gnu/dist/gcc4/gcc/testsuite/gcc.c-torture/execute/string-opt-5.c

   1 /* Copyright (C) 2000  Free Software Foundation.
   2
   3    Ensure builtin strlen, strcmp, strchr, strrchr and strncpy
   4    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 *strchr (const char *, int);
  12 extern char *strrchr (const char *, int);
  13 extern char *strncpy (char *, const char *, __SIZE_TYPE__);
  14 extern void *memset (void *, int, __SIZE_TYPE__);
  15 extern int memcmp (const void *, const void *, __SIZE_TYPE__);
  16
  17 int x = 6;
  18 int y = 1;
  19 char *bar = "hi world";
  20 char buf [64];
  21
  22 int main()
  23 {
  24   const char *const foo = "hello world";
  25   char dst [64];
  26
  27   if (strlen (bar) != 8)
  28     abort ();
  29   if (strlen (bar + (++x & 2)) != 6)
  30     abort ();
  31   if (x != 7)
  32     abort ();
  33   if (strlen (foo + (x++, 6)) != 5)
  34     abort ();
  35   if (x != 8)
  36     abort ();
  37   if (strlen (foo + (++x & 1)) != 10)
  38     abort ();
  39   if (x != 9)
  40     abort ();
  41   if (strcmp (foo + (x -= 6), "lo world"))
  42     abort ();
  43   if (x != 3)
  44     abort ();
  45   if (strcmp (foo, bar) >= 0)
  46     abort ();
  47   if (strcmp (foo, bar + (x++ & 1)) >= 0)
  48     abort ();
  49   if (x != 4)
  50     abort ();
  51   if (strchr (foo + (x++ & 7), 'l') != foo + 9)
  52     abort ();
  53   if (x != 5)
  54     abort ();
  55   if (strchr (bar, 'o') != bar + 4)
  56     abort ();
  57   if (strchr (bar, '\0')  != bar + 8)
  58     abort ();
  59   if (strrchr (bar, 'x'))
  60     abort ();
  61   if (strrchr (bar, 'o') != bar + 4)
  62     abort ();
  63   if (strcmp (foo + (x++ & 1), "ello world" + (--y & 1)))
  64     abort ();
  65   if (x != 6 || y != 0)
  66     abort ();
  67   dst[5] = ' ';
  68   dst[6] = '\0';
  69   x = 5;
  70   y = 1;
  71   if (strncpy (dst + 1, foo + (x++ & 3), 4) != dst + 1
  72       || x != 6
  73       || strcmp (dst + 1, "ello "))
  74     abort ();
  75   memset (dst, ' ', sizeof dst);
  76   if (strncpy (dst + (++x & 1), (y++ & 3) + "foo", 10) != dst + 1
  77       || x != 7
  78       || y != 2
  79       || memcmp (dst, " oo\0\0\0\0\0\0\0\0 ", 12))
  80     abort ();
  81   memset (dst, ' ', sizeof dst);
  82   if (strncpy (dst, "hello", 8) != dst || memcmp (dst, "hello\0\0\0 ", 9))
  83     abort ();
  84   x = '!';
  85   memset (buf, ' ', sizeof buf);
  86   if (memset (buf, x++, ++y) != buf
  87       || x != '!' + 1
  88       || y != 3
  89       || memcmp (buf, "!!!", 3))
  90     abort ();
  91   if (memset (buf + y++, '-', 8) != buf + 3
  92       || y != 4
  93       || memcmp (buf, "!!!--------", 11))
  94     abort ();
  95   x = 10;
  96   if (memset (buf + ++x, 0, y++) != buf + 11
  97       || x != 11
  98       || y != 5
  99       || memcmp (buf + 8, "---\0\0\0", 7))
 100     abort ();
 101   if (memset (buf + (x += 4), 0, 6) != buf + 15
 102       || x != 15
 103       || memcmp (buf + 10, "-\0\0\0\0\0\0\0\0\0", 11))
 104     abort ();
 105
 106   return 0;
 107 }