3b932d2fe1
Fix the operator precedence list to match reality. Operators were incorrectly
...
grouped there.
2001-05-07 10:14:43 +00:00
64e6a11adc
Various cleanups/fixes.
...
Change the add/subtract overflow checks to use an unsigned to do the op
and then cast back into the signed var to check the signs.
Make multiply shortcut on either right or left being 0.
Make multiply's overflow test not fail on simple cases like 1 * -1
Make the multiple overflow test pass all the regress tests.
2001-05-06 06:20:39 +00:00
a7755cce7c
Various changes to fix bugs in PR bin/12838.
...
Make sure all precendence is spelled out correctly (comparison does not
have the same level as the arithmetic operators..)
Break the arithemtic operators into 2 classes (+- are lower than */%)
Restructure the arithmetic code into a function either class above can call.
Finally, add a whole suite of regression tests (checked in separately) which
the previous code failed on 3 of them.
2001-05-05 06:57:57 +00:00
6f6fe2f3ad
Spell occurred correctly.
2001-04-25 02:33:08 +00:00
a66a2e0ad0
remove redundant declaration of yyparse
2001-02-04 19:51:14 +00:00
9ad5bf10de
list parenthesis usage similar way as other operators
...
document operator precedence
rename section BUGS to COMPATIBILITY, add paragraph about -- handling
2000-10-30 16:20:12 +00:00
5888f4d21c
add a hack to properly handle '--' as first argument -
...
it's ignored if it would cause syntax error, otherwise treated as common
string; this is so that both 'expr -- : .' and 'expr -- foo : .' works
This addresses standards/11230 by Ben Harris.
while here, make all global variables but main() static, use const more
2000-10-30 14:55:02 +00:00
401ea1afda
The "&" operator has a higer precedence than "|".
2000-10-29 17:16:02 +00:00
c13c5901f2
also credit J.T. Conklin in copyright message
2000-10-27 21:40:02 +00:00
fb2525abf5
fix operator precedence - | or & have lower priority than
...
arithmetic operations, compare, or :
This should fix bin/11318 by Love <lha@stacken.kth.se>
2000-10-26 23:10:21 +00:00
fd6eeb2e1d
in regexp handling code, fix the format passed to asprintf() to be
...
actually in intended form - use "%.*s" and not incorrect "%*s"
Bug found by Launey Thomas <ljt@alum.mit.edu> and reported in private e-mail.
2000-09-29 17:49:21 +00:00
a82fc402d8
Fix bug in regexp handling, caused not quite complete conversion
...
from old expr.c. This fixes PR # 11060.
While here, convert the code to use asprintf() instead of strdup()
followed by truncating of new string and move definition of errstr
to block where it's used.
2000-09-21 20:32:24 +00:00
3a4441e3d4
reimplement expr using lexical parser generated by yacc
...
highlights:
* / is treated correctly depending upon context (addresses PR # 10995)
* use 64 bit arithmetic, so expr is able to process integer values from
-(2**63) to (2**63 - 1)
* checks for integer over- & underflows added
* error messages improved, more error checking added
add AUTHOR section to manpage
add BUGS section, and mention possible drawbacks with other expr implementations
XXX the old expr treated empty string in arithmetic expressions as if it was 0
XXX this behaviour has been retained
2000-09-19 17:20:00 +00:00
2caf6aacdd
For commands and utilities, use EXIT STATUS rather than RETURN VALUES as
...
appropriate (and documented in mdoc(7)).
2000-09-04 07:30:07 +00:00
1cb54f68ac
Add 'RETURN VALUE' section header.
2000-08-28 02:11:04 +00:00
5a14e8cac6
On memory allocation failure, return 3 as per POSIX. (from OpenBSD)
2000-01-14 07:14:41 +00:00
85cbf55d16
Since our gcc doesn't warn about NULL format strings anymore, we can
...
fix the incorrect err(1, "%s", "") et al.
Closes PR bin/7592 by cgd.
1999-11-09 15:06:30 +00:00
cdd6e9ea70
cast is*() to unsigned char
1998-11-04 14:11:12 +00:00
ee9e50eacb
Be more retentive about use of NOTREACHED and noreturn.
