0N/A/*
2362N/A * Copyright (c) 1994, 2003, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/Apackage sun.tools.tree;
0N/A
0N/Aimport sun.tools.java.*;
0N/Aimport sun.tools.asm.Assembler;
0N/Aimport sun.tools.asm.Label;
0N/Aimport java.io.PrintStream;
0N/Aimport java.util.Hashtable;
0N/A
0N/A/**
0N/A * WARNING: The contents of this source file are not part of any
0N/A * supported API. Code that depends on them does so at its own risk:
0N/A * they are subject to change or removal without notice.
0N/A */
0N/Apublic
0N/Aclass CompoundStatement extends Statement {
0N/A Statement args[];
0N/A
0N/A /**
0N/A * Constructor
0N/A */
0N/A public CompoundStatement(long where, Statement args[]) {
0N/A super(STAT, where);
0N/A this.args = args;
0N/A // To avoid the need for subsequent null checks:
0N/A for (int i = 0 ; i < args.length ; i++) {
0N/A if (args[i] == null) {
0N/A args[i] = new CompoundStatement(where, new Statement[0]);
0N/A }
0N/A }
0N/A }
0N/A
0N/A /**
0N/A * Insert a new statement at the front.
0N/A * This is used to introduce an implicit super-class constructor call.
0N/A */
0N/A public void insertStatement(Statement s) {
0N/A Statement newargs[] = new Statement[1+args.length];
0N/A newargs[0] = s;
0N/A for (int i = 0 ; i < args.length ; i++) {
0N/A newargs[i+1] = args[i];
0N/A }
0N/A this.args = newargs;
0N/A }
0N/A
0N/A /**
0N/A * Check statement
0N/A */
0N/A Vset check(Environment env, Context ctx, Vset vset, Hashtable exp) {
0N/A checkLabel(env, ctx);
0N/A if (args.length > 0) {
0N/A vset = reach(env, vset);
0N/A CheckContext newctx = new CheckContext(ctx, this);
0N/A // In this environment, 'resolveName' will look for local classes.
0N/A Environment newenv = Context.newEnvironment(env, newctx);
0N/A for (int i = 0 ; i < args.length ; i++) {
0N/A vset = args[i].checkBlockStatement(newenv, newctx, vset, exp);
0N/A }
0N/A vset = vset.join(newctx.vsBreak);
0N/A }
0N/A return ctx.removeAdditionalVars(vset);
0N/A }
0N/A
0N/A /**
0N/A * Inline
0N/A */
0N/A public Statement inline(Environment env, Context ctx) {
0N/A ctx = new Context(ctx, this);
0N/A boolean expand = false;
0N/A int count = 0;
0N/A for (int i = 0 ; i < args.length ; i++) {
0N/A Statement s = args[i];
0N/A if (s != null) {
0N/A if ((s = s.inline(env, ctx)) != null) {
0N/A if ((s.op == STAT) && (s.labels == null)) {
0N/A count += ((CompoundStatement)s).args.length;
0N/A } else {
0N/A count++;
0N/A }
0N/A expand = true;
0N/A }
0N/A args[i] = s;
0N/A }
0N/A }
0N/A switch (count) {
0N/A case 0:
0N/A return null;
0N/A
0N/A case 1:
0N/A for (int i = args.length ; i-- > 0 ;) {
0N/A if (args[i] != null) {
0N/A return eliminate(env, args[i]);
0N/A }
0N/A }
0N/A break;
0N/A }
0N/A if (expand || (count != args.length)) {
0N/A Statement newArgs[] = new Statement[count];
0N/A for (int i = args.length ; i-- > 0 ;) {
0N/A Statement s = args[i];
0N/A if (s != null) {
0N/A if ((s.op == STAT) && (s.labels == null)) {
0N/A Statement a[] = ((CompoundStatement)s).args;
0N/A for (int j = a.length ; j-- > 0 ; ) {
0N/A newArgs[--count] = a[j];
0N/A }
0N/A } else {
0N/A newArgs[--count] = s;
0N/A }
0N/A }
0N/A }
0N/A args = newArgs;
0N/A }
0N/A return this;
0N/A }
0N/A
0N/A /**
0N/A * Create a copy of the statement for method inlining
0N/A */
0N/A public Statement copyInline(Context ctx, boolean valNeeded) {
0N/A CompoundStatement s = (CompoundStatement)clone();
0N/A s.args = new Statement[args.length];
0N/A for (int i = 0 ; i < args.length ; i++) {
0N/A s.args[i] = args[i].copyInline(ctx, valNeeded);
0N/A }
0N/A return s;
0N/A }
0N/A
0N/A /**
0N/A * The cost of inlining this statement
0N/A */
0N/A public int costInline(int thresh, Environment env, Context ctx) {
0N/A int cost = 0;
0N/A for (int i = 0 ; (i < args.length) && (cost < thresh) ; i++) {
0N/A cost += args[i].costInline(thresh, env, ctx);
0N/A }
0N/A return cost;
0N/A }
0N/A
0N/A /**
0N/A * Code
0N/A */
0N/A public void code(Environment env, Context ctx, Assembler asm) {
0N/A CodeContext newctx = new CodeContext(ctx, this);
0N/A for (int i = 0 ; i < args.length ; i++) {
0N/A args[i].code(env, newctx, asm);
0N/A }
0N/A asm.add(newctx.breakLabel);
0N/A }
0N/A
0N/A /**
0N/A * Check if the first thing is a constructor invocation
0N/A */
0N/A public Expression firstConstructor() {
0N/A return (args.length > 0) ? args[0].firstConstructor() : null;
0N/A }
0N/A
0N/A /**
0N/A * Print
0N/A */
0N/A public void print(PrintStream out, int indent) {
0N/A super.print(out, indent);
0N/A out.print("{\n");
0N/A for (int i = 0 ; i < args.length ; i++) {
0N/A printIndent(out, indent+1);
0N/A if (args[i] != null) {
0N/A args[i].print(out, indent + 1);
0N/A } else {
0N/A out.print("<empty>");
0N/A }
0N/A out.print("\n");
0N/A }
0N/A printIndent(out, indent);
0N/A out.print("}");
0N/A }
0N/A}