1/*
2 * Copyright (c) 1997, 2018, 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.CRC32
28 */
29
30#include "jni.h"
31#include "jni_util.h"
32#include <zlib.h>
33
34#include "java_util_zip_CRC32.h"
35
36JNIEXPORT jint JNICALL
37Java_java_util_zip_CRC32_update(JNIEnv *env, jclass cls, jint crc, jint b)
38{
39 Bytef buf[1];
40
41 buf[0] = (Bytef)b;
42 return crc32(crc, buf, 1);
43}
44
45JNIEXPORT jint JNICALL
46Java_java_util_zip_CRC32_updateBytes0(JNIEnv *env, jclass cls, jint crc,
47 jarray b, jint off, jint len)
48{
49 Bytef *buf = (*env)->GetPrimitiveArrayCritical(env, b, 0);
50 if (buf) {
51 crc = crc32(crc, buf + off, len);
52 (*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0);
53 }
54 return crc;
55}
56
57JNIEXPORT jint
58ZIP_CRC32(jint crc, const jbyte *buf, jint len)
59{
60 return crc32(crc, (Bytef*)buf, len);
61}
62
63JNIEXPORT jint JNICALL
64Java_java_util_zip_CRC32_updateByteBuffer0(JNIEnv *env, jclass cls, jint crc,
65 jlong address, jint off, jint len)
66{
67 Bytef *buf = (Bytef *)jlong_to_ptr(address);
68 if (buf) {
69 crc = crc32(crc, buf + off, len);
70 }
71 return crc;
72}
73