1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 #define LOG_TAG "CRC32" 19 20 #include "JNIHelp.h" 21 #include "JniConstants.h" 22 #include "ScopedPrimitiveArray.h" 23 #include "jni.h" 24 #include "zlib.h" 25 26 static jlong CRC32_updateImpl(JNIEnv* env, jobject, jbyteArray byteArray, int off, int len, jlong crc) { 27 ScopedByteArrayRO bytes(env, byteArray); 28 if (bytes.get() == NULL) { 29 return 0; 30 } 31 jlong result = crc32(crc, reinterpret_cast<const Bytef*>(bytes.get() + off), len); 32 return result; 33 } 34 35 static jlong CRC32_updateByteImpl(JNIEnv*, jobject, jbyte val, jlong crc) { 36 return crc32(crc, reinterpret_cast<const Bytef*>(&val), 1); 37 } 38 39 static JNINativeMethod gMethods[] = { 40 NATIVE_METHOD(CRC32, updateImpl, "([BIIJ)J"), 41 NATIVE_METHOD(CRC32, updateByteImpl, "(BJ)J"), 42 }; 43 void register_java_util_zip_CRC32(JNIEnv* env) { 44 jniRegisterNativeMethods(env, "java/util/zip/CRC32", gMethods, NELEM(gMethods)); 45 } 46
