// Copyright 2017 Serde Developers
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
//
http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or
http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use std::collections::BTreeMap;
use crate::error::Error;
use serde::{self, Serialize};
use crate::tags::Tagged;
use crate::value::Value;
impl serde::Serialize for Value {
#[inline]
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
match *self {
Value::Integer(v) => serializer.serialize_i128(v),
Value::Bytes(ref v) => serializer.serialize_bytes(&v),
Value::Text(ref v) => serializer.serialize_str(&v),
Value::Array(ref v) => v.serialize(serializer),
Value::Map(ref v) => v.serialize(serializer),
Value::Tag(tag, ref v) => Tagged::new(Some(tag), v).serialize(serializer),
Value::Float(v) => serializer.serialize_f64(v),
Value::Bool(v) => serializer.serialize_bool(v),
Value::Null => serializer.serialize_unit(),
Value::__Hidden => unreachable!(),
}
}
}
struct Serializer;
impl serde::Serializer for Serializer {
type Ok = Value;
type Error = Error;
type SerializeSeq = SerializeVec;
type SerializeTuple = SerializeVec;
type SerializeTupleStruct = SerializeVec;
type SerializeTupleVariant = SerializeTupleVariant;
type SerializeMap = SerializeMap;
type SerializeStruct = SerializeMap;
type SerializeStructVariant = SerializeStructVariant;
#[inline]
fn serialize_bool(self, value: bool) -> Result<Value, Error> {
Ok(Value::Bool(value))
}
#[inline]
fn serialize_i8(self, value: i8) -> Result<Value, Error> {
self.serialize_i64(i64::from(value))
}
#[inline]
fn serialize_i16(self, value: i16) -> Result<Value, Error> {
self.serialize_i64(i64::from(value))
}
#[inline]
fn serialize_i32(self, value: i32) -> Result<Value, Error> {
self.serialize_i64(i64::from(value))
}
#[inline]
fn serialize_i64(self, value: i64) -> Result<Value, Error> {
self.serialize_i128(i128::from(value))
}
fn serialize_i128(self, value: i128) -> Result<Value, Error> {
Ok(Value::Integer(value))
}
#[inline]
fn serialize_u8(self, value: u8) -> Result<Value, Error> {
self.serialize_u64(u64::from(value))
}
#[inline]
fn serialize_u16(self, value: u16) -> Result<Value, Error> {
self.serialize_u64(u64::from(value))
}
#[inline]
fn serialize_u32(self, value: u32) -> Result<Value, Error> {
self.serialize_u64(u64::from(value))
}
#[inline]
fn serialize_u64(self, value: u64) -> Result<Value, Error> {
Ok(Value::Integer(value.into()))
}
#[inline]
fn serialize_f32(self, value: f32) -> Result<Value, Error> {
self.serialize_f64(f64::from(value))
}
#[inline]
fn serialize_f64(self, value: f64) -> Result<Value, Error> {
Ok(Value::Float(value))
}
#[inline]
fn serialize_char(self, value: char) -> Result<Value, Error> {
let mut s = String::new();
s.push(value);
self.serialize_str(&s)
}
#[inline]
fn serialize_str(self, value: &str) -> Result<Value, Error> {
Ok(Value::Text(value.to_owned()))
}
fn serialize_bytes(self, value: &[u8]) -> Result<Value, Error> {
Ok(Value::Bytes(value.to_vec()))
}
#[inline]
fn serialize_unit(self) -> Result<Value, Error> {
Ok(Value::Null)
}
#[inline]
fn serialize_unit_struct(self, _name: &'static str) -> Result<Value, Error> {
self.serialize_unit()
}
#[inline]
fn serialize_unit_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
) -> Result<Value, Error> {
self.serialize_str(variant)
}
#[inline]
fn serialize_newtype_struct<T: ?Sized>(
self,
_name: &'static str,
value: &T,
) -> Result<Value, Error>
where
T: Serialize,
{
value.serialize(self)
}
fn serialize_newtype_variant<T: ?Sized>(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
value: &T,
) -> Result<Value, Error>
where
T: Serialize,
{
let mut values = BTreeMap::new();
values.insert(Value::from(variant.to_owned()), to_value(&value)?);
Ok(Value::Map(values))
}
#[inline]
fn serialize_none(self) -> Result<Value, Error> {
self.serialize_unit()
}
#[inline]
fn serialize_some<T: ?Sized>(self, value: &T) -> Result<Value, Error>
where
T: Serialize,
{
value.serialize(self)
}
fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, Error> {
Ok(SerializeVec {
vec: Vec::with_capacity(len.unwrap_or(0)),
})
}
fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple, Error> {
self.serialize_seq(Some(len))
}
fn serialize_tuple_struct(
self,
_name: &'static str,
len: usize,
) -> Result<Self::SerializeTupleStruct, Error> {
self.serialize_tuple(len)
}
fn serialize_tuple_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
len: usize,
) -> Result<Self::SerializeTupleVariant, Error> {
