From b30b7ced244b71eb7c69fec7ebe65071227ed12b Mon Sep 17 00:00:00 2001 From: SanmerDev Date: Thu, 8 Feb 2024 20:03:02 +0800 Subject: [PATCH] Initial commit --- .github/workflows/rust.yml | 32 +++ .gitignore | 10 + Cargo.toml | 13 + LICENSE-APACHE | 201 +++++++++++++ LICENSE-MIT | 21 ++ src/de.rs | 455 +++++++++++++++++++++++++++++ src/error.rs | 60 ++++ src/lib.rs | 8 + src/read.rs | 85 ++++++ src/ser.rs | 575 +++++++++++++++++++++++++++++++++++++ tests/test.rs | 59 ++++ 11 files changed, 1519 insertions(+) create mode 100644 .github/workflows/rust.yml create mode 100644 .gitignore create mode 100644 Cargo.toml create mode 100644 LICENSE-APACHE create mode 100644 LICENSE-MIT create mode 100644 src/de.rs create mode 100644 src/error.rs create mode 100644 src/lib.rs create mode 100644 src/read.rs create mode 100644 src/ser.rs create mode 100644 tests/test.rs diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml new file mode 100644 index 0000000..a8d7a8b --- /dev/null +++ b/.github/workflows/rust.yml @@ -0,0 +1,32 @@ +name: Rust + +on: + push: + branches: [ "main" ] + pull_request: + branches: [ "main" ] + +env: + CARGO_TERM_COLOR: always + RUST_BACKTRACE: 1 + +jobs: + test: + name: Test on ${{ matrix.os }} + runs-on: ${{ matrix.os }} + strategy: + fail-fast: false + matrix: + os: [ubuntu-latest, windows-latest, macos-latest] + + steps: + - name: Checkout + uses: actions/checkout@v4 + with: + fetch-depth: 0 + + - name: Set up Rust + uses: actions-rust-lang/setup-rust-toolchain@v1 + + - name: Run tests + run: cargo test --all-features diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..596d063 --- /dev/null +++ b/.gitignore @@ -0,0 +1,10 @@ +# Cargo +target/ +Cargo.lock + +# IntelliJ +*.iml +.idea/ + +# MacOS +.DS_Store \ No newline at end of file diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..becfcdb --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,13 @@ +[package] +name = "serde-prop" +version = "1.0.0" +license = "MIT OR Apache-2.0" +edition = "2021" + +[dependencies] +serde = { version = "1.0", default-features = false } +itoa = "1.0" +ryu = "1.0" + +[dev-dependencies] +serde = { version = "1.0", features = ["derive"] } diff --git a/LICENSE-APACHE b/LICENSE-APACHE new file mode 100644 index 0000000..261eeb9 --- /dev/null +++ b/LICENSE-APACHE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/src/de.rs b/src/de.rs new file mode 100644 index 0000000..42472c7 --- /dev/null +++ b/src/de.rs @@ -0,0 +1,455 @@ +use core::str; +use std::str::FromStr; + +use serde::de; +use serde::de::{DeserializeSeed, Unexpected, Visitor}; + +use crate::error; +use crate::error::Result; +use crate::read::{Read, SliceRead, StrRead}; + +pub struct Deserializer { + read: R, + inner: Vec, +} + +impl<'de, R: Read<'de>> Deserializer { + pub fn new(read: R) -> Self { + Deserializer { + read, + inner: Vec::new(), + } + } +} + +impl<'a> Deserializer> { + pub fn from_slice(bytes: &'a [u8]) -> Self { + Deserializer::new(SliceRead::new(bytes)) + } +} + +impl<'a> Deserializer> { + pub fn from_str(s: &'a str) -> Self { + Deserializer::new(StrRead::new(s)) + } +} + +impl<'de, R: Read<'de>> Deserializer { + fn next_char(&mut self) -> Result> { + self.read.next() + } + + fn peek(&mut self) -> Result> { + self.read.peek() + } + + fn end(&mut self) -> Result<()> { + match self.peek()? { + Some(_) => Err(de::Error::custom("not over