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markom |
'\"
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'\" Copyright (c) 1989-1993 The Regents of the University of California.
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'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
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'\"
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'\" See the file "license.terms" for information on usage and redistribution
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'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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'\"
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'\" RCS: @(#) $Id: Concat.3,v 1.1.1.1 2002-01-16 10:25:23 markom Exp $
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'\"
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.so man.macros
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.TH Tcl_Concat 3 7.5 Tcl "Tcl Library Procedures"
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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 \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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.VS
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The result string is dynamically allocated
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using \fBTcl_Alloc\fR; the caller must eventually release the space
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by calling \fBTcl_Free\fR.
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.VE
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.VS
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.SH "SEE ALSO"
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Tcl_ConcatObj
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.SH KEYWORDS
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concatenate, strings
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