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[Truffle] Replaced awkward non-standard String method with a Truffle …
…helper.
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62
truffle/src/main/java/org/jruby/truffle/core/string/TruffleStringNodes.java
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/* | ||
* Copyright (c) 2016 Oracle and/or its affiliates. All rights reserved. This | ||
* code is released under a tri EPL/GPL/LGPL license. You can use it, | ||
* redistribute it and/or modify it under the terms of the: | ||
* | ||
* Eclipse Public License version 1.0 | ||
* GNU General Public License version 2 | ||
* GNU Lesser General Public License version 2.1 | ||
*/ | ||
package org.jruby.truffle.core.string; | ||
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import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary; | ||
import com.oracle.truffle.api.dsl.Cached; | ||
import com.oracle.truffle.api.dsl.Specialization; | ||
import com.oracle.truffle.api.object.DynamicObject; | ||
import org.jruby.truffle.builtins.CoreClass; | ||
import org.jruby.truffle.builtins.CoreMethod; | ||
import org.jruby.truffle.builtins.CoreMethodArrayArgumentsNode; | ||
import org.jruby.truffle.core.rope.Rope; | ||
import org.jruby.truffle.core.rope.RopeNodes; | ||
import org.jruby.truffle.language.RubyGuards; | ||
import org.jruby.truffle.language.control.RaiseException; | ||
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import static org.jruby.truffle.core.string.StringOperations.rope; | ||
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@CoreClass("Truffle::String") | ||
public class TruffleStringNodes { | ||
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@CoreMethod(names = "truncate", onSingleton = true, required = 2, lowerFixnumParameters = 1) | ||
public abstract static class TruncateNode extends CoreMethodArrayArgumentsNode { | ||
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@Specialization(guards = { "isRubyString(string)", "isNewLengthTooLarge(string, newByteLength)" }) | ||
@TruffleBoundary | ||
public DynamicObject truncateError(DynamicObject string, int newByteLength) { | ||
throw new RaiseException( | ||
getContext().getCoreExceptions().argumentError(formatError(newByteLength, rope(string)), this)); | ||
} | ||
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@Specialization(guards = { "isRubyString(string)" }) | ||
public DynamicObject stealStorage(DynamicObject string, int newByteLength, | ||
@Cached("createX()") RopeNodes.MakeSubstringNode makeSubstringNode) { | ||
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StringOperations.setRope(string, makeSubstringNode.executeMake(rope(string), 0, newByteLength)); | ||
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return string; | ||
} | ||
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protected static boolean isNewLengthTooLarge(DynamicObject string, int newByteLength) { | ||
assert RubyGuards.isRubyString(string); | ||
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return newByteLength > rope(string).byteLength(); | ||
} | ||
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@TruffleBoundary | ||
private String formatError(int count, final Rope rope) { | ||
return String.format("Invalid byte count: %d exceeds string size of %d bytes", count, rope.byteLength()); | ||
} | ||
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} | ||
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} |
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