleKeys", enumSource);
+                spc.AddSource("LocaleKeys", enumSourceBuilder.ToString());
             });
         }
     }