kernel: implement static_strcmp()

will be used to test functions operating on strings

2 files changed, 17 insertions, 0 deletions

diff --git a/src/kernel/tests/util.c b/src/kernel/tests/util.c
index 5bc8656..81c36d6 100644
--- a/src/kernel/tests/util.c
+++ b/src/kernel/tests/util.c
@@ -21,6 +21,19 @@ TEST(memcmp) {
 	TEST_IF(0 < memcmp("654", "555", 3));
 }
 
+TEST(static_strcmp) {
+	TEST_IF(0 == static_strcmp("",      ""));
+	TEST_IF(0 == static_strcmp("same",  "same"));
+
+	TEST_IF(0 != static_strcmp("same",  "diff"));
+	TEST_IF(0 != static_strcmp("same!", "same"));
+	TEST_IF(0 != static_strcmp("same",  "same!"));
+
+	TEST_IF(0 > static_strcmp("555", "654"));
+	TEST_IF(0 < static_strcmp("654", "555"));
+}
+
 void tests_utils() {
 	TEST_RUN(memcmp);
+	TEST_RUN(static_strcmp);
 }
diff --git a/src/kernel/util.h b/src/kernel/util.h
index b50810d..0aa2c4c 100644
--- a/src/kernel/util.h
+++ b/src/kernel/util.h
@@ -8,3 +8,7 @@ void *memcpy(void *dest, const void *src, size_t n);
 void *memset(void *s, int c, size_t n);
 
 int memcmp(const void *s1, const void *s2, size_t n);
+
+// s1 MUST be a string known at compiletime
+#define static_strcmp(s1, s2) \
+	memcmp(s1, s2, sizeof(s1))