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annotate graal/com.oracle.max.criutils/src/com/oracle/max/criutils/JniMangle.java @ 5372:4485e0edd1af

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made CheckCastNode be a FixedNode instead of a BooleanNode
author Doug Simon <doug.simon@oracle.com>
date Thu, 10 May 2012 00:36:12 +0200
parents 4c3d953f8131
children dc71b06d09f8
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5346
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1 /*
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2 * Copyright (c) 2007, 2011, 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.max.criutils;
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24
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25 import com.oracle.max.cri.ci.*;
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26 import com.oracle.max.cri.ri.*;
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27
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28 /**
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29 * A utility for mangling Java method name and signatures into C function names.
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30 *
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31 * @see "http://java.sun.com/j2se/1.5.0/docs/guide/jni/spec/design.html#wp615"
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32 */
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33 public final class JniMangle {
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34
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35 private JniMangle() {
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36 }
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37
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38 /**
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39 * Mangles a given string such that it can be represented as (part of) a valid C function name.
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40 */
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41 private static String mangle(String name) {
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42 final StringBuilder mangledName = new StringBuilder(100);
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43 final int length = name.length();
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44 for (int i = 0; i < length; i++) {
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45 final char ch = name.charAt(i);
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46 if (isAlphaNumeric(ch)) {
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47 mangledName.append(ch);
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48 } else if (ch == '_') {
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49 mangledName.append("_1");
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50 } else if (ch == '.') {
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51 mangledName.append("_");
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52 } else if (ch == ';') {
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53 mangledName.append("_2");
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54 } else if (ch == '[') {
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55 mangledName.append("_3");
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56 } else {
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57 mangledName.append(String.format("%04x", (int) ch));
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58 }
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59 }
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60 return mangledName.toString();
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61 }
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62
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63 /**
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64 * The delimiter in the string returned by {@link #mangleMethod(TypeDescriptor, String, SignatureDescriptor, boolean)} separating
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65 * the short mangled form from the suffix to be added to obtain the long mangled form.
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66 */
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67 public static final char LONG_NAME_DELIMITER = ' ';
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68
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69 /**
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70 * Mangles a Java method to the symbol(s) to be used when binding it to a native function.
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71 * If {@code signature} is {@code null}, then a non-qualified symbol is returned.
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72 * Otherwise, a qualified symbol is returned. A qualified symbol has its non-qualified
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73 * prefix separated from its qualifying suffix by {@link #LONG_NAME_DELIMITER} if
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74 * {@code splitSuffix} is {@code true}.
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75 *
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76 * @param declaringClass a fully qualified class descriptor
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77 * @param name a Java method name (not checked here for validity)
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78 * @param signature if non-null, a method signature to include in the mangled name
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79 * @param splitSuffix determines if {@link #LONG_NAME_DELIMITER} should be used as described above
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80 * @return the symbol for the C function as described above
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81 */
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82 public static String mangleMethod(RiResolvedType declaringClass, String name, RiSignature signature, boolean splitSuffix) {
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83 final StringBuilder result = new StringBuilder(100);
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84 final String declaringClassName = CiUtil.toJavaName(declaringClass);
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85 result.append("Java_").append(mangle(declaringClassName)).append('_').append(mangle(name));
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86 if (signature != null) {
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87 if (splitSuffix) {
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88 result.append(LONG_NAME_DELIMITER);
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89 }
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90 result.append("__");
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91 final String sig = signature.asString();
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92 final String parametersSignature = sig.substring(1, sig.lastIndexOf(')')).replace('/', '.').replace('$', '.');
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93 result.append(mangle(parametersSignature));
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94 }
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95 return result.toString();
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96 }
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97
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98 private static boolean isAlphaNumeric(char ch) {
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99 return (ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z') || (ch >= '0' && ch <= '9');
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100 }
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101 }