eic-opticks/sysrap/SBase36.cc

0001 /*
0002  * Copyright (c) 2019 Opticks Team. All Rights Reserved.
0003  *
0004  * This file is part of Opticks
0005  * (see https://bitbucket.org/simoncblyth/opticks).
0006  *
0007  * Licensed under the Apache License, Version 2.0 (the "License");
0008  * you may not use this file except in compliance with the License.
0009  * You may obtain a copy of the License at
0010  *
0011  *   http://www.apache.org/licenses/LICENSE-2.0
0012  *
0013  * Unless required by applicable law or agreed to in writing, software
0014  * distributed under the License is distributed on an "AS IS" BASIS,
0015  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0016  * See the License for the specific language governing permissions and
0017  * limitations under the License.
0018  */
0019
0020 #include <sstream>
0021 #include "SBase36.hh"
0022
0023 const char* SBase36::LABELS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" ;
0024
0025 std::string SBase36::operator()( unsigned int val ) const
0026 {
0027     //  https://en.wikipedia.org/wiki/Base36
0028     std::stringstream ss ;
0029     do { ss << LABELS[val % 36] ; } while (val /= 36);
0030     std::string r = ss.str();
0031     std::string rr(r.rbegin(), r.rend());
0032     return rr ;
0033 }
0034
0035
0036