mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
108 lines
3.9 KiB
C++
108 lines
3.9 KiB
C++
/*
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This file is part of solidity.
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solidity 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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solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* Component that can generate various useful Yul functions.
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*/
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#pragma once
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#include <liblangutil/EVMVersion.h>
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#include <libsolidity/codegen/MultiUseYulFunctionCollector.h>
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#include <memory>
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#include <string>
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namespace dev
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{
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namespace solidity
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{
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class Type;
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class ArrayType;
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/**
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* Component that can generate various useful Yul functions.
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*/
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class YulUtilFunctions
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{
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public:
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explicit YulUtilFunctions(
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langutil::EVMVersion _evmVersion,
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std::shared_ptr<MultiUseYulFunctionCollector> _functionCollector
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):
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m_evmVersion(_evmVersion),
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m_functionCollector(std::move(_functionCollector))
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{}
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/// @returns a function that combines the address and selector to a single value
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/// for use in the ABI.
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std::string combineExternalFunctionIdFunction();
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/// @returns a function that splits the address and selector from a single value
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/// for use in the ABI.
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std::string splitExternalFunctionIdFunction();
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/// @returns a function that copies raw bytes of dynamic length from calldata
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/// or memory to memory.
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/// Pads with zeros and might write more than exactly length.
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std::string copyToMemoryFunction(bool _fromCalldata);
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/// @returns the name of a function that takes a (cleaned) value of the given value type and
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/// left-aligns it, usually for use in non-padded encoding.
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std::string leftAlignFunction(Type const& _type);
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std::string shiftLeftFunction(size_t _numBits);
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std::string shiftRightFunction(size_t _numBits);
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/// @returns the name of a function that rounds its input to the next multiple
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/// of 32 or the input if it is a multiple of 32.
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std::string roundUpFunction();
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std::string arrayLengthFunction(ArrayType const& _type);
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/// @returns the name of a function that computes the number of bytes required
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/// to store an array in memory given its length (internally encoded, not ABI encoded).
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/// The function reverts for too large lengths.
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std::string arrayAllocationSizeFunction(ArrayType const& _type);
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/// @returns the name of a function that converts a storage slot number
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/// or a memory pointer to the slot number / memory pointer for the data position of an array
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/// which is stored in that slot / memory area.
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std::string arrayDataAreaFunction(ArrayType const& _type);
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/// @returns the name of a function that advances an array data pointer to the next element.
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/// Only works for memory arrays and storage arrays that store one item per slot.
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std::string nextArrayElementFunction(ArrayType const& _type);
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/// @returns the name of a function that allocates memory.
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/// Modifies the "free memory pointer"
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/// Arguments: size
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/// Return value: pointer
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std::string allocationFunction();
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/// @returns a string containing a comma-separated list of variable names consisting of @a _baseName suffixed
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/// with increasing integers in the range [@a _startSuffix, @a _endSuffix), if @a _startSuffix < @a _endSuffix,
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/// and with decreasing integers in the range [@a _endSuffix, @a _startSuffix), if @a _endSuffix < @a _startSuffix.
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/// If @a _startSuffix == @a _endSuffix, the empty string is returned.
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static std::string suffixedVariableNameList(std::string const& _baseName, size_t _startSuffix, size_t _endSuffix);
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private:
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langutil::EVMVersion m_evmVersion;
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std::shared_ptr<MultiUseYulFunctionCollector> m_functionCollector;
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};
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}
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}
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