Message120392
In Python 2.7 and 3.2a3, Modules/_io/textio.c uses signed:1 bitfields.
They have value -1 or 0 in two's complement, but are not used thus here:
gcc complains of <bitfield> = 1 overflow. If the point was that they
are assigned signed values, well, unsigned:1 is promoted to signed int.
I also fix a strange (int) cast doing (truncate flag to int) & 1.
My guess is someone shut up a compiler warning about the above,
by cleaning up in the wrong place. I kept a cast in case that's
not it, and some compiler would get noisy anyway.
There are possibly-signed 1-bit fields Modules/_ctypes/_ctypes_test.c:
struct BITS too, but I don't know what that code is for. It does not
specify signedness of the bitfields, which (as with char) makes it the
compiler's choice. That's usually a bad idea, but maybe that code is
for exploring the compiler? |
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Date |
User |
Action |
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2010-11-04 11:51:20 | hfuru | set | recipients:
+ hfuru |
2010-11-04 11:51:20 | hfuru | set | messageid: <1288871480.25.0.737532033065.issue10310@psf.upfronthosting.co.za> |
2010-11-04 11:51:18 | hfuru | link | issue10310 messages |
2010-11-04 11:51:17 | hfuru | create | |
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