crc.h

来自「加密硬盘、分区、虚拟盘的程序源码」· C头文件 代码 · 共 11 行

/* Copyright (C) 2004 TrueCrypt Team, truecrypt.org
   This product uses components written by Paul Le Roux <[e-mail]> */

extern unsigned long crc_32_tab[];

#define UPDC32(octet, crc)\
  (unsigned long)((crc_32_tab[(((unsigned long)(crc)) ^ ((unsigned char)(octet))) & 0xff] ^ (((unsigned long)(crc)) >> 8)))

unsigned long crc32 (unsigned char *data, int length);
unsigned long crc32long (unsigned long *data);
int crc32_selftest (void);