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-rw-r--r--lib/zlib/deflate.h27
1 files changed, 12 insertions, 15 deletions
diff --git a/lib/zlib/deflate.h b/lib/zlib/deflate.h
index 23ecdd3..17c2261 100644
--- a/lib/zlib/deflate.h
+++ b/lib/zlib/deflate.h
@@ -1,5 +1,5 @@
/* deflate.h -- internal compression state
- * Copyright (C) 1995-2016 Jean-loup Gailly
+ * Copyright (C) 1995-2018 Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -217,7 +217,7 @@ typedef struct internal_state {
/* Depth of each subtree used as tie breaker for trees of equal frequency
*/
- uchf *l_buf; /* buffer for literals or lengths */
+ uchf *sym_buf; /* buffer for distances and literals/lengths */
uInt lit_bufsize;
/* Size of match buffer for literals/lengths. There are 4 reasons for
@@ -239,13 +239,8 @@ typedef struct internal_state {
* - I can't count above 4
*/
- uInt last_lit; /* running index in l_buf */
-
- ushf *d_buf;
- /* Buffer for distances. To simplify the code, d_buf and l_buf have
- * the same number of elements. To use different lengths, an extra flag
- * array would be necessary.
- */
+ uInt sym_next; /* running index in sym_buf */
+ uInt sym_end; /* symbol table full when sym_next reaches this */
ulg opt_len; /* bit length of current block with optimal trees */
ulg static_len; /* bit length of current block with static trees */
@@ -325,20 +320,22 @@ void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf,
# define _tr_tally_lit(s, c, flush) \
{ uch cc = (c); \
- s->d_buf[s->last_lit] = 0; \
- s->l_buf[s->last_lit++] = cc; \
+ s->sym_buf[s->sym_next++] = 0; \
+ s->sym_buf[s->sym_next++] = 0; \
+ s->sym_buf[s->sym_next++] = cc; \
s->dyn_ltree[cc].Freq++; \
- flush = (s->last_lit == s->lit_bufsize-1); \
+ flush = (s->sym_next == s->sym_end); \
}
# define _tr_tally_dist(s, distance, length, flush) \
{ uch len = (uch)(length); \
ush dist = (ush)(distance); \
- s->d_buf[s->last_lit] = dist; \
- s->l_buf[s->last_lit++] = len; \
+ s->sym_buf[s->sym_next++] = dist; \
+ s->sym_buf[s->sym_next++] = dist >> 8; \
+ s->sym_buf[s->sym_next++] = len; \
dist--; \
s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \
s->dyn_dtree[d_code(dist)].Freq++; \
- flush = (s->last_lit == s->lit_bufsize-1); \
+ flush = (s->sym_next == s->sym_end); \
}
#else
# define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)