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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>
This commit is contained in:
Andy Shevchenko 2021-01-22 15:56:52 +02:00 committed by Bartosz Golaszewski
parent f1f405c35e
commit 0ea0908311
2 changed files with 21 additions and 4 deletions
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14
lib/cmdline.c
View File

@ -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;
/*

11
lib/cmdline_kunit.c
View File

@ -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)