libio/dbz/case.h

   1 extern int cistrncmp();
   2 extern char *rfc822ize();
   3
   4 extern char casemap[];
   5
   6 /* must call cistrncmp before invoking TOLOW... */
   7 #define TOLOW(c)        (casemap[(c)+128])      /* see case.c for why 128 */
   8
   9 /* ...but the use of it in CISTREQN is safe without the preliminary call (!) */
  10 /* CISTREQN is an optimised case-insensitive strncmp(a,b,n)==0; n > 0 */
  11 #define CISTREQN(a, b, n) \
  12         (TOLOW((a)[0]) == TOLOW((b)[0]) && cistrncmp(a, b, n) == 0)