Vendor things

third-party/vendor/wayland-commons/src/debug.rs

@@ -0,0 +1,71 @@
+//! Debugging helpers to handle `WAYLAND_DEBUG` env variable.
+
+use std::time::{SystemTime, UNIX_EPOCH};
+
+use crate::wire::Argument;
+
+/// Print the dispatched message to stderr in a following format:
+///
+/// [timestamp] <- interface@id.msg_name(args)
+pub fn print_dispatched_message(interface: &str, id: u32, msg_name: &str, args: &[Argument]) {
+    // Add timestamp to output.
+    print_timestamp();
+
+    eprint!(" <- {}@{}.{}", interface, id, msg_name);
+
+    print_args(args);
+
+    // Add a new line.
+    eprintln!();
+}
+
+/// Print the send message to stderr in a following format:
+///
+/// [timestamp] -> interface@id.msg_name(args)
+///
+/// If `is_alive` is `false` the `[ZOMBIE]` is added after `id`.
+pub fn print_send_message(
+    interface: &str,
+    id: u32,
+    is_alive: bool,
+    msg_name: &str,
+    args: &[Argument],
+) {
+    // Add timestamp to output.
+    print_timestamp();
+
+    eprint!(" -> {}@{}{}.{}", interface, id, if is_alive { "" } else { "[ZOMBIE]" }, msg_name);
+
+    print_args(args);
+
+    // Add a new line.
+    eprintln!();
+}
+
+/// Print arguments with opening/closing bracket.
+fn print_args(args: &[Argument]) {
+    let num_args = args.len();
+
+    eprint!("(");
+
+    if num_args > 0 {
+        // Explicitly handle first argument to handle one arg functions nicely.
+        eprint!("{}", args[0]);
+
+        // Handle the rest.
+        for arg in args.iter().take(num_args).skip(1) {
+            eprint!(", {}", arg);
+        }
+    }
+
+    eprint!(")")
+}
+
+/// Print timestamp in seconds.microseconds format.
+fn print_timestamp() {
+    if let Ok(timestamp) = SystemTime::now().duration_since(UNIX_EPOCH) {
+        let sc = timestamp.as_secs();
+        let ms = timestamp.subsec_micros();
+        eprint!("[{}.{:06}]", sc, ms);
+    }
+}