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/**
* Copyright 2023 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions 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.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package com.jogamp.gluegen;
import java.io.IOException;
import java.util.List;
/**
* C code unit (a generated C source file),
* covering multiple {@link FunctionEmitter} allowing to unify output, decoration and dynamic helper code injection per unit.
**/
public class CCodeUnit extends CodeUnit {
/** base c-unit name with suffix. */
public final String cUnitName;
/**
* @param filename the class's full filename to open w/ write access
* @param cUnitName the base c-unit name, i.e. c-file basename with suffix
* @param generator informal optional object that is creating this unit, used to be mentioned in a warning message if not null.
* @throws IOException
*/
public CCodeUnit(final String filename, final String cUnitName, final Object generator) throws IOException {
super(filename, generator);
this.cUnitName = cUnitName;
CodeGenUtils.emitAutogeneratedWarning(output, generator, "C-Unit: "+cUnitName+", "+filename);
}
public void emitHeader(final String packageName, final String className, final List<String> customCode) {
emitln("#include <jni.h>");
emitln("#include <stdlib.h>");
emitln("#include <string.h>");
emitln("#include <assert.h>");
emitln("#include <stddef.h>");
emitln();
emitln("static jobject JVMUtil_NewDirectByteBufferCopy(JNIEnv *env, jclass clazzBuffers, void * source_address, size_t capacity); /* forward decl. */");
emitln();
boolean addNewDirectByteBufferCopyUnitCode = false;
for (final String code : customCode) {
emitln(code);
addNewDirectByteBufferCopyUnitCode = addNewDirectByteBufferCopyUnitCode || code.contains("JVMUtil_NewDirectByteBufferCopy");
}
emitln();
if( addNewDirectByteBufferCopyUnitCode ) {
addTailCode(NewDirectByteBufferCopyUnitCode); // potentially used...
}
}
@Override
public String toString() { return "CCodeUnit[unit "+cUnitName+", file "+filename+"]"; }
public static final String NewDirectByteBufferCopyUnitCode =
"static const char * nameCopyNativeToDirectByteBuffer = \"copyNativeToDirectByteBuffer\";\n"+
"static const char * nameCopyNativeToDirectByteBufferSignature = \"(JJ)Ljava/nio/ByteBuffer;\";\n"+
"\n"+
"static jobject JVMUtil_NewDirectByteBufferCopy(JNIEnv *env, jclass clazzBuffers, void * source_address, size_t capacity) {\n"+
" jmethodID cstrBuffersNew = (*env)->GetStaticMethodID(env, clazzBuffers, nameCopyNativeToDirectByteBuffer, nameCopyNativeToDirectByteBufferSignature);\n"+
" if(NULL==cstrBuffersNew) {\n"+
" fprintf(stderr, \"Can't get method Buffers.%s(%s)\\n\", nameCopyNativeToDirectByteBuffer, nameCopyNativeToDirectByteBufferSignature);\n"+
" (*env)->FatalError(env, nameCopyNativeToDirectByteBuffer);\n"+
" return JNI_FALSE;\n"+
" }\n"+
" jobject jbyteBuffer = (*env)->CallStaticObjectMethod(env, clazzBuffers, cstrBuffersNew, (jlong)(intptr_t)source_address, (jlong)capacity);\n"+
" if( (*env)->ExceptionCheck(env) ) {\n"+
" (*env)->ExceptionDescribe(env);\n"+
" (*env)->ExceptionClear(env);\n"+
" (*env)->FatalError(env, \"Exception occurred\");\n"+
" return NULL;\n"+
" }\n"+
" return jbyteBuffer;\n"+
"}\n";
}
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