| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "CRC32.h" |
| |
| #include <decaf/internal/util/zip/zlib.h> |
| |
| using namespace decaf; |
| using namespace decaf::lang; |
| using namespace decaf::lang::exceptions; |
| using namespace decaf::util; |
| using namespace decaf::util::zip; |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| CRC32::CRC32() : Checksum(), value(0) { |
| this->reset(); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| CRC32::~CRC32() { |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void CRC32::reset() { |
| this->value = crc32((uLong) this->value, NULL, 0); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| long long CRC32::getValue() const { |
| return this->value; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void CRC32::update(const std::vector<unsigned char>& buffer) { |
| this->update(&buffer[0], (int) buffer.size(), 0, (int) buffer.size()); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void CRC32::update(const std::vector<unsigned char>& buffer, int offset, int length) { |
| |
| if (offset + length > (int) buffer.size()) { |
| throw IndexOutOfBoundsException( |
| __FILE__, __LINE__, "Given offset + length exceeds the length of the buffer."); |
| } |
| |
| this->update(&buffer[0], (int) buffer.size(), offset, length); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void CRC32::update(int byte) { |
| this->value = crc32((uLong) this->value, (const Bytef*) &byte, 1); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void CRC32::update(const unsigned char* buffer, int size, int offset, int length) { |
| |
| if (offset + length > size) { |
| throw IndexOutOfBoundsException( |
| __FILE__, __LINE__, "Given offset + length exceeds the length of the buffer."); |
| } |
| |
| this->value = crc32((uLong) this->value, (const Bytef*) (buffer + offset), (uInt) length); |
| } |