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use std::io;
use super::{Deserialize, Serialize, Error, VarUint32, CountedList, InitExpr, CountedListWriter};
#[derive(Debug)]
pub struct ElementSegment {
index: u32,
offset: InitExpr,
members: Vec<u32>,
}
impl ElementSegment {
pub fn new(index: u32, offset: InitExpr, members: Vec<u32>) -> Self {
ElementSegment { index: index, offset: offset, members: members }
}
pub fn members(&self) -> &[u32] { &self.members }
pub fn members_mut(&mut self) -> &mut Vec<u32> { &mut self.members }
pub fn index(&self) -> u32 { self.index }
pub fn offset(&self) -> &InitExpr { &self.offset }
pub fn offset_mut(&mut self) -> &mut InitExpr { &mut self.offset }
}
impl Deserialize for ElementSegment {
type Error = Error;
fn deserialize<R: io::Read>(reader: &mut R) -> Result<Self, Self::Error> {
let index = VarUint32::deserialize(reader)?;
let offset = InitExpr::deserialize(reader)?;
let funcs: Vec<u32> = CountedList::<VarUint32>::deserialize(reader)?
.into_inner()
.into_iter()
.map(Into::into)
.collect();
Ok(ElementSegment {
index: index.into(),
offset: offset,
members: funcs,
})
}
}
impl Serialize for ElementSegment {
type Error = Error;
fn serialize<W: io::Write>(self, writer: &mut W) -> Result<(), Self::Error> {
VarUint32::from(self.index).serialize(writer)?;
self.offset.serialize(writer)?;
let data = self.members;
let counted_list = CountedListWriter::<VarUint32, _>(
data.len(),
data.into_iter().map(Into::into),
);
counted_list.serialize(writer)?;
Ok(())
}
}
pub struct DataSegment {
index: u32,
offset: InitExpr,
value: Vec<u8>,
}
impl DataSegment {
pub fn new(index: u32, offset: InitExpr, value: Vec<u8>) -> Self {
DataSegment {
index: index,
offset: offset,
value: value,
}
}
pub fn index(&self) -> u32 { self.index }
pub fn offset(&self) -> &InitExpr { &self.offset }
pub fn offset_mut(&mut self) -> &mut InitExpr { &mut self.offset }
pub fn value(&self) -> &[u8] { &self.value }
pub fn value_mut(&mut self) -> &mut Vec<u8> { &mut self.value }
}
impl Deserialize for DataSegment {
type Error = Error;
fn deserialize<R: io::Read>(reader: &mut R) -> Result<Self, Self::Error> {
let index = VarUint32::deserialize(reader)?;
let offset = InitExpr::deserialize(reader)?;
let value_len = VarUint32::deserialize(reader)?;
let mut value_buf = vec![0u8; value_len.into()];
reader.read_exact(&mut value_buf[..])?;
Ok(DataSegment {
index: index.into(),
offset: offset,
value: value_buf,
})
}
}
impl Serialize for DataSegment {
type Error = Error;
fn serialize<W: io::Write>(self, writer: &mut W) -> Result<(), Self::Error> {
VarUint32::from(self.index).serialize(writer)?;
self.offset.serialize(writer)?;
let value = self.value;
VarUint32::from(value.len()).serialize(writer)?;
writer.write_all(&value[..])?;
Ok(())
}
}