Pull lengthof definition into a different header.

include/helpers/lengthof.h

@@ -0,0 +1,37 @@
+/* Copyright 2015, Michele Santullo
+ * This file is part of "dindexer".
+ *
+ * "dindexer" is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * "dindexer" is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with "dindexer".  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef id19B690A53A9546D5BD95D89FFF388283
+#define id19B690A53A9546D5BD95D89FFF388283
+
+#if defined(__cplusplus)
+#	include <cstddef>
+#else
+#	include <stddef.h>
+#endif
+
+#if defined(lengthof)
+#	undef lengthof
+#endif
+//http://stackoverflow.com/questions/4415524/common-array-length-macro-for-c#4415646
+#if defined(__cplusplus)
+#	define lengthof(x) ((sizeof(x)/sizeof(0[x])) / ((std::size_t)(!(sizeof(x) % sizeof(0[x])))))
+#else
+#	define lengthof(x) ((sizeof(x)/sizeof(0[x])) / ((size_t)(!(sizeof(x) % sizeof(0[x])))))
+#endif
+
+#endif

src/update/commandline.cpp

@@ -17,6 +17,7 @@
 
 #include "commandline.hpp"
 #include "dindexerConfig.h"
+#include "helpers/lengthof.h"
 #include <boost/program_options.hpp>
 #include <iostream>
 #include <algorithm>
@@ -24,12 +25,6 @@
 #define STRINGIZE_IMPL(s) #s
 #define STRINGIZE(s) STRINGIZE_IMPL(s)
 
-#if defined(lengthof)
-#	undef lengthof
-#endif
-//http://stackoverflow.com/questions/4415524/common-array-length-macro-for-c#4415646
-#define lengthof(x) ((sizeof(x)/sizeof(0[x])) / ((std::size_t)(!(sizeof(x) % sizeof(0[x])))))
-
 namespace po = boost::program_options;
 
 namespace din {