fc::bigint Class Reference

#include <bigint.hpp>

Public Member Functions
	bigint (const std::vector< char > &bige)
	bigint (const char *bige, uint32_t l)
	bigint (uint64_t value)
	bigint ()
	bigint (const bigint &c)
	bigint (bigint &&c)
	bigint (BIGNUM *n)
	~bigint ()
bigint &	operator= (const bigint &a)
bigint &	operator= (bigint &&a)
	operator bool () const
bool	is_negative () const
int64_t	to_int64 () const
int64_t	log2 () const
bigint	exp (const bigint &c) const
bool	operator< (const bigint &c) const
bool	operator> (const bigint &c) const
bool	operator>= (const bigint &c) const
bool	operator== (const bigint &c) const
bool	operator!= (const bigint &c) const
bigint	operator+ (const bigint &a) const
bigint	operator* (const bigint &a) const
bigint	operator/ (const bigint &a) const
bigint	operator% (const bigint &a) const
bigint	operator/= (const bigint &a)
bigint	operator*= (const bigint &a)
bigint &	operator+= (const bigint &a)
bigint &	operator-= (const bigint &a)
bigint &	operator<<= (uint32_t i)
bigint &	operator>>= (uint32_t i)
bigint	operator- (const bigint &a) const
bigint	operator++ (int)
bigint &	operator++ ()
bigint	operator-- (int)
bigint &	operator-- ()
	operator fc::string () const
	operator std::vector< char > () const
BIGNUM *	dup () const
BIGNUM *	get () const

Static Public Member Functions
static bigint	random (uint32_t bits, int t, int)

Detailed Description

Definition at line 10 of file bigint.hpp.

Constructor & Destructor Documentation

bigint() [1/7]

fc::bigint::bigint

(

const std::vector< char > &

bige

)

Definition at line 15 of file bigint.cpp.

                                                  {
        n = BN_bin2bn( (const unsigned char*)bige.data(), bige.size(), NULL );
        FC_ASSERT( n != nullptr );
      }

bigint() [2/7]

fc::bigint::bigint	(	const char *	bige,
		uint32_t	l )

Definition at line 11 of file bigint.cpp.

                                                   {
        n = BN_bin2bn( (const unsigned char*)bige, l, NULL );
        FC_ASSERT( n != nullptr );
      }

bigint() [3/7]

fc::bigint::bigint

(

uint64_t

value

)

Definition at line 32 of file bigint.cpp.

      {
        uint64_t big_endian_value = bswap_64(value);
        n = BN_bin2bn((const unsigned char*)&big_endian_value, sizeof(big_endian_value), NULL);
      }

bigint() [4/7]

fc::bigint::bigint

(

)

Definition at line 23 of file bigint.cpp.

      :n(BN_new()) 
      { }

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bigint() [5/7]

fc::bigint::bigint

(

const bigint &

c

)

Definition at line 38 of file bigint.cpp.

                                      {
        n = BN_dup( c.n );
      }

bigint() [6/7]

fc::bigint::bigint

(

bigint &&

c

)

Definition at line 42 of file bigint.cpp.

                                 {
        n = b.n;
        b.n = 0;
      }

bigint() [7/7]

fc::bigint::bigint ( BIGNUM * n )

explicit

Definition at line 19 of file bigint.cpp.

      {
        n = BN_dup(in);
      }

~bigint()

fc::bigint::~bigint

(

)

Definition at line 47 of file bigint.cpp.

                      {
        if(n!=0) BN_free(n);
      }

Member Function Documentation

dup()

BIGNUM * fc::bigint::dup

(

)

const

Definition at line 27 of file bigint.cpp.

      {
        return BN_dup( n );
      }

exp()

bigint fc::bigint::exp

(

const bigint &

c

)

const

Definition at line 180 of file bigint.cpp.

      {
        BN_CTX* ctx = BN_CTX_new();
        bigint tmp;
        BN_exp( tmp.n, n, a.n, ctx );
        BN_CTX_free(ctx);
        return tmp;
      }

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get()

BIGNUM * fc::bigint::get ( ) const

inline

Definition at line 65 of file bigint.hpp.

{ return n; }

is_negative()

bool fc::bigint::is_negative

(

)

const

Definition at line 51 of file bigint.cpp.

{ return BN_is_negative(n); }

log2()

int64_t fc::bigint::log2

(

)

const

Definition at line 62 of file bigint.cpp.

{ return BN_num_bits(n); }

operator bool()

fc::bigint::operator bool ( ) const

explicit

Definition at line 78 of file bigint.cpp.

      {
        return !BN_is_zero( n );
      }

operator fc::string()

fc::bigint::operator fc::string

(

)

const

Definition at line 200 of file bigint.cpp.

                                     {
        return BN_bn2dec(n);
      }

operator std::vector< char >()

fc::bigint::operator std::vector< char >

(

)

const

Definition at line 204 of file bigint.cpp.

                                            {
        std::vector<char> to(BN_num_bytes(n)); 
        BN_bn2bin(n,(unsigned char*)to.data());
        return to;
      }

operator!=()

bool fc::bigint::operator!=

(

const bigint &

c

)

const

Definition at line 75 of file bigint.cpp.

                                                      {
        return BN_cmp( n, c.n ) != 0;
      }

operator%()

bigint fc::bigint::operator%

(

const bigint &

a

)

const

Definition at line 136 of file bigint.cpp.

                                                        {
        BN_CTX* ctx = BN_CTX_new();
        bigint tmp;//(*this);
        BN_mod( tmp.n, n, a.n, ctx );
        BN_CTX_free(ctx);
        return tmp;
      }

operator*()

bigint fc::bigint::operator*

(

const bigint &

a

)

const

Definition at line 122 of file bigint.cpp.

