blob: 6ac48de04c0e57ea9be72a4344fc767df2649c48 [file] [log] [blame]
Andy Shevchenko16c7fa02013-04-30 15:27:30 -07001/*
2 * Test cases for lib/string_helpers.c module.
3 */
4#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
5
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>
12
13struct test_string {
14 const char *in;
15 const char *out;
16 unsigned int flags;
17};
18
19static const struct test_string strings[] __initconst = {
20 {
21 .in = "\\f\\ \\n\\r\\t\\v",
22 .out = "\f\\ \n\r\t\v",
23 .flags = UNESCAPE_SPACE,
24 },
25 {
26 .in = "\\40\\1\\387\\0064\\05\\040\\8a\\110\\777",
27 .out = " \001\00387\0064\005 \\8aH?7",
28 .flags = UNESCAPE_OCTAL,
29 },
30 {
31 .in = "\\xv\\xa\\x2c\\xD\\x6f2",
32 .out = "\\xv\n,\ro2",
33 .flags = UNESCAPE_HEX,
34 },
35 {
36 .in = "\\h\\\\\\\"\\a\\e\\",
37 .out = "\\h\\\"\a\e\\",
38 .flags = UNESCAPE_SPECIAL,
39 },
40};
41
42static void __init test_string_unescape(unsigned int flags, bool inplace)
43{
44 char in[256];
45 char out_test[256];
46 char out_real[256];
47 int i, p = 0, q_test = 0, q_real = sizeof(out_real);
48
49 for (i = 0; i < ARRAY_SIZE(strings); i++) {
50 const char *s = strings[i].in;
51 int len = strlen(strings[i].in);
52
53 /* Copy string to in buffer */
54 memcpy(&in[p], s, len);
55 p += len;
56
57 /* Copy expected result for given flags */
58 if (flags & strings[i].flags) {
59 s = strings[i].out;
60 len = strlen(strings[i].out);
61 }
62 memcpy(&out_test[q_test], s, len);
63 q_test += len;
64 }
65 in[p++] = '\0';
66
67 /* Call string_unescape and compare result */
68 if (inplace) {
69 memcpy(out_real, in, p);
70 if (flags == UNESCAPE_ANY)
71 q_real = string_unescape_any_inplace(out_real);
72 else
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);
76 } else {
77 q_real = string_unescape(in, out_real, q_real, flags);
78 }
79
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);
88 }
89}
90
91static int __init test_string_helpers_init(void)
92{
93 unsigned int i;
94
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);
99
100 return -EINVAL;
101}
102module_init(test_string_helpers_init);
103MODULE_LICENSE("Dual BSD/GPL");