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Diffstat (limited to 'src/java/com/sun/gluegen/JavaEmitter.java')
| -rw-r--r-- | src/java/com/sun/gluegen/JavaEmitter.java | 1689 |
1 files changed, 1689 insertions, 0 deletions
diff --git a/src/java/com/sun/gluegen/JavaEmitter.java b/src/java/com/sun/gluegen/JavaEmitter.java new file mode 100644 index 0000000..f079906 --- /dev/null +++ b/src/java/com/sun/gluegen/JavaEmitter.java @@ -0,0 +1,1689 @@ +/* + * Copyright (c) 2003 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; + +import java.io.*; +import java.util.*; +import java.text.MessageFormat; + +import com.sun.gluegen.cgram.types.*; + +// PROBLEMS: +// - what if something returns 'const int *'? Could we +// return an IntBuffer that has read-only behavior? Or do we copy the array +// (but we don't know its size!). What do we do if it returns a non-const +// int*? Should the user be allowed to write back to the returned pointer? +// +// - Non-const array types must be properly released with JNI_COMMIT +// in order to see side effects if the array was copied. + + +public class JavaEmitter implements GlueEmitter { + private StructLayout layout; + private TypeDictionary typedefDictionary; + private TypeDictionary structDictionary; + private Map canonMap; + private JavaConfiguration cfg; + + /** + * Style of code emission. Can emit everything into one class + * (AllStatic), separate interface and implementing classes + * (InterfaceAndImpl), only the interface (InterfaceOnly), or only + * the implementation (ImplOnly). + */ + public static final int ALL_STATIC = 1; + public static final int INTERFACE_AND_IMPL = 2; + public static final int INTERFACE_ONLY = 3; + public static final int IMPL_ONLY = 4; + + /** + * Access control for emitted Java methods. + */ + public static final int ACC_PUBLIC = 1; + public static final int ACC_PROTECTED = 2; + public static final int ACC_PRIVATE = 3; + public static final int ACC_PACKAGE_PRIVATE = 4; + + private PrintWriter javaWriter; // Emits either interface or, in AllStatic mode, everything + private PrintWriter javaImplWriter; // Only used in non-AllStatic modes for impl class + private PrintWriter cWriter; + private MachineDescription machDesc32; + private MachineDescription machDesc64; + + public void readConfigurationFile(String filename) throws Exception { + cfg = createConfig(); + cfg.read(filename); + } + + public void setMachineDescription(MachineDescription md32, + MachineDescription md64) { + if ((md32 == null) && (md64 == null)) { + throw new RuntimeException("Must specify at least one MachineDescription"); + } + + machDesc32 = md32; + machDesc64 = md64; + } + + public void beginEmission(GlueEmitterControls controls) throws IOException + { + try + { + openWriters(); + } + catch (Exception e) + { + throw new RuntimeException( + "Unable to open files for writing", e); + } + + emitAllFileHeaders(); + + // Request emission of any structs requested + for (Iterator iter = cfg.forcedStructs().iterator(); iter.hasNext(); ) { + controls.forceStructEmission((String) iter.next()); + } + } + + public void endEmission() + { + emitAllFileFooters(); + + try + { + closeWriters(); + } + catch (Exception e) + { + throw new RuntimeException( + "Unable to close open files", e); + } + } + + public void beginDefines() throws Exception + { + if (cfg.allStatic() || cfg.emitInterface()) { + javaWriter().println(); + } + } + + public void emitDefine(String name, String value, String optionalComment) throws Exception + { + if (cfg.allStatic() || cfg.emitInterface()) { + // TODO: Some defines (e.g., GL_DOUBLE_EXT in gl.h) are defined in terms + // of other defines -- should we emit them as references to the original + // define (not even sure if the lexer supports this)? Right now they're + // emitted as the numeric value of the original definition. If we decide + // emit them as references we'll also have to emit them in the correct + // order. It's probably not an issue right now because the emitter + // currently only emits only numeric defines -- if it handled #define'd + // objects it would make a bigger difference. + + if (!cfg.shouldIgnore(name)) { + String type = null; + + // FIXME: need to handle when type specifier is in last char (e.g., + // "1.0d or 2759L", because parseXXX() methods don't allow the type + // specifier character in the string. + // + //char lastChar = value.charAt(value.length()-1); + + try { + // see if it's a long or int + int radix; + String parseValue; + // FIXME: are you allowed to specify hex/octal constants with + // negation, e.g. "-0xFF" or "-056"? If so, need to modify the + // following "if(..)" checks and parseValue computation + if (value.startsWith("0x") || value.startsWith("0X")) { + radix = 16; + parseValue = value.substring(2); + } + else if (value.startsWith("0") && value.length() > 1) { + // TODO: is "0" the prefix in C to indicate octal??? + radix = 8; + parseValue = value.substring(1); + } + else { + radix = 10; + parseValue = value; + } + //System.err.println("parsing " + value + " as long w/ radix " + radix); + long longVal = Long.parseLong(parseValue, radix); + type = "long"; + // if constant is small enough, store it as an int instead of a long + if (longVal > Integer.MIN_VALUE && longVal < Integer.MAX_VALUE) { + type = "int"; + } + + } catch (NumberFormatException e) { + try { + // see if it's a double or float + double dVal = Double.parseDouble(value); + type = "double"; + // if constant is small enough, store it as a float instead of a double + if (dVal > Float.MIN_VALUE && dVal < Float.MAX_VALUE) { + type = "float"; + } + + } catch (NumberFormatException e2) { + throw new RuntimeException( + "Cannot emit define \""+name+"\": value \""+value+ + "\" cannot be assigned to a int, long, float, or double", e2); + } + } + + if (type == null) { + throw new RuntimeException( + "Cannot emit define (2) \""+name+"\": value \""+value+ + "\" cannot be assigned to a int, long, float, or double"); + } + if (optionalComment != null && optionalComment.length() != 0) { + javaWriter().println(" /** " + optionalComment + " */"); + } + javaWriter().println(" public static final " + type + " " + name + " = " + value + ";"); + } + } + } + + public void endDefines() throws Exception + { + } + + public void beginFunctions(TypeDictionary typedefDictionary, + TypeDictionary structDictionary, + Map canonMap) throws Exception { + this.typedefDictionary = typedefDictionary; + this.structDictionary = structDictionary; + this.canonMap = canonMap; + if (cfg.allStatic() || cfg.emitInterface()) { + javaWriter().println(); + } + } + + public Iterator emitFunctions(List/*<FunctionSymbol>*/ originalCFunctions) + throws Exception { + // Sometimes headers will have the same function prototype twice, once + // with the argument names and once without. We'll remember the signatures + // we've already processed we don't generate duplicate bindings. + // + // Note: this code assumes that on the equals() method in FunctionSymbol + // only considers function name and argument types (i.e., it does not + // consider argument *names*) when comparing FunctionSymbols for equality + Set funcsToBindSet = new HashSet(100); + for (Iterator cIter = originalCFunctions.iterator(); cIter.hasNext(); ) { + FunctionSymbol cFunc = (FunctionSymbol) cIter.next(); + if (!funcsToBindSet.contains(cFunc)) { + funcsToBindSet.add(cFunc); + } + } + + ArrayList funcsToBind = new ArrayList(funcsToBindSet.size()); + funcsToBind.addAll(funcsToBindSet); + // sort functions to make them easier to find in native code + Collections.sort( + funcsToBind, + new Comparator() { + public int compare(Object o1, Object o2) { + return ((FunctionSymbol)o1).getName().compareTo( + ((FunctionSymbol)o2).getName()); + } + public boolean equals(Object obj) { + return obj.getClass() == this.getClass(); + } + }); + + // Bind all the C funcs to Java methods + ArrayList/*<FunctionEmitter>*/ methodBindingEmitters = new ArrayList(2*funcsToBind.size()); + for (Iterator iter = funcsToBind.iterator(); iter.hasNext(); ) { + FunctionSymbol cFunc = (FunctionSymbol) iter.next(); + // Check to see whether this function should be ignored + if (cfg.shouldIgnore(cFunc.getName())) { + continue; // don't generate bindings for this symbol + } + + List allBindings = generateMethodBindingEmitters(cFunc); + methodBindingEmitters.addAll(allBindings); + } + + // Emit all the methods + for (int i = 0; i < methodBindingEmitters.size(); ++i) { + FunctionEmitter emitter = (FunctionEmitter)methodBindingEmitters.get(i); + try { + emitter.emit(); + } catch (Exception e) { + throw new RuntimeException( + "Error while emitting binding for \"" + emitter.getName() + "\"", e); + } + emitter.getDefaultOutput().println(); // put newline after method body + } + + // Return the list of FunctionSymbols that we generated gluecode for + return funcsToBind.iterator(); + } + + /** + * Create the object that will read and store configuration information for + * this JavaEmitter. + */ + protected JavaConfiguration createConfig() { + return new JavaConfiguration(); + } + + /** + * Get the configuration information for this JavaEmitter. + */ + protected JavaConfiguration getConfig() { + return cfg; + } + + /** + * Generates the public emitters for this MethodBinding which will + * produce either simply signatures (for the interface class, if + * any) or function definitions with or without a body (depending on + * whether or not the implementing function can go directly to + * native code because it doesn't need any processing of the + * outgoing arguments). + */ + protected void generatePublicEmitters(MethodBinding binding, + List allEmitters, + boolean signatureOnly) { + PrintWriter writer = ((signatureOnly || cfg.allStatic()) ? javaWriter() : javaImplWriter()); + + if (cfg.manuallyImplement(binding.getName()) && !signatureOnly) { + // We only generate signatures for manually-implemented methods; + // user provides the implementation + return; + } + + int accessControl = cfg.accessControl(binding.getName()); + // We should not emit anything except public APIs into interfaces + if (signatureOnly && (accessControl != ACC_PUBLIC)) { + return; + } + + // It's possible we may not need a body even if signatureOnly is + // set to false; for example, if the routine doesn't take any + // arrays or buffers as arguments + boolean isUnimplemented = cfg.isUnimplemented(binding.getName()); + List/*<String>*/ prologue = cfg.javaPrologueForMethod(binding, false, false); + List/*<String>*/ epilogue = cfg.javaEpilogueForMethod(binding, false, false); + boolean needsBody = (isUnimplemented || + (binding.needsNIOWrappingOrUnwrapping() || + binding.signatureUsesJavaPrimitiveArrays()) || + (prologue != null) || + (epilogue != null)); + + JavaMethodBindingEmitter emitter = + new JavaMethodBindingEmitter(binding, + writer, + cfg.runtimeExceptionType(), + !signatureOnly && needsBody, + false, + cfg.nioDirectOnly(binding.getName()), + false, + false, + false, + isUnimplemented); + switch (accessControl) { + case ACC_PUBLIC: emitter.addModifier(JavaMethodBindingEmitter.PUBLIC); break; + case ACC_PROTECTED: emitter.addModifier(JavaMethodBindingEmitter.PROTECTED); break; + case ACC_PRIVATE: emitter.addModifier(JavaMethodBindingEmitter.PRIVATE); break; + default: break; // package-private adds no modifiers + } + if (cfg.allStatic()) { + emitter.addModifier(JavaMethodBindingEmitter.STATIC); + } + if (!isUnimplemented && !needsBody && !signatureOnly) { + emitter.addModifier(JavaMethodBindingEmitter.NATIVE); + } + emitter.setReturnedArrayLengthExpression(cfg.returnedArrayLength(binding.getName())); + emitter.setPrologue(prologue); + emitter.setEpilogue(epilogue); + emitter.setRangeCheckExpressions(cfg.rangeCheckExpressions(binding.getName())); + emitter.setByteRangeCheckExpressions(cfg.byteRangeCheckExpressions(binding.getName())); + allEmitters.add(emitter); + } + + /** + * Generates the private emitters for this MethodBinding. On the + * Java side these will simply produce signatures for native + * methods. On the C side these will create the emitters which will + * write the JNI code to interface to the functions. We need to be + * careful to make the signatures all match up and not produce too + * many emitters which would lead to compilation errors from + * creating duplicated methods / functions. + */ + protected void generatePrivateEmitters(MethodBinding binding, + List allEmitters) { + if (cfg.manuallyImplement(binding.getName())) { + // Don't produce emitters for the implementation class + return; + } + + boolean hasPrologueOrEpilogue = + ((cfg.javaPrologueForMethod(binding, false, false) != null) || + (cfg.javaEpilogueForMethod(binding, false, false) != null)); + + // If we already generated a public native entry point for this + // method, don't emit another one + if (!cfg.isUnimplemented(binding.getName()) && + (binding.needsNIOWrappingOrUnwrapping() || + binding.signatureUsesJavaPrimitiveArrays() || + hasPrologueOrEpilogue)) { + PrintWriter writer = (cfg.allStatic() ? javaWriter() : javaImplWriter()); + + // If the binding uses primitive arrays, we are going to emit + // the private native entry point for it along with the version + // taking only NIO buffers + if (!binding.signatureUsesJavaPrimitiveArrays()) { + // (Always) emit the entry point taking only direct buffers + JavaMethodBindingEmitter emitter = + new JavaMethodBindingEmitter(binding, + writer, + cfg.runtimeExceptionType(), + false, + true, + cfg.nioDirectOnly(binding.getName()), + true, + true, + false, + false); + emitter.addModifier(JavaMethodBindingEmitter.PRIVATE); + if (cfg.allStatic()) { + emitter.addModifier(JavaMethodBindingEmitter.STATIC); + } + emitter.addModifier(JavaMethodBindingEmitter.NATIVE); + emitter.setReturnedArrayLengthExpression(cfg.returnedArrayLength(binding.getName())); + emitter.setRangeCheckExpressions(cfg.rangeCheckExpressions(binding.getName())); + emitter.setByteRangeCheckExpressions(cfg.byteRangeCheckExpressions(binding.getName())); + allEmitters.add(emitter); + + // Optionally emit the entry point taking arrays which handles + // both the public entry point taking arrays as well as the + // indirect buffer