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73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/*
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* Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* Native method support for java.util.zip.CRC32
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*/
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#include "jni.h"
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#include "jni_util.h"
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#include <zlib.h>
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#include "java_util_zip_CRC32.h"
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JNIEXPORT jint JNICALL
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Java_java_util_zip_CRC32_update(JNIEnv *env, jclass cls, jint crc, jint b)
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{
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Bytef buf[1];
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buf[0] = (Bytef)b;
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return crc32(crc, buf, 1);
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}
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JNIEXPORT jint JNICALL
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Java_java_util_zip_CRC32_updateBytes0(JNIEnv *env, jclass cls, jint crc,
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jarray b, jint off, jint len)
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{
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Bytef *buf = (*env)->GetPrimitiveArrayCritical(env, b, 0);
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if (buf) {
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crc = crc32(crc, buf + off, len);
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(*env)->ReleasePrimitiveArrayCritical(env, b, buf, 0);
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}
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return crc;
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}
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jint JNICALL
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ZIP_CRC32(jint crc, const jbyte *buf, jint len)
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{
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return crc32(crc, (Bytef*)buf, len);
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}
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JNIEXPORT jint JNICALL
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Java_java_util_zip_CRC32_updateByteBuffer0(JNIEnv *env, jclass cls, jint crc,
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jlong address, jint off, jint len)
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{
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Bytef *buf = (Bytef *)jlong_to_ptr(address);
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if (buf) {
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crc = crc32(crc, buf + off, len);
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}
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return crc;
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}
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