Make installed model info available from libxplanemp

include/XPMPMultiplayer.h

@@ -346,6 +346,25 @@ const char *	XPMPLoadCSLPackage(
  */
 void			XPMPLoadPlanesIfNecessary(void);
 
+/*
+ * XPMPGetNumberOfInstalledModels
+ *
+ * This routine returns the number of found models.
+ *
+ */
+int XPMPGetNumberOfInstalledModels(void);
+
+/*
+ * XPMPGetModelInfo
+ *
+ * Call this routine with an index to get all available info for this model. Valid
+ * index is between 0 and XPMPGetNumberOfInstalledModels(). If you pass an index
+ * out of this range, the out parameters are unchanged.
+ * Make sure the size of all char arrays is big enough.
+ *
+ */
+void XPMPGetModelInfo(int inIndex, const char **outModelName, const char **outIcao, const char **outAirline, const char **outLivery);
+
 /*
  * XPMPCreatePlane
  *

src/XPMPMultiplayer.cpp

@@ -44,6 +44,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <set>
+#include <cassert>
 
 // This prints debug info on our process of loading Austin's planes.
 #define	DEBUG_MANUAL_LOADING	0
@@ -281,6 +282,37 @@ void	XPMPLoadPlanesIfNecessary(void)
 
 }
 
+int XPMPGetNumberOfInstalledModels(void)
+{
+    int number = 0;
+    for (const auto& package : gPackages)
+    {
+        number += package.planes.size();
+    }
+    return number;
+}
+
+void XPMPGetModelInfo(int inIndex, const char** outModelName, const char** outIcao, const char** outAirline, const char** outLivery)
+{
+    int counter = 0;
+    for (const auto& package : gPackages)
+    {
+
+        if (counter + static_cast<int>(package.planes.size()) < inIndex + 1)
+        {
+            counter += package.planes.size();
+            continue;
+        }
+
+        int positionInPackage =  inIndex - counter;
+        *outModelName = package.planes[positionInPackage].modelName.c_str();
+        *outIcao = package.planes[positionInPackage].icao.c_str();
+        *outAirline = package.planes[positionInPackage].airline.c_str();
+        *outLivery = package.planes[positionInPackage].livery.c_str();
+        break;
+    }
+}
+
 /********************************************************************************
  * PLANE OBJECT SUPPORT
  ********************************************************************************/