Fix build broken at ac8fda05418b on windows
[pdfium.git] / third_party / bigint / BigIntegerUtils.cc
1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code by Matt McCutchen, see the LICENSE file.
6
7 #include "BigIntegerUtils.hh"
8 #include "BigUnsignedInABase.hh"
9
10 std::string bigUnsignedToString(const BigUnsigned &x) {
11         return std::string(BigUnsignedInABase(x, 10));
12 }
13
14 std::string bigIntegerToString(const BigInteger &x) {
15         return (x.getSign() == BigInteger::negative)
16                 ? (std::string("-") + bigUnsignedToString(x.getMagnitude()))
17                 : (bigUnsignedToString(x.getMagnitude()));
18 }
19
20 BigUnsigned stringToBigUnsigned(const std::string &s) {
21         return BigUnsigned(BigUnsignedInABase(s, 10));
22 }
23
24 BigInteger stringToBigInteger(const std::string &s) {
25         // Recognize a sign followed by a BigUnsigned.
26         return (s[0] == '-') ? BigInteger(stringToBigUnsigned(s.substr(1, s.length() - 1)), BigInteger::negative)
27                 : (s[0] == '+') ? BigInteger(stringToBigUnsigned(s.substr(1, s.length() - 1)))
28                 : BigInteger(stringToBigUnsigned(s));
29 }
30
31 std::ostream &operator <<(std::ostream &os, const BigUnsigned &x) {
32         BigUnsignedInABase::Base base;
33         long osFlags = os.flags();
34         if (osFlags & os.dec)
35                 base = 10;
36         else if (osFlags & os.hex) {
37                 base = 16;
38                 if (osFlags & os.showbase)
39                         os << "0x";
40         } else if (osFlags & os.oct) {
41                 base = 8;
42                 if (osFlags & os.showbase)
43                         os << '0';
44         } else
45         abort();
46
47         std::string s = std::string(BigUnsignedInABase(x, base));
48         os << s;
49         return os;
50 }
51
52 std::ostream &operator <<(std::ostream &os, const BigInteger &x) {
53         if (x.getSign() == BigInteger::negative)
54                 os << '-';
55         os << x.getMagnitude();
56         return os;
57 }