Right pad bytes to prevent future programmers making bugs
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parent
f4e9638867
commit
abce6804a0
32
vm/memory.go
32
vm/memory.go
@ -1,6 +1,10 @@
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package vm
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import "fmt"
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import (
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"fmt"
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"github.com/ethereum/go-ethereum/common"
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)
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type Memory struct {
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store []byte
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@ -11,21 +15,21 @@ func NewMemory() *Memory {
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}
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func (m *Memory) Set(offset, size uint64, value []byte) {
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if len(value) > 0 {
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totSize := offset + size
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lenSize := uint64(len(m.store) - 1)
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if totSize > lenSize {
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// Calculate the diff between the sizes
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diff := totSize - lenSize
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if diff > 0 {
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// Create a new empty slice and append it
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newSlice := make([]byte, diff-1)
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// Resize slice
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m.store = append(m.store, newSlice...)
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}
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value = common.RightPadBytes(value, int(size))
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totSize := offset + size
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lenSize := uint64(len(m.store) - 1)
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if totSize > lenSize {
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// Calculate the diff between the sizes
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diff := totSize - lenSize
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if diff > 0 {
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// Create a new empty slice and append it
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newSlice := make([]byte, diff-1)
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// Resize slice
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m.store = append(m.store, newSlice...)
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}
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copy(m.store[offset:offset+size], value)
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}
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copy(m.store[offset:offset+size], value)
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}
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func (m *Memory) Resize(size uint64) {
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