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Initial commit (a clone of the jsmachines project as of v1.15.3)

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jeffpar 2014-09-27 14:52:57 -07:00
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/**
* @fileoverview Process-related helper functions
* @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a> (@jeffpar)
* @version 1.0
* Created 2014-05-07
*
* Copyright © 2012-2014 Jeff Parsons <Jeff@pcjs.org>
*
* This file is part of the JavaScript Machines Project (aka JSMachines) at <http://jsmachines.net/>
* and <http://pcjs.org/>.
*
* JSMachines is free software: you can redistribute it and/or modify it under the terms of the
* GNU General Public License as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* JSMachines 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with JSMachines.
* If not, see <http://www.gnu.org/licenses/gpl.html>.
*
* You are required to include the above copyright notice in every source code file of every
* copy or modified version of this work, and to display that copyright notice on every screen
* that loads or runs any version of this software (see Computer.sCopyright).
*
* Some JSMachines files also attempt to load external resource files, such as character-image files,
* ROM files, and disk image files. Those external resource files are not considered part of the
* JSMachines Project for purposes of the GNU General Public License, and the author does not claim
* any copyright as to their contents.
*/
"use strict";
var proc = {};
/**
* getArgs()
*
* Processes command-line arguments. Arguments may be introduced by either
* a double-hyphen (--) or a long dash (—), and argument values, if any, must be
* separated by an "=" without any intervening whitespace. Arguments without
* an explicit value default to true, and any argument appearing more than once
* is automatically converted to an Array.
*
* Single-hyphen (-) arguments are allowed as well; they are treated as a series
* of single-character arguments, each set to true, and any of these arguments
* appearing more than once is discarded.
*
* @return {{argc:number, argv:{}}}
*/
proc.getArgs = function() {
var argc = 0;
var argv = {};
for (var i = 2; i < process.argv.length; i++) {
var j, sSep;
var sArg = process.argv[i];
if (!sArg.indexOf(sSep = "--") || !sArg.indexOf(sSep = "—")) {
sArg = sArg.substr(sSep.length);
var sValue = true;
j = sArg.indexOf("=");
if (j > 0) {
sValue = sArg.substr(j+1);
sArg = sArg.substr(0, j);
sValue = (sValue == "true")? true : ((sValue == "false")? false : sValue);
}
if (argv[sArg] === undefined) {
argc++;
argv[sArg] = sValue;
} else {
// console.log("too many '" + sArg + "' arguments");
if (typeof argv[sArg] == "string") {
argv[sArg] = [argv[sArg]];
}
argv[sArg].push(sValue);
}
} else if (!sArg.indexOf("-")) {
for (j = 1; j < sArg.length; j++) {
var ch = sArg.charAt(j);
if (argv[ch] === undefined) {
argv[ch] = true;
argc++;
}
}
}
}
return {argc: argc, argv: argv};
};
if (typeof module !== 'undefined') module.exports = proc;