1  /* Copyright (C) 2000, 2001  Free Software Foundation.
       2  
       3     Ensure all expected transformations of builtin fputs occur and that
       4     we honor side effects in the stream argument.
       5  
       6     Written by Kaveh R. Ghazi, 10/30/2000.  */
       7  
       8  #include <stdio.h>
       9  extern void abort(void);
      10  
      11  int i;
      12  
      13  void
      14  main_test(void)
      15  {
      16    FILE *s_array[] = {stdout, NULL}, **s_ptr = s_array;
      17    const char *const s1 = "hello world";
      18    
      19    fputs ("", *s_ptr);
      20    fputs ("\n", *s_ptr);
      21    fputs ("bye", *s_ptr);
      22    fputs (s1, *s_ptr);
      23    fputs (s1+5, *s_ptr);
      24    fputs (s1+10, *s_ptr);
      25    fputs (s1+11, *s_ptr);
      26    
      27    /* Check side-effects when transforming fputs -> NOP.  */
      28    fputs ("", *s_ptr++);
      29    if (s_ptr != s_array+1 || *s_ptr != 0)
      30      abort();
      31  
      32    /* Check side-effects when transforming fputs -> fputc.  */
      33    s_ptr = s_array;
      34    fputs ("\n", *s_ptr++);
      35    if (s_ptr != s_array+1 || *s_ptr != 0)
      36      abort();
      37  
      38    /* Check side-effects when transforming fputs -> fwrite.  */
      39    s_ptr = s_array;
      40    fputs ("hello\n", *s_ptr++);
      41    if (s_ptr != s_array+1 || *s_ptr != 0)
      42      abort();
      43  
      44    /* Test at least one instance of the __builtin_ style.  We do this
      45       to ensure that it works and that the prototype is correct.  */
      46    s_ptr = s_array;
      47    __builtin_fputs ("", *s_ptr);
      48    /* These builtin stubs are called by __builtin_fputs, ensure their
      49       prototypes are set correctly too.  */
      50    __builtin_fputc ('\n', *s_ptr);
      51    __builtin_fwrite ("hello\n", 1, 6, *s_ptr);
      52    /* Check the unlocked style, these evaluate to nothing to avoid
      53       problems on systems without the unlocked functions.  */
      54    fputs_unlocked ("", *s_ptr);
      55    __builtin_fputs_unlocked ("", *s_ptr);
      56  
      57    /* Check side-effects in conditional expression.  */
      58    s_ptr = s_array;
      59    fputs (i++ ? "f" : "x", *s_ptr++);
      60    if (s_ptr != s_array+1 || *s_ptr != 0 || i != 1)
      61      abort();
      62    fputs (--i ? "\n" : "\n", *--s_ptr);
      63    if (s_ptr != s_array || i != 0)
      64      abort();
      65  }