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jeremybenn |
/* JniPrintStream.java - PrintStream that emits JNI declarations
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Copyright (C) 2006 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.IOException;
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import java.io.OutputStream;
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import java.io.PrintStream;
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import java.lang.reflect.Modifier;
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import java.util.HashMap;
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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 JniPrintStream
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extends PrintStream
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{
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Main classpath;
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// This is used to determine whether a method has an overload.
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HashMap<String,Integer> methodNameMap = new HashMap<String,Integer>();
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public JniPrintStream(Main classpath, OutputStream out, ClassWrapper klass)
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{
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super(out);
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this.classpath = classpath;
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computeOverloads(klass);
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}
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private void computeOverloads(ClassWrapper klass)
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{
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Iterator<?> i = klass.methods.iterator();
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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 (methodNameMap.containsKey(method.name))
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{
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Integer val = methodNameMap.get(method.name);
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methodNameMap.put(method.name, Integer.valueOf(val.intValue() + 1));
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}
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else
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methodNameMap.put(method.name, Integer.valueOf(1));
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}
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}
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public void print(Type type) throws IOException
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{
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print(JniHelper.getName(classpath, type));
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}
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public void print(MethodNode method, String className) throws IOException
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{
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print("Java_");
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print(className);
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print("_");
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print(JniHelper.mangle(method.name));
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Integer overloadCount = (Integer) methodNameMap.get(method.name);
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if (overloadCount.intValue() > 1)
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{
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print("__");
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int lastOffset = method.desc.lastIndexOf(')');
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print(JniHelper.mangle(method.desc.substring(1, lastOffset)));
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}
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print(" (JNIEnv *env");
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if (Modifier.isStatic(method.access))
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print(", jclass");
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else
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print(", jobject");
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Type[] types = Type.getArgumentTypes(method.desc);
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for (int i = 0; i < types.length; ++i)
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{
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print(", ");
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print(types[i]);
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}
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print(")");
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}
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}
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