Dice Functions for Mocha

integer dice_val.roll;: Rolls the dice described by dice_val and returns the result.
integer dice_val.number;: Returns the number of dice (e.g., 3D8+4 uses 3 dice).
integer dice_val.type;: Returns the type of dice (e.g., 3D8+4 uses 8-sided dice).
integer dice_val.add;: Returns the modifier to the base dice (e.g., 3D8+4 adds 4 to the roll of 3D8).
integer dice_val.average;: Returns the average roll for a set of dice. Since the function returns an integer, fractional averages are discarded--use the power function below to return fractional averages.
integer dice_val.power;: Returns twice the average roll for a set of dice (a value which is always an integer).
dice make_dice (integer number, integer type, integer add);: Make a dice value given the number and type of dice and the modifier for the roll. The number of dice must be in the range 0 to 127; the type of dice must be in the range 1 to 127; the modifier must be in the range -128 to 127.