home *** CD-ROM | disk | FTP | other *** search
- '\"
- '\" Copyright (c) 1993 The Regents of the University of California.
- '\" All rights reserved.
- '\"
- '\" Permission is hereby granted, without written agreement and without
- '\" license or royalty fees, to use, copy, modify, and distribute this
- '\" documentation for any purpose, provided that the above copyright
- '\" notice and the following two paragraphs appear in all copies.
- '\"
- '\" IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
- '\" FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
- '\" ARISING OUT OF THE USE OF THIS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
- '\" CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- '\"
- '\" THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
- '\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
- '\" AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
- '\" ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
- '\" PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- '\"
- '\" $Header: /user6/ouster/tcl/man/RCS/string.n,v 1.1 93/06/16 16:48:24 ouster Exp $ SPRITE (Berkeley)
- '\"
- .so man.macros
- .HS string tcl
- .BS
- '\" Note: do not modify the .SH NAME line immediately below!
- .SH NAME
- string \- Manipulate strings
- .SH SYNOPSIS
- \fBstring \fIoption arg \fR?\fIarg ...?\fR
- .BE
-
- .SH DESCRIPTION
- .PP
- Performs one of several string operations, depending on \fIoption\fR.
- The legal \fIoption\fRs (which may be abbreviated) are:
- .TP
- \fBstring compare \fIstring1 string2\fR
- Perform a character-by-character comparison of strings \fIstring1\fR and
- \fIstring2\fR in the same way as the C \fBstrcmp\fR procedure. Return
- \-1, 0, or 1, depending on whether \fIstring1\fR is lexicographically
- less than, equal to, or greater than \fIstring2\fR.
- .TP
- \fBstring first \fIstring1 string2\fR
- Search \fIstring2\fR for a sequence of characters that exactly match
- the characters in \fIstring1\fR. If found, return the index of the
- first character in the first such match within \fIstring2\fR. If not
- found, return \-1.
- .TP
- \fBstring index \fIstring charIndex\fR
- Returns the \fIcharIndex\fR'th character of the \fIstring\fR
- argument. A \fIcharIndex\fR of 0 corresponds to the first
- character of the string.
- If \fIcharIndex\fR is less than 0 or greater than
- or equal to the length of the string then an empty string is
- returned.
- .TP
- \fBstring last \fIstring1 string2\fR
- Search \fIstring2\fR for a sequence of characters that exactly match
- the characters in \fIstring1\fR. If found, return the index of the
- first character in the last such match within \fIstring2\fR. If there
- is no match, then return \-1.
- .TP
- \fBstring length \fIstring\fR
- Returns a decimal string giving the number of characters in \fIstring\fR.
- .TP
- \fBstring match \fIpattern\fR \fIstring\fR
- See if \fIpattern\fR matches \fIstring\fR; return 1 if it does, 0
- if it doesn't. Matching is done in a fashion similar to that
- used by the C-shell. For the two strings to match, their contents
- must be identical except that the following special sequences
- may appear in \fIpattern\fR:
- .RS
- .IP \fB*\fR 10
- Matches any sequence of characters in \fIstring\fR,
- including a null string.
- .IP \fB?\fR 10
- Matches any single character in \fIstring\fR.
- .IP \fB[\fIchars\fB]\fR 10
- Matches any character in the set given by \fIchars\fR. If a sequence
- of the form
- \fIx\fB\-\fIy\fR appears in \fIchars\fR, then any character
- between \fIx\fR and \fIy\fR, inclusive, will match.
- .IP \fB\e\fIx\fR 10
- Matches the single character \fIx\fR. This provides a way of
- avoiding the special interpretation of the characters
- \fB*?[]\e\fR in \fIpattern\fR.
- .RE
- .TP
- \fBstring range \fIstring first last\fR
- Returns a range of consecutive characters from \fIstring\fR, starting
- with the character whose index is \fIfirst\fR and ending with the
- character whose index is \fIlast\fR. An index of 0 refers to the
- first character of the string. \fILast\fR may be \fBend\fR (or any
- abbreviation of it) to refer to the last character of the string.
- If \fIfirst\fR is less than zero then it is treated as if it were zero, and
- if \fIlast\fR is greater than or equal to the length of the string then
- it is treated as if it were \fBend\fR. If \fIfirst\fR is greater than
- \fIlast\fR then an empty string is returned.
- .TP
- \fBstring tolower \fIstring\fR
- Returns a value equal to \fIstring\fR except that all upper case
- letters have been converted to lower case.
- .TP
- \fBstring toupper \fIstring\fR
- Returns a value equal to \fIstring\fR except that all lower case
- letters have been converted to upper case.
- .TP
- \fBstring trim \fIstring\fR ?\fIchars\fR?
- Returns a value equal to \fIstring\fR except that any leading
- or trailing characters from the set given by \fIchars\fR are
- removed.
- If \fIchars\fR is not specified then white space is removed
- (spaces, tabs, newlines, and carriage returns).
- .TP
- \fBstring trimleft \fIstring\fR ?\fIchars\fR?
- Returns a value equal to \fIstring\fR except that any
- leading characters from the set given by \fIchars\fR are
- removed.
- If \fIchars\fR is not specified then white space is removed
- (spaces, tabs, newlines, and carriage returns).
- .TP
- \fBstring trimright \fIstring\fR ?\fIchars\fR?
- Returns a value equal to \fIstring\fR except that any
- trailing characters from the set given by \fIchars\fR are
- removed.
- If \fIchars\fR is not specified then white space is removed
- (spaces, tabs, newlines, and carriage returns).
-
- .SH KEYWORDS
- case conversion, compare, index, match, pattern, string
-