feat: String support algorithms

include/mrdox/Support/String.hpp

@@ -0,0 +1,64 @@
+//
+// Licensed under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+// Copyright (c) 2023 Vinnie Falco (vinnie.falco@gmail.com)
+//
+// Official repository: https://github.com/cppalliance/mrdox
+//
+
+#ifndef MRDOX_API_SUPPORT_STRING_HPP
+#define MRDOX_API_SUPPORT_STRING_HPP
+
+#include <mrdox/Platform.hpp>
+#include <string_view>
+
+namespace clang {
+namespace mrdox {
+
+inline
+std::string_view
+ltrim(std::string_view s)
+{
+    auto it = s.begin();
+    for (;; ++it)
+    {
+        if (it == s.end())
+            return {};
+        if (!isspace(*it))
+            break;
+    }
+    return s.substr(it - s.begin());
+}
+
+inline
+std::string_view
+rtrim(std::string_view s)
+{
+    auto it = s.end() - 1;
+    for (; it > s.begin() && isspace(*it); --it);
+    return s.substr(0, it - s.begin());
+}
+
+inline
+std::string_view
+trim(std::string_view s)
+{
+    auto left = s.begin();
+    for (;; ++left)
+    {
+        if (left == s.end())
+            return {};
+        if (!isspace(*left))
+            break;
+    }
+    auto right = s.end() - 1;
+    for (; right > left && isspace(*right); --right);
+    return std::string_view(&*left, right - left + 1);
+}
+
+} // mrdox
+} // clang
+
+#endif