source/packsource.cpp

   1 #include <msp/io/slice.h>
   2 #include <msp/strings/format.h>
   3 #include <msp/strings/regex.h>
   4 #include "collection.h"
   5 #include "packsource.h"
   6
   7 using namespace std;
   8
   9 namespace {
  10
  11 void delete_io(Msp::IO::Base *io)
  12 {
  13         delete io;
  14 }
  15
  16 }
  17
  18 namespace Msp {
  19 namespace DataFile {
  20
  21 void PackSource::add_pack_file(const string &fn)
  22 {
  23         add_pack_file(fn, string());
  24 }
  25
  26 void PackSource::add_pack_file(const string &fn, const string &filter)
  27 {
  28         Pack *pack = 0;
  29         for(list<Pack>::iterator i=packs.begin(); (!pack && i!=packs.end()); ++i)
  30                 if(i->get_filename()==fn)
  31                         pack = &*i;
  32         if(!pack)
  33         {
  34                 packs.push_back(Pack(fn));
  35                 pack = &packs.back();
  36                 DataFile::load(*pack, fn);
  37         }
  38
  39         FileMap pack_files;
  40         pack->collect_files(pack_files, filter);
  41         files.insert(pack_files.begin(), pack_files.end());
  42         for(FileMap::const_iterator i=pack_files.begin(); i!=pack_files.end(); ++i)
  43                 i->second->collect_objects(objects);
  44 }
  45
  46 bool PackSource::is_loadable(const CollectionItemTypeBase &type, const string &name) const
  47 {
  48         ObjectMap::const_iterator i = objects.find(name);
  49         if(i==objects.end())
  50                 return false;
  51
  52         // If the object has a keyword, it must match that of the type
  53         if(!i->second->get_keyword().empty() && i->second->get_keyword()!=type.get_keyword())
  54                 return false;
  55
  56         return true;
  57 }
  58
  59 CollectionSource::NameList PackSource::get_names(const CollectionItemTypeBase &type) const
  60 {
  61         NameList names;
  62         for(ObjectMap::const_iterator i=objects.begin(); i!=objects.end(); ++i)
  63         {
  64                 if(!i->second->get_keyword().empty())
  65                 {
  66                         if(i->second->get_keyword()!=type.get_keyword())
  67                                 continue;
  68                 }
  69                 else if(!type.match_name(i->first))
  70                         continue;
  71
  72                 names.push_back(i->first);
  73         }
  74
  75         return names;
  76 }
  77
  78 void PackSource::load(Collection &coll, const CollectionItemTypeBase &type, const string &name) const
  79 {
  80         ObjectMap::const_iterator i = objects.find(name);
  81         if(i==objects.end())
  82                 return;
  83
  84         File &file = i->second->get_file();
  85         if(file.is_loaded())
  86                 return;
  87         file.set_loaded();
  88
  89         RefPtr<IO::Base> in = file.open();
  90         Parser parser(*in, file.get_full_name());
  91         if(file.is_collection())
  92         {
  93                 Collection::Loader ldr(coll);
  94                 ldr.load(parser);
  95         }
  96         else
  97                 type.load_item(coll, parser, name);
  98 }
  99
 100 IO::Seekable *PackSource::open(const string &fn) const
 101 {
 102         FileMap::const_iterator i = files.find(fn);
 103         if(i!=files.end())
 104                 return i->second->open().release();
 105
 106         return 0;
 107 }
 108
 109
 110 PackSource::Pack::Pack(const string &fn):
 111         filename(fn),
 112         base_offset(0)
 113 { }
 114
 115 void PackSource::Pack::collect_files(FileMap &fm, const string &filter) const
 116 {
 117         if(filter.empty())
 118         {
 119                 for(list<File>::const_iterator i=files.begin(); i!=files.end(); ++i)
 120                         fm[i->get_filename()] = &*i;
 121         }
 122         else
 123         {
 124                 Regex re(filter);
 125                 for(list<File>::const_iterator i=files.begin(); i!=files.end(); ++i)
 126                         if(re.match(i->get_filename()))
 127                                 fm[i->get_filename()] = &*i;
 128         }
 129 }
 130
 131
 132 PackSource::File::File(const Pack &p, const string &fn):
 133         pack(p),
 134         filename(fn),
 135         offset(0),
 136         length(0),
 137         collection(false),
 138         loaded(false)
 139 { }
 140
 141 RefPtr<IO::Seekable> PackSource::File::open() const
 142 {
 143         IO::BufferedFile *io_file = new IO::BufferedFile(pack.get_filename());
 144         IO::Slice *io_slice = new IO::Slice(*io_file, pack.get_base_offset()+offset, length);
 145         io_slice->signal_deleted.connect(sigc::bind(sigc::ptr_fun(delete_io), io_file));
 146         return io_slice;
 147 }
 148
 149 string PackSource::File::get_full_name() const
 150 {
 151         return format("%s/%s", pack.get_filename(), filename);
 152 }
 153
 154 void PackSource::File::set_loaded()
 155 {
 156         loaded = true;
 157 }
 158
 159 void PackSource::File::collect_objects(ObjectMap &objs) const
 160 {
 161         for(list<Object>::const_iterator i=objects.begin(); i!=objects.end(); ++i)
 162                 objs[i->get_name()] = &*i;
 163 }
 164
 165
 166 PackSource::Object::Object(File &f, const string &n, const string &k):
 167         file(f),
 168         name(n),
 169         keyword(k)
 170 { }
 171
 172
 173 PackSource::Pack::Loader::Loader(Pack &p):
 174         ObjectLoader<Pack>(p)
 175 {
 176         add("file",        &Loader::file);
 177         add("base_offset", &Pack::base_offset);
 178 }
 179
 180 void PackSource::Pack::Loader::file(const string &fn)
 181 {
 182         obj.files.push_back(File(obj, fn));
 183         load_sub(obj.files.back());
 184 }
 185
 186
 187 PackSource::File::Loader::Loader(File &f):
 188         ObjectLoader<File>(f)
 189 {
 190         add("object", &Loader::object);
 191         add("slice",  &File::offset, &File::length);
 192 }
 193
 194 void PackSource::File::Loader::finish()
 195 {
 196         if(!obj.collection)
 197         {
 198                 PackSource::Object ob(obj, obj.filename, string());
 199                 obj.objects.push_back(ob);
 200         }
 201 }
 202
 203 void PackSource::File::Loader::object(const string &name, const string &kwd)
 204 {
 205         obj.objects.push_back(PackSource::Object(obj, name, kwd));
 206         obj.collection = true;
 207 }
 208
 209 } // namespace DataFile
 210 } // namespace Msp