                                                       {
        BN_CTX* ctx = BN_CTX_new();
        bigint tmp(*this);
        BN_mul( tmp.n, n, a.n, ctx );
        BN_CTX_free(ctx);
        return tmp;
      }

operator*=()

bigint fc::bigint::operator*=

(

const bigint &

a

)

Definition at line 152 of file bigint.cpp.

                                                   {
        auto tmp = *this * a;
        *this = std::move(tmp);
        return *this;
      }

operator+()

bigint fc::bigint::operator+

(

const bigint &

a

)

const

Definition at line 103 of file bigint.cpp.

                                                       {
        bigint tmp(*this);
        BN_add( tmp.n, n, a.n );
        return tmp;
      }

operator++() [1/2]

bigint & fc::bigint::operator++

(

)

Definition at line 88 of file bigint.cpp.

      {
        return *this = *this + bigint(1);
      }

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operator++() [2/2]

bigint fc::bigint::operator++

(

int

)

Definition at line 82 of file bigint.cpp.

      {
        bigint tmp = *this;
        *this = *this + bigint(1);
        return tmp;
      }

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operator+=()

bigint & fc::bigint::operator+=

(

const bigint &

a

)

Definition at line 108 of file bigint.cpp.

                                                   {
        bigint tmp(*this);
        BN_add( tmp.n, n, a.n );
        std::swap(*this,tmp);
        return *this;
      }

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operator-()

bigint fc::bigint::operator-

(

const bigint &

a

)

const

Definition at line 175 of file bigint.cpp.

                                                       {
        bigint tmp;
        BN_sub( tmp.n, n, a.n );
        return tmp;
      }

operator--() [1/2]

bigint & fc::bigint::operator--

(

)

Definition at line 98 of file bigint.cpp.

      {
        return *this = *this - bigint(1);
      }

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operator--() [2/2]

bigint fc::bigint::operator--

(

int

)

Definition at line 92 of file bigint.cpp.

      {
        bigint tmp = *this;
        *this = *this - bigint(1);
        return tmp;
      }

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operator-=()

bigint & fc::bigint::operator-=

(

const bigint &

a

)

Definition at line 114 of file bigint.cpp.

                                                   {
        bigint tmp(*this);
        BN_sub( tmp.n, n, a.n );
        std::swap(*this,tmp);
        return *this;
      }

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operator/()

bigint fc::bigint::operator/

(

const bigint &

a

)

const

Definition at line 129 of file bigint.cpp.

                                                        {
        BN_CTX* ctx = BN_CTX_new();
        bigint tmp;//(*this);
        BN_div( tmp.n, NULL, n, a.n, ctx );
        BN_CTX_free(ctx);
        return tmp;
      }

operator/=()

bigint fc::bigint::operator/=

(

const bigint &

a

)

Definition at line 144 of file bigint.cpp.

                                                   {
        BN_CTX* ctx = BN_CTX_new();
        bigint tmp;//*this);
        BN_div( tmp.n, NULL, n, a.n, ctx );
        fc_swap( tmp.n, n );
        BN_CTX_free(ctx);
        return tmp;
      }

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operator<()

bool fc::bigint::operator<

(

const bigint &

c

)

const

Definition at line 63 of file bigint.cpp.

                                                     {
        return BN_cmp( n, c.n ) < 0;
      }

operator<<=()

bigint & fc::bigint::operator<<=

(

uint32_t

i

)

Definition at line 165 of file bigint.cpp.

      {
         bigint tmp;
         FC_ASSERT( tmp.n != nullptr );
         FC_ASSERT( n != nullptr );
         BN_lshift( tmp.n, n, i );
         std::swap(*this,tmp);
         return *this;
      }

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operator=() [1/2]

bigint & fc::bigint::operator=

(

bigint &&

a

)

Definition at line 190 of file bigint.cpp.

                                              {
        fc_swap( a.n, n );
        return *this;
      }

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operator=() [2/2]

bigint & fc::bigint::operator=

(

const bigint &

a

)

Definition at line 194 of file bigint.cpp.

                                                   {
        if( &a == this ) 
          return *this;
        BN_copy( n, a.n );
        return *this;
      }

operator==()

bool fc::bigint::operator==

(

const bigint &

c

)

const

Definition at line 72 of file bigint.cpp.

                                                      {
        return BN_cmp( n, c.n ) == 0;
      }

operator>()

bool fc::bigint::operator>

(

const bigint &

c

)

const

Definition at line 66 of file bigint.cpp.

                                                     {
        return BN_cmp( n, c.n ) > 0;
      }

operator>=()

bool fc::bigint::operator>=

(

const bigint &

c

)

const

Definition at line 69 of file bigint.cpp.

                                                      {
        return BN_cmp( n, c.n ) >= 0;
      }

operator>>=()

bigint & fc::bigint::operator>>=

(

uint32_t

i

)

Definition at line 157 of file bigint.cpp.

      {
         bigint tmp;
         BN_rshift( tmp.n, n, i );
         std::swap(*this,tmp);
         return *this;
      }

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random()

static bigint fc::bigint::random ( uint32_t bits, int t, int  )

static

to_int64()

int64_t fc::bigint::to_int64

(

)

const

Definition at line 53 of file bigint.cpp.

      {
        FC_ASSERT(BN_num_bits(n) <= 63);
        size_t size = BN_num_bytes(n);
        uint64_t abs_value = 0;
        BN_bn2bin(n, (unsigned char*)&abs_value + (sizeof(uint64_t) - size));
        return BN_is_negative(n) ? -(int64_t)bswap_64(abs_value) : bswap_64(abs_value);
      }

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The documentation for this class was generated from the following files:

• libraries/fc/include/fc/crypto/bigint.hpp
• libraries/fc/src/crypto/bigint.cpp