factor/vm/bignum.hpp

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Portions copyright (C) 2004-2007 Slava Pestov

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#define BIGNUM_OUT_OF_BAND ((F_BIGNUM *) 0)

enum bignum_comparison
{
  bignum_comparison_equal = 0,
  bignum_comparison_less = -1,
  bignum_comparison_greater = 1
};

int bignum_equal_p(F_BIGNUM *, F_BIGNUM *);
enum bignum_comparison bignum_compare(F_BIGNUM *, F_BIGNUM *);
F_BIGNUM * bignum_add(F_BIGNUM *, F_BIGNUM *);
F_BIGNUM * bignum_subtract(F_BIGNUM *, F_BIGNUM *);
F_BIGNUM * bignum_negate(F_BIGNUM *);
F_BIGNUM * bignum_multiply(F_BIGNUM *, F_BIGNUM *);
void
bignum_divide(F_BIGNUM * numerator, F_BIGNUM * denominator,
		  F_BIGNUM * * quotient, F_BIGNUM * * remainder);
F_BIGNUM * bignum_quotient(F_BIGNUM *, F_BIGNUM *);
F_BIGNUM * bignum_remainder(F_BIGNUM *, F_BIGNUM *);
F_BIGNUM * fixnum_to_bignum(F_FIXNUM);
F_BIGNUM * cell_to_bignum(CELL);
F_BIGNUM * long_long_to_bignum(s64 n);
F_BIGNUM * ulong_long_to_bignum(u64 n);
F_FIXNUM bignum_to_fixnum(F_BIGNUM *);
CELL bignum_to_cell(F_BIGNUM *);
s64 bignum_to_long_long(F_BIGNUM *);
u64 bignum_to_ulong_long(F_BIGNUM *);
F_BIGNUM * double_to_bignum(double);
double bignum_to_double(F_BIGNUM *);

/* Added bitwise operators. */

F_BIGNUM * bignum_bitwise_not(F_BIGNUM *);
F_BIGNUM * bignum_arithmetic_shift(F_BIGNUM *, F_FIXNUM);
F_BIGNUM * bignum_bitwise_and(F_BIGNUM *, F_BIGNUM *);
F_BIGNUM * bignum_bitwise_ior(F_BIGNUM *, F_BIGNUM *);
F_BIGNUM * bignum_bitwise_xor(F_BIGNUM *, F_BIGNUM *);

/* Forward references */
int bignum_equal_p_unsigned(F_BIGNUM *, F_BIGNUM *);
enum bignum_comparison bignum_compare_unsigned(F_BIGNUM *, F_BIGNUM *);
F_BIGNUM * bignum_add_unsigned(F_BIGNUM *, F_BIGNUM *, int);
F_BIGNUM * bignum_subtract_unsigned(F_BIGNUM *, F_BIGNUM *);
F_BIGNUM * bignum_multiply_unsigned(F_BIGNUM *, F_BIGNUM *, int);
F_BIGNUM * bignum_multiply_unsigned_small_factor
  (F_BIGNUM *, bignum_digit_type, int);
void bignum_destructive_scale_up(F_BIGNUM *, bignum_digit_type);
void bignum_destructive_add(F_BIGNUM *, bignum_digit_type);
void bignum_divide_unsigned_large_denominator
  (F_BIGNUM *, F_BIGNUM *, F_BIGNUM * *, F_BIGNUM * *, int, int);
void bignum_destructive_normalization(F_BIGNUM *, F_BIGNUM *, int);
void bignum_destructive_unnormalization(F_BIGNUM *, int);
void bignum_divide_unsigned_normalized(F_BIGNUM *, F_BIGNUM *, F_BIGNUM *);
bignum_digit_type bignum_divide_subtract
  (bignum_digit_type *, bignum_digit_type *, bignum_digit_type,
   bignum_digit_type *);
void bignum_divide_unsigned_medium_denominator
  (F_BIGNUM *, bignum_digit_type, F_BIGNUM * *, F_BIGNUM * *, int, int);
bignum_digit_type bignum_digit_divide
  (bignum_digit_type, bignum_digit_type, bignum_digit_type, bignum_digit_type *);
bignum_digit_type bignum_digit_divide_subtract
  (bignum_digit_type, bignum_digit_type, bignum_digit_type, bignum_digit_type *);
void bignum_divide_unsigned_small_denominator
  (F_BIGNUM *, bignum_digit_type, F_BIGNUM * *, F_BIGNUM * *, int, int);
bignum_digit_type bignum_destructive_scale_down
  (F_BIGNUM *, bignum_digit_type);
F_BIGNUM * bignum_remainder_unsigned_small_denominator
  (F_BIGNUM *, bignum_digit_type, int);
F_BIGNUM * bignum_digit_to_bignum(bignum_digit_type, int);
F_BIGNUM * allot_bignum(bignum_length_type, int);
F_BIGNUM * allot_bignum_zeroed(bignum_length_type, int);
F_BIGNUM * bignum_shorten_length(F_BIGNUM *, bignum_length_type);
F_BIGNUM * bignum_trim(F_BIGNUM *);
F_BIGNUM * bignum_new_sign(F_BIGNUM *, int);
F_BIGNUM * bignum_maybe_new_sign(F_BIGNUM *, int);
void bignum_destructive_copy(F_BIGNUM *, F_BIGNUM *);

/* Added for bitwise operations. */
F_BIGNUM * bignum_magnitude_ash(F_BIGNUM * arg1, F_FIXNUM n);
F_BIGNUM * bignum_pospos_bitwise_op(int op, F_BIGNUM *, F_BIGNUM *);
F_BIGNUM * bignum_posneg_bitwise_op(int op, F_BIGNUM *, F_BIGNUM *);
F_BIGNUM * bignum_negneg_bitwise_op(int op, F_BIGNUM *, F_BIGNUM *);
void        bignum_negate_magnitude(F_BIGNUM *);

F_BIGNUM * bignum_integer_length(F_BIGNUM * arg1);
int bignum_unsigned_logbitp(int shift, F_BIGNUM * bignum);
int bignum_logbitp(int shift, F_BIGNUM * arg);
F_BIGNUM * digit_stream_to_bignum(unsigned int n_digits,
                                   unsigned int (*producer)(unsigned int),
                                   unsigned int radix,
                                   int negative_p);