1 files changed, 443 insertions, 0 deletions
diff --git a/src/value/ser.rs b/src/value/ser.rs
new file mode 100644
index 0000000..347aae9
--- /dev/null
+++ b/src/value/ser.rs
@@ -0,0 +1,443 @@
+// 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)
+}