/* * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */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;/** * WARNING: The contents of this source file are not part of any * supported API. Code that depends on them does so at its own risk: * they are subject to change or removal without notice. */publicclass BreakStatement extends Statement { Identifier lbl; /** * Constructor */ public BreakStatement(long where, Identifier lbl) { super(BREAK, where); this.lbl = lbl; } /** * Check statement */ Vset check(Environment env, Context ctx, Vset vset, Hashtable exp) { reach(env, vset); checkLabel(env, ctx); CheckContext destctx = (CheckContext)new CheckContext(ctx, this).getBreakContext(lbl); if (destctx != null) { if (destctx.frameNumber != ctx.frameNumber) { env.error(where, "branch.to.uplevel", lbl); } destctx.vsBreak = destctx.vsBreak.join(vset); } else { if (lbl != null) { env.error(where, "label.not.found", lbl); } else { env.error(where, "invalid.break"); } } CheckContext exitctx = ctx.getTryExitContext(); if (exitctx != null) { exitctx.vsTryExit = exitctx.vsTryExit.join(vset); } return DEAD_END; } /** * The cost of inlining this statement */ public int costInline(int thresh, Environment env, Context ctx) { 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(";"); }}
/*
* Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
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;
/**
* WARNING: The contents of this source file are not part of any
* supported API. Code that depends on them does so at its own risk:
* they are subject to change or removal without notice.
*/
public
class BreakStatement extends Statement {
Identifier lbl;
/**
* Constructor
*/
public BreakStatement(long where, Identifier lbl) {
super(BREAK, where);
this.lbl = lbl;
}
/**
* Check statement
*/
Vset check(Environment env, Context ctx, Vset vset, Hashtable exp) {
reach(env, vset);
checkLabel(env, ctx);
CheckContext destctx = (CheckContext)new CheckContext(ctx, this).getBreakContext(lbl);
if (destctx != null) {
if (destctx.frameNumber != ctx.frameNumber) {
env.error(where, "branch.to.uplevel", lbl);
}
destctx.vsBreak = destctx.vsBreak.join(vset);
} else {
if (lbl != null) {
env.error(where, "label.not.found", lbl);
} else {
env.error(where, "invalid.break");
}
}
CheckContext exitctx = ctx.getTryExitContext();
if (exitctx != null) {
exitctx.vsTryExit = exitctx.vsTryExit.join(vset);
}
return DEAD_END;
}
/**
* The cost of inlining this statement
*/
public int costInline(int thresh, Environment env, Context ctx) {
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(";");
}
}