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path: root/core/vm/segments.go
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package vm

import "math/big"

type jumpSeg struct {
    pos uint64
    err error
    gas *big.Int
}

func (j jumpSeg) do(program *Program, pc *uint64, env Environment, contract *Contract, memory *Memory, stack *stack) ([]byte, error) {
    if !contract.UseGas(j.gas) {
        return nil, OutOfGasError
    }
    if j.err != nil {
        return nil, j.err
    }
    *pc = j.pos
    return nil, nil
}
func (s jumpSeg) halts() bool { return false }
func (s jumpSeg) Op() OpCode  { return 0 }

type pushSeg struct {
    data []*big.Int
    gas  *big.Int
}

func (s pushSeg) do(program *Program, pc *uint64, env Environment, contract *Contract, memory *Memory, stack *stack) ([]byte, error) {
    // Use the calculated gas. When insufficient gas is present, use all gas and return an
    // Out Of Gas error
    if !contract.UseGas(s.gas) {
        return nil, OutOfGasError
    }

    for _, d := range s.data {
        stack.push(new(big.Int).Set(d))
    }
    *pc += uint64(len(s.data))
    return nil, nil
}

func (s pushSeg) halts() bool { return false }
func (s pushSeg) Op() OpCode  { return 0 }