suspect-devices/circuitpython/lib/utils, branch 5.3.0-rc.0

protocols: Allow them to be (optionally) type-safe

2019-12-04T15:29:57+00:00

Protocols are nice, but there is no way for C code to verify whether a type's "protocol" structure actually implements some particular protocol. As a result, you can pass an object that implements the "vfs" protocol to one that expects the "stream" protocol, and the opposite of awesomeness ensues. This patch adds an OPTIONAL (but enabled by default) protocol identifier as the first member of any protocol structure. This identifier is simply a unique QSTR chosen by the protocol designer and used by each protocol implementer. When checking for protocol support, instead of just checking whether the object's type has a non-NULL protocol field, use `mp_proto_get` which implements the protocol check when possible. The existing protocols are now named: protocol_framebuf protocol_i2c protocol_pin protocol_stream protocol_spi protocol_vfs (most of these are unused in CP and are just inherited from MP; vfs and stream are definitely used though) I did not find any crashing examples, but here's one to give a flavor of what is improved, using `micropython_coverage`. Before the change, the vfs "ioctl" protocol is invoked, and the result is not intelligible as json (but it could have resulted in a hard fault, potentially): >>> import uos, ujson >>> u = uos.VfsPosix('/tmp') >>> ujson.load(u) Traceback (most recent call last): File "", line 1, in ValueError: syntax error in JSON After the change, the vfs object is correctly detected as not supporting the stream protocol: >>> ujson.load(p) Traceback (most recent call last): File "", line 1, in OSError: stream operation not supported

Refine _bleio

2019-10-22T01:57:03+00:00

This PR refines the _bleio API. It was originally motivated by the addition of a new CircuitPython service that enables reading and modifying files on the device. Moving the BLE lifecycle outside of the VM motivated a number of changes to remove heap allocations in some APIs. It also motivated unifying connection initiation to the Adapter class rather than the Central and Peripheral classes which have been removed. Adapter now handles the GAP portion of BLE including advertising, which has moved but is largely unchanged, and scanning, which has been enhanced to return an iterator of filtered results. Once a connection is created (either by us (aka Central) or a remote device (aka Peripheral)) it is represented by a new Connection class. This class knows the current connection state and can discover and instantiate remote Services along with their Characteristics and Descriptors. Relates to #586

More size_t usage

2019-08-27T19:49:46+00:00

lib/utils/printf: Exclude __GI_vsnprintf alias for gcc 9 and above.

2019-05-11T05:31:40+00:00

See issue #4457.

Hide the traceback for the ReloadException.

2019-05-08T21:53:20+00:00

Many users think it's an error when it's us simply stopping the code.

Set file for the main source file (e.g. code.py, main.py)

2019-02-21T03:37:29+00:00

Support print("", flush=True)

2019-02-16T00:53:19+00:00

Fixes #1127

Fix output overflow and make help translatable

2018-11-10T00:41:08+00:00

Add i2cslave.I2CSlave bindings

2018-08-16T15:11:20+00:00

Two fixes and translate more strings.

2018-08-09T20:29:30+00:00

* Fix finding translations with escaped characters. * Add back \r to translations since its needed by screen.