mirror of https://git.sr.ht/~stygianentity/bincode
773 lines
19 KiB
Rust
773 lines
19 KiB
Rust
use std::io::Write;
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use std::u32;
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use serde;
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use byteorder::WriteBytesExt;
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use super::config::{IntEncoding, SizeLimit};
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use super::{Error, ErrorKind, Result};
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use config::{BincodeByteOrder, Options};
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use std::mem::size_of;
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/// An Serializer that encodes values directly into a Writer.
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///
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/// The specified byte-order will impact the endianness that is
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/// used during the encoding.
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///
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/// This struct should not be used often.
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/// For most cases, prefer the `encode_into` function.
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pub struct Serializer<W, O: Options> {
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writer: W,
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_options: O,
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}
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macro_rules! impl_serialize_literal {
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($ser_method:ident($ty:ty) = $write:ident()) => {
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pub(crate) fn $ser_method(&mut self, v: $ty) -> Result<()> {
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self.writer
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.$write::<<O::Endian as BincodeByteOrder>::Endian>(v)
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.map_err(Into::into)
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}
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};
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}
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impl<W: Write, O: Options> Serializer<W, O> {
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/// Creates a new Serializer with the given `Write`r.
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pub fn new(w: W, options: O) -> Serializer<W, O> {
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Serializer {
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writer: w,
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_options: options,
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}
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}
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pub(crate) fn serialize_byte(&mut self, v: u8) -> Result<()> {
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self.writer.write_u8(v).map_err(Into::into)
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}
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impl_serialize_literal! {serialize_literal_u16(u16) = write_u16()}
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impl_serialize_literal! {serialize_literal_u32(u32) = write_u32()}
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impl_serialize_literal! {serialize_literal_u64(u64) = write_u64()}
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serde_if_integer128! {
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impl_serialize_literal!{serialize_literal_u128(u128) = write_u128()}
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}
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}
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macro_rules! impl_serialize_int {
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($ser_method:ident($ty:ty) = $ser_int:ident()) => {
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fn $ser_method(self, v: $ty) -> Result<()> {
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O::IntEncoding::$ser_int(self, v)
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}
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};
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}
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impl<'a, W: Write, O: Options> serde::Serializer for &'a mut Serializer<W, O> {
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type Ok = ();
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type Error = Error;
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type SerializeSeq = Compound<'a, W, O>;
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type SerializeTuple = Compound<'a, W, O>;
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type SerializeTupleStruct = Compound<'a, W, O>;
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type SerializeTupleVariant = Compound<'a, W, O>;
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type SerializeMap = Compound<'a, W, O>;
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type SerializeStruct = Compound<'a, W, O>;
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type SerializeStructVariant = Compound<'a, W, O>;
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fn serialize_unit(self) -> Result<()> {
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Ok(())
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}
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fn serialize_unit_struct(self, _: &'static str) -> Result<()> {
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Ok(())
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}
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fn serialize_bool(self, v: bool) -> Result<()> {
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self.serialize_byte(v as u8)
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}
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fn serialize_u8(self, v: u8) -> Result<()> {
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self.serialize_byte(v)
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}
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impl_serialize_int! {serialize_u16(u16) = serialize_u16()}
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impl_serialize_int! {serialize_u32(u32) = serialize_u32()}
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impl_serialize_int! {serialize_u64(u64) = serialize_u64()}
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fn serialize_i8(self, v: i8) -> Result<()> {
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self.serialize_byte(v as u8)
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}
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impl_serialize_int! {serialize_i16(i16) = serialize_i16()}
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impl_serialize_int! {serialize_i32(i32) = serialize_i32()}
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impl_serialize_int! {serialize_i64(i64) = serialize_i64()}
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serde_if_integer128! {
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impl_serialize_int!{serialize_u128(u128) = serialize_u128()}
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impl_serialize_int!{serialize_i128(i128) = serialize_i128()}
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}
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fn serialize_f32(self, v: f32) -> Result<()> {
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self.writer
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.write_f32::<<O::Endian as BincodeByteOrder>::Endian>(v)
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.map_err(Into::into)
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}
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fn serialize_f64(self, v: f64) -> Result<()> {
