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05780f4b MM |
1 | #include "BigIntegerUtils.hh" |
2 | #include "BigUnsignedInABase.hh" | |
3 | ||
0afe80d5 | 4 | std::string bigUnsignedToString(const BigUnsigned &x) { |
05780f4b MM |
5 | return std::string(BigUnsignedInABase(x, 10)); |
6 | } | |
7 | ||
0afe80d5 | 8 | std::string bigIntegerToString(const BigInteger &x) { |
3e132790 | 9 | return (x.getSign() == BigInteger::negative) |
0afe80d5 MM |
10 | ? (std::string("-") + bigUnsignedToString(x.getMagnitude())) |
11 | : (bigUnsignedToString(x.getMagnitude())); | |
05780f4b MM |
12 | } |
13 | ||
0afe80d5 | 14 | BigUnsigned stringToBigUnsigned(const std::string &s) { |
05780f4b MM |
15 | return BigUnsigned(BigUnsignedInABase(s, 10)); |
16 | } | |
17 | ||
0afe80d5 MM |
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)); | |
05780f4b MM |
23 | } |
24 | ||
05780f4b MM |
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 | } | |
0afe80d5 | 44 | |
05780f4b MM |
45 | std::ostream &operator <<(std::ostream &os, const BigInteger &x) { |
46 | if (x.getSign() == BigInteger::negative) | |
47 | os << '-'; | |
3e132790 | 48 | os << x.getMagnitude(); |
05780f4b MM |
49 | return os; |
50 | } |