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20 lines
576 B
20 lines
576 B
package vm
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import "gopkg.in/fatih/set.v0"
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func analyseJumpDests(code []byte) (dests *set.Set) {
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dests = set.New()
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for pc := uint64(0); pc < uint64(len(code)); pc++ {
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var op OpCode = OpCode(code[pc])
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switch op {
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case PUSH1, PUSH2, PUSH3, PUSH4, PUSH5, PUSH6, PUSH7, PUSH8, PUSH9, PUSH10, PUSH11, PUSH12, PUSH13, PUSH14, PUSH15, PUSH16, PUSH17, PUSH18, PUSH19, PUSH20, PUSH21, PUSH22, PUSH23, PUSH24, PUSH25, PUSH26, PUSH27, PUSH28, PUSH29, PUSH30, PUSH31, PUSH32:
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a := uint64(op) - uint64(PUSH1) + 1
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pc += a
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case JUMPDEST:
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dests.Add(pc)
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}
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}
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return
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}
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