com.oracle.truffle.api.strings.TStringConstants Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of truffle-api Show documentation
Show all versions of truffle-api Show documentation
Truffle is a multi-language framework for executing dynamic languages
that achieves high performance when combined with Graal.
/*
* Copyright (c) 2021, 2022, 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.api.strings;
import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
import com.oracle.truffle.api.TruffleSafepoint;
import com.oracle.truffle.api.nodes.LoopNode;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.api.strings.TruffleString.Encoding;
final class TStringConstants {
static final int MAX_ARRAY_SIZE = Integer.MAX_VALUE - 8;
static final int MAX_ARRAY_SIZE_S1 = MAX_ARRAY_SIZE >> 1;
static final int MAX_ARRAY_SIZE_S2 = MAX_ARRAY_SIZE >> 2;
@CompilationFinal(dimensions = 1) static final byte[] EMPTY_BYTES = new byte[0];
@CompilationFinal(dimensions = 2) private static final byte[][] SINGLE_BYTE_ARRAYS = new byte[256][1];
@CompilationFinal(dimensions = 1) private static final byte[] INFINITY_BYTES = {'I', 'n', 'f', 'i', 'n', 'i', 't', 'y'};
@CompilationFinal(dimensions = 1) private static final byte[] NaN_BYTES = {'N', 'a', 'N'};
private static final TruffleString INFINITY = TruffleString.createConstant(INFINITY_BYTES, INFINITY_BYTES.length, 0, Encoding.US_ASCII, INFINITY_BYTES.length, TSCodeRange.get7Bit());
private static final TruffleString NaN = TruffleString.createConstant(NaN_BYTES, NaN_BYTES.length, 0, Encoding.US_ASCII, NaN_BYTES.length, TSCodeRange.get7Bit());
@CompilationFinal(dimensions = 2) private static final TruffleString[][] SINGLE_BYTE = new TruffleString[Encodings.SUPPORTED_ENCODINGS_MAX_NUM][];
/**
* Minimum combined length of two strings for lazy concatenation.
*/
static final int LAZY_CONCAT_MIN_LENGTH = 40;
static {
for (int i = Encodings.SUPPORTED_ENCODINGS_MIN_NUM; i < Encodings.SUPPORTED_ENCODINGS_MAX_NUM; i++) {
SINGLE_BYTE[i] = new TruffleString[256];
}
for (int i = 0; i < 128; i++) {
SINGLE_BYTE_ARRAYS[i][0] = (byte) i;
SINGLE_BYTE[Encodings.SUPPORTED_ENCODINGS_MIN_NUM][i] = TruffleString.createConstant(SINGLE_BYTE_ARRAYS[i], 1, 0, Encoding.US_ASCII, 1, TSCodeRange.get7Bit());
for (int j = Encodings.SUPPORTED_ENCODINGS_MIN_NUM + 1; j < Encodings.SUPPORTED_ENCODINGS_MAX_NUM; j++) {
SINGLE_BYTE[j][i] = SINGLE_BYTE[Encodings.SUPPORTED_ENCODINGS_MIN_NUM][i];
}
}
for (int i = 128; i < 256; i++) {
SINGLE_BYTE_ARRAYS[i][0] = (byte) i;
for (int j = Encodings.SUPPORTED_ENCODINGS_MIN_NUM; j < Encodings.SUPPORTED_ENCODINGS_MAX_NUM; j++) {
SINGLE_BYTE[j][i] = TruffleString.createConstant(SINGLE_BYTE_ARRAYS[i], 1, 0, Encoding.get(j), 1, nonAsciiCodeRange(Encoding.get(j)));
}
}
}
private static int nonAsciiCodeRange(Encoding encoding) {
if (TStringGuards.isAsciiBytesOrLatin1(encoding)) {
return TSCodeRange.asciiLatinBytesNonAsciiCodeRange(encoding);
}
if (TStringGuards.isUTF8(encoding)) {
return TSCodeRange.getBrokenMultiByte();
}
return TSCodeRange.get8Bit();
}
static TruffleString getInfinity(int encoding) {
if (AbstractTruffleString.DEBUG_STRICT_ENCODING_CHECKS) {
return createAscii(INFINITY_BYTES, Encoding.get(encoding));
}
return INFINITY;
}
static TruffleString getNaN(int encoding) {
if (AbstractTruffleString.DEBUG_STRICT_ENCODING_CHECKS) {
return createAscii(NaN_BYTES, Encoding.get(encoding));
}
return NaN;
}
static TruffleString getSingleByteAscii(Encoding encoding, int value) {
if (AbstractTruffleString.DEBUG_STRICT_ENCODING_CHECKS) {
return createAscii(SINGLE_BYTE_ARRAYS[value], encoding);
}
if (TStringGuards.isUnsupportedEncoding(encoding)) {
return SINGLE_BYTE[Encoding.US_ASCII.id][value];
}
return SINGLE_BYTE[encoding.id][value];
}
static TruffleString getSingleByte(Encoding encoding, int value) {
if (AbstractTruffleString.DEBUG_STRICT_ENCODING_CHECKS && value <= 0x7f) {
return createAscii(SINGLE_BYTE_ARRAYS[value], encoding);
}
return SINGLE_BYTE[encoding.id][value];
}
private static TruffleString createAscii(byte[] array, Encoding encoding) {
return TruffleString.createFromByteArray(array, array.length, 0, encoding, array.length, TSCodeRange.getAsciiCodeRange(encoding), true);
}
static void truffleSafePointPoll(Node location, int loopCount) {
// poll once in a million iterations to reduce overhead
if ((loopCount & 0xf_ffff) == 0) {
TruffleSafepoint.poll(location);
LoopNode.reportLoopCount(location, 0x10_0000);
}
}
}