Struct BarcodeScanner 

pub struct BarcodeScanner { /* private fields */ }

A barcode scanner.

Implementations

impl BarcodeScanner

pub fn open(path: impl AsRef<Path>) -> Result<Self, Error>

Create a barcode scanner and grab the device by a device path

Example

let mut scanner = BarcodeScanner::open("/dev/input/event18")?;

Examples found in repository

examples/scan-barcodes.rs (line 12)

fn do_main() -> Result<(), ()> {
	let args: Vec<_> = std::env::args().collect();
	if args.len() != 2 {
		let prog_name = args[0].rsplit_once('/').map(|(_parent, name)| name).unwrap_or(&args[0]);
		eprintln!("Usage: {prog_name} DEVICE_PATH");
		return Err(())
	}

	let device_path = &args[1];
	let mut scanner = BarcodeScanner::open(device_path)
		.map_err(|e| eprintln!("{e}"))?;

	println!("Ready to scan barcodes");
	loop {
		let barcode = scanner.read().map_err(|e| println!("Failed to read barcode: {e}"))?;
		println!("{barcode}");
	}
}

pub fn open_by_physical_path( physical_path: impl AsRef<str>, ) -> Result<Option<Self>, Error>

Create a barcode scanner and grab the device by a physical device path

Example

let device_path = "usb-0000:00:14.0-3/input0";
let mut scanner = BarcodeScanner::open_by_physical_path(device_path)
    .map_err(|e| eprintln!("{}", e))?
    .ok_or_else(|| eprintln!("No such device: {device_path}"))?;

pub fn read(&mut self) -> Result<String, Error>

Read a barcode from the device.

Blocks until an entire barcode has been read.

Example

let barcode = scanner.read()?;
println!("Barcode: {barcode}");

Examples found in repository

examples/scan-barcodes.rs (line 17)

fn do_main() -> Result<(), ()> {
	let args: Vec<_> = std::env::args().collect();
	if args.len() != 2 {
		let prog_name = args[0].rsplit_once('/').map(|(_parent, name)| name).unwrap_or(&args[0]);
		eprintln!("Usage: {prog_name} DEVICE_PATH");
		return Err(())
	}

	let device_path = &args[1];
	let mut scanner = BarcodeScanner::open(device_path)
		.map_err(|e| eprintln!("{e}"))?;

	println!("Ready to scan barcodes");
	loop {
		let barcode = scanner.read().map_err(|e| println!("Failed to read barcode: {e}"))?;
		println!("{barcode}");
	}
}