3 files changed, 56 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ab5ca79..9172e4f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,11 +8,13 @@ set(This Uri)
 set(Headers
     include/Uri/Uri.hpp
     src/IsCharacterInSet.hpp
+    src/NormalizeCaseInsensitiveString.hpp
     src/PercentEncodedCharacterDecoder.hpp
 )
 
 set(Sources
     src/IsCharacterInSet.cpp
+    src/NormalizeCaseInsensitiveString.cpp
     src/PercentEncodedCharacterDecoder.cpp
     src/Uri.cpp
 )
diff --git a/src/NormalizeCaseInsensitiveString.cpp b/src/NormalizeCaseInsensitiveString.cpp
new file mode 100644
index 0000000..761c72a
--- /dev/null
+++ b/src/NormalizeCaseInsensitiveString.cpp
@@ -0,0 +1,24 @@
+/**
+ * @file NormalizeCaseInsensitiveString.cpp
+ *
+ * This module contains the implementation of the
+ * Uri::NormalizeCaseInsensitiveString function.
+ *
+ * © 2018 by Richard Walters
+ */
+
+#include "NormalizeCaseInsensitiveString.hpp"
+
+#include <ctype.h>
+
+namespace Uri {
+
+    std::string NormalizeCaseInsensitiveString(const std::string& inString) {
+        std::string outString;
+        for (char c: inString) {
+            outString.push_back(tolower(c));
+        }
+        return outString;
+    }
+
+}
diff --git a/src/NormalizeCaseInsensitiveString.hpp b/src/NormalizeCaseInsensitiveString.hpp
new file mode 100644
index 0000000..014dd74
--- /dev/null
+++ b/src/NormalizeCaseInsensitiveString.hpp
@@ -0,0 +1,30 @@
+#ifndef URI_NORMALIZE_CASE_INSENSITIVE_STRING_HPP
+#define URI_NORMALIZE_CASE_INSENSITIVE_STRING_HPP
+
+/**
+ * @file NormalizeCaseInsensitiveString.hpp
+ *
+ * This module declares the Uri::NormalizeCaseInsensitiveString function.
+ *
+ * © 2018 by Richard Walters
+ */
+
+#include <string>
+
+namespace Uri {
+
+    /**
+     * This function takes a string and swaps all upper-case characters
+     * with their lower-case equivalents, returning the result.
+     *
+     * @param[in] inString
+     *     This is the string to be normalized.
+     *
+     * @return
+     *     The normalized string is returned.  All upper-case characters
+     *     are replaced with their lower-case equivalents.
+     */
+    std::string NormalizeCaseInsensitiveString(const std::string& inString);
+}
+
+#endif /* URI_NORMALIZE_CASE_INSENSITIVE_STRING_HPP */