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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/CStringNode.java @ 19403:61d3cb8e1280

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Add generic parameter to NodeClass. Change Graph#getNodes(Class) to Graph#getNodes(NodeClass).
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Mon, 16 Feb 2015 17:47:43 +0100
parents 7e2c87dae93e
children 8fc336a04d77
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1 /*
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2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.hotspot.nodes;
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24
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25 import com.oracle.graal.api.meta.*;
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7e2c87dae93e Create static final NodeClass field named TYPE in Node subclasses.
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26 import com.oracle.graal.graph.*;
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27 import com.oracle.graal.nodeinfo.*;
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28 import com.oracle.graal.nodes.calc.*;
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29 import com.oracle.graal.nodes.spi.*;
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30 import com.oracle.graal.word.*;
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31
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32 /**
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33 * Converts a compile-time constant Java string into a C string installed with the generated code.
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34 */
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35 @NodeInfo
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36 public final class CStringNode extends FloatingNode implements LIRLowerable {
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37
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61d3cb8e1280 Add generic parameter to NodeClass. Change Graph#getNodes(Class) to Graph#getNodes(NodeClass).
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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38 public static final NodeClass<CStringNode> TYPE = NodeClass.get(CStringNode.class);
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39 protected final String string;
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40
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41 public CStringNode(String string) {
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42 super(TYPE, null);
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43 this.string = string;
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44 }
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45
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46 public void generate(NodeLIRBuilderTool gen) {
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47 gen.setResult(this, emitCString(gen, string));
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48 }
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49
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50 public static AllocatableValue emitCString(NodeLIRBuilderTool gen, String value) {
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51 AllocatableValue dst = gen.getLIRGeneratorTool().newVariable(LIRKind.value(gen.getLIRGeneratorTool().target().wordKind));
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52 gen.getLIRGeneratorTool().emitData(dst, toCString(value));
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53 return dst;
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54 }
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55
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56 /**
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57 * Converts a string to a null terminated byte array of ASCII characters.
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58 *
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59 * @param s a String that must only contain ASCII characters
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60 */
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61 public static byte[] toCString(String s) {
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62 byte[] bytes = new byte[s.length() + 1];
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63 for (int i = 0; i < s.length(); i++) {
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64 assert s.charAt(i) < 128 : "non-ascii string: " + s;
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65 bytes[i] = (byte) s.charAt(i);
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66 }
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67 bytes[s.length()] = 0;
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68 return bytes;
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69 }
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70
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71 @NodeIntrinsic(setStampFromReturnType = true)
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72 public static native Word cstring(@ConstantNodeParameter String string);
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73 }