/*

 * Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.

 * 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

 * questions.

 */

#include "jni.h"

#include "jni_util.h"

#include "jvm.h"

#include "jdk_util.h"

#include "sun_misc_Version.h"

static void setStaticIntField(JNIEnv* env, jclass cls, const char* name, jint value)

{

    jfieldID fid;

    fid = (*env)->GetStaticFieldID(env, cls, name, "I");

    if (fid != 0) {

        (*env)->SetStaticIntField(env, cls, fid, value);

    }

}

typedef void (JNICALL *GetJvmVersionInfo_fp)(JNIEnv*, jvm_version_info*, size_t);

JNIEXPORT jboolean JNICALL

Java_sun_misc_Version_getJvmVersionInfo(JNIEnv *env, jclass cls)

{

    jvm_version_info info;

    GetJvmVersionInfo_fp func_p;

    if (!JDK_InitJvmHandle()) {

        JNU_ThrowInternalError(env, "Handle for JVM not found for symbol lookup");

        return JNI_FALSE;

    }

    func_p = (GetJvmVersionInfo_fp) JDK_FindJvmEntry("JVM_GetVersionInfo");

    if (func_p == NULL) {

        return JNI_FALSE;

    }

    (*func_p)(env, &info, sizeof(info));

    setStaticIntField(env, cls, "jvm_major_version", JVM_VERSION_MAJOR(info.jvm_version));

    JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);

    setStaticIntField(env, cls, "jvm_minor_version", JVM_VERSION_MINOR(info.jvm_version));

    JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);

    setStaticIntField(env, cls, "jvm_security_version", JVM_VERSION_SECURITY(info.jvm_version));

    JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);

    setStaticIntField(env, cls, "jvm_build_number", JVM_VERSION_BUILD(info.jvm_version));

    JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);

    JNU_CHECK_EXCEPTION_RETURN(env, JNI_FALSE);

    return JNI_TRUE;

}

JNIEXPORT void JNICALL

Java_sun_misc_Version_getJdkVersionInfo(JNIEnv *env, jclass cls)

{

    jdk_version_info info;

    JDK_GetVersionInfo0(&info, sizeof(info));

    setStaticIntField(env, cls, "jdk_major_version", JDK_VERSION_MAJOR(info.jdk_version));

    JNU_CHECK_EXCEPTION(env);

    setStaticIntField(env, cls, "jdk_minor_version", JDK_VERSION_MINOR(info.jdk_version));

    JNU_CHECK_EXCEPTION(env);

    setStaticIntField(env, cls, "jdk_security_version", JDK_VERSION_SECURITY(info.jdk_version));

    JNU_CHECK_EXCEPTION(env);

    setStaticIntField(env, cls, "jdk_build_number", JDK_VERSION_BUILD(info.jdk_version));

    JNU_CHECK_EXCEPTION(env);

    JNU_CHECK_EXCEPTION(env);

}