Netscape ENTERPRISE SERVER 6.1, Руководство пользователя

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62 Netscape Enterprise Server NSAPI Programmer’s Guide • April 2002 (Draft)
Using Regular Expressions
The
regex
parameter allows you to use shell expressions to match a string. A shell
expression is a string pattern made up of ordinary characters and any of the types
of pattern sequences listed below.
Backslash (\) is used to quote a character that would otherwise be considered part
of a pattern sequence. For example:
"2\*2=4"
The following composite shell expression structures are also recognized:
Table 3-2 Shell Expression Pattern Sequences
Pattern Matches
*
Zero or more characters
?
Exactly one character
$
Matches the end of string
[abc]
Matches one instance of any of the characters enclosed
in
[]
[a-z]
Matches one instance of any character in the specified
range of characters
[^abc]
Matches one instance of any character not in the
enclosed set
Table 3-3
Structure Matches
shexp1
~
shexp2
Matches any string that matches shexp1, unless the
string also matches shexp2. For example, the following
string matches any string that does not end with
.netscape.com
:
"*~*.netscape.com"
(
shexp1
|...|
shexpN
)
Matches any string that matches any one of the shell
expressions enclosed in
()
and separated by
|
.