/*

 * 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.

 */

/*

 * Native method support for java.util.zip.CRC32

 */

#include "jni.h"

#include "jni_util.h"

#include <zlib.h>

#include "java_util_zip_CRC32.h"

JNIEXPORT jint JNICALL

Java_java_util_zip_CRC32_update(JNIEnv *env, jclass cls, jint crc, jint b)

{

    Bytef buf[1];

    buf[0] = (Bytef)b;

    return crc32(crc, buf, 1);

}

JNIEXPORT jint JNICALL

Java_java_util_zip_CRC32_updateBytes0(JNIEnv *env, jclass cls, jint crc,

                                         jarray b, jint off, jint len)

{

    Bytef *buf = (*env)->GetPrimitiveArrayCritical(env, b, 0);

    if (buf) {

        crc = crc32(crc, buf + off, len);

        (*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0);

    }

    return crc;

}

ZIP_CRC32(jint crc, const jbyte *buf, jint len)

{

    return crc32(crc, (Bytef*)buf, len);

}

JNIEXPORT jint JNICALL

Java_java_util_zip_CRC32_updateByteBuffer0(JNIEnv *env, jclass cls, jint crc,

                                              jlong address, jint off, jint len)

{

    Bytef *buf = (Bytef *)jlong_to_ptr(address);

    if (buf) {

        crc = crc32(crc, buf + off, len);

    }

    return crc;

}