yet")), + None => Ok(()), + } + } + + fn parse_str(&self) -> Option<&str> { + match str::from_utf8(&self.inner).ok() { + Some("") | None => None, + Some(v) => Some(v), + } + } + + fn parse_any(&self) -> Option { + T::from_str(self.parse_str()?).ok() + } +} + +impl<'de, 'a, R: Read<'de>> de::Deserializer<'de> for &'a mut Deserializer { + type Error = error::Error; + + fn deserialize_any(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + visitor.visit_unit() + } + + fn deserialize_bool(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + match self.parse_any() { + Some(v) => visitor.visit_bool(v), + None => { + return Err(de::Error::invalid_value( + Unexpected::Str(self.parse_str().unwrap_or("")), + &"boolean", + )) + } + } + } + + fn deserialize_i8(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + self.deserialize_i64(visitor) + } + + fn deserialize_i16(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + self.deserialize_i64(visitor) + } + + fn deserialize_i32(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + self.deserialize_i64(visitor) + } + + fn deserialize_i64(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + match self.parse_any() { + Some(v) => visitor.visit_i64(v), + None => { + return Err(de::Error::invalid_value( + Unexpected::Str(self.parse_str().unwrap_or("")), + &"signed integer", + )) + } + } + } + + fn deserialize_u8(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + self.deserialize_u64(visitor) + } + + fn deserialize_u16(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + self.deserialize_u64(visitor) + } + + fn deserialize_u32(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + self.deserialize_u64(visitor) + } + + fn deserialize_u64(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + match self.parse_any() { + Some(v) => visitor.visit_u64(v), + None => { + return Err(de::Error::invalid_value( + Unexpected::Str(self.parse_str().unwrap_or("")), + &"unsigned integer", + )) + } + } + } + + fn deserialize_f32(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + self.deserialize_f64(visitor) + } + + fn deserialize_f64(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + match self.parse_any() { + Some(v) => visitor.visit_f64(v), + None => { + return Err(de::Error::invalid_value( + Unexpected::Str(self.parse_str().unwrap_or("")), + &"float", + )) + } + } + } + + fn deserialize_char(self, _visitor: V) -> Result + where + V: Visitor<'de>, + { + Err(de::Error::custom("unsupported char")) + } + + fn deserialize_str(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + match self.parse_str() { + None => Err(de::Error::invalid_length(0, &"length > 0")), + Some(v) => visitor.visit_str(v), + } + } + + fn deserialize_string(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + self.deserialize_str(visitor) + } + + fn deserialize_bytes(self, _visitor: V) -> Result + where + V: Visitor<'de>, + { + Err(de::Error::custom("unsupported bytes")) + } + + fn deserialize_byte_buf(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + self.deserialize_bytes(visitor) + } + + fn deserialize_option(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + match self.parse_str() { + None => visitor.visit_none(), + Some(_) => visitor.visit_some(self), + } + } + + fn deserialize_unit(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + match self.parse_str() { + None => visitor.visit_unit(), + Some(_) => Err(de::Error::invalid_type(Unexpected::Unit, &"unit")), + } + } + + fn deserialize_unit_struct(self, _name: &'static str, visitor: V) -> Result + where + V: Visitor<'de>, + { + self.deserialize_unit(visitor) + } + + fn deserialize_newtype_struct(self, _name: &'static str, _visitor: V) -> Result + where + V: Visitor<'de>, + { + Err(de::Error::custom("unsupported newtype struct")) + } + + fn deserialize_seq(self, _visitor: V) -> Result + where + V: Visitor<'de>, + { + Err(de::Error::custom("unsupported seq")) + } + + fn deserialize_tuple(self, _len: usize, _visitor: V) -> Result + where + V: Visitor<'de>, + { + Err(de::Error::custom("unsupported tuple")) + } + + fn deserialize_tuple_struct( + self, + _name: &'static str, + _len: usize, + _visitor: V, + ) -> Result + where + V: Visitor<'de>, + { + Err(de::Error::custom("unsupported tuple struct")) + } + + fn deserialize_map(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + visitor.visit_map(MapAccess::new(self)) + } + + fn deserialize_struct( + self, + _name: &'static str, + _fields: &'static [&'static str], + visitor: V, + ) -> Result + where + V: Visitor<'de>, + { + self.deserialize_map(visitor) + } + + fn deserialize_enum( + self, + _name: &'static str, + _variants: &'static [&'static str], + visitor: V, + ) -> Result + where + V: Visitor<'de>, + { + visitor.visit_enum(UnitVariantAccess::new(self)) + } + + fn deserialize_identifier(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + self.deserialize_str(visitor) + } + + fn deserialize_ignored_any(self, visitor: V) -> Result + where + V: Visitor<'de>, + { + self.deserialize_any(visitor) + } +} + +struct MapAccess<'a, R: 'a> { + de: &'a mut Deserializer, +} + +impl<'a, R: 'a> MapAccess<'a, R> { + fn new(de: &'a mut Deserializer) -> Self { + MapAccess { de } + } +} + +impl<'de, 'a, R: Read<'de> + 'a> de::MapAccess<'de> for MapAccess<'a, R> { + type Error = error::Error; + + fn next_key_seed(&mut self, seed: K) -> Result> + where + K: DeserializeSeed<'de>, + { + self.de.inner.clear(); + loop { + match self.de.next_char()? { + None => { + return Ok(None); + } + Some(b'=') => { + return seed.deserialize(&mut *self.de).map(Some); + } + Some(b' ') | Some(b'\n') | Some(b'\t') | Some(b'\r') => {} + Some(b) => self.de.inner.push(b), + }; + } + } + + fn next_value_seed(&mut self, seed: V) -> Result + where + V: DeserializeSeed<'de>, + { + self.de.inner.clear(); + loop { + match self.de.next_char()? { + Some(b'\n') | Some(b'\t') | Some(b'\r') | None => { + return seed.deserialize(&mut *self.de); + } + Some(b) => self.de.inner.push(b), + }; + } + } +} + +struct UnitVariantAccess<'a, R: 'a> { + de: &'a mut Deserializer, +} + +impl<'a, R: 'a> UnitVariantAccess<'a, R> { + fn new(de: &'a mut Deserializer) -> Self { + UnitVariantAccess { de } + } +} + +impl<'de, 'a, R: Read<'de> + 'a> de::EnumAccess<'de> for UnitVariantAccess<'a, R> { + type Error = error::Error; + type Variant = Self; + + fn variant_seed(self, seed: V) -> Result<(V::Value, Self)> + where + V: DeserializeSeed<'de>, + { + let variant = seed.deserialize(&mut *self.de)?; + Ok((variant, self)) + } +} + +impl<'de, 'a, R: Read<'de> + 'a> de::VariantAccess<'de> for UnitVariantAccess<'a, R> { + type Error = error::Error; + + fn unit_variant(self) -> Result<()> { + Ok(()) + } + + fn newtype_variant_seed(self, _seed: T) -> Result + where + T: