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