cxx: Add strbuf support

Comes in two fashions:
 - strbuf_view (read-only)
 - strbuf (read/write)

src/Makefile_Cxx.am

@@ -151,6 +151,7 @@ bindings/cxx/eina_cxx/eina_ptrlist.hh \
 bindings/cxx/eina_cxx/eina_range_types.hh \
 bindings/cxx/eina_cxx/eina_ref.hh \
 bindings/cxx/eina_cxx/eina_stringshare.hh \
+bindings/cxx/eina_cxx/eina_strbuf.hh \
 bindings/cxx/eina_cxx/eina_string_view.hh \
 bindings/cxx/eina_cxx/eina_thread.hh \
 bindings/cxx/eina_cxx/eina_throw.hh \

src/bindings/cxx/eina_cxx/Eina.hh

@@ -14,6 +14,7 @@
 #include <eina_list.hh>
 #include <eina_stringshare.hh>
 #include <eina_string_view.hh>
+#include <eina_strbuf.hh>
 #include <eina_error.hh>
 #include <eina_accessor.hh>
 #include <eina_thread.hh>

src/bindings/cxx/eina_cxx/eina_strbuf.hh

@@ -0,0 +1,384 @@
+#ifndef EINA_CXX_STRBUF_HH
+#define EINA_CXX_STRBUF_HH
+
+#include <Eina.h>
+#include <eina_type_traits.hh>
+#include <eina_throw.hh>
+#include <eina_error.hh>
+
+#include <cstring>
+
+// FIXME: Needs doc, I guess :)
+
+namespace efl { namespace eina {
+
+template <typename strbuf_type, typename basic_type>
+struct _strbuf_view_trait
+{
+   typedef basic_type value_type;
+   typedef value_type& reference;
+   typedef value_type* pointer;
+   typedef value_type const& const_reference;
+   typedef value_type const* const_pointer;
+   typedef const_pointer const_iterator;
+   typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
+   typedef std::ptrdiff_t difference_type;
+   typedef std::size_t size_type;
+
+   _strbuf_view_trait() = delete;
+
+   /** Create a new view from another _strbuf_view_trait */
+   _strbuf_view_trait(_strbuf_view_trait const& other)
+      : _sb(other._sb)
+   {
+   }
+
+   /** Create a new view from an existing Eina_Strbuf */
+   _strbuf_view_trait(Eina_Strbuf const* sb)
+      : _sb(const_cast<Eina_Strbuf *>(sb))
+   {
+   }
+
+   /**
+    * @brief Tells whether this object contains a real Eina_Strbuf or not
+    * @return true if wrapping an Eina_Strbuf, false if contains nullptr.
+    */
+   bool empty() const
+   {
+      return (_sb != nullptr);
+   }
+
+   /**
+    * @brief Get the contained C string
+    * @return A C-style string (const char*)
+    */
+   const char * c_str() const
+   {
+      return ::eina_strbuf_string_get(_sb);
+   }
+
+   /**
+    * @brief Convert to a string
+    * @return A std::string copy
+    */
+   operator std::string() const
+   {
+      return std::string(c_str());
+   }
+
+   /**
+    * @brief Get the size of the string.
+    * @return Number of characters in the string.
+    */
+   size_type size() const
+   {
+     return eina_strbuf_length_get(_sb);
+   }
+
+   /**
+    * @brief Alias to @ref size() const.
+    */
+   size_type length() const
+   {
+     return size();
+   }
+
+   /**
+    * @brief Get a constant iterator pointing to the first character of the string.
+    * @return Constant iterator to the initial position of the string.
+    *
+    * This member function returns a constant iterator pointing to the
+    * first character of the string. If the string is empty the iterator
+    * is equal to the one returned by @ref end() const.
+    */
+   const_iterator begin() const
+   {
+      return ::eina_strbuf_string_get(_sb);
+   }
+
+   /**
+    * @brief Get a constant iterator to the position following the last character of the string.
+    * @return Constant iterator to the final position of the string.
+    *
+    * This member function returns an constant iterator to the position