case + if (!cfg.nioDirectOnly(binding.getName()) && + binding.signatureCanUseIndirectNIO()) { + emitter = + new JavaMethodBindingEmitter(binding, + writer, + cfg.runtimeExceptionType(), + false, + true, + false, + true, + false, + true, + false); + + emitter.addModifier(JavaMethodBindingEmitter.PRIVATE); + if (cfg.allStatic()) { + emitter.addModifier(JavaMethodBindingEmitter.STATIC); + } + emitter.addModifier(JavaMethodBindingEmitter.NATIVE); + emitter.setReturnedArrayLengthExpression(cfg.returnedArrayLength(binding.getName())); + emitter.setRangeCheckExpressions(cfg.rangeCheckExpressions(binding.getName())); + emitter.setByteRangeCheckExpressions(cfg.byteRangeCheckExpressions(binding.getName())); + allEmitters.add(emitter); + } + } + } + + // Now generate the C emitter(s). We need to produce one for every + // Java native entry point (public or private). The only + // situations where we don't produce one are (a) when the method + // is unimplemented, and (b) when the signature contains primitive + // arrays, since the latter is handled by the method binding + // variant taking only NIO Buffers. + if (!cfg.isUnimplemented(binding.getName()) && + !binding.signatureUsesJavaPrimitiveArrays()) { + // See whether we need an expression to help calculate the + // length of any return type + MessageFormat returnValueCapacityFormat = null; + MessageFormat returnValueLengthFormat = null; + JavaType javaReturnType = binding.getJavaReturnType(); + if (javaReturnType.isNIOBuffer() || + javaReturnType.isCompoundTypeWrapper()) { + // See whether capacity has been specified + String capacity = cfg.returnValueCapacity(binding.getName()); + if (capacity != null) { + returnValueCapacityFormat = new MessageFormat(capacity); + } + } else if (javaReturnType.isArray() || + javaReturnType.isArrayOfCompoundTypeWrappers()) { + // NOTE: adding a check here because the CMethodBindingEmitter + // also doesn't yet handle returning scalar arrays. In order + // to implement this, return the type as a Buffer instead + // (i.e., IntBuffer, FloatBuffer) and add code as necessary. + if (javaReturnType.isPrimitiveArray()) { + throw new RuntimeException("Primitive array return types not yet supported"); + } + + // See whether length has been specified + String len = cfg.returnValueLength(binding.getName()); + if (len != null) { + returnValueLengthFormat = new MessageFormat(len); + } + } + + CMethodBindingEmitter cEmitter = + new CMethodBindingEmitter(binding, + cWriter(), + cfg.implPackageName(), + cfg.implClassName(), + true, /* NOTE: we always disambiguate with a suffix now, so this is optional */ + cfg.allStatic(), + (binding.needsNIOWrappingOrUnwrapping() || hasPrologueOrEpilogue), + false); + if (returnValueCapacityFormat != null) { + cEmitter.setReturnValueCapacityExpression(returnValueCapacityFormat); + } + if (returnValueLengthFormat != null) { + cEmitter.setReturnValueLengthExpression(returnValueLengthFormat); + } + cEmitter.setTemporaryCVariableDeclarations(cfg.temporaryCVariableDeclarations(binding.getName())); + cEmitter.setTemporaryCVariableAssignments(cfg.temporaryCVariableAssignments(binding.getName())); + allEmitters.add(cEmitter); + + // Now see if we have to emit another entry point to handle the + // indirect buffer and array case + if (binding.argumentsUseNIO() && + binding.signatureCanUseIndirectNIO() && + !cfg.nioDirectOnly(binding.getName())) { + cEmitter = + new CMethodBindingEmitter(binding, + cWriter(), + cfg.implPackageName(), + cfg.implClassName(), + true, /* NOTE: we always disambiguate with a suffix now, so this is optional */ + cfg.allStatic(), + binding.needsNIOWrappingOrUnwrapping(), + true); + if (returnValueCapacityFormat != null) { + cEmitter.setReturnValueCapacityExpression(returnValueCapacityFormat); + } + if (returnValueLengthFormat != null) { + cEmitter.setReturnValueLengthExpression(returnValueLengthFormat); + } + cEmitter.setTemporaryCVariableDeclarations(cfg.temporaryCVariableDeclarations(binding.getName())); + cEmitter.setTemporaryCVariableAssignments(cfg.temporaryCVariableAssignments(binding.getName())); + allEmitters.add(cEmitter); + } + } + } + + /** + * Generate all appropriate Java bindings for the specified C function + * symbols. + */ + protected List generateMethodBindingEmitters(FunctionSymbol sym) throws Exception { + + ArrayList/*<FunctionEmitter>*/ allEmitters = new ArrayList(); + + try { + // Get Java binding for the function + MethodBinding mb = bindFunction(sym, null, null, machDesc64); + + // JavaTypes representing C pointers in the initial + // MethodBinding have not been lowered yet to concrete types + List bindings = expandMethodBinding(mb); + + for (Iterator iter = bindings.iterator(); iter.hasNext(); ) { + MethodBinding binding = (MethodBinding) iter.next(); + + if (cfg.allStatic() && binding.hasContainingType()) { + // This should not currently happen since structs are emitted using a different mechanism + throw new IllegalArgumentException("Cannot create binding in AllStatic mode because method has containing type: \"" + + binding + "\""); + } + + // The structure of the generated glue code looks something like this: + // Simple method (no arrays, void pointers, etc.): + // Interface class: + // public void fooMethod(); + // Implementation class: + // public native void fooMethod(); + // + // Method taking void* argument: + // Interface class: + // public void fooMethod(Buffer arg); + // Implementation class: + // public void fooMethod(Buffer arg) { + // ... bounds checks, etc. ... + // if (arg.isDirect()) { + // fooMethod0(arg, computeDirectBufferByteOffset(arg)); + // } else { + // fooMethod1(getIndirectBufferArray(arg), computeIndirectBufferByteOffset(arg)); + // } + // } + // private native void fooMethod0(Object arg, int arg_byte_offset); + // private native void fooMethod1(Object arg, int arg_byte_offset); + // + // Method taking primitive array argument: + // Interface class: + // public void fooMethod(int[] arg, int arg_offset); + // public void fooMethod(IntBuffer arg); + // Implementing class: + // public void fooMethod(int[] arg, int arg_offset) { + // ... range checks, etc. ... + // fooMethod1(arg, SIZEOF_INT * arg_offset); + // } + // public void fooMethod(IntBuffer arg) { + // ... bounds checks, etc. ... + // if (arg.isDirect()) { + // fooMethod0(arg, computeDirectBufferByteOffset(arg)); + // } else { + // fooMethod1(getIndirectBufferArray(arg), computeIndirectBufferByteOffset(arg)); + // } + // } + // private native void fooMethod0(Object arg, int arg_byte_offset); + // private native void fooMethod1(Object arg, int arg_byte_offset); + // + // Note in particular that the public entry point taking an + // array is merely a special case of the indirect buffer case. + + if (cfg.emitInterface()) { + generatePublicEmitters(binding, allEmitters, true); + } + if (cfg.emitImpl()) { + generatePublicEmitters(binding, allEmitters, false); + generatePrivateEmitters(binding, allEmitters); + } + } // end iteration over expanded bindings + } catch (Exception e) { + throw new RuntimeException( + "Error while generating bindings for \"" + sym + "\"", e); + } + + return allEmitters; + } + + + public void endFunctions() throws Exception + { + if (cfg.allStatic() || cfg.emitInterface()) { + emitCustomJavaCode(javaWriter(), cfg.className()); + } + if (!cfg.allStatic() && cfg.emitImpl()) { + emitCustomJavaCode(javaImplWriter(), cfg.implClassName()); + } + } + + public void beginStructLayout() throws Exception {} + public void layoutStruct(CompoundType t) throws Exception { + getLayout().layout(t); + } + public void endStructLayout() throws Exception {} + + public void beginStructs(TypeDictionary typedefDictionary, + TypeDictionary structDictionary, + Map canonMap) throws Exception { + this.typedefDictionary = typedefDictionary; + this.structDictionary = structDictionary; + this.canonMap = canonMap; + } + + public void emitStruct(CompoundType structType, String alternateName) throws Exception { + // Emit abstract base class delegating to 32-bit or 64-bit implementations + emitStructImpl(structType, alternateName, machDesc32, machDesc64, true, false); + // Emit concrete implementing class for each variant + emitStructImpl(structType, alternateName, machDesc32, machDesc64, false, true); + emitStructImpl(structType, alternateName, machDesc32, machDesc64, false, false); + } + + public void emitStructImpl(CompoundType structType, + String alternateName, + MachineDescription md32, + MachineDescription md64, + boolean doBaseClass, + boolean do32Bit) throws Exception { + String name = structType.getName(); + if (name == null && alternateName != null) { + name = alternateName; + } + + if (name == null) { + System.err.println("WARNING: skipping emission of unnamed struct \"" + structType + "\""); + return; + } + + if (cfg.shouldIgnore(name)) { + return; + } + + Type containingCType = canonicalize(new PointerType(SizeThunk.POINTER, structType, 0)); + JavaType containingType = typeToJavaType(containingCType, false, null); + if (!containingType.isCompoundTypeWrapper()) { + return; + } + String containingTypeName = containingType.getName(); + + if ((md32 == null) || (md64 == null)) { + throw new RuntimeException("Must supply both 32- and 64-bit MachineDescriptions to emitStructImpl"); + } + String suffix = ""; + + // The "external" MachineDescription is the one used to determine + // the sizes of the primitive types seen in the public API. For + // example, if a C long is an element of a struct, it is the size + // of a Java int on a 32-bit machine but the size of a Java long + // on a 64-bit machine. To support both of these sizes with the + // same API, the abstract base class must take and return a Java + // long from the setter and getter for this field. However the + // implementation on a 32-bit platform must downcast this to an + // int and set only an int's worth of data in the struct. The + // "internal" MachineDescription is the one used to determine how + // much data to set in or get from the struct and exactly from + // where it comes. + // + // Note that the 64-bit MachineDescription is always used as the + // external MachineDescription. + + MachineDescription extMachDesc = md64; + MachineDescription intMachDesc = null; + + if (!doBaseClass) { + if (do32Bit) { + intMachDesc = md32; + suffix = "32"; + } else { + intMachDesc = md64; + suffix = "64"; + } + } + + boolean needsNativeCode = false; + // Native code for calls through function pointers gets emitted + // into the abstract base class; Java code which accesses fields + // gets emitted into the concrete classes + if (doBaseClass) { + for (int i = 0; i < structType.getNumFields(); i++) { + if (structType.getField(i).getType().isFunctionPointer()) { + needsNativeCode = true; + break; + } + } + } + + String structClassPkg = cfg.packageForStruct(name); + PrintWriter writer = null; + PrintWriter cWriter = null; + try + { + writer = openFile( + cfg.javaOutputDir() + File.separator + + CodeGenUtils.packageAsPath(structClassPkg) + + File.separator + containingTypeName + suffix + ".java"); + CodeGenUtils.emitAutogeneratedWarning(writer, this); + if (needsNativeCode) { + String nRoot = cfg.nativeOutputDir(); + if (cfg.nativeOutputUsesJavaHierarchy()) { + nRoot += + File.separator + + CodeGenUtils.packageAsPath(cfg.packageName()); + } + cWriter = openFile(nRoot + File.separator + containingTypeName + "_JNI.c"); + CodeGenUtils.emitAutogeneratedWarning(cWriter, this); + emitCHeader(cWriter, containingTypeName); + } + } + catch(Exception e) + { + throw new RuntimeException( + "Unable to open files for emission of struct class", e); + } + + writer.println(); + writer.println("package " + structClassPkg + ";"); + writer.println(); + writer.println("import java.nio.*;"); + writer.println(); + writer.println("import com.sun.gluegen.runtime.*;"); + writer.println(); + List/*<String>*/ imports = cfg.imports(); + for (Iterator iter = imports.iterator(); iter.hasNext(); ) { + writer.print("import "); + writer.print(iter.next()); + writer.println(";"); + } + List/*<String>*/ javadoc = cfg.javadocForClass(containingTypeName); + for (Iterator iter = javadoc.iterator(); iter.hasNext(); ) { + writer.println((String) iter.next()); + } + writer.println(); + writer.print((doBaseClass ? "public " : "") + (doBaseClass ? "abstract " : "") + "class " + containingTypeName + suffix + " "); + if (!doBaseClass) { + writer.print("extends " + containingTypeName + " "); + } + boolean firstIteration = true; + List/*<String>*/ userSpecifiedInterfaces = cfg.implementedInterfaces(containingTypeName); + for (Iterator iter = userSpecifiedInterfaces.iterator(); iter.hasNext(); ) { + if (firstIteration) { + writer.print("implements "); + } + firstIteration = false; + writer.print(iter.next()); + writer.print(" "); + } + writer.println("{"); + if (doBaseClass) { + writer.println(" StructAccessor accessor;"); + writer.println(); + } + writer.println(" public static int size() {"); + if (doBaseClass) { + writer.println(" if (CPU.is32Bit()) {"); + writer.println(" return " + containingTypeName + "32" + ".size();"); + writer.println(" } else {"); + writer.println(" return " + containingTypeName + "64" + ".size();"); + writer.println(" }"); + } else { + writer.println(" return " + structType.getSize(intMachDesc) + ";"); + } + writer.println(" }"); + writer.println(); + if (doBaseClass) { + writer.println(" public static " + containingTypeName + " create() {"); + writer.println(" return create(BufferFactory.newDirectByteBuffer(size()));"); + writer.println(" }"); + writer.println(); + writer.println(" public static " + containingTypeName + " create(ByteBuffer buf) {"); + writer.println(" if (CPU.is32Bit()) {"); + writer.println(" return new " + containingTypeName + "32(buf);"); + writer.println(" } else {"); + writer.println(" return new " + containingTypeName + "64(buf);"); + writer.println(" }"); + writer.println(" }"); + writer.println(); + writer.println(" " + containingTypeName + "(ByteBuffer buf) {"); + writer.println(" accessor = new StructAccessor(buf);"); + writer.println(" }"); + writer.println(); + writer.println(" public ByteBuffer getBuffer() {"); + writer.println(" return