eic-opticks/sysrap/SId.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 <cstring>
0022 #include <cassert>
0023
0024 #include "SId.hh"
0025
0026 SId::SId(const char* identifiers_ )
0027    :
0028    identifiers(strdup(identifiers_)),
0029    len(strlen(identifiers)),
0030    idx(-1),
0031    cycle(0)
0032 {
0033 }
0034
0035 void SId::reset()
0036 {
0037     idx = -1 ;
0038     cycle = 0 ;
0039 }
0040
0041 const char* SId::get(bool reset_)
0042 {
0043     if(reset_) reset();
0044
0045     if( idx + 1 == len )
0046     {
0047         cycle += 1 ;
0048         idx = -1 ;
0049     }
0050
0051     idx += 1 ;
0052     assert( idx < len ) ;
0053
0054     std::stringstream ss ;
0055     ss << identifiers[idx] ;
0056     if( cycle > 0 ) ss << cycle ;
0057
0058     std::string s = ss.str() ;
0059
0060     return strdup(s.c_str()) ;
0061 }
0062
0063