| /* |
| * 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 "BufferedOutputStream.h" |
| |
| #include <decaf/lang/System.h> |
| #include <decaf/lang/Math.h> |
| |
| using namespace std; |
| using namespace decaf; |
| using namespace decaf::io; |
| using namespace decaf::lang; |
| using namespace decaf::lang::exceptions; |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| BufferedOutputStream::BufferedOutputStream(OutputStream* stream, bool own) : |
| FilterOutputStream(stream, own), buffer(NULL), bufferSize(0), head(0), tail(0) { |
| |
| // Default to 1k buffer. |
| init(8192); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| BufferedOutputStream::BufferedOutputStream(OutputStream* stream, int bufSize, bool own) : |
| FilterOutputStream(stream, own), buffer(NULL), bufferSize(0), head(0), tail(0) { |
| |
| try { |
| this->init(bufSize); |
| } |
| DECAF_CATCH_RETHROW(IllegalArgumentException) |
| DECAF_CATCHALL_THROW(IllegalArgumentException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| BufferedOutputStream::~BufferedOutputStream() { |
| |
| try { |
| this->close(); |
| } |
| DECAF_CATCHALL_NOTHROW() |
| |
| delete [] buffer; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void BufferedOutputStream::init(int bufSize) { |
| |
| if (bufSize < 0) { |
| throw IllegalArgumentException(__FILE__, __LINE__, "Size of Buffer cannot be negative."); |
| } |
| |
| this->bufferSize = bufSize; |
| |
| buffer = new unsigned char[bufSize]; |
| head = tail = 0; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void BufferedOutputStream::emptyBuffer() { |
| |
| if (this->outputStream == NULL) { |
| throw IOException(__FILE__, __LINE__, "BufferedOutputStream::emptyBuffer - OutputStream is closed"); |
| } |
| |
| try { |
| if (this->head != this->tail) { |
| this->outputStream->write(this->buffer + this->head, this->tail - this->head); |
| } |
| this->head = this->tail = 0; |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void BufferedOutputStream::flush() { |
| |
| try { |
| |
| if (isClosed()) { |
| throw IOException(__FILE__, __LINE__, "BufferedOutputStream::write - Stream is clsoed"); |
| } |
| |
| // Empty the contents of the buffer to the output stream. |
| emptyBuffer(); |
| |
| // Flush the output stream. |
| outputStream->flush(); |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void BufferedOutputStream::doWriteByte(const unsigned char c) { |
| |
| try { |
| |
| if (isClosed()) { |
| throw IOException(__FILE__, __LINE__, "BufferedOutputStream::write - Stream is clsoed"); |
| } |
| |
| if (tail >= bufferSize) { |
| emptyBuffer(); |
| } |
| |
| buffer[tail++] = c; |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void BufferedOutputStream::doWriteArray(const unsigned char* buffer, int size) { |
| |
| try { |
| |
| if (size == 0) { |
| return; |
| } |
| |
| if (isClosed()) { |
| throw IOException(__FILE__, __LINE__, "BufferedOutputStream::write - Stream is clsoed"); |
| } |
| |
| this->doWriteArrayBounded(buffer, size, 0, size); |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void BufferedOutputStream::doWriteArrayBounded(const unsigned char* buffer, int size, int offset, int length) { |
| |
| try { |
| |
| if (length == 0) { |
| return; |
| } |
| |
| if (isClosed()) { |
| throw IOException(__FILE__, __LINE__, "BufferedOutputStream::write - Stream is clsoed"); |
| } |
| |
| if (buffer == NULL) { |
| throw NullPointerException(__FILE__, __LINE__, "BufferedOutputStream::write - Buffer passed is 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); |
| } |
| |
| // Iterate until all the data is written. |
| for (int pos = 0; pos < length;) { |
| |
| if (tail >= bufferSize) { |
| emptyBuffer(); |
| } |
| |
| // Get the number of bytes left to write. |
| int bytesToWrite = Math::min(bufferSize - tail, length - pos); |
| |
| System::arraycopy(buffer, offset + pos, this->buffer, this->tail, bytesToWrite); |
| |
| // Increase the tail position. |
| tail += bytesToWrite; |
| |
| // Decrease the number of bytes to write. |
| pos += bytesToWrite; |
| } |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCH_RETHROW(NullPointerException) |
| DECAF_CATCH_RETHROW(IndexOutOfBoundsException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |