| /* |
| * 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 "CheckedInputStream.h" |
| |
| #include <decaf/lang/Math.h> |
| |
| using namespace decaf; |
| using namespace decaf::io; |
| using namespace decaf::lang; |
| using namespace decaf::lang::exceptions; |
| using namespace decaf::util; |
| using namespace decaf::util::zip; |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| CheckedInputStream::CheckedInputStream(InputStream* inputStream, Checksum* sum, bool own) : |
| FilterInputStream(inputStream, own), sum(sum) { |
| |
| if (sum == NULL) { |
| throw NullPointerException( |
| __FILE__, __LINE__, "The Checksum instance cannot be NULL."); |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| CheckedInputStream::~CheckedInputStream() { |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| long long CheckedInputStream::skip(long long num) { |
| |
| try { |
| |
| if (num <= 0) { |
| return 0; |
| } |
| |
| if (isClosed()) { |
| throw IOException( |
| __FILE__, __LINE__, "Stream is Closed."); |
| } |
| |
| // Perform smaller reads then the indicated amount |
| int remaining = Math::min((int) num, 2048); |
| long long skipped = 0; |
| |
| std::vector<unsigned char> buffer(remaining); |
| |
| while (skipped < num) { |
| |
| int result = this->inputStream->read(&buffer[0], remaining); |
| |
| if (isClosed()) { |
| throw IOException( |
| __FILE__, __LINE__, "Stream is Closed."); |
| } |
| |
| if (result == -1) { |
| return skipped; |
| } |
| |
| this->sum->update(buffer, 0, remaining); |
| |
| skipped += result; |
| remaining = (num - skipped) > (long long) buffer.size() ? (int) buffer.size() : (int) (num - skipped); |
| } |
| |
| return skipped; |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| int CheckedInputStream::doReadByte() { |
| |
| try { |
| |
| if (isClosed()) { |
| throw IOException( |
| __FILE__, __LINE__, "Stream is Closed."); |
| } |
| |
| int result = this->inputStream->read(); |
| |
| if (result != -1) { |
| this->sum->update(result); |
| } |
| |
| return result; |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| int CheckedInputStream::doReadArrayBounded(unsigned char* buffer, int size, int offset, int length) { |
| |
| try { |
| |
| if (buffer == NULL) { |
| throw NullPointerException( |
| __FILE__, __LINE__, "Buffer passed was NULL"); |
| } |
| |
| if (size < 0) { |
| throw IndexOutOfBoundsException( |
| __FILE__, __LINE__, "size parameter out of Bounds: %d.", size); |
| } |
| |
| if (offset > size || offset < 0) { |
| throw IndexOutOfBoundsException( |
| __FILE__, __LINE__, "offset parameter out of Bounds: %d.", offset); |
| } |
| |
| if (length < 0 || length > size - offset) { |
| throw IndexOutOfBoundsException( |
| __FILE__, __LINE__, "length parameter out of Bounds: %d.", length); |
| } |
| |
| if (length == 0) { |
| return 0; |
| } |
| |
| if (isClosed()) { |
| throw IOException( |
| __FILE__, __LINE__, "Stream is Closed."); |
| } |
| |
| int result = this->inputStream->read(buffer, size, offset, length); |
| |
| if (result != -1) { |
| // Only add the amount of bytes actually read to the Checksum. |
| this->sum->update(buffer, size, offset, result); |
| } |
| |
| return result; |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCH_RETHROW(IndexOutOfBoundsException) |
| DECAF_CATCH_RETHROW(NullPointerException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |