subversion-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Branko ─îibej <>
Subject Re: [PATCH] swig-py svn_stream_t read() glue
Date Sun, 07 Jan 2018 15:32:21 GMT
On 07.01.2018 16:17, Troy Curtis Jr wrote:
> On Wed, Jan 3, 2018 at 10:55 PM Daniel Shahaf <>
> wrote:
>> svn_swig_py_make_stream() is a function that wraps a PyObject in an
>> svn_stream_t.  Its read implementation, read_handler_pyio(), just calls
>> the PyObject's .read() method.
>> According to <
>>> ,
>> the read() method of "raw" file-like objects makes only one read(2)
>> syscall, and so may return fewer bytes than were requested.  (The py3
>> docs are similar.)
> Probably in practice the passed in objects are one of the buffered types
> where the read() behaves as this code obviously expected, which is likely
> why this hasn't been noticed before.  However, we can't actually *know*
> that, and anything with a read() method would actually be perfectly valid.
> So it seems like a good patch to me.

I agree. Though not buffered streams but files; reading from a file will
always behave as a full read whilst reading from a socket or pipe or
fifo will not.

Anyway +1 for the patch. The full-read functionality is simulated at the
stream API implementation level if there's no specific full-read function.

-- Brane

View raw message