cryptoprimitives.h

传感器网络中的嵌入式操作系统源代码

// $Id: CryptoPrimitives.h,v 1.1.10.3 2003/08/26 09:08:16 cssharp Exp $

/*									tab:4
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 * Copyright (c) 2002-2003 Intel Corporation
 * All rights reserved.
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/* Authors: Naveen Sastry
 * Date:    10/24/02
 */

/**
 * @author Naveen Sastry
 */


#define rol32(a, n) ( a = (((a) << (n)) | ((a) >> (32-(n)))))
#define ror32(a, n) ( a = (((a) >> (n)) | ((a) << (32-(n)))))
#define fastrol32 rol32
#define fastror32 ror32

// convert a 4byte char array to a unsigned long
// [assumes least significant byte of char array is first]
#define c2l(c,l)	(l =((unsigned long)(*((c)))),              \
			 l|=((unsigned long)(*((c+1))))<< 8L,       \
			 l|=((unsigned long)(*((c+2))))<<16L,       \
			 l|=((unsigned long)(*((c+3))))<<24L)
// convert an unsigned long to a 4 byte char array
// [assumes least significant byte of char array is first]
#define l2c(l,c)	(*((c))  =(unsigned char)(((l)     )&0xff), \
			 *((c+1))=(unsigned char)(((l)>> 8L)&0xff), \
			 *((c+2))=(unsigned char)(((l)>>16L)&0xff), \
			 *((c+3))=(unsigned char)(((l)>>24L)&0xff))

// convert a 2 byte char array to an unsigned short:
// [assumes MOST significant byte is first]
#define c2sM(c, s)       (s = ((unsigned short)(*((c))))  <<8L ,             \
                          s|= ((unsigned short)(*((c+1)))))

// convert a unsigned short to a 2 byte char array
// [assumes MOST significant byte is first]
#define s2cM(s, c)      (*((c))   = (unsigned short)(((s) >> 8L)&0xff), \
                         *((c+1)) = (unsigned short)(((s)      ) &0xff))