/*
* NOTE: This copyright does *not* cover user programs that use HQ
* program services by normal system calls through the application
* program interfaces provided as part of the Hyperic Plug-in Development
* Kit or the Hyperic Client Development Kit - this is merely considered
* normal use of the program, and does *not* fall under the heading of
* "derived work".
*
* Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
* This file is part of HQ.
*
* HQ is free software; you can redistribute it and/or modify
* it under the terms version 2 of the GNU General Public License as
* published by the Free Software Foundation. This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*/
package org.hyperic.util.exec;
public class Escape {
private static char[] enlargeArray(char[] in){
char[] res;
res = new char[in.length * 2];
System.arraycopy(in, 0, res, 0, in.length);
return res;
}
/**
* Escape a string by quoting the magical elements
* (such as whitespace, quotes, slashes, etc.)
*/
public static String escape(String in){
char[] inChars, outChars, resChars;
int numOut;
inChars = new char[in.length()];
outChars = new char[inChars.length];
in.getChars(0, inChars.length, inChars, 0);
numOut = 0;
for(int i=0; i<inChars.length; i++){
if(outChars.length - numOut < 5){
outChars = enlargeArray(outChars);
}
if(Character.isWhitespace(inChars[i]) ||
inChars[i] == '\\' ||
inChars[i] == '\'' ||
inChars[i] == '\"' ||
inChars[i] == '&' ||
inChars[i] == ';')
{
outChars[numOut++] = '\\';
outChars[numOut++] = inChars[i];
} else {
outChars[numOut++] = inChars[i];
}
}
return new String(outChars, 0, numOut);
}
public static void main(String[] args){
System.out.println(Escape.escape("foo bar"));
System.out.println(Escape.escape("\\\"foo' bar\""));
}
}