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Language/OS - Multiplatform Resource Library
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LANGUAGE OS.iso
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tcl70b2.lha
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tcl7.0b2
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scan.n
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1993-07-16
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'\"
'\" 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/scan.n,v 1.2 93/07/16 16:55:51 ouster Exp $ SPRITE (Berkeley)
'\"
.so man.macros
.HS scan tcl
.BS
'\" Note: do not modify the .SH NAME line immediately below!
.SH NAME
scan \- Parse string using sscanf-style conversions
.SH SYNOPSIS
\fBscan \fIstring format varName \fR?\fIvarName ...\fR?
.BE
.SH DESCRIPTION
.PP
This command parses fields from an input string in the same fashion
as the ANSI C \fBsscanf\fR procedure and returns a count of the number
of fields sucessfully parsed. \fIString\fR gives the input to
be parsed and \fIformat\fR indicates how to parse it, using \fB%\fR
fields as in \fBsscanf\fR. Each \fIvarName\fR gives
the name of a variable; when a field is scanned from \fIstring\fR,
the result is converted back into a string and assigned to the
corresponding \fIvarName\fR.
All of the \fBsscanf\fR conversion specifiers are valid except for
the following differences:
.IP [1]
.VS
\fB%p\fR and \fB%n\fR conversion specifiers are not currently
supported.
.VE
.IP [2]
For \fB%c\fR conversions a single character value is
converted to a decimal string, which is then assigned to the
corresponding \fIvarName\fR;
no field width may be specified for this conversion.
.IP [3]
.VS
The \fBl\fR, \fBh\fR, and \fBL\fR modifiers are ignored; integer
values are always converted as if there were no modifier present
and real values are always converted as if the \fBl\fR modifier
were present (i.e. type \fBdouble\fR is used for the internal
representation).
.VE
.SH KEYWORDS
parse, scan