public int[] RunProgram(int[] program)
{
var parameterModes = new int[2];
var infiniteLoopCheck = 0;
var running = true;
var instructionPointer = 0;
//for (int i = 0; i < program.Length; i++)
while (running && infiniteLoopCheck < int.MaxValue)
{
infiniteLoopCheck++;
var opcode = program[instructionPointer] % 100;
var parameterModeString = ((program[instructionPointer] - opcode) / 100).ToString("00");
parameterModes[0] = (int)char.GetNumericValue(parameterModeString[1]);
parameterModes[1] = (int)char.GetNumericValue(parameterModeString[0]);
switch (opcode)
{
case 1: //Add
{
var firstIndex = program[instructionPointer + 1];
var secondIndex = program[instructionPointer + 2];
var resultIndex = program[instructionPointer + 3];
program[resultIndex] = ReadValue(program, firstIndex, parameterModes[0])
+ ReadValue(program, secondIndex, parameterModes[1]);
instructionPointer += 3;
break;
}
case 2: // Mult
{
var firstIndex = program[instructionPointer + 1];
var secondIndex = program[instructionPointer + 2];
var resultIndex = program[instructionPointer + 3];
program[resultIndex] = ReadValue(program, firstIndex, parameterModes[0]) *
ReadValue(program, secondIndex, parameterModes[1]);
instructionPointer += 3;
break;
}
case 3: //Input
{
var resultIndex = program[instructionPointer + 1];
program[resultIndex] = int.Parse(_ioSystem.ReadIn());
instructionPointer += 1;
break;
}
case 4: //Output
{
var resultIndex = program[instructionPointer + 1];
var val = ReadValue(program, resultIndex, parameterModes[0]);
_ioSystem.WriteOut(val.ToString());
instructionPointer += 1;
break;
}
case 5: //jump-if-true
{
var firstIndex = program[instructionPointer + 1];
var secondIndex = program[instructionPointer + 2];
var value1 = ReadValue(program, firstIndex, parameterModes[0]);
var value2 = ReadValue(program, secondIndex, parameterModes[1]);
if (value1 != 0)
{
instructionPointer = value2;
continue;
}
instructionPointer += 2;
break;
}
case 6: //jump-if-false
{
var firstIndex = program[instructionPointer + 1];
var secondIndex = program[instructionPointer + 2];
var value1 = ReadValue(program, firstIndex, parameterModes[0]);
var value2 = ReadValue(program, secondIndex, parameterModes[1]);
if (value1 == 0)
{
instructionPointer = value2;
continue;
}
instructionPointer += 2;
break;
}
case 7: //less than
{
var firstIndex = program[instructionPointer + 1];
var secondIndex = program[instructionPointer + 2];
var value1 = ReadValue(program, firstIndex, parameterModes[0]);
var value2 = ReadValue(program, secondIndex, parameterModes[1]);
var resultIndex = program[instructionPointer + 3];
program[resultIndex] = (value1 < value2) ? 1 : 0;
instructionPointer += 3;
break;
}
case 8: // Equals
{
var firstIndex = program[instructionPointer + 1];
var secondIndex = program[instructionPointer + 2];
var value1 = ReadValue(program, firstIndex, parameterModes[0]);
var value2 = ReadValue(program, secondIndex, parameterModes[1]);
var resultIndex = program[instructionPointer + 3];
program[resultIndex] = (value1 == value2) ? 1 : 0;
instructionPointer += 3;
break;
}
case 99: // Terminate
running = false;
continue;
default:
throw new Exception("Bad command");
}
instructionPointer++;
}
return program;
}
public int[] RunProgram(int[] program)
{
var parameterModes = new int[2];
for (int i = 0; i < program.Length; i++)
{
var opcode = program[i] % 100;
var parameterModeString = ((program[i] - opcode) / 100).ToString("00");
parameterModes[0] = (int)char.GetNumericValue(parameterModeString[1]);
parameterModes[1] = (int)char.GetNumericValue(parameterModeString[0]);
//parameterModes[2] = (int)char.GetNumericValue(parameterModeString[1]);
//parameterModes[3] = (int)char.GetNumericValue(parameterModeString[0]);
switch (opcode)
{
case 1:
{
var firstIndex = program[i + 1];
var secondIndex = program[i + 2];
var resultIndex = program[i + 3];
program[resultIndex] = ReadValue(program, firstIndex, parameterModes[0])
+ ReadValue(program, secondIndex, parameterModes[1]);
i += 3;
break;
}
case 2:
{
var firstIndex = program[i + 1];
var secondIndex = program[i + 2];
var resultIndex = program[i + 3];
program[resultIndex] = ReadValue(program, firstIndex, parameterModes[0]) *
ReadValue(program, secondIndex, parameterModes[1]);
i += 3;
break;
}
case 3:
{
var resultIndex = program[i + 1];
program[resultIndex] = int.Parse(_ioSystem.ReadIn());
i += 1;
break;
}
case 4:
{
var resultIndex = program[i + 1];
var val = ReadValue(program, resultIndex, parameterModes[0]);
_ioSystem.WriteOut(val.ToString());
i += 1;
break;
}
case 99:
i = program.Length - 1;
break;
default:
throw new Exception("Bad command");
}
}
return(program);
}
