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>
13 static __init bool test_string_check_buf(const char *name, unsigned int flags,
15 char *out_real, size_t q_real,
16 char *out_test, size_t q_test)
18 if (q_real == q_test && !memcmp(out_test, out_real, q_test))
21 pr_warn("Test '%s' failed: flags = %u\n", name, flags);
23 print_hex_dump(KERN_WARNING, "Input: ", DUMP_PREFIX_NONE, 16, 1,
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);
39 static const struct test_string strings[] __initconst = {
41 .in = "\\f\\ \\n\\r\\t\\v",
42 .out = "\f\\ \n\r\t\v",
43 .flags = UNESCAPE_SPACE,
46 .in = "\\40\\1\\387\\0064\\05\\040\\8a\\110\\777",
47 .out = " \001\00387\0064\005 \\8aH?7",
48 .flags = UNESCAPE_OCTAL,
51 .in = "\\xv\\xa\\x2c\\xD\\x6f2",
53 .flags = UNESCAPE_HEX,
56 .in = "\\h\\\\\\\"\\a\\e\\",
57 .out = "\\h\\\"\a\e\\",
58 .flags = UNESCAPE_SPECIAL,
62 static void __init test_string_unescape(const char *name, unsigned int flags,
68 int i, p = 0, q_test = 0, q_real = sizeof(out_real);
70 for (i = 0; i < ARRAY_SIZE(strings); i++) {
71 const char *s = strings[i].in;
72 int len = strlen(strings[i].in);
74 /* Copy string to in buffer */
75 memcpy(&in[p], s, len);
78 /* Copy expected result for given flags */
79 if (flags & strings[i].flags) {
81 len = strlen(strings[i].out);
83 memcpy(&out_test[q_test], s, len);
88 /* Call string_unescape and compare result */
90 memcpy(out_real, in, p);
91 if (flags == UNESCAPE_ANY)
92 q_real = string_unescape_any_inplace(out_real);
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);
98 q_real = string_unescape(in, out_real, q_real, flags);
101 test_string_check_buf(name, flags, in, p - 1, out_real, q_real,
105 static int __init test_string_helpers_init(void)
109 pr_info("Running tests...\n");
110 for (i = 0; i < UNESCAPE_ANY + 1; i++)
111 test_string_unescape("unescape", i, false);
112 test_string_unescape("unescape inplace",
113 get_random_int() % (UNESCAPE_ANY + 1), true);
117 module_init(test_string_helpers_init);
118 MODULE_LICENSE("Dual BSD/GPL");