bool Deobfuscate2(Block block, int i)
{
var instrs = block.Instructions;
if (i >= instrs.Count - 2)
return false;
var ldsfld = instrs[i];
if (ldsfld.OpCode.Code != Code.Ldsfld)
return false;
var info = arrayBlockState.GetFieldInfo(ldsfld.Operand as IField);
if (info == null)
return false;
var ldci4 = instrs[i + 1];
if (!ldci4.IsLdcI4())
return false;
var ldelem = instrs[i + 2];
if (!IsLdelem(info, ldelem.OpCode.Code))
return false;
block.Remove(i, 3 - 1);
instrs[i] = new Instr(Instruction.CreateLdcI4((int)info.ReadArrayElement(ldci4.GetLdcI4Value())));
return true;
}
bool Deobfuscate3(Block block, int i)
{
var instrs = block.Instructions;
if (i + 1 >= instrs.Count)
return false;
int start = i;
var ldsfld = instrs[i];
if (ldsfld.OpCode.Code != Code.Ldsfld)
return false;
var info = arrayBlockState.GetFieldInfo(ldsfld.Operand as IField);
if (info == null)
return false;
if (!instrs[i + 1].IsLdcI4())
return false;
var constants = GetConstantsReader(block);
int value;
i += 2;
if (!constants.GetInt32(ref i, out value))
return false;
if (i >= instrs.Count)
return false;
var stelem = instrs[i];
if (!IsStelem(info, stelem.OpCode.Code))
return false;
block.Remove(start, i - start + 1);
return true;
}
bool Deobfuscate1(Block block, int i)
{
var instrs = block.Instructions;
if (i >= instrs.Count - 2)
return false;
var ldloc = instrs[i];
if (!ldloc.IsLdloc())
return false;
var local = ldloc.Instruction.GetLocal(Blocks.Locals);
if (local == null)
return false;
ArrayBlockState.FieldInfo info;
if (!localToInfo.TryGetValue(local, out info))
return false;
var ldci4 = instrs[i + 1];
if (!ldci4.IsLdcI4())
return false;
var ldelem = instrs[i + 2];
if (!IsLdelem(info, ldelem.OpCode.Code))
return false;
block.Remove(i, 3 - 1);
instrs[i] = new Instr(Instruction.CreateLdcI4((int)info.ReadArrayElement(ldci4.GetLdcI4Value())));
return true;
}
