GPhoto2-Port-Result

#define GP_OK                            0

#define GP_ERROR_NOT_SUPPORTED		-6

#define GP_ERROR_BAD_PARAMETERS		-2

#define GP_ERROR_NO_MEMORY		-3

#define GP_ERROR_TIMEOUT                -10

#define GP_ERROR_LIBRARY		-4

#define GP_ERROR_IO			-7

#define GP_ERROR_IO_INIT                -31

#define GP_ERROR_IO_LOCK                -60

#define GP_ERROR_IO_READ                -34

#define GP_ERROR_IO_SERIAL_SPEED        -41

#define GP_ERROR_IO_SUPPORTED_SERIAL    -20

#define GP_ERROR_IO_SUPPORTED_USB       -21

#define GP_ERROR_IO_UPDATE              -37

#define GP_ERROR_IO_USB_CLAIM           -53

#define GP_ERROR_IO_USB_CLEAR_HALT      -51

#define GP_ERROR_IO_USB_FIND            -52

#define GP_ERROR_IO_WRITE               -35

#define GP_ERROR_UNKNOWN_PORT		-5

const char* gp_port_result_as_string        (int result);