]>
git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - lib/test-string_helpers.c
2 * Test cases for lib/string_helpers.c module.
4 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
6 #include <linux/init.h>
7 #include <linux/kernel.h>
8 #include <linux/module.h>
9 #include <linux/random.h>
10 #include <linux/string.h>
11 #include <linux/string_helpers.h>
19 static const struct test_string strings
[] __initconst
= {
21 .in
= "\\f\\ \\n\\r\\t\\v",
22 .out
= "\f\\ \n\r\t\v",
23 .flags
= UNESCAPE_SPACE
,
26 .in
= "\\40\\1\\387\\0064\\05\\040\\8a\\110\\777",
27 .out
= " \001\00387\0064\005 \\8aH?7",
28 .flags
= UNESCAPE_OCTAL
,
31 .in
= "\\xv\\xa\\x2c\\xD\\x6f2",
33 .flags
= UNESCAPE_HEX
,
36 .in
= "\\h\\\\\\\"\\a\\e\\",
37 .out
= "\\h\\\"\a\e\\",
38 .flags
= UNESCAPE_SPECIAL
,
42 static void __init
test_string_unescape(unsigned int flags
, bool inplace
)
47 int i
, p
= 0, q_test
= 0, q_real
= sizeof(out_real
);
49 for (i
= 0; i
< ARRAY_SIZE(strings
); i
++) {
50 const char *s
= strings
[i
].in
;
51 int len
= strlen(strings
[i
].in
);
53 /* Copy string to in buffer */
54 memcpy(&in
[p
], s
, len
);
57 /* Copy expected result for given flags */
58 if (flags
& strings
[i
].flags
) {
60 len
= strlen(strings
[i
].out
);
62 memcpy(&out_test
[q_test
], s
, len
);
67 /* Call string_unescape and compare result */
69 memcpy(out_real
, in
, p
);
70 if (flags
== UNESCAPE_ANY
)
71 q_real
= string_unescape_any_inplace(out_real
);
73 q_real
= string_unescape_inplace(out_real
, flags
);
74 } else if (flags
== UNESCAPE_ANY
) {
75 q_real
= string_unescape_any(in
, out_real
, q_real
);
77 q_real
= string_unescape(in
, out_real
, q_real
, flags
);
80 if (q_real
!= q_test
|| memcmp(out_test
, out_real
, q_test
)) {
81 pr_warn("Test failed: flags = %u\n", flags
);
82 print_hex_dump(KERN_WARNING
, "Input: ",
83 DUMP_PREFIX_NONE
, 16, 1, in
, p
- 1, true);
84 print_hex_dump(KERN_WARNING
, "Expected: ",
85 DUMP_PREFIX_NONE
, 16, 1, out_test
, q_test
, true);
86 print_hex_dump(KERN_WARNING
, "Got: ",
87 DUMP_PREFIX_NONE
, 16, 1, out_real
, q_real
, true);
91 static int __init
test_string_helpers_init(void)
95 pr_info("Running tests...\n");
96 for (i
= 0; i
< UNESCAPE_ANY
+ 1; i
++)
97 test_string_unescape(i
, false);
98 test_string_unescape(get_random_int() % (UNESCAPE_ANY
+ 1), true);
102 module_init(test_string_helpers_init
);
103 MODULE_LICENSE("Dual BSD/GPL");