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| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 2011-03-18 10:11:29 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 2011-03-18 10:11:29 +0000 |
| commit | 6121dc77366dbc5b7fe28e6d405e498e79630c15 (patch) | |
| tree | da2e2000ca12b6e2c1c739f123d867b0f182c841 /cpukit/zlib/inftrees.h | |
| parent | This commit was generated by cvs2svn to compensate for changes in r25189, (diff) | |
| download | rtems-6121dc77366dbc5b7fe28e6d405e498e79630c15.tar.bz2 | |
2010-03-22 Joel Sherrill <joel.sherrill@oarcorp.com>
* ChangeLog.zlib, FAQ, Makefile.am, README, adler32.c, compress.c,
crc32.c, deflate.c, deflate.h, infback.c, inffast.c, inflate.c,
inflate.h, inftrees.c, inftrees.h, trees.c, uncompr.c, zconf.h,
zlib.3, zlib.h, zutil.c, zutil.h: Update to zlib 1.2.4.
* gzclose.c, gzguts.h, gzlib.c, gzread.c, gzwrite.c, doc/algorithm.txt:
New files.
* algorithm.txt, gzio.c: Removed.
Diffstat (limited to 'cpukit/zlib/inftrees.h')
| -rw-r--r-- | cpukit/zlib/inftrees.h | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/cpukit/zlib/inftrees.h b/cpukit/zlib/inftrees.h index b1104c87e7..67461da034 100644 --- a/cpukit/zlib/inftrees.h +++ b/cpukit/zlib/inftrees.h @@ -35,15 +35,22 @@ 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 + 1444, which is the sum of 852 for literal/length codes and 592 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 30 6 15" for distance codes returns 592. + The initial root table size (9 or 6) is found in the fifth argument of the + inflate_table() calls in inflate.c and infback.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 592 +#define ENOUGH (ENOUGH_LENS+ENOUGH_DISTS) -/* Type of code to build for inftable() */ +/* Type of code to build for inflate_table() */ typedef enum { CODES, LENS, |