Position text oled SSD1306 Arduino

pos_text.h

void displayPositionedText(char* buf, int textSize, Position vpos, Position hpos) {
    display.setTextSize(textSize);
    int16_t x1, y1;
    uint16_t w, h;
    display.getTextBounds(buf, 0, 0, &x1, &y1, &w, &h);

    int _vpos = 0, _hpos = 0;

    switch (vpos) {
        case CENTER:
            _vpos = (SCREEN_HEIGHT - h) / 2;
            break;
        case TOP:
            _vpos = 0;
            break;
        case BOTTOM:
            _vpos = SCREEN_HEIGHT - h;
            break;
        default:
            Serial.print(vpos);
            Serial.println(" is not a valid Vertical Position");
            return;
    }

    switch (hpos) {
        case CENTER:
            _hpos = (SCREEN_WIDTH - w) / 2;
            break;
        case RIGHT:
            _hpos = SCREEN_WIDTH - w;
            break;
        case LEFT:
            _hpos = 0;
            break;
        default:
            Serial.print(hpos);
            Serial.println(" is not a valid Horizontal Position");
            return;
    }

    display.setCursor(_hpos, _vpos);
    display.print(buf);
}