The parameters to pass to functions can be any of a few simple types as defined in <sweep/sweep_types.h>: SWEEP_TYPE_BOOL, SWEEP_TYPE_INT, SWEEP_TYPE_FLOAT, SWEEP_TYPE_STRING.

A parameter object is a union which can take any of these values. A parameter set is defined as a pointer to a sequence of parameters.

Information about a parameter accepted by a procedure is stored in a parameter specification object, as defined in

There are two ways of defining constraints on parameter values accepted by the procedure; additionally, you can specify that the values for a parameter are completely unconstrained.

• SW_PARAM_CONSTRAINED_NOT
• SW_PARAM_CONSTRAINED_LIST indicates that the parameter is constrained to values given in a list.
• SW_PARAM_CONSTRAINED_RANGE indicates that the parameter is constrained to a given range.

A few hints exist which Sweep can use to provide different graphical input methods as appropriate:

• SW_PARAM_HINT_LOGARITHMIC indicates that the parameter should be interpreted as logarithmic.
• SW_PARAM_HINT_TIME indicates that the parameter should be interpreted as a time.
• SW_PARAM_HINT_FILENAME indicates that the parameter should be interpreted as a valid filename on the user's system.