mirror of
https://github.com/wader/fq.git
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164 lines
4.0 KiB
Go
164 lines
4.0 KiB
Go
package bitio_test
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import (
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"bytes"
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"io"
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"log"
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"testing"
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"github.com/wader/fq/pkg/bitio"
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)
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type shortBitReader struct {
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bitio.BitReaderAt
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}
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func (b shortBitReader) ReadBitsAt(p []byte, nBits int, bitOff int64) (n int, err error) {
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if nBits > 3 {
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nBits = 3
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}
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return b.BitReaderAt.ReadBitsAt(p, nBits, bitOff)
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}
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func TestReader(t *testing.T) {
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bb, bbBits := bitio.BytesFromBitString("011011110")
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br := bitio.NewReaderFromReadSeeker(bytes.NewReader(bb))
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sbr := bitio.NewSectionBitReader(br, 0, int64(bbBits))
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sbr2 := bitio.NewSectionBitReader(sbr, 0, 4)
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ob := make([]byte, 2)
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obBits, _ := sbr2.ReadBits(ob, 4)
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obs := bitio.BitStringFromBytes(ob, obBits)
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log.Printf("obs: %#+v\n", obs)
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}
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func TestIOCopy(t *testing.T) {
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br := bitio.NewReaderFromReadSeeker(bytes.NewReader([]byte{0xf0, 0xff, 0xff}))
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sbr := bitio.NewSectionBitReader(br, 0, 8*3-1)
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b := &bytes.Buffer{}
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n, err := io.Copy(b, sbr)
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log.Printf("n: %d err: %v b=%v\n", n, err, b.Bytes())
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}
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func TestReadFull(t *testing.T) {
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bb, bbBits := bitio.BytesFromBitString("011011110")
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br := bitio.NewReaderFromReadSeeker(bytes.NewReader(bb))
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ob := make([]byte, 2)
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obBits, _ := bitio.ReadAtFull(shortBitReader{br}, ob, bbBits, 0)
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obs := bitio.BitStringFromBytes(ob, obBits)
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log.Printf("obs: %#+v\n", obs)
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}
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func TestMultiBitReader(t *testing.T) {
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bb1, bb1Bits := bitio.BytesFromBitString("101")
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br1 := bitio.NewSectionBitReader(bitio.NewReaderFromReadSeeker(bytes.NewReader(bb1)), 0, int64(bb1Bits))
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bb2, bb2Bits := bitio.BytesFromBitString("0001")
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br2 := bitio.NewSectionBitReader(bitio.NewReaderFromReadSeeker(bytes.NewReader(bb2)), 0, int64(bb2Bits))
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mb, _ := bitio.NewMultiBitReader([]bitio.BitReadAtSeeker{br1, br2})
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ob := make([]byte, 2)
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obBits, _ := bitio.ReadAtFull(mb, ob, 7, 0)
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obs := bitio.BitStringFromBytes(ob, obBits)
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log.Printf("obs: %#+v\n", obs)
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}
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func TestMultiBitReader11(t *testing.T) {
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bb1, bb1Bits := bitio.BytesFromBitString("11111111")
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br1 := bitio.NewSectionBitReader(bitio.NewReaderFromReadSeeker(bytes.NewReader(bb1)), 0, int64(bb1Bits))
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bb2, bb2Bits := bitio.BytesFromBitString("11111111")
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br2 := bitio.NewSectionBitReader(bitio.NewReaderFromReadSeeker(bytes.NewReader(bb2)), 0, int64(bb2Bits))
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mb, _ := bitio.NewMultiBitReader([]bitio.BitReadAtSeeker{br1, br2})
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ob := make([]byte, 2)
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obBits, _ := bitio.ReadAtFull(mb, ob, 11, 0)
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obs := bitio.BitStringFromBytes(ob, obBits)
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log.Printf("obs: %#+v\n", obs)
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}
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type testBW struct{}
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func (testBW) WriteBits(p []byte, nBits int) (n int, err error) {
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log.Printf("WriteBits p: %#+v nBits=%d\n", len(p), nBits)
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for i := 0; i < nBits; i++ {
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if bitio.Read64(p, i, 1) != 0 {
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log.Print("1")
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} else {
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log.Print("0")
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}
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log.Println()
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}
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return nBits, nil
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}
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func TestCopy(t *testing.T) {
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bb1, bb1Bits := bitio.BytesFromBitString("101")
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br1 := bitio.NewSectionBitReader(bitio.NewReaderFromReadSeeker(bytes.NewReader(bb1)), 0, int64(bb1Bits))
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bb2, bb2Bits := bitio.BytesFromBitString("0001")
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br2 := bitio.NewSectionBitReader(bitio.NewReaderFromReadSeeker(bytes.NewReader(bb2)), 0, int64(bb2Bits))
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mb, _ := bitio.NewMultiBitReader([]bitio.BitReadAtSeeker{br1, br2})
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n, err := bitio.Copy(testBW{}, mb)
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log.Printf("n: %#+v\n", n)
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log.Printf("err: %#+v\n", err)
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}
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func TestAlignBitWriter(t *testing.T) {
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bb1, bb1Bits := bitio.BytesFromBitString("101")
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br1 := bitio.NewSectionBitReader(bitio.NewReaderFromReadSeeker(bytes.NewReader(bb1)), 0, int64(bb1Bits))
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bb2, bb2Bits := bitio.BytesFromBitString("0001")
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br2 := bitio.NewSectionBitReader(bitio.NewReaderFromReadSeeker(bytes.NewReader(bb2)), 0, int64(bb2Bits))
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mb, _ := bitio.NewMultiBitReader([]bitio.BitReadAtSeeker{br1, br2})
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mbEnd, _ := bitio.EndPos(mb)
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alignN := int64(8)
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b := make([]byte, alignN/8+1)
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bLeft := (alignN - mbEnd%alignN) % alignN
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log.Printf("bLeft: %#+v\n", bLeft)
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mb, _ = bitio.NewMultiBitReader([]bitio.BitReadAtSeeker{mb, bitio.NewBufferFromBytes(b, bLeft)})
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bw := testBW{}
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// ab := &bitio.AlignBitWriter{N: 8, W: bw}
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n, err := bitio.Copy(bw, mb)
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// ab.Close()
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log.Printf("n: %#+v\n", n)
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log.Printf("err: %#+v\n", err)
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}
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