/usr/include/bobcat/bigint is in libbobcat-dev 3.19.01-1ubuntu1.
This file is owned by root:root, with mode 0o644.
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#define INCLUDED_BOBCAT_BIGINT_
#include <iosfwd>
#include <vector>
#include <openssl/bn.h>
namespace FBB
{
class BigInt
{
friend std::ostream &operator<<(std::ostream &out, BigInt const &bn);
BIGNUM d_bn;
public:
typedef BN_ULONG Word;
enum Msb
{
MSB_UNKNOWN = -1,
MSB_IS_ONE,
TOP_TWO_BITS_ONE
};
enum Lsb
{
EVEN,
ODD,
};
enum PrimeType
{
ANY = false,
SAFE = true
};
BigInt(); // 1
BigInt(BigInt const &other); // 3
template<typename Type> // promotion OK
BigInt(Type value);
explicit BigInt(BIGNUM const &bignum); // 2
explicit BigInt(BIGNUM const *bignum); // 4
BigInt(char const *bigEndian, size_t length, bool negative = false);
// 5
explicit BigInt(std::string const &bigEndian, bool negative = false);
// 6
~BigInt();
BigInt &operator=(BigInt const &other);
BigInt operator-() const;
BigInt &negate();
BigInt negatec() const;
BigInt &setNegative(bool negative);
BigInt setNegativec(bool negative) const;
bool isNegative() const; // .f
BigInt &tildeBits();
BigInt tildeBitsc() const;
BigInt &tildeInt();
BigInt tildeIntc() const;
BigInt &operator--(); // opdec.f
BigInt operator--(int);
BigInt &operator++(); // opinc.f
BigInt operator++(int);
class Bit;
Bit operator[](size_t idx); // opindex.f
// non-const BigInts:
// distinguishes lhs/rhs
int operator[](size_t idx) const; // opindexc.f
// only rhs for const BigInts
class Bit
{
friend Bit BigInt::operator[](size_t idx);
friend std::ostream &operator<<(std::ostream &out,
Bit const &bit);
BigInt &d_bi;
size_t d_idx;
public:
operator bool() const;
Bit &operator=(bool rhs); // assign a bit
Bit &operator&=(bool rhs); // bit_and a bit
Bit &operator|=(bool rhs); // bit_or a bit
Bit &operator^=(bool rhs); // bit_xor a bit
private:
Bit(BigInt &bi, size_t idx);
};
char *bigEndian() const;
BigInt &operator+=(BigInt const &rhs); // opaddis.f
BigInt &addMod(BigInt const &rhs, BigInt const &mod); // .f
BigInt addModc(BigInt const &rhs, BigInt const &mod) const;
BigInt &operator-=(BigInt const &rhs); // opsubis.f
BigInt &subMod(BigInt const &rhs, BigInt const &mod); // .f
BigInt subModc(BigInt const &rhs, BigInt const &mod) const;
BigInt &operator*=(BigInt const &rhs);
BigInt &mulMod(BigInt const &rhs, BigInt const &mod); // .f
BigInt mulModc(BigInt const &rhs, BigInt const &mod) const;
BigInt &operator%=(BigInt const &rhs);
BigInt &operator/=(BigInt const &rhs); // integer division,
// integer division, also
// returning remainder
BigInt &div(BigInt *remainder, BigInt const &rhs);
BigInt divc(BigInt *remainder, BigInt const &rhs) const;
BigInt &sqr();
BigInt sqrc() const;
BigInt &sqrMod(BigInt const &mod); // .f
BigInt sqrModc(BigInt const &mod) const;
BigInt &operator&=(BigInt const &rhs);
BigInt &operator|=(BigInt const &rhs);
BigInt &operator^=(BigInt const &rhs);
bool isZero() const; // .f
bool isOne() const; // .f
bool isOdd() const; // .f
unsigned long ulong() const; // .f
BIGNUM const &bignum() const; // .f
size_t sizeInBytes() const; // .f
size_t size() const; // .f
size_t nWords() const; // .f
static size_t constexpr sizeOfWord(); // .f
Word at(size_t index) const;
void setWord(size_t index, Word value);
int compare(BigInt const &other) const; // .f
int uCompare(BigInt const &other) const; // .f
long long diophantus(long long *factor1, long long *factor2,
long long const &value1,
long long const &value2);
BigInt diophantus(BigInt *factor1, BigInt *factor2,
BigInt const &value1, BigInt const &value2);
BigInt &exp(BigInt const &exponent);
BigInt expc(BigInt const &exponent) const;
BigInt &expMod(BigInt const &exponent, BigInt const &mod);
BigInt expModc(BigInt const &exponent, BigInt const &mod) const;
BigInt &gcd(BigInt const &rhs);
BigInt gcdc(BigInt const &rhs) const;
BigInt &inverseMod(BigInt const &mod);
BigInt inverseModc(BigInt const &mod) const;
BigInt &isqrt();
BigInt isqrtc() const;
static BigInt rand(size_t bitsSize,
Msb msb = MSB_IS_ONE, Lsb lsb = ODD);
static BigInt randRange(BigInt const &max);
static BigInt setBigEndian(std::string const &bytes);
static BigInt pseudoRand(size_t bitsSize,
Msb msb = MSB_IS_ONE, Lsb lsb = ODD);
static BigInt pseudoRandRange(BigInt const &max);
static BigInt prime(size_t nBits,
BigInt const *add = 0, BigInt const *rem = 0,
PrimeType primeType = ANY);
static BigInt fromText(std::string const &text, int mode = 0);
BigInt &clearBit(size_t index);
BigInt clearBit(size_t index) const;
bool hasBit(size_t index) const; // .f
BigInt &maskBits(size_t lowerNBits);
BigInt maskBitsc(size_t lowerNBits) const;
BigInt &setBit(size_t index);
BigInt setBitc(size_t index) const;
BigInt &setBit(size_t index, bool value);
BigInt setBitc(size_t index, bool value) const;
BigInt &lshift();
BigInt lshiftc() const;
BigInt &lshift(size_t nBits);
BigInt lshiftc(size_t nBits) const;
BigInt &operator<<=(size_t nBits); // opshlis.f
BigInt &rshift();
BigInt rshiftc() const;
BigInt &rshift(size_t nBits);
BigInt rshiftc(size_t nBits) const;
BigInt &operator>>=(size_t nBits); // opshris.f
void swap(BigInt &other);
private:
void mod_inverse(BigInt *ret, BigInt const &mod) const;
std::ostream &insertInto(std::ostream &out) const;
static char *bn2oct(BIGNUM const *bn);
void copy(BIGNUM *lhs, BIGNUM const &rhs);
void nWordsCheck(size_t index) const;
BigInt &checked1(
int (*BN_op)(BIGNUM *,
BIGNUM const *, BIGNUM const *),
BigInt const &rhs, char const *op);
BigInt &checked2(int (*BN_op)(BIGNUM *,
BIGNUM const *, BIGNUM const *,
BIGNUM const *,
BN_CTX *),
BigInt const &rhs, BigInt const &mod,
char const *op);
void checked3(BIGNUM *div, BIGNUM *rem,
BigInt const &rhs, char const *op) const;
BigInt &checked4(int (*BN_op)(BIGNUM *,
BIGNUM const *, BIGNUM const *,
BN_CTX *),
BigInt const &rhs, char const *op);
static void primeCallback(int reason, int primeNr, void *primeBase);
static bool addDigit(char ch, BigInt &ret, BigInt const &radix,
int (*pConv)(int));
};
template<typename Type>
BigInt::BigInt(Type value)
{
bool negative = value < 0;
if (negative)
value = -value;
BN_init(&d_bn);
BN_set_word(&d_bn, static_cast<unsigned long>(value));
if (negative)
negate();
}
inline size_t BigInt::nWords() const
{
return d_bn.top;
}
inline BigInt &BigInt::addMod(BigInt const &rhs, BigInt const &mod)
{
return checked2(BN_mod_add, rhs, mod, "addMod");
}
inline BIGNUM const &BigInt::bignum() const
{
return d_bn;
}
inline int BigInt::compare(BigInt const &other) const
