modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/builtins/strcpy.c (about)

     1  /* Copyright (C) 2000  Free Software Foundation.
     2  
     3     Ensure builtin memcpy and strcpy perform correctly.
     4  
     5     Written by Jakub Jelinek, 11/24/2000.  */
     6  
     7  extern void abort (void);
     8  extern char *strcpy (char *, const char *);
     9  typedef __SIZE_TYPE__ size_t;
    10  extern void *memcpy (void *, const void *, size_t);
    11  extern int memcmp (const void *, const void *, size_t);
    12  
    13  char p[32] = "";
    14  
    15  void
    16  main_test (void)
    17  {
    18    if (strcpy (p, "abcde") != p || memcmp (p, "abcde", 6))
    19      abort ();
    20    if (strcpy (p + 16, "vwxyz" + 1) != p + 16 || memcmp (p + 16, "wxyz", 5))
    21      abort ();
    22    if (strcpy (p + 1, "") != p + 1 || memcmp (p, "a\0cde", 6))
    23      abort ();  
    24    if (strcpy (p + 3, "fghij") != p + 3 || memcmp (p, "a\0cfghij", 9))
    25      abort ();
    26    if (memcpy (p, "ABCDE", 6) != p || memcmp (p, "ABCDE", 6))
    27      abort ();
    28    if (memcpy (p + 16, "VWX" + 1, 2) != p + 16 || memcmp (p + 16, "WXyz", 5))
    29      abort ();
    30    if (memcpy (p + 1, "", 1) != p + 1 || memcmp (p, "A\0CDE", 6))
    31      abort ();  
    32    if (memcpy (p + 3, "FGHI", 4) != p + 3 || memcmp (p, "A\0CFGHIj", 9))
    33      abort ();
    34  
    35    /* Test at least one instance of the __builtin_ style.  We do this
    36       to ensure that it works and that the prototype is correct.  */
    37    if (__builtin_strcpy (p, "abcde") != p || memcmp (p, "abcde", 6))
    38      abort ();
    39    if (__builtin_memcpy (p, "ABCDE", 6) != p || memcmp (p, "ABCDE", 6))
    40      abort ();
    41  }