gcc/testsuite/gcc.c-torture/execute/builtins/strncat.c

   1 /* Copyright (C) 2000, 2003  Free Software Foundation.
   2
   3    Ensure all expected transformations of builtin strncat occur and
   4    perform correctly.
   5
   6    Written by Kaveh R. Ghazi, 11/27/2000.  */
   7
   8 extern void abort (void);
   9 typedef __SIZE_TYPE__ size_t;
  10 extern char *strncat (char *, const char *, size_t);
  11 extern char *strcpy (char *, const char *);
  12 extern void *memset (void *, int, size_t);
  13 extern int memcmp (const void *, const void *, size_t);
  14 int x = 123;
  15
  16 /* Reset the destination buffer to a known state. */
  17 #define RESET_DST_WITH(FILLER) \
  18   do { memset (dst, 'X', sizeof (dst)); strcpy (dst, (FILLER)); } while (0)
  19
  20 void
  21 main_test (void)
  22 {
  23   const char *const s1 = "hello world";
  24   const char *const s2 = "";
  25   char dst[64], *d2;
  26
  27   RESET_DST_WITH (s1);
  28   if (strncat (dst, "", 100) != dst || memcmp (dst, "hello world\0XXX", 15))
  29     abort();
  30   RESET_DST_WITH (s1);
  31   if (strncat (dst, s2, 100) != dst || memcmp (dst, "hello world\0XXX", 15))
  32     abort();
  33   RESET_DST_WITH (s1); d2 = dst;
  34   if (strncat (++d2, s2, 100) != dst+1 || d2 != dst+1
  35       || memcmp (dst, "hello world\0XXX", 15))
  36     abort();
  37   RESET_DST_WITH (s1); d2 = dst;
  38   if (strncat (++d2+5, s2, 100) != dst+6 || d2 != dst+1
  39       || memcmp (dst, "hello world\0XXX", 15))
  40     abort();
  41   RESET_DST_WITH (s1); d2 = dst;
  42   if (strncat (++d2+5, s1+11, 100) != dst+6 || d2 != dst+1
  43       || memcmp (dst, "hello world\0XXX", 15))
  44     abort();
  45   RESET_DST_WITH (s1); d2 = dst;
  46   if (strncat (++d2+5, s1, 0) != dst+6 || d2 != dst+1
  47       || memcmp (dst, "hello world\0XXX", 15))
  48     abort();
  49   RESET_DST_WITH (s1); d2 = dst;
  50   if (strncat (++d2+5, "", ++x) != dst+6 || d2 != dst+1 || x != 124
  51       || memcmp (dst, "hello world\0XXX", 15))
  52     abort();
  53
  54   RESET_DST_WITH (s1);
  55   if (strncat (dst, "foo", 3) != dst || memcmp (dst, "hello worldfoo\0XXX", 18))
  56     abort();
  57   RESET_DST_WITH (s1);
  58   if (strncat (dst, "foo", 100) != dst || memcmp (dst, "hello worldfoo\0XXX", 18))
  59     abort();
  60   RESET_DST_WITH (s1);
  61   if (strncat (dst, s1, 100) != dst || memcmp (dst, "hello worldhello world\0XXX", 26))
  62     abort();
  63   RESET_DST_WITH (s1); d2 = dst;
  64   if (strncat (++d2, s1, 100) != dst+1 || d2 != dst+1
  65       || memcmp (dst, "hello worldhello world\0XXX", 26))
  66     abort();
  67   RESET_DST_WITH (s1); d2 = dst;
  68   if (strncat (++d2+5, s1, 100) != dst+6 || d2 != dst+1
  69       || memcmp (dst, "hello worldhello world\0XXX", 26))
  70     abort();
  71   RESET_DST_WITH (s1); d2 = dst;
  72   if (strncat (++d2+5, s1+5, 100) != dst+6 || d2 != dst+1
  73       || memcmp (dst, "hello world world\0XXX", 21))
  74     abort();
  75
  76   /* Test at least one instance of the __builtin_ style.  We do this
  77      to ensure that it works and that the prototype is correct.  */
  78   RESET_DST_WITH (s1);
  79   if (__builtin_strncat (dst, "", 100) != dst
  80       || memcmp (dst, "hello world\0XXX", 15))
  81     abort();
  82 }