1 /*
   2  * Copyright (c) 1997, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   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.
  10  *
  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
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 /*
  27  * Native method support for java.util.zip.Adler32
  28  */
  29 
  30 #include "jni.h"
  31 #include "jni_util.h"
  32 #include "zlib.h"
  33 #include "jlong.h"

  34 
  35 #include "java_util_zip_Adler32.h"
  36 
  37 JNIEXPORT jint JNICALL
  38 Java_java_util_zip_Adler32_update(JNIEnv *env, jclass cls, jint adler, jint b)
  39 {
  40     Bytef buf[1];
  41 
  42     buf[0] = (Bytef)b;
  43     return adler32(adler, buf, 1);
  44 }
  45 
  46 JNIEXPORT jint JNICALL
  47 Java_java_util_zip_Adler32_updateBytes(JNIEnv *env, jclass cls, jint adler,
  48                                        jarray b, jint off, jint len)
  49 {
  50     Bytef *buf = (*env)->GetPrimitiveArrayCritical(env, b, 0);
  51     if (buf) {
  52         adler = adler32(adler, buf + off, len);
  53         (*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0);
  54     }
  55     return adler;
  56 }
  57 
  58 
  59 JNIEXPORT jint JNICALL
  60 Java_java_util_zip_Adler32_updateByteBuffer(JNIEnv *env, jclass cls, jint adler,
  61                                        jlong address, jint off, jint len)
  62 {
  63     Bytef *buf = (Bytef *)jlong_to_ptr(address);
  64     if (buf) {
  65         adler = adler32(adler, buf + off, len);
  66     }
  67     return adler;
  68 }
  69 
  70 
--- EOF ---