+    * following the last character in the string. If the string is empty
+    * the iterator is equal to the one returned by @ref begin().
+    *
+    * @note Note that attempting to access this position causes undefined
+    * behavior.
+    */
+   const_iterator end() const
+   {
+      return begin() + size();
+   }
+
+   /**
+    * @brief Get a constant reverse iterator pointing to the reverse begin of the string.
+    * @return Constant reverse iterator pointing to the reverse begin of the string.
+    *
+    * This member function returns a constant reverse iterator pointing
+    * to the last character of the string. If the string is empty the
+    * returned reverse iterator is the same as the one returned by
+    * @ref rend() const.
+    */
+   const_reverse_iterator rbegin() const
+   {
+      return const_reverse_iterator(end());
+   }
+
+   /**
+    * @brief Get a constant reverse iterator pointing to the reverse end of the string.
+    * @return Constant reverse iterator pointing to the reverse end of the string.
+    *
+    * This member function returns a constant reverse iterator pointing
+    * to the position before the first character of the string. If the
+    * string is empty the returned iterator is the same as the one
+    * returned by @ref rbegin() const.
+    *
+    * @note Note that attempting to access this position causes undefined
+    * behavior.
+    */
+   const_reverse_iterator rend() const
+   {
+      return const_reverse_iterator(begin());
+   }
+
+   /**
+    * @brief Get a constant iterator to the position following the last character of the string.
+    * @return Constant iterator to the final position of the string.
+    *
+    * This member function works just like @ref end() const. But it is
+    * granted to always return a constant iterator.
+    */
+   const_iterator cend() const
+   {
+      return end();
+   }
+
+   /**
+    * @brief Get a constant reverse iterator pointing to the reverse begin of the string.
+    * @return Constant reverse iterator pointing to the reverse begin of the string.
+    *
+    * This member function works just like @ref rbegin() const. But it is
+    * granted to always return a constant reverse iterator.
+    */
+   const_reverse_iterator crbegin() const
+   {
+      return rbegin();
+   }
+
+   /**
+    * @brief Get a constant reverse iterator pointing to the reverse end of the string.
+    * @return Constant reverse iterator pointing to the reverse end of the string.
+    *
+    * This member function works just like @ref rend() const. But it is
+    * granted to always return a constant reverse iterator.
+    */
+   const_reverse_iterator crend() const
+   {
+      return rend();
+   }
+
+   /**
+    * @brief Get the maximum number of characters a string can hold.
+    * @return Maximum number of characters a string can hold.
+    */
+   size_type max_size() const
+   {
+      return static_cast<size_type>(-1);
+   }
+
+   typedef strbuf_type* native_handle_type;
+   native_handle_type native_handle() const
+   {
+      return _sb;
+   }
+
+protected:
+   strbuf_type *_sb;
+};
+
+
+/** A read-only view of an existing Eina_Strbuf. */
+typedef _strbuf_view_trait<const Eina_Strbuf, const char> strbuf_view;
+
+static struct _strbuf_empty_t {} _strbuf_empty;
+
+
+/** Allocates and manages an Eina_Strbuf, this is a mutable object. */
+struct strbuf : public _strbuf_view_trait<Eina_Strbuf, char>
+{
