/*
 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */


package org.graalvm.compiler.code;

import static jdk.vm.ci.meta.MetaUtil.identityHashCodeString;

import org.graalvm.compiler.graph.NodeSourcePosition;

/**
 * This provides a mapping between a half-open range of PCs in the generated code and a
 * {@link NodeSourcePosition} in the original program. Depending on the backend this information may
 * be represented in different ways or not at all.
 */
public final class SourceMapping {

    private final int startOffset;

    private final int endOffset;

    private final NodeSourcePosition sourcePosition;

    public SourceMapping(int startOffset, int endOffset, NodeSourcePosition sourcePosition) {
        this.startOffset = startOffset;
        this.endOffset = endOffset;
        this.sourcePosition = sourcePosition;
    }

    public int getStartOffset() {
        return startOffset;
    }

    public int getEndOffset() {
        return endOffset;
    }

    public NodeSourcePosition getSourcePosition() {
        return sourcePosition;
    }

    @Override
    public String toString() {
        return identityHashCodeString(this);
    }

    @Override
    public int hashCode() {
        throw new UnsupportedOperationException("hashCode");
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof SourceMapping) {
            SourceMapping other = (SourceMapping) obj;
            return other.startOffset == startOffset && other.endOffset == endOffset && other.sourcePosition.equals(sourcePosition);
        }
        return false;
    }

    public boolean contains(int offset) {
        return startOffset <= offset && offset < endOffset;
    }

}
