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Use the iterator design for bytes based API as well

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Kovid Goyal
2023-07-04 22:33:14 +05:30
parent e7d02b79d7
commit 83d97c515c
2 changed files with 26 additions and 10 deletions
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24
tools/rsync/api.go
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@@ -187,18 +187,26 @@ func (self *Patcher) CreateSignature(src io.Reader, callback func([]byte) error)
})
}
type DeltaIterator = func() ([]byte, error)
// Create a serialized delta based on the previously loaded signature
func (self *Differ) CreateDelta(src io.Reader, output_callback func([]byte) error) (err error) {
if err = self.finish_signature_data(); err != nil {
return
func (self *Differ) CreateDelta(src io.Reader) DeltaIterator {
if err := self.finish_signature_data(); err != nil {
return func() ([]byte, error) { return nil, err }
}
if self.signature == nil {
return fmt.Errorf("Cannot call CreateDelta() before loading a signature")
return func() ([]byte, error) { return nil, fmt.Errorf("Cannot call CreateDelta() before loading a signature") }
}
it := self.rsync.CreateDiff(src, self.signature)
return func() ([]byte, error) {
for {
op, err := it()
if op == nil {
return nil, err
}
return op.Serialize(), nil
}
}
self.rsync.CreateDelta(src, self.signature, func(op Operation) error {
return output_callback(op.Serialize())
})
return
}
// Add more external signature data