added bswaps for int16 and int32

Author: gigapod

src/sfTk/sfToolkit.cpp

@@ -8,7 +8,7 @@
  * @author SparkFun Electronics
  * @date 2024-2025
  * @copyright Copyright (c) 2024-2025, SparkFun Electronics Inc. This project is released under the MIT License.
- * 
+ *
  * SPDX-License-Identifier: MIT
  */
 
@@ -38,7 +38,6 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 #include "sfToolkit.h"
 
-
 #ifdef ARDUINO
 #include <Arduino.h>
 #endif
@@ -87,3 +86,23 @@ uint32_t sftk_byte_swap(uint32_t i)
     return ((i << 24) & 0xff000000) | ((i << 8) & 0x00ff0000) | ((i >> 8) & 0x0000ff00) | ((i >> 24) & 0x000000ff);
 #endif
 }
+
+//---------------------------------------------------------------------------------
+/**
+ * @brief function - Byte swap an int 16
+ */
+int16_t sftk_byte_swap(int16_t i)
+{
+    uint16_t tmp = sftk_byte_swap(*(uint16_t *)&i);
+    return *(int16_t *)&tmp;
+}
+
+//---------------------------------------------------------------------------------
+/**
+ * @brief function - Byte swap an int 32
+ */
+int32_t sftk_byte_swap(int32_t i)
+{
+    uint32_t tmp = sftk_byte_swap(*(uint32_t *)&i);
+    return *(int32_t *)&tmp;
+}

src/sfTk/sfToolkit.h

@@ -9,11 +9,10 @@
  * @author SparkFun Electronics
  * @date 2024-2025
  * @copyright Copyright (c) 2024-2025, SparkFun Electronics Inc. This project is released under the MIT License.
- * 
+ *
  * SPDX-License-Identifier: MIT
  */
 
-
 #pragma once
 
 #include <stdint.h>
@@ -23,7 +22,6 @@
 */
 #include "sfTkError.h"
 
-
 // byte order types/enum
 enum class sfTkByteOrder : uint8_t
 {
@@ -39,9 +37,10 @@ sfTkByteOrder sftk_system_byteorder(void);
 uint8_t sftk_byte_swap(uint8_t i);
 uint16_t sftk_byte_swap(uint16_t i);
 uint32_t sftk_byte_swap(uint32_t i);
+int16_t sftk_byte_swap(int16_t i);
+int32_t sftk_byte_swap(int32_t i);
 
-
-// Area for platform specific implementations. The interface/functions are 
+// Area for platform specific implementations. The interface/functions are
 // defined here, with the expectation that the platform provides the implementation.
 
 // delay in milliseconds