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Cleanup VM.

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* CALLDATA use getData
* removed old context get range value
* removed casting big => int for some cases
* pc now big int #457
This commit is contained in:
obscuren
2015-03-28 20:30:16 +01:00
parent 3b7e4173ce
commit 368ebe63a9
4 changed files with 44 additions and 55 deletions
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20
core/vm/context.go
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@ -1,7 +1,6 @@
package vm
import (
"math"
"math/big"
"github.com/ethereum/go-ethereum/common"
@ -41,29 +40,18 @@ func NewContext(caller ContextRef, object ContextRef, value, gas, price *big.Int
return c
}
func (c *Context) GetOp(n uint64) OpCode {
func (c *Context) GetOp(n *big.Int) OpCode {
return OpCode(c.GetByte(n))
}
func (c *Context) GetByte(n uint64) byte {
if n < uint64(len(c.Code)) {
return c.Code[n]
func (c *Context) GetByte(n *big.Int) byte {
if n.Cmp(big.NewInt(int64(len(c.Code)))) < 0 {
return c.Code[n.Int64()]
}
return 0
}
func (c *Context) GetBytes(x, y int) []byte {
return c.GetRangeValue(uint64(x), uint64(y))
}
func (c *Context) GetRangeValue(x, size uint64) []byte {
x = uint64(math.Min(float64(x), float64(len(c.Code))))
y := uint64(math.Min(float64(x+size), float64(len(c.Code))))
return common.RightPadBytes(c.Code[x:y], int(size))
}
func (c *Context) Return(ret []byte) []byte {
// Return the remaining gas to the caller
c.caller.ReturnGas(c.Gas, c.Price)