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using System;
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Diagnostics.Contracts;
using System.IO;
using System.Linq;
using ReClassNET.Extensions;
using ReClassNET.Logger;
using ReClassNET.Nodes;
using ReClassNET.Project;
namespace ReClassNET.CodeGenerator
{
public class CSharpCodeGenerator : ICodeGenerator
{
private static readonly Dictionary<Type, string> nodeTypeToTypeDefinationMap = new Dictionary<Type, string>
{
[typeof(DoubleNode)] = "double",
[typeof(FloatNode)] = "float",
[typeof(BoolNode)] = "bool",
[typeof(Int8Node)] = "sbyte",
[typeof(Int16Node)] = "short",
[typeof(Int32Node)] = "int",
[typeof(Int64Node)] = "long",
[typeof(UInt8Node)] = "byte",
[typeof(UInt16Node)] = "ushort",
[typeof(UInt32Node)] = "uint",
[typeof(UInt64Node)] = "ulong",
[typeof(FunctionPtrNode)] = "IntPtr",
[typeof(Utf8TextPtrNode)] = "IntPtr",
[typeof(Utf16TextPtrNode)] = "IntPtr",
[typeof(Utf32TextPtrNode)] = "IntPtr",
[typeof(PointerNode)] = "IntPtr",
[typeof(VirtualMethodTableNode)] = "IntPtr"
};
public Language Language => Language.CSharp;
public string GenerateCode(IReadOnlyList<ClassNode> classes, IReadOnlyList<EnumDescription> enums, ILogger logger)
{
using (var sw = new StringWriter())
{
using (var iw = new IndentedTextWriter(sw, "\t"))
{
iw.WriteLine($"// Created with {Constants.ApplicationName} {Constants.ApplicationVersion} by {Constants.Author}");
iw.WriteLine();
iw.WriteLine("// Warning: The C# code generator doesn't support all node types!");
iw.WriteLine();
iw.WriteLine("using System.Runtime.InteropServices;");
iw.WriteLine();
using (var en = enums.GetEnumerator())
{
if (en.MoveNext())
{
WriteEnum(iw, en.Current);
while (en.MoveNext())
{
iw.WriteLine();
WriteEnum(iw, en.Current);
}
iw.WriteLine();
}
}
var classesToWrite = classes
.Where(c => c.Nodes.None(n => n is FunctionNode)) // Skip class which contains FunctionNodes because these are not data classes.
.Distinct();
using (var en = classesToWrite.GetEnumerator())
{
if (en.MoveNext())
{
WriteClass(iw, en.Current, logger);
while (en.MoveNext())
{
iw.WriteLine();
WriteClass(iw, en.Current, logger);
}
}
}
}
return sw.ToString();
}
}
/// <summary>
/// Outputs the C# code for the given enum to the <see cref="TextWriter"/> instance.
/// </summary>
/// <param name="writer">The writer to output to.</param>
/// <param name="enum">The enum to output.</param>
private static void WriteEnum(IndentedTextWriter writer, EnumDescription @enum)
{
Contract.Requires(writer != null);
Contract.Requires(@enum != null);
writer.Write($"enum {@enum.Name} : ");
switch (@enum.Size)
{
case EnumDescription.UnderlyingTypeSize.OneByte:
writer.WriteLine(nodeTypeToTypeDefinationMap[typeof(Int8Node)]);
break;
case EnumDescription.UnderlyingTypeSize.TwoBytes:
writer.WriteLine(nodeTypeToTypeDefinationMap[typeof(Int16Node)]);
break;
case EnumDescription.UnderlyingTypeSize.FourBytes:
writer.WriteLine(nodeTypeToTypeDefinationMap[typeof(Int32Node)]);
break;
case EnumDescription.UnderlyingTypeSize.EightBytes:
writer.WriteLine(nodeTypeToTypeDefinationMap[typeof(Int64Node)]);
break;
}
writer.WriteLine("{");
writer.Indent++;
for (var j = 0; j < @enum.Values.Count; ++j)
{
var kv = @enum.Values[j];
writer.Write(kv.Key);
writer.Write(" = ");
writer.Write(kv.Value);
if (j < @enum.Values.Count - 1)
{
writer.Write(",");
}
writer.WriteLine();
}
writer.Indent--;
writer.WriteLine("};");
}
/// <summary>
/// Outputs the C# code for the given class to the <see cref="TextWriter"/> instance.
/// </summary>
/// <param name="writer">The writer to output to.</param>
/// <param name="class">The class to output.</param>
/// <param name="logger">The logger.</param>
private static void WriteClass(IndentedTextWriter writer, ClassNode @class, ILogger logger)
{
Contract.Requires(writer != null);
Contract.Requires(@class != null);
Contract.Requires(logger != null);
writer.WriteLine("[StructLayout(LayoutKind.Explicit)]");
writer.Write("class ");
writer.Write(@class.Name);
if (!string.IsNullOrEmpty(@class.Comment))
{
writer.Write(" // ");
writer.Write(@class.Comment);
}
writer.WriteLine();
writer.WriteLine("{");
writer.Indent++;
var nodes = @class.Nodes
.WhereNot(n => n is FunctionNode || n is BaseHexNode);
foreach (var node in nodes)
{
var type = GetTypeDefinition(node);
if (type != null)
{
writer.Write("[FieldOffset(");
writer.Write(node.Offset);
writer.WriteLine(")]");
writer.Write("public ");
writer.Write(type);
writer.Write(" ");
writer.Write(node.Name);
writer.Write("; //0x");
writer.Write($"{node.Offset:X04}");
if (!string.IsNullOrEmpty(node.Comment))
{
writer.Write(" ");
writer.Write(node.Comment);
}
writer.WriteLine();
}
else
{
logger.Log(LogLevel.Warning, $"Skipping node with unhandled type: {node.GetType()}");
}
}
writer.Indent--;
writer.WriteLine("}");
}
/// <summary>
/// Gets the type definition for the given node. If the node is not a simple node <c>null</c> is returned.
/// </summary>
/// <param name="node">The target node.</param>
/// <returns>The type definition for the node or null if no simple type is available.</returns>
private static string GetTypeDefinition(BaseNode node)
{
Contract.Requires(node != null);
if (node is BitFieldNode bitFieldNode)
{
var underlayingNode = bitFieldNode.GetUnderlayingNode();
underlayingNode.CopyFromNode(node);
node = underlayingNode;
}
if (nodeTypeToTypeDefinationMap.TryGetValue(node.GetType(), out var type))
{
return type;
}
if (node is EnumNode enumNode)
{
return enumNode.Enum.Name;
}
return null;
}
}
}