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55 Commits

Author SHA1 Message Date
simonb
6f6fe2f3ad Spell occurred correctly. 2001-04-25 02:33:08 +00:00
christos
a66a2e0ad0 remove redundant declaration of yyparse 2001-02-04 19:51:14 +00:00
jdolecek
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
jdolecek
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
thorpej
401ea1afda The "&" operator has a higer precedence than "|". 2000-10-29 17:16:02 +00:00
jdolecek
c13c5901f2 also credit J.T. Conklin in copyright message 2000-10-27 21:40:02 +00:00
jdolecek
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
jdolecek
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
jdolecek
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
jdolecek
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
kleink
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
hubertf
1cb54f68ac Add 'RETURN VALUE' section header. 2000-08-28 02:11:04 +00:00
mjl
5a14e8cac6 On memory allocation failure, return 3 as per POSIX. (from OpenBSD) 2000-01-14 07:14:41 +00:00
drochner
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
christos
cdd6e9ea70 cast is*() to unsigned char 1998-11-04 14:11:12 +00:00
mycroft
ee9e50eacb Be more retentive about use of NOTREACHED and noreturn. 1998-07-28 11:41:40 +00:00
mycroft
1381f68431 Delint. 1998-07-28 05:15:46 +00:00
mycroft
ac70c0c5ed Slight code reduction. 1998-07-27 17:55:17 +00:00
mycroft
0e2f9ea923 __AUDIT__ cleanup. 1998-07-27 17:06:48 +00:00
enami
c3872193cf Fix .Nm usage. 1997-10-20 08:50:59 +00:00
christos
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
christos
1ebc470e07 Fix compiler warnings; add WARNS=1 1997-07-20 17:32:57 +00:00
cgd
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
jtc
528957a005 Winning Strategies has placed this code into the Public Domain 1995-04-28 23:19:22 +00:00
cgd
49f0ad8601 convert to new RCS id conventions. 1995-03-21 09:01:59 +00:00
mycroft
4c34be6b52 Clean up deleted files. 1995-03-01 00:00:00 +00:00
mycroft
abe60a1e07 Clean up deleted files. 1994-07-16 00:17:15 +00:00
jtc
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
cgd
00dc18214f don't forget a cast, and thereby fix the regexp problems on big-endian machines 1994-07-10 23:51:11 +00:00
jtc
42f840d29d Fix spelling error in Copyright notice 1994-01-29 01:43:03 +00:00
jtc
e04c8e0705 Fix spelling errors. 1994-01-11 02:10:48 +00:00
jtc
bff56be25a Fix insignificant memory leak. 1993-11-16 23:08:49 +00:00
jtc
5ce3d664fb Use new POSIX.2 compatible regex routines in C library instead of -lgnuregex. 1993-11-11 01:29:52 +00:00
jtc
441c51a9d5 Document the new, less restrictive, behavior of the matching operator. 1993-10-04 22:06:59 +00:00
jtc
d143e6f175 Allow expressions like "expr 'ABC' : '^.*$' to work as is done in other 
expr implementations.
 1993-10-04 21:57:27 +00:00
jtc
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
jtc
a5102d01b8 Document the fact that expr is POSIX.2 compliant. 1993-08-28 04:21:00 +00:00
jtc
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
jtc
04b0d37be1 Document that string comparisons are done using the locale specific 
collation sequence.
 1993-08-16 23:22:49 +00:00
jtc
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
mycroft
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
mycroft
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
mycroft
11ad3ef4f1 Makefile 1993-08-02 17:15:26 +00:00
jtc
78bf9d408e Add a manual page. 1993-07-20 20:16:25 +00:00
jtc
6a320fc0a3 Now truely POSIX 1003.2 (D11.2) compliant. 1993-07-20 01:10:55 +00:00
jtc
aabfaec2f5 Don't coerce strings to int in comparisons. 1993-07-20 00:52:57 +00:00
jtc
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
jtc
68028dc2de Updated to POSIX regular expression routines. 
(Previous checkin was aborted by stray ^C)
 1993-06-14 19:59:07 +00:00
jtc
3aef70381b Use POSIX regular expression routines. 
Remove TODO file, as I've allready done everything that there was to do.
 1993-06-14 19:56:06 +00:00
cgd
ac2edf58ea update for latest version of patches from jtconklin@kaleida.com 1993-06-05 22:25:44 +00:00