1 /* Copyright (C) 2002  Free Software Foundation.
2 
3    Test strlen with various combinations of pointer alignments and lengths to
4    make sure any optimizations in the library are correct.
5 
6    Written by Michael Meissner, March 9, 2002.  */
7 
8 #include <string.h>
9 #include <stddef.h>
10 
11 #ifndef MAX_OFFSET
12 #define MAX_OFFSET (sizeof (long long))
13 #endif
14 
15 #ifndef MAX_TEST
16 #define MAX_TEST (8 * sizeof (long long))
17 #endif
18 
19 #ifndef MAX_EXTRA
20 #define MAX_EXTRA (sizeof (long long))
21 #endif
22 
23 #define MAX_LENGTH (MAX_OFFSET + MAX_TEST + MAX_EXTRA + 1)
24 
25 static union {
26   char buf[MAX_LENGTH];
27   long long align_int;
28   long double align_fp;
29 } u;
30 
31 main ()
32 {
33   size_t off, len, len2, i;
34   char *p;
35 
36   for (off = 0; off < MAX_OFFSET; off++)
37     for (len = 0; len < MAX_TEST; len++)
38       {
39 	p = u.buf;
40 	for (i = 0; i < off; i++)
41 	  *p++ = '\0';
42 
43 	for (i = 0; i < len; i++)
44 	  *p++ = 'a';
45 
46 	*p++ = '\0';
47 	for (i = 0; i < MAX_EXTRA; i++)
48 	  *p++ = 'b';
49 
50 	p = u.buf + off;
51 	len2 = strlen (p);
52 	if (len != len2)
53 	  abort ();
54       }
55 
56   exit (0);
57 }
58