Flatten the file hierarchy.

The division between detail and main wasn't making much sense.

[SVN r59317]

input_path.cpp

@@ -0,0 +1,42 @@
+/*=============================================================================
+    Copyright (c) 2009 Daniel James
+
+    Use, modification and distribution is subject to the Boost Software
+    License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+    http://www.boost.org/LICENSE_1_0.txt)
+=============================================================================*/
+
+#include <boost/program_options.hpp>
+#include "input_path.hpp"
+
+#if defined(__cygwin__) || defined(__CYGWIN__)
+#include <boost/filesystem/config.hpp>
+#include <windows.h>
+#include <sys/cygwin.h>
+#endif
+
+
+namespace quickbook { namespace detail
+{
+    void validate(boost::any& v,
+            const std::vector<std::string>& values,
+            input_path*, int)
+    {
+        std::string path
+            = boost::program_options::validators::get_single_string(values);
+
+#if !(defined(__cygwin__) || defined(__CYGWIN__))
+        v = input_path(path);
+#elif defined(BOOST_WINDOWS_PATH)
+        char result[MAX_PATH + 1];
+        cygwin_conv_to_win32_path(path.c_str(), result);
+        v = input_path(result);
+#elif defined(BOOST_POSIX_PATH)
+        char result[MAX_PATH + 1];
+        cygwin_conv_to_posix_path(path.c_str(), result);
+        v = input_path(result);
+#else
+#    error "Bosot filesystem path type doesn't seem to be set."
+#endif
+    }
+}}