424 lines
18 KiB
C#
424 lines
18 KiB
C#
using System;
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using System.CodeDom;
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using System.CodeDom.Compiler;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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using Kaitai;
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using Microsoft.CSharp;
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// ReSharper disable BitwiseOperatorOnEnumWithoutFlags
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namespace CodeGenerator {
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using CParamDeclExp = CodeParameterDeclarationExpression;
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using CArgRefExp = CodeArgumentReferenceExpression;
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using CThisRefExp = CodeThisReferenceExpression;
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using CFieldRefExp = CodeFieldReferenceExpression;
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public static class Program {
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private static BlendFile _blendfile;
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private static readonly StringBuilder Sb = new();
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private const string OutPath = @"GeneratedOutput";
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private const string Namespace = "BlendFile";
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private static HashSet<string> _customTypes;
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private static readonly string[] ListLenghtStr = {"count", "length", "size"};
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private static void Log(string message) {
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Sb.AppendLine(message);
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Console.WriteLine(message);
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}
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public static void Main(string[] args) {
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Log("Reading blend file");
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ReadBlendFile();
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Log("Generating C# code...");
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Log("Pass 1: Generating types");
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CodeNamespace ns = GenerateTypes(out var rootNs);
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Log("Pass 2: Writing out code");
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OutputCodeFiles(ns);
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OutputCodeFiles(rootNs, false);
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Log("Finished generating C# code!");
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File.AppendAllText("Log.txt", Sb.ToString());
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}
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private static void ReadBlendFile() {
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Log("Reading empty.blend file");
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_blendfile = BlendFile.FromFile("empty.blend");
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Log($"Header: Blender v{_blendfile.Hdr.Version} {_blendfile.Hdr.Endian}\n" +
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$"DataBlocks: {_blendfile.Blocks.Count}\n" +
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$"DNA1: {_blendfile.SdnaStructs.Count} structures\n");
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}
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private static CodeNamespace GenerateTypes(out CodeNamespace additionalNs) {
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//Initialize the namespaces
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CodeNamespace rootNs = new CodeNamespace(Namespace);
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CodeNamespace ns = new CodeNamespace(Namespace+".DNA");
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//Fill the attribute types then add them to the namespaces
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rootNs.Types.AddRange(GenerateTypeDeclarations());
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ns.Imports.Add(new(rootNs.Name));
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_customTypes = new();
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foreach (var type in _blendfile.SdnaStructs) {
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Log($"Generating struct {type.Type}");
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bool referenceSelf = false;
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bool referencePointer = false;
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//Add the type to the custom types list
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_customTypes.Add(type.Type);
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//Create a new type declaration
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var ctd = new CodeTypeDeclaration(type.Type);
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ctd.CustomAttributes.Add(new ("DNAClassAttribute",
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new CodeAttributeArgument(new CodePrimitiveExpression(type.IdxType)),
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new CodeAttributeArgument(new CodePrimitiveExpression(type.Type))
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));
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//TODO: when encountering a list, run trough the fields to find a count/lenght or similar data.
