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Commit | Line | Data |
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16c7fa05 AS |
1 | /* |
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 | ||
45ff337a AS |
13 | static __init bool test_string_check_buf(const char *name, unsigned int flags, |
14 | char *in, size_t p, | |
15 | char *out_real, size_t q_real, | |
16 | char *out_test, size_t q_test) | |
17 | { | |
18 | if (q_real == q_test && !memcmp(out_test, out_real, q_test)) | |
19 | return true; | |
20 | ||
21 | pr_warn("Test '%s' failed: flags = %u\n", name, flags); | |
22 | ||
23 | print_hex_dump(KERN_WARNING, "Input: ", DUMP_PREFIX_NONE, 16, 1, | |
24 | in, p, true); | |
25 | print_hex_dump(KERN_WARNING, "Expected: ", DUMP_PREFIX_NONE, 16, 1, | |
26 | out_test, q_test, true); | |
27 | print_hex_dump(KERN_WARNING, "Got: ", DUMP_PREFIX_NONE, 16, 1, | |
28 | out_real, q_real, true); | |
29 | ||
30 | return false; | |
31 | } | |
32 | ||
16c7fa05 AS |
33 | struct test_string { |
34 | const char *in; | |
35 | const char *out; | |
36 | unsigned int flags; | |
37 | }; | |
38 | ||
39 | static const struct test_string strings[] __initconst = { | |
40 | { | |
41 | .in = "\\f\\ \\n\\r\\t\\v", | |
42 | .out = "\f\\ \n\r\t\v", | |
43 | .flags = UNESCAPE_SPACE, | |
44 | }, | |
45 | { | |
46 | .in = "\\40\\1\\387\\0064\\05\\040\\8a\\110\\777", | |
47 | .out = " \001\00387\0064\005 \\8aH?7", | |
48 | .flags = UNESCAPE_OCTAL, | |
49 | }, | |
50 | { | |
51 | .in = "\\xv\\xa\\x2c\\xD\\x6f2", | |
52 | .out = "\\xv\n,\ro2", | |
53 | .flags = UNESCAPE_HEX, | |
54 | }, | |
55 | { | |
56 | .in = "\\h\\\\\\\"\\a\\e\\", | |
57 | .out = "\\h\\\"\a\e\\", | |
58 | .flags = UNESCAPE_SPECIAL, | |
59 | }, | |
60 | }; | |
61 | ||
45ff337a AS |
62 | static void __init test_string_unescape(const char *name, unsigned int flags, |
63 | bool inplace) | |
16c7fa05 AS |
64 | { |
65 | char in[256]; | |
66 | char out_test[256]; | |
67 | char out_real[256]; | |
68 | int i, p = 0, q_test = 0, q_real = sizeof(out_real); | |
69 | ||
70 | for (i = 0; i < ARRAY_SIZE(strings); i++) { | |
71 | const char *s = strings[i].in; | |
72 | int len = strlen(strings[i].in); | |
73 | ||
74 | /* Copy string to in buffer */ | |
75 | memcpy(&in[p], s, len); | |
76 | p += len; | |
77 | ||
78 | /* Copy expected result for given flags */ | |
79 | if (flags & strings[i].flags) { | |
80 | s = strings[i].out; | |
81 | len = strlen(strings[i].out); | |
82 | } | |
83 | memcpy(&out_test[q_test], s, len); | |
84 | q_test += len; | |
85 | } | |
86 | in[p++] = '\0'; | |
87 | ||
88 | /* Call string_unescape and compare result */ | |
89 | if (inplace) { | |
90 | memcpy(out_real, in, p); | |
91 | if (flags == UNESCAPE_ANY) | |
92 | q_real = string_unescape_any_inplace(out_real); | |
93 | else | |
94 | q_real = string_unescape_inplace(out_real, flags); | |
95 | } else if (flags == UNESCAPE_ANY) { | |
96 | q_real = string_unescape_any(in, out_real, q_real); | |
97 | } else { | |
98 | q_real = string_unescape(in, out_real, q_real, flags); | |
99 | } | |
100 | ||
45ff337a AS |
101 | test_string_check_buf(name, flags, in, p - 1, out_real, q_real, |
102 | out_test, q_test); | |
16c7fa05 AS |
103 | } |
104 | ||
105 | static int __init test_string_helpers_init(void) | |
106 | { | |
107 | unsigned int i; | |
108 | ||
109 | pr_info("Running tests...\n"); | |
110 | for (i = 0; i < UNESCAPE_ANY + 1; i++) | |
45ff337a AS |
111 | test_string_unescape("unescape", i, false); |
112 | test_string_unescape("unescape inplace", | |
113 | get_random_int() % (UNESCAPE_ANY + 1), true); | |
16c7fa05 AS |
114 | |
115 | return -EINVAL; | |
116 | } | |
117 | module_init(test_string_helpers_init); | |
118 | MODULE_LICENSE("Dual BSD/GPL"); |