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100 lines
3.0 KiB
Plaintext
100 lines
3.0 KiB
Plaintext
NAME
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argv - count or value of a calc command line supplied argument
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SYNOPSIS
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argv([n])
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TYPES
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n nonnegative integer
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return any
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DESCRIPTION
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Without args, this builtin returns the number of calc command line
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strings available, including the program or script name.
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If the numeric arg is supplied, then the corresponding command line
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string is return, if it exists. Otherwise a null() value is returned.
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In keeping with the argc/argv convention of C, argv(0) will refer
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to the name of the program. If the -f filename argument is used,
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then argv(0) will refer to the filename. In the case of a #! script,
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assuming the calc is located in /usr/local/bin/calc, the first
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line of a calc script would be:
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#!/usr/local/bin/calc -f
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...
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then argv(0) will refer to the filename of the script.
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As it is common to use -q in a calc script, and using that same
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/usr/local/bin/calc location:
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#!/usr/local/bin/calc -q -f
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...
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and again, argv(0) will refer to the filename of the script.
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The 1st argument to calc will be argv(1), and argv(argv()-1)
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will refer to the last. This differs from the way the param()
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builtin works.
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By default, calc will evaluate all of its command line arguments.
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However, if calc is invoked with -s, all non-dashed options will
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be left as unevaluated strings. Thus:
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calc -i 2+2
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will cause calc to print 4 and enter interactive mode. In this case
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argv() will return 1.
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On the other hand:
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calc -i -s 2+2
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will cause calc to interactive mode. The argv() builtin will return 2
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and argv(1) will return the string "2+2".
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EXAMPLE
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$ calc -s a bb ccc
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; argc = argv();
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; print "argc =", argc;
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argc = 4
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; print 'argv[0] = "': argv(0) : '"';
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argv[0] = "calc"
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; for (i = 1; i < argc; i++) print "argv[": i : '] = "': argv(i) : '"';
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argv[1] = "a"
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argv[2] = "bb"
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argv[3] = "ccc"
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LIMITS
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0 <= n < 2^31
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LINK LIBRARY
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none
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SEE ALSO
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param, system, usage
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## Copyright (C) 1999-2006,2021 Landon Curt Noll
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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##
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## Under source code control: 1999/11/23 19:45:05
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## File existed as early as: 1999
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##
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## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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