416 lines
19 KiB
Java
416 lines
19 KiB
Java
/*
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* Copyright (c) 2002-2008 LWJGL Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'LWJGL' nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.lwjgl.util.generator;
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/**
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*
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* This class generates the functions in the native source files.
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*
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* @author elias_naur <elias_naur@users.sourceforge.net>
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* @version $Revision$
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* $Id$
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*/
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import org.lwjgl.PointerBuffer;
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import java.io.PrintWriter;
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import java.nio.Buffer;
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import java.util.List;
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import javax.annotation.processing.ProcessingEnvironment;
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import javax.lang.model.element.Element;
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import javax.lang.model.element.ExecutableElement;
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import javax.lang.model.element.TypeElement;
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import javax.lang.model.element.VariableElement;
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import javax.lang.model.type.TypeKind;
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import javax.lang.model.type.TypeMirror;
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public class NativeMethodStubsGenerator {
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private static final String BUFFER_ADDRESS_POSTFIX = "_address";
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public static final String BUFFER_POSITION_POSTFIX = "_position";
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private static final String STRING_LIST_NAME = "_str";
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private static final String POINTER_LIST_NAME = "_ptr";
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public static void generateNativeMethodStubs(ProcessingEnvironment env, TypeMap type_map, PrintWriter writer, TypeElement d, boolean generate_error_checks, boolean context_specific) {
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for ( ExecutableElement method : Utils.getMethods(d) ) {
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Alternate alt_annotation = method.getAnnotation(Alternate.class);
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if ( (alt_annotation != null && (!alt_annotation.nativeAlt() || alt_annotation.skipNative())) || method.getAnnotation(Reuse.class) != null )
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continue;
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generateMethodStub(env, type_map, writer, Utils.getQualifiedClassName(d), method, Mode.NORMAL, generate_error_checks, context_specific);
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if ( Utils.hasMethodBufferObjectParameter(method) )
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generateMethodStub(env, type_map, writer, Utils.getQualifiedClassName(d), method, Mode.BUFFEROBJECT, generate_error_checks, context_specific);
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}
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}
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private static void generateParameters(PrintWriter writer, List<? extends VariableElement> params, Mode mode) {
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for ( VariableElement param : params ) {
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if ( param.getAnnotation(Result.class) != null || (param.getAnnotation(Helper.class) != null && !param.getAnnotation(Helper.class).passToNative()) )
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continue;
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final Constant constant_annotation = param.getAnnotation(Constant.class);
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if ( constant_annotation == null || !constant_annotation.isNative() )
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generateParameter(writer, param, mode);
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}
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}
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private static void generateParameter(PrintWriter writer, VariableElement param, Mode mode) {
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writer.print(", ");
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if ( mode == Mode.BUFFEROBJECT && param.getAnnotation(BufferObject.class) != null ) {
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writer.print("jlong " + param.getSimpleName() + Utils.BUFFER_OBJECT_PARAMETER_POSTFIX);
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} else if ( param.getAnnotation(PointerWrapper.class) != null ) {
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writer.print("jlong " + param.getSimpleName());
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} else {
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JNITypeTranslator translator = new JNITypeTranslator();
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param.asType().accept(translator, null);
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writer.print(translator.getSignature() + " " + param.getSimpleName());
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}
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}
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private static void generateMethodStub(ProcessingEnvironment env, TypeMap type_map, PrintWriter writer, String interface_name, ExecutableElement method, Mode mode, boolean generate_error_checks, boolean context_specific) {
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if ( !context_specific && method.getAnnotation(Alternate.class) == null )
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writer.print("static ");
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else
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writer.print("JNIEXPORT ");
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final TypeMirror result_type = Utils.getMethodReturnType(method);
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final CachedResult cached_result_annotation = method.getAnnotation(CachedResult.class);
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final AutoSize auto_size_annotation = method.getAnnotation(AutoSize.class);
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if ( method.getAnnotation(PointerWrapper.class) != null ) {
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writer.print("jlong");
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} else {
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JNITypeTranslator translator = new JNITypeTranslator();
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result_type.accept(translator, null);
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writer.print(translator.getReturnSignature());
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}
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writer.print(" JNICALL ");
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writer.print(Utils.getQualifiedNativeMethodName(interface_name, method, generate_error_checks, context_specific));
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if ( mode == Mode.BUFFEROBJECT )
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writer.print(Utils.BUFFER_OBJECT_METHOD_POSTFIX);
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writer.print("(JNIEnv *env, jclass clazz");
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generateParameters(writer, method.getParameters(), mode);
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if ( Utils.getNIOBufferType(result_type) != null ) {
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if ( (cached_result_annotation == null || !cached_result_annotation.isRange()) && (auto_size_annotation == null || !auto_size_annotation.isNative()) )
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writer.print(", jlong " + Utils.RESULT_SIZE_NAME);
