/*****************************************************************************
* *
* This file is part of the BeanShell Java Scripting distribution. *
* Documentation and updates may be found at http://www.beanshell.org/ *
* *
* Sun Public License Notice: *
* *
* The contents of this file are subject to the Sun Public License Version *
* 1.0 (the "License"); you may not use this file except in compliance with *
* the License. A copy of the License is available at http://www.sun.com *
* *
* The Original Code is BeanShell. The Initial Developer of the Original *
* Code is Pat Niemeyer. Portions created by Pat Niemeyer are Copyright *
* (C) 2000. All Rights Reserved. *
* *
* GNU Public License Notice: *
* *
* Alternatively, the contents of this file may be used under the terms of *
* the GNU Lesser General Public License (the "LGPL"), in which case the *
* provisions of LGPL are applicable instead of those above. If you wish to *
* allow use of your version of this file only under the terms of the LGPL *
* and not to allow others to use your version of this file under the SPL, *
* indicate your decision by deleting the provisions above and replace *
* them with the notice and other provisions required by the LGPL. If you *
* do not delete the provisions above, a recipient may use your version of *
* this file under either the SPL or the LGPL. *
* *
* Patrick Niemeyer (pat@pat.net) *
* Author of Learning Java, O'Reilly & Associates *
* http://www.pat.net/~pat/ *
* *
*****************************************************************************/
package org.gjt.sp.jedit.bsh;
class BSHLiteral extends SimpleNode
{
public Object value;
BSHLiteral(int id) { super(id); }
public Object eval( CallStack callstack, Interpreter interpreter )
throws EvalError
{
if ( value == null )
throw new InterpreterError("Null in bsh literal: "+value);
return value;
}
private char getEscapeChar(char ch)
{
switch(ch)
{
case 'b':
ch = '\b';
break;
case 't':
ch = '\t';
break;
case 'n':
ch = '\n';
break;
case 'f':
ch = '\f';
break;
case 'r':
ch = '\r';
break;
// do nothing - ch already contains correct character
case '"':
case '\'':
case '\\':
break;
}
return ch;
}
public void charSetup(String str)
{
char ch = str.charAt(0);
if(ch == '\\')
{
// get next character
ch = str.charAt(1);
if(Character.isDigit(ch))
ch = (char)Integer.parseInt(str.substring(1), 8);
else
ch = getEscapeChar(ch);
}
value = new Primitive(new Character(ch).charValue());
}
void stringSetup(String str)
{
StringBuilder buffer = new StringBuilder();
for(int i = 0; i < str.length(); i++)
{
char ch = str.charAt(i);
if(ch == '\\')
{
// get next character
ch = str.charAt(++i);
if(Character.isDigit(ch))
{
int endPos = i;
// check the next two characters
while(endPos < i + 2)
{
if(Character.isDigit(str.charAt(endPos + 1)))
endPos++;
else
break;
}
ch = (char)Integer.parseInt(str.substring(i, endPos + 1), 8);
i = endPos;
}
else
ch = getEscapeChar(ch);
}
buffer.append(ch);
}
value = buffer.toString().intern();
}
}