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string.py
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154 lines (126 loc) · 3.95 KB
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import pixie.vm.rt as rt
from pixie.vm.object import Object, Type, affirm
from pixie.vm.code import extend, as_var, wrap_fn
from pixie.vm.primitives import nil, true, false
from pixie.vm.numbers import Integer, _add
import pixie.vm.stdlib as proto
import pixie.vm.util as util
from rpython.rlib.rarithmetic import intmask, r_uint
from pixie.vm.libs.pxic.util import add_marshall_handlers
class String(Object):
_type = Type(u"pixie.stdlib.String")
def type(self):
return String._type
def __init__(self, s):
#assert isinstance(s, unicode)
self._str = s
@extend(proto._str, String)
def _str(x):
return x
@extend(proto._repr, String)
def _repr(self):
res = u""
assert isinstance(self, String)
for c in self._str:
if c == "\"":
res += u"\\\""
elif c == "\n":
res += u"\\n"
elif c == "\t":
res += u"\\t"
elif c == "\b":
res += u"\\b"
elif c == "\f":
res += u"\\f"
elif c == "\r":
res += u"\\r"
else:
res += c
return rt.wrap(u"\"" + res + u"\"")
@extend(proto._count, String)
def _count(self):
assert isinstance(self, String)
return rt.wrap(len(self._str))
@extend(proto._nth, String)
def _nth(self, idx):
assert isinstance(self, String)
i = idx.int_val()
if 0 <= i < len(self._str):
return Character(ord(self._str[i]))
affirm(False, u"Index out of Range")
@extend(proto._nth_not_found, String)
def _nth_not_found(self, idx, not_found):
assert isinstance(self, String)
i = idx.int_val()
if 0 <= i < len(self._str):
return Character(ord(self._str[i]))
return not_found
@extend(proto._eq, String)
def _eq(self, v):
assert isinstance(self, String)
if not isinstance(v, String):
return false
return true if self._str == v._str else false
class Character(Object):
_type = Type(u"pixie.stdlib.Character")
_immutable_fields_ = ["_char_val"]
def type(self):
return Character._type
def __init__(self, i):
assert isinstance(i, int)
self._char_val = i
def char_val(self):
return self._char_val
@wrap_fn
def write_char(obj):
assert isinstance(obj, Character)
return rt.wrap(obj._char_val)
@wrap_fn
def read_char(obj):
return Character(obj.int_val())
add_marshall_handlers(Character._type, write_char, read_char)
@extend(proto._str, Character)
def _str(self):
assert isinstance(self, Character)
return rt.wrap(u"" + unichr(self.char_val()))
@extend(proto._repr, Character)
def _repr(self):
assert isinstance(self, Character)
cv = self.char_val()
if cv < 128:
return rt.wrap(u"\\"+unicode(chr(cv)))
hexv = rt.name(rt.bit_str(rt.wrap(self.char_val()), rt.wrap(4)))
return rt.wrap(u"\\u" + u"0" * (4 - len(hexv)) + hexv)
@extend(proto._eq, Character)
def _eq(self, obj):
assert isinstance(self, Character)
if self is obj:
return true
if not isinstance(obj, Character):
return false
return true if self.char_val() == obj.char_val() else false
@extend(proto._hash, Character)
def _hash(self):
return rt.wrap(intmask(util.hash_int(r_uint(self.char_val()))))
@as_var("char")
def char(val):
affirm(isinstance(val, Integer), u"First argument must be an Integer")
return Character(val.int_val())
@extend(_add, Character._type, Integer._type)
def _add(a, b):
assert isinstance(a, Character) and isinstance(b, Integer)
return rt._add(rt.wrap(a.char_val()), b)
@extend(_add, Character._type, Character._type)
def _add(a, b):
assert isinstance(a, Character) and isinstance(b, Character)
return Character(a.char_val() + b.char_val())
@extend(proto._name, String)
def _name(self):
return self
@extend(proto._namespace, String)
def _namespace(self):
return nil
@extend(proto._hash, String)
def _hash(self):
assert isinstance(self, String)
return rt.wrap(intmask(util.hash_unencoded_chars(self._str)))