IO Failed to Fill buffer error

[ntlively]

Because you use the same stream for reading and writing, the cursor is moved to the end of the file and any reading will attempt to read there, which will of course fail. You can observe that if you'll print file.stream_position().

You need to rewind() before reading.

Maybe related to most recent update. Only affects 1/3 sav files, other work good

[trumank]

How are you running the tool? I'm not seeing which entry point is re-using a stream.

[ntlively]

2/3 sav files work. the third is different somehow, not sure how. I'm just doing the basic uesave edit ./SaveProfile.susres.sav SaveProfile.susres.sav.md

[trumank]

That save has a MapProperty with 12 byte keys, unlike all other saves I've seen which have 16 bytes (as they are GUIDs). I don't think is any context for the parser to know how many bytes keys are supposed to have so this would require a type hinting system to fix more generally. As a hack to get this save to parse you could do the following:

diff --git a/src/lib.rs b/src/lib.rs
index f3c5faf..6d5a82a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -208,7 +208,7 @@ type UInt32 = u32;
 type Float = f32;
 type Bool = bool;
 type Enum = String;
-type StructKey = uuid::Uuid;
+type StructKey = [u8; 12];

 #[derive(Debug, PartialEq, Serialize, Deserialize)]
 pub struct MapEntry {
@@ -603,14 +603,16 @@ impl ValueKey {
             if id.is_some() {
                 ValueKey::Struct(read_properties_until_none(reader)?)
             } else {
-                ValueKey::StructKey(uuid::Uuid::read(reader)?)
+                let mut id = [0; 12];
+                reader.read_exact(&mut id)?;
+                ValueKey::StructKey(id)
             }
         })
     }
     fn write<W: Write>(&self, writer: &mut W) -> TResult<()> {
         match self {
             ValueKey::Base(v) => v.write(writer)?,
-            ValueKey::StructKey(v) => v.write(writer)?,
+            ValueKey::StructKey(v) => writer.write_all(v)?,
             ValueKey::Struct(v) => write_properties_none_terminated(writer, v)?,
         }
         Ok(())

[ntlively]

Thanks for the information. Not sure why its different, but it is

[trumank]

7c2570f adds type specifications which can be used to parse this save file:

uesave to-json -i SaveProfile.susres.sav.md -t ".SuspendAndResumeData.LevelGenMapData.DoorSpecialCaseSuspendSerializations.Key=Vector"

Note: I don't actually know it's a vector. It's possible it could be another 12 byte struct, but would require some deeper investigation.