65 lines
2.5 KiB
Groff
65 lines
2.5 KiB
Groff
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'\"
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'\" Copyright (c) 1989-1993 The Regents of the University of California.
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'\" All rights reserved.
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'\"
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'\" Permission is hereby granted, without written agreement and without
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'\" license or royalty fees, to use, copy, modify, and distribute this
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'\" documentation for any purpose, provided that the above copyright
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'\" notice and the following two paragraphs appear in all copies.
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'\"
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'\" IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
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'\" FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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'\" ARISING OUT OF THE USE OF THIS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
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'\" CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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'\"
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'\" THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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'\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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'\" AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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'\" ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
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'\" PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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'\"
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'\" $Header: /user6/ouster/tcl/man/RCS/Concat.3,v 1.6 93/04/01 09:25:23 ouster Exp $ SPRITE (Berkeley)
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'\"
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.so man.macros
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.HS Tcl_Concat tclc
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.BS
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.SH NAME
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Tcl_Concat \- concatenate a collection of strings
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.SH SYNOPSIS
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.nf
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\fB#include <tcl.h>\fR
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.sp
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char *
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\fBTcl_Concat\fR(\fIargc, argv\fR)
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.SH ARGUMENTS
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.AP int argc in
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Number of strings.
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.AP char *argv[] in
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Array of strings to concatenate. Must have \fIargc\fR entries.
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.BE
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.SH DESCRIPTION
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.PP
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\fBTcl_Concat\fR is a utility procedure used by several of the
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Tcl commands. Given a collection of strings, it concatenates
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them together into a single string, with the original strings
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separated by spaces. This procedure behaves differently than
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\fBTcl_Merge\fR, in that the arguments are simply concatenated:
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no effort is made to ensure proper list structure.
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However, in most common usage the arguments will all be proper
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lists themselves; if this is true, then the result will also have
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proper list structure.
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.PP
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\fBTcl_Concat\fR eliminates leading and trailing white space as it
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copies strings from \fBargv\fR to the result. If an element of
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\fBargv\fR consists of nothing but white space, then that string
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is ignored entirely. This white-space removal was added to make
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the output of the \fBconcat\fR command cleaner-looking.
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.PP
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The result string is dynamically allocated
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using \fBmalloc()\fR; the caller must eventually release the space
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by calling \fBfree()\fR.
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.SH KEYWORDS
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concatenate, strings
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