macro_rules! read_num_bytes {
    ($ty:ty, $size:expr, $src:expr, $which:ident) => {{
        assert!($size == ::std::mem::size_of::<$ty>());
        assert!($size <= $src.len());
        let mut data: $ty = 0;
        unsafe {
            copy_nonoverlapping($src.as_ptr(), &mut data as *mut $ty as *mut u8, $size);
        }
        data.$which()
    }};
}

macro_rules! write_num_bytes {
    ($ty:ty, $size:expr, $n:expr, $dst:expr, $which:ident) => {{
        assert!($size <= $dst.len());
        unsafe {
            // N.B. https://github.com/rust-lang/rust/issues/22776
            let bytes = *(&$n.$which() as *const _ as *const [u8; $size]);
            copy_nonoverlapping((&bytes).as_ptr(), $dst.as_mut_ptr(), $size);
        }
    }};
}

    #[inline]
    fn read_f32(buf: &[u8]) -> f32 {
        unsafe { *(&Self::read_u32(buf) as *const u32 as *const f32) }
    }

    #[inline]
    fn read_f64(buf: &[u8]) -> f64 {
        unsafe { *(&Self::read_u64(buf) as *const u64 as *const f64) }
    }

    #[inline]
    fn write_i16(buf: &mut [u8], n: i16) {
        Self::write_u16(buf, n as u16)
    }

    #[inline]
    fn write_i32(buf: &mut [u8], n: i32) {
        Self::write_u32(buf, n as u32)
    }

    #[inline]
    fn write_i64(buf: &mut [u8], n: i64) {
        Self::write_u64(buf, n as u64)
    }

    #[inline]
    fn write_f32(buf: &mut [u8], n: f32) {
        let n = unsafe { *(&n as *const f32 as *const u32) };
        Self::write_u32(buf, n)
    }

    #[inline]
    fn write_f64(buf: &mut [u8], n: f64) {
        let n = unsafe { *(&n as *const f64 as *const u64) };
        Self::write_u64(buf, n)
    }

impl<R> IoReader<R>
where
    R: io::Read,
{
    fn fill_buffer(&mut self, length: usize) -> Result<()> {
        self.temp_buffer.resize(length, 0);

        self.reader.read_exact(&mut self.temp_buffer)?;

        Ok(())
    }
}

impl<'a, R> BincodeRead<'a> for IoReader<R>
where
    R: io::Read,
{
    fn forward_read_str<V>(&mut self, length: usize, visitor: V) -> Result<V::Value>
    where
        V: serde::de::Visitor<'a>,
    {
        self.fill_buffer(length)?;

        let string = match ::std::str::from_utf8(&self.temp_buffer[..]) {
            Ok(s) => s,
            Err(e) => return Err(::ErrorKind::InvalidUtf8Encoding(e).into()),
        };

        visitor.visit_str(string)
    }

    fn get_byte_buffer(&mut self, length: usize) -> Result<Vec<u8>> {
        self.fill_buffer(length)?;
        Ok(::std::mem::replace(&mut self.temp_buffer, Vec::new()))
    }

    fn forward_read_bytes<V>(&mut self, length: usize, visitor: V) -> Result<V::Value>
    where
        V: serde::de::Visitor<'a>,
    {
        self.fill_buffer(length)?;
        visitor.visit_bytes(&self.temp_buffer[..])
    }
}

#![deny(missing_docs)]
#![allow(unknown_lints, bare_trait_objects, deprecated)]

//! Bincode is a crate for encoding and decoding using a tiny binary
//! serialization strategy.  Using it, you can easily go from having
//! an object in memory, quickly serialize it to bytes, and then
//! deserialize it back just as fast!
//!
//! ### Using Basic Functions
//!
//! ```edition2018
//! fn main() {
//!     // The object that we will serialize.
//!     let target: Option<String>  = Some("hello world".to_string());
//!
//!     let encoded: Vec<u8> = bincode::serialize(&target).unwrap();
//!     let decoded: Option<String> = bincode::deserialize(&encoded[..]).unwrap();
//!     assert_eq!(target, decoded);
//! }
//! ```
//!
//! ### 128bit numbers
//!
//! Support for `i128` and `u128` is automatically enabled on Rust toolchains
//! greater than or equal to `1.26.0` and disabled for targets which do not support it