accessor.getBuffer();"); + writer.println(" }"); + } else { + writer.println(" " + containingTypeName + suffix + "(ByteBuffer buf) {"); + writer.println(" super(buf);"); + writer.println(" }"); + writer.println(); + } + for (int i = 0; i < structType.getNumFields(); i++) { + Field field = structType.getField(i); + Type fieldType = field.getType(); + if (!cfg.shouldIgnore(name + " " + field.getName())) { + if (fieldType.isFunctionPointer()) { + if (doBaseClass) { + try { + // Emit method call and associated native code + FunctionType funcType = fieldType.asPointer().getTargetType().asFunction(); + FunctionSymbol funcSym = new FunctionSymbol(field.getName(), funcType); + MethodBinding binding = bindFunction(funcSym, containingType, containingCType, machDesc64); + binding.findThisPointer(); // FIXME: need to provide option to disable this on per-function basis + writer.println(); + + // Emit public Java entry point for calling this function pointer + JavaMethodBindingEmitter emitter = + new JavaMethodBindingEmitter(binding, + writer, + cfg.runtimeExceptionType(), + true, + false, + true, // FIXME: should unify this with the general emission code + false, + false, // FIXME: should unify this with the general emission code + false, // FIXME: should unify this with the general emission code + false); + emitter.addModifier(JavaMethodBindingEmitter.PUBLIC); + emitter.emit(); + + // Emit private native Java entry point for calling this function pointer + emitter = + new JavaMethodBindingEmitter(binding, + writer, + cfg.runtimeExceptionType(), + false, + true, + true, // FIXME: should unify this with the general emission code + true, + true, // FIXME: should unify this with the general emission code + false, // FIXME: should unify this with the general emission code + false); + emitter.addModifier(JavaMethodBindingEmitter.PRIVATE); + emitter.addModifier(JavaMethodBindingEmitter.NATIVE); + emitter.emit(); + + // Emit (private) C entry point for calling this function pointer + CMethodBindingEmitter cEmitter = + new CMethodBindingEmitter(binding, + cWriter, + structClassPkg, + containingTypeName, + true, // FIXME: this is optional at this point + false, + true, + false); // FIXME: should unify this with the general emission code + cEmitter.emit(); + } catch (Exception e) { + System.err.println("While processing field " + field + " of type " + name + ":"); + throw(e); + } + } + } else if (fieldType.isCompound()) { + // FIXME: will need to support this at least in order to + // handle the union in jawt_Win32DrawingSurfaceInfo (fabricate + // a name?) + if (fieldType.getName() == null) { + throw new RuntimeException("Anonymous structs as fields not supported yet (field \"" + + field + "\" in type \"" + name + "\")"); + } + + writer.println(); + writer.print(" public " + (doBaseClass ? "abstract " : "") + fieldType.getName() + " " + field.getName() + "()"); + if (doBaseClass) { + writer.println(";"); + } else { + writer.println(" {"); + writer.println(" return " + fieldType.getName() + ".create(accessor.slice(" + + field.getOffset(intMachDesc) + ", " + fieldType.getSize(intMachDesc) + "));"); + writer.println(" }"); + } + // FIXME: add setter by autogenerating "copyTo" for all compound type wrappers + } else if (fieldType.isArray()) { + if (!doBaseClass) { + System.err.println("WARNING: Array fields (field \"" + field + "\" of type \"" + name + + "\") not implemented yet"); + } + } else { + JavaType internalJavaType = null; + JavaType externalJavaType = null; + + try { + externalJavaType = typeToJavaType(fieldType, false, extMachDesc); + if (!doBaseClass) { + internalJavaType = typeToJavaType(fieldType, false, intMachDesc); + } + } catch (Exception e) { + System.err.println("Error occurred while creating accessor for field \"" + + field.getName() + "\" in type \"" + name + "\""); + e.printStackTrace(); + throw(e); + } + if (externalJavaType.isPrimitive()) { + // Primitive type + String externalJavaTypeName = null; + String internalJavaTypeName = null; + externalJavaTypeName = externalJavaType.getName(); + if (!doBaseClass) { + internalJavaTypeName = internalJavaType.getName(); + } + if (isOpaque(fieldType)) { + externalJavaTypeName = compatiblePrimitiveJavaTypeName(fieldType, externalJavaType, extMachDesc); + if (!doBaseClass) { + internalJavaTypeName = compatiblePrimitiveJavaTypeName(fieldType, internalJavaType, intMachDesc); + } + } + String capitalized = null; + if (!doBaseClass) { + capitalized = + "" + Character.toUpperCase(internalJavaTypeName.charAt(0)) + internalJavaTypeName.substring(1); + } + int slot = -1; + if (!doBaseClass) { + slot = slot(fieldType, (int) field.getOffset(intMachDesc), intMachDesc); + } + // Setter + writer.println(); + writer.print(" public " + (doBaseClass ? "abstract " : "") + containingTypeName + " " + field.getName() + "(" + externalJavaTypeName + " val)"); + if (doBaseClass) { + writer.println(";"); + } else { + writer.println(" {"); + writer.print (" accessor.set" + capitalized + "At(" + slot + ", "); + if (!externalJavaTypeName.equals(internalJavaTypeName)) { + writer.print("(" + internalJavaTypeName + ") "); + } + writer.println("val);"); + writer.println(" return this;"); + writer.println(" }"); + } + writer.println(); + // Getter + writer.print(" public " + (doBaseClass ? "abstract " : "") + externalJavaTypeName + " " + field.getName() + "()"); + if (doBaseClass) { + writer.println(";"); + } else { + writer.println(" {"); + writer.print (" return "); + if (!externalJavaTypeName.equals(internalJavaTypeName)) { + writer.print("(" + externalJavaTypeName + ") "); + } + writer.println("accessor.get" + capitalized + "At(" + slot + ");"); + writer.println(" }"); + } + } else { + // FIXME + System.err.println("WARNING: Complicated fields (field \"" + field + "\" of type \"" + name + + "\") not implemented yet"); + // throw new RuntimeException("Complicated fields (field \"" + field + "\" of type \"" + t + + // "\") not implemented yet"); + } + } + } + } + if (doBaseClass) { + emitCustomJavaCode(writer, containingTypeName); + } + writer.println("}"); + writer.flush(); + writer.close(); + if (needsNativeCode) { + cWriter.flush(); + cWriter.close(); + } + } + public void endStructs() throws Exception {} + + //---------------------------------------------------------------------- + // Internals only below this point + // + + private JavaType typeToJavaType(Type cType, boolean outgoingArgument, MachineDescription curMachDesc) { + // Recognize JNIEnv* case up front + PointerType opt = cType.asPointer(); + if ((opt != null) && + (opt.getTargetType().getName() != null) && + (opt.getTargetType().getName().equals("JNIEnv"))) { + return JavaType.createForJNIEnv(); + } + + // Opaque specifications override automatic conversions + TypeInfo info = cfg.typeInfo(cType, typedefDictionary); + if (info != null) { + return info.javaType(); + } + Type t = cType; + if (t.isInt() || t.isEnum()) { + switch ((int) t.getSize(curMachDesc)) { + case 1: return javaType(Byte.TYPE); + case 2: return javaType(Short.TYPE); + case 4: return javaType(Integer.TYPE); + case 8: return