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 "JNIHelp.h"
31 #include "jni.h"
32 #include "jni_util.h"
33 #include <zlib.h>
34
35
36
37 #define NATIVE_METHOD(className, functionName, signature) \
38 { #functionName, signature, (void*)(Java_java_util_zip_ ## className ## _ ## functionName) }
39
40 JNIEXPORT jint JNICALL
Java_java_util_zip_Adler32_update(JNIEnv * env,jclass cls,jint adler,jint b)41 Java_java_util_zip_Adler32_update(JNIEnv *env, jclass cls, jint adler, jint b)
42 {
43 Bytef buf[1];
44
45 buf[0] = (Bytef)b;
46 return adler32(adler, buf, 1);
47 }
48
49 JNIEXPORT jint JNICALL
Java_java_util_zip_Adler32_updateBytes(JNIEnv * env,jclass cls,jint adler,jarray b,jint off,jint len)50 Java_java_util_zip_Adler32_updateBytes(JNIEnv *env, jclass cls, jint adler,
51 jarray b, jint off, jint len)
52 {
53 Bytef *buf = (*env)->GetPrimitiveArrayCritical(env, b, 0);
54 if (buf) {
55 adler = adler32(adler, buf + off, len);
56 (*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0);
57 }
58 return adler;
59 }
60
61 JNIEXPORT jint JNICALL
Java_java_util_zip_Adler32_updateByteBuffer(JNIEnv * env,jclass cls,jint adler,jlong address,jint off,jint len)62 Java_java_util_zip_Adler32_updateByteBuffer(JNIEnv *env, jclass cls, jint adler,
63 jlong address, jint off, jint len)
64 {
65 Bytef *buf = (Bytef *)jlong_to_ptr(address);
66 if (buf) {
67 adler = adler32(adler, buf + off, len);
68 }
69 return adler;
70 }
71
72 static JNINativeMethod gMethods[] = {
73 NATIVE_METHOD(Adler32, update, "(II)I"),
74 NATIVE_METHOD(Adler32, updateBytes, "(I[BII)I"),
75 NATIVE_METHOD(Adler32, updateByteBuffer, "(IJII)I"),
76 };
77
register_java_util_zip_Adler32(JNIEnv * env)78 void register_java_util_zip_Adler32(JNIEnv* env) {
79 jniRegisterNativeMethods(env, "java/util/zip/Adler32", gMethods, NELEM(gMethods));
80 }
81