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foreach (var field in type.Fields) {
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if (field.Name.Contains("*")) {
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referencePointer = true;
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}
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if (field.Type.Contains(type.Type)) {
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referenceSelf = true;
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}
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}
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if (referenceSelf || referencePointer) {
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Log("Struct contains references");
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ctd.IsClass = true;
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}
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else {
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ctd.IsStruct = true;
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}
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//Add the class to the namespace
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ns.Types.Add(ctd);
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var totalSize = 0;
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//Add the fields to the class
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Log($"Fields: {type.Fields.Count}");
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for (var index = 0; index < type.Fields.Count; index++) {
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var field = type.Fields[index];
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CodeMemberField cmf;
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string name = field.Name;
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if (name.Contains("()")) continue;
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if (name.Contains("[")) {
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Log($"Generating array field {field.Name}");
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cmf = CreateArrayMemberField(field);
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}
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else {
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Log($"Generating field {field.Name}");
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cmf = CreateMemberField(field);
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}
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var attributes = GenerateDnaFieldAttribute(index, field, field.M_Parent.M_Parent, totalSize, out int size);
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totalSize += size;
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cmf.CustomAttributes.Add(attributes);
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ctd.Members.Add(cmf);
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}
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ctd.CustomAttributes[0].Arguments.Add(new CodeAttributeArgument(new CodePrimitiveExpression(totalSize)));
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Log("Generating Parameterless constructor");
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if(ctd.Members.Count > 0)
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ctd.Members.Add(GenerateParameterlessConstructor(type, ctd));
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Log("Generating Default Constructor");
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ctd.Members.Add(GenerateConstructor(type, ctd));
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Log("Finished generating struct");
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}
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additionalNs = rootNs;
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return ns;
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}
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private static CodeTypeDeclaration[] GenerateTypeDeclarations() {
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var attributeBuilder = new AttributeBuilder();
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var typeDeclarations = new CodeTypeDeclaration[] {
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attributeBuilder.New().SetName("DNAAttribute")
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.SetAttributeUsage(new (new CodeSnippetExpression("AttributeTargets.All")))
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.AddAutoProperty(typeof(int), "OriginalIndex")
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.AddAutoProperty(typeof(string), "OriginalName")
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.AddPropertiesConstructor()
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.Build(),
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attributeBuilder.New().SetName("DNAFieldAttribute")
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.SetAttributeUsage(new (new CodeSnippetExpression("AttributeTargets.Field")))
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.AddAutoProperty(typeof(int), "Size")
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.AddAutoProperty(typeof(string), "OriginalType")
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.AddAutoProperty(typeof(int), "OriginalIndex")
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.AddAutoProperty(typeof(string), "OriginalName")
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.AddAutoProperty(typeof(string), "UnderlyingType")
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.AddAutoProperty(typeof(bool), "IsPointer")
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.AddAutoProperty(typeof(int), "MemoryOffset")
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.AddPropertiesConstructor()
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.Build(),
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attributeBuilder.New().SetName("DNAClassAttribute")
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.SetAttributeUsage(new (new CodeSnippetExpression("AttributeTargets.Class | AttributeTargets.Struct")))
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.AddAutoProperty(typeof(int), "Size")
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.AddAutoProperty(typeof(int), "OriginalIndex")
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.AddAutoProperty(typeof(string), "OriginalName")
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.AddPropertiesConstructor()
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.Build(),
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attributeBuilder.New().SetName("DNAListAttribute")
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.SetAttributeUsage(new (new CodeSnippetExpression("AttributeTargets.Property | AttributeTargets.Field")))
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.AddAutoProperty(typeof(int), "Size")
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.AddAutoProperty(typeof(string), "OriginalType")
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.AddAutoProperty(typeof(string), "OriginalName")
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.AddAutoProperty(typeof(int), "OriginalIndex")
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.AddAutoProperty(typeof(string), "UnderlyingType")
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.AddAutoProperty(typeof(string), "CountFieldName")
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.AddAutoProperty(typeof(int), "CountFieldIndex")
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.AddAutoProperty(typeof(int), "MemoryOffset")
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.AddPropertiesConstructor()
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.Build()
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};
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return typeDeclarations;
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}
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private static CodeAttributeDeclaration GenerateDnaFieldAttribute(int index, BlendFile.DnaField field,
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BlendFile.Dna1Body body, int offset, out int size) {
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string t;
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size = body.Lengths[field.IdxType];
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bool isPointer = false;
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if (field.Name.StartsWith('*'))
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{
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size = 8;
