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
main_test(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 }
83