Amylaars driver.
*/
INLINE int
whashstr P2(char *, s, int, maxn)
{
    register unsigned char oh, h;
    register unsigned char *p;
    register int i;
      if(!s)return 0;
    if (!*s)
              return 0;
    p = (unsigned char *) s;
    oh = T[*p];
    h = (*(p++) + 1) & 0xff;
    for (i = maxn - 1; *p && --i >= 0; ) {
              oh = T[oh ^ *p];
              h = T[h ^ *(p++)];
    }
    return (oh << 8) + h;
}
注释中说明这两个函数基于Pearson发表的一篇 文章，这篇文章发表于Communications of the ACM archive Volume 33,  Issue 6 (June 1990)，文章题目是: Fast hashing of  variable-length text strings。whashstr函数取自于Amylaars driver——另一个mud driver？ 这个函数比第一个函数hashstr速度要快一点，因此在MudOS中 全部采用whashstr函数来实现散列表。
我并没有找到Pearson的那篇文章，对于数组T[]的产生也就无从得知，在查找资料（参 考资料3）时找到另一个产生的T的算法和一个散列函数：
  -- use an array of 256 1-byte values
  ub1 x[0..255];
  -- fill it with the values 0 to 255 in some  pseudorandom order
  -- (this is derived from the alleged RC4)
  { for i in 0..255 do
    { x[i] := i;
    }
  }
  k=7;
  { for j in 0..3 do
    { for i in 0..255 do
      { s = x[i];
        k = (k + s) mod 256;
        x[i] = x[k];
        x[k] = s;
      }
    }
  }
  -- use the length of the message to initialize the  hash
  -- XXX can be 0, or some constant, or some argument
  hash := (XXX+len) mod 256;
  -- hash the characters in the message one byte at a  time
  {for i in 0..len-1 do
{hash := (hash +  message[i]) mod 256;  hash := x[hash];}}
将生成T的算法写成c函数：
void gen_T(int* vec)
{
      int i, j, s, k = 7;
      for (i = 0; i < 256; ++i)
      {
              vec[i] = i;
      }
      for (j = 0; j < 4; ++j)
      {
              for (i = 0; i < 256; ++i)
              {
                    s = vec[i];
                    k = (k + s) % 256;
                    vec[i] = vec[k];
                    vec[k] = s;
              }
      }
}
于是，我们有 了另一个散列函数：
static int simulate_T[] =
{
        49,118,63,252,13,155,114,130,137,40,210,62,219,246,136,221,
        174,106,37,227,166,25,139,19,204,212,64,176,70,11,170,58,
        146,24,123,77,184,248,108,251,43,171,12,141,126,41,95,142,
        167,46,178,235,30,75,45,208,110,230,226,50,32,112,156,180,
        205,68,202,203,82,7,247,217,223,71,116,76,6,31,194,183,
        15,102,97,215,234,240,53,119,52,47,179,99,199,8,101,35,
        65,132,154,239,148,51,216,74,93,192,42,86,165,113,89,48,
        100,195,29,211,169,38,57,214,127,117,59,39,209,88,1,134,
        92,163,0,66,237,22,164,200,85,9,190,129,111,172,231,14,
        181,206,128,23,187,73,149,193,241,236,197,159,55,125,196,60,
        161,238,245,94,87,157,122,158,115,207,17,20,145,232,107,16,
        21,185,33,225,175,253,81,182,67,243,69,220,153,5,143,3,
        26,213,147,222,105,188,229,191,72,177,250,135,152,121,218,44,