fscan

Calc Software Package for Number Calc

NAME
   fscan - scan a file for possible assignment to variables

SYNOPSIS
   fscan(fs, x_1, x_2, ..., x_n)

TYPES
    fs			file stream open for reading
    x_1, x_2, ...	any

    return		integer

DESCRIPTION
   Starting at the current position on fs and while values remain in the
   x_i arguments, fields of non-whitespace characters are read and evaluated
   in succession and if the corresponding x_i is an lvalue, the value of
   the field is assigned to x_i.  Scanning ceases when no x_i remain or
   when the stream reaches end-of-file.

   The function returns the number of fields evaluated.

EXAMPLE
    ; global a, b, c, d;
    ; f = fopen("/tmp/junk", "w+");
    ; fputs(f, "\t3+4\t\ta-2i  d=a^2   'word'")
    ; rewind(f)
    ; fscan(f, a, b, , c)
	4
    ; print a, b, c, d
    7 a-2i word 49

LIMITS
    The number of arguments is not to exceed 1024.

LINK LIBRARY
    none

SEE ALSO
    scan, strscan, fscanf, scanf, strscanf, printf, fprintf, strprintf

## Copyright (C) 1999-2006  Landon Curt Noll
##
## Calc is open software; you can redistribute it and/or modify it under
## the terms of the version 2.1 of the GNU Lesser General Public License
## as published by the Free Software Foundation.
##
## Calc is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
## or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU Lesser General
## Public License for more details.
##
## A copy of version 2.1 of the GNU Lesser General Public License is
## distributed with calc under the filename COPYING-LGPL.  You should have
## received a copy with calc; if not, write to Free Software Foundation, Inc.
## 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
##
## @(#) $Revision: 29.4 $
## @(#) $Id: fscan,v 29.4 2006/06/25 22:16:55 chongo Exp $
## @(#) $Source: /usr/local/src/cmd/calc/help/RCS/fscan,v $
##
## Under source code control:	1996/04/30 03:05:18
## File existed as early as:	1996
##
## chongo <was here> /\oo/\	http://www.isthe.com/chongo/
## Share and enjoy!  :-)	http://www.isthe.com/chongo/tech/comp/calc/