change get_enc_len to get_enc_size because "size" is more appropriate term

src/fot/decoder.rs

@@ -5,7 +5,7 @@ use crate::fot::raw::Raw;
 pub trait Decoder: Sized {
     fn decode(raw: &Raw, offset: usize, size: usize) -> Result<Self>;
     fn encode(&self) -> Raw;
-    fn get_enc_len(&self) -> usize;
+    fn get_enc_size(&self) -> usize;
 }
 
 impl Decoder for String {
@@ -23,7 +23,7 @@ impl Decoder for String {
         Raw { offset: 0, size: str.len(), mem: str}
     }
 
-    fn get_enc_len(&self) -> usize {
+    fn get_enc_size(&self) -> usize {
         self.len() + 1
     }
 }

src/fot/tag.rs

@@ -16,13 +16,13 @@ impl Decoder for Tag {
     }
 
     fn encode(&self) -> Raw {
-        Raw::join(0, self.get_enc_len(), &mut [
+        Raw::join(0, self.get_enc_size(), &mut [
             self.name.encode(),
             self.version.encode()
         ])
     }
 
-    fn get_enc_len(&self) -> usize {
-        self.name.get_enc_len() + self.version.get_enc_len()
+    fn get_enc_size(&self) -> usize {
+        self.name.get_enc_size() + self.version.get_enc_size()
     }
 }

src/fot/world.rs

@@ -50,7 +50,7 @@ impl Decoder for World {
         ])
     }
 
-    fn get_enc_len(&self) -> usize {
+    fn get_enc_size(&self) -> usize {
         Self::WORLD_HDR_LEN + self.data.mem.len()
     }
 }