diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/cmdline.c | 21 | ||||
| -rw-r--r-- | lib/cmdline_kunit.c | 56 |
2 files changed, 73 insertions, 4 deletions
diff --git a/lib/cmdline.c b/lib/cmdline.c index b390dd03363b..dfd4c4423f9a 100644 --- a/lib/cmdline.c +++ b/lib/cmdline.c @@ -83,7 +83,7 @@ EXPORT_SYMBOL(get_option); * get_options - Parse a string into a list of integers * @str: String to be parsed * @nints: size of integer array - * @ints: integer array + * @ints: integer array (must have room for at least one element) * * This function parses a string containing a comma-separated * list of integers, a hyphen-separated range of _positive_ integers, @@ -91,6 +91,14 @@ EXPORT_SYMBOL(get_option); * full, or when no more numbers can be retrieved from the * string. * + * When @nints is 0, the function just validates the given @str and + * returns the amount of parseable integers as described below. + * + * Returns: + * + * The first element is filled by the number of collected integers + * in the range. The rest is what was parsed from the @str. + * * Return value is the character in the string which caused * the parse to end (typically a null terminator, if @str is * completely parseable). @@ -98,15 +106,20 @@ EXPORT_SYMBOL(get_option); char *get_options(const char *str, int nints, int *ints) { + bool validate = (nints == 0); int res, i = 1; - while (i < nints) { - res = get_option((char **)&str, ints + i); + while (i < nints || validate) { + int *pint = validate ? ints : ints + i; + + res = get_option((char **)&str, pint); if (res == 0) break; if (res == 3) { + int n = validate ? 0 : nints - i; int range_nums; - range_nums = get_range((char **)&str, ints + i, nints - i); + + range_nums = get_range((char **)&str, pint, n); if (range_nums < 0) break; /* diff --git a/lib/cmdline_kunit.c b/lib/cmdline_kunit.c index 550e7a47fd24..018bfc8113c4 100644 --- a/lib/cmdline_kunit.c +++ b/lib/cmdline_kunit.c @@ -18,6 +18,26 @@ static const int cmdline_test_values[] = { 1, 3, 2, 1, 1, 1, 3, 1, }; +static_assert(ARRAY_SIZE(cmdline_test_strings) == ARRAY_SIZE(cmdline_test_values)); + +static const char *cmdline_test_range_strings[] = { + "-7" , "--7" , "-1-2" , "7--9", + "7-" , "-7--9", "7-9," , "9-7" , + "5-a", "a-5" , "5-8" , ",8-5", + "+,1", "-,4" , "-3,0-1,6", "4,-" , + " +2", " -9" , "0-1,-3,6", "- 9" , +}; + +static const int cmdline_test_range_values[][16] = { + { 1, -7, }, { 0, -0, }, { 4, -1, 0, +1, 2, }, { 0, 7, }, + { 0, +7, }, { 0, -7, }, { 3, +7, 8, +9, 0, }, { 0, 9, }, + { 0, +5, }, { 0, -0, }, { 4, +5, 6, +7, 8, }, { 0, 0, }, + { 0, +0, }, { 0, -0, }, { 4, -3, 0, +1, 6, }, { 1, 4, }, + { 0, +0, }, { 0, -0, }, { 4, +0, 1, -3, 6, }, { 0, 0, }, +}; + +static_assert(ARRAY_SIZE(cmdline_test_range_strings) == ARRAY_SIZE(cmdline_test_range_values)); + static void cmdline_do_one_test(struct kunit *test, const char *in, int rc, int offset) { const char *fmt = "Pattern: %s"; @@ -84,10 +104,46 @@ static void cmdline_test_tail_int(struct kunit *test) } while (++i < ARRAY_SIZE(cmdline_test_strings)); } +static void cmdline_do_one_range_test(struct kunit *test, const char *in, + unsigned int n, const int *e) +{ + unsigned int i; + int r[16]; + int *p; + + memset(r, 0, sizeof(r)); + get_options(in, ARRAY_SIZE(r), r); + KUNIT_EXPECT_EQ_MSG(test, r[0], e[0], "in test %u (parsed) expected %d numbers, got %d", + n, e[0], r[0]); + for (i = 1; i < ARRAY_SIZE(r); i++) + KUNIT_EXPECT_EQ_MSG(test, r[i], e[i], "in test %u at %u", n, i); + + memset(r, 0, sizeof(r)); + get_options(in, 0, r); + KUNIT_EXPECT_EQ_MSG(test, r[0], e[0], "in test %u (validated) expected %d numbers, got %d", + n, e[0], r[0]); + + p = memchr_inv(&r[1], 0, sizeof(r) - sizeof(r[0])); + KUNIT_EXPECT_PTR_EQ_MSG(test, p, (int *)0, "in test %u at %u out of bound", n, p - r); +} + +static void cmdline_test_range(struct kunit *test) +{ + unsigned int i = 0; + + do { + const char *str = cmdline_test_range_strings[i]; + const int *e = cmdline_test_range_values[i]; + + cmdline_do_one_range_test(test, str, i, e); + } while (++i < ARRAY_SIZE(cmdline_test_range_strings)); +} + static struct kunit_case cmdline_test_cases[] = { KUNIT_CASE(cmdline_test_noint), KUNIT_CASE(cmdline_test_lead_int), KUNIT_CASE(cmdline_test_tail_int), + KUNIT_CASE(cmdline_test_range), {} }; |