add gettimeofday() compatibility function for windows

plugins that need that:
  - remotesink
  - remotesource

CMakeLists.txt

@@ -145,6 +145,10 @@ set(INSTALL_PLUGINS_DIR "${INSTALL_LIB_DIR}/plugins")
 set(INSTALL_PLUGINSSRV_DIR "${INSTALL_LIB_DIR}/pluginssrv")
 set(EXTERNAL_BUILD_LIBRARIES "${CMAKE_BINARY_DIR}/external")
 
+# custom libraries
+set(CUSTOM_APPLE_INCLUDE "${CMAKE_SOURCE_DIR}/custom/apple" CACHE INTERNAL "")
+set(CUSTOM_WINDOWS_INCLUDE "${CMAKE_SOURCE_DIR}/custom/windows" CACHE INTERNAL "")
+
 if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
   set(LINUX TRUE)
   # populate distribution name

custom/windows/windows_time.h

@@ -0,0 +1,44 @@
+#if (defined _WIN32_) || (defined _MSC_VER)
+
+/*
+ * missing gettimeofday implementation
+ * for windows; based on postgresql
+ */
+
+#ifndef CUSTOM_WINDOWS_TIME_H_
+#define CUSTOM_WINDOWS_TIME_H_
+
+#define _WINSOCKAPI_    // stops windows.h including winsock.h; timeval redefine
+#include <Windows.h>
+#include <stdint.h> // portable: uint64_t   MSVC: __int64 
+
+// MSVC defines this in winsock2.h!?
+typedef struct timeval {
+    long tv_sec;
+    long tv_usec;
+} timeval;
+
+int gettimeofday(struct timeval * tp, struct timezone * tzp)
+{
+    // Note: some broken versions only have 8 trailing zero's, the correct epoch has 9 trailing zero's
+    // This magic number is the number of 100 nanosecond intervals since January 1, 1601 (UTC)
+    // until 00:00:00 January 1, 1970 
+    static const uint64_t EPOCH = ((uint64_t) 116444736000000000ULL);
+
+    SYSTEMTIME  system_time;
+    FILETIME    file_time;
+    uint64_t    time;
+
+    GetSystemTime( &system_time );
+    SystemTimeToFileTime( &system_time, &file_time );
+    time =  ((uint64_t)file_time.dwLowDateTime )      ;
+    time += ((uint64_t)file_time.dwHighDateTime) << 32;
+
+    tp->tv_sec  = (long) ((time - EPOCH) / 10000000L);
+    tp->tv_usec = (long) (system_time.wMilliseconds * 1000);
+    return 0;
+}
+
+
+#endif // CUSTOM_WINDOWS_TIME_H_
+#endif // _WIN32_

fcdhid/CMakeLists.txt

@@ -7,7 +7,6 @@ set(fcdhid_SOURCES
 )
 
 set(fcdhid_HEADERS
-    	../custom/apple/apple_compat.h
 	fcdhid.h
 	hid-libusb.h
 	hidapi.h
@@ -16,6 +15,7 @@ set(fcdhid_HEADERS
 include_directories(
         ${LIBUSB_INCLUDE_DIR}
         ${ICONV_INCLUDE_DIR}
+        ${CUSTOM_APPLE_INCLUDE}
 )
 
 add_library(fcdhid SHARED

fcdhid/hid-libusb.c

@@ -69,9 +69,7 @@ extern "C" {
  * MacOS does not implement POSIX Thread Barriers
  */
 #ifdef __APPLE__
-
-#include "../custom/apple/apple_compat.h"
-
+#include "apple_compat.h"
 #endif
 
 /* Uncomment to enable the retrieval of Usage and Usage Page in

plugins/channelrx/remotesink/CMakeLists.txt

@@ -27,6 +27,7 @@ include_directories(
     ${CMAKE_SOURCE_DIR}/swagger/sdrangel/code/qt5/client
     ${Boost_INCLUDE_DIRS}
     ${CM256CC_INCLUDE_DIR}
+    ${CUSTOM_WINDOWS_INCLUDE}
 )
 
 if(NOT SERVER_MODE)

plugins/channelrx/remotesink/remotesink.cpp

@@ -23,8 +23,13 @@
 
 #include "remotesink.h"
 
+#if (defined _WIN32_) || (defined _MSC_VER)
+#include "windows_time.h"
+#include <stdint.h>
+#else
 #include <sys/time.h>
 #include <unistd.h>
+#endif
 #include <boost/crc.hpp>
 #include <boost/cstdint.hpp>
 

plugins/channeltx/remotesource/CMakeLists.txt

@@ -27,6 +27,7 @@ include_directories(
     ${CMAKE_SOURCE_DIR}/swagger/sdrangel/code/qt5/client
     ${Boost_INCLUDE_DIRS}
     ${CM256CC_INCLUDE_DIR}
+    ${CUSTOM_WINDOWS_INCLUDE}
 )
 
 if(NOT SERVER_MODE)

plugins/channeltx/remotesource/remotesource.cpp

@@ -17,8 +17,13 @@
 
 #include "remotesource.h"
 
+#if (defined _WIN32_) || (defined _MSC_VER)
+#include "windows_time.h"
+#include <stdint.h>
+#else
 #include <sys/time.h>
 #include <unistd.h>
+#endif
 #include <boost/crc.hpp>
 #include <boost/cstdint.hpp>
 

qrtplib/rtptimeutilities.h

@@ -61,7 +61,7 @@
 #endif // RTP_HAVE_VSUINT64SUFFIX
 
 #ifdef __APPLE__
-#include   "../custom/apple/apple_compat.h"
+#include "../custom/apple/apple_compat.h"
 #endif
 
 namespace qrtplib