diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2021-01-22 16:56:52 +0300 |
|---|---|---|
| committer | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2021-02-15 13:43:31 +0300 |
| commit | 0ea09083116de44f1a938482fb704bbfcc7ae6f4 (patch) | |
| tree | 267906688f6bf371b1c4ea8472d8558d74c273b1 /lib | |
| parent | f1f405c35ec217e4f68f9e25cd83d003f8a6d03e (diff) | |
| download | linux-0ea09083116de44f1a938482fb704bbfcc7ae6f4.tar.xz | |
lib/cmdline: Allow get_options() to take 0 to validate the input
Allow get_options() to take 0 as a number of integers parameter to validate
the input.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/cmdline.c | 14 | ||||
| -rw-r--r-- | lib/cmdline_kunit.c | 11 |
2 files changed, 21 insertions, 4 deletions
diff --git a/lib/cmdline.c b/lib/cmdline.c index f33882f1cd52..dfd4c4423f9a 100644 --- a/lib/cmdline.c +++ b/lib/cmdline.c @@ -91,6 +91,9 @@ 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 @@ -103,15 +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 bf8b3ee9e897..018bfc8113c4 100644 --- a/lib/cmdline_kunit.c +++ b/lib/cmdline_kunit.c @@ -109,13 +109,22 @@ static void cmdline_do_one_range_test(struct kunit *test, const char *in, { 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 expected %d numbers, got %d", + 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) |