diff options
Diffstat (limited to 'src/ser/part.rs')
| -rw-r--r-- | src/ser/part.rs | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/src/ser/part.rs b/src/ser/part.rs new file mode 100644 index 0000000..e720314 --- /dev/null +++ b/src/ser/part.rs @@ -0,0 +1,229 @@ +use dtoa; +use itoa; +use ser::Error; +use ser::void::VoidSerializer; +use serde::ser; +use std::str; + +pub struct PartSerializer<S> { + sink: S, +} + +impl<S: Sink> PartSerializer<S> { + pub fn new(sink: S) -> Self { + PartSerializer { sink: sink } + } +} + +pub trait Sink: Sized { + type Ok; + + fn serialize_static_str(self, + value: &'static str) + -> Result<Self::Ok, Error>; + + fn serialize_str(self, value: &str) -> Result<Self::Ok, Error>; + fn serialize_string(self, value: String) -> Result<Self::Ok, Error>; + fn serialize_none(self) -> Result<Self::Ok, Error>; + + fn serialize_some<T: ?Sized + ser::Serialize> + (self, + value: &T) + -> Result<Self::Ok, Error>; + + fn unsupported(self) -> Error; +} + +impl<S: Sink> ser::Serializer for PartSerializer<S> { + type Ok = S::Ok; + type Error = Error; + type SerializeSeq = VoidSerializer<S::Ok>; + type SerializeTuple = VoidSerializer<S::Ok>; + type SerializeTupleStruct = VoidSerializer<S::Ok>; + type SerializeTupleVariant = VoidSerializer<S::Ok>; + type SerializeMap = VoidSerializer<S::Ok>; + type SerializeStruct = VoidSerializer<S::Ok>; + type SerializeStructVariant = VoidSerializer<S::Ok>; + + fn serialize_bool(self, v: bool) -> Result<S::Ok, Error> { + self.sink.serialize_static_str(if v { "true" } else { "false" }) + } + + fn serialize_i8(self, v: i8) -> Result<S::Ok, Error> { + self.serialize_integer(v) + } + + fn serialize_i16(self, v: i16) -> Result<S::Ok, Error> { + self.serialize_integer(v) + } + + fn serialize_i32(self, v: i32) -> Result<S::Ok, Error> { + self.serialize_integer(v) + } + + fn serialize_i64(self, v: i64) -> Result<S::Ok, Error> { + self.serialize_integer(v) + } + + fn serialize_u8(self, v: u8) -> Result<S::Ok, Error> { + self.serialize_integer(v) + } + + fn serialize_u16(self, v: u16) -> Result<S::Ok, Error> { + self.serialize_integer(v) + } + + fn serialize_u32(self, v: u32) -> Result<S::Ok, Error> { + self.serialize_integer(v) + } + + fn serialize_u64(self, v: u64) -> Result<S::Ok, Error> { + self.serialize_integer(v) + } + + fn serialize_f32(self, v: f32) -> Result<S::Ok, Error> { + self.serialize_floating(v) + } + + fn serialize_f64(self, v: f64) -> Result<S::Ok, Error> { + self.serialize_floating(v) + } + + fn serialize_char(self, v: char) -> Result<S::Ok, Error> { + self.sink.serialize_string(v.to_string()) + } + + fn serialize_str(self, value: &str) -> Result<S::Ok, Error> { + self.sink.serialize_str(value) + } + + fn serialize_bytes(self, value: &[u8]) -> Result<S::Ok, Error> { + match str::from_utf8(value) { + Ok(value) => self.sink.serialize_str(value), + Err(err) => Err(Error::Utf8(err)), + } + } + + fn serialize_unit(self) -> Result<S::Ok, Error> { + Err(self.sink.unsupported()) + } + + fn serialize_unit_struct(self, name: &'static str) -> Result<S::Ok, Error> { + self.sink.serialize_static_str(name.into()) + } + + fn serialize_unit_variant(self, + _name: &'static str, + _variant_index: usize, + variant: &'static str) + -> Result<S::Ok, Error> { + self.sink.serialize_static_str(variant.into()) + } + + fn serialize_newtype_struct<T: ?Sized + ser::Serialize> + (self, + _name: &'static str, + value: &T) + -> Result<S::Ok, Error> { + value.serialize(self) + } + + fn serialize_newtype_variant<T: ?Sized + ser::Serialize> + (self, + _name: &'static str, + _variant_index: usize, + _variant: &'static str, + _value: &T) + -> Result<S::Ok, Error> { + Err(self.sink.unsupported()) + } + + fn serialize_none(self) -> Result<S::Ok, Error> { + self.sink.serialize_none() + } + + fn serialize_some<T: ?Sized + ser::Serialize>(self, + value: &T) + -> Result<S::Ok, Error> { + self.sink.serialize_some(value) + } + + fn serialize_seq(self, + _len: Option<usize>) + -> Result<Self::SerializeSeq, Error> { + Err(self.sink.unsupported()) + } + + + fn serialize_seq_fixed_size(self, + _len: usize) + -> Result<Self::SerializeSeq, Error> { + Err(self.sink.unsupported()) + } + + fn serialize_tuple(self, + _len: usize) + -> Result<Self::SerializeTuple, Error> { + Err(self.sink.unsupported()) + } + + fn serialize_tuple_struct(self, + _name: &'static str, + _len: usize) + -> Result<Self::SerializeTuple, Error> { + Err(self.sink.unsupported()) + } + + fn serialize_tuple_variant + (self, + _name: &'static str, + _variant_index: usize, + _variant: &'static str, + _len: usize) + -> Result<Self::SerializeTupleVariant, Error> { + Err(self.sink.unsupported()) + } + + fn serialize_map(self, + _len: Option<usize>) + -> Result<Self::SerializeMap, Error> { + Err(self.sink.unsupported()) + } + + fn serialize_struct(self, + _name: &'static str, + _len: usize) + -> Result<Self::SerializeStruct, Error> { + Err(self.sink.unsupported()) + } + + fn serialize_struct_variant + (self, + _name: &'static str, + _variant_index: usize, + _variant: &'static str, + _len: usize) + -> Result<Self::SerializeStructVariant, Error> { + Err(self.sink.unsupported()) + } +} + +impl<S: Sink> PartSerializer<S> { + fn serialize_integer<I>(self, value: I) -> Result<S::Ok, Error> + where I: itoa::Integer + { + let mut buf = [b'\0'; 20]; + let len = itoa::write(&mut buf[..], value).unwrap(); + let part = unsafe { str::from_utf8_unchecked(&buf[0..len]) }; + ser::Serializer::serialize_str(self, part) + } + + fn serialize_floating<F>(self, value: F) -> Result<S::Ok, Error> + where F: dtoa::Floating + { + let mut buf = [b'\0'; 24]; + let len = dtoa::write(&mut buf[..], value).unwrap(); + let part = unsafe { str::from_utf8_unchecked(&buf[0..len]) }; + ser::Serializer::serialize_str(self, part) + } +} |