case_lowerb.c

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