blog.c

来自「用socket写的802.1x程序代码」· C语言 代码 · 共 42 行

#include "blog.h"

//A transformation of one-byte-for-one-byte
unsigned char Alog(unsigned char BForAlog)
{
    int a=0,b=0,c=0,d=0,iRt;

    a=BForAlog;
    c=a;
    d=a;
    c&=0x40;
    b=a;
    d>>=2;
    c|=d;
    d=a;
    c>>=2;
    d&=0x20;
    c|=d;
    d=a;
    c>>=2;
    d&=0x10;
    c|=d;

    d=a;
    d&=2;
    b<<=2;
    d|=b;
    b=a;
    d<<=2;
    b&=4;
    a&=8;
    d|=b;
    d<<=2;
    d|=a;

    c>>=1;
    d<<=1;
    c|=d;
    iRt=(~c)&0xff;
    return iRt;
}