internal BFFile(BFCodeLabel[] procedures, BFCodeLabel[] jumpLabels, List<BFOpcode> opcodes, BMDFile messageFile = null)
{
_procedures = procedures;
_jumpLabels = jumpLabels;
_opcodes = opcodes;
_messageFile = messageFile;
}
private static BFCodeLabel ParseASMLabel(int lineIndex, string nameToken, int jumpIndex, int opIndex, params char[] splitChars)
{
BFCodeLabel label = new BFCodeLabel()
{
Name = nameToken.Split(splitChars, StringSplitOptions.RemoveEmptyEntries)[0],
ID = jumpIndex,
OpcodeIndex = opIndex
};
if (label.Name.Length == 0)
throw new BFASMParserException("Label", lineIndex + 1);
return label;
}
private static void ReadCodeLabels(BinaryReader reader, ref BFCodeLabel[] array, int count, out bool requireSort)
{
array = new BFCodeLabel[count];
requireSort = false;
int lastIdx = -1;
for (int j = 0; j < array.Length; j++)
{
array[j] = new BFCodeLabel(reader);
if (!requireSort && lastIdx > array[j].OpcodeIndex)
requireSort = true;
else
lastIdx = array[j].OpcodeIndex;
}
}
public static void Disassemble(string path, List<BFOpcode> opcodes, BFCodeLabel[] procedures, BFCodeLabel[] jumpLabels)
{
using (StreamWriter writer = new StreamWriter(File.Create(path)))
{
int procIdx = 0;
int jumpIdx = 0;
// sorting these is faster than searching every interation
BFCodeLabel[] sortedProcedures = procedures.OrderBy(i => i.OpcodeIndex).ToArray();
BFCodeLabel[] sortedJumpLabels = jumpLabels.OrderBy(i => i.OpcodeIndex).ToArray();
for (int i = 0; i < opcodes.Count; i++)
{
BFOpcode op = opcodes[i];
BFCodeLabel procedure = null;
BFCodeLabel jumpLabel = null;
// first check if maybe a procedure starts at this index
if (procIdx != sortedProcedures.Length && sortedProcedures[procIdx].OpcodeIndex == i)
{
procedure = sortedProcedures[procIdx++];
writer.WriteLine("\n" + procedure.Name + ": \t; start of procedure \"{0}\"", procedure.Name);
}
// if it's not the start of a procedure then check if it's maybe a jump label
else if (jumpIdx != sortedJumpLabels.Length && sortedJumpLabels[jumpIdx].OpcodeIndex == i)
{
jumpLabel = sortedJumpLabels[jumpIdx++];
writer.WriteLine("\n@" + jumpLabel.Name + ": \t; jump label \"{0}\"", jumpLabel.Name);
}
bool isKnown = BFInstructionToASMKeyword.ContainsKey(op.Instruction);
string opStr = isKnown ?
BFInstructionToASMKeyword[op.Instruction] :
"unk_" + op.Instruction.ToString("X");
switch (op.Instruction)
{
case BFInstruction.CallNative:
BFCallNativeType callType = (BFCallNativeType)op.Operand.ImmediateValue;
opStr += " " + callType + (Enum.IsDefined(typeof(BFCallNativeType), callType) ? " \t; " + CallNativeToHintString[callType] : string.Empty);
break;
case BFInstruction.BeginProcedure:
opStr += " " + procedure.Name;
break;
case BFInstruction.CallProcedure:
opStr += " " + procedures[(int)op.Operand.ImmediateValue].Name;
break;
case BFInstruction.Jump:
case BFInstruction.JumpIfFalse:
opStr += " @" + jumpLabels[(int)op.Operand.ImmediateValue].Name;
break;
default:
if (op.Operand != null)
opStr += " " + op.Operand.ToString();
break;
}
writer.WriteLine("\t" + opStr);
}
}
}