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if ( cached_result_annotation != null )
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writer.print(", jobject " + Utils.CACHED_BUFFER_NAME);
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}
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if ( context_specific ) {
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writer.print(", jlong " + Utils.FUNCTION_POINTER_VAR_NAME);
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}
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writer.println(") {");
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generateBufferParameterAddresses(type_map, writer, method, mode);
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Alternate alt_annotation = method.getAnnotation(Alternate.class);
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if ( context_specific ) {
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String typedef_name = Utils.getTypedefName(method);
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writer.print("\t" + typedef_name + " " + (alt_annotation == null ? method.getSimpleName() : alt_annotation.value()));
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writer.print(" = (" + typedef_name + ")((intptr_t)");
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writer.println(Utils.FUNCTION_POINTER_VAR_NAME + ");");
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}
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final Code code_annotation = method.getAnnotation(Code.class);
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final boolean hasResult = !result_type.equals(env.getTypeUtils().getNoType(TypeKind.VOID));
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final boolean resultPreDeclare = hasResult && (hasPointerArrayInits(method.getParameters()) || (code_annotation != null && (code_annotation.nativeAfterVars().length() > 0 || code_annotation.nativeBeforeCall().length() > 0)));
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if ( resultPreDeclare )
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printResultParam(type_map, writer, method, result_type, true);
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if ( code_annotation != null && code_annotation.nativeAfterVars().length() > 0 )
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writer.println(code_annotation.nativeAfterVars());
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generatePointerArrayInits(type_map, writer, method.getParameters());
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if ( code_annotation != null && code_annotation.nativeBeforeCall().length() > 0 )
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writer.println(code_annotation.nativeBeforeCall());
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writer.print("\t");
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if ( resultPreDeclare )
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writer.print(Utils.RESULT_VAR_NAME + " = ");
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else if ( hasResult )
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printResultParam(type_map, writer, method, result_type, false);
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writer.print((alt_annotation == null ? method.getSimpleName() : alt_annotation.value()) + "(");
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generateCallParameters(writer, type_map, method.getParameters());
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writer.print(")");
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writer.println(";");
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if ( code_annotation != null && code_annotation.nativeAfterCall().length() > 0 )
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writer.println(code_annotation.nativeAfterCall());
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generateStringDeallocations(writer, method.getParameters());
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if ( !result_type.equals(env.getTypeUtils().getNoType(TypeKind.VOID)) ) {
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writer.print("\treturn ");
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Class java_result_type = Utils.getJavaType(result_type);
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if ( Buffer.class.isAssignableFrom(java_result_type) ) {
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if ( cached_result_annotation != null )
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writer.print("safeNewBufferCached(env, ");
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else
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writer.print("safeNewBuffer(env, ");
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} else if ( String.class.equals(java_result_type) ) {
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writer.print("NewStringNativeUnsigned(env, ");
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} else if ( method.getAnnotation(PointerWrapper.class) != null ) {
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writer.print("(intptr_t)");
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}
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writer.print(Utils.RESULT_VAR_NAME);
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if ( Buffer.class.isAssignableFrom(java_result_type) ) {
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final String size_parameter_name;
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if ( auto_size_annotation != null && (auto_size_annotation.isNative() || (cached_result_annotation != null && cached_result_annotation.isRange())) )
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size_parameter_name = auto_size_annotation.value();
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else
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size_parameter_name = Utils.RESULT_SIZE_NAME;
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writer.print(", ");
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Utils.printExtraCallArguments(writer, method, size_parameter_name);
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}
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if ( Buffer.class.isAssignableFrom(java_result_type) ||
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String.class.equals(java_result_type) )
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writer.print(")");
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writer.println(";");
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}
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writer.println("}");
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writer.println();
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}
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private static void printResultParam(final TypeMap type_map, final PrintWriter writer, final ExecutableElement method, final TypeMirror result_type, final boolean preDeclare) {
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final VariableElement result_param = Utils.getResultParameter(method);
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final Element return_declaration = result_param == null ? method : result_param;
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final NativeTypeTranslator result_translator = new NativeTypeTranslator(type_map, return_declaration);
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result_type.accept(result_translator, null);
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if ( preDeclare )
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writer.print("\t");
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writer.print(result_translator.getSignature() + " " + Utils.RESULT_VAR_NAME);
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if ( preDeclare )
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writer.println(";");
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else
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writer.print(result_param == null ? " = " : ";\n\t");
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}
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private static void generateCallParameters(PrintWriter writer, TypeMap type_map, List<? extends VariableElement> params) {
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if ( params.size() > 0 ) {
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boolean first = true;
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for ( VariableElement param : params ) {
