| regex.3 (108037) | regex.3 (108087) |
|---|---|
| 1.\" Copyright (c) 1992, 1993, 1994 Henry Spencer. 2.\" Copyright (c) 1992, 1993, 1994 3.\" The Regents of the University of California. All rights reserved. 4.\" 5.\" This code is derived from software contributed to Berkeley by 6.\" Henry Spencer. 7.\" 8.\" Redistribution and use in source and binary forms, with or without --- 20 unchanged lines hidden (view full) --- 29.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34.\" SUCH DAMAGE. 35.\" 36.\" @(#)regex.3 8.4 (Berkeley) 3/20/94 | 1.\" Copyright (c) 1992, 1993, 1994 Henry Spencer. 2.\" Copyright (c) 1992, 1993, 1994 3.\" The Regents of the University of California. All rights reserved. 4.\" 5.\" This code is derived from software contributed to Berkeley by 6.\" Henry Spencer. 7.\" 8.\" Redistribution and use in source and binary forms, with or without --- 20 unchanged lines hidden (view full) --- 29.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34.\" SUCH DAMAGE. 35.\" 36.\" @(#)regex.3 8.4 (Berkeley) 3/20/94 |
| 37.\" $FreeBSD: head/lib/libc/regex/regex.3 108037 2002-12-18 12:45:11Z ru $ | 37.\" $FreeBSD: head/lib/libc/regex/regex.3 108087 2002-12-19 09:40:28Z ru $ |
| 38.\" 39.Dd October 2, 2002 40.Dt REGEX 3 41.Os 42.Sh NAME 43.Nm regcomp , 44.Nm regexec , 45.Nm regerror , --- 59 unchanged lines hidden (view full) --- 105.Fa pattern 106string, 107subject to the flags in 108.Fa cflags , 109and places the results in the 110.Ft regex_t 111structure pointed to by 112.Fa preg . | 38.\" 39.Dd October 2, 2002 40.Dt REGEX 3 41.Os 42.Sh NAME 43.Nm regcomp , 44.Nm regexec , 45.Nm regerror , --- 59 unchanged lines hidden (view full) --- 105.Fa pattern 106string, 107subject to the flags in 108.Fa cflags , 109and places the results in the 110.Ft regex_t 111structure pointed to by 112.Fa preg . |
| 113.Fa Cflags | 113The 114.Fa cflags 115argument |
| 114is the bitwise OR of zero or more of the following flags: 115.Bl -tag -width REG_EXTENDED 116.It Dv REG_EXTENDED 117Compile modern 118.Pq Dq extended 119REs, 120rather than the obsolete 121.Pq Dq basic --- 542 unchanged lines hidden (view full) --- 664The back-reference code is subtle and doubts linger about its correctness 665in complex cases. 666.Pp 667The 668.Fn regexec 669function 670performance is poor. 671This will improve with later releases. | 116is the bitwise OR of zero or more of the following flags: 117.Bl -tag -width REG_EXTENDED 118.It Dv REG_EXTENDED 119Compile modern 120.Pq Dq extended 121REs, 122rather than the obsolete 123.Pq Dq basic --- 542 unchanged lines hidden (view full) --- 666The back-reference code is subtle and doubts linger about its correctness 667in complex cases. 668.Pp 669The 670.Fn regexec 671function 672performance is poor. 673This will improve with later releases. |
| 672.Fa Nmatch | 674The 675.Fa nmatch 676argument |
| 673exceeding 0 is expensive; 674.Fa nmatch 675exceeding 1 is worse. 676The 677.Fn regexec 678function 679is largely insensitive to RE complexity 680.Em except --- 43 unchanged lines hidden --- | 677exceeding 0 is expensive; 678.Fa nmatch 679exceeding 1 is worse. 680The 681.Fn regexec 682function 683is largely insensitive to RE complexity 684.Em except --- 43 unchanged lines hidden --- |