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using System;
using System.IO;
using Mono.Cecil;
using Mono.Cecil.Cil;
namespace Mono.Cecil.Tests {
public static class Formatter {
public static string FormatInstruction (Instruction instruction)
{
var writer = new StringWriter ();
WriteInstruction (writer, instruction);
return writer.ToString ();
}
public static string FormatMethodBody (MethodDefinition method)
{
var writer = new StringWriter ();
WriteMethodBody (writer, method);
return writer.ToString ();
}
public static void WriteMethodBody (TextWriter writer, MethodDefinition method)
{
var body = method.Body;
WriteVariables (writer, body);
foreach (Instruction instruction in body.Instructions) {
var sequence_point = body.Method.DebugInformation.GetSequencePoint (instruction);
if (sequence_point != null) {
writer.Write ('\t');
WriteSequencePoint (writer, sequence_point);
writer.WriteLine ();
}
writer.Write ('\t');
WriteInstruction (writer, instruction);
writer.WriteLine ();
}
WriteExceptionHandlers (writer, body);
}
static void WriteVariables (TextWriter writer, MethodBody body)
{
var variables = body.Variables;
writer.Write ('\t');
writer.Write (".locals {0}(", body.InitLocals ? "init " : string.Empty);
for (int i = 0; i < variables.Count; i++) {
if (i > 0)
writer.Write (", ");
var variable = variables [i];
writer.Write ("{0} {1}", variable.VariableType, GetVariableName (variable, body));
}
writer.WriteLine (")");
}
static string GetVariableName (VariableDefinition variable, MethodBody body)
{
string name;
if (body.Method.DebugInformation.TryGetName (variable, out name))
return name;
return variable.ToString ();
}
static void WriteInstruction (TextWriter writer, Instruction instruction)
{
writer.Write (FormatLabel (instruction.Offset));
writer.Write (": ");
writer.Write (instruction.OpCode.Name);
if (null != instruction.Operand) {
writer.Write (' ');
WriteOperand (writer, instruction.Operand);
}
}
static void WriteSequencePoint (TextWriter writer, SequencePoint sequence_point)
{
writer.Write (".line {0},{1}:{2},{3} '{4}'",
sequence_point.StartLine,
sequence_point.EndLine,
sequence_point.StartColumn,
sequence_point.EndColumn,
sequence_point.Document.Url);
}
static string FormatLabel (int offset)
{
string label = "000" + offset.ToString ("x");
return "IL_" + label.Substring (label.Length - 4);
}
static string FormatLabel (Instruction instruction)
{
return FormatLabel (instruction.Offset);
}
static void WriteOperand (TextWriter writer, object operand)
{
if (null == operand) throw new ArgumentNullException ("operand");
var target = operand as Instruction;
if (null != target) {
writer.Write (FormatLabel (target.Offset));
return;
}
var targets = operand as Instruction [];
if (null != targets) {
WriteLabelList (writer, targets);
return;
}
string s = operand as string;
if (null != s) {
writer.Write ("\"" + s + "\"");
return;
}
var parameter = operand as ParameterDefinition;
if (parameter != null) {
writer.Write (ToInvariantCultureString (parameter.Sequence));
return;
}
s = ToInvariantCultureString (operand);
writer.Write (s);
}
static void WriteLabelList (TextWriter writer, Instruction [] instructions)
{
writer.Write ("(");
for (int i = 0; i < instructions.Length; i++) {
if (i != 0) writer.Write (", ");
writer.Write (FormatLabel (instructions [i].Offset));
}
writer.Write (")");
}
static void WriteExceptionHandlers (TextWriter writer, MethodBody body)
{
if (!body.HasExceptionHandlers)
return;
foreach (var handler in body.ExceptionHandlers) {
writer.Write ("\t");
writer.WriteLine (".try {0} to {1} {2} handler {3} to {4}",
FormatLabel (handler.TryStart),
FormatLabel (handler.TryEnd),
FormatHandlerType (handler),
FormatLabel (handler.HandlerStart),
FormatLabel (handler.HandlerEnd));
}
}
static string FormatHandlerType (ExceptionHandler handler)
{
var handler_type = handler.HandlerType;
var type = handler_type.ToString ().ToLowerInvariant ();
switch (handler_type) {
case ExceptionHandlerType.Catch:
return string.Format ("{0} {1}", type, handler.CatchType.FullName);
case ExceptionHandlerType.Filter:
throw new NotImplementedException ();
default:
return type;
}
}
public static string ToInvariantCultureString (object value)
{
var convertible = value as IConvertible;
return (null != convertible)
? convertible.ToString (System.Globalization.CultureInfo.InvariantCulture)
: value.ToString ();
}
}
}
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