84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
#include <fc/bigint.hpp>
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#include <fc/utility.hpp>
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#include <openssl/bn.h>
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namespace fc {
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bigint::bigint( const char* bige, uint32_t l ) {
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n = BN_bin2bn( (const unsigned char*)bige, l, NULL );
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}
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bigint::bigint( unsigned long i )
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:n(BN_new()) {
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BN_set_word( n, i );
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}
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bigint::bigint( const bigint& c ) {
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n = BN_dup( c.n );
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}
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bigint::bigint( bigint&& b ) {
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n = b.n;
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b.n = 0;
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}
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bigint::~bigint() {
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if(n!=0) BN_free(n);
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}
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bool bigint::is_negative()const { return BN_is_negative(n); }
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int64_t bigint::to_int64()const { return BN_get_word(n); }
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int64_t bigint::log2()const { return BN_num_bits(n); }
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bool bigint::operator < ( const bigint& c )const {
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return BN_cmp( n, c.n ) < 0;
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}
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bool bigint::operator > ( const bigint& c )const {
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return BN_cmp( n, c.n ) > 0;
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}
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bool bigint::operator >= ( const bigint& c )const {
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return BN_cmp( n, c.n ) >= 0;
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}
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bool bigint::operator == ( const bigint& c )const {
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return BN_cmp( n, c.n ) == 0;
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}
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bigint bigint::operator + ( const bigint& a )const {
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bigint tmp(*this);
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BN_add( tmp.n, n, a.n );
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return tmp;
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}
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bigint bigint::operator * ( const bigint& a )const {
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BN_CTX* ctx = BN_CTX_new();
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bigint tmp(*this);
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BN_mul( tmp.n, n, a.n, ctx );
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BN_CTX_free(ctx);
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return tmp;
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}
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bigint bigint::operator / ( const bigint& a ) const {
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BN_CTX* ctx = BN_CTX_new();
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bigint tmp(*this);
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BN_div( tmp.n, NULL, n, a.n, ctx );
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BN_CTX_free(ctx);
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return tmp;
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}
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bigint bigint::operator - ( const bigint& a )const {
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bigint tmp(*this);
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BN_sub( tmp.n, n, a.n );
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return tmp;
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}
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bigint& bigint::operator = ( bigint&& a ) {
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fc_swap( a.n, n );
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return *this;
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}
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bigint& bigint::operator = ( const bigint& a ) {
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if( &a == this )
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return *this;
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BN_copy( n, a.n );
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return *this;
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}
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bigint::operator fc::string()const {
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return BN_bn2dec(n);
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}
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} // namespace fc
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