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/*----------------------------------------------------------

This Source Code Form is subject to the terms of the

Mozilla Public License, v.2.0. If a copy of the MPL

was not distributed with this file, You can obtain one

at http://mozilla.org/MPL/2.0/.

----------------------------------------------------------*/

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Linq.Expressions;

using System.Reflection;

using OneScript.Commons;

using OneScript.Compilation;

using OneScript.Compilation.Binding;

using OneScript.Contexts;

using OneScript.Execution;

using OneScript.Native.Compiler;

using OneScript.Native.Runtime;

using OneScript.Sources;

using ScriptEngine.Machine;

namespace ScriptEngine.Compiler

{

public class ModuleDumpWriter

{

readonly ICompilerFrontend _compiler;

private readonly IBslProcess _process;

public ModuleDumpWriter(ICompilerFrontend compilerService, IBslProcess process)

{

_compiler = compilerService;

_process = process;

}

public void Write(TextWriter output, SourceCode source)

{

var compilerResult = _compiler.Compile(source, _process);

if (compilerResult is StackRuntimeModule stackModule)

{

var module = stackModule;

WriteImage(output, module);

}

else

{

WriteNativeModule(output, (DynamicModule)compilerResult);

}

}

private void WriteNativeModule(TextWriter output, DynamicModule compilerResult)

{

foreach (var attribute in compilerResult.ModuleAttributes)

{

output.WriteLine($"[{attribute.Name}]");

}

output.WriteLine("class DynamicModule");

output.WriteLine("{");

output.WriteLine(".fields");

foreach (var field in compilerResult.Fields)

{

PrintField(output, field);

}

output.WriteLine(".properties");

foreach (var prop in compilerResult.Properties)

{

PrintProperty(output, prop);

}

output.WriteLine(".methods");

foreach (var method in compilerResult.Methods)

{

PrintMethod(output, (BslNativeMethodInfo)method);

}

output.WriteLine("}");

}

private void PrintProperty(TextWriter output, BslPropertyInfo prop)

{

output.WriteLine();

foreach (var attribute in prop.GetAnnotations())

{

output.WriteLine($"[{attribute.Name}]");

}

output.WriteLine($"{prop.PropertyType} {prop.Name}");

}

private void PrintMethod(TextWriter output, BslNativeMethodInfo method)

{

output.WriteLine();

foreach (var attribute in method.GetAnnotations())

{

output.WriteLine($"[{attribute.Name}]");

}

var propertyInfo = typeof(Expression).GetProperty("DebugView", BindingFlags.Instance | BindingFlags.NonPublic);

output.WriteLine(propertyInfo.GetValue(method.Implementation) as string);

}

private void PrintField(TextWriter output, BslFieldInfo field)

{

output.WriteLine();

foreach (var attribute in field.GetAnnotations())

{

output.WriteLine($"[{attribute.Name}]");

}

output.WriteLine($"{field.FieldType} {field.Name}");

}

public void Write(TextWriter output, StackRuntimeModule module)

{

WriteImage(output, module);

}

private void WriteImage(TextWriter output, StackRuntimeModule module)

{

output.WriteLine(".variableFrame:");

module.Fields

.Cast<BslScriptFieldInfo>()

.OrderBy(x=>x.DispatchId)

.ForEach(x=>output.WriteLine($"{x.DispatchId}:{x.Name}{(x.IsPublic ? " export" : "")}"));

output.WriteLine(".constants");

for (int i = 0; i < module.Constants.Count; i++)

{

var item = module.Constants[i];

output.WriteLine(

$"{i,-3}:type: {item.SystemType.Alias}, val: {item}");

}

output.WriteLine(".identifiers");

for (int i = 0; i < module.Identifiers.Count; i++)

{

var item = module.Identifiers[i];

output.WriteLine(

$"{i,-3}: {item}");

}

output.WriteLine(".code");

for (int i = 0; i < module.Code.Count; i++)

{

var item = module.Code[i];

output.WriteLine(

$"{i,-3}:({Enum.GetName(typeof(OperationCode), item.Code),-10}{item.Argument,3})");

}

output.WriteLine(".procedures");

foreach (var item in module.Methods.Cast<MachineMethodInfo>())

{

WriteMethodDefinition(output, item.GetRuntimeMethod());

}

output.WriteLine(".varmap");

WriteSymbolMap(output, module.VariableRefs);

output.WriteLine(".procmap");

WriteSymbolMap(output, module.MethodRefs);

output.WriteLine(".moduleEntry");

output.WriteLine(module.EntryMethodIndex.ToString());

}

private void WriteSymbolMap(TextWriter output, IList<ModuleSymbolBinding> map)

{

for (int i = 0; i < map.Count; i++)

{

var item = map[i];

var targetInfo = item.Kind switch

{

ScopeBindingKind.Static => item.Target?.GetType().Name ?? "null",

ScopeBindingKind.ThisScope => "this",

ScopeBindingKind.FrameScope => $"frame[{item.ScopeIndex}]",

_ => "unknown"

};

output.Write(string.Format("{0,-3}:({1},{2},{3})\n", i, item.Kind, targetInfo, item.MemberNumber));

}

}

private void WriteAnnotationsList(TextWriter output, AnnotationDefinition[] annotations)

{

output.WriteLine(".annotations [");

foreach (var annotation in annotations)

{

output.Write(" {0}", annotation.Name);

if (annotation.ParamCount != 0)

{

var delimiter = ": ";

foreach (var parameter in annotation.Parameters)

{

output.Write(delimiter);

output.Write(parameter);

delimiter = ", ";

}

}

output.WriteLine("");

}

output.WriteLine("]");

}

private void WriteMethodDefinition(TextWriter output, MachineMethod item)

{

output.Write(item.Signature.IsFunction ? "Func " : "Proc ");

output.Write(

$"{item.Signature.Name} entryPoint: {item.EntryPoint}, frameSize:{item.LocalVariables.Length}\n");

if (item.Signature.AnnotationsCount != 0)

{

WriteAnnotationsList(output, item.Signature.Annotations);

}

output.Write(".args {0}\n", item.Signature.ArgCount);

if (item.Signature.Params != null)

{

for (int i = 0; i < item.Signature.Params.Length; i++)

{

output.Write("{0,-3}: ByVal={1}", i, item.Signature.Params[i].IsByValue);

if (item.Signature.Params[i].HasDefaultValue)

{

output.Write(" defValue: {0}\n", item.Signature.Params[i].DefaultValueIndex);

}

else

{

output.WriteLine();

}

}

}

output.WriteLine(".variables [");

for (int i = 0; i < item.LocalVariables.Length; i++)

{

output.WriteLine($" {i}:{item.LocalVariables[i]}");

}

output.WriteLine("]");

}

}

}