gotosocial/vendor/github.com/dsoprea/go-utility/v2/filesystem/write_counter.go
2022-01-23 14:41:31 +01:00

37 lines
737 B
Go

package rifs
import (
"io"
)
// WriteCounter proxies write requests and maintains a counter of bytes written.
type WriteCounter struct {
w io.Writer
counter int
}
// NewWriteCounter returns a new `WriteCounter` struct wrapping a `Writer`.
func NewWriteCounter(w io.Writer) *WriteCounter {
return &WriteCounter{
w: w,
}
}
// Count returns the total number of bytes read.
func (wc *WriteCounter) Count() int {
return wc.counter
}
// Reset resets the counter to zero.
func (wc *WriteCounter) Reset() {
wc.counter = 0
}
// Write forwards a write to the underlying `Writer` while bumping the counter.
func (wc *WriteCounter) Write(b []byte) (n int, err error) {
n, err = wc.w.Write(b)
wc.counter += n
return n, err
}