Tools: replace header guard with pragma once

Tools/ArduPPM/Libraries/PPM_Encoder.h

@@ -147,9 +147,7 @@
 //         - ppm_encoder_init() will now make sure PPM output always starts with fail-safe (900us) value on throttle after a brown-out reset
 
 // -------------------------------------------------------------
-
-#ifndef _PPM_ENCODER_H_
-#define _PPM_ENCODER_H_
+#pragma once
 
 #include <avr/io.h>
 
@@ -1055,6 +1053,3 @@ void ppm_encoder_init( void )
     }
 }
 // ------------------------------------------------------------------------------
-
-#endif // _PPM_ENCODER_H_
-

Tools/ArduPPM/Libraries/PPM_Encoder_v3.h

@@ -14,9 +14,7 @@
 // -------------------------------------------------------------
 
 // Not for production - Work in progress
-
-#ifndef _PPM_ENCODER_H_
-#define _PPM_ENCODER_H_
+#pragma once
 
 #include <avr/io.h>
 #include <avr/interrupt.h>
@@ -1474,6 +1472,3 @@ void ppm_encoder_init( void )
 	
 }
 // ------------------------------------------------------------------------------
-
-#endif // _PPM_ENCODER_H_
-

Tools/Linux_HAL_Essentials/pru/pwmpru/linux_types.h

@@ -1,5 +1,4 @@
-#ifndef LINUX_TYPES_H
-#define LINUX_TYPES_H
+#pragma once
 
 #include <stdint.h>
 
@@ -14,6 +13,3 @@ typedef uint32_t u32;
 typedef uint64_t u64;
 
 #define __packed __attribute__((packed))
-
-
-#endif

Tools/Linux_HAL_Essentials/pru/pwmpru/pru_defs.h

@@ -1,5 +1,4 @@
-#ifndef PRU_DEFS_H
-#define PRU_DEFS_H
+#pragma once
 
 volatile register unsigned int __R31;
 volatile register unsigned int __R30;
@@ -645,5 +644,3 @@ static inline void pru_other_and_or_reg(u16 reg, u32 andmsk, u32 ormsk)
 }
 
 #endif
-
-#endif

Tools/Linux_HAL_Essentials/pru/pwmpru/prucomm.h

@@ -2,8 +2,7 @@
  * prucomm.h - structure definitions for communication
  *
  */
-#ifndef PRUCOMM_H
-#define PRUCOMM_H
+#pragma once
 
 #include "pru_defs.h"
 
@@ -71,5 +70,3 @@ struct cxt {
 
 /* the command is at the start of shared DPRAM */
 #define PWM_CMD		((volatile struct pwm_cmd *)DPRAM_SHARED)
-
-#endif

Tools/Linux_HAL_Essentials/pru/rcinpru/linux_types.h

@@ -1,5 +1,4 @@
-#ifndef LINUX_TYPES_H
-#define LINUX_TYPES_H
+#pragma once
 
 #include <stdint.h>
 
@@ -14,6 +13,3 @@ typedef uint32_t u32;
 typedef uint64_t u64;
 
 #define __packed __attribute__((packed))
-
-
-#endif

Tools/Linux_HAL_Essentials/pru/rcinpru/pru_defs.h

@@ -1,5 +1,4 @@
-#ifndef PRU_DEFS_H
-#define PRU_DEFS_H
+#pragma once
 
 volatile register unsigned int __R31;
 volatile register unsigned int __R30;
@@ -645,5 +644,3 @@ static inline void pru_other_and_or_reg(u16 reg, u32 andmsk, u32 ormsk)
 }
 
 #endif
-
-#endif

Tools/Linux_HAL_Essentials/pru/rcinpru/prucomm.h

@@ -2,8 +2,7 @@
  * prucomm.h - structure definitions for communication
  *
  */
-#ifndef PRUCOMM_H
-#define PRUCOMM_H
+#pragma once
 
 #include "pru_defs.h"
 
@@ -23,5 +22,3 @@ struct ring_buffer {
 
 /* the command is at the start of shared DPRAM */
 #define RBUFF        ((volatile struct ring_buffer *)DPRAM_SHARED)
-
-#endif

Tools/Replay/DataFlashFileReader.h

@@ -1,5 +1,4 @@
-#ifndef REPLAY_DATAFLASHREADER_H
-#define REPLAY_DATAFLASHREADER_H
+#pragma once
 
 #include <DataFlash/DataFlash.h>
 
@@ -20,5 +19,3 @@ protected:
 #define LOGREADER_MAX_FORMATS 255 // must be >= highest MESSAGE
     struct log_Format formats[LOGREADER_MAX_FORMATS] {};
 };
-
-#endif

Tools/Replay/LR_MsgHandler.h

@@ -1,5 +1,4 @@
-#ifndef AP_LR_MSGHANDLER_H
-#define AP_LR_MSGHANDLER_H
+#pragma once
 
 #include "MsgHandler.h"
 
@@ -414,6 +413,3 @@ public:
 private:
     Vector3f &sim_attitude;
 };
-
-
-#endif

Tools/Replay/MsgHandler.h

@@ -1,5 +1,4 @@
-#ifndef AP_MSGHANDLER_H
-#define AP_MSGHANDLER_H
+#pragma once
 
 #include <DataFlash/DataFlash.h>
 #include "VehicleType.h"
@@ -152,5 +151,3 @@ inline void MsgHandler::field_value_for_type_at_offset(uint8_t *msg,
         exit(1);
     }
 }
-
-#endif

Tools/Replay/Parameters.h

@@ -1,7 +1,5 @@
 // -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
-
-#ifndef PARAMETERS_H
-#define PARAMETERS_H
+#pragma once
 
 #include <AP_Common/AP_Common.h>
 
@@ -23,5 +21,3 @@ public:
 };
 
 extern const AP_Param::Info var_info[];
-
-#endif // PARAMETERS_H

Tools/Replay/VehicleType.h

@@ -1,5 +1,4 @@
-#ifndef AP_VEHICLETYPE_H
-#define AP_VEHICLETYPE_H
+#pragma once
 
 class VehicleType {
 public:
@@ -10,5 +9,3 @@ public:
         VEHICLE_ROVER
     };
 };
-
-#endif