- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-/* Also, see comments at beginning of arith.c. */
-
-#define BITS_PER_BYTE 8 /* number of bits in each sizeof unit */
-#define BITS_PER_TARLONG 42 /* wanted number of bits in each tarlong */
-
-/* In all cases, tarlong is the proper type for a big number.
-
- For simulated arithmetic, SUPERDIGIT is the base, TARLONG_FORMAT is the
- format to print a single super-digit filled with zeroes to the left, and
- BITS_PER_SUPERDIGIT is the smallest number of bits required to fully
- represent each super-digit. LONGS_PER_TARLONG says how many longs are
- required for a full tarlong, and SIZEOF_TARLONG is the size of a tarlong
- in bytes.
-
- For straight compiler arithmetic, SUPERDIGIT is zero and TARLONG_FORMAT
- is the format to directly print a tarlong (without zero-filling).
-
- The values of SIZEOF_LONG_LONG and SIZEOF_UNSIGNED_LONG, below, are
- obtained through the configuration process. */
-
-#if BITS_PER_BYTE * SIZEOF_UNSIGNED_LONG >= BITS_PER_TARLONG
-# define SUPERDIGIT 0
-# define TARLONG_FORMAT "%uld"
-typedef unsigned long tarlong;
-#else
-# if BITS_PER_BYTE * SIZEOF_LONG_LONG >= BITS_PER_TARLONG + 1
-# define SUPERDIGIT 0
-# define TARLONG_FORMAT "%lld"
-typedef long long tarlong;
-# else
-# if BITS_PER_BYTE * SIZEOF_UNSIGNED_LONG >= 64
-# define SUPERDIGIT 1000000000L
-# define BITS_PER_SUPERDIGIT 29
-# define TARLONG_FORMAT "%09uld"
-# else
-# if BITS_PER_BYTE * SIZEOF_UNSIGNED_LONG >= 32
-# define SUPERDIGIT 10000L
-# define BITS_PER_SUPERDIGIT 14
-# define TARLONG_FORMAT "%04uld"
-# endif
-# endif
-# endif
-#endif
-
-#if SUPERDIGIT
-
-# define LONGS_PER_TARLONG \
- ((BITS_PER_TARLONG + BITS_PER_SUPERDIGIT - 1) / BITS_PER_SUPERDIGIT)
-# define SIZEOF_TARLONG (LONGS_PER_TARLONG * sizeof (unsigned long))
-
-/* The NEC EWS 4.2 C compiler gets confused by a pointer to a typedef that
- is an array. So we wrap the array into a struct. (Pouah!) */
-
-struct tarlong
-{
- unsigned long digit[LONGS_PER_TARLONG];
-};
-
-typedef struct tarlong tarlong;
-
-int zerop_tarlong_helper PARAMS ((unsigned long *));
-int lessp_tarlong_helper PARAMS ((unsigned long *, unsigned long *));
-void clear_tarlong_helper PARAMS ((unsigned long *));
-void add_to_tarlong_helper PARAMS ((unsigned long *, int));
-void mult_tarlong_helper PARAMS ((unsigned long *, int));
-void print_tarlong_helper PARAMS ((unsigned long *, FILE *));
-
-# define zerop_tarlong(Accumulator) \
- zerop_tarlong_helper (&(Accumulator).digit[0])
-
-# define lessp_tarlong(First, Second) \
- lessp_tarlong_helper (&(First).digit[0], &(Second).digit[0])
-
-# define clear_tarlong(Accumulator) \
- clear_tarlong_helper (&(Accumulator).digit[0])
-
-# define add_to_tarlong(Accumulator, Value) \
- add_to_tarlong_helper (&(Accumulator).digit[0], (Value))
-
-# define mult_tarlong(Accumulator, Value) \
- mult_tarlong_helper (&(Accumulator).digit[0], (Value))
-
-# define print_tarlong(Accumulator, File) \
- print_tarlong_helper (&(Accumulator).digit[0], (File))
-
-#else /* not SUPERDIGIT */
-
-# define zerop_tarlong(Accumulator) \
- ((Accumulator) == 0)
-
-# define lessp_tarlong(First, Second) \
- ((First) < (Second))
-
-# define clear_tarlong(Accumulator) \
- ((Accumulator) = 0)
-
-# define add_to_tarlong(Accumulator, Value) \
- ((Accumulator) += (Value))
-
-# define mult_tarlong(Accumulator, Value) \
- ((Accumulator) *= (Value))
-
-# define print_tarlong(Accumulator, File) \
- (fprintf ((File), TARLONG_FORMAT, (Accumulator)))
-
-#endif /* not SUPERDIGIT */
projects / chaz / tar / commitdiff
