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A library for invoking native functions from java
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/*
* Copyright (C) 2008-2010 Wayne Meissner
*
* This file is part of the JNR project.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jnr.ffi.provider.jffi;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.Type;
import java.util.Arrays;
import java.util.Map;
public class CodegenUtils {
/**
* Creates a dotted class name from a path/package name.
*
* @param p The path/package name.
* @return The dotted class name.
*/
public static String c(String p) {
return p.replace('/', '.');
}
/**
* Creates a class path name, from a Class.
*
* @param n A class.
* @return The class path name.
*/
public static String p(Class n) {
return n.getName().replace('.','/');
}
/**
* Creates a class path name, from a class name.
*
* @param n A class name.
* @return A class path name.
*/
public static String p(String n) {
return n.replace('.', '/');
}
/**
* Creates a class identifier of form Labc/abc;, from a Class.
*
* @param n A class.
* @return The class identifier.
*/
public static String ci(Class n) {
if (n.isArray()) {
n = n.getComponentType();
if (n.isPrimitive()) {
if (n == Byte.TYPE) {
return "[B";
} else if (n == Boolean.TYPE) {
return "[Z";
} else if (n == Short.TYPE) {
return "[S";
} else if (n == Character.TYPE) {
return "[C";
} else if (n == Integer.TYPE) {
return "[I";
} else if (n == Float.TYPE) {
return "[F";
} else if (n == Double.TYPE) {
return "[D";
} else if (n == Long.TYPE) {
return "[J";
} else {
throw new RuntimeException("Unrecognized type in compiler: " + n.getName());
}
} else {
return "[" + ci(n);
}
} else {
if (n.isPrimitive()) {
if (n == Byte.TYPE) {
return "B";
} else if (n == Boolean.TYPE) {
return "Z";
} else if (n == Short.TYPE) {
return "S";
} else if (n == Character.TYPE) {
return "C";
} else if (n == Integer.TYPE) {
return "I";
} else if (n == Float.TYPE) {
return "F";
} else if (n == Double.TYPE) {
return "D";
} else if (n == Long.TYPE) {
return "J";
} else if (n == Void.TYPE) {
return "V";
} else {
throw new RuntimeException("Unrecognized type in compiler: " + n.getName());
}
} else {
return "L" + p(n) + ";";
}
}
}
/**
* Creates a human-readable representation, from a Class.
*
* @param n A class.
* @return A human-readable representation.
*/
public static String human(Class n) {
return n.getCanonicalName();
}
/**
* Create a method signature from the given param types and return values.
*
* @param retval The return value class.
* @param params The parameters.
* @return A method signature.
*/
public static String sig(Class retval, Class... params) {
return sigParams(params) + ci(retval);
}
public static String sig(Class retval, String descriptor, Class... params) {
return sigParams(descriptor, params) + ci(retval);
}
public static String sigParams(Class... params) {
StringBuilder signature = new StringBuilder("(");
for (int i = 0; i < params.length; i++) {
signature.append(ci(params[i]));
}
signature.append(")");
return signature.toString();
}
public static String sigParams(String descriptor, Class... params) {
StringBuilder signature = new StringBuilder("(");
signature.append(descriptor);
for (int i = 0; i < params.length; i++) {
signature.append(ci(params[i]));
}
signature.append(")");
return signature.toString();
}
public static String pretty(Class retval, Class... params) {
return prettyParams(params) + human(retval);
}
public static String prettyParams(Class... params) {
StringBuilder signature = new StringBuilder("(");
for (int i = 0; i < params.length; i++) {
signature.append(human(params[i]));
if (i < params.length - 1) signature.append(',');
}
signature.append(")");
return signature.toString();
}
public static Class[] params(Class... classes) {
return classes;
}
public static Class[] params(Class cls, int times) {
Class[] classes = new Class[times];
Arrays.fill(classes, cls);
return classes;
}
public static Class[] params(Class cls1, Class clsFill, int times) {
Class[] classes = new Class[times + 1];
Arrays.fill(classes, clsFill);
classes[0] = cls1;
return classes;
}
public static String getAnnotatedBindingClassName(String javaMethodName, String typeName, boolean isStatic, int required, int optional, boolean multi, boolean framed) {
String commonClassSuffix;
String marker = framed ? "$RUBYFRAMEDINVOKER$" : "$RUBYINVOKER$";
if (multi) {
commonClassSuffix = (isStatic ? "$s" : "$i" ) + "_method_multi" + marker + javaMethodName;
} else {
commonClassSuffix = (isStatic ? "$s" : "$i" ) + "_method_" + required + "_" + optional + marker + javaMethodName;
}
return typeName + commonClassSuffix;
}
public static void visitAnnotationFields(AnnotationVisitor visitor, Map fields) {
for (Map.Entry fieldEntry : fields.entrySet()) {
Object value = fieldEntry.getValue();
if (value.getClass().isArray()) {
Object[] values = (Object[]) value;
AnnotationVisitor arrayV = visitor.visitArray(fieldEntry.getKey());
for (int i = 0; i < values.length; i++) {
arrayV.visit(null, values[i]);
}
arrayV.visitEnd();
} else if (value.getClass().isEnum()) {
visitor.visitEnum(fieldEntry.getKey(), ci(value.getClass()), value.toString());
} else if (value instanceof Class) {
visitor.visit(fieldEntry.getKey(), Type.getType((Class)value));
} else {
visitor.visit(fieldEntry.getKey(), value);
}
}
}
}