SymbX/systemd
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

string-util: add str_common_prefix() helper that determines length of common prefix of two strings

Browse Source
This commit is contained in:
Lennart Poettering
2025-02-17 14:57:03 +01:00
parent 42839efb10
commit f77f363c95
3 changed files with 37 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/test/test-string-util.c
+19
View File
@@ -1408,4 +1408,23 @@ TEST(strrstr) {
assert_se(!strrstr(p, "xx"));
}
TEST(str_common_prefix) {
ASSERT_EQ(str_common_prefix("", ""), SIZE_MAX);
ASSERT_EQ(str_common_prefix("a", "a"), SIZE_MAX);
ASSERT_EQ(str_common_prefix("aa", "aa"), SIZE_MAX);
ASSERT_EQ(str_common_prefix("aa", "bb"), 0U);
ASSERT_EQ(str_common_prefix("bb", "aa"), 0U);
ASSERT_EQ(str_common_prefix("aa", "ab"), 1U);
ASSERT_EQ(str_common_prefix("ab", "aa"), 1U);
ASSERT_EQ(str_common_prefix("systemd-resolved", "systemd-networkd"), 8U);
ASSERT_EQ(str_common_prefix("systemd-", "systemd-networkd"), 8U);
ASSERT_EQ(str_common_prefix("systemd-networkd", "systemd-"), 8U);
ASSERT_EQ(str_common_prefix("syst", "systemd-networkd"), 4U);
ASSERT_EQ(str_common_prefix("systemd-networkd", "syst"), 4U);
ASSERT_EQ(str_common_prefix("s", "systemd-networkd"), 1U);
ASSERT_EQ(str_common_prefix("systemd-networkd", "s"), 1U);
ASSERT_EQ(str_common_prefix("", "systemd-networkd"), 0U);
ASSERT_EQ(str_common_prefix("systemd-networkd", ""), 0U);
}
DEFINE_TEST_MAIN(LOG_DEBUG);