src/bin/sh/arith.y, branch main

sh: Import arithmetic expression code from dash.

2011-02-08T23:18:06Z

New features: * proper lazy evaluation of || and && * ?: ternary operator * executable is considerably smaller (8K on i386) because lex and yacc are no longer used Differences from dash: * arith_t instead of intmax_t * imaxdiv() not used * unset or null variables default to 0 * let/exp builtin (undocumented, will probably be removed later) Obtained from: dash

sh: Use stalloc for arith variable names.

2010-04-25T20:43:19Z

This is simpler than the custom memory tracker I added earlier, and is also needed by the dash arith code I plan to import.

sh: arith: Return only 0 and 1 from && and ||.

2009-12-30T15:59:40Z

This agrees with C, POSIX and other shells.

sh: Various warning fixes (from WARNS=6 NO_WERROR=1):

2009-12-27T18:04:05Z

- const - initializations to silence -Wuninitialized (it was safe anyway) - remove nested extern declarations - rename "index" locals to "idx"

sh: Constify various strings.

2009-12-24T18:41:14Z

Most of this is adding const keywords, but setvar() in var.c had to be changed somewhat more.

- Fix bugs where the value of arithmetic expansion$((...)) was trucated

2008-04-27T20:46:45Z

to type int. - Change the type used for arithmetic expansion to intmax_t (ie. 64 bit on all currently supported FreeBSD architectures). SUSv3 requires at least type long but allows for larger types. Other shells (eg. bash, zsh, NetBSD's sh) do that too. PR: 122659 Submitted by: Jaakko Heinonen (minor modifications by me)

cvs -d stefanf@ncvs.FreeBSD.org:/home/ncvs

2005-08-13T07:54:23Z

Include for a sprintf() prototype.

2004-05-24T10:11:31Z

Approved by: das (mentor)

Remove clause 3 from the UCB licenses.

2004-04-06T20:06:54Z

OK'ed by: imp, core

Fix testing of arith_assign() value for $((a=15)).

2003-09-07T10:14:56Z

Submitted by: Enache Adrian