ObjFW  Diff

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/*
 * Copyright (c) 2008-2022 Jonathan Schleifer <js@nil.im>
 * Copyright (c) 2008-2024 Jonathan Schleifer <js@nil.im>
 *
 * 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.
 */

#include "config.h"

#include <stdlib.h>
#include <string.h>

#include <assert.h>

#ifndef OF_INFLATE64_STREAM_M
# import "OFInflateStream.h"
#else
# import "OFInflate64Stream.h"
# define OFInflateStream OFInflate64Stream
#endif
#import "OFHuffmanTree.h"
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#endif
static const uint8_t codeLengthsOrder[19] = {
	16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15
};
static OFHuffmanTree fixedLitLenTree, fixedDistTree;

@implementation OFInflateStream
@synthesize underlyingStream = _stream;

static OF_INLINE bool
tryReadBits(OFInflateStream *stream, uint16_t *bits, uint8_t count)
{
	uint16_t ret = stream->_savedBits;

	assert(stream->_savedBitsLength < count);
	OFAssert(stream->_savedBitsLength < count);

	for (uint_fast8_t i = stream->_savedBitsLength; i < count; i++) {
		if OF_UNLIKELY (stream->_bitIndex == 8) {
			if OF_LIKELY (stream->_bufferIndex <
			    stream->_bufferLength)
				stream->_byte =
				    stream->_buffer[stream->_bufferIndex++];
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- (int)fileDescriptorForReading
{
	return ((id <OFReadyForReadingObserving>)_stream)
	    .fileDescriptorForReading;
}

- (bool)hasDataInReadBuffer
- (bool)lowlevelHasDataInReadBuffer
{
	return (super.hasDataInReadBuffer || _stream.hasDataInReadBuffer ||
	return (_stream.hasDataInReadBuffer ||
	    _bufferLength - _bufferIndex > 0);
}

- (void)close
{
	if (_stream == nil)
		@throw [OFNotOpenException exceptionWithObject: self];