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37 lines
719 B
Go
37 lines
719 B
Go
package rifs
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import (
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"io"
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)
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// ReadCounter proxies read requests and maintains a counter of bytes read.
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type ReadCounter struct {
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r io.Reader
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counter int
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}
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// NewReadCounter returns a new `ReadCounter` struct wrapping a `Reader`.
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func NewReadCounter(r io.Reader) *ReadCounter {
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return &ReadCounter{
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r: r,
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}
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}
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// Count returns the total number of bytes read.
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func (rc *ReadCounter) Count() int {
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return rc.counter
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}
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// Reset resets the counter to zero.
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func (rc *ReadCounter) Reset() {
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rc.counter = 0
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}
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// Read forwards a read to the underlying `Reader` while bumping the counter.
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func (rc *ReadCounter) Read(b []byte) (n int, err error) {
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n, err = rc.r.Read(b)
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rc.counter += n
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return n, err
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}
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