text: #include "stdinc.h"
  #include "dat.h"
  #include "fns.h"
  
  u8int zeroscore[VtScoreSize];
  
  /* Call this function to force linking of score.o for zeroscore on OS X */
  void needzeroscore(void) { }
  
  void
  scoremem(u8int *score, u8int *buf, int n)
  {
  	DigestState s;
  
  	memset(&s, 0, sizeof s);
  	sha1(buf, n, score, &s);
  }
  
  static int
  hexv(int c)
  {
  	if(c >= '0' && c <= '9')
  		return c - '0';
  	if(c >= 'a' && c <= 'f')
  		return c - 'a' + 10;
  	if(c >= 'A' && c <= 'F')
  		return c - 'A' + 10;
  	return -1;
  }
  
  int
  strscore(char *s, u8int *score)
  {
  	int i, c, d;
  
  	for(i = 0; i < VtScoreSize; i++){
  		c = hexv(s[2 * i]);
  		if(c < 0)
  			return -1;
  		d = hexv(s[2 * i + 1]);
  		if(d < 0)
  			return -1;
  		score[i] = (c << 4) + d;
  	}
  	return s[2 * i] == '\0';
  }
  