projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 13 | struct test_string { | |
| 14 | const char *in; | |
| 15 | const char *out; | |
| 16 | unsigned int flags; | |
| 17 | }; | |
| 18 | ||
| 19 | static 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 | ||
| 42 | static 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 | ||
| 91 | static 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 | } | |
| 102 | module_init(test_string_helpers_init); | |
| 103 | MODULE_LICENSE("Dual BSD/GPL"); |