lib: Add a function to split a string into substrings
Some environment variables provide a space-separated list of strings. It
is easier to process these when they are broken out into an array of
strings.
Add a utility function to handle this.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/test/str_ut.c b/test/str_ut.c
index 5a84434..fa9328e 100644
--- a/test/str_ut.c
+++ b/test/str_ut.c
@@ -274,6 +274,88 @@
}
STR_TEST(str_trailing, 0);
+static int test_str_to_list(struct unit_test_state *uts)
+{
+ const char **ptr;
+ ulong start;
+
+ /* check out of memory */
+ start = ut_check_delta(0);
+ malloc_enable_testing(0);
+ ut_assertnull(str_to_list(""));
+ ut_assertok(ut_check_delta(start));
+
+ ut_assertnull(str_to_list("this is a test"));
+ ut_assertok(ut_check_delta(start));
+
+ malloc_enable_testing(1);
+ ut_assertnull(str_to_list("this is a test"));
+ ut_assertok(ut_check_delta(start));
+
+ /* for an empty string, only one nalloc is needed */
+ malloc_enable_testing(1);
+ ptr = str_to_list("");
+ ut_assertnonnull(ptr);
+ ut_assertnull(ptr[0]);
+ str_free_list(ptr);
+ ut_assertok(ut_check_delta(start));
+
+ malloc_disable_testing();
+
+ /* test the same again, without any nalloc restrictions */
+ ptr = str_to_list("");
+ ut_assertnonnull(ptr);
+ ut_assertnull(ptr[0]);
+ str_free_list(ptr);
+ ut_assertok(ut_check_delta(start));
+
+ /* test a single string */
+ start = ut_check_delta(0);
+ ptr = str_to_list("hi");
+ ut_assertnonnull(ptr);
+ ut_assertnonnull(ptr[0]);
+ ut_asserteq_str("hi", ptr[0]);
+ ut_assertnull(ptr[1]);
+ str_free_list(ptr);
+ ut_assertok(ut_check_delta(start));
+
+ /* test two strings */
+ ptr = str_to_list("hi there");
+ ut_assertnonnull(ptr);
+ ut_assertnonnull(ptr[0]);
+ ut_asserteq_str("hi", ptr[0]);
+ ut_assertnonnull(ptr[1]);
+ ut_asserteq_str("there", ptr[1]);
+ ut_assertnull(ptr[2]);
+ str_free_list(ptr);
+ ut_assertok(ut_check_delta(start));
+
+ /* test leading, trailing and multiple spaces */
+ ptr = str_to_list(" more space ");
+ ut_assertnonnull(ptr);
+ ut_assertnonnull(ptr[0]);
+ ut_asserteq_str("", ptr[0]);
+ ut_assertnonnull(ptr[1]);
+ ut_asserteq_str("more", ptr[1]);
+ ut_assertnonnull(ptr[2]);
+ ut_asserteq_str("", ptr[2]);
+ ut_assertnonnull(ptr[3]);
+ ut_asserteq_str("space", ptr[3]);
+ ut_assertnonnull(ptr[4]);
+ ut_asserteq_str("", ptr[4]);
+ ut_assertnonnull(ptr[5]);
+ ut_asserteq_str("", ptr[5]);
+ ut_assertnull(ptr[6]);
+ str_free_list(ptr);
+ ut_assertok(ut_check_delta(start));
+
+ /* test freeing a NULL pointer */
+ str_free_list(NULL);
+
+ return 0;
+}
+STR_TEST(test_str_to_list, 0);
+
int do_ut_str(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
struct unit_test *tests = UNIT_TEST_SUITE_START(str_test);