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57 lines
1.6 KiB
57 lines
1.6 KiB
// Copyright 2014 PDFium Authors. All rights reserved. |
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// Use of this source code is governed by a BSD-style license that can be |
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// found in the LICENSE file. |
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// Original code by Matt McCutchen, see the LICENSE file. |
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#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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abort(); |
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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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