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Truffle is a multi-language framework for executing dynamic languages
that achieves high performance when combined with Graal.
/*
* Copyright (c) 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
* 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
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.oracle.truffle.host;
import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.interop.UnsupportedMessageException;
/**
* Separate class for host utilities accessible by the accessor in order to avoid class loading of
* host interop code.
*/
final class HostUtil {
private HostUtil() {
// no instances
}
static Object convertLossLess(Object value, Class requestedType, InteropLibrary interop) {
try {
if (interop.isNumber(value)) {
if (requestedType == byte.class || requestedType == Byte.class) {
return interop.asByte(value);
} else if (requestedType == short.class || requestedType == Short.class) {
return interop.asShort(value);
} else if (requestedType == int.class || requestedType == Integer.class) {
return interop.asInt(value);
} else if (requestedType == long.class || requestedType == Long.class) {
return interop.asLong(value);
} else if (requestedType == float.class || requestedType == Float.class) {
return interop.asFloat(value);
} else if (requestedType == double.class || requestedType == Double.class) {
return interop.asDouble(value);
} else if (requestedType == Number.class) {
return convertToNumber(value, interop);
}
} else if (interop.isBoolean(value)) {
if (requestedType == boolean.class || requestedType == Boolean.class) {
return interop.asBoolean(value);
}
} else if (interop.isString(value)) {
if (requestedType == char.class || requestedType == Character.class) {
String str = interop.asString(value);
if (str.length() == 1) {
return str.charAt(0);
}
} else if (requestedType == String.class || requestedType == CharSequence.class) {
return interop.asString(value);
}
}
} catch (UnsupportedMessageException e) {
}
return null;
}
static Object convertToNumber(Object value, InteropLibrary interop) {
try {
if (value instanceof HostMethodScope.ScopedObject) {
HostMethodScope.ScopedObject s = (HostMethodScope.ScopedObject) value;
Object delegate = s.delegate;
if (delegate instanceof Number) {
return delegate;
}
}
if (value instanceof Number) {
return value;
} else if (interop.fitsInByte(value)) {
return interop.asByte(value);
} else if (interop.fitsInShort(value)) {
return interop.asShort(value);
} else if (interop.fitsInInt(value)) {
return interop.asInt(value);
} else if (interop.fitsInLong(value)) {
return interop.asLong(value);
} else if (interop.fitsInFloat(value)) {
return interop.asFloat(value);
} else if (interop.fitsInDouble(value)) {
return interop.asDouble(value);
}
} catch (UnsupportedMessageException e) {
}
return null;
}
static Object convertLossy(Object value, Class targetType, InteropLibrary interop) {
if (targetType == char.class || targetType == Character.class) {
if (interop.fitsInInt(value)) {
try {
int v = interop.asInt(value);
if (v >= 0 && v < 65536) {
return (char) v;
}
} catch (UnsupportedMessageException e) {
CompilerDirectives.shouldNotReachHere(e);
}
}
}
return null;
}
}