Adler32.c

/*
 * Copyright (c) 1997, 2012, 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
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 */

/*
 * Native method support for java.util.zip.Adler32
 */

#include"jni.h"
#include"jni_util.h"
#include"jlong.h"
#include<zlib.h>

#include"java_util_zip_Adler32.h"

JNIEXPORTjintJNICALL
Java_java_util_zip_Adler32_update(JNIEnv*env, jclasscls, jintadler, jintb)
{
Bytefbuf[1];

buf[0] = (Bytef)b;
returnadler32(adler, buf, 1);
}

JNIEXPORTjintJNICALL
Java_java_util_zip_Adler32_updateBytes(JNIEnv*env, jclasscls, jintadler,
jarrayb, jintoff, jintlen)
{
Bytef*buf= (*env)->GetPrimitiveArrayCritical(env, b, 0);
if (buf) {
adler=adler32(adler, buf+off, len);
 (*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0);
 }
returnadler;
}


JNIEXPORTjintJNICALL
Java_java_util_zip_Adler32_updateByteBuffer(JNIEnv*env, jclasscls, jintadler,
jlongaddress, jintoff, jintlen)
{
Bytef*buf= (Bytef*)jlong_to_ptr(address);
if (buf) {
adler=adler32(adler, buf+off, len);
 }
returnadler;
}