1#include "case.h"
 2
 3void case_lowerb(s,len)
 4char *s;
 5unsigned int len;
 6{
 7  unsigned char x;
 8  while (len > 0) {
 9    --len;
10    x = *s - 'A';
11    if (x <= 'Z' - 'A') *s = x + 'a';
12    ++s;
13  }
14}