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/* ** Copyright UCAR (c) 1990 - 2016                                         */
/* ** University Corporation for Atmospheric Research (UCAR)                 */
/* ** National Center for Atmospheric Research (NCAR)                        */
/* ** Boulder, Colorado, USA                                                 */
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#define gb_next_rand() (*gb_fptr>=0?*gb_fptr--:gb_flip_cycle())
#define two_to_the_31 ((unsigned long) 0x80000000)  \

extern long *gb_fptr;
extern long gb_flip_cycle(void);
extern void gb_init_rand(long seed);
extern long gb_unif_rand(long m);
extern double rand_in_range(double minval, double maxval);