Ok(SerializeTupleVariant {
name: String::from(variant),
vec: Vec::with_capacity(len),
})
}
fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Error> {
Ok(SerializeMap {
map: BTreeMap::new(),
next_key: None,
})
}
fn serialize_struct(
self,
_name: &'static str,
len: usize,
) -> Result<Self::SerializeStruct, Error> {
self.serialize_map(Some(len))
}
fn serialize_struct_variant(
self,
_name: &'static str,
_variant_index: u32,
variant: &'static str,
_len: usize,
) -> Result<Self::SerializeStructVariant, Error> {
Ok(SerializeStructVariant {
name: String::from(variant),
map: BTreeMap::new(),
})
}
#[inline]
fn is_human_readable(&self) -> bool {
false
}
}
pub struct SerializeVec {
vec: Vec<Value>,
}
pub struct SerializeTupleVariant {
name: String,
vec: Vec<Value>,
}
pub struct SerializeMap {
map: BTreeMap<Value, Value>,
next_key: Option<Value>,
}
pub struct SerializeStructVariant {
name: String,
map: BTreeMap<Value, Value>,
}
impl serde::ser::SerializeSeq for SerializeVec {
type Ok = Value;
type Error = Error;
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
where
T: Serialize,
{
self.vec.push(to_value(&value)?);
Ok(())
}
fn end(self) -> Result<Value, Error> {
Ok(Value::Array(self.vec))
}
}
impl serde::ser::SerializeTuple for SerializeVec {
type Ok = Value;
type Error = Error;
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
where
T: Serialize,
{
serde::ser::SerializeSeq::serialize_element(self, value)
}
fn end(self) -> Result<Value, Error> {
serde::ser::SerializeSeq::end(self)
}
}
impl serde::ser::SerializeTupleStruct for SerializeVec {
type Ok = Value;
type Error = Error;
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
where
T: Serialize,
{
serde::ser::SerializeSeq::serialize_element(self, value)
}
fn end(self) -> Result<Value, Error> {
serde::ser::SerializeSeq::end(self)
}
}
impl serde::ser::SerializeTupleVariant for SerializeTupleVariant {
type Ok = Value;
type Error = Error;
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
where
T: Serialize,
{
self.vec.push(to_value(&value)?);
Ok(())
}
fn end(self) -> Result<Value, Error> {
let mut object = BTreeMap::new();
object.insert(Value::from(self.name), Value::Array(self.vec));
Ok(Value::Map(object))
}
}
impl serde::ser::SerializeMap for SerializeMap {
type Ok = Value;
type Error = Error;
fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Error>
where
T: Serialize,
{
self.next_key = Some(to_value(&key)?);
Ok(())
}
fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
where
T: Serialize,
{
let key = self.next_key.take();
// Panic because this indicates a bug in the program rather than an
// expected failure.
let key = key.expect("serialize_value called before serialize_key");
self.map.insert(key, to_value(&value)?);
Ok(())
}
fn end(self) -> Result<Value, Error> {
Ok(Value::Map(self.map))
}
}
impl serde::ser::SerializeStruct for SerializeMap {
type Ok = Value;
type Error = Error;
fn serialize_field<T: ?Sized>(&mut self, key: &'static str, value: &T) -> Result<(), Error>
where
T: Serialize,
{
serde::ser::SerializeMap::serialize_key(self, key)?;
serde::ser::SerializeMap::serialize_value(self, value)
}
fn end(self) -> Result<Value, Error> {
serde::ser::SerializeMap::end(self)
}
}
impl serde::ser::SerializeStructVariant for SerializeStructVariant {
type Ok = Value;
type Error = Error;
fn serialize_field<T: ?Sized>(&mut self, key: &'static str, value: &T) -> Result<(), Error>
where
T: Serialize,
{
self.map
.insert(Value::from(String::from(key)), to_value(&value)?);
Ok(())
}
fn end(self) -> Result<Value, Error> {
let mut object = BTreeMap::new();
object.insert(Value::from(self.name), Value::Map(self.map));
Ok(Value::Map(object))
}
}
/// Convert a `T` into `serde_cbor::Value` which is an enum that can represent
/// any valid CBOR data.
///
/// ```rust
/// extern crate serde;
///
/// #[macro_use]
/// extern crate serde_derive;
/// extern crate serde_cbor;
///
/// use std::error::Error;
///
/// #[derive(Serialize)]
/// struct User {
/// fingerprint: String,
/// location: String,
/// }
///
/// fn main() {
/// let u = User {
/// fingerprint: "0xF9BA143B95FF6D82".to_owned(),
/// location: "Menlo Park, CA".to_owned(),
/// };
///
/// let v = serde_cbor::value::to_value(u).unwrap();
/// }
/// ```
#[allow(clippy::needless_pass_by_value)]
// Taking by value is more friendly to iterator adapters, option and result
pub fn to_value<T>(value: T) -> Result<Value, Error>
where
T: Serialize,
{
value.serialize(Serializer)
}