+   strbuf(const char *str = nullptr)
+      : _strbuf_view_trait(::eina_strbuf_new())
+   {
+      if (!_sb) EFL_CXX_THROW(std::make_error_code(std::errc::not_enough_memory));
+      eina_strbuf_append(_sb, str);
+   }
+
+   explicit strbuf(_strbuf_empty_t)
+      : _strbuf_view_trait(nullptr)
+   {
+   }
+
+   explicit strbuf(Eina_Strbuf* sb) = delete;
+
+   strbuf(Eina_Strbuf const* sb)
+      : strbuf(eina_strbuf_string_get(sb))
+   {
+   }
+
+   strbuf(Eina_Strbuf const& sb)
+      : strbuf(eina_strbuf_string_get(&sb))
+   {
+   }
+
+   strbuf(strbuf_view const& other)
+      : strbuf(other.native_handle())
+   {
+   }
+
+   strbuf(strbuf&& other)
+      : strbuf(_strbuf_empty)
+   {
+      swap(other);
+   }
+
+   template <typename S>
+   strbuf(S const& str)
+      : strbuf(std::string(str).c_str())
+   {
+   }
+
+   ~strbuf()
+   {
+      ::eina_strbuf_free(_sb);
+   }
+
+   void swap(strbuf& other)
+   {
+      std::swap(_sb, other._sb);
+   }
+
+   strbuf dup()
+   {
+      return strbuf(c_str());
+   }
+
+   strbuf& reset()
+   {
+      ::eina_strbuf_reset(_sb);
+      return *this;
+   }
+
+   template <typename S>
+   strbuf& append(S const& str)
+   {
+      ::eina_strbuf_append(_sb, std::string(str).c_str());
+      return *this;
+   }
+
+   template <typename S, typename... Args>
+   strbuf& append_printf(S const& fmt, Args... args)
+   {
+      ::eina_strbuf_append_printf(_sb, std::string(fmt).c_str(), args...);
+      return *this;
+   }
+
+   template <typename S, typename... Args>
+   strbuf& insert_printf(S const& fmt, size_t pos, Args... args)
+   {
+      ::eina_strbuf_insert_printf(_sb, std::string(fmt).c_str(), pos, args...);
+      return *this;
+   }
+
+   template <typename S>
+   strbuf& append_strftime(S const& fmt, struct tm const& time)
+   {
+      ::eina_strbuf_append_strftime(_sb, std::string(fmt).c_str(), &time);
+      return *this;
+   }
+
+   template <typename S, typename... Args>
+   strbuf& insert_strftime(S const& fmt, size_t pos, struct tm const& time)
+   {
+      ::eina_strbuf_insert_printf(_sb, std::string(fmt).c_str(), pos, time);
+      return *this;
+   }
+
+   strbuf& trim()
+   {
+      ::eina_strbuf_trim(_sb);
+      return *this;
+   }
+
+   strbuf& ltrim()
+   {
+      ::eina_strbuf_ltrim(_sb);
+      return *this;
+   }
+
+   strbuf& rtrim()
+   {
+      ::eina_strbuf_rtrim(_sb);
+      return *this;
+   }
+
+   // FIXME: add toupper!!
+   strbuf& tolower()
+   {
+      ::eina_strbuf_tolower(_sb);
+      return *this;
+   }
+
+   strbuf substr_get(size_t pos, size_t len)
+   {
+      strbuf sb(_strbuf_empty);
+      sb._sb = ::eina_strbuf_substr_get(_sb, pos, len);
+      return sb;
+   }
+
+   char * steal()
+   {
+      return ::eina_strbuf_string_steal(_sb);
+   }
+
+   template <typename S>
+   strbuf& operator=(S const& other)
+   {
+      return reset().append(other);
+   }
+
+   template <typename S>
+   strbuf& operator+=(S const& other)
+   {
+      return append(other);
+   }
+};
+
+
+/** A writeable Eina_Strbuf wrapper, does not allocate or destroy the Eina_Strbuf. */
+struct strbuf_wrapper : public strbuf
+{
+   strbuf_wrapper() = delete;
+   strbuf_wrapper(strbuf_view const& other) = delete;
+
+   explicit strbuf_wrapper(Eina_Strbuf* sb)
+      : strbuf(_strbuf_empty)
+   {
+      _sb = sb;
+   }
+
+   strbuf_wrapper(Eina_Strbuf& sb)
+      : strbuf_wrapper(&sb)
+   {
+   }
+
+   ~strbuf_wrapper()
+   {
+      _sb = nullptr;
+   }
+};
+
+} }
+
+#endif