/*

 * Copyright (c) 2016, 2017, 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.

 *

 * 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 jdk.tools.jaotc;

import java.util.List;

import jdk.vm.ci.code.site.Mark;

final class CodeOffsets {

    private final int entry;

    private final int verifiedEntry;

    private final int exceptionHandler;

    private final int deoptHandler;

    private CodeOffsets(int entry, int verifiedEntry, int exceptionHandler, int deoptHandler) {

        this.entry = entry;

        this.verifiedEntry = verifiedEntry;

        this.exceptionHandler = exceptionHandler;

        this.deoptHandler = deoptHandler;

    }

    static CodeOffsets buildFrom(List<Mark> marks) {

        int entry = 0;

        int verifiedEntry = 0;

        int exceptionHandler = -1;

        int deoptHandler = -1;

        for (Mark mark : marks) {

            if (mark.id instanceof Integer) {

                MarkId markId = MarkId.getEnum((int) mark.id);

                switch (markId) {

                    case UNVERIFIED_ENTRY:

                        entry = mark.pcOffset;

                        break;

                    case VERIFIED_ENTRY:

                        verifiedEntry = mark.pcOffset;

                        break;

                    case OSR_ENTRY:

                        // Unhandled

                        break;

                    case EXCEPTION_HANDLER_ENTRY:

                        exceptionHandler = mark.pcOffset;

                        break;

                    case DEOPT_HANDLER_ENTRY:

                        deoptHandler = mark.pcOffset;

                        break;

                    default:

                        break; // Ignore others

                }

            }

        }

        return new CodeOffsets(entry, verifiedEntry, exceptionHandler, deoptHandler);

    }

    int entry() {

        return entry;

    }

    int verifiedEntry() {

        return verifiedEntry;

    }

    int exceptionHandler() {

        return exceptionHandler;

    }

    int deoptHandler() {

        return deoptHandler;

    }

}