libk: add some tests

- merge types.h and type_traits.h

1 files changed, 26 insertions, 0 deletions

diff --git a/libk/string/string.cc b/libk/string/string.cc
new file mode 100644
index 0000000..c75feb1
--- /dev/null
+++ b/libk/string/string.cc
@@ -0,0 +1,26 @@
+#include "string.h"
+
+// TODO
+
+// int strcpy(char *dst, const char *stc);
+// void strcat(void *dst, const void *src);
+// char* strncpy(char *dest, const char *src, int length);
+// int strncmp(const char *s1, const char *s2, int c);
+
+/* strcmp - compare two C-strings */
+constexpr int strcmp(const char* s1, const char* s2) {
+  const auto s1_len = strlen(s1);
+  for (size_t i = 0; i < s1_len; ++i) {
+    if (s1[i] == s2[i])
+      continue;
+    if (s1[i] > s2[i])
+      return 1;
+    if (s1[i] < s2[i])
+      return -1;
+  }
+  return 0;
+}
+
+static_assert(strcmp("one", "one") == 0);
+static_assert(strcmp("one", "two") < 0);
+static_assert(strcmp("foo", "bar") > 0);