BIGNUM_SIGN_BIT   499 internal.h     #define BIGNUM_SIGN(b) ((RBASIC(b)->flags & BIGNUM_SIGN_BIT) != 0)
BIGNUM_SIGN_BIT   501 internal.h       ((sign) ? (RBASIC(b)->flags |= BIGNUM_SIGN_BIT) \
BIGNUM_SIGN_BIT   502 internal.h               : (RBASIC(b)->flags &= ~BIGNUM_SIGN_BIT))
BIGNUM_SIGN_BIT   505 internal.h     #define BIGNUM_NEGATE(b) (RBASIC(b)->flags ^= BIGNUM_SIGN_BIT)