internal MethodCopier(MethodBase fromMethod, ILGenerator toILGenerator, LocalBuilder[] existingVariables = null)
{
if (fromMethod is null)
{
throw new ArgumentNullException(nameof(fromMethod));
}
reader = new MethodBodyReader(fromMethod, toILGenerator);
reader.DeclareVariables(existingVariables);
reader.ReadInstructions();
}
/// <summary>Returns the methods unmodified list of code instructions</summary>
/// <param name="original">The original method/constructor</param>
/// <param name="generator">Optionally an existing generator that will be used to create all local variables and labels contained in the result (if not specified, an internal generator is used)</param>
/// <returns>A list containing all the original <see cref="CodeInstruction"/></returns>
///
public static List <CodeInstruction> GetOriginalInstructions(MethodBase original, ILGenerator generator = null)
{
if (generator == null)
{
var method = new DynamicMethodDefinition($"{original.Name}_Copy{Guid.NewGuid()}", typeof(void), new Type[0]);
generator = method.GetILGenerator();
}
var reader = MethodBodyReader.GetInstructions(generator, original);
return(reader.Select(ins => ins.GetCodeInstruction()).ToList());
}
internal static List <ILInstruction> GetInstructions(ILGenerator generator, MethodBase method)
{
if (method == null)
{
throw new ArgumentNullException(nameof(method));
}
var reader = new MethodBodyReader(method, generator);
reader.DeclareVariables(null);
reader.ReadInstructions();
return(reader.ilInstructions);
}
/// <summary>A low level way to read the body of a method. Used for quick searching in methods</summary>
/// <param name="method">The original method</param>
/// <param name="generator">An existing generator that will be used to create all local variables and labels contained in the result</param>
/// <returns>All instructions as opcode/operand pairs</returns>
///
public static IEnumerable <KeyValuePair <OpCode, object> > ReadMethodBody(MethodBase method, ILGenerator generator)
{
return(MethodBodyReader.GetInstructions(generator, method)
.Select(instr => new KeyValuePair <OpCode, object>(instr.opcode, instr.operand)));
}
/// <summary>Returns the methods unmodified list of code instructions</summary>
/// <param name="original">The original method/constructor</param>
/// <param name="generator">Optionally an existing generator that will be used to create all local variables and labels contained in the result (if not specified, an internal generator is used)</param>
/// <returns>A list containing all the original <see cref="CodeInstruction"/></returns>
///
public static List <CodeInstruction> GetOriginalInstructions(MethodBase original, ILGenerator generator = null)
{
var reader = MethodBodyReader.GetInstructions(generator ?? CreateILGenerator(), original);
return(reader.Select(ins => ins.GetCodeInstruction()).ToList());
}
/// <summary>Gets all instructions from a method</summary>
/// <param name="generator">The generator (for defining labels)</param>
/// <param name="method">The original method</param>
/// <returns>The instructions</returns>
///
public static List <ILInstruction> GetInstructions(ILGenerator generator, MethodBase method)
{
return(MethodBodyReader.GetInstructions(generator, method));
}