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self.writer
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.write_f64::<<O::Endian as BincodeByteOrder>::Endian>(v)
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.map_err(Into::into)
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}
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fn serialize_str(self, v: &str) -> Result<()> {
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O::IntEncoding::serialize_len(self, v.len())?;
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self.writer.write_all(v.as_bytes()).map_err(Into::into)
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}
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fn serialize_char(self, c: char) -> Result<()> {
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self.writer
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.write_all(encode_utf8(c).as_slice())
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.map_err(Into::into)
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}
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fn serialize_bytes(self, v: &[u8]) -> Result<()> {
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O::IntEncoding::serialize_len(self, v.len())?;
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self.writer.write_all(v).map_err(Into::into)
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}
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fn serialize_none(self) -> Result<()> {
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self.writer.write_u8(0).map_err(Into::into)
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}
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fn serialize_some<T: ?Sized>(self, v: &T) -> Result<()>
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where
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T: serde::Serialize,
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{
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self.writer.write_u8(1)?;
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v.serialize(self)
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}
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fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq> {
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let len = len.ok_or(ErrorKind::SequenceMustHaveLength)?;
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O::IntEncoding::serialize_len(self, len)?;
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Ok(Compound { ser: self })
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}
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fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple> {
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Ok(Compound { ser: self })
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}
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fn serialize_tuple_struct(
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self,
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_name: &'static str,
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_len: usize,
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) -> Result<Self::SerializeTupleStruct> {
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Ok(Compound { ser: self })
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}
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fn serialize_tuple_variant(
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self,
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_name: &'static str,
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variant_index: u32,
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_variant: &'static str,
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_len: usize,
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) -> Result<Self::SerializeTupleVariant> {
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O::IntEncoding::serialize_u32(self, variant_index)?;
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Ok(Compound { ser: self })
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}
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fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap> {
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let len = len.ok_or(ErrorKind::SequenceMustHaveLength)?;
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O::IntEncoding::serialize_len(self, len)?;
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Ok(Compound { ser: self })
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}
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fn serialize_struct(self, _name: &'static str, _len: usize) -> Result<Self::SerializeStruct> {
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Ok(Compound { ser: self })
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}
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fn serialize_struct_variant(
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self,
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_name: &'static str,
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variant_index: u32,
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_variant: &'static str,
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_len: usize,
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) -> Result<Self::SerializeStructVariant> {
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O::IntEncoding::serialize_u32(self, variant_index)?;
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Ok(Compound { ser: self })
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}
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fn serialize_newtype_struct<T: ?Sized>(self, _name: &'static str, value: &T) -> Result<()>
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where
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T: serde::ser::Serialize,
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{
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value.serialize(self)
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}
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fn serialize_newtype_variant<T: ?Sized>(
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self,
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_name: &'static str,
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variant_index: u32,
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_variant: &'static str,
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value: &T,
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) -> Result<()>
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where
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T: serde::ser::Serialize,
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{
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O::IntEncoding::serialize_u32(self, variant_index)?;
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value.serialize(self)
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}
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fn serialize_unit_variant(
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self,
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_name: &'static str,
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variant_index: u32,
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_variant: &'static str,
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) -> Result<()> {
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O::IntEncoding::serialize_u32(self, variant_index)
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}
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fn is_human_readable(&self) -> bool {
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false
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}
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}
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pub(crate) struct SizeChecker<O: Options> {
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pub options: O,
