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jeremybenn |
/* CniStubPrinter.java - Generate a CNI stub file
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Copyright (C) 2006, 2007 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.classpath.tools.javah;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.PrintStream;
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import java.lang.reflect.Modifier;
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import java.util.Iterator;
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import org.objectweb.asm.Type;
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import org.objectweb.asm.tree.MethodNode;
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public class CniStubPrinter
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extends Printer
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{
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protected CniStubPrinter(Main classpath, File outFile, boolean isDir,
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boolean force)
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{
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super(classpath, outFile, isDir, force);
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}
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private void printDecl(CniPrintStream out, String className, MethodNode method)
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{
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out.printName(className);
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out.print("::");
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out.printName(method.name);
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out.print("(");
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Type[] argTypes = Type.getArgumentTypes(method.desc);
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for (int j = 0; j < argTypes.length; ++j)
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{
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if (j > 0)
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out.print(", ");
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out.print(argTypes[j]);
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}
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out.print(")");
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}
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protected void writePreambleImpl(PrintStream out)
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{
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out.println("// This file is intended to give you a head start on implementing native");
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out.println("// methods using CNI.");
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out.println("// Be aware: running 'gcjh -stubs' once more for this class may");
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out.println("// overwrite any edits you have made to this file.");
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out.println();
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out.println("#include <gcj/cni.h>");
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out.println("#include <java/lang/UnsupportedOperationException.h>");
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}
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protected PrintStream getPrintStreamImpl(FileOutputStream fos,
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ClassWrapper klass)
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{
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return new CniPrintStream(fos);
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}
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public void printClass(File filename, ClassWrapper klass) throws IOException
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{
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if (! klass.hasNativeMethod())
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return;
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String className = klass.name.replaceAll("/", "::");
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CniPrintStream out = (CniPrintStream) getPrintStream(filename + ".cc",
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klass);
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if (out == null)
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return;
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out.println();
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out.println("#include <" + klass.name + ".h>");
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out.println();
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Iterator<?> i = klass.methods.iterator();
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boolean first = true;
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while (i.hasNext())
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{
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MethodNode method = (MethodNode) i.next();
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if (! Modifier.isNative(method.access))
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continue;
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if (! first)
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out.println();
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first = false;
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out.print(Type.getReturnType(method.desc));
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out.println();
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printDecl(out, className, method);
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out.println();
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out.println("{");
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out.print(" throw new ::java::lang::UnsupportedOperationException(");
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out.print("JvNewStringLatin1 (\"");
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printDecl(out, className, method);
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out.println("\"));");
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out.println("}");
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}
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out.close();
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}
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}
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