From: Mark Wooding <mdw@distorted.org.uk>
Date: Sun, 24 Nov 2019 15:11:46 +0000 (+0000)
Subject: catacomb.c, util.c: Publish negative constants correctly.
X-Git-Url: https://git.distorted.org.uk/~mdw/pyke/commitdiff_plain/2ec562f15a095c23bc7c16199ea7428007b7b8ec?hp=2ec562f15a095c23bc7c16199ea7428007b7b8ec

catacomb.c, util.c: Publish negative constants correctly.

The various `KERR_...' constants and `PGEN_ABORT' are canonically
negative integers, but weren't published correctly.  Add a flags word to
`struct nameval' to identify constants which should really be signed,
and some fancy footwork to convert unsigned integers back to negative
values without upsetting C.  Adjust the `C' macro to spot negative
constants and mark them specially.

Not all is well.  In particular, the `KEXP_...' constants should /not/
be published as signed values, even if `time_t' is signed on the target
platform, because the Python bindings handle them exclusively as
`unsigned long' values.  To make this work, also introduce `CF' which
allows us to set the flags explicitly, and use it for `KEXP_...'.
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