#include "case.h"

void case_lowerb(s,len)
char *s;
unsigned int len;
{
 unsigned char x;
 while (len > 0)
  {
   --len;
   x = *s - 'A';
   if (x <= 'Z' - 'A')
     *s = x + 'a';
   ++s;
  }
}