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#include "big_integer.h"
#include <util/generic/yexception.h>
#include <util/generic/scope.h>
#include <util/stream/output.h>
#include <openssl/bn.h>
using namespace NOpenSsl;
TBigInteger::~TBigInteger() noexcept {
BN_free(Impl_);
}
TBigInteger TBigInteger::FromULong(ui64 value) {
TBigInteger result(BN_new());
Y_ENSURE(result.Impl(), "BN_new() failed");
Y_ENSURE(BN_set_word(result.Impl(), value) == 1, "BN_set_word() failed");
return result;
}
TBigInteger TBigInteger::FromRegion(const void* ptr, size_t len) {
auto result = BN_bin2bn((ui8*)(ptr), len, nullptr);
Y_ENSURE(result, "BN_bin2bn() failed");
return result;
}
int TBigInteger::Compare(const TBigInteger& a, const TBigInteger& b) noexcept {
return BN_cmp(a.Impl(), b.Impl());
}
size_t TBigInteger::NumBytes() const noexcept {
return BN_num_bytes(Impl_);
}
size_t TBigInteger::ToRegion(void* to) const noexcept {
const auto ret = BN_bn2bin(Impl_, (unsigned char*)to);
Y_VERIFY(ret >= 0, "it happens");
return ret;
}
TString TBigInteger::ToDecimalString() const {
auto res = BN_bn2dec(Impl_);
Y_DEFER {
OPENSSL_free(res);
};
return res;
}
template <>
void Out<TBigInteger>(IOutputStream& out, const TBigInteger& bi) {
out << bi.ToDecimalString();
}
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