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/*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*
* Sun gratefully acknowledges that this software was originally authored
* and developed by Kenneth Bradley Russell and Christopher John Kline.
*/
package com.sun.gluegen.nativesig;
import java.io.*;
import java.util.*;
import com.sun.gluegen.*;
import com.sun.gluegen.cgram.types.*;
import com.sun.gluegen.opengl.*;
import com.sun.gluegen.procaddress.*;
/** Emitter producing NativeSignature attributes. */
public class NativeSignatureEmitter extends GLEmitter {
protected List generateMethodBindingEmitters(HashSet/*<MethodBinding>*/ methodBindingSet, FunctionSymbol sym) throws Exception {
// Allow superclass to do most of the work for us
List res = super.generateMethodBindingEmitters(methodBindingSet, sym);
// Filter out all non-JavaMethodBindingEmitters
for (Iterator iter = res.iterator(); iter.hasNext(); ) {
FunctionEmitter emitter = (FunctionEmitter) iter.next();
if (!(emitter instanceof JavaMethodBindingEmitter)) {
iter.remove();
}
}
if (res.isEmpty()) {
return res;
}
PrintWriter writer = (getConfig().allStatic() ? javaWriter() : javaImplWriter());
List processed = new ArrayList();
// First, filter out all emitters going to the "other" (public) writer
for (Iterator iter = res.iterator(); iter.hasNext(); ) {
FunctionEmitter emitter = (FunctionEmitter) iter.next();
if (emitter.getDefaultOutput() != writer) {
processed.add(emitter);
iter.remove();
}
}
// Now process all of the remaining emitters sorted by MethodBinding
while (!res.isEmpty()) {
List emittersForBinding = new ArrayList();
JavaMethodBindingEmitter emitter = (JavaMethodBindingEmitter) res.remove(0);
emittersForBinding.add(emitter);
MethodBinding binding = emitter.getBinding();
for (Iterator iter = res.iterator(); iter.hasNext(); ) {
JavaMethodBindingEmitter emitter2 = (JavaMethodBindingEmitter) iter.next();
if (emitter2.getBinding() == binding) {
emittersForBinding.add(emitter2);
iter.remove();
}
}
generateNativeSignatureEmitters(binding, emittersForBinding);
processed.addAll(emittersForBinding);
}
return processed;
}
protected void generateNativeSignatureEmitters(MethodBinding binding,
List allEmitters) {
if (allEmitters.isEmpty()) {
return;
}
PrintWriter writer = (getConfig().allStatic() ? javaWriter() : javaImplWriter());
// Give ourselves the chance to interpose on the generation of all code to keep things simple
List newEmitters = new ArrayList();
for (Iterator iter = allEmitters.iterator(); iter.hasNext(); ) {
JavaMethodBindingEmitter javaEmitter = (JavaMethodBindingEmitter) iter.next();
NativeSignatureJavaMethodBindingEmitter newEmitter = null;
if (javaEmitter instanceof GLJavaMethodBindingEmitter) {
newEmitter = new NativeSignatureJavaMethodBindingEmitter((GLJavaMethodBindingEmitter) javaEmitter);
} else if (javaEmitter instanceof ProcAddressJavaMethodBindingEmitter) {
newEmitter = new NativeSignatureJavaMethodBindingEmitter((ProcAddressJavaMethodBindingEmitter) javaEmitter);
} else {
newEmitter = new NativeSignatureJavaMethodBindingEmitter(javaEmitter, this);
}
newEmitters.add(newEmitter);
}
allEmitters.clear();
allEmitters.addAll(newEmitters);
// Detect whether we need to produce more or modify some of these emitters.
// Note that at this point we are assuming that generatePublicEmitters has
// been called with signatureOnly both true and false.
if (signatureContainsStrings(binding) &&
!haveEmitterWithBody(allEmitters)) {
// This basically handles glGetString but also any similar methods
NativeSignatureJavaMethodBindingEmitter javaEmitter = findEmitterWithWriter(allEmitters, writer);
// First, we need to clone this emitter to produce the native
// entry point
NativeSignatureJavaMethodBindingEmitter emitter =
new NativeSignatureJavaMethodBindingEmitter(javaEmitter);
emitter.removeModifier(JavaMethodBindingEmitter.PUBLIC);
emitter.addModifier(JavaMethodBindingEmitter.PRIVATE);
emitter.setForImplementingMethodCall(true);
// Note: this is chosen so we don't have to change the logic in
// emitReturnVariableSetupAndCall which decides which variant
// (direct / indirect) to call
emitter.setForDirectBufferImplementation(true);
allEmitters.add(emitter);
// Now make the original emitter non-native and cause it to emit a body
javaEmitter.removeModifier(JavaMethodBindingEmitter.NATIVE);
javaEmitter.setEmitBody(true);
}
}
protected boolean signatureContainsStrings(MethodBinding binding) {
for (int i = 0; i < binding.getNumArguments(); i++) {
JavaType type = binding.getJavaArgumentType(i);
if (type.isString() || type.isStringArray()) {
return true;
}
}
JavaType retType = binding.getJavaReturnType();
if (retType.isString() || retType.isStringArray()) {
return true;
}
return false;
}
protected boolean haveEmitterWithBody(List allEmitters) {
for (Iterator iter = allEmitters.iterator(); iter.hasNext(); ) {
JavaMethodBindingEmitter emitter = (JavaMethodBindingEmitter) iter.next();
if (!emitter.signatureOnly()) {
return true;
}
}
return false;
}
protected NativeSignatureJavaMethodBindingEmitter findEmitterWithWriter(List allEmitters, PrintWriter writer) {
for (Iterator iter = allEmitters.iterator(); iter.hasNext(); ) {
NativeSignatureJavaMethodBindingEmitter emitter =
(NativeSignatureJavaMethodBindingEmitter) iter.next();
if (emitter.getDefaultOutput() == writer) {
return emitter;
}
}
throw new RuntimeException("Unexpectedly failed to find an emitter with the given writer");
}
}
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