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pub total: u64,
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}
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impl<O: Options> SizeChecker<O> {
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fn add_raw(&mut self, size: u64) -> Result<()> {
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self.options.limit().add(size)?;
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self.total += size;
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Ok(())
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}
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fn add_discriminant(&mut self, idx: u32) -> Result<()> {
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let bytes = O::IntEncoding::u32_size(idx);
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self.add_raw(bytes)
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}
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fn add_len(&mut self, len: usize) -> Result<()> {
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let bytes = O::IntEncoding::len_size(len);
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self.add_raw(bytes)
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}
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}
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macro_rules! impl_size_int {
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($ser_method:ident($ty:ty) = $size_method:ident()) => {
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fn $ser_method(self, v: $ty) -> Result<()> {
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self.add_raw(O::IntEncoding::$size_method(v))
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}
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};
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}
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impl<'a, O: Options> serde::Serializer for &'a mut SizeChecker<O> {
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type Ok = ();
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type Error = Error;
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type SerializeSeq = SizeCompound<'a, O>;
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type SerializeTuple = SizeCompound<'a, O>;
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type SerializeTupleStruct = SizeCompound<'a, O>;
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type SerializeTupleVariant = SizeCompound<'a, O>;
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type SerializeMap = SizeCompound<'a, O>;
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type SerializeStruct = SizeCompound<'a, O>;
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type SerializeStructVariant = SizeCompound<'a, O>;
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fn serialize_unit(self) -> Result<()> {
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Ok(())
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}
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fn serialize_unit_struct(self, _: &'static str) -> Result<()> {
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Ok(())
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}
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fn serialize_bool(self, _: bool) -> Result<()> {
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self.add_raw(1)
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}
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fn serialize_u8(self, _: u8) -> Result<()> {
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self.add_raw(1)
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}
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fn serialize_i8(self, _: i8) -> Result<()> {
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self.add_raw(1)
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}
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impl_size_int! {serialize_u16(u16) = u16_size()}
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impl_size_int! {serialize_u32(u32) = u32_size()}
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impl_size_int! {serialize_u64(u64) = u64_size()}
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impl_size_int! {serialize_i16(i16) = i16_size()}
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impl_size_int! {serialize_i32(i32) = i32_size()}
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impl_size_int! {serialize_i64(i64) = i64_size()}
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serde_if_integer128! {
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impl_size_int!{serialize_u128(u128) = u128_size()}
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impl_size_int!{serialize_i128(i128) = i128_size()}
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}
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fn serialize_f32(self, _: f32) -> Result<()> {
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self.add_raw(size_of::<f32>() as u64)
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}
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fn serialize_f64(self, _: f64) -> Result<()> {
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self.add_raw(size_of::<f64>() as u64)
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}
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fn serialize_str(self, v: &str) -> Result<()> {
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self.add_len(v.len())?;
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self.add_raw(v.len() as u64)
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}
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fn serialize_char(self, c: char) -> Result<()> {
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self.add_raw(encode_utf8(c).as_slice().len() as u64)
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}
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fn serialize_bytes(self, v: &[u8]) -> Result<()> {
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self.add_len(v.len())?;
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self.add_raw(v.len() as u64)
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}
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fn serialize_none(self) -> Result<()> {
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self.add_raw(1)
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}
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fn serialize_some<T: ?Sized>(self, v: &T) -> Result<()>
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where
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T: serde::Serialize,
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{
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self.add_raw(1)?;
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v.serialize(self)
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}
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fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq> {
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let len = len.ok_or(ErrorKind::SequenceMustHaveLength)?;
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self.add_len(len)?;
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Ok(SizeCompound { ser: self })
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}
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fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple> {
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Ok(SizeCompound { ser: self })
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}
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fn serialize_tuple_struct(
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self,
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_name: &'static str,
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_len: usize,
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) -> Result<Self::SerializeTupleStruct> {
