From 259ede3d5bbcfbff619139c9fee88605f5a066ab Mon Sep 17 00:00:00 2001
From: "H. Utku Maden" <utkumaden@hotmail.com>
Date: Sun, 16 May 2021 10:31:06 +0300
Subject: [PATCH] Put C++ header guard and add extern to function declarations.

---
 include/bmx280.h | 26 ++++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/include/bmx280.h b/include/bmx280.h
index 77b1fda..403a10b 100644
--- a/include/bmx280.h
+++ b/include/bmx280.h
@@ -10,11 +10,17 @@
 #ifndef _BMX280_H_
 #define _BMX280_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <stdint.h>
 #include <limits.h>
 #include "driver/i2c.h"
 #include "sdkconfig.h"
 
+#define BMXAPI extern
+
 /**
  * Anonymous structure to driver settings.
  */
@@ -27,43 +33,43 @@ typedef struct bmx280_t bmx280_t;
  * @param port The I2C port to use.
  * @return A non-null pointer to the driver structure on success.
  */
-bmx280_t* bmx280_create(i2c_port_t port);
+BMXAPI bmx280_t* bmx280_create(i2c_port_t port);
 /**
  * Destroy your the instance.
  * @param bmx280 The instance to destroy.
  */
-void bmx280_close(bmx280_t* bmx280);
+BMXAPI void bmx280_close(bmx280_t* bmx280);
 
 /**
  * Probe for the sensor and read calibration data.
  * @param bmx280 Driver structure.
  */
-esp_err_t bmx280_init(bmx280_t* bmx280);
+BMXAPI esp_err_t bmx280_init(bmx280_t* bmx280);
 /**
  * Configure the sensor with the given parameters.
  * @param bmx280 Driver structure.
  * @param configuration The configuration to use.
  */
-esp_err_t bmx280_configure(bmx280_t* bmx280, bmx280_config_t *cfg);
+BMXAPI esp_err_t bmx280_configure(bmx280_t* bmx280, bmx280_config_t *cfg);
 
 /**
  * Set the sensor mode of operation.
  * @param bmx280 Driver structure.
  * @param mode The mode to set the sensor to.
  */
-esp_err_t bmx280_setMode(bmx280_t* bmx280, bmx280_mode_t mode);
+BMXAPI esp_err_t bmx280_setMode(bmx280_t* bmx280, bmx280_mode_t mode);
 /**
  * Get the sensor current mode of operation.
  * @param bmx280 Driver structure.
  * @param mode Pointer to write current mode to.
  */
-esp_err_t bmx280_getMode(bmx280_t* bmx280, bmx280_mode_t* mode);
+BMXAPI esp_err_t bmx280_getMode(bmx280_t* bmx280, bmx280_mode_t* mode);
 
 /**
  * Returns true if sensor is currently sampling environment conditions.
  * @param bmx280 Driver structure.
  */
-bool bmx280_isSampling(bmx280_t* bmx280);
+BMXAPI bool bmx280_isSampling(bmx280_t* bmx280);
 
 /**
  * Read sensor values as fixed point numbers.
@@ -72,7 +78,7 @@ bool bmx280_isSampling(bmx280_t* bmx280);
  * @param pressure The pressure in Pa (1/256 Pa increments)
  * @param humidity The humidity in %RH (1/1024 %RH increments) (UINT32_MAX when invlaid.)
  */
-esp_err_t bmx280_readout(bmx280_t *bmx280, int32_t *temperature, uint32_t *pressure, uint32_t *humidity);
+BMXAPI esp_err_t bmx280_readout(bmx280_t *bmx280, int32_t *temperature, uint32_t *pressure, uint32_t *humidity);
 
 /**
  * Convert sensor readout to floating point values.
@@ -113,4 +119,8 @@ static inline esp_err_t bmx280_readoutFloat(bmx280_t *bmx280, float* temperature
     return err;
 }
 
+#ifdef __cplusplus
+};
+#endif
+
 #endif