// SafeString_StringToInt.ino
// Converts Arduino String to an int using SafeString.toInt()
// https://www.forward.com.au/pfod/ArduinoProgramming/SerialReadingParsing/index.html
//
// download SafeString library from Arduino library manager
// or from the tutorial page
// https://www.forward.com.au/pfod/ArduinoProgramming/SafeString/index.html
//
// Pros: Very robust catches invalid numbers and handles leading zeros/white space and trailing white space
// Cons: Nothing really, except needs SafeString library to be installed.

#include "SafeString.h"

cSF(sfString, 15);

void setup() {
  Serial.begin(9600);
  for (int i = 10; i > 0; i--) {
    Serial.print(' '); Serial.print(i);
    delay(500);
  }
  Serial.println();
  Serial.println(F("SafeString_StringToInt.ino"));

  sfString = " 0043 \n"; // sfString is a SafeString
  int result = 0;
  if (sfString.toInt(result)) { // ignores leading and trailing whitespace
    Serial.print(F(" result = ")); Serial.println(result);
  } else {
    Serial.print(F("Not a valid integer '")); Serial.print(sfString); Serial.println("'");
  }
  // other SafeString conversion methods
  // toLong(long&)  hexToLong(long&) octToLong(long&) binToLong(long&) toFloat(float&) toDouble(double&)

  // To convert from an Arduino String
  // first wrap the Arduino String's underlying char[] in a SafeString
  String numStr = " 0004 \n"; // an Arduino String
  cSFP(sfStr, (char*)numStr.c_str()); // wrap String's char[] in a SafeString
  int numResult = 0;
  if (sfStr.toInt(numResult)) { // ignores leading and trailing whitespace
    Serial.print(F(" numResult = ")); Serial.println(numResult);
  } else {
    Serial.print(F("Not a valid integer '")); Serial.print(numStr); Serial.println("'");
  }

}

void loop() {
  // put your main code here, to run repeatedly:

}