Apply Clippy suggestions

ctru-rs/src/console.rs

@@ -37,6 +37,7 @@ impl Console {
     /// The first two arguments are the desired coordinates of the top-left corner
     /// of the console, and the second pair is the new width and height
     ///
+    /// # Safety
     /// This function is unsafe because it does not validate that the input will produce
     /// a console that actually fits on the screen
     pub unsafe fn set_window(&mut self, x: i32, y: i32, width: i32, height: i32) {

ctru-rs/src/services/fs.rs

@@ -233,7 +233,7 @@ pub struct Metadata {
 ///             .open("foo.txt")
 ///             .unwrap();
 /// ```
-#[derive(Clone)]
+#[derive(Clone, Default)]
 pub struct OpenOptions {
     read: bool,
     write: bool,
@@ -318,10 +318,7 @@ impl Fs {
             if r < 0 {
                 Err(crate::Error::from(r))
             } else {
-                Ok(Archive {
-                    handle: handle,
-                    id: id,
-                })
+                Ok(Archive { handle, id })
             }
         }
     }
@@ -430,10 +427,7 @@ impl File {
                     crate::Error::from(r),
                 ))
             } else {
-                Ok(Metadata {
-                    attributes: 0,
-                    size: size,
-                })
+                Ok(Metadata { attributes: 0, size })
             }
         }
     }
@@ -496,6 +490,9 @@ impl Metadata {
     /// Returns the size, in bytes, this metadata is for.
     ///
     /// Directories return size = 0.
+    // We don't want an is_empty function because directories always have a
+    // zero size.
+    #[allow(clippy::len_without_is_empty)]
     pub fn len(&self) -> u64 {
         self.size
     }
@@ -506,14 +503,7 @@ impl OpenOptions {
     ///
     /// All options are initially set to `false`
     pub fn new() -> OpenOptions {
-        OpenOptions {
-            read: false,
-            write: false,
-            append: false,
-            truncate: false,
-            create: false,
-            arch_handle: 0,
-        }
+        Self::default()
     }
 
     /// Sets the option for read access.
@@ -753,8 +743,8 @@ pub fn create_dir_all<P: AsRef<Path>>(arch: &Archive, path: P) -> IoResult<()> {
 
 /// Given a path, query the file system to get information about a file, directory, etc
 pub fn metadata<P: AsRef<Path>>(arch: &Archive, path: P) -> IoResult<Metadata> {
-    let maybe_file = File::open(&arch, path.as_ref());
-    let maybe_dir = read_dir(&arch, path.as_ref());
+    let maybe_file = File::open(arch, path.as_ref());
+    let maybe_dir = read_dir(arch, path.as_ref());
     match (maybe_file, maybe_dir) {
         (Ok(file), _) => file.metadata(),
         (_, Ok(_dir)) => Ok(Metadata {
@@ -828,8 +818,8 @@ pub fn read_dir<P: AsRef<Path>>(arch: &Archive, path: P) -> IoResult<ReadDir> {
         } else {
             Ok(ReadDir {
                 handle: Dir(handle),
-                root: root,
-                arch: arch,
+                root,
+                arch,
             })
         }
     }
@@ -897,7 +887,7 @@ fn to_utf16(path: &Path) -> WideCString {
 }
 
 // Adapted from sys/windows/fs.rs in libstd
-fn truncate_utf16_at_nul<'a>(v: &'a [u16]) -> &'a [u16] {
+fn truncate_utf16_at_nul(v: &[u16]) -> &[u16] {
     match v.iter().position(|c| *c == 0) {
         // don't include the 0
         Some(i) => &v[..i],
@@ -933,7 +923,7 @@ unsafe fn read_to_end_uninitialized(r: &mut dyn Read, buf: &mut Vec<u8>) -> IoRe
         }
 
         let buf_slice = slice::from_raw_parts_mut(
-            buf.as_mut_ptr().offset(buf.len() as isize),
+            buf.as_mut_ptr().add(buf.len()),
             buf.capacity() - buf.len(),
         );
 

ctru-rs/src/services/hid.rs

@@ -106,10 +106,16 @@ impl Hid {
     }
 }
 
+impl Default for TouchPosition {
+    fn default() -> Self {
+        TouchPosition(ctru_sys::touchPosition { px: 0, py: 0 })
+    }
+}
+
 impl TouchPosition {
     /// Create a new TouchPosition instance.
     pub fn new() -> Self {
-        TouchPosition(ctru_sys::touchPosition { px: 0, py: 0 })
+        Self::default()
     }
 
