package asm

import (
	"fmt"
	"math"
)

// MemoryLabel operates with a memory address and a number.
type MemoryLabel struct {
	Label   string
	Address Memory
}

// String returns a human readable version.
func (data *MemoryLabel) String() string {
	if data.Address.OffsetRegister == math.MaxUint8 {
		return fmt.Sprintf("%dB [%s+%d], %s", data.Address.Length, data.Address.Base, data.Address.Offset, data.Label)
	}

	return fmt.Sprintf("%dB [%s+%s+%d], %s", data.Address.Length, data.Address.Base, data.Address.OffsetRegister, data.Address.Offset, data.Label)
}

// MemoryLabel adds an instruction with a memory address and a label.
func (a *Assembler) MemoryLabel(mnemonic Mnemonic, address Memory, label string) {
	a.Instructions = append(a.Instructions, Instruction{
		Mnemonic: mnemonic,
		Data: &MemoryLabel{
			Address: address,
			Label:   label,
		},
	})
}