javaType(Long.TYPE); + default: throw new RuntimeException("Unknown integer type of size " + + t.getSize(curMachDesc) + " and name " + t.getName()); + } + } else if (t.isFloat()) { + return javaType(Float.TYPE); + } else if (t.isDouble()) { + return javaType(Double.TYPE); + } else if (t.isVoid()) { + return javaType(Void.TYPE); + } else { + if (t.pointerDepth() > 0 || t.arrayDimension() > 0) { + Type targetType; // target type + if (t.isPointer()) { + // t is <type>*, we need to get <type> + targetType = t.asPointer().getTargetType(); + } else { + // t is <type>[], we need to get <type> + targetType = t.asArray().getElementType(); + } + + // Handle Types of form pointer-to-type or array-of-type, like + // char* or int[]; these are expanded out into Java primitive + // arrays, NIO buffers, or both in expandMethodBinding + if (t.pointerDepth() == 1 || t.arrayDimension() == 1) { + if (targetType.isVoid()) { + return JavaType.createForVoidPointer(); + } else if (targetType.isInt()) { + switch ((int) targetType.getSize(curMachDesc)) { + case 1: return JavaType.createForCCharPointer(); + case 2: return JavaType.createForCShortPointer(); + case 4: return JavaType.createForCInt32Pointer(); + case 8: return JavaType.createForCInt64Pointer(); + default: throw new RuntimeException("Unknown integer array type of size " + + t.getSize(curMachDesc) + " and name " + t.getName()); + } + } else if (targetType.isFloat()) { + return JavaType.createForCFloatPointer(); + } else if (targetType.isDouble()) { + return JavaType.createForCDoublePointer(); + } else if (targetType.isCompound()) { + if (t.isArray()) { + throw new RuntimeException("Arrays of compound types not handled yet"); + } + // Special cases for known JNI types (in particular for converting jawt.h) + if (t.getName() != null && + t.getName().equals("jobject")) { + return javaType(java.lang.Object.class); + } + + String name = targetType.getName(); + if (name == null) { + // Try containing pointer type for any typedefs + name = t.getName(); + if (name == null) { + throw new RuntimeException("Couldn't find a proper type name for pointer type " + t); + } + } + + return JavaType.createForCStruct(cfg.renameJavaType(name)); + } else { + throw new RuntimeException("Don't know how to convert pointer/array type \"" + + t + "\""); + } + } + // Handle Types of form pointer-to-pointer-to-type or + // array-of-arrays-of-type, like char** or int[][] + else if (t.pointerDepth() == 2 || t.arrayDimension() == 2) { + // Get the target type of the target type (targetType was computer earlier + // as to be a pointer to the target type, so now we need to get its + // target type) + Type bottomType; + if (targetType.isPointer()) { + // t is<type>**, targetType is <type>*, we need to get <type> + bottomType = targetType.asPointer().getTargetType(); + } else { + // t is<type>[][], targetType is <type>[], we need to get <type> + bottomType = targetType.asArray().getElementType(); + } + + if (bottomType.isPrimitive()) { + if (bottomType.isInt()) { + switch ((int) bottomType.getSize(curMachDesc)) { + case 1: return javaType(ArrayTypes.byteBufferArrayClass); + case 2: return javaType(ArrayTypes.shortBufferArrayClass); + case 4: return javaType(ArrayTypes.intBufferArrayClass); + case 8: return javaType(ArrayTypes.longBufferArrayClass); + default: throw new RuntimeException("Unknown two-dimensional integer array type of element size " + + bottomType.getSize(curMachDesc) + " and name " + bottomType.getName()); + } + } else if (bottomType.isFloat()) { + return javaType(ArrayTypes.floatBufferArrayClass); + } else if (bottomType.isDouble()) { + return javaType(ArrayTypes.doubleBufferArrayClass); + } else { + throw new RuntimeException("Unexpected primitive type " + bottomType.getName() + + " in two-dimensional array"); + } + } else if (bottomType.isVoid()) { + return javaType(ArrayTypes.bufferArrayClass); + } else if (targetType.isPointer() && (targetType.pointerDepth() == 1) && + targetType.asPointer().getTargetType().isCompound()) { + // Array of pointers; convert as array of StructAccessors + return JavaType.createForCArray(targetType); + } else { + throw new RuntimeException( + "Could not convert C type \"" + t + "\" " + + "to appropriate Java type; need to add more support for " + + "depth=2 pointer/array types [debug info: targetType=\"" + + targetType + "\"]"); + } + } else { + // can't handle this type of pointer/array argument + throw new RuntimeException( + "Could not convert C pointer/array \"" + t + "\" to " + + "appropriate Java type; types with pointer/array depth " + + "greater than 2 are not yet supported [debug info: " + + "pointerDepth=" + t.pointerDepth() + " arrayDimension=" + + t.arrayDimension() + " targetType=\"" + targetType + "\"]"); + } + + } else { + throw new RuntimeException( + "Could not convert C type \"" + t + "\" (class " + + t.getClass().getName() + ") to appropriate Java type"); + } + } + } + + private static boolean isIntegerType(Class c) { + return ((c == Byte.TYPE) || + (c == Short.TYPE) || + (c == Character.TYPE) || + (c == Integer.TYPE) || + (c == Long.TYPE)); + } + + private int slot(Type t, int byteOffset, MachineDescription curMachDesc) { + if (t.isInt()) { + switch ((int) t.getSize(curMachDesc)) { + case 1: + case 2: + case 4: + case 8: return byteOffset / (int) t.getSize(curMachDesc); + default: throw new RuntimeException("Illegal type"); + } + } else if (t.isFloat()) { + return byteOffset / 4; + } else if (t.isDouble()) { + return byteOffset / 8; + } else if (t.isPointer()) { + return byteOffset / curMachDesc.pointerSizeInBytes(); + } else { + throw new RuntimeException("Illegal type " + t); + } + } + + private StructLayout getLayout() { + if (layout == null) { + layout = StructLayout.createForCurrentPlatform(); + } + return layout; + } + + protected PrintWriter openFile(String filename) throws IOException { + //System.out.println("Trying to open: " + filename); + File file = new File(filename); + String parentDir = file.getParent(); + if (parentDir != null) + { + File pDirFile = new File(parentDir); + pDirFile.mkdirs(); + } + return new PrintWriter(new BufferedWriter(new FileWriter(file))); + } + + private boolean isOpaque(Type type) { + return (cfg.typeInfo(type, typedefDictionary) != null); + } + + private String compatiblePrimitiveJavaTypeName(Type fieldType, + JavaType javaType, + MachineDescription curMachDesc) { + Class c = javaType.getJavaClass(); + if (!isIntegerType(c)) { + // FIXME + throw new RuntimeException("Can't yet handle opaque definitions of structs' fields to non-integer types (byte, short, int, long, etc.)"); + } + switch ((int) fieldType.getSize(curMachDesc)) { + case 1: return "byte"; + case 2: return "short"; + case 4: return "int"; + case 8: return "long"; + default: throw new RuntimeException("Can't handle opaque definitions if the starting type isn't compatible with integral types"); + } + } + + private void openWriters() throws IOException { + String jRoot = null; + if (cfg.allStatic() || cfg.emitInterface()) { + jRoot = cfg.javaOutputDir() + File.separator + + CodeGenUtils.packageAsPath(cfg.packageName()); + } + String