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package common
import (
"math/big"
"github.com/dexon-foundation/decimal"
"github.com/dexon-foundation/dexon/common"
"github.com/dexon-foundation/dexon/core/vm/sqlvm/ast"
"github.com/dexon-foundation/dexon/core/vm/sqlvm/schema"
)
// TODO(yenlin): Do we really need to use ast encode/decode here?
func uint64ToBytes(id uint64) []byte {
bigIntID := new(big.Int).SetUint64(id)
decimalID := decimal.NewFromBigInt(bigIntID, 0)
dt := ast.ComposeDataType(ast.DataTypeMajorUint, 7)
byteID, _ := ast.DecimalEncode(dt, decimalID)
return byteID
}
func bytesToUint64(b []byte) uint64 {
dt := ast.ComposeDataType(ast.DataTypeMajorUint, 7)
d, _ := ast.DecimalDecode(dt, b)
// TODO(yenlin): Not yet a convenient way to extract uint64 from decimal...
bigInt := d.Rescale(0).Coefficient()
return bigInt.Uint64()
}
func uint8ToBytes(i uint8) []byte {
return []byte{i}
}
func tableRefToBytes(t schema.TableRef) []byte {
return uint8ToBytes(uint8(t))
}
func columnRefToBytes(c schema.ColumnRef) []byte {
return uint8ToBytes(uint8(c))
}
func indexRefToBytes(i schema.IndexRef) []byte {
return uint8ToBytes(uint8(i))
}
func hashToAddress(hash common.Hash) common.Address {
return common.BytesToAddress(hash.Bytes())
}
func addressToHash(addr common.Address) common.Hash {
return common.BytesToHash(addr.Bytes())
}
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