| 1 | #include "BigIntegerUtils.hh" |
| 2 | #include "BigUnsignedInABase.hh" |
| 3 | |
| 4 | std::string bigUnsignedToString(const BigUnsigned &x) { |
| 5 | return std::string(BigUnsignedInABase(x, 10)); |
| 6 | } |
| 7 | |
| 8 | std::string bigIntegerToString(const BigInteger &x) { |
| 9 | return (x.getSign() == BigInteger::negative) |
| 10 | ? (std::string("-") + bigUnsignedToString(x.getMagnitude())) |
| 11 | : (bigUnsignedToString(x.getMagnitude())); |
| 12 | } |
| 13 | |
| 14 | BigUnsigned stringToBigUnsigned(const std::string &s) { |
| 15 | return BigUnsigned(BigUnsignedInABase(s, 10)); |
| 16 | } |
| 17 | |
| 18 | BigInteger stringToBigInteger(const std::string &s) { |
| 19 | // Recognize a sign followed by a BigUnsigned. |
| 20 | return (s[0] == '-') ? BigInteger(stringToBigUnsigned(s.substr(1, s.length() - 1)), BigInteger::negative) |
| 21 | : (s[0] == '+') ? BigInteger(stringToBigUnsigned(s.substr(1, s.length() - 1))) |
| 22 | : BigInteger(stringToBigUnsigned(s)); |
| 23 | } |
| 24 | |
| 25 | std::ostream &operator <<(std::ostream &os, const BigUnsigned &x) { |
| 26 | BigUnsignedInABase::Base base; |
| 27 | long osFlags = os.flags(); |
| 28 | if (osFlags & os.dec) |
| 29 | base = 10; |
| 30 | else if (osFlags & os.hex) { |
| 31 | base = 16; |
| 32 | if (osFlags & os.showbase) |
| 33 | os << "0x"; |
| 34 | } else if (osFlags & os.oct) { |
| 35 | base = 8; |
| 36 | if (osFlags & os.showbase) |
| 37 | os << '0'; |
| 38 | } else |
| 39 | throw "std::ostream << BigUnsigned: Could not determine the desired base from output-stream flags"; |
| 40 | std::string s = std::string(BigUnsignedInABase(x, base)); |
| 41 | os << s; |
| 42 | return os; |
| 43 | } |
| 44 | |
| 45 | std::ostream &operator <<(std::ostream &os, const BigInteger &x) { |
| 46 | if (x.getSign() == BigInteger::negative) |
| 47 | os << '-'; |
| 48 | os << x.getMagnitude(); |
| 49 | return os; |
| 50 | } |