diff options
Diffstat (limited to 'src/lib/math/bigint/big_code.cpp')
| -rw-r--r-- | src/lib/math/bigint/big_code.cpp | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/src/lib/math/bigint/big_code.cpp b/src/lib/math/bigint/big_code.cpp index 3ff31b639..c31221333 100644 --- a/src/lib/math/bigint/big_code.cpp +++ b/src/lib/math/bigint/big_code.cpp @@ -17,7 +17,10 @@ std::string BigInt::to_dec_string() const copy.set_sign(Positive); uint8_t remainder; - std::vector<uint8_t> digits; + secure_vector<uint8_t> digits; + + // (over-)estimate of the number of digits, log2(10) ~= 3.32 + digits.reserve(3.4 * this->bits()); while(copy > 0) { @@ -33,6 +36,9 @@ std::string BigInt::to_dec_string() const std::string s; + if(is_negative()) + s += "-"; + for(auto i = digits.rbegin(); i != digits.rend(); ++i) { s.push_back(*i + '0'); @@ -46,11 +52,17 @@ std::string BigInt::to_dec_string() const std::string BigInt::to_hex_string() const { - const std::vector<uint8_t> bits = BigInt::encode(*this); + std::vector<uint8_t> bits = BigInt::encode(*this); + if(bits.empty()) - return "00"; - else - return hex_encode(bits); + bits.push_back(0); + + std::string hrep; + if(is_negative()) + hrep += "-"; + hrep += "0x"; + hrep += hex_encode(bits); + return hrep; } /* |