diff options
Diffstat (limited to 'zlib/contrib/infback9/inftree9.h')
| -rw-r--r-- | zlib/contrib/infback9/inftree9.h | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/zlib/contrib/infback9/inftree9.h b/zlib/contrib/infback9/inftree9.h index a268084ee..5ab21f0c6 100644 --- a/zlib/contrib/infback9/inftree9.h +++ b/zlib/contrib/infback9/inftree9.h @@ -1,5 +1,5 @@ /* inftree9.h -- header to use inftree9.c - * Copyright (C) 1995-2003 Mark Adler + * Copyright (C) 1995-2008 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -35,15 +35,21 @@ typedef struct { 01000000 - invalid code */ -/* Maximum size of dynamic tree. The maximum found in a long but non- - exhaustive search was 1444 code structures (852 for length/literals - and 592 for distances, the latter actually the result of an - exhaustive search). The true maximum is not known, but the value - below is more than safe. */ -#define ENOUGH 2048 -#define MAXD 592 +/* Maximum size of the dynamic table. The maximum number of code structures is + 1446, which is the sum of 852 for literal/length codes and 594 for distance + codes. These values were found by exhaustive searches using the program + examples/enough.c found in the zlib distribtution. The arguments to that + program are the number of symbols, the initial root table size, and the + maximum bit length of a code. "enough 286 9 15" for literal/length codes + returns returns 852, and "enough 32 6 15" for distance codes returns 594. + The initial root table size (9 or 6) is found in the fifth argument of the + inflate_table() calls in infback9.c. If the root table size is changed, + then these maximum sizes would be need to be recalculated and updated. */ +#define ENOUGH_LENS 852 +#define ENOUGH_DISTS 594 +#define ENOUGH (ENOUGH_LENS+ENOUGH_DISTS) -/* Type of code to build for inftable() */ +/* Type of code to build for inflate_table9() */ typedef enum { CODES, LENS, |