Eclipse SUMO - Simulation of Urban MObility
IDSupplier.cpp
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1 /****************************************************************************/
2 // Eclipse SUMO, Simulation of Urban MObility; see https://eclipse.org/sumo
3 // Copyright (C) 2001-2019 German Aerospace Center (DLR) and others.
4 // This program and the accompanying materials
5 // are made available under the terms of the Eclipse Public License v2.0
6 // which accompanies this distribution, and is available at
7 // http://www.eclipse.org/legal/epl-v20.html
8 // SPDX-License-Identifier: EPL-2.0
9 /****************************************************************************/
17 // A class that generates enumerated and prefixed string-ids
18 /****************************************************************************/
19 
20 
21 // ===========================================================================
22 // included modules
23 // ===========================================================================
24 #include <config.h>
25 
26 #include <string>
27 #include <sstream>
28 #include "StdDefs.h"
29 #include "IDSupplier.h"
30 
31 
32 // ===========================================================================
33 // method definitions
34 // ===========================================================================
35 IDSupplier::IDSupplier(const std::string& prefix, long long int begin)
36  : myCurrent(begin), myPrefix(prefix) {}
37 
38 
39 
40 IDSupplier::IDSupplier(const std::string& prefix, const std::vector<std::string>& knownIDs)
41  : myCurrent(0), myPrefix(prefix) {
42  for (std::vector<std::string>::const_iterator id_it = knownIDs.begin(); id_it != knownIDs.end(); ++id_it) {
43  avoid(*id_it);
44  }
45 }
46 
47 
49 
50 
51 std::string
53  std::ostringstream strm;
54  strm << myPrefix << myCurrent++;
55  return strm.str();
56 }
57 
58 
59 void
60 IDSupplier::avoid(const std::string& id) {
61  // does it start with prefix?
62  if (id.find(myPrefix) == 0) {
63  long long int number;
64  std::istringstream buf(id.substr(myPrefix.size()));
65  buf >> number;
66  // does it continue with a number?
67  if (!buf.fail()) {
68  myCurrent = MAX2(myCurrent, number + 1);
69  }
70  }
71 }
72 
73 
74 /****************************************************************************/
75 
IDSupplier::avoid
void avoid(const std::string &id)
make sure that the given id is never supplied
Definition: IDSupplier.cpp:60
MAX2
T MAX2(T a, T b)
Definition: StdDefs.h:80
IDSupplier::~IDSupplier
~IDSupplier()
Destructor.
Definition: IDSupplier.cpp:48
IDSupplier::IDSupplier
IDSupplier(const std::string &prefix="", long long int begin=0)
Constructor.
Definition: IDSupplier.cpp:35
IDSupplier.h
IDSupplier::getNext
std::string getNext()
Returns the next id.
Definition: IDSupplier.cpp:52
config.h
StdDefs.h
IDSupplier::myPrefix
std::string myPrefix
The prefix to use.
Definition: IDSupplier.h:64
IDSupplier::myCurrent
long long int myCurrent
The current index.
Definition: IDSupplier.h:61