Refactor and improve CTL and other code

ctl/strcmp.cc

@@ -0,0 +1,43 @@
+// -*- mode:c++; indent-tabs-mode:nil; c-basic-offset:4; coding:utf-8 -*-
+// vi: set et ft=c++ ts=4 sts=4 sw=4 fenc=utf-8
+//
+// Copyright 2024 Justine Alexandra Roberts Tunney
+//
+// Permission to use, copy, modify, and/or distribute this software for
+// any purpose with or without fee is hereby granted, provided that the
+// above copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+// WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+// AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+// DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+// PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+// TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#include "string_view.h"
+
+#include <string.h>
+
+namespace ctl {
+
+int
+strcmp(const string_view lhs, const string_view rhs) noexcept
+{
+    int r;
+    size_t m = lhs.n;
+    if ((m = rhs.n < m ? rhs.n : m)) {
+        if (!m)
+            return 0;
+        if ((r = memcmp(lhs.p, rhs.p, m)))
+            return r;
+    }
+    if (lhs.n == rhs.n)
+        return 0;
+    if (m < lhs.n)
+        return +1;
+    return -1;
+}
+
+} // namespace ctl