def check_all(self):
eq = self.check_ac().upper()
eq_parts = eq.split('=')
if (len(eq_parts) != 2):
Printer.error("format")
for part in eq_parts:
if (len(part) == 0):
Printer.error("format")
self.check_characters(part)
return (eq)
def check_characters(self, eq):
i = 0
eq_len = len(eq)
if (self.is_operator(eq[0]) and eq[0] != '-'):
Printer.error("format")
while (i < eq_len):
if (eq[i].isdigit()):
while (i + 1 < eq_len and eq[i].isdigit()):
i += 1
# case : not digit(0123456789) not X not op(+-/*^.)
if (not self.is_operator(eq[i])
and not self.is_number_or_x(eq[i])):
Printer.error("format")
# case : .
if (eq[i] == '.'):
if (not eq[i - 1].isdigit() or not eq[i + 1].isdigit()):
Printer.error("format")
while (i + 1 < eq_len and eq[i + 1].isdigit()):
i += 1
if (i + 1 == eq_len and not eq[i].isdigit()):
Printer.error("format")
elif (i + 1 < eq_len and eq[i + 1] != '+' and eq[i + 1] != '-'
and eq[i + 1] != '*' and eq[i + 1] != 'X'):
Printer.error("format")
try:
# case ^
if (eq[i] == '^'):
if (eq[i - 1] != 'X'):
Printer.error("format")
if (not eq[i + 1].isdigit()):
Printer.error("degree")
while (i + 1 < eq_len and eq[i + 1].isdigit()):
i += 1
if (i + 1 == eq_len and not eq[i].isdigit()):
Printer.error("format")
elif (i + 1 < eq_len and eq[i + 1] != '+'
and eq[i + 1] != '-'):
Printer.error("format")
# case double operator
if (self.is_operator(eq[i]) and self.is_operator(eq[i - 1])):
Printer.error("format")
# case / and . with else than digit around
if ((eq[i] == '/' or eq[i] == '.')
and (not self.is_number_or_x(eq[i + 1])
or not self.is_number_or_x(eq[i - 1]))):
Printer.error("format")
except Exception:
Printer.error("format")
i += 1
# case last char is operator
if (self.is_operator(eq[i - 1])):
Printer.error("format")