DeserializeSeed<'de>, + { + Err(de::Error::invalid_type( + Unexpected::UnitVariant, + &"newtype variant", + )) + } + + fn tuple_variant(self, _len: usize, _visitor: V) -> Result + where + V: Visitor<'de>, + { + Err(de::Error::invalid_type( + Unexpected::UnitVariant, + &"tuple variant", + )) + } + + fn struct_variant(self, _fields: &'static [&'static str], _visitor: V) -> Result + where + V: Visitor<'de>, + { + Err(de::Error::invalid_type( + Unexpected::UnitVariant, + &"struct variant", + )) + } +} + +fn from_trait<'de, R, T>(read: R) -> Result +where + R: Read<'de>, + T: de::Deserialize<'de>, +{ + let mut de = Deserializer::new(read); + let value = de::Deserialize::deserialize(&mut de)?; + + de.end()?; + Ok(value) +} + +pub fn from_slice<'a, T: de::Deserialize<'a>>(v: &'a [u8]) -> Result { + from_trait(SliceRead::new(v)) +} + +pub fn from_str<'a, T: de::Deserialize<'a>>(s: &'a str) -> Result { + from_trait(StrRead::new(s)) +} diff --git a/src/error.rs b/src/error.rs new file mode 100644 index 0000000..c02de44 --- /dev/null +++ b/src/error.rs @@ -0,0 +1,60 @@ +use core::result; +use std::fmt; + +pub type Result = result::Result; + +pub struct Error { + err: Box, +} + +impl Error { + pub(crate) fn msg(msg: T) -> Self { + Error { + err: Box::new(ErrorImpl { + msg: Box::new(msg.to_string()), + }), + } + } +} + +struct ErrorImpl { + msg: Box, +} + +impl fmt::Debug for Error { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + fmt::Display::fmt(&self.err, f) + } +} + +impl fmt::Display for Error { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + fmt::Debug::fmt(self, f) + } +} + +impl fmt::Debug for ErrorImpl { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + f.write_str(&self.msg.to_string()) + } +} + +impl fmt::Display for ErrorImpl { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + fmt::Debug::fmt(&self, f) + } +} + +impl serde::de::StdError for Error {} + +impl serde::de::Error for Error { + fn custom(msg: T) -> Self { + Error::msg(msg) + } +} + +impl serde::ser::Error for Error { + fn custom(msg: T) -> Self { + Error::msg(msg) + } +} diff --git a/src/lib.rs b/src/lib.rs new file mode 100644 index 0000000..425a310 --- /dev/null +++ b/src/lib.rs @@ -0,0 +1,8 @@ +mod de; +mod error; +mod read; +mod ser; + +pub use crate::de::{from_slice, from_str, Deserializer}; +pub use crate::error::{Error, Result}; +pub use crate::ser::{to_string, to_vec, to_writer, Serializer}; diff --git a/src/read.rs b/src/read.rs new file mode 100644 index 0000000..1692535 --- /dev/null +++ b/src/read.rs @@ -0,0 +1,85 @@ +use core::str; + +use crate::error::Result; + +pub trait Read<'de> { + fn next(&mut self) -> Result>; + fn peek(&mut self) -> Result>; + fn discard(&mut self); + fn byte_offset(&self) -> usize; +} + +pub struct SliceRead<'a> { + slice: &'a [u8], + index: usize, +} + +pub struct StrRead<'a> { + delegate: SliceRead<'a>, +} + +impl<'a> SliceRead<'a> { + pub fn new(slice: &'a [u8]) -> Self { + SliceRead { slice, index: 0 } + } +} + +impl<'a> Read<'a> for SliceRead<'a> { + #[inline] + fn next(&mut self) -> Result> { + Ok(if self.index < self.slice.len() { + let ch = self.slice[self.index]; + self.index += 1; + Some(ch) + } else { + None + }) + } + + #[inline] + fn peek(&mut self) -> Result> { + Ok(if self.index < self.slice.len() { + Some(self.slice[self.index]) + } else { + None + }) + } + + #[inline] + fn discard(&mut self) { + self.index += 