#!/usr/bin/env python3
# The Universe 2 Online Calculator v1.00
# is licensed under the SubText License v1.0.
import cgi, re, os
eqr = cgi.FieldStorage().getvalue('eqr')
eqr = str(eqr)
eqr = eqr.replace('x', '*')
eqr = eqr.replace('X', '*')
eqr = eqr.replace('(', '')
eqr = eqr.replace(')', '')
eqr = eqr.replace('$', '')
eqr = re.sub(r'[a-zA-Z]', '', eqr)
ocver = '1.00'
print('Content-Type: text/html;charset=utf-8')
print('')
print('Online Calculator')
print('Welcome to the Universe 2 online calculator v' + ocver + '.')
print('Enter an equation in the box below and press "Calculate".')
print('______________')
if not eqr == '':
if len(eqr) > 12:
print('You may not attempt calculations larger than twelve characters.')
elif '**' in eqr:
print('This operation could cause a very large calculation delay and slow down the whole server,
therefore it has been disabled.')
else:
try:
calcresult = str(eval(eqr)).replace('True', 'True').replace('False', 'False')
print('Your result is:
')
except:
print('Unable to calculate.
Invalid or unrecognized equation:
')
else:
print('No equation.')
print('')