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28 lines
549 B
Go
28 lines
549 B
Go
package bitio
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import (
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"io"
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)
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// LimitReader is a bitio.Reader that reads a limited amount of bits from a bitio.Reader.
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// Similar to bytes.LimitedReader.
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type LimitReader struct {
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r Reader
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n int64
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}
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// NewLimitReader returns a new bitio.LimitReader.
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func NewLimitReader(r Reader, n int64) *LimitReader { return &LimitReader{r, n} }
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func (l *LimitReader) ReadBits(p []byte, nBits int64) (n int64, err error) {
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if l.n <= 0 {
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return 0, io.EOF
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}
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if nBits > l.n {
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nBits = l.n
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}
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n, err = l.r.ReadBits(p, nBits)
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l.n -= n
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return n, err
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}
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