1 /*

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

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     7  * published by the Free Software Foundation.

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     9  * This code is distributed in the hope that it will be useful, but WITHOUT

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    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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

    13  * accompanied this code).

    14  *

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

    18  *

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    23 

    24 /* @test

    25  * @bug 8149170

    26  * @summary Test native functions return booleans as 0/1 but differently than java functions

    27  * @library /testlibrary

    28  * @compile BoolConstructor.java

    29  * @run main/native NativeSmallIntCallsTest

    30  */

    31 

    32 // This test shows that returns from native calls for boolean truncate to JNI_TRUE if value != 0

    33 // and JNI_FALSE if value returned is 0.

    34 

    35 import jdk.test.lib.Asserts;

    36 

    37 public class NativeSmallIntCallsTest {

    38     static native boolean nativeCastToBoolCallTrue();

    39     static native boolean nativeCastToBoolCallFalse();

    40     static native boolean nativeCallBoolConstructor(int visible, boolean expected);

    41     static {

    42         System.loadLibrary("NativeSmallIntCalls");

    43     }

    44 

    45     public static void main(java.lang.String[] unused) throws Exception {

    46         // Call through jni

    47         // JNI makes all results != 0 true for compatibility

    48         boolean nativeTrueVal = nativeCastToBoolCallTrue();

    49         Asserts.assertTrue(nativeTrueVal, "trueval is false!");

    50 

    51         boolean nativeFalseVal = nativeCastToBoolCallFalse();

    52         Asserts.assertTrue(nativeFalseVal, "falseval is false in native!");

    53 

    54         // Call a constructor or method that passes jboolean values into Java from native

    55         nativeCallBoolConstructor(1, true);

    56         nativeCallBoolConstructor(0x10, true);

    57         nativeCallBoolConstructor(0x100, false);

    58         nativeCallBoolConstructor(0x1000, false);

    59     }

    60 }