jorgecarleitao commented on issue #1059:
URL: https://github.com/apache/arrow-rs/issues/1059#issuecomment-997150785


   I think that this may be achieved with the current code with a generic 
struct over `R: Read` that wraps a `reader: R` that
   
   1. implements `Read` and buffers the result.
   2. implements `Seek` to positions smaller than the buffer (and panics 
otherwise)
   3. when the read happens over the buffered result, it reads first from the 
buffer up to the length of the buffered result, and then from the inner reader
   
   


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