deflate.c File Reference

#include "deflate.h"

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Classes
struct	config_s

Macros
#define	NIL   0
#define	TOO_FAR   4096
#define	RANK(f)   (((f) * 2) - ((f) > 4 ? 9 : 0))
#define	UPDATE_HASH(s, h, c)   (h = (((h)<<s->hash_shift) ^ (c)) & s->hash_mask)
#define	INSERT_STRING(s, str, match_head)
#define	CLEAR_HASH(s)
#define	HCRC_UPDATE(beg)
#define	check_match(s, start, match, length)
#define	FLUSH_BLOCK_ONLY(s, last)
#define	FLUSH_BLOCK(s, last)
#define	MAX_STORED   65535
#define	MIN(a, b)   ((a) > (b) ? (b) : (a))

Typedefs
typedef block_state compress_func	OF((deflate_state *s, int flush))
typedef struct config_s	config

Enumerations
enum	block_state { need_more , block_done , finish_started , finish_done }

Functions
int deflateStateCheck	OF ((z_streamp strm))
void slide_hash	OF ((deflate_state *s))
void putShortMSB	OF ((deflate_state *s, uInt b))
unsigned read_buf	OF ((z_streamp strm, Bytef *buf, unsigned size))
uInt longest_match	OF ((deflate_state *s, IPos cur_match))
void	slide_hash (deflate_state *s)
int ZEXPORT	deflateInit_ (z_streamp strm, int level, const char *version, int stream_size)
int ZEXPORT	deflateInit2_ (z_streamp strm, int level, int method, int windowBits, int memLevel, int strategy, const char *version, int stream_size)
int	deflateStateCheck (z_streamp strm)
int ZEXPORT	deflateSetDictionary (z_streamp strm, const Bytef *dictionary, uInt dictLength)
int ZEXPORT	deflateGetDictionary (z_streamp strm, Bytef *dictionary, uInt *dictLength)
int ZEXPORT	deflateResetKeep (z_streamp strm)
int ZEXPORT	deflateReset (z_streamp strm)
int ZEXPORT	deflateSetHeader (z_streamp strm, gz_headerp head)
int ZEXPORT	deflatePending (z_streamp strm, unsigned *pending, int *bits)
int ZEXPORT	deflatePrime (z_streamp strm, int bits, int value)
int ZEXPORT	deflateParams (z_streamp strm, int level, int strategy)
int ZEXPORT	deflateTune (z_streamp strm, int good_length, int max_lazy, int nice_length, int max_chain)
uLong ZEXPORT	deflateBound (z_streamp strm, uLong sourceLen)
void	putShortMSB (deflate_state *s, uInt b)
void	flush_pending (z_streamp strm)
int ZEXPORT	deflate (z_streamp strm, int flush)
int ZEXPORT	deflateEnd (z_streamp strm)
int ZEXPORT	deflateCopy (z_streamp dest, z_streamp source)
unsigned	read_buf (z_streamp strm, Bytef *buf, unsigned size)
void	lm_init (deflate_state *s)
uInt	longest_match (deflate_state *s, IPos cur_match)
void	fill_window (deflate_state *s)
block_state	deflate_stored (deflate_state *s, int flush)
block_state	deflate_fast (deflate_state *s, int flush)
block_state	deflate_slow (deflate_state *s, int flush)
block_state	deflate_rle (deflate_state *s, int flush)
block_state	deflate_huff (deflate_state *s, int flush)

Variables
const char	deflate_copyright []
const config	configuration_table [10]

Macro Definition Documentation

check_match

#define check_match	(		s,
			start,
			match,
			length
	)

Definition at line 1509 of file deflate.c.

CLEAR_HASH

#define CLEAR_HASH

(

s

)

Value:

    do { \
        s->head[s->hash_size-1] = NIL; \
        zmemzero((Bytef *)s->head, \
                 (unsigned)(s->hash_size-1)*sizeof(*s->head)); \
    } while (0)

Definition at line 192 of file deflate.c.

FLUSH_BLOCK

#define FLUSH_BLOCK	(		s,
			last
	)

Value:

   { \
   FLUSH_BLOCK_ONLY(s, last); \
   if (s->strm->avail_out == 0) return (last) ? finish_started : need_more; \
}

Definition at line 1659 of file deflate.c.