1; + } + + fn byte_offset(&self) -> usize { + self.index + } +} + +impl<'a> StrRead<'a> { + pub fn new(s: &'a str) -> Self { + StrRead { + delegate: SliceRead::new(s.as_bytes()), + } + } +} + +impl<'a> Read<'a> for StrRead<'a> { + #[inline] + fn next(&mut self) -> Result> { + self.delegate.next() + } + + #[inline] + fn peek(&mut self) -> Result> { + self.delegate.peek() + } + + #[inline] + fn discard(&mut self) { + self.delegate.discard(); + } + + fn byte_offset(&self) -> usize { + self.delegate.byte_offset() + } +} diff --git a/src/ser.rs b/src/ser.rs new file mode 100644 index 0000000..9ed5d18 --- /dev/null +++ b/src/ser.rs @@ -0,0 +1,575 @@ +use crate::error; +use crate::error::Result; +use serde::{ser, Serialize}; +use std::io; +use std::io::Write; + +pub struct Serializer { + writer: W, + formatter: F, +} + +impl Serializer { + #[inline] + pub fn with_formatter(writer: W, formatter: F) -> Self { + Serializer { writer, formatter } + } + + #[inline] + pub fn into_inner(self) -> W { + self.writer + } +} + +impl Serializer { + #[inline] + pub fn new(writer: W) -> Self { + Serializer::with_formatter(writer, CompactFormatter) + } +} + +pub trait Formatter { + #[inline] + fn write_null(&mut self, writer: &mut W) -> io::Result<()> + where + W: ?Sized + Write, + { + writer.write_all(b"") + } + + #[inline] + fn write_bool(&mut self, writer: &mut W, value: bool) -> io::Result<()> + where + W: ?Sized + Write, + { + let s = if value { + b"true" as &[u8] + } else { + b"false" as &[u8] + }; + writer.write_all(s) + } + + #[inline] + fn write_i8(&mut self, writer: &mut W, value: i8) -> io::Result<()> + where + W: ?Sized + Write, + { + let mut buffer = itoa::Buffer::new(); + let s = buffer.format(value); + writer.write_all(s.as_bytes()) + } + + #[inline] + fn write_i16(&mut self, writer: &mut W, value: i16) -> io::Result<()> + where + W: ?Sized + Write, + { + let mut buffer = itoa::Buffer::new(); + let s = buffer.format(value); + writer.write_all(s.as_bytes()) + } + + #[inline] + fn write_i32(&mut self, writer: &mut W, value: i32) -> io::Result<()> + where + W: ?Sized + Write, + { + let mut buffer = itoa::Buffer::new(); + let s = buffer.format(value); + writer.write_all(s.as_bytes()) + } + + #[inline] + fn write_i64(&mut self, writer: &mut W, value: i64) -> io::Result<()> + where + W: ?Sized + Write, + { + let mut buffer = itoa::Buffer::new(); + let s = buffer.format(value); + writer.write_all(s.as_bytes()) + } + + #[inline] + fn write_u8(&mut self, writer: &mut W, value: u8) -> io::Result<()> + where + W: ?Sized + Write, + { + let mut buffer = itoa::Buffer::new(); + let s = buffer.format(value); + writer.write_all(s.as_bytes()) + } + + #[inline] + fn write_u16(&mut self, writer: &mut W, value: u16) -> io::Result<()> + where + W: ?Sized + Write, + { + let mut buffer = itoa::Buffer::new(); + let s = buffer.format(value); + writer.write_all(s.as_bytes()) + } + + #[inline] + fn write_u32(&mut self, writer: &mut W, value: u32) -> io::Result<()> + where + W: ?Sized + Write, + { + let mut buffer = itoa::Buffer::new(); + let s = buffer.format(value); + writer.write_all(s.as_bytes()) + } + + #[inline] + fn write_u64(&mut self, writer: &mut W, value: u64) -> io::Result<()> + where + W: ?Sized + Write, + { + let mut buffer = itoa::Buffer::new(); + let s = buffer.format(value); + writer.write_all(s.as_bytes()) + } + + #[inline] + fn write_f32(&mut