1998-07-28 11:41:40 +00:00
1381f68431
Delint.
1998-07-28 05:15:46 +00:00
ac70c0c5ed
Slight code reduction.
1998-07-27 17:55:17 +00:00
0e2f9ea923
__AUDIT__ cleanup.
1998-07-27 17:06:48 +00:00
c3872193cf
Fix .Nm usage.
1997-10-20 08:50:59 +00:00
23edbe3557
Remove WARNS=1 from all the subdirectory Makefiles, and add it to Makefile.inc
...
now that all /bin has been cleaned.
1997-07-20 22:36:20 +00:00
1ebc470e07
Fix compiler warnings; add WARNS=1
1997-07-20 17:32:57 +00:00
ad8b41fa2a
don't spew an error message if setlocale(LC_ALL, ""); fails. This is for
...
consistency with other programs, and because currently it can never
actually succeeed if LANG is set to something other than "C". Sent
in by me in PR 2486, approved by jtc).
1996-06-04 20:41:15 +00:00
528957a005
Winning Strategies has placed this code into the Public Domain
1995-04-28 23:19:22 +00:00
49f0ad8601
convert to new RCS id conventions.
1995-03-21 09:01:59 +00:00
4c34be6b52
Clean up deleted files.
1995-03-01 00:00:00 +00:00
abe60a1e07
Clean up deleted files.
1994-07-16 00:17:15 +00:00
b9e9314bd7
Re-implemented with a recursive descent parser.
...
Fixed subtle bug wrt. comparing integers when either one hasn't been
coersed from a string --- while avoiding an even subtler bug found in
GNU expr.
1994-07-16 00:17:03 +00:00
00dc18214f
don't forget a cast, and thereby fix the regexp problems on big-endian machines
1994-07-10 23:51:11 +00:00
42f840d29d
Fix spelling error in Copyright notice
1994-01-29 01:43:03 +00:00
e04c8e0705
Fix spelling errors.
1994-01-11 02:10:48 +00:00
bff56be25a
Fix insignificant memory leak.
1993-11-16 23:08:49 +00:00
5ce3d664fb
Use new POSIX.2 compatible regex routines in C library instead of -lgnuregex.
1993-11-11 01:29:52 +00:00
441c51a9d5
Document the new, less restrictive, behavior of the matching operator.
1993-10-04 22:06:59 +00:00
d143e6f175
Allow expressions like "expr 'ABC' : '^.*$' to work as is done in other
...
expr implementations.
1993-10-04 21:57:27 +00:00
74b68a49cf
Fix grammar to eliminate support for unary minus expressions -- they
...
weren't supported, they aren't standard, and they caused expr to dump
core.
1993-09-14 22:45:57 +00:00
a5102d01b8
Document the fact that expr is POSIX.2 compliant.
1993-08-28 04:21:00 +00:00
3ed5680e46
Use err() routine for error messages.
...
If string does not match \( \) subexpression, return a null string.
1993-08-17 16:01:23 +00:00
04b0d37be1
Document that string comparisons are done using the locale specific
...
collation sequence.
1993-08-16 23:22:49 +00:00
e9c8ee33b0
expr is supposed to do string comparisons using the locale specific
...
collation sequence, so use strcoll instead of strcmp.
1993-08-16 23:20:22 +00:00
57b5a6be2d
Oops. This one does need a single-entry SRCS, because it's generated at
...
compile time. Lose.
1993-08-06 01:20:44 +00:00
210cab4541
Add RCS identifiers, remove some completely useless RCS logs and patchkit
...
headers, and a few other insignificant changes.
1993-08-02 17:18:41 +00:00
11ad3ef4f1
Makefile
1993-08-02 17:15:26 +00:00
78bf9d408e
Add a manual page.
1993-07-20 20:16:25 +00:00
6a320fc0a3
Now truely POSIX 1003.2 (D11.2) compliant.
1993-07-20 01:10:55 +00:00
aabfaec2f5
Don't coerce strings to int in comparisons.
1993-07-20 00:52:57 +00:00
476e1b5964
integer arguments were not coerced to strings for the `:' operator.
...
bad things: core dumps, etc. will happen if integer values make it
up the parse tree.
1993-07-20 00:29:41 +00:00
jdolecek