Added playback example to C client

C/playbackExample/src/playback.c

@@ -0,0 +1,106 @@
+//Copyright (c) 2013-2015 United States Government as represented by the Administrator of the
+//National Aeronautics and Space Administration. All Rights Reserved.
+//
+//DISCLAIMERS
+//    No Warranty: THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF ANY KIND, 
+//    EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY THAT
+//    THE SUBJECT SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
+//    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY
+//    THAT THE SUBJECT SOFTWARE WILL BE ERROR FREE, OR ANY WARRANTY THAT DOCUMENTATION, IF PROVIDED,
+//    WILL CONFORM TO THE SUBJECT SOFTWARE. THIS AGREEMENT DOES NOT, IN ANY MANNER, CONSTITUTE AN
+//    ENDORSEMENT BY GOVERNMENT AGENCY OR ANY PRIOR RECIPIENT OF ANY RESULTS, RESULTING DESIGNS,
+//    HARDWARE, SOFTWARE PRODUCTS OR ANY OTHER APPLICATIONS RESULTING FROM USE OF THE SUBJECT
+//    SOFTWARE.  FURTHER, GOVERNMENT AGENCY DISCLAIMS ALL WARRANTIES AND LIABILITIES REGARDING
+//    THIRD-PARTY SOFTWARE, IF PRESENT IN THE ORIGINAL SOFTWARE, AND DISTRIBUTES IT "AS IS."
+//
+//    Waiver and Indemnity: RECIPIENT AGREES TO WAIVE ANY AND ALL CLAIMS AGAINST THE UNITED STATES
+//    GOVERNMENT, ITS CONTRACTORS AND SUBCONTRACTORS, AS WELL AS ANY PRIOR RECIPIENT.  IF
+//    RECIPIENT'S USE OF THE SUBJECT SOFTWARE RESULTS IN ANY LIABILITIES, DEMANDS, DAMAGES, EXPENSES
+//    OR LOSSES ARISING FROM SUCH USE, INCLUDING ANY DAMAGES FROM PRODUCTS BASED ON, OR RESULTING
+//    FROM, RECIPIENT'S USE OF THE SUBJECT SOFTWARE, RECIPIENT SHALL INDEMNIFY AND HOLD HARMLESS THE
+//    UNITED STATES GOVERNMENT, ITS CONTRACTORS AND SUBCONTRACTORS, AS WELL AS ANY PRIOR RECIPIENT,
+//    TO THE EXTENT PERMITTED BY LAW.  RECIPIENT'S SOLE REMEDY FOR ANY SUCH MATTER SHALL BE THE
+//    IMMEDIATE, UNILATERAL TERMINATION OF THIS AGREEMENT.
+
+#include "playback.h"
+
+#include "chrome.h"
+
+#include "xplaneConnect.h"
+
+#include <stdio.h>
+#include <time.h>
+
+#ifdef WIN32
+#include <Windows.h>
+#else
+#include <unistd.h>
+#endif
+
+void playbackSleep(int ms)
+{
+#ifdef WIN32
+	Sleep(ms);
+#else
+	uSleep(ms * 1000);
+#endif
+}
+
+void record(char* path, int interval, int duration)
+{
+	FILE* fd = fopen(path, "w");
+	int count = duration * 1000 / interval;
+	if (!fd)
+	{
+		displayMsg("Unable to open output file.");
+		return;
+	}
+	if (count < 1)
+	{
+		displayMsg("Duration is less than one iteration.");
+		return;
+	}
+	displayMsg("Recording...");
+
+	XPCSocket sock = openUDP("127.0.0.1");
+	for (int i = 0; i < count; ++i)
+	{
+		float posi[7];
+		int result = getPOSI(sock, posi, 0);
+		playbackSleep(interval);
+		if (result < 0)
+		{
+			continue;
+		}
+		fprintf(fd, "%f, %f, %f, %f, %f, %f, %f\n", posi[0], posi[1], posi[2], posi[3], posi[4], posi[5], posi[6]);
+	}
+	closeUDP(sock);
+	displayMsg("Recording Complete");
+}
+
+void playback(char* path, int interval)
+{
+	FILE* fd = fopen(path, "r");
+	if (!fd)
+	{
+		displayMsg("Unable to open output file.");
+		return;
+	}
+	displayMsg("Starting Playback...");
+
+	XPCSocket sock = openUDP("127.0.0.1");
+	float posi[7];
+	while (!feof(fd) && !ferror(fd))
+	{
+		int result = fscanf(fd, "%f, %f, %f, %f, %f, %f, %f\n",
+			&posi[0], &posi[1], &posi[2], &posi[3], &posi[4], &posi[5], &posi[6]);
+		playbackSleep(interval);
+		if (result != 7)
+		{
+			continue;
+		}		
+		sendPOSI(sock, posi, 7, 0);
+	}
+	closeUDP(sock);
+	displayMsg("Playback Complete");
+}