MemoryUtils

Overview

License: MIT

library MemoryUtils

A library that provides utility functions for memory manipulation in Solidity.

Functions info

copy

function copy(
    bytes memory source_
) internal view returns (bytes memory destination_)

Copies the contents of the source bytes to the destination bytes. Strings can be cast to bytes in order to use this function.

Parameters:

Name	Type	Description
source_	bytes	The source bytes to copy from.

Return values:

Name	Type	Description
destination_	bytes	The newly allocated bytes.

copy

function copy(
    bytes32[] memory source_
) internal view returns (bytes32[] memory destination_)

Copies the contents of the source bytes32 array to the destination bytes32 array. uint256[], address[] array can be casted to bytes32[] via TypeCaster library.

Parameters:

Name	Type	Description
source_	bytes32[]	The source bytes32 array to copy from.

Return values:

Name	Type	Description
destination_	bytes32[]	The newly allocated bytes32 array.

unsafeCopy

function unsafeCopy(
    uint256 sourcePointer_,
    uint256 destinationPointer_,
    uint256 size_
) internal view

Copies memory from one location to another efficiently via identity precompile.

This function does not account for free memory pointer and should be used with caution.

This signature of calling identity precompile is: staticcall(gas(), address(0x04), argsOffset, argsSize, retOffset, retSize)

Parameters:

Name	Type	Description
sourcePointer_	uint256	The offset in the memory from which to copy.
destinationPointer_	uint256	The offset in the memory where the result will be copied.
size_	uint256	The size of the memory to copy.

getPointer

function getPointer(
    bytes memory data_
) internal pure returns (uint256 pointer_)

Returns the memory pointer to the given bytes starting position including the length.

getPointer

function getPointer(
    bytes32[] memory data_
) internal pure returns (uint256 pointer_)

Returns the memory pointer to the given bytes starting position including the length. Cast uint256[] and address[] to bytes32[] via TypeCaster library.

getDataPointer

function getDataPointer(
    bytes memory data_
) internal pure returns (uint256 pointer_)

Returns the memory pointer to the given bytes data starting position skipping the length.

getDataPointer

function getDataPointer(
    bytes32[] memory data_
) internal pure returns (uint256 pointer_)

Returns the memory pointer to the given bytes data starting position skipping the length. Cast uint256[] and address[] to bytes32[] via TypeCaster library.