/*
* @(#)BreakStatement.java 1.14 95/09/14 Arthur van Hoff
*
* Copyright (c) 1994 Sun Microsystems, Inc. All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this software
* and its documentation for NON-COMMERCIAL purposes and without
* fee is hereby granted provided that this copyright notice
* appears in all copies. Please refer to the file "copyright.html"
* for further important copyright and licensing information.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
* THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
* TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
*/
package sun.tools.tree;
import sun.tools.java.*;
import sun.tools.asm.Assembler;
import sun.tools.asm.Label;
import java.io.PrintStream;
import java.util.Hashtable;
public
class BreakStatement extends Statement {
Identifier lbl;
/**
* Constructor
*/
public BreakStatement(int where, Identifier lbl) {
super(BREAK, where);
this.lbl = lbl;
}
/**
* Check statement
*/
long check(Environment env, Context ctx, long vset, Hashtable exp) {
reach(env, vset);
CheckContext destctx = (CheckContext)new CheckContext(ctx, this).getBreakContext(lbl);
if (destctx != null) {
destctx.vsBreak &= vset;
} else {
if (lbl != null) {
env.error(where, "label.not.found", lbl);
} else {
env.error(where, "invalid.break");
}
}
return -1;
}
/**
* The cost of inlining this statement
*/
public int costInline(int thresh) {
return 1;
}
/**
* Code
*/
public void code(Environment env, Context ctx, Assembler asm) {
CodeContext newctx = new CodeContext(ctx, this);
CodeContext destctx = (CodeContext)newctx.getBreakContext(lbl);
codeFinally(env, ctx, asm, destctx, null);
asm.add(where, opc_goto, destctx.breakLabel);
asm.add(newctx.breakLabel);
}
/**
* Print
*/
public void print(PrintStream out, int indent) {
super.print(out, indent);
out.print("break");
if (lbl != null) {
out.print(" " + lbl);
}
out.print(";");
}
}