self, writer: &mut W, value: f32) -> io::Result<()> + where + W: ?Sized + Write, + { + let mut buffer = ryu::Buffer::new(); + let s = buffer.format_finite(value); + writer.write_all(s.as_bytes()) + } + + #[inline] + fn write_f64(&mut self, writer: &mut W, value: f64) -> io::Result<()> + where + W: ?Sized + Write, + { + let mut buffer = ryu::Buffer::new(); + let s = buffer.format_finite(value); + writer.write_all(s.as_bytes()) + } + + #[inline] + fn write_str(&mut self, writer: &mut W, value: &str) -> io::Result<()> + where + W: ?Sized + Write, + { + writer.write_all(value.as_bytes()) + } + + #[inline] + fn begin_key(&mut self, writer: &mut W) -> io::Result<()> + where + W: ?Sized + Write, + { + writer.write_all(b"\n") + } + + #[inline] + fn end_key(&mut self, writer: &mut W) -> io::Result<()> + where + W: ?Sized + Write, + { + writer.write_all(b"=") + } + + #[inline] + fn begin_value(&mut self, writer: &mut W) -> io::Result<()> + where + W: ?Sized + Write, + { + writer.write_all(b"") + } + + #[inline] + fn end_value(&mut self, writer: &mut W) -> io::Result<()> + where + W: ?Sized + Write, + { + writer.write_all(b"") + } +} + +impl<'a, W: Write, F: Formatter> ser::Serializer for &'a mut Serializer { + type Ok = (); + type Error = error::Error; + + type SerializeSeq = Compound<'a, W, F>; + type SerializeTuple = Compound<'a, W, F>; + type SerializeTupleStruct = Compound<'a, W, F>; + type SerializeTupleVariant = Compound<'a, W, F>; + type SerializeMap = Compound<'a, W, F>; + type SerializeStruct = Compound<'a, W, F>; + type SerializeStructVariant = Compound<'a, W, F>; + + fn serialize_bool(self, v: bool) -> Result { + self.formatter + .write_bool(&mut self.writer, v) + .map_err(ser::Error::custom) + } + + fn serialize_i8(self, v: i8) -> Result { + self.formatter + .write_i8(&mut self.writer, v) + .map_err(ser::Error::custom) + } + + fn serialize_i16(self, v: i16) -> Result { + self.formatter + .write_i16(&mut self.writer, v) + .map_err(ser::Error::custom) + } + + fn serialize_i32(self, v: i32) -> Result { + self.formatter + .write_i32(&mut self.writer, v) + .map_err(ser::Error::custom) + } + + fn serialize_i64(self, v: i64) -> Result { + self.formatter + .write_i64(&mut self.writer, v) + .map_err(ser::Error::custom) + } + + fn serialize_u8(self, v: u8) -> Result { + self.formatter + .write_u8(&mut self.writer, v) + .map_err(ser::Error::custom) + } + + fn serialize_u16(self, v: u16) -> Result { + self.formatter + .write_u16(&mut self.writer, v) + .map_err(ser::Error::custom) + } + + fn serialize_u32(self, v: u32) -> Result { + self.formatter + .write_u32(&mut self.writer, v) + .map_err(ser::Error::custom) + } + + fn serialize_u64(self, v: u64) -> Result { + self.formatter + .write_u64(&mut self.writer, v) + .map_err(ser::Error::custom) + } + + fn serialize_f32(self, v: f32) -> Result { + self.formatter + .write_f32(&mut self.writer, v) + .map_err(ser::Error::custom) + } + + fn serialize_f64(self, v: f64) -> Result { + self.formatter + .write_f64(&mut self.writer, v) + .map_err(ser::Error::custom) + } + + fn serialize_char(self, _v: char) -> Result { + Err(ser::Error::custom("unsupported char")) + } + + fn serialize_str(self, v: &str) -> Result { + self.formatter + .write_str(&mut self.writer, v) + .map_err(ser::Error::custom) + } + + fn serialize_bytes(self, _v: &[u8]) -> Result { + Err(ser::Error::custom("unsupported bytes")) + } + + fn