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trees.c File Reference
#include "deflate.h"

Go to the source code of this file.

Classes

struct  static_tree_desc_s
 

Macros

#define MAX_BL_BITS   7
 
#define END_BLOCK   256
 
#define REP_3_6   16
 
#define REPZ_3_10   17
 
#define REPZ_11_138   18
 
#define DIST_CODE_LEN   512 /* see definition of array dist_code below */
 
#define send_code(s, c, tree)   send_bits(s, tree[c].Code, tree[c].Len)
 
#define put_short(s, w)
 
#define send_bits(s, value, length)
 
#define SMALLEST   1
 
#define pqremove(s, tree, top)
 
#define smaller(tree, n, m, depth)
 

Functions

local void tr_static_init OF ((void))
 
local void init_block OF ((deflate_state *s))
 
local void pqdownheap OF ((deflate_state *s, ct_data *tree, int k))
 
local void gen_bitlen OF ((deflate_state *s, tree_desc *desc))
 
local void gen_codes OF ((ct_data *tree, int max_code, ushf *bl_count))
 
local void scan_tree OF ((deflate_state *s, ct_data *tree, int max_code))
 
local void send_all_trees OF ((deflate_state *s, int lcodes, int dcodes, int blcodes))
 
local void compress_block OF ((deflate_state *s, ct_data *ltree, ct_data *dtree))
 
local unsigned bi_reverse OF ((unsigned value, int length))
 
local void copy_block OF ((deflate_state *s, charf *buf, unsigned len, int header))
 
local void tr_static_init ()
 
void ZLIB_INTERNAL _tr_init (deflate_state *s)
 
local void init_block (deflate_state *s)
 
local void pqdownheap (deflate_state *s, ct_data *tree, int k)
 
local void gen_bitlen (deflate_state *s, tree_desc *desc)
 
local void gen_codes (ct_data *tree, int max_code, ushf *bl_count)
 
local void build_tree (deflate_state *s, tree_desc *desc)
 
local void scan_tree (deflate_state *s, ct_data *tree, int max_code)
 
local void send_tree (deflate_state *s, ct_data *tree, int max_code)
 
local int build_bl_tree (deflate_state *s)
 
local void send_all_trees (deflate_state *s, int lcodes, int dcodes, int blcodes)
 
void ZLIB_INTERNAL _tr_stored_block (deflate_state *s, charf *buf, ulg stored_len, int last)
 
void ZLIB_INTERNAL _tr_flush_bits (deflate_state *s)
 
void ZLIB_INTERNAL _tr_align (deflate_state *s)
 
void ZLIB_INTERNAL _tr_flush_block (deflate_state *s, charf *buf, ulg stored_len, int last)
 
int ZLIB_INTERNAL _tr_tally (deflate_state *s, unsigned dist, unsigned lc)
 
local void compress_block (deflate_state *s, ct_data *ltree, ct_data *dtree)
 
local int detect_data_type (deflate_state *s)
 
local unsigned bi_reverse (unsigned code, int len)
 
local void bi_flush (deflate_state *s)
 
local void bi_windup (deflate_state *s)
 
local void copy_block (deflate_state *s, charf *buf, unsigned len, int header)
 

Variables

local const int extra_lbits [LENGTH_CODES] = {0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0}
 
local const int extra_dbits [D_CODES] = {0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13}
 
local const int extra_blbits [BL_CODES] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,3,7}
 
local const uch bl_order [BL_CODES] = {16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15}
 
local ct_data static_ltree [L_CODES+2]
 
local ct_data static_dtree [D_CODES]
 
uch _dist_code [DIST_CODE_LEN]
 
uch _length_code [MAX_MATCH-MIN_MATCH+1]
 
local int base_length [LENGTH_CODES]
 
local int base_dist [D_CODES]
 
local static_tree_desc static_l_desc
 
local static_tree_desc static_d_desc
 
local static_tree_desc static_bl_desc
 

Macro Definition Documentation

#define DIST_CODE_LEN   512 /* see definition of array dist_code below */

Definition at line 81 of file trees.c.

#define END_BLOCK   256

Definition at line 50 of file trees.c.

#define MAX_BL_BITS   7

Definition at line 47 of file trees.c.

#define pqremove (   s,
  tree,
  top 
)
Value:
{\
top = s->heap[SMALLEST]; \
s->heap[SMALLEST] = s->heap[s->heap_len--]; \
pqdownheap(s, tree, SMALLEST); \
}

Definition at line 432 of file trees.c.

#define put_short (   s,
  w 
)
Value:
{ \
put_byte(s, (uch)((w) & 0xff)); \
put_byte(s, (uch)((ush)(w) >> 8)); \
}

Definition at line 176 of file trees.c.

#define REP_3_6   16

Definition at line 53 of file trees.c.

#define REPZ_11_138   18

Definition at line 59 of file trees.c.

#define REPZ_3_10   17

Definition at line 56 of file trees.c.

#define send_bits (   s,
  value,
  length 
)
Value:
{ int len = length;\
if (s->bi_valid > (int)Buf_size - len) {\
int val = value;\
s->bi_buf |= (ush)val << s->bi_valid;\
put_short(s, s->bi_buf);\
s->bi_buf = (ush)val >> (Buf_size - s->bi_valid);\
s->bi_valid += len - Buf_size;\
} else {\
s->bi_buf |= (ush)(value) << s->bi_valid;\
s->bi_valid += len;\
}\
}

Definition at line 213 of file trees.c.

