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Truffle SL is an example language implemented using the Truffle API.
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/*
* Copyright (c) 2017, 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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*/
package com.oracle.truffle.sl.runtime;
import java.math.BigDecimal;
import java.math.BigInteger;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.TruffleLanguage;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.interop.TruffleObject;
import com.oracle.truffle.api.interop.UnsupportedMessageException;
import com.oracle.truffle.api.library.ExportLibrary;
import com.oracle.truffle.api.library.ExportMessage;
import com.oracle.truffle.sl.SLLanguage;
@ExportLibrary(InteropLibrary.class)
@SuppressWarnings("static-method")
public final class SLBigInteger implements TruffleObject, Comparable {
private final BigInteger value;
public SLBigInteger(BigInteger value) {
this.value = value;
}
public SLBigInteger(long value) {
this.value = BigInteger.valueOf(value);
}
public BigInteger getValue() {
return value;
}
@TruffleBoundary
public int compareTo(SLBigInteger o) {
return value.compareTo(o.getValue());
}
@Override
@TruffleBoundary
public String toString() {
return value.toString();
}
@Override
@TruffleBoundary
public boolean equals(Object obj) {
if (obj instanceof SLBigInteger) {
return value.equals(((SLBigInteger) obj).getValue());
}
return false;
}
@Override
public int hashCode() {
return value.hashCode();
}
@SuppressWarnings("static-method")
@ExportMessage
boolean isNumber() {
return true;
}
@ExportMessage
@TruffleBoundary
boolean fitsInByte() {
return value.bitLength() < 8;
}
@ExportMessage
@TruffleBoundary
boolean fitsInShort() {
return value.bitLength() < 16;
}
@ExportMessage
@TruffleBoundary
boolean fitsInFloat() {
if (value.bitLength() <= 24) { // 24 = size of float mantissa + 1
return true;
} else {
float floatValue = value.floatValue();
if (!Float.isFinite(floatValue)) {
return false;
}
try {
return new BigDecimal(floatValue).toBigIntegerExact().equals(value);
} catch (ArithmeticException e) {
throw CompilerDirectives.shouldNotReachHere(e);
}
}
}
@ExportMessage
@TruffleBoundary
boolean fitsInLong() {
return value.bitLength() < 64;
}
@ExportMessage
@TruffleBoundary
boolean fitsInInt() {
return value.bitLength() < 32;
}
@ExportMessage
@TruffleBoundary
boolean fitsInDouble() {
if (value.bitLength() <= 53) { // 53 = size of double mantissa + 1
return true;
} else {
double doubleValue = value.doubleValue();
if (!Double.isFinite(doubleValue)) {
return false;
}
try {
return new BigDecimal(doubleValue).toBigIntegerExact().equals(value);
} catch (ArithmeticException e) {
throw CompilerDirectives.shouldNotReachHere(e);
}
}
}
@ExportMessage
public boolean fitsInBigInteger() {
return true;
}
@ExportMessage
@TruffleBoundary
double asDouble() throws UnsupportedMessageException {
if (fitsInDouble()) {
return value.doubleValue();
} else {
throw UnsupportedMessageException.create();
}
}
@ExportMessage
@TruffleBoundary
long asLong() throws UnsupportedMessageException {
if (fitsInLong()) {
return value.longValue();
} else {
throw UnsupportedMessageException.create();
}
}
@ExportMessage
@TruffleBoundary
byte asByte() throws UnsupportedMessageException {
if (fitsInByte()) {
return value.byteValue();
} else {
throw UnsupportedMessageException.create();
}
}
@ExportMessage
@TruffleBoundary
int asInt() throws UnsupportedMessageException {
if (fitsInInt()) {
return value.intValue();
} else {
throw UnsupportedMessageException.create();
}
}
@ExportMessage
@TruffleBoundary
float asFloat() throws UnsupportedMessageException {
if (fitsInFloat()) {
return value.floatValue();
} else {
throw UnsupportedMessageException.create();
}
}
@ExportMessage
@TruffleBoundary
short asShort() throws UnsupportedMessageException {
if (fitsInShort()) {
return value.shortValue();
} else {
throw UnsupportedMessageException.create();
}
}
@ExportMessage
BigInteger asBigInteger() {
return value;
}
@ExportMessage
boolean hasLanguage() {
return true;
}
@ExportMessage
Class extends TruffleLanguage>> getLanguage() {
return SLLanguage.class;
}
@ExportMessage
boolean hasMetaObject() {
return true;
}
@ExportMessage
Object getMetaObject() {
return SLType.NUMBER;
}
@ExportMessage
@TruffleBoundary
Object toDisplayString(@SuppressWarnings("unused") boolean allowSideEffects) {
return value.toString();
}
}
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