diff options
Diffstat (limited to 'src/3rdparty/zlib/src/deflate.h')
| -rw-r--r-- | src/3rdparty/zlib/src/deflate.h | 55 |
1 files changed, 43 insertions, 12 deletions
diff --git a/src/3rdparty/zlib/src/deflate.h b/src/3rdparty/zlib/src/deflate.h index 17c226113b..300c6ada62 100644 --- a/src/3rdparty/zlib/src/deflate.h +++ b/src/3rdparty/zlib/src/deflate.h @@ -1,5 +1,5 @@ /* deflate.h -- internal compression state - * Copyright (C) 1995-2018 Jean-loup Gailly + * Copyright (C) 1995-2024 Jean-loup Gailly * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -23,6 +23,10 @@ # define GZIP #endif +/* define LIT_MEM to slightly increase the speed of deflate (order 1% to 2%) at + the cost of a larger memory footprint */ +/* #define LIT_MEM */ + /* =========================================================================== * Internal compression state. */ @@ -217,7 +221,14 @@ typedef struct internal_state { /* Depth of each subtree used as tie breaker for trees of equal frequency */ +#ifdef LIT_MEM +# define LIT_BUFS 5 + ushf *d_buf; /* buffer for distances */ + uchf *l_buf; /* buffer for literals/lengths */ +#else +# define LIT_BUFS 4 uchf *sym_buf; /* buffer for distances and literals/lengths */ +#endif uInt lit_bufsize; /* Size of match buffer for literals/lengths. There are 4 reasons for @@ -239,7 +250,7 @@ typedef struct internal_state { * - I can't count above 4 */ - uInt sym_next; /* running index in sym_buf */ + uInt sym_next; /* running index in symbol buffer */ uInt sym_end; /* symbol table full when sym_next reaches this */ ulg opt_len; /* bit length of current block with optimal trees */ @@ -291,14 +302,14 @@ typedef struct internal_state { memory checker errors from longest match routines */ /* in trees.c */ -void ZLIB_INTERNAL _tr_init OF((deflate_state *s)); -int ZLIB_INTERNAL _tr_tally OF((deflate_state *s, unsigned dist, unsigned lc)); -void ZLIB_INTERNAL _tr_flush_block OF((deflate_state *s, charf *buf, - ulg stored_len, int last)); -void ZLIB_INTERNAL _tr_flush_bits OF((deflate_state *s)); -void ZLIB_INTERNAL _tr_align OF((deflate_state *s)); -void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf, - ulg stored_len, int last)); +void ZLIB_INTERNAL _tr_init(deflate_state *s); +int ZLIB_INTERNAL _tr_tally(deflate_state *s, unsigned dist, unsigned lc); +void ZLIB_INTERNAL _tr_flush_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_stored_block(deflate_state *s, charf *buf, + ulg stored_len, int last); #define d_code(dist) \ ((dist) < 256 ? _dist_code[dist] : _dist_code[256+((dist)>>7)]) @@ -318,6 +329,25 @@ void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf, extern const uch ZLIB_INTERNAL _dist_code[]; #endif +#ifdef LIT_MEM +# define _tr_tally_lit(s, c, flush) \ + { uch cc = (c); \ + s->d_buf[s->sym_next] = 0; \ + s->l_buf[s->sym_next++] = cc; \ + s->dyn_ltree[cc].Freq++; \ + 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->sym_next] = dist; \ + s->l_buf[s->sym_next++] = len; \ + dist--; \ + s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \ + s->dyn_dtree[d_code(dist)].Freq++; \ + flush = (s->sym_next == s->sym_end); \ + } +#else # define _tr_tally_lit(s, c, flush) \ { uch cc = (c); \ s->sym_buf[s->sym_next++] = 0; \ @@ -329,14 +359,15 @@ void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf, # define _tr_tally_dist(s, distance, length, flush) \ { uch len = (uch)(length); \ ush dist = (ush)(distance); \ - s->sym_buf[s->sym_next++] = dist; \ - s->sym_buf[s->sym_next++] = dist >> 8; \ + s->sym_buf[s->sym_next++] = (uch)dist; \ + s->sym_buf[s->sym_next++] = (uch)(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->sym_next == s->sym_end); \ } +#endif #else # define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c) # define _tr_tally_dist(s, distance, length, flush) \ |