Created the utilities cpp file containing moved functions that were in the definition.h file

src/app/utilities.cpp

@@ -0,0 +1,88 @@
+#include "utilities.h"
+
+char *addChar(char *pointer, const char character)
+{
+    char *tempAddr = NULL;
+    if(pointer == NULL)
+    {
+        tempAddr = (char *) realloc(pointer, 2*sizeof(char));
+        if(tempAddr == NULL)
+            return NULL;
+        else
+        {
+            pointer = tempAddr;
+            pointer[0] = character;
+            pointer[1] = '\0';
+        }
+    }
+    else
+    {
+        tempAddr = (char *) realloc(pointer, (strlen(pointer)+2)*sizeof(char));
+        if(tempAddr == NULL)
+        {
+            free(pointer);
+            return NULL;
+        }
+        else
+        {
+            pointer = tempAddr;
+            pointer[strlen(pointer)+1] = '\0';
+            pointer[strlen(pointer)] = character;
+        }
+    }
+
+    return pointer;
+}
+
+char *dateTimeFormater(char *pointer, const uint8_t value, const char character)
+{
+  if(pointer == NULL)
+    return pointer;
+
+  if(value < 10)
+  {
+    sprintf(pointer,"%d", value);
+    *(pointer+1) = *(pointer);*(pointer) = character;*(pointer+2) = '\0';
+  }
+  else
+    sprintf(pointer,"%d", value);
+  
+  return pointer;
+}
+
+char *lastIndexOf(char *str, const char character)
+{
+  char *last(NULL), *current(str); 
+  do
+  {
+    current = strchr(current, character);
+    if(current != NULL)
+    {
+      last = current;
+      if(*(current+1) == '\0')break;
+        
+      current += 1;
+    }
+  }while(current != NULL);
+
+  return last;
+}
+
+/**
+ * The monthNumTo3LetterAbbreviation function takes the month number from 1 to 12 and returns the abbreviation in a 3 letter
+ * format.
+ */
+uint32_t monthNumTo3LetterAbbreviation(const uint8_t monthNumber)
+{
+  /**
+   * This array contains months as 3 letter abbreviations
+   * Jan is written \0naJ and in hex : 0x006E614A an so on. They are thus 4Bytes aligned and easy to put and read back from prog mem :)
+   */
+  static const uint32_t PROGMEM monthArray[] = {0x6E614A, 0x626546, 0x72614D, 0x727041, 0x79614D, 0x6E754A, 0x6C754A, 0x677541, 0x706553, 0x74634F, 0x766f4E, 0x636544};
+  uint32_t toReturn(0x6E614A); //Default to Jan.
+  
+  if(monthNumber >= 1 && monthNumber <= 12)
+    toReturn = monthArray[monthNumber - 1];
+    
+  return toReturn;
+}

src/app/utilities.h

@@ -0,0 +1,9 @@
+#ifndef UTILITIES_H
+#define UTILITIES_H
+#include <Arduino.h>
+
+char *addChar(char *pointer, const char character);
+char *lastIndexOf(char *str, const char character);
+char *dateTimeFormater(char *pointer, const uint8_t value, const char character);
+uint32_t monthNumTo3LetterAbbreviation(const uint8_t monthNumber);
+#endif // UTILITIES_H