mirror of https://github.com/morpheus65535/bazarr
142 lines
4.1 KiB
Python
142 lines
4.1 KiB
Python
from __future__ import unicode_literals
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# Type Conversions. to_type. All must return PyJs subclass instance
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from .simplex import *
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def to_primitive(self, hint=None):
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if is_primitive(self):
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return self
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if hint is None and (self.Class == 'Number' or self.Class == 'Boolean'):
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# favour number for Class== Number or Boolean default = String
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hint = 'Number'
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return self.default_value(hint)
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def to_boolean(self):
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typ = Type(self)
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if typ == 'Boolean': # no need to convert
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return self
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elif typ == 'Null' or typ == 'Undefined': # they are both always false
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return False
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elif typ == 'Number': # false only for 0, and NaN
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return self and self == self # test for nan (nan -> flase)
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elif typ == 'String':
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return bool(self)
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else: # object - always True
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return True
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def to_number(self):
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typ = Type(self)
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if typ == 'Number': # or self.Class=='Number': # no need to convert
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return self
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elif typ == 'Null': # null is 0
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return 0.
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elif typ == 'Undefined': # undefined is NaN
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return NaN
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elif typ == 'Boolean': # 1 for True 0 for false
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return float(self)
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elif typ == 'String':
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s = self.strip() # Strip white space
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if not s: # '' is simply 0
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return 0.
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if 'x' in s or 'X' in s[:3]: # hex (positive only)
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try: # try to convert
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num = int(s, 16)
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except ValueError: # could not convert -> NaN
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return NaN
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return float(num)
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sign = 1 # get sign
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if s[0] in '+-':
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if s[0] == '-':
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sign = -1
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s = s[1:]
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if s == 'Infinity': # Check for infinity keyword. 'NaN' will be NaN anyway.
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return sign * Infinity
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try: # decimal try
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num = sign * float(s) # Converted
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except ValueError:
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return NaN # could not convert to decimal > return NaN
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return float(num)
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else: # object - most likely it will be NaN.
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return to_number(to_primitive(self, 'Number'))
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def to_string(self):
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typ = Type(self)
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if typ == 'String':
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return self
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elif typ == 'Null':
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return 'null'
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elif typ == 'Undefined':
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return 'undefined'
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elif typ == 'Boolean':
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return 'true' if self else 'false'
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elif typ == 'Number': # or self.Class=='Number':
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return js_dtoa(self)
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else: # object
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return to_string(to_primitive(self, 'String'))
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def to_object(self, space):
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typ = Type(self)
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if typ == 'Object':
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return self
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elif typ == 'Boolean': # Unsure ... todo check here
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return space.Boolean.create((self, ), space)
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elif typ == 'Number': # ?
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return space.Number.create((self, ), space)
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elif typ == 'String': # ?
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return space.String.create((self, ), space)
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elif typ == 'Null' or typ == 'Undefined':
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raise MakeError('TypeError',
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'undefined or null can\'t be converted to object')
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else:
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raise RuntimeError()
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def to_int32(self):
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num = to_number(self)
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if is_nan(num) or is_infinity(num):
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return 0
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int32 = int(num) % 2**32
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return int(int32 - 2**32 if int32 >= 2**31 else int32)
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def to_int(self):
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num = to_number(self)
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if is_nan(num):
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return 0
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elif is_infinity(num):
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return 10**20 if num > 0 else -10**20
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return int(num)
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def to_uint32(self):
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num = to_number(self)
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if is_nan(num) or is_infinity(num):
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return 0
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return int(num) % 2**32
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def to_uint16(self):
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num = to_number(self)
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if is_nan(num) or is_infinity(num):
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return 0
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return int(num) % 2**16
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def to_int16(self):
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num = to_number(self)
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if is_nan(num) or is_infinity(num):
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return 0
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int16 = int(num) % 2**16
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return int(int16 - 2**16 if int16 >= 2**15 else int16)
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def cok(self):
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"""Check object coercible"""
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if type(self) in (UNDEFINED_TYPE, NULL_TYPE):
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raise MakeError('TypeError',
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'undefined or null can\'t be converted to object')
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