mirror of https://github.com/aria2/aria2
92 lines
2.8 KiB
C++
92 lines
2.8 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#ifndef _D_ALPHA_NUMBER_DECORATOR_H_
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#define _D_ALPHA_NUMBER_DECORATOR_H_
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#include "NumberDecorator.h"
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#include "DlAbortEx.h"
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#include <algorithm>
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namespace aria2 {
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class AlphaNumberDecorator : public NumberDecorator
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{
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private:
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size_t _width;
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char _zero;
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std::string widen(const std::string& s, size_t width)
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{
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std::string t = s;
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std::string zero(1, _zero);
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while(t.size() < width) {
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t.insert(0, zero);
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}
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return t;
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}
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public:
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AlphaNumberDecorator(size_t width, bool uppercase = false):
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_width(width), _zero(uppercase?'A':'a') {}
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virtual ~AlphaNumberDecorator() {}
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virtual std::string decorate(unsigned int number)
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{
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if(number == 0) {
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return widen(std::string(1, _zero), _width);
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}
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int base = 26;
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char u[14]; // because if unsigned int is 64bit, which is the biggest integer for the time being and number is UINT64_MAX, you get "HLHXCZMXSYUMQP"
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size_t index = 0;
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do {
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unsigned int quot = number/base;
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unsigned int rem = number%base;
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u[index++] = _zero+rem;
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number = quot;
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} while(number);
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std::reverse(&u[0], &u[index]);
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return widen(std::string(&u[0], &u[index]), _width);
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}
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};
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} // namespace aria2
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#endif // _D_ALPHA_NUMBER_DECORATOR_H_
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