-adding flex_string

git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@214 7ec92016-0320-0410-acc4-a06ded1c099a

include/loki/flex/flex_string_details.h

@@ -0,0 +1,99 @@
+////////////////////////////////////////////////////////////////////////////////
+// flex_string
+// Copyright (c) 2001 by Andrei Alexandrescu
+// Permission to use, copy, modify, distribute and sell this software for any
+//     purpose is hereby granted without fee, provided that the above copyright
+//     notice appear in all copies and that both that copyright notice and this
+//     permission notice appear in supporting documentation.
+// The author makes no representations about the
+//     suitability of this software for any purpose. It is provided "as is"
+//     without express or implied warranty.
+////////////////////////////////////////////////////////////////////////////////
+
+#ifndef FLEX_STRING_DETAILS_INC_
+#define FLEX_STRING_DETAILS_INC_
+
+#include <memory>
+
+namespace flex_string_details
+{
+	template <class InIt, class OutIt>
+	OutIt copy_n(InIt b, typename std::iterator_traits<InIt>::difference_type n, OutIt d)
+	{
+		for (; n != 0; --n, ++b, ++d)
+		{
+			*d = *b;
+		}
+		return d;
+	}
+
+    template <class Pod, class T>
+    inline void pod_fill(Pod* b, Pod* e, T c)
+    {
+        switch ((e - b) & 7)
+        {
+        case 0:
+            while (b != e)
+            {
+                *b = c; ++b;
+        case 7: *b = c; ++b;
+        case 6: *b = c; ++b;
+        case 5: *b = c; ++b;
+        case 4: *b = c; ++b;
+        case 3: *b = c; ++b;
+        case 2: *b = c; ++b;
+        case 1: *b = c; ++b;
+            }
+        }
+    }
+
+    template <class Pod>
+    inline void pod_move(const Pod* b, const Pod* e, Pod* d)
+    {
+        using namespace std;
+        memmove(d, b, (e - b) * sizeof(*b));
+    }
+
+    template <class Pod>
+    inline Pod* pod_copy(const Pod* b, const Pod* e, Pod* d)
+    {
+        const size_t s = e - b;
+        using namespace std;
+        memcpy(d, b, s * sizeof(*b));
+        return d + s;
+    }
+
+    template <typename T> struct get_unsigned
+    {
+        typedef T result;
+    };
+
+    template <> struct get_unsigned<char>
+    {
+        typedef unsigned char result;
+    };
+
+    template <> struct get_unsigned<signed char>
+    {
+        typedef unsigned char result;
+    };
+
+    template <> struct get_unsigned<short int>
+    {
+        typedef unsigned short int result;
+    };
+
+    template <> struct get_unsigned<int>
+    {
+        typedef unsigned int result;
+    };
+
+    template <> struct get_unsigned<long int>
+    {
+        typedef unsigned long int result;
+    };
+
+    enum Shallow {};
+}
+
+#endif // FLEX_STRING_DETAILS_INC_