source/libr2c2/block.cpp

   1 #include <algorithm>
   2 #include <msp/time/units.h>
   3 #include "block.h"
   4 #include "driver.h"
   5 #include "layout.h"
   6 #include "route.h"
   7 #include "trackcircuit.h"
   8 #include "trackiter.h"
   9 #include "tracktype.h"
  10
  11 using namespace std;
  12 using namespace Msp;
  13
  14 namespace R2C2 {
  15
  16 Block::Block(Layout &l, Track &start):
  17         TrackChain(l),
  18         id(0),
  19         sensor_addr(start.get_sensor_address()),
  20         turnout_addr(start.get_turnout_address()),
  21         conflict(false),
  22         sensor(0),
  23         train(0)
  24 {
  25         add_track(start);
  26
  27         if(start.get_type().is_turnout())
  28         {
  29                 unsigned nls = start.get_n_link_slots();
  30                 for(unsigned i=0; i<nls; ++i)
  31                         endpoints.push_back(Endpoint(&start, i));
  32         }
  33         else
  34         {
  35                 unsigned nls = start.get_n_link_slots();
  36                 for(unsigned i=0; i<nls; ++i)
  37                 {
  38                         TrackIter iter = TrackIter(&start, i).flip();
  39                         for(; (iter && check_validity(*iter)==VALID); iter=iter.next())
  40                                 add_track(*iter);
  41                         if((iter = iter.flip()))
  42                                 endpoints.push_back(Endpoint(iter.track(), iter.entry()));
  43                 }
  44         }
  45
  46         determine_id();
  47
  48         const set<Block *> &blocks = layout.get_all<Block>();
  49         for(set<Block *>::const_iterator i=blocks.begin(); (!conflict && i!=blocks.end()); ++i)
  50                 conflict = (id==(*i)->get_id());
  51
  52         if(!conflict && sensor_addr)
  53                 sensor = new TrackCircuit(layout, *this);
  54
  55         layout.add(*this);
  56 }
  57
  58 Block::~Block()
  59 {
  60         set<Track *> trks = tracks;
  61         tracks.clear();
  62         for(set<Track *>::iterator i=trks.begin(); i!=trks.end(); ++i)
  63                 (*i)->set_block(0);
  64
  65         for(vector<Endpoint>::iterator i=endpoints.begin(); i!=endpoints.end(); ++i)
  66                 if(Block *blk = i->link)
  67                 {
  68                         i->link = 0;
  69                         blk->break_link(*this);
  70                 }
  71
  72         layout.remove(*this);
  73
  74         delete sensor;
  75 }
  76
  77 void Block::on_track_added(Track &track)
  78 {
  79         track.set_block(this);
  80 }
  81
  82 TrackChain::Validity Block::check_validity(Track &track) const
  83 {
  84         if(track.get_sensor_address()!=sensor_addr || track.get_turnout_address()!=turnout_addr)
  85                 return INCOMPATIBLE;
  86
  87         return TrackChain::check_validity(track);
  88 }
  89
  90 const Block::Endpoint &Block::get_endpoint(unsigned i) const
  91 {
  92         if(i>=endpoints.size())
  93                 throw out_of_range("Block::get_endpoint");
  94
  95         return endpoints[i];
  96 }
  97
  98 int Block::get_endpoint_by_link(Block &other) const
  99 {
 100         for(unsigned i=0; i<endpoints.size(); ++i)
 101                 if(endpoints[i].link==&other)
 102                         return i;
 103
 104         return -1;
 105 }
 106
 107 float Block::get_path_length(unsigned entry, const Route *route) const
 108 {
 109         if(entry>=endpoints.size())
 110                 throw out_of_range("Block::get_path_length");
 111
 112         TrackIter t_iter = endpoints[entry].track_iter();
 113
 114         float result = 0;
 115         while(t_iter && has_track(*t_iter))
 116         {
 117                 unsigned path = (route ? route->get_path(*t_iter) : t_iter->get_active_path());
 118                 result += t_iter->get_type().get_path_length(path);
 119
 120                 t_iter = t_iter.next(path);
 121         }
 122
 123         return result;
 124 }
 125
 126 void Block::check_link(Block &other)
 127 {
 128         for(vector<Endpoint>::iterator i=endpoints.begin(); i!=endpoints.end(); ++i)
 129         {
 130                 if(i->link)
 131                         continue;
 132
 133                 for(vector<Endpoint>::iterator j=other.endpoints.begin(); j!=other.endpoints.end(); ++j)
 134                         if(j->track==i->track->get_link(i->track_ep) && j->track->get_link(j->track_ep)==i->track && !j->link)
 135                         {
 136                                 i->link = &other;
 137                                 j->link = this;
 138
 139                                 determine_id();
 140                                 other.determine_id();
 141                         }
 142         }
 143 }
 144
 145 void Block::break_link(Block &other)
 146 {
 147         for(vector<Endpoint>::iterator i=endpoints.begin(); i!=endpoints.end(); ++i)
 148                 if(i->link==&other)
 149                 {
 150                         i->link = 0;
 151                         other.break_link(*this);
 152                         determine_id();
 153                 }
 154 }
 155
 156 Block *Block::get_link(unsigned epi) const
 157 {
 158         if(epi>=endpoints.size())
 159                 throw out_of_range("Block::get_link");
 160         return endpoints[epi].link;
 161 }
 162
 163 bool Block::reserve(Train *t)
 164 {
 165         if(!t || !train)
 166         {
 167                 train = t;
 168                 signal_reserved.emit(train);
 169                 return true;
 170         }
 171         else
 172                 return false;
 173 }
 174
 175 void Block::determine_id()
 176 {
 177         if(sensor_addr)
 178                 id = 0x1000|sensor_addr;
 179         else if(turnout_addr)
 180                 id = 0x2000|turnout_addr;
 181         else if(endpoints.size()==2)
 182         {
 183                 unsigned id1 = endpoints[0].link ? endpoints[0].link->get_id() : 1;
 184                 unsigned id2 = endpoints[1].link ? endpoints[1].link->get_id() : 1;
 185                 if(id2<id1)
 186                         swap(id1, id2);
 187                 id = (id1<<16)|id2;
 188         }
 189         else if(endpoints.size()==1)
 190         {
 191                 unsigned id1 = endpoints[0].link ? endpoints[0].link->get_id() : 1;
 192                 id = 0x10000 | id1;
 193         }
 194 }
 195
 196
 197 Block::Endpoint::Endpoint(Track *t, unsigned e):
 198         track(t),
 199         track_ep(e),
 200         link(0)
 201 { }
 202
 203 TrackIter Block::Endpoint::track_iter() const
 204 {
 205         return TrackIter(track, track_ep);
 206 }
 207
 208 } // namespace R2C2