/*?adler32.c?--?compute?the?Adler-32?checksum?of?a?data?stream
?*?Copyright?（C）?1995-2007?Mark?Adler
?*?For?conditions?of?distribution?and?use?see?copyright?notice?in?zlib.h
?*/

/*?@（#）?$Id$?*/

#include?“zutil.h“

#define?local?static

local?uLong?adler32_combine_（uLong?adler1?uLong?adler2?z_off64_t?len2）;

#define?base?65521UL????/*?largest?prime?smaller?than?65536?*/
#define?NMAX?5552
/*?NMAX?is?the?largest?n?such?that?255n（n+1）/2?+?（n+1）（base-1）?<=?2^32-1?*/

#define?DO1（bufi）??{adler?+=?（buf）[i];?sum2?+=?adler;}
#define?DO2（bufi）??DO1（bufi）;?DO1（bufi+1）;
#define?DO4（bufi）??DO2（bufi）;?DO2（bufi+2）;
#define?DO8（bufi）??DO4（bufi）;?DO4（bufi+4）;
#define?DO16（buf）???DO8（buf0）;?DO8（buf8）;

/*?use?NO_DIVIDE?if?your?processor?does?not?do?division?in?hardware?*/
#ifdef?NO_DIVIDE
#??define?MOD（a）?\
????do?{?\
????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?base）?a?-=?base;?\
????}?while?（0）
#??define?MOD4（a）?\
????do?{?\
????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?（base?<se?<????????if?（a?>=?base）?a?-=?base;?\
????}?while?（0）
#else
#??define?MOD（a）?a?%=?base
#??define?MOD4（a）?a?%=?base
#endif

/*?=========================================================================?*/
uLong?ZEXPORT?adler32（adler?buf?len）
????uLong?adler;
????const?Bytef?*buf;
????uInt?len;
{
????unsigned?long?sum2;
????unsigned?n;

????/*?split?Adler-32?into?component?sums?*/
????sum2?=?（adler?>>?16）?&?0xffff;
????adler?&=?0xffff;

????/*?in?case?user?likes?doing?a?byte?at?a?time?keep?it?fast?*/
????if?（len?==?1）?{
????????adler?+=?buf[0];
????????if?（adler?>=?base）
????????????adler?-=?base;
????????sum2?+=?adler;
????????if?（sum2?>=?base）
????????????sum2?-=?base;
????????return?adler?|?（sum2?<????}

????/*?initial?Adler-32?value?（deferred?check?for?len?==?1?speed）?*/
????if?（buf?==?Z_NULL）
????????return?1L;

????/*?in?case?short?lengths?are?provided?keep?it?somewhat?fast?*/
????if?（len?????????while?（len--）?{
????????????adler?+=?*buf++;
????????????sum2?+=?adler;
????????}
????????if?（adler?>=?base）
????????????adler?-=?base;
????????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2016-08-08?11:38??ziplib\
?????文件????????5048??2007-08-06?14:16??ziplib\adler32.c
?????文件????????2520??2005-12-12?02:27??ziplib\compress.c
?????文件???????13681??2010-04-19?12:10??ziplib\crc32.c
?????文件???????30568??2003-01-06?00:53??ziplib\crc32.h
?????文件????????4759??2009-10-26?13:49??ziplib\crypt.h
?????文件???????67992??2010-04-20?12:12??ziplib\deflate.c
?????文件???????12672??2010-04-19?12:00??ziplib\deflate.h
?????文件?????????678??2010-02-14?08:12??ziplib\gzclose.c
?????文件????????4677??2010-04-19?03:28??ziplib\gzguts.h
?????文件???????14071??2010-04-19?01:53??ziplib\gzlib.c
?????文件???????20574??2010-03-28?23:19??ziplib\gzread.c
?????文件???????14602??2010-03-13?10:27??ziplib\gzwrite.c
?????文件???????22622??2009-12-26?08:34??ziplib\infback.c
?????文件???????13439??2010-04-19?12:16??ziplib\inffast.c
?????文件?????????427??2010-04-19?12:16??ziplib\inffast.h
?????文件????????6343??2002-11-25?07:44??ziplib\inffixed.h
?????文件???????52623??2010-01-24?16:27??ziplib\inflate.c
?????文件????????6399??2009-12-26?08:32??ziplib\inflate.h
?????文件???????13769??2010-04-20?12:12??ziplib\inftrees.c
?????文件????????2928??2010-04-19?12:15??ziplib\inftrees.h
?????文件????????7651??2010-01-05?01:31??ziplib\ioapi.c
?????文件????????6837??2010-02-15?19:59??ziplib\ioapi.h
?????文件???????11903??2010-02-15?19:58??ziplib\iowin32.c
?????文件?????????851??2010-02-15?19:58??ziplib\iowin32.h
?????文件????????7859??2010-01-02?13:46??ziplib\mztools.c
?????文件?????????677??2005-07-13?18:08??ziplib\mztools.h
?????文件????????1147??2016-08-03?11:04??ziplib\ReadMe.txt
?????文件???????45242??2010-04-19?12:03??ziplib\trees.c
?????文件????????8472??2010-04-19?01:32??ziplib\trees.h
?????文件????????1994??2010-01-18?01:34??ziplib\uncompr.c
............此處省略10個文件信息