| /** |
| * 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 <zconf.h> |
| #include <zlib.h> |
| #include "lib/commons.h" |
| #include "GzipCodec.h" |
| #include <iostream> |
| |
| namespace NativeTask { |
| |
| GzipCompressStream::GzipCompressStream(OutputStream * stream, uint32_t bufferSizeHint) |
| : CompressStream(stream), _compressedBytesWritten(0), _zstream(NULL), _finished(false) { |
| _buffer = new char[bufferSizeHint]; |
| _capacity = bufferSizeHint; |
| _zstream = malloc(sizeof(z_stream)); |
| z_stream * zstream = (z_stream*)_zstream; |
| memset(zstream, 0, sizeof(z_stream)); |
| if (Z_OK != deflateInit2(zstream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 31, 8, |
| Z_DEFAULT_STRATEGY)) { |
| free(_zstream); |
| _zstream = NULL; |
| THROW_EXCEPTION(IOException, "deflateInit2 failed"); |
| } |
| zstream->next_out = (Bytef *)_buffer; |
| zstream->avail_out = _capacity; |
| } |
| |
| GzipCompressStream::~GzipCompressStream() { |
| if (_zstream != NULL) { |
| deflateEnd((z_stream*)_zstream); |
| free(_zstream); |
| _zstream = NULL; |
| } |
| delete[] _buffer; |
| _buffer = NULL; |
| } |
| |
| void GzipCompressStream::write(const void * buff, uint32_t length) { |
| z_stream * zstream = (z_stream*)_zstream; |
| zstream->next_in = (Bytef*)buff; |
| zstream->avail_in = length; |
| while (true) { |
| int ret = deflate(zstream, Z_NO_FLUSH); |
| if (ret == Z_OK) { |
| if (zstream->avail_out == 0) { |
| _stream->write(_buffer, _capacity); |
| _compressedBytesWritten += _capacity; |
| zstream->next_out = (Bytef *)_buffer; |
| zstream->avail_out = _capacity; |
| } |
| if (zstream->avail_in == 0) { |
| break; |
| } |
| } else { |
| THROW_EXCEPTION(IOException, "deflate return error"); |
| } |
| } |
| _finished = false; |
| } |
| |
| void GzipCompressStream::flush() { |
| z_stream * zstream = (z_stream*)_zstream; |
| while (true) { |
| int ret = deflate(zstream, Z_FINISH); |
| if (ret == Z_OK) { |
| if (zstream->avail_out == 0) { |
| _stream->write(_buffer, _capacity); |
| _compressedBytesWritten += _capacity; |
| zstream->next_out = (Bytef *)_buffer; |
| zstream->avail_out = _capacity; |
| } else { |
| THROW_EXCEPTION(IOException, "flush state error"); |
| } |
| } else if (ret == Z_STREAM_END) { |
| size_t wt = zstream->next_out - (Bytef*)_buffer; |
| _stream->write(_buffer, wt); |
| _compressedBytesWritten += wt; |
| zstream->next_out = (Bytef *)_buffer; |
| zstream->avail_out = _capacity; |
| break; |
| } |
| } |
| _finished = true; |
| _stream->flush(); |
| } |
| |
| void GzipCompressStream::resetState() { |
| z_stream * zstream = (z_stream*)_zstream; |
| deflateReset(zstream); |
| } |
| |
| void GzipCompressStream::close() { |
| if (!_finished) { |
| flush(); |
| } |
| } |
| |
| void GzipCompressStream::writeDirect(const void * buff, uint32_t length) { |
| if (!_finished) { |
| flush(); |
| } |
| _stream->write(buff, length); |
| _compressedBytesWritten += length; |
| } |
| |
| ////////////////////////////////////////////////////////////// |
| |
| GzipDecompressStream::GzipDecompressStream(InputStream * stream, uint32_t bufferSizeHint) |
| : DecompressStream(stream), _compressedBytesRead(0), _zstream(NULL) { |
| _buffer = new char[bufferSizeHint]; |
| _capacity = bufferSizeHint; |
| _zstream = malloc(sizeof(z_stream)); |
| z_stream * zstream = (z_stream*)_zstream; |
| memset(zstream, 0, sizeof(z_stream)); |
| if (Z_OK != inflateInit2(zstream, 31)) { |
| free(_zstream); |
| _zstream = NULL; |
| THROW_EXCEPTION(IOException, "inflateInit2 failed"); |
| } |
| zstream->next_in = NULL; |
| zstream->avail_in = 0; |
| _eof = false; |
| } |
| |
| GzipDecompressStream::~GzipDecompressStream() { |
| if (_zstream != NULL) { |
| inflateEnd((z_stream*)_zstream); |
| free(_zstream); |
| _zstream = NULL; |
| } |
| delete[] _buffer; |
| _buffer = NULL; |
| } |
| |
| int32_t GzipDecompressStream::read(void * buff, uint32_t length) { |
| z_stream * zstream = (z_stream*)_zstream; |
| zstream->next_out = (Bytef*)buff; |
| zstream->avail_out = length; |
| while (true) { |
| if (zstream->avail_in == 0) { |
| int32_t rd = _stream->read(_buffer, _capacity); |
| if (rd <= 0) { |
| _eof = true; |
| size_t wt = zstream->next_out - (Bytef*)buff; |
| return wt > 0 ? wt : -1; |
| } else { |
| _compressedBytesRead += rd; |
| zstream->next_in = (Bytef*)_buffer; |
| zstream->avail_in = rd; |
| } |
| } |
| int ret = inflate(zstream, Z_NO_FLUSH); |
| if (ret == Z_OK || ret == Z_STREAM_END) { |
| if (zstream->avail_out == 0) { |
| return length; |
| } |
| } else { |
| return -1; |
| } |
| } |
| return -1; |
| } |
| |
| void GzipDecompressStream::close() { |
| } |
| |
| int32_t GzipDecompressStream::readDirect(void * buff, uint32_t length) { |
| int32_t ret = _stream->readFully(buff, length); |
| if (ret > 0) { |
| _compressedBytesRead += ret; |
| } |
| return ret; |
| } |
| |
| } // namespace NativeTask |
| |