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#ifndef INTERNAL_BIGNUM_H /* -*- C -*- */
#define INTERNAL_BIGNUM_H
/**
* @file
* @brief Internal header for Bignums.
* @author \@shyouhei
* @copyright This file is a part of the programming language Ruby.
* Permission is hereby granted, to either redistribute and/or
* modify this file, provided that the conditions mentioned in the
* file COPYING are met. Consult the file for details.
*/
#ifndef BDIGIT
# if SIZEOF_INT*2 <= SIZEOF_LONG_LONG
# define BDIGIT unsigned int
# define SIZEOF_BDIGIT SIZEOF_INT
# define BDIGIT_DBL unsigned LONG_LONG
# define BDIGIT_DBL_SIGNED LONG_LONG
# define PRI_BDIGIT_PREFIX ""
# define PRI_BDIGIT_DBL_PREFIX PRI_LL_PREFIX
# elif SIZEOF_INT*2 <= SIZEOF_LONG
# define BDIGIT unsigned int
# define SIZEOF_BDIGIT SIZEOF_INT
# define BDIGIT_DBL unsigned long
# define BDIGIT_DBL_SIGNED long
# define PRI_BDIGIT_PREFIX ""
# define PRI_BDIGIT_DBL_PREFIX "l"
# elif SIZEOF_SHORT*2 <= SIZEOF_LONG
# define BDIGIT unsigned short
# define SIZEOF_BDIGIT SIZEOF_SHORT
# define BDIGIT_DBL unsigned long
# define BDIGIT_DBL_SIGNED long
# define PRI_BDIGIT_PREFIX "h"
# define PRI_BDIGIT_DBL_PREFIX "l"
# else
# define BDIGIT unsigned short
# define SIZEOF_BDIGIT (SIZEOF_LONG/2)
# define SIZEOF_ACTUAL_BDIGIT SIZEOF_LONG
# define BDIGIT_DBL unsigned long
# define BDIGIT_DBL_SIGNED long
# define PRI_BDIGIT_PREFIX "h"
# define PRI_BDIGIT_DBL_PREFIX "l"
# endif
#endif
#ifndef SIZEOF_ACTUAL_BDIGIT
# define SIZEOF_ACTUAL_BDIGIT SIZEOF_BDIGIT
#endif
#ifdef PRI_BDIGIT_PREFIX
# define PRIdBDIGIT PRI_BDIGIT_PREFIX"d"
# define PRIiBDIGIT PRI_BDIGIT_PREFIX"i"
# define PRIoBDIGIT PRI_BDIGIT_PREFIX"o"
# define PRIuBDIGIT PRI_BDIGIT_PREFIX"u"
# define PRIxBDIGIT PRI_BDIGIT_PREFIX"x"
# define PRIXBDIGIT PRI_BDIGIT_PREFIX"X"
#endif
#ifdef PRI_BDIGIT_DBL_PREFIX
# define PRIdBDIGIT_DBL PRI_BDIGIT_DBL_PREFIX"d"
# define PRIiBDIGIT_DBL PRI_BDIGIT_DBL_PREFIX"i"
# define PRIoBDIGIT_DBL PRI_BDIGIT_DBL_PREFIX"o"
# define PRIuBDIGIT_DBL PRI_BDIGIT_DBL_PREFIX"u"
# define PRIxBDIGIT_DBL PRI_BDIGIT_DBL_PREFIX"x"
# define PRIXBDIGIT_DBL PRI_BDIGIT_DBL_PREFIX"X"
#endif
#define BIGNUM_EMBED_LEN_NUMBITS 3
#ifndef BIGNUM_EMBED_LEN_MAX
# if (SIZEOF_VALUE*RVALUE_EMBED_LEN_MAX/SIZEOF_ACTUAL_BDIGIT) < (1 << BIGNUM_EMBED_LEN_NUMBITS)-1
# define BIGNUM_EMBED_LEN_MAX (SIZEOF_VALUE*RVALUE_EMBED_LEN_MAX/SIZEOF_ACTUAL_BDIGIT)
# else
# define BIGNUM_EMBED_LEN_MAX ((1 << BIGNUM_EMBED_LEN_NUMBITS)-1)
# endif
#endif
struct RBignum {
struct RBasic basic;
union {
struct {
size_t len;
BDIGIT *digits;
} heap;
BDIGIT ary[BIGNUM_EMBED_LEN_MAX];
} as;
};
#define BIGNUM_SIGN_BIT ((VALUE)FL_USER1)
/* sign: positive:1, negative:0 */
#define BIGNUM_SIGN(b) ((RBASIC(b)->flags & BIGNUM_SIGN_BIT) != 0)
#define BIGNUM_SET_SIGN(b,sign) \
((sign) ? (RBASIC(b)->flags |= BIGNUM_SIGN_BIT) \
: (RBASIC(b)->flags &= ~BIGNUM_SIGN_BIT))
