1  /* Copyright (C) 2000  Free Software Foundation.
       2  
       3     Ensure all expected transformations of builtin strstr occur and
       4     perform correctly.
       5  
       6     Written by Kaveh R. Ghazi, 11/6/2000.  */
       7  
       8  extern void abort(void);
       9  extern char *strstr (const char *, const char *);
      10  
      11  void
      12  main_test (void)
      13  {
      14    const char *const foo = "hello world";
      15    
      16    if (strstr (foo, "") != foo)
      17      abort();
      18    if (strstr (foo + 4, "") != foo + 4)
      19      abort();
      20    if (strstr (foo, "h") != foo)
      21      abort();
      22    if (strstr (foo, "w") != foo + 6)
      23      abort();
      24    if (strstr (foo + 6, "o") != foo + 7)
      25      abort();
      26    if (strstr (foo + 1, "world") != foo + 6)
      27      abort();
      28  
      29    /* Test at least one instance of the __builtin_ style.  We do this
      30       to ensure that it works and that the prototype is correct.  */
      31    if (__builtin_strstr (foo + 1, "world") != foo + 6)
      32      abort();
      33  }