| /* |
| * 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * Native method support for java.util.zip.CRC32 |
| */ |
| |
| #include "jni.h" |
| #include "jni_util.h" |
| #include <zlib.h> |
| |
| #include "java_util_zip_CRC32.h" |
| |
| JNIEXPORT jint JNICALL |
| Java_java_util_zip_CRC32_update(JNIEnv *env, jclass cls, jint crc, jint b) |
| { |
| Bytef buf[1]; |
| |
| buf[0] = (Bytef)b; |
| return crc32(crc, buf, 1); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_java_util_zip_CRC32_updateBytes0(JNIEnv *env, jclass cls, jint crc, |
| jarray b, jint off, jint len) |
| { |
| Bytef *buf = (*env)->GetPrimitiveArrayCritical(env, b, 0); |
| if (buf) { |
| crc = crc32(crc, buf + off, len); |
| (*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0); |
| } |
| return crc; |
| } |
| |
| jint JNICALL |
| ZIP_CRC32(jint crc, const jbyte *buf, jint len) |
| { |
| return crc32(crc, (Bytef*)buf, len); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_java_util_zip_CRC32_updateByteBuffer0(JNIEnv *env, jclass cls, jint crc, |
| jlong address, jint off, jint len) |
| { |
| Bytef *buf = (Bytef *)jlong_to_ptr(address); |
| if (buf) { |
| crc = crc32(crc, buf + off, len); |
| } |
| return crc; |
| } |