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Right pad bytes to prevent future programmers making bugs

This commit is contained in:
obscuren 2015-03-20 20:37:56 +01:00
parent f4e9638867
commit abce6804a0
1 changed files with 18 additions and 14 deletions
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10
vm/memory.go
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@ -1,6 +1,10 @@
package vm package vm
import "fmt" import (
"fmt"
"github.com/ethereum/go-ethereum/common"
)
type Memory struct { type Memory struct {
store []byte store []byte
@ -11,7 +15,8 @@ func NewMemory() *Memory {
} }
func (m *Memory) Set(offset, size uint64, value []byte) { func (m *Memory) Set(offset, size uint64, value []byte) {
if len(value) > 0 { value = common.RightPadBytes(value, int(size))
totSize := offset + size totSize := offset + size
lenSize := uint64(len(m.store) - 1) lenSize := uint64(len(m.store) - 1)
if totSize > lenSize { if totSize > lenSize {
@ -26,7 +31,6 @@ func (m *Memory) Set(offset, size uint64, value []byte) {
} }
copy(m.store[offset:offset+size], value) copy(m.store[offset:offset+size], value)
} }
}
func (m *Memory) Resize(size uint64) { func (m *Memory) Resize(size uint64) {
if uint64(m.Len()) < size { if uint64(m.Len()) < size {