40 releases (20 stable)
2.5.0 | Mar 2, 2024 |
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2.4.4 | Apr 29, 2023 |
2.4.3 | Mar 4, 2023 |
2.3.2 | Aug 17, 2022 |
0.6.0 | Jul 15, 2020 |
#111 in Encoding
948 downloads per month
Used in 23 crates
(20 directly)
300KB
8K
SLoC
fastnbt crate
Documentation: docs.rs
Fast serde deserializer and serializer for Minecraft: Java Edition's NBT format.
Zero-copy is supported where possible through from_bytes
. The
borrow
module contains more types for avoiding allocations.
Includes a Value
type for serializing or deserializing any NBT. Value
correctly preserves the exact NBT structure. The nbt!
macro allows easy
creation of these values.
To support NBT's arrays, there are dedicated ByteArray
, IntArray
and
LongArray
types.
See the documentation for more information.
[dependencies]
fastnbt = "2"
fastnbt
follows Semver, some things that this project does not count as a
breaking change are:
- Minimum Rust version change. Outside of corporate environments this should not be too difficult, and I don't see much need for NBT in those environments.
- Improving the (de)serializer such that valid NBT that did not (de)serialize, then (de)serializes. Any of these cases I consider a bug.
- Data format when serializing types from fastnbt/fastanvil to other formats.
Types in fastnbt implement
serde::Serialize
to enable spitting out to other data formats, but may change structure in future.
Changes that make fastnbt
incompatible with WebAssembly are considered
breaking changes.
Other NBT crates
There appears to be a few crates that support serde (de)serialization, the main ones I found were:
There are likely others! There are definitely more without serde support.
-
All these crates support serialization and deserialization with serde.
-
They are not interoperable with each other due to requiring custom handling of NBT Array types.
-
They all handle Minecraft's (actually Java's) specialized Unicode.
-
quartz and fastnbt support borrowing from the underlying bytes being deserialized.
-
fastnbt's
Value
type can round-trip deserialize-serialize NBT arrays. The other crates have value types as well, they may also round-trip correctly.Honestly, they all seem like good options!
Dependencies
~0.5–1.1MB
~25K SLoC