From ed419140280553b070943b7ba539120a26ff5686 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@gmail.com>
Date: Tue, 11 Dec 2018 07:42:05 +0100
Subject: wanda: restructure directory hierarchy

---
 include/wanda/environment.hpp | 61 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 include/wanda/environment.hpp

(limited to 'include/wanda/environment.hpp')

diff --git a/include/wanda/environment.hpp b/include/wanda/environment.hpp
new file mode 100644
index 0000000..5a702a8
--- /dev/null
+++ b/include/wanda/environment.hpp
@@ -0,0 +1,61 @@
+/**
+ * @file   environment.hpp
+ * @author Felix Morgner (felix.morgner@gmail.com)
+ * @since  1.0.0
+ */
+
+#ifndef WANDA_ENVIRONMENT_HPP
+#define WANDA_ENVIRONMENT_HPP
+
+#include <unistd.h>
+
+#include <map>
+#include <string>
+
+namespace wanda
+{
+  /**
+   * @brief A type to provide access to the runtime environment
+   */
+  struct environment
+  {
+    using map_type = std::map<std::string, std::string>;
+    using iterator = map_type::iterator;
+    using const_iterator = map_type::const_iterator;
+    using reference = map_type::reference;
+    using const_reference = map_type::const_reference;
+
+    /**
+     * @brief Construct a new environment from the given string array
+     */
+    explicit environment(char const * const * env = ::environ);
+
+    /**
+     * @brief Get the value of the given variable
+     * 
+     * @return A mutable reference to the value of the given environment variable
+     */
+    std::string & operator[](std::string const & variable);
+
+    /**
+     * @brief Get the value of the given variable
+     * 
+     * @return An immutable reference to the value of the given environment variable
+     */
+    std::string const & operator[](std::string const & variable) const;
+
+    iterator begin();
+    const_iterator begin() const;
+    const_iterator cbegin() const;
+
+    iterator end();
+    const_iterator end() const;
+    const_iterator cend() const;
+
+  private:
+    map_type m_cache{};
+  };
+
+}  // namespace wanda
+
+#endif
\ No newline at end of file
-- 
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