intcode

Documentation

Overview

Package intcode implements an intcode computer.

Index

• type Computer
  • func NewComputer(opcodes []int) *Computer
  • func (c *Computer) StartProgram()
  • func (c *Computer) Value(idx int) int

Types

type Computer

type Computer struct {
	Done   chan struct{}
	Input  chan int
	Output chan int
	Err    chan error
	// contains filtered or unexported fields
}

Computer is an opcode computer. Input is read through the Input channel, output from the Output channel; the "halt" instruction closes the Done channel, and any errors can be read from the Err channel.

func NewComputer

func NewComputer(opcodes []int) *Computer

NewComputer returns an opcode computer with its memory initalized to opcodes.

func (*Computer) StartProgram

func (c *Computer) StartProgram()

StartProgram starts a goroutine that executes the program in the memory of the computer. It is typically used like this:

Loop:
    for {
        select {
        case v := <-c.Output:
            // Do something with output.
        case <-c.Done:
            break Loop
        case err := <-c.Err:
            // Handle error.
        }
    }

func (*Computer) Value

func (c *Computer) Value(idx int) int

Value returns the value at position idx; if the index is out of range, extra memory is appended.