Many serialization and related stuff improvements

Fix bug in array-like containers serialization which could cause almost infinite
  loop on malformed input
Implement VLQ integer serialization
Unify sequence containers serialization code
Add support for VLQ serialization also for string size
Use VLQ compression for file links
Add templated function to fix endiannes for all integer types
Use bitset to print flags in binary form
Unify serialization code for integral types
Serialize 64bit integers types to JSON object with both string and integer
  representation, so it is posible to have this representation also for
  containers types like std::vetor or std::map this breaks retrocompatibility
  but is necessary to support clients written in languages which doesn't have
  64 bit integers support such as JavaScript or Dart

libretroshare/src/util/rsdebug.h

@@ -107,6 +107,10 @@ struct t_RsLogger
 		                 << std::setfill('0') << std::setw(3) << msec.count()
 		                 << std::setfill(tFill) << " " << val;
 	}
+
+	/// needed for manipulators and things like std::endl
+	stream_type& operator<<(std::ostream& (*pf)(std::ostream&))
+	{ return std::cerr << pf; }
 };
 #endif // def __ANDROID__
 

libretroshare/src/util/rsendian.h

@@ -0,0 +1,59 @@
+/*******************************************************************************
+ *                                                                             *
+ * libretroshare base64 encoding utilities                                     *
+ *                                                                             *
+ * Copyright (C) 2020  Gioacchino Mazzurco <gio@eigenlab.org>                  *
+ * Copyright (C) 2020  Asociación Civil Altermundi <info@altermundi.net>       *
+ *                                                                             *
+ * This program is free software: you can redistribute it and/or modify        *
+ * it under the terms of the GNU Lesser General Public License as              *
+ * published by the Free Software Foundation, either version 3 of the          *
+ * License, or (at your option) any later version.                             *
+ *                                                                             *
+ * This program 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 Lesser General Public License for more details.                         *
+ *                                                                             *
+ * You should have received a copy of the GNU Lesser General Public License    *
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.       *
+ *                                                                             *
+ *******************************************************************************/
+#pragma once
+
+/**
+ * @file
+ * This file provide convenient integer endiannes conversion utilities.
+ * Instead of providing them with different names for each type (a la C htonl,
+ * htons, ntohl, ntohs ), which make them uncomfortable to use, expose a
+ * templated function `rs_endian_fix` to reorder integers representation byets
+ * when sending or receiving from the network. */
+
+/* enforce LITTLE_ENDIAN on Windows */
+#ifdef WINDOWS_SYS
+#	define BYTE_ORDER  1234
+#	define LITTLE_ENDIAN 1234
+#	define BIG_ENDIAN  4321
+#else
+#include <arpa/inet.h>
+#endif
+
+template<typename INTTYPE> inline INTTYPE rs_endian_fix(INTTYPE val)
+{
+#if BYTE_ORDER == LITTLE_ENDIAN
+	INTTYPE swapped = 0;
+	for (size_t i = 0; i < sizeof(INTTYPE); ++i)
+		swapped |= (val >> (8*(sizeof(INTTYPE)-i-1)) & 0xFF) << (8*i);
+	return swapped;
+#else
+	return hostI;
+#endif
+};
+
+#ifndef BYTE_ORDER
+#	error "ENDIAN determination Failed (BYTE_ORDER not defined)"
+#endif
+
+#if !(BYTE_ORDER == BIG_ENDIAN || BYTE_ORDER == LITTLE_ENDIAN)
+#	error "ENDIAN determination Failed (unkown BYTE_ORDER value)"
+#endif