AP_GPS: move constructor and complex accessors to cpp file

These functions are slightly long and make the .h file hard to read.  Also saves a small amount of flash space.
No functional change

libraries/AP_GPS/AP_GPS.cpp

@@ -242,6 +242,12 @@ const AP_Param::GroupInfo AP_GPS::var_info[] = {
     AP_GROUPEND
 };
 
+// constructor
+AP_GPS::AP_GPS()
+{
+    AP_Param::setup_object_defaults(this, var_info);
+}
+
 /// Startup initialisation.
 void AP_GPS::init(DataFlash_Class *dataflash, const AP_SerialManager& serial_manager)
 {
@@ -266,10 +272,48 @@ void AP_GPS::init(DataFlash_Class *dataflash, const AP_SerialManager& serial_man
 
 // baudrates to try to detect GPSes with
 const uint32_t AP_GPS::_baudrates[] = {4800U, 19200U, 38400U, 115200U, 57600U, 9600U, 230400U};
+// return number of active GPS sensors. Note that if the first GPS
+// is not present but the 2nd is then we return 2. Note that a blended
+// GPS solution is treated as an additional sensor.
+uint8_t AP_GPS::num_sensors(void) const
+{
+    if (!_output_is_blended) {
+        return num_instances;
+    } else {
+        return num_instances+1;
+    }
+}
 
 // initialisation blobs to send to the GPS to try to get it into the
 // right mode
 const char AP_GPS::_initialisation_blob[] = UBLOX_SET_BINARY MTK_SET_BINARY SIRF_SET_BINARY;
+bool AP_GPS::speed_accuracy(uint8_t instance, float &sacc) const
+{
+    if (state[instance].have_speed_accuracy) {
+        sacc = state[instance].speed_accuracy;
+        return true;
+    }
+    return false;
+}
+
+bool AP_GPS::horizontal_accuracy(uint8_t instance, float &hacc) const
+{
+    if (state[instance].have_horizontal_accuracy) {
+        hacc = state[instance].horizontal_accuracy;
+        return true;
+    }
+    return false;
+}
+
+bool AP_GPS::vertical_accuracy(uint8_t instance, float &vacc) const
+{
+    if (state[instance].have_vertical_accuracy) {
+        vacc = state[instance].vertical_accuracy;
+        return true;
+    }
+    return false;
+}
+
 
 /**
    convert GPS week and milliseconds to unix epoch in milliseconds
@@ -996,6 +1040,17 @@ float AP_GPS::get_lag(uint8_t instance) const
     }
 }
 
+// return a 3D vector defining the offset of the GPS antenna in meters relative to the body frame origin
+const Vector3f &AP_GPS::get_antenna_offset(uint8_t instance) const
+{
+    if (instance == GPS_MAX_RECEIVERS) {
+        // return an offset for the blended GPS solution
+        return _blended_antenna_offset;
+    } else {
+        return _antenna_offset[instance];
+    }
+}
+
 /*
   return gps update rate in milliseconds
 */

libraries/AP_GPS/AP_GPS.h

@@ -46,10 +46,6 @@ class AP_GPS_Backend;
 class AP_GPS
 {
 public:
-    // constructor
-	AP_GPS() {
-		AP_Param::setup_object_defaults(this, var_info);
-    }
 
     /// Startup initialisation.
     void init(DataFlash_Class *dataflash, const AP_SerialManager& serial_manager);
@@ -58,6 +54,8 @@ public:
     /// This routine must be called periodically (typically at 10Hz or
     /// more) to process incoming data.
     void update(void);
+    // constructor
+	AP_GPS();
 
     // GPS driver types
     enum GPS_Type {
@@ -144,13 +142,7 @@ public:
     // return number of active GPS sensors. Note that if the first GPS
     // is not present but the 2nd is then we return 2. Note that a blended
     // GPS solution is treated as an additional sensor.
-    uint8_t num_sensors(void) const {
+    uint8_t num_sensors(void) const;
-        if (!_output_is_blended) {
-            return num_instances;
-        } else {
-            return num_instances+1;
-        }
-    }
 
     // Return the index of the primary sensor which is the index of the sensor contributing to
     // the output. A blended solution is available as an additional instance
@@ -177,38 +169,18 @@ public:
         return location(primary_instance);
     }
 
-    bool speed_accuracy(uint8_t instance, float &sacc) const {
+    // report speed accuracy
-        if(state[instance].have_speed_accuracy) {
+    bool speed_accuracy(uint8_t instance, float &sacc) const;
-            sacc = state[instance].speed_accuracy;
-            return true;
-        }
-        return false;
-    }
-
     bool speed_accuracy(float &sacc) const {
         return speed_accuracy(primary_instance, sacc);
     }
 
-    bool horizontal_accuracy(uint8_t instance, float &hacc) const {
+    bool horizontal_accuracy(uint8_t instance, float &hacc) const;
-        if(state[instance].have_horizontal_accuracy) {
-            hacc = state[instance].horizontal_accuracy;
-            return true;
-        }
-        return false;
-    }
-
     bool horizontal_accuracy(float &hacc) const {
         return horizontal_accuracy(primary_instance, hacc);
     }
 
-    bool vertical_accuracy(uint8_t instance, float &vacc) const {
+    bool vertical_accuracy(uint8_t instance, float &vacc) const;
-        if(state[instance].have_vertical_accuracy) {
-            vacc = state[instance].vertical_accuracy;
-            return true;
-        }
-        return false;
-    }
-
     bool vertical_accuracy(float &vacc) const {
         return vertical_accuracy(primary_instance, vacc);
     }
@@ -332,14 +304,7 @@ public:
     uint16_t get_rate_ms(uint8_t instance) const;
 
     // return a 3D vector defining the offset of the GPS antenna in meters relative to the body frame origin
-    const Vector3f &get_antenna_offset(uint8_t instance) const {
+    const Vector3f &get_antenna_offset(uint8_t instance) const;
-        if (instance == GPS_MAX_RECEIVERS) {
-            // return an offset for the blended GPS solution
-            return _blended_antenna_offset;
-        } else {
-            return _antenna_offset[instance];
-        }
-    }
 
     // set position for HIL
     void setHIL(uint8_t instance, GPS_Status status, uint64_t time_epoch_ms,