modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/builtins/strpcpy-2.c (about)

     1  /* Copyright (C) 2003  Free Software Foundation.
     2  
     3     Ensure that builtin stpcpy performs correctly.
     4  
     5     Written by Jakub Jelinek, 21/05/2003.  */
     6  
     7  extern void abort (void);
     8  typedef __SIZE_TYPE__ size_t;
     9  extern int memcmp (const void *, const void *, size_t);
    10  extern char *stpcpy (char *, const char *);
    11  extern int inside_main;
    12  
    13  long buf1[64];
    14  char *buf2 = (char *) (buf1 + 32);
    15  long buf5[20];
    16  char buf7[20];
    17  
    18  void
    19  __attribute__((noinline))
    20  test (long *buf3, char *buf4, char *buf6, int n)
    21  {
    22    int i = 4;
    23  
    24    if (stpcpy ((char *) buf3, "abcdefghijklmnop") != (char *) buf1 + 16
    25        || memcmp (buf1, "abcdefghijklmnop", 17))
    26      abort ();
    27  
    28    if (__builtin_stpcpy ((char *) buf3, "ABCDEFG") != (char *) buf1 + 7
    29        || memcmp (buf1, "ABCDEFG\0ijklmnop", 17))
    30      abort ();
    31  
    32    if (stpcpy ((char *) buf3 + i++, "x") != (char *) buf1 + 5
    33        || memcmp (buf1, "ABCDx\0G\0ijklmnop", 17))
    34      abort ();
    35  }
    36  
    37  void
    38  main_test (void)
    39  {
    40    /* All these tests are allowed to call mempcpy/stpcpy.  */
    41    inside_main = 0;
    42    __builtin_memcpy (buf5, "RSTUVWXYZ0123456789", 20);
    43    __builtin_memcpy (buf7, "RSTUVWXYZ0123456789", 20);
    44    test (buf1, buf2, "rstuvwxyz", 0);
    45  }