1  /* Copyright (C) 2000, 2003  Free Software Foundation.
       2  
       3     Ensure all expected transformations of builtin strchr and index
       4     occur and perform correctly.
       5  
       6     Written by Jakub Jelinek, 11/7/2000.  */
       7  
       8  extern void abort (void);
       9  extern char *strchr (const char *, int);
      10  extern char *index (const char *, int);
      11  
      12  void
      13  main_test (void)
      14  {
      15    const char *const foo = "hello world";
      16  
      17    if (strchr (foo, 'x'))
      18      abort ();
      19    if (strchr (foo, 'o') != foo + 4)
      20      abort ();
      21    if (strchr (foo + 5, 'o') != foo + 7)
      22      abort ();
      23    if (strchr (foo, '\0')  != foo + 11)
      24      abort ();
      25    /* Test only one instance of index since the code path is the same
      26       as that of strchr. */
      27    if (index ("hello", 'z')  != 0)
      28      abort ();
      29  
      30    /* Test at least one instance of the __builtin_ style.  We do this
      31       to ensure that it works and that the prototype is correct.  */
      32    if (__builtin_strchr (foo, 'o')  != foo + 4)
      33      abort ();
      34    if (__builtin_index (foo, 'o')  != foo + 4)
      35      abort ();
      36  }