serialize_none(self) -> Result { + self.serialize_unit() + } + + fn serialize_some(self, value: &T) -> Result + where + T: Serialize, + { + value.serialize(self) + } + + fn serialize_unit(self) -> Result { + self.formatter + .write_null(&mut self.writer) + .map_err(ser::Error::custom) + } + + fn serialize_unit_struct(self, _name: &'static str) -> Result { + self.serialize_unit() + } + + fn serialize_unit_variant( + self, + _name: &'static str, + _variant_index: u32, + variant: &'static str, + ) -> Result { + self.serialize_str(variant) + } + + fn serialize_newtype_struct( + self, + _name: &'static str, + _value: &T, + ) -> Result + where + T: Serialize, + { + Err(ser::Error::custom("unsupported newtype struct")) + } + + fn serialize_newtype_variant( + self, + _name: &'static str, + _variant_index: u32, + _variant: &'static str, + _value: &T, + ) -> Result + where + T: Serialize, + { + Err(ser::Error::custom("unsupported newtype variant")) + } + + fn serialize_seq(self, _len: Option) -> Result { + Err(ser::Error::custom("unsupported seq")) + } + + fn serialize_tuple(self, _len: usize) -> Result { + Err(ser::Error::custom("unsupported tuple")) + } + + fn serialize_tuple_struct( + self, + _name: &'static str, + _len: usize, + ) -> Result { + Err(ser::Error::custom("unsupported tuple struct")) + } + + fn serialize_tuple_variant( + self, + _name: &'static str, + _variant_index: u32, + _variant: &'static str, + _len: usize, + ) -> Result { + Err(ser::Error::custom("unsupported tuple variant")) + } + + fn serialize_map(self, _len: Option) -> Result { + Ok(Compound::Map { + ser: self, + first: true, + }) + } + + fn serialize_struct(self, _name: &'static str, len: usize) -> Result { + self.serialize_map(Some(len)) + } + + fn serialize_struct_variant( + self, + _name: &'static str, + _variant_index: u32, + _variant: &'static str, + _len: usize, + ) -> Result { + Err(ser::Error::custom("unsupported struct variant")) + } +} + +#[derive(Clone, Debug)] +pub struct CompactFormatter; + +impl Formatter for CompactFormatter {} + +pub enum Compound<'a, W: 'a, F: 'a> { + Map { + ser: &'a mut Serializer, + first: bool, + }, +} + +impl<'a, W: Write, F: Formatter> ser::SerializeSeq for Compound<'a, W, F> { + type Ok = (); + type Error = error::Error; + + fn serialize_element(&mut self, _value: &T) -> Result + where + T: ?Sized + Serialize, + { + unimplemented!() + } + + fn end(self) -> Result { + unimplemented!() + } +} + +impl<'a, W: Write, F: Formatter> ser::SerializeTuple for Compound<'a, W, F> { + type Ok = (); + type Error = error::Error; + + fn serialize_element(&mut self, _value: &T) -> Result + where + T: ?Sized + Serialize, + { + unimplemented!() + } + + fn end(self) -> Result { + unimplemented!() + } +} + +impl<'a, W: Write, F: Formatter> ser::SerializeTupleStruct for Compound<'a, W, F> { + type Ok = (); + type Error = error::Error; + + fn serialize_field(&mut self, _value: &T) -> Result + where + T: ?Sized + Serialize, + { + unimplemented!() + } + + fn end(self) -> Result { + unimplemented!() + } +} + +impl<'a, W: Write, F: Formatter> ser::SerializeTupleVariant for Compound<'a, W, F> { + type Ok = (); + type Error = error::Error; + + fn serialize_field(&mut self, _value: &T) -> Result + where + T: ?Sized + Serialize, + { + unimplemented!() + } + + fn end(self) -> Result { + unimplemented!