forked from quic-go/quic-go
68 lines
1.5 KiB
Go
68 lines
1.5 KiB
Go
package quic
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import (
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"bytes"
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"io"
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)
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func readUintN(b io.ByteReader, length uint8) (uint64, error) {
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var res uint64
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for i := uint8(0); i < length; i++ {
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bt, err := b.ReadByte()
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if err != nil {
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return 0, err
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}
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res = res<<8 + uint64(bt)
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}
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return res, nil
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}
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func readUint32(b io.ByteReader) (uint32, error) {
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var b1, b2, b3, b4 uint8
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var err error
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if b1, err = b.ReadByte(); err != nil {
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return 0, err
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}
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if b2, err = b.ReadByte(); err != nil {
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return 0, err
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}
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if b3, err = b.ReadByte(); err != nil {
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return 0, err
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}
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if b4, err = b.ReadByte(); err != nil {
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return 0, err
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}
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return uint32(b1) + uint32(b2)<<8 + uint32(b3)<<16 + uint32(b4)<<24, nil
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}
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func readUint16(b io.ByteReader) (uint16, error) {
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var b1, b2 uint8
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var err error
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if b1, err = b.ReadByte(); err != nil {
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return 0, err
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}
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if b2, err = b.ReadByte(); err != nil {
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return 0, err
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}
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return uint16(b1) + uint16(b2)<<8, nil
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}
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func writeUint32(b *bytes.Buffer, i uint32) {
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b.WriteByte(uint8(i & 0xff))
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b.WriteByte(uint8((i >> 8) & 0xff))
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b.WriteByte(uint8((i >> 16) & 0xff))
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b.WriteByte(uint8((i >> 24) & 0xff))
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}
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func writeUint16(b *bytes.Buffer, i uint16) {
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b.WriteByte(uint8(i & 0xff))
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b.WriteByte(uint8((i >> 8) & 0xff))
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}
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// Uint32Slice attaches the methods of sort.Interface to []uint32, sorting in increasing order.
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type Uint32Slice []uint32
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func (s Uint32Slice) Len() int { return len(s) }
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func (s Uint32Slice) Less(i, j int) bool { return s[i] < s[j] }
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func (s Uint32Slice) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
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