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commonlib/bsd: Add strlen() and strnlen() functions

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Add strlen() and strnlen() to commonlib/bsd by rewriting them from
scratch, and remove the same functions from coreboot and libpayload.

Note that in the existing libpayload implementation, these functions
return 0 for NULL strings. Given that POSIX doesn't require the NULL
check and that other major libc implementations (e.g. glibc [1]) don't
seem to do that, the new functions also don't perform the NULL check.

[1] https://github.com/bminor/glibc/blob/master/sysdeps/i386/strlen.c

Change-Id: I1203ec9affabe493bd14b46662d212b08240cced
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83830
Reviewed-by: Maximilian Brune <maximilian.brune@9elements.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
This commit is contained in:
Yu-Ping Wu
2024-08-08 17:20:05 +08:00
committed by Yu-Ping Wu
parent 4ea4d82cec
commit 0dcdc0347c
8 changed files with 70 additions and 103 deletions
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28
tests/lib/string-test.c
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@@ -23,12 +23,6 @@ struct string_pairs_t {
{"", ""},
};
const char *strings[] = {
"coreboot",
"is\0very",
"nice\n"
};
/* Used to test atol */
struct str_with_l_val_t {
char *str;
@@ -76,26 +70,6 @@ static void test_strconcat(void **state)
}
}
static void test_strnlen(void **state)
{
int i, n = 5;
size_t str_len, limited_len;
for (i = 0; i < ARRAY_SIZE(strings); i++) {
str_len = __builtin_strlen(strings[i]);
limited_len = MIN(n, str_len);
assert_int_equal(limited_len, strnlen(strings[i], n));
}
}
static void test_strlen(void **state)
{
int i;
for (i = 0; i < ARRAY_SIZE(strings); i++)
assert_int_equal(__builtin_strlen(strings[i]), strlen(strings[i]));
}
static void test_strchr(void **state)
{
char str[] = "Abracadabra!\n";
@@ -227,8 +201,6 @@ int main(void)
const struct CMUnitTest tests[] = {
cmocka_unit_test(test_strdup),
cmocka_unit_test(test_strconcat),
cmocka_unit_test(test_strnlen),
cmocka_unit_test(test_strlen),
cmocka_unit_test(test_strchr),
cmocka_unit_test(test_strrchr),
cmocka_unit_test(test_strncpy),