getting filename and path of current program [arduino]

Capture and extract the filename and path for the current file within an Arduino program. 

There are a few variables available at compile time including compile time and date. The filename is also available and supplied with its full path. The code below shows a way to separate them into String variables.

Code:

/* get the file name and path of this program */

const char this_file[] PROGMEM = __FILE__;          // provided by system
const String file_and_path = String(this_file);     // convert to a String

int n = file_and_path.length();
int i = file_and_path.lastIndexOf("\\") + 1;        // escaped backslash for Windows paths
String filename = file_and_path.substring(i,n);     // from last '\' to end
String filepath = file_and_path.substring(0,i);     // from begin to last '\'


void setup()  {
    Serial.begin(115200);
    while (!Serial) {}

    Serial.println(file_and_path);
    Serial.println(filepath);
    Serial.println(filename);
}


void loop() {
   
}

Output:

C:\Users\david1\Desktop\test\test.ino
C:\Users\david1\Desktop\test\
test.ino