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isPointer = true;
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}
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if (field.Name.Contains('[')) {
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CodeMemberField amf = CreateArrayMemberField(field);
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var sb = new StringBuilder();
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sb.Append(amf.Type.BaseType);
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sb.Append("[");
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for(int i=1; i<amf.Type.ArrayRank; i++) {
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sb.Append(",");
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}
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sb.Append("]");
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t = sb.ToString();
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var dimensions = GetArrayDimensions(field.Name);
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foreach(var dim in dimensions) {
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size *= dim;
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}
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} else
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{
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t = field.Type;
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}
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CodeAttributeDeclaration cad = new("DNAFieldAttribute");
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cad.Arguments.AddRange(new CodeAttributeArgumentCollection() {
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new(new CodePrimitiveExpression(index)),
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new(new CodePrimitiveExpression(field.Type)),
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new(new CodePrimitiveExpression(field.Name)),
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new(new CodePrimitiveExpression(t)),
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new(new CodePrimitiveExpression(size)),
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new(new CodePrimitiveExpression(isPointer)),
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new(new CodePrimitiveExpression(offset))
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});
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return cad;
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}
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private static CodeMemberField CreateMemberField(BlendFile.DnaField field) {
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Type t = Type.GetType(field.Type.ParseFType());
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CodeMemberField cmf;
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//Check if the type is a built-in type or a custom type
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if (t != null) cmf = new(t, field.Name.ParseFName()); //Built-in type
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else {
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cmf = new(new CodeTypeReference(field.Type), field.Name.ParseFName()); //Custom type
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_customTypes.Add(field.Type);
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}
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cmf.Attributes = MemberAttributes.Public;
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return cmf;
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}
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private static CodeMemberField CreateArrayMemberField(BlendFile.DnaField field) {
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Type t = Type.GetType(field.Type.ParseFType());
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CodeMemberField cmf;
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// Parse all array dimensions
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var name = field.Name.ParseFName();
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var dimensions = GetArrayDimensions(name);
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// Get clean field name (without array brackets)
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name = field.Name.ParseFName().Substring(0, field.Name.IndexOf('['));
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//Check if the type is a built-in type or a custom type
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if (t != null) cmf = new(t, name); //Built-in type
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else {
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cmf = new(field.Type, name); //Custom type
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_customTypes.Add(field.Type);
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}
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//Set the field attributes
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cmf.Attributes = MemberAttributes.Public;
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//Define the array type
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cmf.Type.ArrayElementType = new(field.Type.ParseFType() ?? field.Type);
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cmf.Type.ArrayRank = dimensions.Count;
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//Define the array initialization expression
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cmf.InitExpression = GenerateArrayInitExpression(cmf.Type, dimensions);
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return cmf;
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}
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private static List<int> GetArrayDimensions(string name)
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{
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var dimensions = new List<int>();
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int startIndex = 0;
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// Get all array dimensions
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while ((startIndex = name.IndexOf('[', startIndex)) != -1) {
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int endIndex = name.IndexOf(']', startIndex);
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string sizeStr = name.Substring(startIndex + 1, endIndex - startIndex - 1);
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if (int.TryParse(sizeStr, out int size)) {
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dimensions.Add(size);
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}
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startIndex = endIndex + 1;
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}
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return dimensions;
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}
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private static CodeExpression GenerateArrayInitExpression(CodeTypeReference type, IEnumerable<int> dimensions) {
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var dimValues = dimensions as int[] ?? dimensions.ToArray();
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string dims = string.Concat(dimValues.Take(dimValues.Count() - 1).Select(d => $"{d},"));
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dims += dimValues.Last();
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return new CodeSnippetExpression($"new {type.BaseType}[{dims}]");
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}
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private static CodeTypeConstructor GenerateStaticConstructor(CodeTypeDeclaration ctd) {
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CodeTypeConstructor ctc = new CodeTypeConstructor {
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Attributes = MemberAttributes.Static
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};
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ctc.Statements.AddRange(ctd.Members
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.OfType<CodeMemberField>()
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.Where(f => f.Type.ArrayRank > 0)
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.Select(f =>
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{
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var dims = new List<int>();
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for (int i = 0; i < f.Type.ArrayRank; i++) {
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dims.Add(0);
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}
