path-util: document a few other special cases for last_path_component()
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@ -715,16 +715,23 @@ char* dirname_malloc(const char *path) {
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}
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}
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const char *last_path_component(const char *path) {
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const char *last_path_component(const char *path) {
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/* Finds the last component of the path, preserving the
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* optional trailing slash that signifies a directory.
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/* Finds the last component of the path, preserving the optional trailing slash that signifies a directory.
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*
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* a/b/c → c
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* a/b/c → c
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* a/b/c/ → c/
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* a/b/c/ → c/
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* x → x
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* x/ → x/
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* /y → y
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* /y/ → y/
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* / → /
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* / → /
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* // → /
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* // → /
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* /foo/a → a
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* /foo/a → a
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* /foo/a/ → a/
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* /foo/a/ → a/
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* This is different than basename, which returns "" when
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*
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* a trailing slash is present.
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* Also, the empty string is mapped to itself.
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*
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* This is different than basename(), which returns "" when a trailing slash is present.
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*/
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*/
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unsigned l, k;
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unsigned l, k;
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@ -399,6 +399,10 @@ static void test_last_path_component(void) {
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assert_se(streq(last_path_component("/foo/a"), "a"));
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assert_se(streq(last_path_component("/foo/a"), "a"));
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assert_se(streq(last_path_component("/foo/a/"), "a/"));
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assert_se(streq(last_path_component("/foo/a/"), "a/"));
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assert_se(streq(last_path_component(""), ""));
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assert_se(streq(last_path_component(""), ""));
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assert_se(streq(last_path_component("a"), "a"));
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assert_se(streq(last_path_component("a/"), "a/"));
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assert_se(streq(last_path_component("/a"), "a"));
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assert_se(streq(last_path_component("/a/"), "a/"));
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}
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}
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static void test_filename_is_valid(void) {
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static void test_filename_is_valid(void) {
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