Commit FS#8314. This adds strnat[case]cmp written by Martin Pool, which respects numbers within strings, and gives a more intuitive

sorting. This also adds a setting, so that the sorting can be used in the file browser. The implementation is very generic, and can possibly 
be used in other places.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20155 a1c6a512-1295-4272-9138-f99709370657

firmware/include/strnatcmp.h

@@ -0,0 +1,30 @@
+/* -*- mode: c; c-file-style: "k&r" -*-
+
+  strnatcmp.c -- Perform 'natural order' comparisons of strings in C.
+  Copyright (C) 2000, 2004 by Martin Pool <mbp sourcefrog net>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+
+/* CUSTOMIZATION SECTION
+ *
+ * You can change this typedef, but must then also change the inline
+ * functions in strnatcmp.c */
+
+int strnatcmp(const char *a, const char *b);
+int strnatcasecmp(const char *a, const char *b);