jImplRoot = null; + if (!cfg.allStatic()) { + jImplRoot = + cfg.javaOutputDir() + File.separator + + CodeGenUtils.packageAsPath(cfg.implPackageName()); + } + String nRoot = cfg.nativeOutputDir(); + if (cfg.nativeOutputUsesJavaHierarchy()) + { + nRoot += + File.separator + CodeGenUtils.packageAsPath(cfg.packageName()); + } + + if (cfg.allStatic() || cfg.emitInterface()) { + javaWriter = openFile(jRoot + File.separator + cfg.className() + ".java"); + } + if (!cfg.allStatic() && cfg.emitImpl()) { + javaImplWriter = openFile(jImplRoot + File.separator + cfg.implClassName() + ".java"); + } + if (cfg.emitImpl()) { + cWriter = openFile(nRoot + File.separator + cfg.implClassName() + "_JNI.c"); + } + + if (javaWriter != null) { + CodeGenUtils.emitAutogeneratedWarning(javaWriter, this); + } + if (javaImplWriter != null) { + CodeGenUtils.emitAutogeneratedWarning(javaImplWriter, this); + } + if (cWriter != null) { + CodeGenUtils.emitAutogeneratedWarning(cWriter, this); + } + } + + protected PrintWriter javaWriter() { + if (!cfg.allStatic() && !cfg.emitInterface()) { + throw new InternalError("Should not call this"); + } + return javaWriter; + } + + protected PrintWriter javaImplWriter() { + if (cfg.allStatic() || !cfg.emitImpl()) { + throw new InternalError("Should not call this"); + } + return javaImplWriter; + } + + protected PrintWriter cWriter() { + if (!cfg.emitImpl()) { + throw new InternalError("Should not call this"); + } + return cWriter; + } + + private void closeWriter(PrintWriter writer) throws IOException { + writer.flush(); + writer.close(); + } + + private void closeWriters() throws IOException { + if (javaWriter != null) { + closeWriter(javaWriter); + } + if (javaImplWriter != null) { + closeWriter(javaImplWriter); + } + if (cWriter != null) { + closeWriter(cWriter); + } + javaWriter = null; + javaImplWriter = null; + cWriter = null; + } + + /** + * Returns the value that was specified by the configuration directive + * "JavaOutputDir", or the default if none was specified. + */ + protected String getJavaOutputDir() { + return cfg.javaOutputDir(); + } + + /** + * Returns the value that was specified by the configuration directive + * "Package", or the default if none was specified. + */ + protected String getJavaPackageName() { + return cfg.packageName(); + } + + /** + * Returns the value that was specified by the configuration directive + * "ImplPackage", or the default if none was specified. + */ + protected String getImplPackageName() { + return cfg.implPackageName(); + } + + /** + * Emit all the strings specified in the "CustomJavaCode" parameters of + * the configuration file. + */ + protected void emitCustomJavaCode(PrintWriter writer, String className) throws Exception + { + List code = cfg.customJavaCodeForClass(className); + if (code.size() == 0) + return; + + writer.println(); + writer.println(" // --- Begin CustomJavaCode .cfg declarations"); + for (Iterator iter = code.iterator(); iter.hasNext(); ) { + writer.println((String) iter.next()); + } + writer.println(" // ---- End CustomJavaCode .cfg declarations"); + } + + /** + * Write out any header information for the output files (class declaration + * and opening brace, import statements, etc). + */ + protected void emitAllFileHeaders() throws IOException { + try { + if (cfg.allStatic() || cfg.emitInterface()) { + String[] interfaces; + List userSpecifiedInterfaces = null; + if (cfg.emitInterface()) { + userSpecifiedInterfaces = cfg.extendedInterfaces(cfg.className()); + } else { + userSpecifiedInterfaces = cfg.implementedInterfaces(cfg.className()); + } + interfaces = new String[userSpecifiedInterfaces.size()]; + userSpecifiedInterfaces.toArray(interfaces); + + final List/*<String>*/ intfDocs = cfg.javadocForClass(cfg.className()); + CodeGenUtils.EmissionCallback docEmitter = + new CodeGenUtils.EmissionCallback() { + public void emit(PrintWriter w) { + for (Iterator iter = intfDocs.iterator(); iter.hasNext(); ) { + w.println((String) iter.next()); + } + } + }; + + CodeGenUtils.emitJavaHeaders( + javaWriter, + cfg.packageName(), + cfg.className(), + cfg.allStatic() ? true : false, + (String[]) cfg.imports().toArray(new String[] {}), + new String[] { "public" }, + interfaces, + null, + docEmitter); + } + + if (!cfg.allStatic() && cfg.emitImpl()) { + final List/*<String>*/ implDocs = cfg.javadocForClass(cfg.implClassName()); + CodeGenUtils.EmissionCallback docEmitter = + new CodeGenUtils.EmissionCallback() { + public void emit(PrintWriter w) { + for (Iterator iter = implDocs.iterator(); iter.hasNext(); ) { + w.println((String) iter.next()); + } + } + }; + + String[] interfaces; + List userSpecifiedInterfaces = null; + userSpecifiedInterfaces = cfg.implementedInterfaces(cfg.implClassName()); + int additionalNum = 0; + if (cfg.className() != null) { + additionalNum = 1; + } + interfaces = new String[additionalNum + userSpecifiedInterfaces.size()]; + userSpecifiedInterfaces.toArray(interfaces); + if (additionalNum == 1) { + interfaces[userSpecifiedInterfaces.size()] = cfg.className(); + } + + CodeGenUtils.emitJavaHeaders( + javaImplWriter, + cfg.implPackageName(), + cfg.implClassName(), + true, + (String[]) cfg.imports().toArray(new String[] {}), + new String[] { "public" }, + interfaces, + null, + docEmitter); + } + + if (cfg.emitImpl()) { + PrintWriter cWriter = cWriter(); + emitCHeader(cWriter, cfg.implClassName()); + } + } catch (Exception e) { + throw new RuntimeException( + "Error emitting all file headers: cfg.allStatic()=" + cfg.allStatic() + + " cfg.emitImpl()=" + cfg.emitImpl() + " cfg.emitInterface()=" + cfg.emitInterface(), + e); + } + + } + + protected void emitCHeader(PrintWriter cWriter, String className) { + cWriter.println("#include <jni.h>"); + cWriter.println(); + + if (getConfig().emitImpl()) { + cWriter.println("#include <assert.h>"); + cWriter.println(); + } + + for (Iterator iter = cfg.customCCode().iterator(); iter.hasNext(); ) { + cWriter.println((String) iter.next()); + } + cWriter.println(); + } + + /** + * Write out any footer information for the output files (closing brace of + * class definition, etc). + */ + protected void emitAllFileFooters(){ + if (cfg.allStatic() || cfg.emitInterface()) { + javaWriter().println(); + javaWriter().println("} // end of class " + cfg.className()); + } + if (!cfg.allStatic() && cfg.emitImpl()) + { + javaImplWriter().println(); + javaImplWriter().println("} // end of class " + cfg.implClassName()); + } + } + + private JavaType javaType(Class c) { + return JavaType.createForClass(c); + } + + /** Maps the C types in the specified function to Java types through + the MethodBinding interface. Note that the JavaTypes in the + returned MethodBinding are "intermediate" JavaTypes (some + potentially representing C pointers rather than true Java types) + and must be lowered to concrete Java types before creating + emitters for them. */ + private MethodBinding bindFunction(FunctionSymbol sym, + JavaType containingType, + Type containingCType, + MachineDescription curMachDesc) { + + MethodBinding binding = new