FLUSH_BLOCK_ONLY

#define FLUSH_BLOCK_ONLY	(		s,
			last
	)

Value:

   { \
   _tr_flush_block(s, (s->block_start >= 0L ? \
                   (charf *)&s->window[(unsigned)s->block_start] : \
                   (charf *)Z_NULL), \
                (ulg)((long)s->strstart - s->block_start), \
                (last)); \
   s->block_start = s->strstart; \
   flush_pending(s->strm); \
   Tracev((stderr,"[FLUSH]")); \
}

Definition at line 1647 of file deflate.c.

HCRC_UPDATE

#define HCRC_UPDATE

(

beg

)

Value:

    do { \
        if (s->gzhead->hcrc && s->pending > (beg)) \
            strm->adler = crc32(strm->adler, s->pending_buf + (beg), \
                                s->pending - (beg)); \
    } while (0)

Definition at line 796 of file deflate.c.

INSERT_STRING

#define INSERT_STRING	(		s,
			str,
			match_head
	)

Value:

   (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
    match_head = s->prev[(str) & s->w_mask] = s->head[s->ins_h], \
    s->head[s->ins_h] = (Pos)(str))

Definition at line 182 of file deflate.c.

MAX_STORED

#define MAX_STORED   65535

Definition at line 1665 of file deflate.c.

MIN

#define MIN	(		a,
			b
	)		((a) > (b) ? (b) : (a))

Definition at line 1668 of file deflate.c.

NIL

#define NIL   0

Definition at line 107 of file deflate.c.

RANK

#define RANK

(

f

)

(((f) * 2) - ((f) > 4 ? 9 : 0))

Definition at line 155 of file deflate.c.

TOO_FAR

#define TOO_FAR   4096

Definition at line 111 of file deflate.c.

UPDATE_HASH

#define UPDATE_HASH	(		s,
			h,
			c
	)		(h = (((h)<<s->hash_shift) ^ (c)) & s->hash_mask)

Definition at line 163 of file deflate.c.

Typedef Documentation

config

typedef struct config_s config

OF

typedef block_state compress_func OF((deflate_state *s, int flush))

Definition at line 73 of file deflate.c.

Enumeration Type Documentation

block_state

enum block_state

Enumerator
need_more
block_done
finish_started
finish_done

Definition at line 66 of file deflate.c.

Function Documentation

deflate()

int ZEXPORT deflate	(	z_streamp	strm,
		int	flush
	)

Definition at line 804 of file deflate.c.

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deflate_fast()

block_state deflate_fast	(	deflate_state *	s,
		int	flush
	)

Definition at line 1872 of file deflate.c.

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deflate_huff()

block_state deflate_huff	(	deflate_state *	s,
		int	flush
	)

Definition at line 2178 of file deflate.c.

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deflate_rle()

block_state deflate_rle	(	deflate_state *	s,
		int	flush
	)

Definition at line 2105 of file deflate.c.

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deflate_slow()

block_state deflate_slow	(	deflate_state *	s,
		int	flush
	)

Definition at line 1974 of file deflate.c.

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deflate_stored()

block_state deflate_stored	(	deflate_state *	s,
		int	flush
	)

Definition at line 1685 of file deflate.c.

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deflateBound()

uLong ZEXPORT deflateBound	(	z_streamp	strm,
		uLong	sourceLen
	)

Definition at line 693 of file deflate.c.

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deflateCopy()

int ZEXPORT deflateCopy	(	z_streamp	dest,
		z_streamp	source
	)

Definition at line 1145 of file deflate.c.

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deflateEnd()

int ZEXPORT deflateEnd

(

z_streamp

strm

)

Definition at line 1119 of file deflate.c.

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deflateGetDictionary()

int ZEXPORT deflateGetDictionary	(	z_streamp	strm,
		Bytef *	dictionary,
		uInt *	dictLength
	)

Definition at line 485 of file deflate.c.

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deflateInit2_()

int ZEXPORT deflateInit2_	(	z_streamp	strm,
		int	level,
		int	method,
		int	windowBits,
		int	memLevel,
		int	strategy,
		const char *	version,
		int	stream_size
	)

Definition at line 243 of file deflate.c.

