/*
* Copyright (C) 2012 RoboVM AB
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/gpl-2.0.html>.
*/
package org.robovm.compiler;
/**
* Mangles native method signatures into short and long JNI function names.
* See {@link http://docs.oracle.com/javase/8/docs/technotes/guides/jni/spec/design.html#resolving_native_method_names}
* for how a VM resolves JNI functions.
*/
public class Mangler {
/**
* Returns the short version of the JNI function name for a method.
*
* @param owner the internal name of the class of the method.
* @param name the name of the method.
*/
public static String mangleNativeMethod(String owner, String name) {
return mangleNativeMethod(owner, name, null);
}
/**
* Returns the long version of the JNI function name for a method.
*
* @param owner the internal name of the class of the method.
* @param name the name of the method.
* @param desc the method descriptor.
*/
public static String mangleNativeMethod(String owner, String name, String desc) {
StringBuilder sb = new StringBuilder();
sb.append("Java_");
sb.append(mangleNativeString(owner));
sb.append("_");
sb.append(mangleNativeString(name));
if (desc != null) {
sb.append("__");
sb.append(mangleNativeString(desc.substring(1, desc.lastIndexOf(')'))));
}
return sb.toString();
}
static String mangleNativeString(String name) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < name.length(); i++) {
char c = name.charAt(i);
if (c >= '0' && c <= '9' || c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z') {
sb.append(c);
} else if (c == '_') {
sb.append("_1");
} else if (c == ';') {
sb.append("_2");
} else if (c == '[') {
sb.append("_3");
} else if (c == '/') {
sb.append("_");
} else {
sb.append(String.format("_0%04x", (int) c));
}
}
return sb.toString();
}
}