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booleanreader.go
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/
booleanreader.go
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package orc
import "io"
type BooleanReader struct {
*RunLengthByteReader
bitsInData int
data byte
err error
val bool
}
func NewBooleanReader(r io.ByteReader) *BooleanReader {
return &BooleanReader{
RunLengthByteReader: NewRunLengthByteReader(r),
}
}
func (b *BooleanReader) Next() bool {
// read more data if necessary
if b.bitsInData == 0 {
if !b.RunLengthByteReader.Next() {
return false
}
byt := b.RunLengthByteReader.Byte()
b.data = byt
b.bitsInData = 8
}
b.val = (b.data & 0x80) != 0
// mark bit consumed
b.data <<= 1
b.bitsInData--
return true
}
func (b *BooleanReader) Bool() bool {
return b.val
}
func (b *BooleanReader) Value() interface{} {
return b.Bool()
}
func (b *BooleanReader) Err() error {
if b.err != nil {
return b.err
}
return b.RunLengthByteReader.Err()
}