#define BIGNUM_POSITIVE_P(b) BIGNUM_SIGN(b)
#define BIGNUM_NEGATIVE_P(b) (!BIGNUM_SIGN(b))
#define BIGNUM_NEGATE(b) (RBASIC(b)->flags ^= BIGNUM_SIGN_BIT)
#define BIGNUM_EMBED_FLAG ((VALUE)FL_USER2)
#define BIGNUM_EMBED_LEN_MASK \
(~(~(VALUE)0U << BIGNUM_EMBED_LEN_NUMBITS) << BIGNUM_EMBED_LEN_SHIFT)
#define BIGNUM_EMBED_LEN_SHIFT \
(FL_USHIFT+3) /* bit offset of BIGNUM_EMBED_LEN_MASK */
#define BIGNUM_LEN(b) \
((RBASIC(b)->flags & BIGNUM_EMBED_FLAG) ? \
(size_t)((RBASIC(b)->flags >> BIGNUM_EMBED_LEN_SHIFT) & \
(BIGNUM_EMBED_LEN_MASK >> BIGNUM_EMBED_LEN_SHIFT)) : \
RBIGNUM(b)->as.heap.len)
/* LSB:BIGNUM_DIGITS(b)[0], MSB:BIGNUM_DIGITS(b)[BIGNUM_LEN(b)-1] */
#define BIGNUM_DIGITS(b) \
((RBASIC(b)->flags & BIGNUM_EMBED_FLAG) ? \
RBIGNUM(b)->as.ary : \
RBIGNUM(b)->as.heap.digits)
#define BIGNUM_LENINT(b) rb_long2int(BIGNUM_LEN(b))
#define RBIGNUM(obj) (R_CAST(RBignum)(obj))
/* bignum.c */
extern const char ruby_digitmap[];
double rb_big_fdiv_double(VALUE x, VALUE y);
VALUE rb_big_uminus(VALUE x);
VALUE rb_big_hash(VALUE);
VALUE rb_big_odd_p(VALUE);
VALUE rb_big_even_p(VALUE);
size_t rb_big_size(VALUE);
VALUE rb_integer_float_cmp(VALUE x, VALUE y);
VALUE rb_integer_float_eq(VALUE x, VALUE y);
VALUE rb_str_convert_to_inum(VALUE str, int base, int badcheck, int raise_exception);
VALUE rb_big_comp(VALUE x);
VALUE rb_big_aref(VALUE x, VALUE y);
VALUE rb_big_abs(VALUE x);
VALUE rb_big_size_m(VALUE big);
VALUE rb_big_bit_length(VALUE big);
VALUE rb_big_remainder(VALUE x, VALUE y);
VALUE rb_big_gt(VALUE x, VALUE y);
VALUE rb_big_ge(VALUE x, VALUE y);
VALUE rb_big_lt(VALUE x, VALUE y);
VALUE rb_big_le(VALUE x, VALUE y);
VALUE rb_int_powm(int const argc, VALUE * const argv, VALUE const num);
RUBY_SYMBOL_EXPORT_BEGIN
/* bignum.c (export) */
VALUE rb_big_mul_normal(VALUE x, VALUE y);
VALUE rb_big_mul_balance(VALUE x, VALUE y);
VALUE rb_big_mul_karatsuba(VALUE x, VALUE y);
VALUE rb_big_mul_toom3(VALUE x, VALUE y);
VALUE rb_big_sq_fast(VALUE x);
VALUE rb_big_divrem_normal(VALUE x, VALUE y);
VALUE rb_big2str_poweroftwo(VALUE x, int base);
VALUE rb_big2str_generic(VALUE x, int base);
VALUE rb_str2big_poweroftwo(VALUE arg, int base, int badcheck);
VALUE rb_str2big_normal(VALUE arg, int base, int badcheck);
VALUE rb_str2big_karatsuba(VALUE arg, int base, int badcheck);
#if defined(HAVE_LIBGMP) && defined(HAVE_GMP_H)
VALUE rb_big_mul_gmp(VALUE x, VALUE y);
VALUE rb_big_divrem_gmp(VALUE x, VALUE y);
VALUE rb_big2str_gmp(VALUE x, int base);
VALUE rb_str2big_gmp(VALUE arg, int base, int badcheck);
#endif
enum rb_int_parse_flags {
RB_INT_PARSE_SIGN = 0x01,
RB_INT_PARSE_UNDERSCORE = 0x02,
RB_INT_PARSE_PREFIX = 0x04,
RB_INT_PARSE_ALL = 0x07,
RB_INT_PARSE_DEFAULT = 0x07
};
VALUE rb_int_parse_cstr(const char *str, ssize_t len, char **endp, size_t *ndigits, int base, int flags);
RUBY_SYMBOL_EXPORT_END
#endif /* INTERNAL_BIGNUM_H */
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