{
return BN_cmp(&d_bn, &other.d_bn);
}
inline bool BigInt::hasBit(size_t index) const
{
return BN_is_bit_set(&this->d_bn, index);
}
inline bool BigInt::isNegative() const
{
return BN_is_negative(&this->d_bn);
}
inline bool BigInt::isOdd() const
{
return BN_is_odd(&d_bn);
}
inline bool BigInt::isOne() const
{
return BN_is_one(&d_bn);
}
inline bool BigInt::isZero() const
{
return BN_is_zero(&d_bn);
}
inline BigInt &BigInt::mulMod(BigInt const &rhs, BigInt const &mod)
{
return checked2(BN_mod_mul, rhs, mod, "mulMod");
}
inline BigInt &BigInt::operator+=(BigInt const &rhs)
{
return checked1(BN_add, rhs, "+");
}
inline BigInt::Bit::operator bool() const
{
return d_bi.hasBit(d_idx);
}
inline BigInt &BigInt::operator--()
{
return *this -= 1;
}
inline BigInt &BigInt::operator++()
{
return *this += 1;
}
inline BigInt::Bit BigInt::operator[](size_t idx)
{
Bit bit(*this, idx);
return bit;
}
inline int BigInt::operator[](size_t idx) const
{
return hasBit(idx);
}
inline BigInt &BigInt::operator<<=(size_t nBits)
{
return lshift(nBits);
}
inline BigInt &BigInt::operator>>=(size_t nBits)
{
return rshift(nBits);
}
inline BigInt &BigInt::operator-=(BigInt const &rhs)
{
return checked1(BN_sub, rhs, "-");
}
inline size_t BigInt::size() const
{
return BN_num_bits(&d_bn);
}
inline size_t BigInt::sizeInBytes() const
{
return BN_num_bytes(&d_bn);
}
size_t constexpr BigInt::sizeOfWord()
{
return sizeof(Word);
}
inline BigInt &BigInt::sqrMod(BigInt const &mod)
{
return checked4(BN_mod_sqr, mod, "sqrMod");
}
inline BigInt &BigInt::subMod(BigInt const &rhs, BigInt const &mod)
{
return checked2(BN_mod_sub, rhs, mod, "subMod");
}
inline int BigInt::uCompare(BigInt const &other) const
{
return BN_ucmp(&d_bn, &other.d_bn);
}
// Free functions
BigInt operator*(BigInt const &lhs, BigInt const &rhs);
BigInt operator/(BigInt const &lhs, BigInt const &rhs);
BigInt operator%(BigInt const &lhs, BigInt const &rhs);
BigInt operator+(BigInt const &lhs, BigInt const &rhs);
BigInt operator-(BigInt const &lhs, BigInt const &rhs);
BigInt operator>>(BigInt const &lhs, size_t rhs);
BigInt operator<<(BigInt const &lhs, size_t rhs);
BigInt operator|(BigInt const &lhs, BigInt const &rhs);
BigInt operator&(BigInt const &lhs, BigInt const &rhs);
BigInt operator^(BigInt const &lhs, BigInt const &rhs);
BigInt gcd(BigInt const &lhs, BigInt const &rhs);
BigInt inverseMod(BigInt const &lhs, BigInt const &mod);
std::istream &operator>>(std::istream &out, BigInt &bn);
int isoctdigit(int ch);
inline bool operator>(BigInt const &lhs, BigInt const &rhs)
{
return lhs.compare(rhs) > 0;
}
inline bool operator>=(BigInt const &lhs, BigInt const &rhs)
{
return lhs.compare(rhs) >= 0;
}
inline std::ostream &operator<<(std::ostream &out, BigInt const &bn)
{
return bn.insertInto(out);
}
inline bool operator==(BigInt const &lhs, BigInt const &rhs)
{
return lhs.compare(rhs) == 0;
}
inline bool operator!=(BigInt const &lhs, BigInt const &rhs)
{
return lhs.compare(rhs) != 0;
}
inline bool operator<(BigInt const &lhs, BigInt const &rhs)
{
return lhs.compare(rhs) < 0;
}
inline bool operator<=(BigInt const &lhs, BigInt const &rhs)
{
return lhs.compare(rhs) <= 0;
}
} // namespace FBB
#endif
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