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54 lines
891 B
54 lines
891 B
package vm
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import (
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"encoding/binary"
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)
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var (
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Zero = Word{0}
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One = Word{1}
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)
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type Word [32]byte
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func (w Word) Copy() Word { return w }
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func (w Word) Bytes() []byte { return w[:] } // copied.
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func (w Word) IsZero() bool {
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accum := byte(0)
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for _, byt := range w {
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accum |= byt
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}
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return accum == 0
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}
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func Uint64ToWord(i uint64) Word {
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word := Word{}
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PutUint64(word[:], i)
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return word
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}
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func BytesToWord(bz []byte) Word {
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word := Word{}
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copy(word[:], bz)
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return word
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}
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func LeftPadWord(bz []byte) (word Word) {
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copy(word[:], bz)
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return
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}
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func RightPadWord(bz []byte) (word Word) {
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copy(word[32-len(bz):], bz)
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return
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}
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//-----------------------------------------------------------------------------
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func GetUint64(word Word) uint64 {
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return binary.LittleEndian.Uint64(word[:])
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}
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func PutUint64(dest []byte, i uint64) {
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binary.LittleEndian.PutUint64(dest, i)
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}
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