1/* 2 * Copyright (c) 1997, 2012, 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 "jlong.h" 34#include <zlib.h> 35 36 37 38#define NATIVE_METHOD(className, functionName, signature) \ 39{ #functionName, signature, (void*)(Java_java_util_zip_ ## className ## _ ## functionName) } 40 41JNIEXPORT jint JNICALL 42Java_java_util_zip_Adler32_update(JNIEnv *env, jclass cls, jint adler, jint b) 43{ 44 Bytef buf[1]; 45 46 buf[0] = (Bytef)b; 47 return adler32(adler, buf, 1); 48} 49 50JNIEXPORT jint JNICALL 51Java_java_util_zip_Adler32_updateBytes(JNIEnv *env, jclass cls, jint adler, 52 jarray b, jint off, jint len) 53{ 54 Bytef *buf = (*env)->GetPrimitiveArrayCritical(env, b, 0); 55 if (buf) { 56 adler = adler32(adler, buf + off, len); 57 (*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0); 58 } 59 return adler; 60} 61 62JNIEXPORT jint JNICALL 63Java_java_util_zip_Adler32_updateByteBuffer(JNIEnv *env, jclass cls, jint adler, 64 jlong address, jint off, jint len) 65{ 66 Bytef *buf = (Bytef *)jlong_to_ptr(address); 67 if (buf) { 68 adler = adler32(adler, buf + off, len); 69 } 70 return adler; 71} 72 73static JNINativeMethod gMethods[] = { 74 NATIVE_METHOD(Adler32, update, "(II)I"), 75 NATIVE_METHOD(Adler32, updateBytes, "(I[BII)I"), 76 NATIVE_METHOD(Adler32, updateByteBuffer, "(IJII)I"), 77}; 78 79void register_java_util_zip_Adler32(JNIEnv* env) { 80 jniRegisterNativeMethods(env, "java/util/zip/Adler32", gMethods, NELEM(gMethods)); 81} 82