21 lines
447 B
Go
21 lines
447 B
Go
package bytecounter
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import "io"
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// ByteCounter is an io.Writer that counts bytes written to it
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type ByteCounter struct {
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N int64
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w io.Writer
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}
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// New returns a new ByteCounter
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func New(w io.Writer) *ByteCounter {
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return &ByteCounter{w: w}
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}
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// Write writes to the underlying io.Writer and counts total written bytes
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func (b *ByteCounter) Write(data []byte) (n int, err error) {
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defer func() { b.N += int64(n) }()
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return b.w.Write(data)
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}
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