src/lib/libc/regex/engine.c, branch stable/15

lib: Remove ancient SCCS tags.

2023-11-27T05:23:28+00:00

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by:		Netflix

libc: Purge unneeded cdefs.h

2023-11-01T22:44:30+00:00

These sys/cdefs.h are not needed. Purge them. They are mostly left-over
from the $FreeBSD$ removal. A few in libc are still required for macros
that cdefs.h defines. Keep those.

Sponsored by:		Netflix
Differential Revision:	https://reviews.freebsd.org/D42385

Remove $FreeBSD$: one-line .c pattern

2023-08-16T17:54:42+00:00

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

libregex: implement \b and \B (word boundary, not word boundary)

2020-12-05T03:16:05+00:00

This is the last of the needed GNU expressions before we can unleash bsdgrep
by default. \b is effectively an agnostic equivalent of \< and \>, while
\B will match every space that isn't making a transition from
nonchar -> char or char -> nonchar.

libregex: implement \` and \' (begin-of-subj, end-of-subj)

2020-12-05T03:13:47+00:00

These are GNU extensions, generally equivalent to ^ and $ except that the
new syntax will not match beginning of line after the first in a multi-line
expression or the end of line before absolute last in a multi-line
expression.

libc: regex: factor out ISBOW/ISEOW macros

2020-12-05T02:23:11+00:00

These will be reused for \b (word boundary, which matches both sides).

No functional change.

lib/libc/regex: fix build with REDEBUG defined

2019-09-24T12:21:01+00:00

Reviewed by:	kevans
Differential Revision:	https://reviews.freebsd.org/D21760

regexec: fix processing multibyte strings.

2018-11-23T15:49:18+00:00

Matcher function incorrectly assumed that moffset that we get from
findmust is in bytes. Fix this by introducing a stepback function,
taking short path if MB_CUR_MAX is 1, and going back byte-by-byte,
checking if we have a legal character sequence otherwise.

PR:		153502
Reviewed by:	pfg, kevans
Approved by:	kib (mentor, implicit)
Differential revision:	https://reviews.freebsd.org/D18297

regex/engine.c: error: variable 'dp' set but not used

2018-07-14T09:29:45+00:00

The issue found with gcc6 build (originally on illumos, confirmed on FreeBSD).
Mark it __unused.

Differential Revision:	https://reviews.freebsd.org/D13109

regex(3): Resolve issues with higher WARNS levels

2018-01-21T04:57:29+00:00

libc is set for WARNS=2, but the incoming libregex will use WARNS=6.
Sprinkle some casts and (void)bc's to alleviate the warnings that come along
with the higher WARNS level.

These 'bc' parameters could be outright removed, but as of right now they
will be used in some parts of libregex land. Silence the warnings instead
rather than flip-flopping.