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#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#ifndef INFLATE64
# import "OFInflateStream.h"
#else
# import "OFInflate64Stream.h"
# define OFInflateStream OFInflate64Stream
#endif
#import "huffman_tree.h"
#import "OFInitializationFailedException.h"
#import "OFInvalidFormatException.h"
#import "OFNotOpenException.h"
#import "OFOutOfMemoryException.h"
#define BUFFER_SIZE OF_INFLATE_STREAM_BUFFER_SIZE
enum state {
BLOCK_HEADER,
UNCOMPRESSED_BLOCK_HEADER,
UNCOMPRESSED_BLOCK,
HUFFMAN_TREE,
HUFFMAN_BLOCK
};
enum huffman_state {
WRITE_VALUE,
AWAIT_CODE,
AWAIT_LENGTH_EXTRA_BITS,
AWAIT_DISTANCE,
AWAIT_DISTANCE_EXTRA_BITS,
PROCESS_PAIR
};
#ifndef INFLATE64
static const uint8_t numDistanceCodes = 30;
static const uint8_t lengthCodes[29] = {
/* indices are -257, values -3 */
0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 24, 28, 32, 40, 48, 56,
64, 80, 96, 112, 128, 160, 192, 224, 255
};
static const uint8_t lengthExtraBits[29] = {
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#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 "huffman_tree.h"
#import "OFInitializationFailedException.h"
#import "OFInvalidFormatException.h"
#import "OFNotOpenException.h"
#import "OFOutOfMemoryException.h"
#ifndef OF_INFLATE64_STREAM_M
# define BUFFER_SIZE OF_INFLATE_STREAM_BUFFER_SIZE
#else
# define BUFFER_SIZE OF_INFLATE64_STREAM_BUFFER_SIZE
#endif
enum state {
BLOCK_HEADER,
UNCOMPRESSED_BLOCK_HEADER,
UNCOMPRESSED_BLOCK,
HUFFMAN_TREE,
HUFFMAN_BLOCK
};
enum huffman_state {
WRITE_VALUE,
AWAIT_CODE,
AWAIT_LENGTH_EXTRA_BITS,
AWAIT_DISTANCE,
AWAIT_DISTANCE_EXTRA_BITS,
PROCESS_PAIR
};
#ifndef OF_INFLATE64_STREAM_M
static const uint8_t numDistanceCodes = 30;
static const uint8_t lengthCodes[29] = {
/* indices are -257, values -3 */
0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 24, 28, 32, 40, 48, 56,
64, 80, 96, 112, 128, 160, 192, 224, 255
};
static const uint8_t lengthExtraBits[29] = {
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for (uint16_t i = 0; i <= 31; i++)
lengths[i] = 5;
fixedDistTree = of_huffman_tree_construct(lengths, 32);
}
#ifndef INFLATE64
+ (instancetype)streamWithStream: (OFStream *)stream
{
return [[[self alloc] initWithStream: stream] autorelease];
}
- (instancetype)init
{
OF_INVALID_INIT_METHOD
}
- (instancetype)initWithStream: (OFStream *)stream
{
self = [super init];
@try {
_stream = [stream retain];
/* 0-7 address the bit, 8 means fetch next byte */
_bitIndex = 8;
#ifdef INFLATE64
_slidingWindowMask = 0xFFFF;
#else
_slidingWindowMask = 0x7FFF;
#endif
_slidingWindow = [self allocZeroedMemoryWithSize:
_slidingWindowMask + 1];
} @catch (id e) {
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for (uint16_t i = 0; i <= 31; i++)
lengths[i] = 5;
fixedDistTree = of_huffman_tree_construct(lengths, 32);
}
+ (instancetype)streamWithStream: (OFStream *)stream
{
return [[[self alloc] initWithStream: stream] autorelease];
}
- (instancetype)init
{
OF_INVALID_INIT_METHOD
}
- (instancetype)initWithStream: (OFStream *)stream
{
self = [super init];
@try {
_stream = [stream retain];
/* 0-7 address the bit, 8 means fetch next byte */
_bitIndex = 8;
#ifdef OF_INFLATE64_STREAM_M
_slidingWindowMask = 0xFFFF;
#else
_slidingWindowMask = 0x7FFF;
#endif
_slidingWindow = [self allocZeroedMemoryWithSize:
_slidingWindowMask + 1];
} @catch (id e) {
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of_huffman_tree_release(_context.huffman.litLenTree);
if (_context.huffman.distTree != fixedDistTree)
of_huffman_tree_release(_context.huffman.distTree);
}
[super dealloc];
}
#endif
- (size_t)lowlevelReadIntoBuffer: (void *)buffer_
length: (size_t)length
{
unsigned char *buffer = buffer_;
uint16_t bits, tmp, value;
size_t bytesWritten = 0;
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of_huffman_tree_release(_context.huffman.litLenTree);
if (_context.huffman.distTree != fixedDistTree)
of_huffman_tree_release(_context.huffman.distTree);
}
[super dealloc];
}
- (size_t)lowlevelReadIntoBuffer: (void *)buffer_
length: (size_t)length
{
unsigned char *buffer = buffer_;
uint16_t bits, tmp, value;
size_t bytesWritten = 0;
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