The PLOptionTable structure is used by
plMergeOpts to pass information on user-defined command line
options to PLplot. The structure contains the following fields:
opt
(PLCHAR_VECTOR)
Name of option.
handler
(int (*func) (PLCHAR_VECTOR, PLCHAR_VECTOR, PLPointer))
User-defined handler function to be called when option is set. A NULL value indicates that no user-defined handler is required.
client_data
(PLPointer)
A pointer to client data. A NULL value indicates that no client data is required.
var
(PLPointer)
A pointer to a variable to be set to the value specified on the command-line option.
mode
(long)
Type of variable var. Allowed values
are PL_OPT_FUNC, PL_OPT_BOOL, PL_OPT_INT, PL_OPT_FLOAT,
PL_OPT_STRING.
syntax
(PLCHAR_VECTOR)
Syntax for option (used in the usage message).
desc
(PLCHAR_VECTOR)
Description of the option (used in the usage message).