OpcodeHelpers

Opcode helper functions that are used in other opcode libraries

Opcode libraries are: ComparisonOpcodes, BranchingOpcodes, LogicalOpcodes, and OtherOpcodes

putToStack

function putToStack(address _ctxProgram, uint256 _value) public

getNextBytes

function getNextBytes(address _ctxProgram, uint256 _size) public returns (bytes out)

Gets next {size} bytes from the program

Parameters

Name	Type	Description
_ctxProgram	address	Context contract address
_size	uint256	Size of the chunk

Return Values

Name	Type	Description
out	bytes	Resulting chunk of type bytes

getNextBytes32

function getNextBytes32(address _ctxProgram, uint256 _size) public returns (bytes32 result)

Get next parameter from the program that is executing now

Parameters

Name	Type	Description
_ctxProgram	address	ProgramContext contract address
_size	uint256	Size of the chunk

Return Values

Name	Type	Description
result	bytes32	The bytes32-sized slice of the program

addItemToArray

function addItemToArray(address _ctxProgram, bytes32 _varValue, bytes32 _arrNameB32) public

add value in bytes32 to array

Parameters

Name	Type	Description
_ctxProgram	address	Context contract address
_varValue	bytes32	added value
_arrNameB32	bytes32	name of array

readBytesSlice

function readBytesSlice(address _ctxProgram, uint256 _start, uint256 _end) public view returns (bytes32 result)

Reads the slice of bytes from the raw program Warning! The maximum slice size can only be 32 bytes!

Parameters

Name	Type	Description
_ctxProgram	address	Context contract address
_start	uint256	Start position to read
_end	uint256	End position to read

Return Values

Name	Type	Description
result	bytes32	Bytes32 slice of the raw program

nextBranchSelector

function nextBranchSelector(address _ctxDSL, address _ctxProgram, string baseOpName) public returns (bytes4 result)

mustCall

function mustCall(address addr, bytes data) public returns (bytes)

Check .call() function and returns data

Parameters

Name	Type	Description
addr	address	Context contract address
data	bytes	Abi fubction with params

Return Values

Name	Type	Description
[0]	bytes	callData returns data from call

mustDelegateCall

function mustDelegateCall(address addr, bytes data) public returns (bytes)

Check .delegatecall() function and returns data

Parameters

Name	Type	Description
addr	address	Context contract address
data	bytes	Abi fubction with params

Return Values

Name	Type	Description
[0]	bytes	delegateCallData returns data from call

getAddress

function getAddress(address _ctxProgram) public returns (address result)

Reads a variable of type address

Parameters

Name	Type	Description
_ctxProgram	address	ProgramContext contract address

Return Values

Name	Type	Description
result	address	The address value

getUint256

function getUint256(address _ctxProgram, address) public returns (uint256 result)

Reads a uint256 number from the program

Parameters

Name	Type	Description
_ctxProgram	address	ProgramContext contract address
	address

Return Values

Name	Type	Description
result	uint256	uint256 value from the program

getLocalVar

function getLocalVar(address _ctxProgram, string _funcSignature) public returns (bytes32 result)

Read local variable by delegatecalling a "read" function by its signature

Parameters

Name	Type	Description
_ctxProgram	address	ProgramContext contract address
_funcSignature	string	Signature of the "read" function

Return Values

Name	Type	Description
result	bytes32	Local variable value