#define send_code (   s,
  c,
  tree 
)    send_bits(s, tree[c].Code, tree[c].Len)

Definition at line 163 of file trees.c.

#define smaller (   tree,
  n,
  m,
  depth 
)
Value:
(tree[n].Freq < tree[m].Freq || \
(tree[n].Freq == tree[m].Freq && depth[n] <= depth[m]))

Definition at line 443 of file trees.c.

#define SMALLEST   1

Definition at line 424 of file trees.c.

Function Documentation

void ZLIB_INTERNAL _tr_align ( deflate_state *  s)

Definition at line 892 of file trees.c.

void ZLIB_INTERNAL _tr_flush_bits ( deflate_state *  s)

Definition at line 882 of file trees.c.

void ZLIB_INTERNAL _tr_flush_block ( deflate_state *  s,
charf *  buf,
ulg  stored_len,
int  last 
)

Definition at line 907 of file trees.c.

void ZLIB_INTERNAL _tr_init ( deflate_state *  s)

Definition at line 381 of file trees.c.

void ZLIB_INTERNAL _tr_stored_block ( deflate_state *  s,
charf *  buf,
ulg  stored_len,
int  last 
)

Definition at line 865 of file trees.c.

int ZLIB_INTERNAL _tr_tally ( deflate_state *  s,
unsigned  dist,
unsigned  lc 
)

Definition at line 1008 of file trees.c.

local void bi_flush ( deflate_state *  s)

Definition at line 1167 of file trees.c.

local unsigned bi_reverse ( unsigned  code,
int  len 
)

Definition at line 1152 of file trees.c.

local void bi_windup ( deflate_state *  s)

Definition at line 1184 of file trees.c.

local int build_bl_tree ( deflate_state *  s)

Definition at line 801 of file trees.c.

local void build_tree ( deflate_state *  s,
tree_desc *  desc 
)

Definition at line 617 of file trees.c.

local void compress_block ( deflate_state *  s,
ct_data *  ltree,
ct_data *  dtree 
)

Definition at line 1058 of file trees.c.

local void copy_block ( deflate_state *  s,
charf *  buf,
unsigned  len,
int  header 
)

Definition at line 1203 of file trees.c.

local int detect_data_type ( deflate_state *  s)

Definition at line 1118 of file trees.c.

local void gen_bitlen ( deflate_state *  s,
tree_desc *  desc 
)

Definition at line 488 of file trees.c.

local void gen_codes ( ct_data *  tree,
int  max_code,
ushf *  bl_count 
)

Definition at line 575 of file trees.c.

local void init_block ( deflate_state *  s)

Definition at line 409 of file trees.c.

local void tr_static_init OF ( (void)  )
local void init_block OF ( (deflate_state *s)  )
local void pqdownheap OF ( (deflate_state *s, ct_data *tree, int k)  )
local void gen_bitlen OF ( (deflate_state *s, tree_desc *desc)  )
local void gen_codes OF ( (ct_data *tree, int max_code, ushf *bl_count)  )
local void scan_tree OF ( (deflate_state *s, ct_data *tree, int max_code)  )
local void send_all_trees OF ( (deflate_state *s, int lcodes, int dcodes, int blcodes)  )
local void compress_block OF ( (deflate_state *s, ct_data *ltree, ct_data *dtree)  )
local unsigned bi_reverse OF ( (unsigned value, int length)  )
local void copy_block OF ( (deflate_state *s, charf *buf, unsigned len, int header)  )
local void pqdownheap ( deflate_state *  s,
ct_data *  tree,
int  k 
)

Definition at line 453 of file trees.c.

local void scan_tree ( deflate_state *  s,
ct_data *  tree,
int  max_code 
)

Definition at line 705 of file trees.c.

local void send_all_trees ( deflate_state *  s,
int  lcodes,
int  dcodes,
int  blcodes 
)

Definition at line 836 of file trees.c.

local void send_tree ( deflate_state *  s,
ct_data *  tree,
int  max_code 
)

Definition at line 750 of file trees.c.

local void tr_static_init ( )

Definition at line 234 of file trees.c.

Variable Documentation

uch _dist_code[DIST_CODE_LEN]

Definition at line 98 of file trees.c.

uch _length_code[MAX_MATCH-MIN_MATCH+1]

Definition at line 104 of file trees.c.

local int base_dist[D_CODES]

Definition at line 110 of file trees.c.

local int base_length[LENGTH_CODES]

Definition at line 107 of file trees.c.

local const uch bl_order[BL_CODES] = {16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15}

Definition at line 72 of file trees.c.

local const int extra_blbits[BL_CODES] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,3,7}

Definition at line 69 of file trees.c.

local const int extra_dbits[D_CODES] = {0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13}

Definition at line 66 of file trees.c.

local const int extra_lbits[LENGTH_CODES] = {0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0}

Definition at line 63 of file trees.c.

local static_tree_desc static_bl_desc
Initial value:
=
{(const ct_data *)0, extra_blbits, 0, BL_CODES, MAX_BL_BITS}

Definition at line 131 of file trees.c.

local static_tree_desc static_d_desc
Initial value:
=
{static_dtree, extra_dbits, 0, D_CODES, MAX_BITS}

Definition at line 128 of file trees.c.

local ct_data static_dtree[D_CODES]

Definition at line 93 of file trees.c.

local static_tree_desc static_l_desc
Initial value:
=
{static_ltree, extra_lbits, LITERALS+1, L_CODES, MAX_BITS}

Definition at line 125 of file trees.c.

local ct_data static_ltree[L_CODES+2]

Definition at line 86 of file trees.c.

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