only use raw mode

1 files changed, 61 insertions, 0 deletions

diff --git a/src/bin/windows-test/main.rs b/src/bin/windows-test/main.rs
new file mode 100644
index 0000000..b8f84fe
--- /dev/null
+++ b/src/bin/windows-test/main.rs
@@ -0,0 +1,61 @@
+use std::io::{self, Write};
+use std::ptr;
+use windows_sys::Win32::Foundation::HANDLE;
+use windows_sys::Win32::System::Console::{
+    GetConsoleMode, ReadConsoleW, SetConsoleMode, GetStdHandle, STD_INPUT_HANDLE,
+    ENABLE_ECHO_INPUT, ENABLE_LINE_INPUT,
+};
+
+fn main() -> io::Result<()> {
+    unsafe {
+        let h: HANDLE = GetStdHandle(STD_INPUT_HANDLE);
+        if h == std::ptr::null_mut() || h == -1_i32 as HANDLE { return Err(io::Error::last_os_error()); }
+
+        // save current mode
+        let mut mode: u32 = 0;
+        if GetConsoleMode(h, &mut mode) == 0 { return Err(io::Error::last_os_error()); }
+
+        // disable line input and echo so input is available per-key and not echoed
+        let new_mode = mode & !(ENABLE_LINE_INPUT | ENABLE_ECHO_INPUT);
+        if SetConsoleMode(h, new_mode) == 0 { return Err(io::Error::last_os_error()); }
+
+        print!("Press keys (q to exit): ");
+        io::stdout().flush()?;
+
+        // ReadConsoleW reads UTF-16; we'll read one wchar at a time
+        let mut buf: [u16; 1] = [0];
+        loop {
+            let mut read = 0u32;
+            if ReadConsoleW(
+                h,
+                buf.as_mut_ptr() as *mut _,
+                1,
+                &mut read,
+                ptr::null_mut(),
+            ) == 0
+            {
+                // restore mode on error before returning
+                let _ = SetConsoleMode(h, mode);
+                return Err(io::Error::last_os_error());
+            }
+
+            let ch = std::char::from_u32(buf[0] as u32).unwrap_or('\u{FFFD}');
+            if ch == 'q' { break; } // q to exit
+
+            // handle Enter (CR) so output is readable
+            if ch == '\r' {
+                println!();
+            } else {
+                // show code point (no automatic console echo)
+                print!("[{:?}]", ch);
+                io::stdout().flush()?;
+            }
+        }
+
+        // restore original console mode
+        let _ = SetConsoleMode(h, mode);
+        println!("\nexited");
+    }
+
+    Ok(())
+}