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65 lines
1.9 KiB
65 lines
1.9 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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cpp-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <memory>
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#include <libdevcore/Exceptions.h>
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#include "ExtVMFace.h"
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namespace dev
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{
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namespace eth
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{
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struct VMException: virtual Exception {};
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#define ETH_SIMPLE_EXCEPTION_VM(X) struct X: virtual VMException { const char* what() const noexcept override { return #X; } }
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ETH_SIMPLE_EXCEPTION_VM(BreakPointHit);
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ETH_SIMPLE_EXCEPTION_VM(BadInstruction);
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ETH_SIMPLE_EXCEPTION_VM(BadJumpDestination);
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ETH_SIMPLE_EXCEPTION_VM(OutOfGas);
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ETH_SIMPLE_EXCEPTION_VM(OutOfStack);
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ETH_SIMPLE_EXCEPTION_VM(StackUnderflow);
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/// EVM Virtual Machine interface
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class VMFace
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{
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public:
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VMFace() = default;
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virtual ~VMFace() = default;
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VMFace(VMFace const&) = delete;
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VMFace& operator=(VMFace const&) = delete;
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/// Execute EVM code by VM.
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///
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/// @param _out Expected output
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void exec(u256& io_gas, ExtVMFace& _ext, bytesRef _out, OnOpFunc const& _onOp = {})
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{
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execImpl(io_gas, _ext, _onOp).copyTo(_out);
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}
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/// The same as above but returns a copy of full output.
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bytes exec(u256& io_gas, ExtVMFace& _ext, OnOpFunc const& _onOp = {})
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{
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return execImpl(io_gas, _ext, _onOp).toVector();
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}
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/// VM implementation
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virtual bytesConstRef execImpl(u256& io_gas, ExtVMFace& _ext, OnOpFunc const& _onOp) = 0;
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};
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}
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}
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