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Ok(SizeCompound { ser: self })
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}
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fn serialize_tuple_variant(
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self,
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_name: &'static str,
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variant_index: u32,
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_variant: &'static str,
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_len: usize,
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) -> Result<Self::SerializeTupleVariant> {
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self.add_raw(O::IntEncoding::u32_size(variant_index))?;
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Ok(SizeCompound { ser: self })
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}
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fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap> {
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let len = len.ok_or(ErrorKind::SequenceMustHaveLength)?;
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self.add_len(len)?;
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Ok(SizeCompound { ser: self })
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}
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fn serialize_struct(self, _name: &'static str, _len: usize) -> Result<Self::SerializeStruct> {
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Ok(SizeCompound { ser: self })
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}
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fn serialize_struct_variant(
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self,
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_name: &'static str,
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variant_index: u32,
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_variant: &'static str,
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_len: usize,
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) -> Result<Self::SerializeStructVariant> {
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self.add_discriminant(variant_index)?;
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Ok(SizeCompound { ser: self })
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}
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fn serialize_newtype_struct<V: serde::Serialize + ?Sized>(
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self,
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_name: &'static str,
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v: &V,
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) -> Result<()> {
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v.serialize(self)
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}
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fn serialize_unit_variant(
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self,
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_name: &'static str,
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variant_index: u32,
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_variant: &'static str,
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) -> Result<()> {
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self.add_discriminant(variant_index)
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}
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fn serialize_newtype_variant<V: serde::Serialize + ?Sized>(
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self,
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_name: &'static str,
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variant_index: u32,
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_variant: &'static str,
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value: &V,
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) -> Result<()> {
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self.add_discriminant(variant_index)?;
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value.serialize(self)
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}
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fn is_human_readable(&self) -> bool {
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false
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}
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}
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pub struct Compound<'a, W: 'a, O: Options + 'a> {
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ser: &'a mut Serializer<W, O>,
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}
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impl<'a, W, O> serde::ser::SerializeSeq for Compound<'a, W, O>
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where
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W: Write,
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O: Options,
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{
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type Ok = ();
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type Error = Error;
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#[inline]
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fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<()>
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where
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T: serde::ser::Serialize,
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{
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value.serialize(&mut *self.ser)
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}
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#[inline]
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fn end(self) -> Result<()> {
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Ok(())
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}
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}
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impl<'a, W, O> serde::ser::SerializeTuple for Compound<'a, W, O>
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where
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W: Write,
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O: Options,
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{
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type Ok = ();
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type Error = Error;
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#[inline]
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fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<()>
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where
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T: serde::ser::Serialize,
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{
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value.serialize(&mut *self.ser)
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}
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|
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#[inline]
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fn end(self) -> Result<()> {
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Ok(())
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}
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}
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impl<'a, W, O> serde::ser::SerializeTupleStruct for Compound<'a, W, O>
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where
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W: Write,
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O: Options,
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{
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type Ok = ();
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type Error = Error;
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#[inline]
