Crate fast_rsync

A faster implementation of librsync in pure Rust.

This crate offers three major APIs:

1. Signature::calculate(), which takes a block of data and returns a “signature” of that data which is much smaller than the original data.
2. diff(), which takes a signature for some block A, and a block of data B, and returns a delta between block A and block B. If A and B are “similar”, then the delta is usually much smaller than block B.
3. apply(), which takes a block A and a delta (as constructed by diff()), and (usually) returns the block B.

Structs

• IndexedSignature
  A signature with a block index, suitable for calculating deltas.
• Signature
  An rsync signature.
• SignatureOptions
  Options for Signature::calculate.
• SignatureParseError
  Indicates that a signature was not valid.

Enums

• ApplyError
  Indicates that a delta could not be applied because it was invalid.
• DiffError
  Indicates that a delta could not be calculated

Functions

• apply
  Apply delta to the base data base, appending the result to out.
• apply_limited
  Apply delta to the base data base, writing the result to out. Errors if more than limit bytes would be written to out.
• diff
  Calculate a delta and write it to out. This delta can be applied to the base data represented by signature to attempt to reconstruct data.