#![doc(html_root_url = "https://docs.rs/bincode/1.3.3")]
#![crate_name = "bincode"]
#![crate_type = "rlib"]
#![crate_type = "dylib"]

#[macro_use]
extern crate serde;

pub mod config;
/// Deserialize bincode data to a Rust data structure.
pub mod de;

mod byteorder;
mod error;
mod internal;
mod ser;

pub use config::{Config, DefaultOptions, Options};
pub use de::read::BincodeRead;
pub use de::Deserializer;
pub use error::{Error, ErrorKind, Result};
pub use ser::Serializer;

/// Get a default configuration object.

pub fn serialize_into<W, T: ?Sized>(writer: W, value: &T) -> Result<()>
where
    W: std::io::Write,
    T: serde::Serialize,
{
    DefaultOptions::new()
        .with_fixint_encoding()
        .serialize_into(writer, value)
}

/// Serializes a serializable object into a `Vec` of bytes using the default configuration.
///
/// **Warning:** the default configuration used by this function is not
/// the same as that used by the `DefaultOptions` struct. See the
/// [config](config/index.html#options-struct-vs-bincode-functions)
/// module for more details
pub fn serialize<T: ?Sized>(value: &T) -> Result<Vec<u8>>
where
    T: serde::Serialize,
{
    DefaultOptions::new()
        .with_fixint_encoding()
        .allow_trailing_bytes()
        .serialize(value)
}

/// Deserializes an object directly from a `Read`er using the default configuration.
///
/// If this returns an `Error`, `reader` may be in an invalid state.
///
/// **Warning:** the default configuration used by this function is not
/// the same as that used by the `DefaultOptions` struct. See the
/// [config](config/index.html#options-struct-vs-bincode-functions)
/// module for more details
pub fn deserialize_from<R, T>(reader: R) -> Result<T>
where
    R: std::io::Read,
    T: serde::de::DeserializeOwned,
{
    DefaultOptions::new()
        .with_fixint_encoding()
        .allow_trailing_bytes()
        .deserialize_from(reader)
}

/// Deserializes an object from a custom `BincodeRead`er using the default configuration.
/// It is highly recommended to use `deserialize_from` unless you need to implement
/// `BincodeRead` for performance reasons.
///
/// If this returns an `Error`, `reader` may be in an invalid state.
///
/// **Warning:** the default configuration used by this function is not
/// the same as that used by the `DefaultOptions` struct. See the
/// [config](config/index.html#options-struct-vs-bincode-functions)
/// module for more details
pub fn deserialize_from_custom<'a, R, T>(reader: R) -> Result<T>
where
    R: de::read::BincodeRead<'a>,
    T: serde::de::DeserializeOwned,
{
    DefaultOptions::new()
        .with_fixint_encoding()
        .allow_trailing_bytes()
        .deserialize_from_custom(reader)
}

/// Only use this if you know what you're doing.
///
/// This is part of the public API.
#[doc(hidden)]
pub fn deserialize_in_place<'a, R, T>(reader: R, place: &mut T) -> Result<()>
where
    T: serde::de::Deserialize<'a>,
    R: BincodeRead<'a>,
{
    DefaultOptions::new()
        .with_fixint_encoding()
        .allow_trailing_bytes()
        .deserialize_in_place(reader, place)
}

/// Deserializes a slice of bytes into an instance of `T` using the default configuration.
///
/// **Warning:** the default configuration used by this function is not
/// the same as that used by the `DefaultOptions` struct. See the
/// [config](config/index.html#options-struct-vs-bincode-functions)
/// module for more details
pub fn deserialize<'a, T>(bytes: &'a [u8]) -> Result<T>
where
    T: serde::de::Deserialize<'a>,
{
    DefaultOptions::new()
        .with_fixint_encoding()
        .allow_trailing_bytes()
        .deserialize(bytes)
}