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  1. /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
  2. #include <string.h>
  3. #include <libc/unconst.h>
  4.  
  5. char *
  6. strpbrk(const char *s1, const char *s2)
  7. {
  8.   const char *scanp;
  9.   int c, sc;
  10.  
  11.   while ((c = *s1++) != 0)
  12.   {
  13.     for (scanp = s2; (sc = *scanp++) != 0;)
  14.       if (sc == c)
  15.         return unconst(s1 - 1, char *);
  16.   }
  17.   return 0;
  18. }
  19.