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use std::io;
use super::{
Deserialize, Error, ValueType, VarUint32, CountedList, Opcodes,
Serialize, CountedWriter, CountedListWriter,
};
pub struct Func(u32);
impl Func {
pub fn new(type_ref: u32) -> Self { Func(type_ref) }
pub fn type_ref(&self) -> u32 {
self.0
}
pub fn type_ref_mut(&mut self) -> &mut u32 {
&mut self.0
}
}
#[derive(Debug)]
pub struct Local {
count: u32,
value_type: ValueType,
}
impl Local {
pub fn new(count: u32, value_type: ValueType) -> Self {
Local { count: count, value_type: value_type }
}
pub fn count(&self) -> u32 { self.count }
pub fn value_type(&self) -> ValueType { self.value_type }
}
impl Deserialize for Local {
type Error = Error;
fn deserialize<R: io::Read>(reader: &mut R) -> Result<Self, Self::Error> {
let count = VarUint32::deserialize(reader)?;
let value_type = ValueType::deserialize(reader)?;
Ok(Local { count: count.into(), value_type: value_type })
}
}
impl Serialize for Local {
type Error = Error;
fn serialize<W: io::Write>(self, writer: &mut W) -> Result<(), Self::Error> {
VarUint32::from(self.count).serialize(writer)?;
self.value_type.serialize(writer)?;
Ok(())
}
}
#[derive(Debug)]
pub struct FuncBody {
locals: Vec<Local>,
opcodes: Opcodes,
}
impl FuncBody {
pub fn new(locals: Vec<Local>, opcodes: Opcodes) -> Self {
FuncBody { locals: locals, opcodes: opcodes }
}
pub fn empty() -> Self {
FuncBody { locals: Vec::new(), opcodes: Opcodes::empty() }
}
pub fn locals(&self) -> &[Local] { &self.locals }
pub fn code(&self) -> &Opcodes { &self.opcodes }
pub fn locals_mut(&mut self) -> &mut Vec<Local> { &mut self.locals }
pub fn code_mut(&mut self) -> &mut Opcodes { &mut self.opcodes }
}
impl Deserialize for FuncBody {
type Error = Error;
fn deserialize<R: io::Read>(reader: &mut R) -> Result<Self, Self::Error> {
let _body_size = VarUint32::deserialize(reader)?;
let locals: Vec<Local> = CountedList::deserialize(reader)?.into_inner();
let opcodes = Opcodes::deserialize(reader)?;
Ok(FuncBody { locals: locals, opcodes: opcodes })
}
}
impl Serialize for FuncBody {
type Error = Error;
fn serialize<W: io::Write>(self, writer: &mut W) -> Result<(), Self::Error> {
let mut counted_writer = CountedWriter::new(writer);
let data = self.locals;
let counted_list = CountedListWriter::<Local, _>(
data.len(),
data.into_iter().map(Into::into),
);
counted_list.serialize(&mut counted_writer)?;
let code = self.opcodes;
code.serialize(&mut counted_writer)?;
counted_writer.done()?;
Ok(())
}
}