dasciz.java

用Java实现的编译器。把源代码编译成SPARC汇编程序

	// $Id: dAsciiz.java,v 1.5 2000/10/21 23:18:10 mdeeds Exp $

package java6035.tools.ASM;

/**
 * dAsciz
 *
 * represents an .asciz directive in ASM file. ".asciz str" stores the
 * string in memory and null terminate it.
 */

public class dAsciz extends ASMDirective
{
    public String str;

    /**
     * Create a new ASCIZ string directive.  (0 terminated string.)
     * @param str is the string to represent.
     **/
    public dAsciz(String str)
    {
		super(ASMDirective.ASCIZ);
		this.str = str;
    }

    /**
     * Quotes the string in a way that can be understood by other tools.
     * Turns quotes into \", backslashes into \\, and newlines into \n.
     */
    public static String quotify(String str)
    {
        String out = "";
        int i;

        for (i = 0; i < str.length(); i++)
        {
              if (str.charAt(i) == '\\') {
	               if(str.charAt(i+1) != 'n')
	                   out += "";
	                else
	                   out += "\\";
				            }
	        else if (str.charAt(i) == '\"')
                out += "\\\"";
            else if (str.charAt(i) == '\n')
                out += "\\n";
            else
                out += str.charAt(i);
        }
        return out;
    }

    /**
     * Returns the string representation.  Special characters in the string
     * are replaced with their backslash-quoted representation.
     */
    public String toString()
    {
		return ".asciz \""+quotify(str)+"\"";
    }
}