Add enumerate example

examples/enumerate.rs

@@ -0,0 +1,40 @@
+extern crate k4a_sys;
+use std::ptr;
+use k4a_sys::*;
+
+fn main() {
+    unsafe {
+        let mut device: k4a_sys::k4a_device_t = ptr::null_mut();
+
+        let device_count = k4a_device_get_installed_count();
+        println!("Found {} connected devices:", device_count);
+        for device_idx in 0..device_count {
+            if k4a_device_open(device_idx, &mut device) != k4a_buffer_result_t_K4A_BUFFER_RESULT_SUCCEEDED {
+                println!("Failed to open device #{}", device_idx);
+                continue;
+            }
+            let mut serial_number_length: usize = 0;
+
+            if k4a_device_get_serialnum(device, ptr::null_mut(), &mut serial_number_length) != 
+                k4a_buffer_result_t_K4A_BUFFER_RESULT_TOO_SMALL {
+                println!("{}: Failed to get serial number length", device_idx);
+                k4a_device_close(device);
+                device = ptr::null_mut();
+                continue;
+            }
+
+            let mut serial_number = vec![0i8; serial_number_length];
+            let serial_number_ptr = (&mut serial_number).as_mut_ptr();
+
+            if k4a_device_get_serialnum(device, serial_number_ptr, &mut serial_number_length) != 
+                k4a_buffer_result_t_K4A_BUFFER_RESULT_SUCCEEDED {
+                println!("{}: Failed to get serial number", device_idx);
+                k4a_device_close(device);
+                device = ptr::null_mut();
+                continue;
+            }
+        println!("{}: Device \"{:?}\"\n", device_idx, serial_number);
+        k4a_device_close(device);
+    }
+    }
+}