#[cfg(not(feature = "std"))]
use alloc::collections::TryReserveError;
#[cfg(not(feature = "std"))]
use alloc::vec::Vec;
#[cfg(feature = "std")]
use std::collections::TryReserveError;
pub use cbor4ii::core::utils::BufWriter;
#[cfg(feature = "std")]
use cbor4ii::core::utils::IoWriter;
use cbor4ii::core::{
enc::{self, Encode},
types,
};
use cid::serde::CID_SERDE_PRIVATE_IDENTIFIER;
use serde::{ser, Serialize};
use crate::error::EncodeError;
use crate::CBOR_TAGS_CID;
pub fn to_vec<T>(value: &T) -> Result<Vec<u8>, EncodeError<TryReserveError>>
where
T: Serialize + ?Sized,
{
let writer = BufWriter::new(Vec::new());
let mut serializer = Serializer::new(writer);
value.serialize(&mut serializer)?;
Ok(serializer.into_inner().into_inner())
}
#[cfg(feature = "std")]
pub fn to_writer<W, T>(writer: W, value: &T) -> Result<(), EncodeError<std::io::Error>>
where
W: std::io::Write,
T: Serialize,
{
let mut serializer = Serializer::new(IoWriter::new(writer));
value.serialize(&mut serializer)
}
struct Serializer<W> {
writer: W,
}
impl<W> Serializer<W> {
pub fn new(writer: W) -> Serializer<W> {
Serializer { writer }
}
pub fn into_inner(self) -> W {
self.writer
}
}
impl<'a, W: enc::Write> serde::Serializer for &'a mut Serializer<W> {
type Ok = ();
type Error = EncodeError<W::Error>;
type SerializeSeq = Collect<'a, W>;
type SerializeTuple = BoundedCollect<'a, W>;
type SerializeTupleStruct = BoundedCollect<'a, W>;
type SerializeTupleVariant = BoundedCollect<'a, W>;
type SerializeMap = Collect<'a, W>;
type SerializeStruct = BoundedCollect<'a, W>;
type SerializeStructVariant = BoundedCollect<'a, W>;
#[inline]
fn serialize_bool(self, v: bool) -> Result<Self::Ok, Self::Error> {
v.encode(&mut self.writer)?;
Ok(())
}
#[inline]
fn serialize_i8(self, v: i8) -> Result<Self::Ok, Self::Error> {
v.encode(&mut self.writer)?;
Ok(())
}
#[inline]
fn serialize_i16(self, v: i16) -> Result<Self::Ok, Self::Error> {
v.encode(&mut self.writer)?;
Ok(())
}
#[inline]
fn serialize_i32(self, v: i32) -> Result<Self::Ok, Self::Error> {
v.encode(&mut self.writer)?;
Ok(())
}
#[inline]
fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error> {
v.encode(&mut self.writer)?;
Ok(())
}
#[inline]
fn serialize_u8(self, v: u8) -> Result<Self::Ok, Self::Error> {
v.encode(&mut self.writer)?;
Ok(())
}
#[inline]
fn serialize_u16(self, v: u16) -> Result<Self::Ok, Self::Error> {
v.encode(&mut self.writer)?;
Ok(())
}
#[inline]
fn serialize_u32(self, v: u32) -> Result<Self::Ok, Self::Error> {
v.encode(&mut self.writer)?;
Ok(())
}
#[inline]
fn serialize_u64(self, v: u64) -> Result<Self::Ok, Self::Error> {
v.encode(&mut self.writer)?;
Ok(())
}
#[inline]
fn serialize_f32(self, v: f32) -> Result<Self::Ok, Self::Error> {
self.serialize_f64(f64::from(v))
}
#[inline]
fn serialize_f64(self, v: f64) -> Result<Self::Ok, Self::Error> {
if !v.is_finite() {
Err(EncodeError::Msg(
"Float must be a finite number, not Infinity or NaN".into(),
))
} else {
v.encode(&mut self.writer)?;
Ok(())
}
}
#[inline]
fn serialize_char(self, v: char) -> Result<Self::Ok, Self::Error> {
let mut buf = [0; 4];
self.serialize_str(v.encode_utf8(&mut buf))
}
#[inline]
fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
v.encode(&mut self.writer)?;
Ok(())
}
#[inline]
fn serialize_bytes(self, v: &[u8]) -> Result<Self::Ok, Self::Error> {
types::Bytes(v).encode(&mut self.writer)?;
Ok(())
}
#[inline]
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
types::Null.encode(&mut self.writer)?;
Ok(())
}
#[inline]
fn serialize_some<T: Serialize + ?Sized>(self, value: &T) -> Result<Self::Ok, Self::Error> {
value.serialize(self)
}
#[inline]
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
types::Null.encode(&mut self.writer)?;
Ok(())
}
#[inline]
fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
self.serialize_unit()
}
#[inline]
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
) -> Result<Self::Ok, Self::Error> {
self.serialize_str(variant)
}
#[inline]
fn serialize_newtype_struct<T: Serialize + ?Sized>(
self,
name: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error> {
if name == CID_SERDE_PRIVATE_IDENTIFIER {
value.serialize(&mut CidSerializer(self))
} else {
value.serialize(self)
}
}
#[inline]
fn serialize_newtype_variant<T: Serialize + ?Sized>(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
value: &T,
) -> Result<Self::Ok, Self::Error> {
enc::MapStartBounded(1).encode(&mut self.writer)?;
variant.encode(&mut self.writer)?;
value.serialize(self)
}
#[inline]
fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
if let Some(len) = len {
enc::ArrayStartBounded(len).encode(&mut self.writer)?;
} else {
enc::ArrayStartUnbounded.encode(&mut self.writer)?;
}
Ok(Collect {
bounded: len.is_some(),
ser: self,
})
}
#[inline]
fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple, Self::Error> {
enc::ArrayStartBounded(len).encode(&mut self.writer)?;
Ok(BoundedCollect { ser: self })
}
#[inline]
fn serialize_tuple_struct(
self,
_name: &'static str,
len: usize,
) -> Result<Self::SerializeTupleStruct, Self::Error> {
self.serialize_tuple(len)
}
#[inline]
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
len: usize,
) -> Result<Self::SerializeTupleVariant, Self::Error> {
enc::MapStartBounded(1).encode(&mut self.writer)?;
variant.encode(&mut self.writer)?;
enc::ArrayStartBounded(len).encode(&mut self.writer)?;
Ok(BoundedCollect { ser: self })
}
#[inline]
fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
if let Some(len) = len {
enc::MapStartBounded(len).encode(&mut self.writer)?;
} else {
enc::MapStartUnbounded.encode(&mut self.writer)?;
}
Ok(Collect {
bounded: len.is_some(),
ser: self,
})
}
#[inline]
fn serialize_struct(
self,
_name: &'static str,
len: usize,
) -> Result<Self::SerializeStruct, Self::Error> {
enc::MapStartBounded(len).encode(&mut self.writer)?;
Ok(BoundedCollect { ser: self })
}
#[inline]
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
len: usize,
) -> Result<Self::SerializeStructVariant, Self::Error> {
enc::MapStartBounded(1).encode(&mut self.writer)?;
variant.encode(&mut self.writer)?;
enc::MapStartBounded(len).encode(&mut self.writer)?;
Ok(BoundedCollect { ser: self })
}
#[inline]
fn serialize_i128(self, v: i128) -> Result<Self::Ok, Self::Error> {
if !(u64::MAX as i128 >= v && -(u64::MAX as i128 + 1) <= v) {
return Err(EncodeError::Msg(
"Integer must be within [-u64::MAX-1, u64::MAX] range".into(),
));
}
v.encode(&mut self.writer)?;
Ok(())
}
#[inline]
fn serialize_u128(self, v: u128) -> Result<Self::Ok, Self::Error> {
if (u64::MAX as u128) < v {
return Err(EncodeError::Msg(
"Unsigned integer must be within [0, u64::MAX] range".into(),
));
}
v.encode(&mut self.writer)?;
Ok(())
}
fn collect_map<K, V, I>(self, iter: I) -> Result<(), Self::Error>
where
K: ser::Serialize,
V: ser::Serialize,
I: IntoIterator<Item = (K, V)>,
{
let mut buffer = BufWriter::new(Vec::new());
let mut entries = Vec::new();
for (key, value) in iter {
let mut mem_serializer = Serializer::new(&mut buffer);
key.serialize(&mut mem_serializer)
.map_err(|_| EncodeError::Msg("Map key cannot be serialized.".into()))?;
value
.serialize(&mut mem_serializer)
.map_err(|_| EncodeError::Msg("Map key cannot be serialized.".into()))?;
entries.push(buffer.buffer().to_vec());
buffer.clear();
}
enc::MapStartBounded(entries.len()).encode(&mut self.writer)?;
entries.sort_unstable();
for entry in entries {
self.writer.push(&entry)?;
}
Ok(())
}
#[inline]
fn is_human_readable(&self) -> bool {
false
}
}
struct Collect<'a, W> {
bounded: bool,
ser: &'a mut Serializer<W>,
}
struct BoundedCollect<'a, W> {
ser: &'a mut Serializer<W>,
}
impl<W: enc::Write> serde::ser::SerializeSeq for Collect<'_, W> {
type Ok = ();
type Error = EncodeError<W::Error>;
#[inline]
fn serialize_element<T: Serialize + ?Sized>(&mut self, value: &T) -> Result<(), Self::Error> {
value.serialize(&mut *self.ser)
}
#[inline]
fn end(self) -> Result<Self::Ok, Self::Error> {
if !self.bounded {
enc::End.encode(&mut self.ser.writer)?;
}
Ok(())
}
}
impl<W: enc::Write> serde::ser::SerializeTuple for BoundedCollect<'_, W> {
type Ok = ();
type Error = EncodeError<W::Error>;
#[inline]
fn serialize_element<T: Serialize + ?Sized>(&mut self, value: &T) -> Result<(), Self::Error> {
value.serialize(&mut *self.ser)
}
#[inline]
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(())
}
}
impl<W: enc::Write> serde::ser::SerializeTupleStruct for BoundedCollect<'_, W> {
type Ok = ();
type Error = EncodeError<W::Error>;
#[inline]
fn serialize_field<T: Serialize + ?Sized>(&mut self, value: &T) -> Result<(), Self::Error> {
value.serialize(&mut *self.ser)
}
#[inline]
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(())
}
}
impl<W: enc::Write> serde::ser::SerializeTupleVariant for BoundedCollect<'_, W> {
type Ok = ();
type Error = EncodeError<W::Error>;
#[inline]
fn serialize_field<T: Serialize + ?Sized>(&mut self, value: &T) -> Result<(), Self::Error> {
value.serialize(&mut *self.ser)
}
#[inline]
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(())
}
}