     /// Returns the current touch position in pixels.
@@ -121,10 +127,16 @@ impl TouchPosition {
     }
 }
 
+impl Default for CirclePosition {
+    fn default() -> Self {
+        CirclePosition(ctru_sys::circlePosition { dx: 0, dy: 0 })
+    }
+}
+
 impl CirclePosition {
     /// Create a new CirclePosition instance.
     pub fn new() -> Self {
-        CirclePosition(ctru_sys::circlePosition { dx: 0, dy: 0 })
+        Self::default()
     }
 
     /// Returns the current circle pad position in (x, y) form.

ctru-rs/src/thread.rs

@@ -49,7 +49,7 @@ use std::time::Duration;
 
 /// Thread factory, which can be used in order to configure the properties of
 /// a new thread.
-#[derive(Debug)]
+#[derive(Debug, Default)]
 pub struct Builder {
     // The size of the stack for the spawned thread in bytes
     stack_size: Option<usize>,
@@ -78,11 +78,7 @@ impl Builder {
     /// handler.join().unwrap();
     /// ```
     pub fn new() -> Builder {
-        Builder {
-            stack_size: None,
-            priority: None,
-            affinity: None,
-        }
+        Self::default()
     }
 
     /// Sets the size of the stack (in bytes) for the new thread.
@@ -102,6 +98,7 @@ impl Builder {
     /// ```
     ///
     /// [stack-size]: ./index.html#stack-size
+    #[must_use]
     pub fn stack_size(mut self, size: usize) -> Builder {
         self.stack_size = Some(size);
         self
@@ -112,6 +109,7 @@ impl Builder {
     /// Low values gives the thread higher priority. For userland apps, this has
     /// to be within the range of 0x18 to 0x3F inclusive. The main thread usually
     /// has a priority of 0x30, but not always.
+    #[must_use]
     pub fn priority(mut self, priority: i32) -> Builder {
         self.priority = Some(priority);
         self
@@ -134,6 +132,7 @@ impl Builder {
     ///
     /// Processes in the BASE memory region can always create threads on
     /// processors #2 and #3.
+    #[must_use]
     pub fn affinity(mut self, affinity: i32) -> Builder {
         self.affinity = Some(affinity);
         self
@@ -188,7 +187,7 @@ impl Builder {
 
         // If no priority value is specified, spawn with the same
         // priority as the parent thread
-        let priority = priority.unwrap_or_else(|| imp::Thread::priority());
+        let priority = priority.unwrap_or_else(imp::Thread::priority);
 
         // If no affinity is specified, spawn on the default core (determined by
         // the application's Exheader)
@@ -434,6 +433,8 @@ pub fn park() {
     }
     loop {
         m = thread.inner.cvar.wait(m).unwrap();
+
+        #[allow(clippy::single_match)]
         match thread
             .inner
             .state
@@ -891,7 +892,6 @@ mod imp {
     use std::convert::TryInto;
     use std::io;
     use std::mem;
-    use std::ptr;
     use std::time::Duration;
 
     use libc;
@@ -929,11 +929,11 @@ mod imp {
                 false,
             );
 
-            return if handle == ptr::null_mut() {
+            return if handle.is_null() {
                 Err(io::Error::from_raw_os_error(libc::EAGAIN))
             } else {
                 mem::forget(p); // ownership passed to the new thread
-                Ok(Thread { handle: handle })
+                Ok(Thread { handle })
             };
 
             extern "C" fn thread_func(start: *mut libc::c_void) {

ctru-sys/src/lib.rs

@@ -1,6 +1,7 @@
 #![allow(non_upper_case_globals)]
 #![allow(non_camel_case_types)]
 #![allow(non_snake_case)]
+#![allow(clippy::all)]
 #![no_std]
 
 include!("bindings.rs");