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if ( param.getAnnotation(Helper.class) != null )
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continue;
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if ( first )
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first = false;
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else
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writer.print(", ");
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generateCallParameter(writer, type_map, param);
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}
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}
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}
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private static void generateCallParameter(PrintWriter writer, TypeMap type_map, VariableElement param) {
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if ( param.getAnnotation(Helper.class) != null )
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return;
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final Constant constant_annotation = param.getAnnotation(Constant.class);
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if ( constant_annotation != null && constant_annotation.isNative() ) {
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writer.print(constant_annotation.value());
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return;
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}
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boolean is_indirect = param.getAnnotation(Indirect.class) != null;
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if ( is_indirect || param.getAnnotation(PointerArray.class) != null ) {
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writer.print("(");
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final NativeTypeTranslator translator = new NativeTypeTranslator(type_map, param);
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param.asType().accept(translator, null);
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writer.print(translator.getSignature());
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writer.print("*)");
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}
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if ( param.getAnnotation(PointerWrapper.class) != null )
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writer.print("(" + param.getAnnotation(PointerWrapper.class).value() + ")(intptr_t)");
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if ( param.getAnnotation(Result.class) != null || is_indirect )
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writer.print("&");
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if ( param.getAnnotation(Result.class) != null ) {
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writer.print(Utils.RESULT_VAR_NAME);
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} else {
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writer.print(param.getSimpleName());
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if ( param.getAnnotation(PointerArray.class) != null )
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writer.print(getPointerArrayName(Utils.getJavaType(param.asType())));
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else if ( Utils.isAddressableType(param.asType()) )
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writer.print(BUFFER_ADDRESS_POSTFIX);
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}
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}
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private static void generateStringDeallocations(PrintWriter writer, List<? extends VariableElement> params) {
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for ( VariableElement param : params ) {
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final Class java_type = Utils.getJavaType(param.asType());
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if ( java_type.equals(String.class) && param.getAnnotation(Result.class) == null )
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writer.println("\tfree(" + param.getSimpleName() + BUFFER_ADDRESS_POSTFIX + ");");
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else if ( param.getAnnotation(PointerArray.class) != null ) // Free the string array mem
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writer.println("\tfree(" + param.getSimpleName() + getPointerArrayName(java_type) + ");");
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}
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}
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private static void generateBufferParameterAddresses(TypeMap type_map, PrintWriter writer, ExecutableElement method, Mode mode) {
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strLoopDeclared = false;
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ptrLoopDeclared = false;
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for ( VariableElement param : method.getParameters() ) {
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final Constant constant_annotation = param.getAnnotation(Constant.class);
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if ( param.getAnnotation(Result.class) == null && (constant_annotation == null || !constant_annotation.isNative()) && Utils.isAddressableType(param.asType()) )
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generateBufferParameterAddress(type_map, writer, param, mode);
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}
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}
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private static boolean strLoopDeclared;
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private static boolean ptrLoopDeclared;
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private static void generateBufferParameterAddress(TypeMap type_map, PrintWriter writer, VariableElement param, Mode mode) {
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final Check check_annotation = param.getAnnotation(Check.class);
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final PointerArray array_annotation = param.getAnnotation(PointerArray.class);
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final Class java_type = Utils.getJavaType(param.asType());
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final NativeTypeTranslator translator = new NativeTypeTranslator(type_map, param);
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param.asType().accept(translator, null);
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final String native_type = translator.getSignature();
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if ( !java_type.isArray() || CharSequence.class.isAssignableFrom(java_type.getComponentType()) ) {
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writer.print("\t" + native_type + param.getSimpleName());
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writer.print(BUFFER_ADDRESS_POSTFIX + " = (");
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writer.print(native_type);
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writer.print(")(intptr_t)");
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if ( mode == Mode.BUFFEROBJECT && param.getAnnotation(BufferObject.class) != null ) {
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writer.print("offsetToPointer(" + param.getSimpleName() + Utils.BUFFER_OBJECT_PARAMETER_POSTFIX + ")");
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} else {
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if ( Buffer.class.isAssignableFrom(java_type) || java_type.equals(CharSequence.class) || java_type.equals(CharSequence[].class) || PointerBuffer.class.isAssignableFrom(java_type) ) {
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writer.print(param.getSimpleName());
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} else if ( java_type.equals(String.class) ) {
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writer.print("GetStringNativeChars(env, " + param.getSimpleName() + ")");
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} else if ( array_annotation == null )
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throw new RuntimeException("Illegal type " + java_type);
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}
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writer.println(";");
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}
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if ( array_annotation != null ) {
