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         add_pack(0, fn, filter);
  29 }
  30
  31 void PackSource::add_pack_io(IO::Seekable &io, const string &fn)
  32 {
  33         add_pack(&io, fn, string());
  34 }
  35
  36 void PackSource::add_pack_io(IO::Seekable &io, const string &fn, const string &filter)
  37 {
  38         add_pack(&io, fn, filter);
  39 }
  40
  41 void PackSource::add_pack(IO::Seekable *io, const string &fn, const string &filter)
  42 {
  43         Pack *pack = 0;
  44         for(list<Pack>::iterator i=packs.begin(); (!pack && i!=packs.end()); ++i)
  45                 if(i->get_filename()==fn || (io && i->get_io()==io))
  46                         pack = &*i;
  47         if(!pack)
  48         {
  49                 packs.push_back(Pack(io, fn));
  50                 pack = &packs.back();
  51                 if(io)
  52                 {
  53                         DataFile::Parser parser(*io, fn);
  54                         Pack::Loader loader(*pack);
  55                         loader.load(parser);
  56                 }
  57                 else
  58                         DataFile::load(*pack, fn);
  59         }
  60
  61         FileMap pack_files;
  62         pack->collect_files(pack_files, filter);
  63         files.insert(pack_files.begin(), pack_files.end());
  64         for(FileMap::const_iterator i=pack_files.begin(); i!=pack_files.end(); ++i)
  65                 i->second->collect_objects(objects);
  66 }
  67
  68 list<PackSource::FileInfo> PackSource::list_files() const
  69 {
  70         list<FileInfo> result;
  71         for(FileMap::const_iterator i=files.begin(); i!=files.end(); ++i)
  72                 result.push_back(i->second->get_info());
  73         return result;
  74 }
  75
  76 bool PackSource::is_loadable(const CollectionItemTypeBase &type, const string &name) const
  77 {
  78         ObjectMap::const_iterator i = objects.find(name);
  79         if(i==objects.end())
  80                 return false;
  81
  82         // If the object has a keyword, it must match that of the type
  83         if(!i->second->get_keyword().empty() && i->second->get_keyword()!=type.get_keyword())
  84                 return false;
  85
  86         return true;
  87 }
  88
  89 CollectionSource::NameList PackSource::get_names(const CollectionItemTypeBase &type) const
  90 {
  91         NameList names;
  92         for(ObjectMap::const_iterator i=objects.begin(); i!=objects.end(); ++i)
  93         {
  94                 if(!i->second->get_keyword().empty())
  95                 {
  96                         if(i->second->get_keyword()!=type.get_keyword())
  97                                 continue;
  98                 }
  99                 else if(!type.match_name(i->first))
 100                         continue;
 101
 102                 names.push_back(i->first);
 103         }
 104
 105         return names;
 106 }
 107
 108 void PackSource::load(Collection &coll, const CollectionItemTypeBase &type, const string &name) const
 109 {
 110         ObjectMap::const_iterator i = objects.find(name);
 111         if(i==objects.end())
 112                 return;
 113
 114         File &file = i->second->get_file();
 115
 116         RefPtr<IO::Base> in = file.open();
 117         Parser parser(*in, file.get_full_name());
 118         if(file.is_collection())
 119         {
 120                 Collection::Loader ldr(coll);
 121                 ldr.load(parser);
 122         }
 123         else
 124                 type.load_item(coll, parser, name);
 125 }
 126
 127 IO::Seekable *PackSource::open(const string &fn) const
 128 {
 129         FileMap::const_iterator i = files.find(fn);
 130         if(i!=files.end())
 131                 return i->second->open().release();
 132
 133         return 0;
 134 }
 135
 136
 137 PackSource::Pack::Pack(IO::Seekable *i, const string &fn):
 138         filename(fn),
 139         io(i),
 140         base_offset(0)
 141 { }
 142
 143 void PackSource::Pack::collect_files(FileMap &fm, const string &filter) const
 144 {
 145         if(filter.empty())
 146         {
 147                 for(list<File>::const_iterator i=files.begin(); i!=files.end(); ++i)
 148                         fm[i->get_filename()] = &*i;
 149         }
 150         else
 151         {
 152                 Regex re(filter);
 153                 for(list<File>::const_iterator i=files.begin(); i!=files.end(); ++i)
 154                         if(re.match(i->get_filename()))
 155                                 fm[i->get_filename()] = &*i;
 156         }
 157 }
 158
 159
 160 PackSource::File::File(const Pack &p, const string &fn):
 161         pack(p),
 162         filename(fn),
 163         offset(0),
 164         length(0),
 165         collection(false)
 166 { }
 167
 168 RefPtr<IO::Seekable> PackSource::File::open() const
 169 {
 170         if(pack.get_io())
 171                 // TODO Performance may be poor without buffering
 172                 return new IO::Slice(*pack.get_io(), pack.get_base_offset()+offset, length);
 173         else
 174         {
 175                 IO::BufferedFile *io_file = new IO::BufferedFile(pack.get_filename());
 176                 IO::Slice *io_slice = new IO::Slice(*io_file, pack.get_base_offset()+offset, length);
 177                 io_slice->signal_deleted.connect(sigc::bind(sigc::ptr_fun(delete_io), io_file));
 178                 return io_slice;
 179         }
 180 }
 181
 182 PackSource::FileInfo PackSource::File::get_info() const
 183 {
 184         FileInfo info;
 185         info.name = filename;
 186         info.size = length;
 187         return info;
 188 }
 189
 190 string PackSource::File::get_full_name() const
 191 {
 192         return format("%s/%s", pack.get_filename(), filename);
 193 }
 194
 195 void PackSource::File::collect_objects(ObjectMap &objs) const
 196 {
 197         for(list<Object>::const_iterator i=objects.begin(); i!=objects.end(); ++i)
 198                 objs[i->get_name()] = &*i;
 199 }
 200
 201
 202 PackSource::Object::Object(File &f, const string &n, const string &k):
 203         file(f),
 204         name(n),
 205         keyword(k)
 206 { }
 207
 208
 209 PackSource::Pack::Loader::Loader(Pack &p):
 210         ObjectLoader<Pack>(p)
 211 {
 212         add("file",        &Loader::file);
 213         add("base_offset", &Pack::base_offset);
 214 }
 215
 216 void PackSource::Pack::Loader::file(const string &fn)
 217 {
 218         obj.files.push_back(File(obj, fn));
 219         load_sub(obj.files.back());
 220 }
 221
 222
 223 PackSource::File::Loader::Loader(File &f):
 224         ObjectLoader<File>(f)
 225 {
 226         add("object", &Loader::object);
 227         add("slice",  &File::offset, &File::length);
 228 }
 229
 230 void PackSource::File::Loader::finish()
 231 {
 232         if(!obj.collection)
 233         {
 234                 PackSource::Object ob(obj, obj.filename, string());
 235                 obj.objects.push_back(ob);
 236         }
 237 }
 238
 239 void PackSource::File::Loader::object(const string &name, const string &kwd)
 240 {
 241         obj.objects.push_back(PackSource::Object(obj, name, kwd));
 242         obj.collection = true;
 243 }
 244
 245 } // namespace DataFile
 246 } // namespace Msp