// net_fdm_mini.hxx -- defines a simple subset I/O interface to the flight
// dynamics model variables
//
-// Written by Curtis Olson - curt@flightgear.com, started January 2002.
+// Written by Curtis Olson - http://www.flightgear.org/~curt
+// Started January 2002.
//
// This file is in the Public Domain, and comes with no warranty.
//
# error This library requires C++
#endif
+#include <simgear/misc/stdint.hxx>
-const int FG_NET_FDM_MINI_VERSION = 1;
+// NOTE: this file defines an external interface structure. Due to
+// variability between platforms and architectures, we only used fixed
+// length types here. Specifically, integer types can vary in length.
+// I am not aware of any platforms that don't use 4 bytes for float
+// and 8 bytes for double.
+
+
+const uint32_t FG_NET_FDM_MINI_VERSION = 2;
// Define a structure containing the top level flight dynamics model
FG_MAX_TANKS = 4
};
- int version; // increment when data values change
- int pad; // keep doubles 64-bit aligned for some
- // hardware platforms, such as the Sun
- // SPARC, which don't like misaligned
- // data
+ uint32_t version; // increment when data values change
// Positions
double longitude; // geodetic (radians)
double climb_rate; // feet per second
// Consumables
- int num_tanks; // Max number of fuel tanks
+ uint32_t num_tanks; // Max number of fuel tanks
double fuel_quantity[FG_MAX_TANKS];
// Environment
- time_t cur_time; // current unix time
- long int warp; // offset in seconds to unix time
+ uint32_t cur_time; // current unix time
+ int32_t warp; // offset in seconds to unix time
};