impl<W: enc::Write> serde::ser::SerializeMap for Collect<'_, W> {
type Ok = ();
type Error = EncodeError<W::Error>;
#[inline]
fn serialize_key<T: Serialize + ?Sized>(&mut self, key: &T) -> Result<(), Self::Error> {
key.serialize(&mut *self.ser)
}
#[inline]
fn serialize_value<T: Serialize + ?Sized>(&mut self, value: &T) -> Result<(), Self::Error> {
value.serialize(&mut *self.ser)
}
#[inline]
fn end(self) -> Result<Self::Ok, Self::Error> {
if !self.bounded {
enc::End.encode(&mut self.ser.writer)?;
}
Ok(())
}
}
impl<W: enc::Write> serde::ser::SerializeStruct for BoundedCollect<'_, W> {
type Ok = ();
type Error = EncodeError<W::Error>;
#[inline]
fn serialize_field<T: Serialize + ?Sized>(
&mut self,
key: &'static str,
value: &T,
) -> Result<(), Self::Error> {
key.serialize(&mut *self.ser)?;
value.serialize(&mut *self.ser)
}
#[inline]
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(())
}
}
impl<W: enc::Write> serde::ser::SerializeStructVariant for BoundedCollect<'_, W> {
type Ok = ();
type Error = EncodeError<W::Error>;
#[inline]
fn serialize_field<T: Serialize + ?Sized>(
&mut self,
key: &'static str,
value: &T,
) -> Result<(), Self::Error> {
key.serialize(&mut *self.ser)?;
value.serialize(&mut *self.ser)
}
#[inline]
fn end(self) -> Result<Self::Ok, Self::Error> {
Ok(())
}
}
struct CidSerializer<'a, W>(&'a mut Serializer<W>);
impl<'a, W: enc::Write> ser::Serializer for &'a mut CidSerializer<'a, W>
where
W::Error: core::fmt::Debug,
{
type Ok = ();
type Error = EncodeError<W::Error>;
type SerializeSeq = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTuple = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleStruct = ser::Impossible<Self::Ok, Self::Error>;
type SerializeTupleVariant = ser::Impossible<Self::Ok, Self::Error>;
type SerializeMap = ser::Impossible<Self::Ok, Self::Error>;
type SerializeStruct = ser::Impossible<Self::Ok, Self::Error>;
type SerializeStructVariant = ser::Impossible<Self::Ok, Self::Error>;
fn serialize_bool(self, _value: bool) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_i8(self, _value: i8) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_i16(self, _value: i16) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_i32(self, _value: i32) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_i64(self, _value: i64) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_u8(self, _value: u8) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_u16(self, _value: u16) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_u32(self, _value: u32) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_u64(self, _value: u64) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_f32(self, _value: f32) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_f64(self, _value: f64) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_char(self, _value: char) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_str(self, _value: &str) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_bytes(self, value: &[u8]) -> Result<Self::Ok, Self::Error> {
let prefixed = [&[0x00], value].concat();
types::Tag(CBOR_TAGS_CID, types::Bytes(&prefixed[..])).encode(&mut self.0.writer)?;
Ok(())
}
fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_some<T: ?Sized + ser::Serialize>(
self,
_value: &T,
) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_unit_struct(self, _name: &str) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_unit_variant(
self,
_name: &str,
_variant_index: u32,
_variant: &str,
) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_newtype_struct<T: ?Sized + ser::Serialize>(
self,
_name: &str,
_value: &T,
) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_newtype_variant<T: ?Sized + ser::Serialize>(
self,
_name: &str,
_variant_index: u32,
_variant: &str,
_value: &T,
) -> Result<Self::Ok, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_tuple_struct(
self,
_name: &str,
_len: usize,
) -> Result<Self::SerializeTupleStruct, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_tuple_variant(
self,
_name: &str,
_variant_index: u32,
_variant: &str,
_len: usize,
) -> Result<Self::SerializeTupleVariant, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_struct(
self,
_name: &str,
_len: usize,
) -> Result<Self::SerializeStruct, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
fn serialize_struct_variant(
self,
_name: &str,
_variant_index: u32,
_variant: &str,
_len: usize,
) -> Result<Self::SerializeStructVariant, Self::Error> {
Err(ser::Error::custom("unreachable"))
}
}