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_section: Utilities @<asm-utilities>
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_subsection: Assembler
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The assembler utilities allow parsing and assembling an
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[Ethers ASM Dialect](asm-dialect) source file.
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_property: asm.parse(code) => [[asm-node]] @<asm-parse> @SRC<asm/assembler>
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Parse an ethers-format assembly file and return the [[asm-ast]].
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2020-05-08 03:24:40 -04:00
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_property: asm.assemble(node) => string<[[DataHexString]]> @SRC<asm/assembler:function.assemble>
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Performs assembly of the [[asm-ast]] //node// and return the
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resulting bytecode representation.
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_subsection: Disassembler
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The **Disassembler** utilities make it easy to convert bytecode
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into an object which can easily be examined for program structure.
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_property: asm.disassemble(bytecode) => [[asm-bytecode]] @SRC<asm/assembler>
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Returns an array of Operations given //bytecode//.
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_property: asm.formatBytecode(operations) => string @SRC<asm/assembler>
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Create a formatted output of an array of [[asm-operation]].
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_heading: Bytecode @<asm-bytecode> @INHERIT<Array\<[[asm-operation]]\>>
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2020-10-03 13:30:15 -03:00
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Each array index represents an operation, collapsing multi-byte operations
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(i.e. ``PUSH``) into a single operation.
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_property: bytecode.getOperation(offset) => [[asm-operation]]
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Get the operation at a given //offset// into the bytecode. This ensures that
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the byte at //offset// is an operation and not data contained within a ``PUSH``,
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in which case null it returned.
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_heading: Operation @<asm-operation>
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An **Operation** is a single command from a disassembled bytecode
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stream.
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_property: operation.opcode => [[asm-opcode]]
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The opcode for this Operation.
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_property: operation.offset => number
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The offset into the bytecode for this Operation.
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2020-05-08 03:24:40 -04:00
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_property: operation.pushValue => string<[[DataHexString]]>
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If the opcode is a ``PUSH``, this is the value of that push
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_subsection: Opcode @<asm-opcode> @SRC<asm/opcodes:class.Opcode>
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_property: asm.Opcode.from(valueOrMnemonic) => [[asm-opcode]]
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Create a new instance of an Opcode for a given numeric value
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(e.g. 0x60 is PUSH1) or mnemonic string (e.g. "PUSH1").
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_heading: Properties
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_property: opcode.value => number
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The value (bytecode as a number) of this opcode.
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_property: opcode.mnemonic => string
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The mnemonic string of this opcode.
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_property: opcode.delta => number
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The number of items this opcode will consume from the stack.
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_property: opcode.alpha => number
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The number of items this opcode will push onto the stack.
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_property: opcode.doc => string
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A short description of what this opcode does.
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_property: opcode.isMemory() => "read" | "write" | "full"
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Returns true if the opcode accesses memory.
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_property: opcode.isStatic() => boolean
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Returns true if the opcode cannot change state.
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_property: opcode.isJump() => boolean
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Returns true if the opcode is a jumper operation.
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_property: opcode.isPush() => number
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Returns 0 if the opcode is not a ``PUSH*``, or the number
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of bytes this opcode will push if it is.
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