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return new CodeAssignStatement(
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new CFieldRefExp(new CThisRefExp(), f.Name),
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GenerateArrayInitExpression(f.Type, dims)
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);
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}).ToArray<CodeStatement>());
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return ctc;
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}
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private static CodeConstructor GenerateConstructor(BlendFile.DnaStruct type, CodeTypeDeclaration ctd) {
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//Create a normal constructor
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CodeConstructor cc = new CodeConstructor {
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Name = type.Type,
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Attributes = MemberAttributes.Public,
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ReturnType = new(type.Type)
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};
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//Add the parameters to the constructor
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cc.Parameters.AddRange(ctd.Members
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.OfType<CodeMemberField>()
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.Select(f =>
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{
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var cpde = new CParamDeclExp(f.Type, f.Name) {
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Direction = FieldDirection.In
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};
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return cpde;
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}).ToArray());
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//Assign the parameters to the respective fields
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cc.Statements.AddRange(ctd.Members
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.OfType<CodeMemberField>()
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.Select(f => new CodeAssignStatement(
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new CFieldRefExp(new CThisRefExp(), f.Name),
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new CArgRefExp(f.Name))
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).ToArray<CodeStatement>());
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return cc;
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}
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private static CodeConstructor GenerateParameterlessConstructor(BlendFile.DnaStruct type, CodeTypeDeclaration ctd) {
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//Create a normal constructor
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CodeConstructor cc = new CodeConstructor {
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Name = type.Type,
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Attributes = MemberAttributes.Public,
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ReturnType = new(type.Type)
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};
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//Assign the parameters to the respective fields
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cc.Statements.AddRange(ctd.Members
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.OfType<CodeMemberField>()
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.Select(f => new CodeAssignStatement(
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new CFieldRefExp(new CThisRefExp(), f.Name),
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new CodeSnippetExpression("default"))
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).ToArray<CodeStatement>());
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return cc;
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}
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private static void SetupCcu(out CodeGeneratorOptions genOpts, out CSharpCodeProvider provider,
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out CodeCompileUnit ccu) {
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genOpts = new() {
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BlankLinesBetweenMembers = false,
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BracingStyle = "Block",
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ElseOnClosing = true,
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IndentString = " ",
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VerbatimOrder = true
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};
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provider = new();
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//var date = DateTime.Now.ToString(CultureInfo.InvariantCulture);
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CodeNamespace globalNs = new CodeNamespace();
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//CodeComment comment = new CodeComment("Automatically generated by BlenderSharp at " + date, false);
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//globalNs.Comments.Add(new(comment));
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globalNs.Imports.Add(new("System"));
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ccu = new();
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ccu.Namespaces.Add(globalNs);
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}
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private static void OutputCodeFiles(CodeNamespace ns, bool outputExtraTypes = true) {
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string rootPath = Path.GetDirectoryName(GetOutputPath(ns, ""));
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if (!Path.Exists(rootPath)) Directory.CreateDirectory(rootPath!);
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SetupCcu(out var codeGeneratorOptions, out var provider, out var ccu);
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CodeNamespace tempNs = new CodeNamespace(ns.Name);
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tempNs.Imports.AddRange(ns.Imports.Cast<CodeNamespaceImport>().ToArray());
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ccu.Namespaces.Add(tempNs);
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foreach (var type in ns.Types.OfType<CodeTypeDeclaration>()) {
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tempNs.Types.Add(type);
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Log($"Writing out {(type.IsStruct ? "struct" : "class")} {type.Name}");
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using var sw = new StreamWriter(GetOutputPath(ns, type.Name));
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provider.GenerateCodeFromCompileUnit(ccu, sw, codeGeneratorOptions);
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tempNs.Types.Remove(type);
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}
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if (!outputExtraTypes) return;
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_customTypes.ExceptWith(ns.Types.OfType<CodeTypeDeclaration>().Select(t => t.Name));
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foreach (var type in _customTypes) {
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Log($"Creating empty struct for missing {type}");
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var ctd = new CodeTypeDeclaration(type) {
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IsStruct = true,
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Attributes = MemberAttributes.Public
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};
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tempNs.Types.Add(ctd);
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}
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using var finalsw = new StreamWriter(GetOutputPath(ns, "_ExtraTypes"));
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provider.GenerateCodeFromCompileUnit(ccu, finalsw, codeGeneratorOptions);
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}
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private static string GetOutputPath(CodeNamespace ns, string typeName) {
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return Path.Combine(OutPath, ns.Name, typeName + ".cs");
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}
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}
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} |