47 lines
1.0 KiB
Go
47 lines
1.0 KiB
Go
package ethchain
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import (
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"fmt"
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"github.com/ethereum/eth-go/ethutil"
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"math/big"
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)
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func Disassemble(script []byte) (asm []string) {
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pc := new(big.Int)
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for {
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if pc.Cmp(big.NewInt(int64(len(script)))) >= 0 {
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return
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}
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// Get the memory location of pc
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val := script[pc.Int64()]
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// Get the opcode (it must be an opcode!)
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op := OpCode(val)
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asm = append(asm, fmt.Sprintf("%v", op))
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switch op {
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case oPUSH1, oPUSH2, oPUSH3, oPUSH4, oPUSH5, oPUSH6, oPUSH7, oPUSH8, oPUSH9, oPUSH10, oPUSH11, oPUSH12, oPUSH13, oPUSH14, oPUSH15, oPUSH16, oPUSH17, oPUSH18, oPUSH19, oPUSH20, oPUSH21, oPUSH22, oPUSH23, oPUSH24, oPUSH25, oPUSH26, oPUSH27, oPUSH28, oPUSH29, oPUSH30, oPUSH31, oPUSH32:
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pc.Add(pc, ethutil.Big1)
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a := int64(op) - int64(oPUSH1) + 1
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data := script[pc.Int64() : pc.Int64()+a]
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val := ethutil.BigD(data)
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var b []byte
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if val.Int64() == 0 {
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b = []byte{0}
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} else {
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b = val.Bytes()
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}
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asm = append(asm, fmt.Sprintf("0x%x", b))
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pc.Add(pc, big.NewInt(a-1))
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}
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pc.Add(pc, ethutil.Big1)
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}
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return
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}
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