Sketch emulation on host (#5342)

* WIP compile examples on host with 'make examples'

* WIP bufferize tcp input

* WIP Makefile

* WIP network to rework, tcp/udp to factorize, udp addresses broken

* minor changes to the core

* WIP basic udp working

* WIP mdns

* WIP mcast receiving, not sending

* WIP mdns OK

* beta version

* SSL + doc

* update travis host test command

* licenses

* typo

* doc: arduino builder is not around: declare functions before calling them

* fix with latest SSL PR, compile in 32 bits mode

* fix make clean

* make -m32 optional

* 32bits compiler ability tester

* WIP

* WIP (fix 1 vtable error, still another one to hunt with using spiffs)

* example astyle

* fix os_printf_plus

* load / save mock spiffs

* fix style

* fix using spiffs/mock

* don't mess ram

* update doc

* remove leftover

* optimization -Os except for CI, rename ARCH32 to FORCE32

* revert useless cast (not even compiled)

* remove unused function

* use proper type for pointer arithmetics

* makefile: sketch object and cpp file moved to bin/ directories
easier to clean, and IDE don't like them

* changes for review

* make use of %zd

* less verbose makefile by default (option)

* update readme

tests/host/common/mock.h

@@ -0,0 +1,121 @@
+/*
+ Arduino emulation - common to all emulated code
+ Copyright (c) 2018 david gauchard. All rights reserved.
+
+ Permission is hereby granted, free of charge, to any person obtaining a
+ copy of this software and associated documentation files (the "Software"),
+ to deal with the Software without restriction, including without limitation
+ the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ and/or sell copies of the Software, and to permit persons to whom the
+ Software is furnished to do so, subject to the following conditions:
+
+ - Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimers.
+
+ - Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimers in the
+   documentation and/or other materials provided with the distribution.
+
+ - The names of its contributors may not be used to endorse or promote
+   products derived from this Software without specific prior written
+   permission.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ THE CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ DEALINGS WITH THE SOFTWARE.
+*/
+
+// include host's STL before any other include file
+// because core definition like max() is in the way
+
+#ifdef __cplusplus
+#include <vector>
+#endif
+
+// exotic typedefs used in the sdk
+
+#include <stdint.h>
+typedef uint8_t uint8;
+typedef uint32_t uint32;
+
+//
+
+#include <Arduino.h>
+
+//
+
+#include <stdlib.h>
+#define RANDOM_REG32 ((uint32_t)random())
+
+// net tweak
+
+// htontoh code in common/MockTools.cpp
+#define LWIP_DONT_PROVIDE_BYTEORDER_FUNCTIONS
+#undef INADDR_NONE
+
+//
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+int ets_printf (const char* fmt, ...) __attribute__ ((format (printf, 1, 2)));
+#define os_printf_plus printf
+
+extern const char* host_interface; // cmdline parameter
+
+#define NO_GLOBAL_BINDING 0xffffffff
+extern uint32_t global_ipv4_netfmt; // selected interface addresse to bind to
+
+#ifdef __cplusplus
+}
+#endif
+
+//
+
+#ifdef __cplusplus
+
+#ifndef CCBUFSIZE
+#define CCBUFSIZE 8192
+#endif
+
+// tcp
+int    mockConnect   (uint32_t addr, int& sock, int port);
+size_t mockFillInBuf (int sock, char* ccinbuf, size_t& ccinbufsize);
+size_t mockPeekBytes (int sock, char* dst, size_t size, int timeout_ms, char* buf, size_t& bufsize);
+size_t mockRead      (int sock, char* dst, size_t size, int timeout_ms, char* buf, size_t& bufsize);
+size_t mockWrite     (int sock, const uint8_t* data, size_t size, int timeout_ms);
+int serverAccept (int sock);
+
+// udp
+int mockUDPSocket ();
+bool mockUDPListen (int sock, uint32_t dstaddr, uint16_t port, uint32_t mcast = 0);
+size_t mockUDPFillInBuf (int sock, char* ccinbuf, size_t& ccinbufsize, uint8_t& addrsize, uint8_t addr[16], uint16_t& port);
+size_t mockUDPPeekBytes (int sock, char* dst, size_t usersize, int timeout_ms, char* ccinbuf, size_t& ccinbufsize);
+size_t mockUDPRead (int sock, char* dst, size_t size, int timeout_ms, char* ccinbuf, size_t& ccinbufsize);
+size_t mockUDPWrite (int sock, const uint8_t* data, size_t size, int timeout_ms, uint32_t ipv4, uint16_t port);
+
+class UdpContext;
+void register_udp (int sock, UdpContext* udp = nullptr);
+
+class InterruptLock { };
+
+//
+
+#define CORE_MOCK 1
+
+#define ARDUINO 267
+#define ESP8266 1
+#define A0 0
+#define LED_BUILTIN 0
+#define F_CPU 80000000
+#define LWIP_OPEN_SRC
+#define TCP_MSS 536
+#define LWIP_FEATURES 1
+
+//
+
+#endif // __cplusplus