Loadstring Interpreter

## imports ##
import sys, msvcrt

## variables ##
file = open(sys.argv[1], "r")
loadstring = file.read()
tokens, slots = [], []
index = 0
identifier_set = "_qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM0123456789"

for i in range(255): slots.append(0)

## lexer ##
while len(loadstring) > index:
    if (loadstring[index] in identifier_set):
        temporary_string = ""
        try:
            while (loadstring[index] in identifier_set):
                temporary_string += loadstring[index]
                index += 1
        except: ...
        tokens.append(temporary_string)
    index += 1
index = 0

## interpreter ##
while len(tokens) > index:
    ## load and copy #
    if (tokens[index] == "load"):
        index += 1
        value = int(tokens[index])
        index += 1
        slot = int(tokens[index])
        slots[slot] = value
    elif (tokens[index] == "copy"):
        index += 1
        value = slots[int(tokens[index])]
        index += 1
        slot = int(tokens[index])
        slots[slot] = value

    ## set_length ##
    elif (tokens[index] == "set_length"):
        index += 1
        value = int(tokens[index])
        index += 1
        slots = []
        for i in range(value): slots.append(int(tokens[index]))

    ## input ##
    elif (tokens[index] == "get_character"):
        index += 1
        mode = int(tokens[index])
        if (mode == 1): value = ord(msvcrt.getch())
        else: value = int(msvcrt.getch())
        index += 1
        slot = int(tokens[index])
        slots[slot] = value
    elif (tokens[index] == "get_character_output"):
        index += 1
        mode = int(tokens[index])
        if (mode == 1): value = ord(msvcrt.getche())
        else: value = int(msvcrt.getche())
        index += 1
        slot = int(tokens[index])
        slots[slot] = value

    ## compare #
    elif (tokens[index] == "compare"):
        index += 1
        register1 = slots[int(tokens[index])]
        index += 1
        register2 = slots[int(tokens[index])]
        compare_table = [register1, register2]

    ## jump instructions ##
    elif (tokens[index] == "jump_equal"):
        if (compare_table[0] == compare_table[1]):
            index += 1
            jump_index = int(tokens[index])
            index = jump_index
            continue
    elif (tokens[index] == "jump_greater"):
        if (compare_table[0] > compare_table[1]):
            index += 1
            jump_index = int(tokens[index])
            index = jump_index
            continue
    elif (tokens[index] == "jump_less"):
        if (compare_table[0] < compare_table[1]):
            index += 1
            jump_index = int(tokens[index])
            index = jump_index
            continue
    elif (tokens[index] == "jump"):
        index += 1
        jump_index = int(tokens[index])
        index = jump_index
        continue

    ## math operations ##
    elif (tokens[index] == "add"):
        index += 1
        slot1 = int(tokens[index])
        index += 1
        slot0 = int(tokens[index])
        slots[slot0] += slots[slot1]
    elif (tokens[index] == "subtract"):
        index += 1
        slot1 = int(tokens[index])
        index += 1
        slot0 = int(tokens[index])
        slots[slot0] -= slots[slot1]
    elif (tokens[index] == "clamp"):
        index += 1
        slot1 = tokens[index]
        index += 1
        slot0 = tokens[index]
        slots[int(slot0)] = int(str(slots[int(slot1)]) + str(slots[int(slot0)]))

    ## output ##
    elif (tokens[index] == "print"):
        index += 1
        mode = int(tokens[index])
        index += 1
        if (mode == 0): print(slots[int(tokens[index])], end = "")
        else: print(chr(slots[int(tokens[index])]), end = "")

    ## halt / break loop ##
    elif (tokens[index] == "halt"):
        print("process finished!1!1!11!!")
        break
    index += 1
input("\n")