int clientIndex = 0;
int buttons = *(int *)(getPlayerState(clientIndex) + 0x2D68 + 0x6C5);
for(;;)
{
    if (Dvar_GetBool("cl_ingame"))
    {

        if (Key_Down(buttons, 0x01/*button enum here*/))
        {

        }

        clientIndex++;
    }
}