| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| use super::cursor::AvroCursor; |
| use super::schema::WriterSchema; |
| |
| /// Trait for types that can be decoded directly from Avro binary data. |
| pub trait AvroRecordDecode: Sized { |
| fn decode(cursor: &mut AvroCursor, writer_schema: &WriterSchema) -> crate::Result<Self>; |
| } |
| |
| /// Safely negate a negative Avro block count to usize. |
| /// Avro uses negative counts to indicate that a block-size-in-bytes follows. |
| #[inline] |
| pub(crate) fn neg_count_to_usize(count: i64) -> crate::Result<usize> { |
| count |
| .checked_neg() |
| .map(|v| v as usize) |
| .ok_or_else(|| crate::Error::UnexpectedError { |
| message: format!("avro decode: block count overflow: {count}"), |
| source: None, |
| }) |
| } |
