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rowid.go
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rowid.go
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package go_ora
import (
"github.com/sijms/go-ora/network"
)
type rowid struct {
rba int64
partitionID int64
blockNumber int64
slotNumber int64
}
func newRowID(session *network.Session) (*rowid, error) {
temp, err := session.GetByte()
if err != nil {
return nil, err
}
if temp > 0 {
ret := new(rowid)
ret.rba, err = session.GetInt64(4, true, true)
if err != nil {
return nil, err
}
ret.partitionID, err = session.GetInt64(2, true, true)
if err != nil {
return nil, err
}
num, err := session.GetByte()
if err != nil {
return nil, err
}
ret.blockNumber, err = session.GetInt64(4, true, true)
if err != nil {
return nil, err
}
ret.slotNumber, err = session.GetInt64(2, true, true)
if err != nil {
return nil, err
}
if ret.rba == 0 && ret.partitionID == 0 && num == 0 && ret.blockNumber == 0 && ret.slotNumber == 0 {
return nil, nil
}
return ret, nil
}
return nil, nil
}
func convertRowIDToByte(number int64, size int) []byte {
var buffer = []byte{
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89, 90, 97, 98, 99, 100, 101, 102,
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111, 112, 113, 114, 115, 116, 117, 118,
119, 120, 121, 122, 48, 49, 50, 51,
52, 53, 54, 55, 56, 57, 43, 47,
}
output := make([]byte, size)
for x := size; x > 0; x-- {
output[x-1] = buffer[number&0x3F]
if number >= 0 {
number = number >> 6
} else {
number = (number >> 6) + (2 << (32 + ^6))
}
}
return output
}
func (id *rowid) getBytes() []byte {
output := make([]byte, 0, 18)
output = append(output, convertRowIDToByte(id.rba, 6)...)
output = append(output, convertRowIDToByte(id.partitionID, 3)...)
output = append(output, convertRowIDToByte(id.blockNumber, 6)...)
output = append(output, convertRowIDToByte(id.slotNumber, 3)...)
return output
}
//// internal static long URShift(long number, int bits) => number >= 0L ? number >> bits : (number >> bits) + (2L << ~bits);