Artifact c61dd6afda5beb9bb021253b78612c14878d5baa490f0e902f911dc72547fbfb:
- File
src/OFInflateStream.h
— part of check-in
[d3158d091f]
at
2016-01-05 22:00:03
on branch trunk
— (u)int_fast*_t -> (u)int*_t
(U)INT_FAST*_MAX is broken on Android, which makes (u)int_fast*_t
dangerous to use while it does not provide any real speed benefit. (user: js, size: 2902) [annotate] [blame] [check-ins using]
/* * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 * Jonathan Schleifer <js@heap.zone> * * All rights reserved. * * This file is part of ObjFW. It may be distributed under the terms of the * Q Public License 1.0, which can be found in the file LICENSE.QPL included in * the packaging of this file. * * Alternatively, it may be distributed under the terms of the GNU General * Public License, either version 2 or 3, which can be found in the file * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this * file. */ #import "OFStream.h" OF_ASSUME_NONNULL_BEGIN #define OF_INFLATE_STREAM_BUFFER_SIZE 4096 /*! * @class OFInflateStream OFInflateStream.h ObjFW/OFInflateStream.h * * @brief A class that handles Deflate decompression transparently for an * underlying stream. */ @interface OFInflateStream: OFStream { #ifdef OF_INFLATE_STREAM_M @public #endif OFStream *_stream; uint8_t _buffer[OF_INFLATE_STREAM_BUFFER_SIZE]; uint16_t _bufferIndex, _bufferLength; uint8_t _byte; uint8_t _bitIndex, _savedBitsLength; uint16_t _savedBits; @protected uint8_t *_slidingWindow; uint16_t _slidingWindowIndex, _slidingWindowMask; enum { OF_INFLATE_STREAM_BLOCK_HEADER, OF_INFLATE_STREAM_UNCOMPRESSED_BLOCK_HEADER, OF_INFLATE_STREAM_UNCOMPRESSED_BLOCK, OF_INFLATE_STREAM_HUFFMAN_TREE, OF_INFLATE_STREAM_HUFFMAN_BLOCK } _state; union { struct { uint8_t position; uint8_t length[4]; } uncompressedHeader; struct { uint16_t position, length; } uncompressed; struct { struct huffman_tree *litLenTree, *distTree; struct huffman_tree *codeLenTree, *treeIter; uint8_t *lengths; uint16_t receivedCount; uint8_t value, litLenCodesCount, distCodesCount; uint8_t codeLenCodesCount; } huffmanTree; struct { struct huffman_tree *litLenTree, *distTree, *treeIter; enum { OF_INFLATE_STREAM_WRITE_VALUE, OF_INFLATE_STREAM_AWAIT_CODE, OF_INFLATE_STREAM_AWAIT_LENGTH_EXTRA_BITS, OF_INFLATE_STREAM_AWAIT_DISTANCE, OF_INFLATE_STREAM_AWAIT_DISTANCE_EXTRA_BITS, OF_INFLATE_STREAM_PROCESS_PAIR } state; uint16_t value, length, distance; uint16_t extraBits; } huffman; } _context; bool _inLastBlock, _atEndOfStream; } /*! * @brief Creates a new OFInflateStream with the specified underlying stream. * * @param stream The underlying stream to which compressed data is written or * from which compressed data is read * @return A new, autoreleased OFInflateStream */ + (instancetype)streamWithStream: (OFStream*)stream; /*! * @brief Initializes an already allocated OFInflateStream with the specified * underlying stream. * * @param stream The underlying stream to which compressed data is written or * from which compressed data is read * @return A initialized OFInflateStream */ - initWithStream: (OFStream*)stream; @end OF_ASSUME_NONNULL_END