You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
86 lines
3.1 KiB
86 lines
3.1 KiB
"""
|
|
exp_translate routine:
|
|
It takes a single line of JS code and returns a SINGLE line of Python code.
|
|
Note var is not present here because it was removed in previous stages. Also remove this useless void keyword
|
|
If case of parsing errors it must return a pos of error.
|
|
1. Convert all assignment operations to put operations, this may be hard :( DONE, wasn't that bad
|
|
2. Convert all gets and calls to get and callprop.
|
|
3. Convert unary operators like typeof, new, !, delete, ++, --
|
|
Delete can be handled by replacing last get method with delete.
|
|
4. Convert remaining operators that are not handled by python:
|
|
&&, || <= these should be easy simply replace && by and and || by or
|
|
=== and !==
|
|
comma operator , in, instanceof and finally :?
|
|
|
|
|
|
NOTES:
|
|
Strings and other literals are not present so each = means assignment
|
|
"""
|
|
from __future__ import print_function
|
|
|
|
from utils import *
|
|
from jsparser import *
|
|
|
|
|
|
def exps_translator(js):
|
|
#Check () {} and [] nums
|
|
ass = assignment_translator(js)
|
|
|
|
|
|
# Step 1
|
|
def assignment_translator(js):
|
|
sep = js.split(',')
|
|
res = sep[:]
|
|
for i, e in enumerate(sep):
|
|
if '=' not in e: # no need to convert
|
|
continue
|
|
res[i] = bass_translator(e)
|
|
return ','.join(res)
|
|
|
|
|
|
def bass_translator(s):
|
|
# I hope that I will not have to fix any bugs here because it will be terrible
|
|
if '(' in s or '[' in s:
|
|
converted = ''
|
|
for e in bracket_split(s, ['()', '[]'], strip=False):
|
|
if e[0] == '(':
|
|
converted += '(' + bass_translator(e[1:-1]) + ')'
|
|
elif e[0] == '[':
|
|
converted += '[' + bass_translator(e[1:-1]) + ']'
|
|
else:
|
|
converted += e
|
|
s = converted
|
|
if '=' not in s:
|
|
return s
|
|
ass = reversed(s.split('='))
|
|
last = ass.next()
|
|
res = last
|
|
for e in ass:
|
|
op = ''
|
|
if e[-1] in OP_METHODS: #increment assign like +=
|
|
op = ', "' + e[-1] + '"'
|
|
e = e[:-1]
|
|
cand = e.strip(
|
|
'() ') # (a) = 40 is valid so we need to transform '(a) ' to 'a'
|
|
if not is_property_accessor(cand): # it is not a property assignment
|
|
if not is_lval(cand) or is_internal(cand):
|
|
raise SyntaxError('Invalid left-hand side in assignment')
|
|
res = 'var.put(%s, %s%s)' % (cand.__repr__(), res, op)
|
|
elif cand[-1] == ']': # property assignment via []
|
|
c = list(bracket_split(cand, ['[]'], strip=False))
|
|
meth, prop = ''.join(c[:-1]).strip(), c[-1][1:-1].strip(
|
|
) #this does not have to be a string so dont remove
|
|
#() because it can be a call
|
|
res = '%s.put(%s, %s%s)' % (meth, prop, res, op)
|
|
else: # Prop set via '.'
|
|
c = cand.rfind('.')
|
|
meth, prop = cand[:c].strip(), cand[c + 1:].strip('() ')
|
|
if not is_lval(prop):
|
|
raise SyntaxError('Invalid left-hand side in assignment')
|
|
res = '%s.put(%s, %s%s)' % (meth, prop.__repr__(), res, op)
|
|
return res
|
|
|
|
|
|
if __name__ == '__main__':
|
|
print(bass_translator('3.ddsd = 40'))
|