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fix(core): do not subclass range

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micropython on real hw dislikes it for some reason

also it's completely unnecessary
This commit is contained in:
matejcik 2020-11-13 15:53:21 +01:00
parent be9fcf7525
commit e6a1bf840f
2 changed files with 24 additions and 26 deletions
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46
core/src/apps/common/paths.py
View File

@ -12,6 +12,7 @@ if False:
Any,
Callable,
Collection,
Container,
Iterable,
List,
Sequence,
@ -33,25 +34,17 @@ if False:
...
class _FastInclusiveRange(range):
"""Inclusive range with a fast membership test, suitable for PathSchema use.
Micropython's `range` does not implement the `__contains__` method. This makes
checking whether `x in range(BIG_NUMBER)` slow. This class fixes the problem.
In addition, convenience modifications have been made:
* both `min` and `max` belong to the range (so `stop == max + 1`).
* both `min` and `max` must be set, `step` is not allowed (we don't need it and it
would make the `__contains__` method more complex)
"""
class Interval:
"""Helper for testing membership in an interval."""
def __init__(self, min: int, max: int) -> None:
super().__init__(min, max + 1)
self.min = min
self.max = max
def __contains__(self, x: object) -> bool:
if not isinstance(x, int):
return False
return self.start <= x < self.stop
return self.min <= x <= self.max
class PathSchema:
@ -107,9 +100,9 @@ class PathSchema:
}
WILDCARD_RANGES = {
"*": _FastInclusiveRange(0, HARDENED - 1),
"*'": _FastInclusiveRange(HARDENED, 0xFFFF_FFFF),
"**": _FastInclusiveRange(0, 0xFFFF_FFFF),
"*": Interval(0, HARDENED - 1),
"*'": Interval(HARDENED, 0xFFFF_FFFF),
"**": Interval(0, 0xFFFF_FFFF),
}
def __init__(self, pattern: str, slip44_id: Union[int, Iterable[int]]) -> None:
@ -120,8 +113,8 @@ class PathSchema:
if isinstance(slip44_id, int):
slip44_id = (slip44_id,)
self.schema: List[Collection[int]] = []
self.trailing_components: Collection[int] = ()
self.schema: List[Container[int]] = []
self.trailing_components: Container[int] = ()
for component in components:
if component in self.WILDCARD_RANGES:
@ -151,7 +144,7 @@ class PathSchema:
if "-" in component:
# parse as a range
a, b = [parse(s) for s in component.split("-", 1)]
self.schema.append(_FastInclusiveRange(a, b))
self.schema.append(Interval(a, b))
elif "," in component:
# parse as a list of values
@ -193,18 +186,23 @@ class PathSchema:
return item ^ (item & HARDENED)
for component in self.schema:
if isinstance(component, range):
a, b = component.start, component.stop - 1
if isinstance(component, Interval):
a, b = component.min, component.max
components.append(
"[{}-{}]{}".format(
unharden(a), unharden(b), "'" if a & HARDENED else ""
)
)
else:
component_str = ",".join(str(unharden(i)) for i in component)
if len(component) > 1:
# mypy thinks component is a Contanier but we're using it as a Collection.
# Which in practice it is, the only non-Collection is Interval.
# But we're not going to introduce an additional type requirement
# for the sake of __repr__ that doesn't exist in production anyway
collection: Collection[int] = component # type: ignore
component_str = ",".join(str(unharden(i)) for i in collection)
if len(collection) > 1:
component_str = "[" + component_str + "]"
if next(iter(component)) & HARDENED:
if next(iter(collection)) & HARDENED:
component_str += "'"
components.append(component_str)

4
core/tests/test_apps.common.paths.py
View File

@ -41,8 +41,8 @@ class TestPathSchemas(unittest.TestCase):
def assertEqualSchema(self, schema_a, schema_b):
def is_equal(a, b):
if isinstance(a, range) and isinstance(b, range):
return a.start == b.start and a.step == b.step and a.stop == b.stop
if isinstance(a, Interval) and isinstance(b, Interval):
return a.min == b.min and a.max == b.max
return set(a) == set(b)
ensure(