1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
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7  * published by the Free Software Foundation.  Oracle designates this
8  * particular file as subject to the "Classpath" exception as provided
9  * by Oracle in the LICENSE file that accompanied this code.
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11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
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19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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24  */
25 package com.apple.jobjc;
26 
27 
28 public class Function {
getFxnPtrForFunctionName(final String functionName)29     private static native long getFxnPtrForFunctionName(final String functionName);
getFxnPtrForFunctionNameAndLib(final long libPtr, final String functionName)30     private static native long getFxnPtrForFunctionNameAndLib(final long libPtr, final String functionName);
31 
32     final long fxnPtr;
33 
Function(final long fxnPtr)34     Function(final long fxnPtr) {
35         this.fxnPtr = fxnPtr;
36     }
37 
Function(final String name)38     public Function(final String name) {
39         this(getFxnPtr(name));
40     }
41 
Function(final MacOSXFramework framework, final String name)42     public Function(final MacOSXFramework framework, final String name) {
43         this(getFxnPtr(name, framework));
44     }
45 
getFxnPtr(final String name)46     static long getFxnPtr(final String name){
47         long fxnPtr = getFxnPtrForFunctionName(name);
48         if(fxnPtr == 0) throw new RuntimeException("Function pointer for " + name + " not found in runtime.");
49         return fxnPtr;
50     }
51 
getFxnPtr(final String name, final MacOSXFramework framework)52     static long getFxnPtr(final String name, final MacOSXFramework framework){
53         long fxnPtr = 0;
54         for(int i = 0; fxnPtr == 0 && i < framework.nativeLibPtrs.length; i++){
55             fxnPtr = getFxnPtrForFunctionNameAndLib(framework.nativeLibPtrs[i], name);
56             if(fxnPtr != 0) return fxnPtr;
57         }
58         throw new RuntimeException("Function pointer for " + name + " not found in framework " + framework + ".");
59     }
60 }
61