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50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
#include "BigIntegerUtils.hh"
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#include "BigUnsignedInABase.hh"
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std::string bigUnsignedToString(const BigUnsigned &x) {
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return std::string(BigUnsignedInABase(x, 10));
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}
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std::string bigIntegerToString(const BigInteger &x) {
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return (x.getSign() == BigInteger::negative)
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? (std::string("-") + bigUnsignedToString(x.getMagnitude()))
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: (bigUnsignedToString(x.getMagnitude()));
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}
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BigUnsigned stringToBigUnsigned(const std::string &s) {
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return BigUnsigned(BigUnsignedInABase(s, 10));
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}
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BigInteger stringToBigInteger(const std::string &s) {
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// Recognize a sign followed by a BigUnsigned.
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return (s[0] == '-') ? BigInteger(stringToBigUnsigned(s.substr(1, s.length() - 1)), BigInteger::negative)
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: (s[0] == '+') ? BigInteger(stringToBigUnsigned(s.substr(1, s.length() - 1)))
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: BigInteger(stringToBigUnsigned(s));
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}
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std::ostream &operator <<(std::ostream &os, const BigUnsigned &x) {
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BigUnsignedInABase::Base base;
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long osFlags = os.flags();
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if (osFlags & os.dec)
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base = 10;
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else if (osFlags & os.hex) {
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base = 16;
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if (osFlags & os.showbase)
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os << "0x";
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} else if (osFlags & os.oct) {
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base = 8;
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if (osFlags & os.showbase)
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os << '0';
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} else
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throw "std::ostream << BigUnsigned: Could not determine the desired base from output-stream flags";
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std::string s = std::string(BigUnsignedInABase(x, base));
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os << s;
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return os;
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}
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std::ostream &operator <<(std::ostream &os, const BigInteger &x) {
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if (x.getSign() == BigInteger::negative)
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os << '-';
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os << x.getMagnitude();
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return os;
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}
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