com: An 1wire ID object added

We use the ID container for now.
In the future I may add an iterator support in cooperation with 1wire search functionality

include/utl/com/_1wire_id.h

@@ -0,0 +1,92 @@
+/*!
+ * \file    /utl/com/_1wire_id.h
+ * \brief   An 1-wire Rom ID type
+ *
+ * Copyright (C) 2018 Christos Choutouridis
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#ifndef __utl_com_1wire_id_h__
+#define __utl_com_1wire_id_h__
+
+#include <utl/impl/impl.h>
+#include <utl/container/id.h>
+
+namespace utl {
+
+   /*!
+    * 1-wire Rom-ID type
+    */
+   class _1wire_id_t : public id_t<uint8_t, 8> {
+
+   /*!
+    * \name Constructors
+    */
+   //!@{
+   public:
+      _1wire_id_t () noexcept
+         : id_t<uint8_t, 8> {0, 0, 0, 0, 0, 0, 0, 0} { }
+      _1wire_id_t (const _1wire_id_t& id) noexcept {
+         std::copy(id.begin(), id.end(), this->begin());
+      }
+   //!@}
+   /*!
+    * \name User functionality provided by the interface
+    */
+   //!@{
+      //! Return nullDev reference
+      static constexpr const _1wire_id_t& nullDev () { return nullDev_; }
+
+      //!@{
+      //! Return the RomID family code (The LSB)
+      uint8_t& family() noexcept { return front(); }
+      const uint8_t& family() const noexcept { return front(); }
+      //!@}
+
+      //!@{
+      //! Access the CRC8 byte (The MSB).
+      uint8_t& crc8() noexcept { return back(); }
+      const uint8_t& crc8() const noexcept { return back(); }
+      //!@}
+
+      /*!
+       * \brief
+       *    Full compare two dev_ids
+       * \return  The comparison result
+       *    \arg  0    dev_ids are equal
+       *    \arg -1    dev_id lhs is smaller than dev_id rhs
+       *    \arg  1    dev_id rhs is smaller than dev_id lhs
+       */
+      static int compare (const _1wire_id_t& lhs, const _1wire_id_t& rhs) noexcept {
+         auto p = std::mismatch (lhs.rbegin(), lhs.rend(), rhs.rbegin(), rhs.rend());
+         if (p.first == lhs.rend())       return 0;
+         else if (*p.first < *p.second)   return -1;
+         else                             return 1;
+      }
+   //!@{
+
+   //!@{
+   //! Self referenced special null Rom_ID object as static
+   private:
+      static const _1wire_id_t nullDev_;
+   //!@}
+   };
+
+   // Init static member
+   const _1wire_id_t _1wire_id_t::nullDev_ { };
+
+} // namespace tbx
+
+#endif /* __utl_com_1wire_id_h__ */