() + } +} + +impl<'a, W: Write, F: Formatter> ser::SerializeMap for Compound<'a, W, F> { + type Ok = (); + type Error = error::Error; + + fn serialize_key(&mut self, key: &T) -> Result + where + T: ?Sized + Serialize, + { + match self { + Compound::Map { ser, first } => { + if !*first { + ser.formatter + .begin_key(&mut ser.writer) + .map_err(ser::Error::custom)?; + } else { + *first = false + } + + key.serialize(&mut **ser)?; + ser.formatter + .end_key(&mut ser.writer) + .map_err(ser::Error::custom) + } + } + } + + fn serialize_value(&mut self, value: &T) -> Result + where + T: ?Sized + Serialize, + { + match self { + Compound::Map { ser, .. } => { + ser.formatter + .begin_value(&mut ser.writer) + .map_err(ser::Error::custom)?; + + value.serialize(&mut **ser)?; + ser.formatter + .end_value(&mut ser.writer) + .map_err(ser::Error::custom) + } + } + } + + fn end(self) -> Result { + Ok(()) + } +} + +impl<'a, W: Write, F: Formatter> ser::SerializeStruct for Compound<'a, W, F> { + type Ok = (); + type Error = error::Error; + + fn serialize_field(&mut self, key: &'static str, value: &T) -> Result + where + T: ?Sized + Serialize, + { + match self { + Compound::Map { .. } => ser::SerializeMap::serialize_entry(self, key, value), + } + } + + fn end(self) -> Result { + Ok(()) + } +} + +impl<'a, W: Write, F: Formatter> ser::SerializeStructVariant for Compound<'a, W, F> { + type Ok = (); + type Error = error::Error; + + fn serialize_field(&mut self, _key: &'static str, _value: &T) -> Result + where + T: ?Sized + Serialize, + { + unimplemented!() + } + + fn end(self) -> Result { + unimplemented!() + } +} + +#[inline] +pub fn to_writer(writer: W, value: &T) -> Result<()> +where + W: Write, + T: ?Sized + Serialize, +{ + let mut ser = Serializer::new(writer); + value.serialize(&mut ser) +} + +#[inline] +pub fn to_vec(value: &T) -> Result> +where + T: ?Sized + Serialize, +{ + let mut writer = Vec::with_capacity(128); + to_writer(&mut writer, value)?; + Ok(writer) +} + +#[inline] +pub fn to_string(value: &T) -> Result +where + T: ?Sized + Serialize, +{ + let vec = to_vec(value)?; + let string = unsafe { String::from_utf8_unchecked(vec) }; + Ok(string) +} diff --git a/tests/test.rs b/tests/test.rs new file mode 100644 index 0000000..13615bd --- /dev/null +++ b/tests/test.rs @@ -0,0 +1,59 @@ +use serde::{Deserialize, Serialize}; + +#[derive(Deserialize, Serialize, Debug)] +struct Value { + #[serde(rename = "unused_0")] + unused0: String, + unused1: Option, + unused2: i32, + unused3: u32, + unused4: f32, + unused5: Enum, +} + +#[derive(Deserialize, Serialize, Debug, Eq, PartialEq)] +enum Enum { + #[serde(rename = "u0")] + U0, + #[serde(rename = "u1")] + U1, +} + +#[test] +fn from_str() { + let prop = r" + unused_0=unused 0 + unused1= + unused2=2 + unused3=3 + unused4=4.4 + unused5=u0 + unused6=_ + "; + + let v: Value = serde_prop::from_str(prop).unwrap(); + assert_eq!(v.unused0, "unused 0"); + assert_eq!(v.unused1, None); + assert_eq!(v.unused2, 2_i32); + assert_eq!(v.unused3, 3_u32); + assert_eq!(v.unused4, 4.4_f32); + assert_eq!(v.unused5, Enum::U0) +} + +#[test] +fn to_string() { + let v = Value { + unused0: "unused 0".to_owned(), + unused1: None, + unused2: 2_i32, + unused3: 3_u32, + unused4: 4.4_f32, + unused5: Enum::U0, + }; + + let s = serde_prop::to_string(&v).unwrap(); + assert_eq!( + s, + "unused_0=unused 0\nunused1=\nunused2=2\nunused3=3\nunused4=4.4\nunused5=u0" + ); +}