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final String n = getPointerArrayName(java_type);
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final String arrayType;
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if ( POINTER_LIST_NAME.equals(n) ) {
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if ( n.equals(param.getSimpleName().toString()) )
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throw new RuntimeException("The name '" + n + "' is not valid for object array arguments annotated with PointerArray");
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arrayType = translator.getSignature(true) + (org.lwjgl.PointerWrapper.class.isAssignableFrom(java_type.getComponentType()) ? " " : "");
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// Declare loop counters and allocate object array
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if ( !ptrLoopDeclared ) {
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writer.println("\tint " + n + "_i;");
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writer.println("\tjobject " + n + "_object;");
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ptrLoopDeclared = true;
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}
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} else {
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if ( n.equals(param.getSimpleName().toString()) )
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throw new RuntimeException("The name '" + n + "' is not valid for arguments annotated with PointerArray");
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arrayType = translator.getSignature(true);
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// Declare loop counters and allocate string array
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if ( !strLoopDeclared ) {
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writer.println("\tint " + n + "_i;");
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writer.println("\t" + arrayType + n + "_address;");
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strLoopDeclared = true;
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}
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}
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writer.print("\t" + arrayType + "*" + param.getSimpleName() + n + " = ");
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if ( check_annotation != null && check_annotation.canBeNull() )
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writer.print(array_annotation.value() + " == 0 ? NULL : ");
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writer.println("(" + arrayType + "*) malloc(" + array_annotation.value() + " * sizeof(" + arrayType + "));");
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}
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}
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private static String getPointerArrayName(final Class java_type) {
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final Class<?> component_type = java_type.getComponentType();
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if ( component_type != null && (Buffer.class.isAssignableFrom(component_type) || org.lwjgl.PointerWrapper.class.isAssignableFrom(component_type)) )
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return POINTER_LIST_NAME;
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else
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return STRING_LIST_NAME;
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}
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private static boolean hasPointerArrayInits(List<? extends VariableElement> params) {
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for ( VariableElement param : params ) {
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PointerArray pointerArray_annotation = param.getAnnotation(PointerArray.class);
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if ( pointerArray_annotation != null )
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return true;
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}
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return false;
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}
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private static void generatePointerArrayInits(TypeMap type_map, PrintWriter writer, List<? extends VariableElement> params) {
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for ( VariableElement param : params ) {
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PointerArray pointerArray_annotation = param.getAnnotation(PointerArray.class);
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if ( pointerArray_annotation != null ) {
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final Class java_type = Utils.getJavaType(param.asType());
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final Class<?> component_type = java_type.isArray() ? java_type.getComponentType() : null;
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final NativeTypeTranslator translator = new NativeTypeTranslator(type_map, param);
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param.asType().accept(translator, null);
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final String n = getPointerArrayName(java_type);
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if ( POINTER_LIST_NAME.equals(n) ) {
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// Init vars
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writer.println("\t" + n + "_i = 0;");
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// Fill pointer array with the buffer pointers
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writer.println("\twhile ( " + n + "_i < " + pointerArray_annotation.value() + " ) {");
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writer.println("\t\t" + n + "_object = (*env)->GetObjectArrayElement(env, " + param.getSimpleName() + ", " + n + "_i);");
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writer.print("\t\t" + param.getSimpleName() + n + "[" + n + "_i++] = (" + translator.getSignature(true) + ")");
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if ( Buffer.class.isAssignableFrom(component_type) )
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writer.println("(*env)->GetDirectBufferAddress(env, " + n + "_object);");
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else
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writer.println("(intptr_t)getPointerWrapperAddress(env, " + n + "_object);");
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writer.println("\t}");
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} else {
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final String lengths = pointerArray_annotation.lengths();
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// Init vars
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writer.println("\t" + n + "_i = 0;");
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writer.println("\t" + n + "_address = (" + translator.getSignature(true) + ")" + param.getSimpleName() + BUFFER_ADDRESS_POSTFIX + ";");
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// Fill string array with the string pointers
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writer.println("\twhile ( " + n + "_i < " + pointerArray_annotation.value() + " ) {");
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if ( lengths.length() == 0 ) {
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writer.println("\t\t" + param.getSimpleName() + n + "[" + n + "_i++] = " + n + "_address;");
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writer.println("\t\t" + n + "_address += strlen((const char *)" + n + "_address) + 1;");
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} else {
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writer.println("\t\t" + param.getSimpleName() + n + "[" + n + "_i] = " + n + "_address;");
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writer.println("\t\t" + n + "_address += " + lengths + BUFFER_ADDRESS_POSTFIX + "[" + n + "_i++];");
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}
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writer.println("\t}");
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}
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}
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}
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}
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}
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