mirror of
https://github.com/dolthub/dolt.git
synced 2026-02-09 18:59:12 -06:00
38 lines
780 B
Go
38 lines
780 B
Go
// Copyright 2016 Attic Labs, Inc. All rights reserved.
|
|
// Licensed under the Apache License, version 2.0:
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
// Package progressreader provides an io.Reader that reports progress to a callback
|
|
package progressreader
|
|
|
|
import (
|
|
"io"
|
|
"time"
|
|
|
|
"github.com/attic-labs/noms/go/util/status"
|
|
)
|
|
|
|
type Callback func(seen uint64)
|
|
|
|
func New(inner io.Reader, cb Callback) io.Reader {
|
|
return &reader{inner, uint64(0), time.Time{}, cb}
|
|
}
|
|
|
|
type reader struct {
|
|
inner io.Reader
|
|
seen uint64
|
|
lastTime time.Time
|
|
cb Callback
|
|
}
|
|
|
|
func (r *reader) Read(p []byte) (n int, err error) {
|
|
n, err = r.inner.Read(p)
|
|
r.seen += uint64(n)
|
|
|
|
if now := time.Now(); now.Sub(r.lastTime) >= status.Rate {
|
|
r.cb(r.seen)
|
|
r.lastTime = now
|
|
}
|
|
return
|
|
}
|