gcc/testsuite/gcc.c-torture/execute/builtins/string-1.c

   1 /* Copyright (C) 2000, 2003  Free Software Foundation.
   2
   3    Ensure all expected transformations of builtin strlen, strcmp,
   4    strrchr and rindex occur and perform correctly.
   5
   6    Written by Jakub Jelinek, 11/7/2000.  */
   7
   8 extern void abort (void);
   9 extern __SIZE_TYPE__ strlen (const char *);
  10 extern int strcmp (const char *, const char *);
  11 extern char *strrchr (const char *, int);
  12 extern char *rindex (const char *, int);
  13
  14 int x = 6;
  15 char *bar = "hi world";
  16
  17 void
  18 main_test (void)
  19 {
  20   const char *const foo = "hello world";
  21
  22   if (strlen (foo) != 11)
  23     abort ();
  24   if (strlen (foo + 4) != 7)
  25     abort ();
  26   if (strlen (foo + (x++ & 7)) != 5)
  27     abort ();
  28   if (x != 7)
  29     abort ();
  30   if (strcmp (foo, "hello") <= 0)
  31     abort ();
  32   if (strcmp (foo + 2, "llo") <= 0)
  33     abort ();
  34   if (strcmp (foo, foo) != 0)
  35     abort ();
  36   if (strcmp (foo, "hello world ") >= 0)
  37     abort ();
  38   if (strcmp (foo + 10, "dx") >= 0)
  39     abort ();
  40   if (strcmp (10 + foo, "dx") >= 0)
  41     abort ();
  42   if (strcmp (bar, "") <= 0)
  43     abort ();
  44   if (strcmp ("", bar) >= 0)
  45     abort ();
  46   if (strcmp (bar+8, "") != 0)
  47     abort ();
  48   if (strcmp ("", bar+8) != 0)
  49     abort ();
  50   if (strcmp (bar+(--x), "") <= 0 || x != 6)
  51     abort ();
  52   if (strcmp ("", bar+(++x)) >= 0 || x != 7)
  53     abort ();
  54   if (strrchr (foo, 'x'))
  55     abort ();
  56   if (strrchr (foo, 'o') != foo + 7)
  57     abort ();
  58   if (strrchr (foo, 'e') != foo + 1)
  59     abort ();
  60   if (strrchr (foo + 3, 'e'))
  61     abort ();
  62   if (strrchr (foo, '\0') != foo + 11)
  63     abort ();
  64   if (strrchr (bar, '\0') != bar + 8)
  65     abort ();
  66   if (strrchr (bar + 4, '\0') != bar + 8)
  67     abort ();
  68   if (strrchr (bar + (x++ & 3), '\0') != bar + 8)
  69     abort ();
  70   if (x != 8)
  71     abort ();
  72   /* Test only one instance of rindex since the code path is the same
  73      as that of strrchr. */
  74   if (rindex ("hello", 'z') != 0)
  75     abort ();
  76
  77   /* Test at least one instance of the __builtin_ style.  We do this
  78      to ensure that it works and that the prototype is correct.  */
  79   if (__builtin_rindex (foo, 'o') != foo + 7)
  80     abort ();
  81   if (__builtin_strrchr (foo, 'o') != foo + 7)
  82     abort ();
  83   if (__builtin_strlen (foo) != 11)
  84     abort ();
  85   if (__builtin_strcmp (foo, "hello") <= 0)
  86     abort ();
  87 }