CVS log for src/bin/ksh/expr.c

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Default branch: MAIN

Fix core dump caused by
	ksh -c '(i=10; echo $((++-+++i)))'
reported by Steffen Nurpmeso (not on a NetBSD list or PR).

Seems pointless to fix just one of the bugs in this thing, but this one was
easy enough (and stupid enough).   (The "i=10" part is unimportant, as is the sub-shell).

Ooops, restore accidently removed files from merge mishap

Sync with HEAD

Sync with HEAD

Stop using the register keyword in ksh(1)

ksh also does some strange things with it, like put it in argument lists.

No functional change intended.

PR bin/53237 ksh: remove register keyword by Nia Alarie

Kill enough K&R cruft to build with clang again.

ksh: Upgrade to C99 <stdbool.h>

This shell already used C99 functions.

Don't use non-literal format strings.

warns=3
- remove param names from function decls
- sprinkle const
- rename shadowed variables
- XXX: there is a lot of fishy __UNCONST going on.

Fixed wrong use of the <ctype.h> functions by adding an explicit conversion
to unsigned char. Approved by christos.

Cleanup of ksh memory handling from OpenBSD, via Stefan Krueger in PR 24962.
Should also fix:
PR 8153
PR 13301
PR 15256
PR 25084

Add NetBSD RCS Ids.

Pull up to last week's -current.

make this build with -Werror

resolve conflicts

Import pdksh V5.2.14.
Includes lots of bugfixes.

RCS ID Police

import pdksh 5.2.8

Initial revision