ftclient: compile as C, cleanup

1 files changed, 151 insertions, 0 deletions

diff --git a/freetrackclient/freetrackclient.c b/freetrackclient/freetrackclient.c
new file mode 100644
index 00000000..007d073f
--- /dev/null
+++ b/freetrackclient/freetrackclient.c
@@ -0,0 +1,151 @@
+/***********************************************************************************
+ * * FTTypes            FTTypes contains the specific type definitions for the      *
+ * *                    FreeTrack protocol.                                         *
+ * *                    It was loosely translated from FTTypes.pas                  *
+ * *                    which was created by the FreeTrack-team.                    *
+ * *                                                                                *
+ * * Wim Vriend (Developing)                                                        *
+ * * Ron Hendriks (Testing and Research)                                            *
+ * *                                                                                *
+ * * Homepage               <http://facetracknoir.sourceforge.net/home/default.htm> *
+ * *                                                                                *
+ * * 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.                                           *
+ * *                                                                                *
+ * *                                                                                *
+ * * The FreeTrackClient sources were translated from the original Delphi sources   *
+ * * created by the FreeTrack developers.                                           *
+ */
+#define	NP_AXIS_MAX				16383
+
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <windows.h>
+
+#include "ftnoir_protocol_ft/fttypes.h"
+
+#define FT_EXPORT(t) __declspec(dllexport) t __stdcall
+
+FT_EXPORT(bool) FTCreateMapping(void);
+
+#if 0
+static FILE *debug_stream = fopen("c:\\FreeTrackClient.log", "a");
+#define dbg_report(...) if (debug_stream) { fprintf(debug_stream, __VA_ARGS__); fflush(debug_stream); }
+#else
+#define dbg_report(...) ((void)0)
+#endif
+
+static HANDLE hFTMemMap = 0;
+static FTHeap *pMemData = 0;
+static HANDLE hFTMutex = 0;
+static const char* dllVersion = "1.0.0.0";
+static const char* dllProvider = "FreeTrack";
+
+BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
+{
+    switch (fdwReason) {
+		case DLL_PROCESS_ATTACH:
+#ifdef WIN64
+		    dbg_report("\n= WIN64 =========================================================================================\n");
+#else
+		    dbg_report("\n= WIN32 =========================================================================================\n");
+#endif
+			dbg_report("DllMain: (0x%p, %d, %p)\n", hinstDLL, fdwReason, lpvReserved);
+            dbg_report("DllMain: Attach request\n");
+            DisableThreadLibraryCalls(hinstDLL);
+            break;
+
+		case DLL_PROCESS_DETACH:
+			dbg_report("DllMain: Detach\n");
+			dbg_report("DllMain: (0x%p, %d, %p)\n", hinstDLL, fdwReason, lpvReserved);
+		    dbg_report("==========================================================================================\n");
+            break;
+    }
+    return TRUE;
+}
+
+FT_EXPORT(bool) FTGetData(FTData* data)
+{
+//  dbg_report("NP_GetData called.");
+  if (FTCreateMapping() == false)
+      return false;
+
+  if (hFTMutex && WaitForSingleObject(hFTMutex, 16) == WAIT_OBJECT_0) {
+	if (pMemData) {
+		if (pMemData->data.DataID > (1 << 29)) {
+			pMemData->data.DataID = 0;
+		}
+		data->DataID = pMemData->data.DataID;
+	}
+	ReleaseMutex(hFTMutex);
+  }
+  return true;
+}
+
+// For some mysterious reason, the previously existing function FTReportID has been changed to FTReportName, but with an integer as argument.
+// The Delphi-code from the FreeTrack repo suggest a char * as argument, so it cost me an afternoon to figure it out (and keep ArmA2 from crashing).
+// Thanks guys!
+//
+FT_EXPORT(void) FTReportName( int name )
+{
+	dbg_report("FTReportName request (ID = %d).\n", name);
+}
+
+FT_EXPORT(const char*) FTGetDllVersion(void)
+{
+    dbg_report("FTGetDllVersion request.\n");
+
+	return dllVersion;
+}
+
+FT_EXPORT(const char*) FTProvider(void)
+{
+    dbg_report("FTProvider request.\n");
+
+	return dllProvider;
+}
+
+//
+// Create a memory-mapping to the Freetrack data.
+// It contains the tracking data, a handle to the main-window and the program-name of the Game!
+//
+//
+FT_EXPORT(bool) FTCreateMapping(void)
+{
+	if ( pMemData != NULL ) {
+		return true;
+	}
+
+    dbg_report("FTCreateMapping request (pMemData == NULL).\n");
+
+	hFTMemMap = CreateFileMappingA( INVALID_HANDLE_VALUE , 00 , PAGE_READWRITE , 0 , 
+		                           sizeof( FTHeap ), 
+								   (LPCSTR) FT_MM_DATA );
+
+    if (hFTMemMap == NULL)
+    {
+        pMemData = NULL;
+        return false;
+    }
+
+    pMemData = (FTHeap*) MapViewOfFile(hFTMemMap, FILE_MAP_WRITE, 0, 0, sizeof( FTHeap ) );
+    hFTMutex = CreateMutexA(NULL, false, FREETRACK_MUTEX);
+
+	return true;
+}
+
+FT_EXPORT(void) FTDestroyMapping(void)
+{
+	if ( pMemData != NULL ) {
+		UnmapViewOfFile ( pMemData );
+	}
+	
+	CloseHandle( hFTMutex );
+	CloseHandle( hFTMemMap );
+	pMemData = 0;
+	hFTMemMap = 0;
+}