def _ll_strhash(s):
# unlike CPython, there is no reason to avoid to return -1
# but our malloc initializes the memory to zero, so we use zero as the
# special non-computed-yet value. Also, jit.conditional_call_elidable
# always checks for zero, for now.
x = _hash_string(s.chars)
if x == 0:
x = 29872897
s.hash = x
return x
def ll_strhash(s):
# unlike CPython, there is no reason to avoid to return -1
# but our malloc initializes the memory to zero, so we use zero as the
# special non-computed-yet value.
if not s:
return 0
x = s.hash
if x == 0:
x = _hash_string(s.chars)
if x == 0:
x = 29872897
s.hash = x
return x
def ll_strhash(s):
# unlike CPython, there is no reason to avoid to return -1
# but our malloc initializes the memory to zero, so we use zero as the
# special non-computed-yet value.
if not s:
return 0
x = s.hash
if x == 0:
x = _hash_string(s.chars)
if x == 0:
x = 29872897
s.hash = x
return x
def test_compute_hash():
from rpython.rlib.objectmodel import _hash_string, _hash_float, _hash_tuple
assert compute_hash("Hello") == _hash_string("Hello")
assert compute_hash(7) == 7
assert compute_hash(-3.5) == _hash_float(-3.5)
assert compute_hash(None) == 0
assert compute_hash(("world", None, 7)) == _hash_tuple(("world", None, 7))
#
class Foo(object):
def __hash__(self):
return 42
foo = Foo()
h = compute_hash(foo)
assert h == object.__hash__(foo)
assert h == getattr(foo, '__precomputed_identity_hash')
assert compute_hash(None) == 0
def test_compute_hash():
from rpython.rlib.objectmodel import _hash_string, _hash_float, _hash_tuple
assert compute_hash("Hello") == _hash_string("Hello")
assert compute_hash(7) == 7
assert compute_hash(-3.5) == _hash_float(-3.5)
assert compute_hash(None) == 0
assert compute_hash(("world", None, 7)) == _hash_tuple(("world", None, 7))
#
class Foo(object):
def __hash__(self):
return 42
foo = Foo()
h = compute_hash(foo)
assert h == object.__hash__(foo)
assert h == getattr(foo, '__precomputed_identity_hash')
assert compute_hash(None) == 0