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  • substring ';' STRING ';' START ( ';' END )?
    Macro

    Return a substring of a given string, negative indexes allowed

    static String	_substring	= "${substring;<string>;<start>[;<end>]}";
    
    public String _substring(String args[]) throws Exception {
    	verifyCommand(args, _substring, null, 3, 4);
    
    	String string = args[1];
    	int start = Integer.parseInt(args[2].equals("") ? "0" : args[2]);
    	int end = string.length();
    
    	if (args.length > 3) {
    		end = Integer.parseInt(args[3]);
    		if (end < 0)
    			end = string.length() + end;
    	}
    
    	if (start < 0)
    		start = string.length() + start;
    	
    	if ( start > end ) {
    		int t = start;
    		start = end;
    		end = t;
    	}
    
    	return string.substring(start, end);
    }
    
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