crc-32.h

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00001 #ifndef CRC32_H
00002 #define CRC32_H
00003 
00004 /* $Id: crc-32.h 114 2004-08-20 13:14:08Z poggij $ */
00005 /* Code stealth from jffs2 source */
00006 
00007 //#include <include.h>
00008 #define UINT32 unsigned long
00009 
00010 extern const UINT32 crc32_table[256];
00011 
00012 /* Return a 32-bit CRC of the contents of the buffer. */
00013 
00014 static inline UINT32 doFCS(const void *ss, int len)
00015 {
00016   const unsigned char *s = ss;
00017   UINT32 val = 0xffffffff;
00018 
00019   while (--len >= 0)
00020     val = crc32_table[(val ^ *s++) & 0xff] ^ (val >> 8);
00021   return val;
00022 }
00023 
00024 #endif

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