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deflateInit_()

int ZEXPORT deflateInit_	(	z_streamp	strm,
		int	level,
		const char *	version,
		int	stream_size
	)

Definition at line 231 of file deflate.c.

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deflateParams()

int ZEXPORT deflateParams	(	z_streamp	strm,
		int	level,
		int	strategy
	)

Definition at line 609 of file deflate.c.

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deflatePending()

int ZEXPORT deflatePending	(	z_streamp	strm,
		unsigned *	pending,
		int *	bits
	)

Definition at line 568 of file deflate.c.

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deflatePrime()

int ZEXPORT deflatePrime	(	z_streamp	strm,
		int	bits,
		int	value
	)

Definition at line 582 of file deflate.c.

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deflateReset()

int ZEXPORT deflateReset

(

z_streamp

strm

)

Definition at line 545 of file deflate.c.

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deflateResetKeep()

int ZEXPORT deflateResetKeep

(

z_streamp

strm

)

Definition at line 507 of file deflate.c.

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deflateSetDictionary()

int ZEXPORT deflateSetDictionary	(	z_streamp	strm,
		const Bytef *	dictionary,
		uInt	dictLength
	)

Definition at line 416 of file deflate.c.

deflateSetHeader()

int ZEXPORT deflateSetHeader	(	z_streamp	strm,
		gz_headerp	head
	)

Definition at line 557 of file deflate.c.

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deflateStateCheck()

int deflateStateCheck

(

z_streamp

strm

)

Definition at line 393 of file deflate.c.

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deflateTune()

int ZEXPORT deflateTune	(	z_streamp	strm,
		int	good_length,
		int	max_lazy,
		int	nice_length,
		int	max_chain
	)

Definition at line 658 of file deflate.c.

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fill_window()

void fill_window

(

deflate_state *

s

)

Definition at line 1522 of file deflate.c.

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flush_pending()

void flush_pending

(

z_streamp

strm

)

Definition at line 771 of file deflate.c.

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lm_init()

void lm_init

(

deflate_state *

s

)

Definition at line 1234 of file deflate.c.

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longest_match()

uInt longest_match	(	deflate_state *	s,
		IPos	cur_match
	)

Definition at line 1276 of file deflate.c.

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OF() [1/5]

void slide_hash OF

(

(deflate_state *s)

)

OF() [2/5]

uInt longest_match OF

(

(deflate_state *s, IPos cur_match)

)

OF() [3/5]

void putShortMSB OF

(

(deflate_state *s, uInt b)

)

OF() [4/5]

int deflateStateCheck OF

(

(z_streamp strm)

)

OF() [5/5]

unsigned read_buf OF

(

(z_streamp strm, Bytef *buf, unsigned size)

)

putShortMSB()

void putShortMSB	(	deflate_state *	s,
		uInt	b
	)

Definition at line 757 of file deflate.c.

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read_buf()

unsigned read_buf	(	z_streamp	strm,
		Bytef *	buf,
		unsigned	size
	)

Definition at line 1204 of file deflate.c.

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slide_hash()

void slide_hash

(

deflate_state *

s

)

Definition at line 204 of file deflate.c.

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Variable Documentation

configuration_table

const config configuration_table[10]

Initial value:

= {
 
 {0,    0,  0,    0, deflate_stored},  
 {4,    4,  8,    4, deflate_fast}, 
 {4,    5, 16,    8, deflate_fast},
 {4,    6, 32,   32, deflate_fast},
 
 {4,    4, 16,   16, deflate_slow},  
 {8,   16, 32,   32, deflate_slow},
 {8,   16, 128, 128, deflate_slow},
 {8,   32, 128, 256, deflate_slow},
 {32, 128, 258, 1024, deflate_slow},
 {32, 258, 258, 4096, deflate_slow}}

Definition at line 134 of file deflate.c.

deflate_copyright

const char deflate_copyright[]

Initial value:

=
   " deflate 1.2.12 Copyright 1995-2022 Jean-loup Gailly and Mark Adler "

Definition at line 54 of file deflate.c.