com.oracle.truffle.js.nodes.access.GlobalConstantNode Maven / Gradle / Ivy

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/*
 * Copyright (c) 2018, 2021, 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
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
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 * 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
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package com.oracle.truffle.js.nodes.access;

import java.util.Set;

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.TruffleFile;
import com.oracle.truffle.api.TruffleLanguage.Env;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.instrumentation.Tag;
import com.oracle.truffle.api.nodes.UnexpectedResultException;
import com.oracle.truffle.api.source.Source;
import com.oracle.truffle.api.strings.TruffleString;
import com.oracle.truffle.js.nodes.JavaScriptNode;
import com.oracle.truffle.js.nodes.ReadNode;
import com.oracle.truffle.js.nodes.instrumentation.JSTags;
import com.oracle.truffle.js.nodes.instrumentation.JSTags.ReadPropertyTag;
import com.oracle.truffle.js.runtime.Strings;

public class GlobalConstantNode extends JSTargetableNode implements ReadNode {

    @Child private GlobalObjectNode globalObjectNode;
    @Child private JSConstantNode constantNode;
    private final TruffleString propertyName;

    protected GlobalConstantNode(TruffleString propertyName, JSConstantNode constantNode) {
        this.globalObjectNode = GlobalObjectNode.create();
        this.constantNode = constantNode;
        this.propertyName = propertyName;
    }

    public static JSTargetableNode createGlobalConstant(TruffleString propertyName, Object value) {
        return new GlobalConstantNode(propertyName, JSConstantNode.create(value));
    }

    @Override
    public boolean hasTag(Class tag) {
        if (tag == ReadPropertyTag.class) {
            return true;
        } else {
            return super.hasTag(tag);
        }
    }

    @Override
    public Object getNodeObject() {
        return JSTags.createNodeObjectDescriptor("key", propertyName);
    }

    @Override
    public Object executeWithTarget(VirtualFrame frame, Object target) {
        return execute(frame);
    }

    @Override
    public Object evaluateTarget(VirtualFrame frame) {
        return globalObjectNode.executeDynamicObject();
    }

    @Override
    public JavaScriptNode getTarget() {
        return globalObjectNode;
    }

    @Override
    public Object execute(VirtualFrame frame) {
        return constantNode.execute(frame);
    }

    @Override
    public int executeInt(VirtualFrame frame) throws UnexpectedResultException {
        return constantNode.executeInt(frame);
    }

    @Override
    public double executeDouble(VirtualFrame frame) throws UnexpectedResultException {
        return constantNode.executeDouble(frame);
    }

    public Object getValue() {
        return constantNode.getValue();
    }

    @Override
    @TruffleBoundary
    public String toString() {
        return String.format("%s(property=%s, value=%s)", super.toString(), propertyName, constantNode.getValue());
    }

    @Override
    protected JavaScriptNode copyUninitialized(Set> materializedTags) {
        return new GlobalConstantNode(propertyName, cloneUninitialized(constantNode, materializedTags));
    }

    static final class LineNumberNode extends JSConstantNode {
        LineNumberNode() {
        }

        @Override
        public Object execute(VirtualFrame frame) {
            return getLineNumber();
        }

        @Override
        public int executeInt(VirtualFrame frame) {
            return getLineNumber();
        }

        @Override
        public double executeDouble(VirtualFrame frame) {
            return getLineNumber();
        }

        @TruffleBoundary
        private int getLineNumber() {
            return getEncapsulatingSourceSection().getStartLine();
        }

        @Override
        public Object getValue() {
            return getLineNumber();
        }
    }

    static final class FileNameNode extends JSConstantNode {
        @CompilationFinal private TruffleString filename = null;

        FileNameNode() {
        }

        @Override
        public TruffleString execute(VirtualFrame frame) {
            return getFileName();
        }

        private TruffleString getFileName() {
            if (filename == null) {
                CompilerDirectives.transferToInterpreterAndInvalidate();
                Source source = getEncapsulatingSourceSection().getSource();
                String path = source.getPath();
                filename = Strings.fromJavaString((path == null) ? source.getName() : path);
            }
            return filename;
        }

        @Override
        public TruffleString getValue() {
            return getFileName();
        }
    }

    static final class DirNameNode extends JSConstantNode {

        DirNameNode() {
        }

        @Override
        public TruffleString execute(VirtualFrame frame) {
            return getDirName();
        }

        @TruffleBoundary
        private TruffleString getDirName() {
            Source source = getEncapsulatingSourceSection().getSource();
            if (source.isInternal() || source.isInteractive()) {
                return Strings.EMPTY_STRING;
            }
            String path = source.getPath();
            path = (path == null) ? source.getName() : path;
            if (path.startsWith("file:")) {
                path = path.substring("file:".length());
            }
            Env env = getRealm().getEnv();
            String fileSeparator = env.getFileNameSeparator();
            if ("\\".equals(fileSeparator) && path.startsWith("/")) {
                // on Windows, remove first "/" from /c:/test/dir/ style paths
                path = path.substring(1);
            }
            TruffleFile filePath = env.getPublicTruffleFile(path).getAbsoluteFile();
            TruffleFile parentPath = filePath.getParent();
            String dirPath = (parentPath == null) ? "" : parentPath.getPath();
            if (!dirPath.isEmpty() && !(dirPath.charAt(dirPath.length() - 1) == '/' || fileSeparator.equals(String.valueOf(dirPath.charAt(dirPath.length() - 1))))) {
                dirPath += fileSeparator;
            }
            return Strings.fromJavaString(dirPath);
        }

        @Override
        public Object getValue() {
            return getDirName();
        }
    }
}