def not_instr():
""" NOT <var> <symb> """
check_scope_and_find_var('NOT', ActInstr.args[0])
op = check_logical_op('NOT', 1)
value = not op.value
var = Variable(ActInstr.args[0], 'bool', value)
insert_var_to_right_frame(var)
def check_string_op(instr, position):
""" Check operand in string operation in instructions like int2char, stri2int, concat, strlen, getchar, setchar """
if ActInstr.argsType[position] == 'var':
op = check_scope_and_find_var(instr, ActInstr.args[position])
else:
value = ippcode_type_to_python_type(ActInstr.argsType[position],
ActInstr.args[position])
op = Variable('op' + str(position), ActInstr.argsType[position], value)
return op
def mul():
""" MUL <var> <symb1> <symb2> """
check_scope_and_find_var('MUL', ActInstr.args[0])
op1 = check_arithmetic_op('MUL', 1)
op2 = check_arithmetic_op('MUL', 2)
value = op1 * op2
var = Variable(ActInstr.args[0], 'int', value)
insert_var_to_right_frame(var)
def check_jump_op(instr, position):
""" Check operand in jump operation in instructions like jump, jumpifeq, jumpifneq """
if ActInstr.argsType[position] == 'var':
op = check_scope_and_find_var(instr, ActInstr.args[position])
else:
value = ippcode_type_to_python_type(ActInstr.argsType[position],
ActInstr.args[position])
op = Variable('op' + str(position), ActInstr.argsType[position], value)
return op
def or_instr():
""" OR <var> <symb1> <symb2> """
check_scope_and_find_var('OR', ActInstr.args[0])
op1 = check_logical_op('OR', 1)
op2 = check_logical_op('OR', 2)
value = op1.value or op2.value
var = Variable(ActInstr.args[0], 'bool', value)
insert_var_to_right_frame(var)
def strlen():
""" STRLEN <var> <symb> """
check_scope_and_find_var('STRLEN', ActInstr.args[0])
op = check_string_op('STRLEN', 1)
# check data type
if op.dataType != 'string':
sys.stderr.write('STRLEN: symb1 data type isnt str\n')
sys.exit(operand_type_err)
value = len(op.value)
var = Variable(ActInstr.args[0], 'int', value)
insert_var_to_right_frame(var)
def gt():
""" GT <var> <symb1> <symb2> """
check_scope_and_find_var('GT', ActInstr.args[0])
op1 = check_relational_op('GT', 1)
op2 = check_relational_op('GT', 2)
# check allowed data types
if op1.dataType != op2.dataType:
sys.stderr.write('GT: symb1 a symb2 doesn\'t have the same data type')
sys.exit(operand_type_err)
value = op1.value > op2.value
var = Variable(ActInstr.args[0], 'bool', value)
insert_var_to_right_frame(var)
def idiv():
""" IDIV <var> <symb1> <symb2> """
check_scope_and_find_var('IDIV', ActInstr.args[0])
op1 = check_arithmetic_op('IDIV', 1)
op2 = check_arithmetic_op('IDIV', 2)
# check division by 0
if op2 == 0:
sys.stderr.write('IDIV: division by 0\n')
sys.exit(zero_div_err)
value = op1 // op2
var = Variable(ActInstr.args[0], 'int', value)
insert_var_to_right_frame(var)
def concat():
"""" CONCAT <var> <symb1> <symb2> """
check_scope_and_find_var('CONCAT', ActInstr.args[0])
op1 = check_string_op('CONCAT', 1)
op2 = check_string_op('CONCAT', 2)
# check data type
if op1.dataType != 'string' or op2.dataType != 'string':
sys.stderr.write('CONCAT: symb1 or symb2 data type isnt string')
sys.exit(operand_type_err)
value = op1.value + op2.value
var = Variable(ActInstr.args[0], 'string', value)
insert_var_to_right_frame(var)
def type_instr():
""" TYPE <var> <symb> """
check_scope_and_find_var('TYPE', ActInstr.args[0])
op1 = check_string_op('SETCHAR', 1)
# save value to right frame acorfing <var>
if re.search(r'^[-+]?\d+$', str(op1.value)):
data_type = "int"
elif re.search(r'^True|False$', str(op1.value)):
data_type = "bool"
else:
data_type = "string"
var = Variable(ActInstr.args[0], 'setBool', data_type)
insert_var_to_right_frame(var)
def pops():
""" POPS <var> """