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fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<()>
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where
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T: serde::ser::Serialize,
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{
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value.serialize(&mut *self.ser)
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}
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|
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#[inline]
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fn end(self) -> Result<()> {
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Ok(())
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}
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}
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|
|
impl<'a, W, O> serde::ser::SerializeTupleVariant for Compound<'a, W, O>
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where
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W: Write,
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O: Options,
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{
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type Ok = ();
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type Error = Error;
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|
|
#[inline]
|
|
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<()>
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|
where
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|
T: serde::ser::Serialize,
|
|
{
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value.serialize(&mut *self.ser)
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}
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|
|
#[inline]
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|
fn end(self) -> Result<()> {
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Ok(())
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}
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}
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|
|
impl<'a, W, O> serde::ser::SerializeMap for Compound<'a, W, O>
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|
where
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W: Write,
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O: Options,
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{
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type Ok = ();
|
|
type Error = Error;
|
|
|
|
#[inline]
|
|
fn serialize_key<K: ?Sized>(&mut self, value: &K) -> Result<()>
|
|
where
|
|
K: serde::ser::Serialize,
|
|
{
|
|
value.serialize(&mut *self.ser)
|
|
}
|
|
|
|
#[inline]
|
|
fn serialize_value<V: ?Sized>(&mut self, value: &V) -> Result<()>
|
|
where
|
|
V: serde::ser::Serialize,
|
|
{
|
|
value.serialize(&mut *self.ser)
|
|
}
|
|
|
|
#[inline]
|
|
fn end(self) -> Result<()> {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl<'a, W, O> serde::ser::SerializeStruct for Compound<'a, W, O>
|
|
where
|
|
W: Write,
|
|
O: Options,
|
|
{
|
|
type Ok = ();
|
|
type Error = Error;
|
|
|
|
#[inline]
|
|
fn serialize_field<T: ?Sized>(&mut self, _key: &'static str, value: &T) -> Result<()>
|
|
where
|
|
T: serde::ser::Serialize,
|
|
{
|
|
value.serialize(&mut *self.ser)
|
|
}
|
|
|
|
#[inline]
|
|
fn end(self) -> Result<()> {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl<'a, W, O> serde::ser::SerializeStructVariant for Compound<'a, W, O>
|
|
where
|
|
W: Write,
|
|
O: Options,
|
|
{
|
|
type Ok = ();
|
|
type Error = Error;
|
|
|
|
#[inline]
|
|
fn serialize_field<T: ?Sized>(&mut self, _key: &'static str, value: &T) -> Result<()>
|
|
where
|
|
T: serde::ser::Serialize,
|
|
{
|
|
value.serialize(&mut *self.ser)
|
|
}
|
|
|
|
#[inline]
|
|
fn end(self) -> Result<()> {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
pub(crate) struct SizeCompound<'a, S: Options + 'a> {
|
|
ser: &'a mut SizeChecker<S>,
|
|
}
|
|
|
|
impl<'a, O: Options> serde::ser::SerializeSeq for SizeCompound<'a, O> {
|
|
type Ok = ();
|
|
type Error = Error;
|
|
|
|
#[inline]
|
|
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<()>
|
|
where
|
|
T: serde::ser::Serialize,
|
|
{
|
|
value.serialize(&mut *self.ser)
|
|
}
|
|
|
|
#[inline]
|
|
fn end(self) -> Result<()> {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl<'a, O: Options> serde::ser::SerializeTuple for SizeCompound<'a, O> {
|
|
type Ok = ();
|
|
type Error = Error;
|
|
|
|
#[inline]
|
|
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<()>
|
|
where
|
|
T: serde::ser::Serialize,
|
|
{
|
|
value.serialize(&mut *self.ser)
|
|
}
|
|
|
|
#[inline]
|
|
fn end(self) -> Result<()> {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl<'a, O: Options> serde::ser::SerializeTupleStruct for SizeCompound<'a, O> {
|
|
type Ok = ();
|
|
type Error = Error;
|
|
|
|
#[inline]
|
|
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<()>
|
|
where
|
|
T: serde::ser::Serialize,
|
|
{
|
|
value.serialize(&mut *self.ser)
|
|
}
|
|
|
|
#[inline]
|
|
fn end(self) -> Result<()> {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl<'a, O: Options> serde::ser::SerializeTupleVariant for SizeCompound<'a, O> {
|
|
type Ok = ();
|
|
type Error = Error;
|
|
|
|
#[inline]
|
|
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<()>
|
|
where
|
|
T: serde::ser::Serialize,
|
|
{
|
|
value.serialize(&mut *self.ser)
|
|
}
|
|
|
|
#[inline]
|
|
fn end(self) -> Result<()> {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl<'a, O: Options + 'a> serde::ser::SerializeMap for SizeCompound<'a, O> {
|
|
type Ok = ();
|
|
type Error = Error;
|
|
|
|
#[inline]
|
|
fn serialize_key<K: ?Sized>(&mut self, value: &K) -> Result<()>
|
|
where
|
|
K: serde::ser::Serialize,
|
|
{
|
|
value.serialize(&mut *self.ser)
|
|
}
|
|
|
|
#[inline]
|
|
fn serialize_value<V: ?Sized>(&mut self, value: &V) -> Result<()>
|
|
where
|
|
V: serde::ser::Serialize,
|
|
{
|
|
value.serialize(&mut *self.ser)
|
|
}
|
|
|
|
#[inline]
|
|
fn end(self) -> Result<()> {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl<'a, O: Options> serde::ser::SerializeStruct for SizeCompound<'a, O> {
|
|
type Ok = ();
|
|
type Error = Error;
|
|
|
|
#[inline]
|
|
fn serialize_field<T: ?Sized>(&mut self, _key: &'static str, value: &T) -> Result<()>
|
|
where
|
|
T: serde::ser::Serialize,
|
|
{
|
|
value.serialize(&mut *self.ser)
|
|
}
|
|
|
|
#[inline]
|
|
fn end(self) -> Result<()> {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
impl<'a, O: Options> serde::ser::SerializeStructVariant for SizeCompound<'a, O> {
|
|
type Ok = ();
|
|
type Error = Error;
|
|
|
|
#[inline]
|
|
fn serialize_field<T: ?Sized>(&mut self, _key: &'static str, value: &T) -> Result<()>
|
|
where
|
|
T: serde::ser::Serialize,
|
|
{
|
|
value.serialize(&mut *self.ser)
|
|
}
|
|
|
|
#[inline]
|
|
fn end(self) -> Result<()> {
|
|
Ok(())
|
|
}
|
|
}
|
|
const TAG_CONT: u8 = 0b1000_0000;
|
|
const TAG_TWO_B: u8 = 0b1100_0000;
|
|
const TAG_THREE_B: u8 = 0b1110_0000;
|
|
const TAG_FOUR_B: u8 = 0b1111_0000;
|
|
const MAX_ONE_B: u32 = 0x80;
|
|
const MAX_TWO_B: u32 = 0x800;
|
|
const MAX_THREE_B: u32 = 0x10000;
|
|
|
|
fn encode_utf8(c: char) -> EncodeUtf8 {
|
|
let code = c as u32;
|
|
let mut buf = [0; 4];
|
|
let pos = if code < MAX_ONE_B {
|
|
buf[3] = code as u8;
|
|
3
|
|
} else if code < MAX_TWO_B {
|
|
buf[2] = (code >> 6 & 0x1F) as u8 | TAG_TWO_B;
|
|
buf[3] = (code & 0x3F) as u8 | TAG_CONT;
|
|
2
|
|
} else if code < MAX_THREE_B {
|
|
buf[1] = (code >> 12 & 0x0F) as u8 | TAG_THREE_B;
|
|
buf[2] = (code >> 6 & 0x3F) as u8 | TAG_CONT;
|
|
buf[3] = (code & 0x3F) as u8 | TAG_CONT;
|
|
1
|
|
} else {
|
|
buf[0] = (code >> 18 & 0x07) as u8 | TAG_FOUR_B;
|
|
buf[1] = (code >> 12 & 0x3F) as u8 | TAG_CONT;
|
|
buf[2] = (code >> 6 & 0x3F) as u8 | TAG_CONT;
|
|
buf[3] = (code & 0x3F) as u8 | TAG_CONT;
|
|
0
|
|
};
|
|
EncodeUtf8 { buf, pos }
|
|
}
|
|
|
|
struct EncodeUtf8 {
|
|
buf: [u8; 4],
|
|
pos: usize,
|
|
}
|
|
|
|
impl EncodeUtf8 {
|
|
fn as_slice(&self) -> &[u8] {
|
|
&self.buf[self.pos..]
|
|
}
|
|
}
|