/*
 * Copyright (c) 2016, 2020, 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 org.graalvm.compiler.code.CompilationResult;
import org.graalvm.compiler.hotspot.HotSpotMarkId;

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<CompilationResult.CodeMark> marks) {
        int entry = 0;
        int verifiedEntry = 0;
        int exceptionHandler = -1;
        int deoptHandler = -1;

        for (CompilationResult.CodeMark mark : marks) {
            HotSpotMarkId markId = (HotSpotMarkId) 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;
    }
}