move func to mod

src/elements/func.rs

@@ -0,0 +1,45 @@
+use std::io;
+use super::{Deserialize, Error, ValueType, VarUint32, CountedList, Opcodes};
+
+
+pub struct Local {
+    count: u32,
+    value_type: ValueType,
+}
+
+impl Local {
+    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 })
+    }   
+}
+
+pub struct FuncBody {
+    locals: Vec<Local>,
+    opcodes: Opcodes,
+}
+
+impl FuncBody {
+    pub fn locals(&self) -> &[Local] { &self.locals }
+    pub fn code(&self) -> &Opcodes { &self.opcodes }
+}
+
+impl Deserialize for FuncBody {
+     type Error = Error;
+
+    fn deserialize<R: io::Read>(reader: &mut R) -> Result<Self, Self::Error> {
+        // todo: maybe use reader.take(section_length)
+        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 })
+    }   
+}