/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

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 */

package com.apple.jobjc;

public class Function {

    private static native long getFxnPtrForFunctionName(final String functionName);

    private static native long getFxnPtrForFunctionNameAndLib(final long libPtr, final String functionName);

    final long fxnPtr;

    Function(final long fxnPtr) {

        this.fxnPtr = fxnPtr;

    }

    public Function(final String name) {

        this(getFxnPtr(name));

    }

    public Function(final MacOSXFramework framework, final String name) {

        this(getFxnPtr(name, framework));

    }

    static long getFxnPtr(final String name){

        long fxnPtr = getFxnPtrForFunctionName(name);

        if(fxnPtr == 0) throw new RuntimeException("Function pointer for " + name + " not found in runtime.");

        return fxnPtr;

    }

    static long getFxnPtr(final String name, final MacOSXFramework framework){

        long fxnPtr = 0;

        for(int i = 0; fxnPtr == 0 && i < framework.nativeLibPtrs.length; i++){

            fxnPtr = getFxnPtrForFunctionNameAndLib(framework.nativeLibPtrs[i], name);

            if(fxnPtr != 0) return fxnPtr;

        }

        throw new RuntimeException("Function pointer for " + name + " not found in framework " + framework + ".");

    }

}