From 1b6a04ca5504955c571d1c97504fb45ea0befee4 Mon Sep 17 00:00:00 2001
From: Valentin Popov <valentin@popov.link>
Date: Mon, 8 Jan 2024 01:21:28 +0400
Subject: Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>
---
 vendor/redox_syscall/src/io/io.rs | 71 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 vendor/redox_syscall/src/io/io.rs

(limited to 'vendor/redox_syscall/src/io/io.rs')

diff --git a/vendor/redox_syscall/src/io/io.rs b/vendor/redox_syscall/src/io/io.rs
new file mode 100644
index 0000000..2c4acd3
--- /dev/null
+++ b/vendor/redox_syscall/src/io/io.rs
@@ -0,0 +1,71 @@
+use core::cmp::PartialEq;
+use core::ops::{BitAnd, BitOr, Not};
+
+pub trait Io {
+    type Value: Copy + PartialEq + BitAnd<Output = Self::Value> + BitOr<Output = Self::Value> + Not<Output = Self::Value>;
+
+    fn read(&self) -> Self::Value;
+    fn write(&mut self, value: Self::Value);
+
+    #[inline(always)]
+    fn readf(&self, flags: Self::Value) -> bool  {
+        (self.read() & flags) as Self::Value == flags
+    }
+
+    #[inline(always)]
+    fn writef(&mut self, flags: Self::Value, value: bool) {
+        let tmp: Self::Value = match value {
+            true => self.read() | flags,
+            false => self.read() & !flags,
+        };
+        self.write(tmp);
+    }
+}
+
+pub struct ReadOnly<I> {
+    inner: I
+}
+
+impl<I> ReadOnly<I> {
+    pub const fn new(inner: I) -> ReadOnly<I> {
+        ReadOnly {
+            inner: inner
+        }
+    }
+}
+
+impl<I: Io> ReadOnly<I> {
+    #[inline(always)]
+    pub fn read(&self) -> I::Value {
+        self.inner.read()
+    }
+
+    #[inline(always)]
+    pub fn readf(&self, flags: I::Value) -> bool {
+        self.inner.readf(flags)
+    }
+}
+
+pub struct WriteOnly<I> {
+    inner: I
+}
+
+impl<I> WriteOnly<I> {
+    pub const fn new(inner: I) -> WriteOnly<I> {
+        WriteOnly {
+            inner: inner
+        }
+    }
+}
+
+impl<I: Io> WriteOnly<I> {
+    #[inline(always)]
+    pub fn write(&mut self, value: I::Value) {
+        self.inner.write(value)
+    }
+
+    #[inline(always)]
+    pub fn writef(&mut self, flags: I::Value, value: bool) {
+        self.inner.writef(flags, value)
+    }
+}
-- 
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