package tokenize

// move updates the position of the cursor, based on the provided input string.
// The input string represents the runes that the cursor must be moved over.
// This method will take newlines into account to keep track of line numbers and
// column positions automatically.
func (f *stackFrame) moveCursor(input string) *stackFrame {
	for _, r := range input {
		f.moveCursorByRune(r)
	}
	return f
}

func (f *stackFrame) moveCursorByRune(r rune) {
	if r == '\n' {
		f.column = 0
		f.line++
	} else {
		f.column++
	}
}

func (f *stackFrame) moveCursorByByte(b byte) {
	if b == '\n' {
		f.column = 0
		f.line++
	} else {
		f.column++
	}
}