Befunge93

Befunge93

Creates a new Befunge93 interpreter

Constructor

new Befunge93(onStackChangeopt, onOutputopt, onCellChangeopt, onStepopt, onInputopt)

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Parameters:
Name Type Attributes Default Description
onStackChange Befunge93~onStackChange <optional>
 null

Called when the stack is updated (pushed or popped). Supplies 1 arg, current stack
onOutput Befunge93~onOutput <optional>
 null

Called when output happens (, or . commands). Supplies 1 arg, the generated output
onCellChange Befunge93~onCellChange <optional>
 null

Called when program is changed (p command) Supplies 3 args, current x, current y, and the new value of the cell
onStep Befunge93~onStep <optional>
 null

Called when the interpreter makes a step (changing program cursor). Supplies 2 args the current X and Y values
onInput Befunge93~onInput <optional>
 null

Called when the interpreter needs user input. Supplies 1 arg, prompt message

Methods

(private) _onCellChange()

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(private) _onInput()

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(private) _onOutput()

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(private) _onStackChange()

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(private) _onStep()

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(private) add()

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(private) bridge()

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(private) discard()

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(private) divide()

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(private) down()

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(private) duplicate()

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(private) get()

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(private) getToken()

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(private) greaterThan()

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(private) horizontalIf()

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(private) inAscii()

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(private) inInt()

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(private) init()

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(private) left()

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(private) modulo()

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(private) multiply()

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(private) not()

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(private) outAscii()

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(private) outInt()

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(private) parseToken()

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pause()

Stops executing of the program

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(private) pop()

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(private) push()

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(private) pushHexValueToStack()

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(private) put()

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(private) randomDirection()

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reset()

Resets the interpreter to default state

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resume()

Allows execution of the program to continue. Does NOT actually execute any part of the program

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run(program, resetopt, onTickopt)

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Parameters:
Name Type Attributes Default Description
program string

The program to be run
reset boolean <optional>
 false

Reset interpreter to default before running?
onTick function <optional>
 null

Called every tick. Useful for benchmarking programs

(private) step()

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stepInto()

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(private) subtract()

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(private) swap()

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(private) terminateProgram()

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(private) toggleStringMode()

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(private) up()

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(private) verticalIf()

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(private, static) isHexDigit()

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Type Definitions

onCellChange(x, y, newValue)

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Parameters:
Name Type Description
x number

The changed cell's x position
y number

The changed cell's y position
newValue string

The changed cell's new value

onInput(message) → {string}

Called when the interpreter parses "~" or "&".

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Parameters:
Name Type Description
message string

The message that will be displayed to the user; can be replaced by whatever you want
Returns:
Type:
string

Input from the user. If more than 1 character, only first character is used.

onOutput(value)

Called when the interpreter parses "." or ","

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Parameters:
Name Type Description
value string

The value that was output from interpreter

onStackChange(stack)

Called when the stack is changed

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Parameters:
Name Type Description
stack array

The current stack

onStep(x, y)

Called when the interpreter's cursor position is changed

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Parameters:
Name Type Description
x number

Cursor's current X position
y number

Cursor's current y position

onTick()

Called every tick of the interpreter. Only useful for benchmarking

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