global dataStack
# check data stack size
if len(dataStack) == 0:
sys.stderr.write('POPS: data stack is empty\n')
sys.exit(no_value_err)
# check scope of <var>
check_scope_and_find_var('POPS', ActInstr.args[0])
# remove value from data stack
var = dataStack.pop()
new_var = Variable(ActInstr.args[0], var.dataType, var.value)
# add new_var to <var> frame
insert_var_to_right_frame(new_var)
def write():
""" WRITE <symb> """
if ActInstr.argsType[0] == 'var':
var = check_scope_and_find_var('WRITE', ActInstr.args[0])
else:
value = ippcode_type_to_python_type(ActInstr.argsType[0],
ActInstr.args[0])
var = Variable('literal', ActInstr.argsType[0], value)
if var.dataType == 'bool':
if var.value is True:
print('true')
else:
print('false')
else:
print(str(var.value))
def check_logical_op(instr, position):
""" Check operand in logical operation in instructions like and, or, not """
if ActInstr.argsType[position] == 'var':
op = check_scope_and_find_var(instr, ActInstr.args[position])
if op.dataType != 'bool':
sys.stderr.write(instr + ' symb' + str(position) +
' is var but value ins\'t bool\n')
sys.exit(operand_type_err)
else:
value = ippcode_type_to_python_type(ActInstr.argsType[position],
ActInstr.args[position])
op = Variable('op' + str(position), ActInstr.argsType[position], value)
if op.data_type != 'bool':
sys.stderr.write(instr + 'op' + str(position) +
' is literal but value ins\'t bool')
sys.exit(operand_type_err)
return op
def int2char():
""" INT2CHAR <var> <symb> """
check_scope_and_find_var('INT2CHAR', ActInstr.args[0])
op = check_string_op('INT2CHAR', 1)
# check data type
if op.dataType != 'int':
sys.stderr.write('INT2CHAR: symb data type isn\'t int')
sys.exit(operand_type_err)
try:
value = chr(op.value)
except TypeError:
sys.stderr.write('INT2CHAR: not unciode value')
sys.exit(str_operation_err)
var = Variable(ActInstr.args[0], 'str', value)
insert_var_to_right_frame(var)
def pushs():
""" PUSHS <symb> """
global dataStack
if ActInstr.argsType[0] == 'var':
# <symb> is variable
var = check_scope_and_find_var('PUSHS', ActInstr.args[0])
if var.dataType == 'nondef':
sys.stderr.write('PUSHS: variable has undefined value\n')
sys.exit(no_value_err)
else:
# <symb> is literal
value = ippcode_type_to_python_type(ActInstr.argsType[0],
ActInstr.args[0])
var = Variable('literal', ActInstr.argsType[0], value)
# add value and data type to data stack
dataStack.append(var)
def stri2int():
""" STRI2INT <var> <symb1> <symb2> """
check_scope_and_find_var('STRI2INT', ActInstr.args[0])
op1 = check_string_op('STRI2INT', 1)
op2 = check_string_op('STRI2INT', 2)
# check data types and indexing in string
if op1.dataType != 'string' or op2.dataType != 'int':
sys.stderr.write('STRI2INT: symb1 or symb2 data type isn\'t ok')
sys.exit(operand_type_err)
if len(op1.value) - 1 < op2.value or op2.value < 0:
sys.stderr.write('STRI2INT: indexing out of the string\n')
sys.exit(str_operation_err)
value = ord(op1.value[op2.value])
var = Variable(ActInstr.args[0], 'int', value)
insert_var_to_right_frame(var)
def getchar():
""" GETCHAR <var> <symb1> <symb2> """
check_scope_and_find_var('GETCHAR', ActInstr.args[0])
op1 = check_string_op('GETCHAR', 1)
op2 = check_string_op('GETCHAR', 2)
# check data types and indexing
if op1.dataType != 'string' or op2.dataType != 'int':
sys.stderr.write('GETCHAR: symb1 or symb2 data type isn\'t ok')
sys.exit(operand_type_err)
if len(op1.value) - 1 < op2.value or op2.value < 0:
sys.stderr.write(
'GETCHAR: len of op1 string is bigger than required index op2')
sys.exit(str_operation_err)
value = op1.value[op2.value]
var = Variable(ActInstr.args[0], 'string', value)
insert_var_to_right_frame(var)