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/*
 * Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
 * freely licensable by each licensor hereunder covering either (i) the
 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
 *
 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
 * is contributed by such licensors),
 *
 * without restriction, including without limitation the rights to copy, create
 * derivative works of, display, perform, and distribute the Software and make,
 * use, sell, offer for sale, import, export, have made, and have sold the
 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
 *
 * This license is subject to the following condition:
 *
 * The above copyright notice and either this complete permission notice or at a
 * minimum a reference to the UPL must be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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 * SOFTWARE.
 */
package com.oracle.graal.python.lib;

import com.oracle.graal.python.builtins.objects.cext.PythonNativeVoidPtr;
import com.oracle.graal.python.builtins.objects.ints.PInt;
import com.oracle.graal.python.nodes.PNodeWithContext;
import com.oracle.truffle.api.dsl.GenerateCached;
import com.oracle.truffle.api.dsl.GenerateInline;
import com.oracle.truffle.api.dsl.GenerateUncached;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.nodes.Node;

/**
 * Equivalent of CPython's {@code PyLong_CheckExact}.
 */
@GenerateUncached
@GenerateInline
@GenerateCached(false)
public abstract class PyLongCheckExactNode extends PNodeWithContext {
    public static final boolean executeUncached(Object object) {
        return PyLongCheckExactNodeGen.getUncached().execute(null, object);
    }

    public abstract boolean execute(Node inliningTarget, Object object);

    @Specialization
    static boolean doInt(@SuppressWarnings("unused") Integer object) {
        return true;
    }

    @Specialization
    static boolean doLong(@SuppressWarnings("unused") Long object) {
        return true;
    }

    @Specialization(guards = "isBuiltinPInt(object)")
    static boolean doBuiltinPInt(@SuppressWarnings("unused") PInt object) {
        return true;
    }

    @Specialization(guards = "!isBuiltinPInt(object)")
    static boolean doOtherPInt(@SuppressWarnings("unused") PInt object) {
        return false;
    }

    @Specialization(guards = "!canBeBuiltinInt(object)")
    static boolean doOther(@SuppressWarnings("unused") Object object) {
        return false;
    }

    @Specialization
    static boolean doNativePtr(@SuppressWarnings("unused") PythonNativeVoidPtr object) {
        return true;
    }

    protected static boolean canBeBuiltinInt(Object object) {
        // Boolean is a subclass, don't put it here
        return object instanceof Integer || object instanceof Long || object instanceof PInt || object instanceof PythonNativeVoidPtr;
    }

    public static PyLongCheckExactNode getUncached() {
        return PyLongCheckExactNodeGen.getUncached();
    }
}