MethodBinding(sym, containingType, containingCType); + + binding.setRenamedMethodName(cfg.getJavaMethodRename(sym.getName())); + + if (cfg.returnsString(binding.getName())) { + PointerType prt = sym.getReturnType().asPointer(); + if (prt == null || + prt.getTargetType().asInt() == null || + prt.getTargetType().getSize(curMachDesc) != 1) { + throw new RuntimeException( + "Cannot apply ReturnsString configuration directive to \"" + sym + + "\". ReturnsString requires native method to have return type \"char *\""); + } + binding.setJavaReturnType(javaType(java.lang.String.class)); + } else { + binding.setJavaReturnType(typeToJavaType(sym.getReturnType(), false, curMachDesc)); + } + + // List of the indices of the arguments in this function that should be + // converted from byte[] to String + List stringArgIndices = cfg.stringArguments(binding.getName()); + + for (int i = 0; i < sym.getNumArguments(); i++) { + Type cArgType = sym.getArgumentType(i); + JavaType mappedType = typeToJavaType(cArgType, true, curMachDesc); + //System.out.println("C arg type -> \"" + cArgType + "\"" ); + //System.out.println(" Java -> \"" + mappedType + "\"" ); + + // Take into account any ArgumentIsString configuration directives that apply + if (stringArgIndices != null && stringArgIndices.contains(new Integer(i))) { + //System.out.println("Forcing conversion of " + binding.getName() + " arg #" + i + " from byte[] to String "); + if (mappedType.isCVoidPointerType() || + mappedType.isCCharPointerType() || + (mappedType.isArray() && mappedType.getJavaClass() == ArrayTypes.byteBufferArrayClass)) { + // convert mapped type from void* and byte[] to String, or ByteBuffer[] to String[] + if (mappedType.getJavaClass() == ArrayTypes.byteBufferArrayClass) { + mappedType = javaType(ArrayTypes.stringArrayClass); + } else { + mappedType = javaType(String.class); + } + } + else { + throw new RuntimeException( + "Cannot apply ArgumentIsString configuration directive to " + + "argument " + i + " of \"" + sym + "\": argument type is not " + + "a \"void*\", \"char *\", or \"char**\" equivalent"); + } + } + binding.addJavaArgumentType(mappedType); + //System.out.println("During binding of [" + sym + "], added mapping from C type: " + cArgType + " to Java type: " + mappedType); + } + + //System.err.println("---> " + binding); + //System.err.println(" ---> " + binding.getCSymbol()); + return binding; + } + + + private MethodBinding lowerMethodBindingPointerTypes(MethodBinding inputBinding, + boolean convertToArrays, + boolean[] canProduceArrayVariant) { + MethodBinding result = inputBinding; + boolean arrayPossible = false; + + for (int i = 0; i < inputBinding.getNumArguments(); i++) { + JavaType t = inputBinding.getJavaArgumentType(i); + if (t.isCPrimitivePointerType()) { + if (t.isCVoidPointerType()) { + // These are always bound to java.nio.Buffer + result = result.replaceJavaArgumentType(i, JavaType.forNIOBufferClass()); + } else if (t.isCCharPointerType()) { + arrayPossible = true; + if (convertToArrays) { + result = result.replaceJavaArgumentType(i, javaType(ArrayTypes.byteArrayClass)); + } else { + result = result.replaceJavaArgumentType(i, JavaType.forNIOByteBufferClass()); + } + } else if (t.isCShortPointerType()) { + arrayPossible = true; + if (convertToArrays) { + result = result.replaceJavaArgumentType(i, javaType(ArrayTypes.shortArrayClass)); + } else { + result = result.replaceJavaArgumentType(i, JavaType.forNIOShortBufferClass()); + } + } else if (t.isCInt32PointerType()) { + arrayPossible = true; + if (convertToArrays) { + result = result.replaceJavaArgumentType(i, javaType(ArrayTypes.intArrayClass)); + } else { + result = result.replaceJavaArgumentType(i, JavaType.forNIOIntBufferClass()); + } + } else if (t.isCInt64PointerType()) { + arrayPossible = true; + if (convertToArrays) { + result = result.replaceJavaArgumentType(i, javaType(ArrayTypes.longArrayClass)); + } else { + result = result.replaceJavaArgumentType(i, JavaType.forNIOLongBufferClass()); + } + } else if (t.isCFloatPointerType()) { + arrayPossible = true; + if (convertToArrays) { + result = result.replaceJavaArgumentType(i, javaType(ArrayTypes.floatArrayClass)); + } else { + result = result.replaceJavaArgumentType(i, JavaType.forNIOFloatBufferClass()); + } + } else if (t.isCDoublePointerType()) { + arrayPossible = true; + if (convertToArrays) { + result = result.replaceJavaArgumentType(i, javaType(ArrayTypes.doubleArrayClass)); + } else { + result = result.replaceJavaArgumentType(i, JavaType.forNIODoubleBufferClass()); + } + } else { + throw new RuntimeException("Unknown C pointer type " + t); + } + } + } + + // Always return primitive pointer types as NIO buffers + JavaType t = result.getJavaReturnType(); + if (t.isCPrimitivePointerType()) { + if (t.isCVoidPointerType()) { + result = result.replaceJavaArgumentType(-1, JavaType.forNIOByteBufferClass()); + } else if (t.isCCharPointerType()) { + result = result.replaceJavaArgumentType(-1, JavaType.forNIOByteBufferClass()); + } else if (t.isCShortPointerType()) { + result = result.replaceJavaArgumentType(-1, JavaType.forNIOShortBufferClass()); + } else if (t.isCInt32PointerType()) { + result = result.replaceJavaArgumentType(-1, JavaType.forNIOIntBufferClass()); + } else if (t.isCInt64PointerType()) { + result = result.replaceJavaArgumentType(-1, JavaType.forNIOLongBufferClass()); + } else if (t.isCFloatPointerType()) { + result = result.replaceJavaArgumentType(-1, JavaType.forNIOFloatBufferClass()); + } else if (t.isCDoublePointerType()) { + result = result.replaceJavaArgumentType(-1, JavaType.forNIODoubleBufferClass()); + } else { + throw new RuntimeException("Unknown C pointer type " + t); + } + } + + if (canProduceArrayVariant != null) { + canProduceArrayVariant[0] = arrayPossible; + } + + return result; + } + + // Expands a MethodBinding containing C primitive pointer types into + // multiple variants taking Java primitive arrays and NIO buffers, subject + // to the per-function "NIO only" rule in the configuration file + protected List/*<MethodBinding>*/ expandMethodBinding(MethodBinding binding) { + List result = new ArrayList(); + // Indicates whether it is possible to produce an array variant + // Prevents e.g. char* -> String conversions from emitting two entry points + boolean[] canProduceArrayVariant = new boolean[1]; + + if (binding.signatureUsesCPrimitivePointers() || + binding.signatureUsesCVoidPointers() || + binding.signatureUsesCArrays()) { + result.add(lowerMethodBindingPointerTypes(binding, false, canProduceArrayVariant)); + + // FIXME: should add new configuration flag for this + if (canProduceArrayVariant[0] && + (binding.signatureUsesCPrimitivePointers() || + binding.signatureUsesCArrays()) && + !cfg.nioDirectOnly(binding.getName())) { + result.add(lowerMethodBindingPointerTypes(binding, true, null)); + } + } else { + result.add(binding); + } + + return result; + } + + private String resultName() { + return "_res"; + } + + private Type canonicalize(Type t) { + Type res = (Type) canonMap.get(t); + if (res != null) { + return res; + } + canonMap.put(t, t); + return t; + } +} |