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Viewing changes to arts/runtime/artsbuilderloader_impl.cc

  • Committer: Bazaar Package Importer
  • Author(s): Martin Schulze
  • Date: 2003-01-22 15:00:51 UTC
  • Revision ID: james.westby@ubuntu.com-20030122150051-uihwkdoxf15mi1tn
Tags: upstream-2.2.2
Import upstream version 2.2.2

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arts/runtime/artsbuilderloader_impl.cc
 
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    /*
 
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    Copyright (C) 2001 Stefan Westerfeld
 
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                       stefan@space.twc.de
 
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    This library is free software; you can redistribute it and/or
 
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    modify it under the terms of the GNU Library General Public
 
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    License as published by the Free Software Foundation; either
 
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    version 2 of the License, or (at your option) any later version.
 
10
  
 
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    This library is distributed in the hope that it will be useful,
 
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 
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    Library General Public License for more details.
 
15
   
 
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    You should have received a copy of the GNU Library General Public License
 
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    along with this library; see the file COPYING.LIB.  If not, write to
 
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    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 
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    Boston, MA 02111-1307, USA.
 
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    */
 
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#include "artsbuilder.h"
 
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#include "debug.h"
 
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#include <fstream.h>
 
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#include <sys/types.h>
 
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#include <sys/stat.h>
 
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#include <stdio.h>
 
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#include <unistd.h>
 
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#include <dirent.h>
 
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#include <set>
 
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using namespace Arts;
 
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using namespace std;
 
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namespace Arts {
 
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class ArtsBuilderLoader_impl : virtual public ArtsBuilderLoader_skel {
 
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protected:
 
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        set<string> sourceDirs;
 
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        string lastDataVersion;
 
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        vector<TraderEntry> _traderEntries;
 
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        vector<ModuleDef> _modules;
 
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public:
 
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        Object loadObject(Arts::TraderOffer offer)
 
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        {
 
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                StructureDesc structureDesc;
 
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                vector<string> strseq;
 
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                // load file
 
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                vector<string> *filenames = offer.getProperty("File");
 
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                if(filenames->size() == 1)
 
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                {
 
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                        string& filename = filenames->front();
 
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                        arts_info("ArtsBuilderLoader: filename = %s", filename.c_str());
 
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                        ifstream infile(filename.c_str());
 
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                        string line;
 
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                        while(getline(infile,line)) strseq.push_back(line);
 
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                }
 
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                delete filenames;
 
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                structureDesc.loadFromList(strseq);
 
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                if(structureDesc.name() != offer.interfaceName())
 
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                {
 
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                        arts_warning("failed (name = %s).",structureDesc.name().c_str());
 
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                        return Object::null();
 
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                }
 
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                StructureBuilder builder;
 
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                builder.addFactory(LocalFactory());
 
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                return builder.createObject(structureDesc);
 
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        }
 
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        vector<string> *listFiles(const string& pathname, const char *extension)
 
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        {
 
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                vector<string> *result = new vector<string>();
 
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                unsigned long extlen = strlen(extension);
 
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                DIR *dir = opendir(pathname.c_str());
 
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                if(dir != 0)
 
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                {
 
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                        struct dirent *de;
 
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                        while((de = readdir(dir)) != 0)
 
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                        {
 
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                                if(strlen(de->d_name) > extlen &&
 
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                                                strncmp(&de->d_name[strlen(de->d_name)-extlen],
 
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                                                        extension,extlen) == 0)
 
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                                        result->push_back(de->d_name);
 
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                        }
 
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                        closedir(dir);
 
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                }
 
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                return result;
 
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        }
 
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        void scanArtsFile(const string& filename)
 
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        {
 
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                StructureDesc structureDesc;
 
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                vector<string> strseq;
 
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                // load file
 
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                {
 
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                        ifstream infile(filename.c_str());
 
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                        string line;
 
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                        int inmodule = 0;
 
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                        while(getline(infile,line))
 
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                        {
 
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                                /*
 
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                                 * TODO - maybe there is a cleaner way?
 
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                                 *
 
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                                 * the following six lines are a bit hackish code to skip
 
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                                 * the module sections of the structures
 
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                                 *
 
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                                 * the problem with the module sections is this:
 
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                                 * we can't be sure that every module is known to the type
 
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                                 * system before we registered them with the type system,
 
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                                 * but as this code should be able to initially register .arts
 
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                                 * files with the type system, we can't rely that it has been
 
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                                 * done already (if we could, what would be the point of
 
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                                 * running this?)
 
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                                 */
 
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                                if(strncmp(line.c_str(), "module=", 7) == 0)
 
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                                        inmodule = 1;
 
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                                if(strncmp(line.c_str(), "{", 1) == 0 && inmodule == 1)
 
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                                        inmodule = 2;
 
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                                if(strncmp(line.c_str(), "}", 1) == 0 && inmodule == 2)
 
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                                        inmodule = 0;
 
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                                if(inmodule == 0)
 
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                                        strseq.push_back(line);
 
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                        }
 
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                }
 
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142
                structureDesc.loadFromList(strseq);
 
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                string name = structureDesc.name();
 
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145
 
 
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                arts_debug("%s [%s]\n",filename.c_str(),name.c_str());
 
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                /* add to _modules */
 
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                StructureBuilder builder;
 
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                ModuleDef md = builder.createTypeInfo(structureDesc);
 
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                _modules.push_back(md);
 
152
 
 
153
                arts_assert(md.moduleName == name);
 
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                /* add to _traderEntries */
 
156
                
 
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                TraderEntry entry;
 
158
                entry.interfaceName = name;
 
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                entry.lines.push_back("Buildable=true");
 
160
                entry.lines.push_back("Interface="+name+",Arts::SynthModule,Arts::Object");
 
161
                entry.lines.push_back("Language=aRts");
 
162
                entry.lines.push_back("File="+filename);
 
163
 
 
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                _traderEntries.push_back(entry);
 
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                /*
 
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                 * TODO: more entries like
 
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                 * Author="Stefan Westerfeld <stefan@space.twc.de>"
 
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                 * URL="http://www.arts-project.org"
 
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                 * License=...
 
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                 */
 
171
        }
 
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173
        void rescan()
 
174
        {
 
175
                lastDataVersion = dataVersion();
 
176
                
 
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                _traderEntries.clear();
 
178
                _modules.clear();
 
179
 
 
180
                set<string>::iterator si;
 
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                for(si = sourceDirs.begin(); si != sourceDirs.end(); si++)
 
182
                {
 
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                        vector<string> *files = listFiles(*si, ".arts");
 
184
                        vector<string>::iterator i;
 
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                        for(i = files->begin(); i != files->end(); i++)
 
186
                                scanArtsFile(*si + "/" +*i);
 
187
                        delete files;
 
188
                }
 
189
        }
 
190
 
 
191
        string dataVersion()
 
192
        {
 
193
                /*
 
194
                 * change this string if you change the loading algorithm to force
 
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                 * rescanning even with the same data
 
196
                 */
 
197
                string result = "ArtsBuilderLoader:1.0:";
 
198
 
 
199
                bool first = true;
 
200
 
 
201
                set<string>::iterator i;
 
202
                for(i = sourceDirs.begin(); i != sourceDirs.end(); i++)
 
203
                {
 
204
                        const string& filename = *i;
 
205
 
 
206
                        struct stat st;
 
207
                        stat(filename.c_str(), &st);
 
208
                
 
209
                        if(!first) result += ",";
 
210
                        first = false;
 
211
 
 
212
                        char mtime[32];
 
213
                        sprintf(mtime,"[%ld]",st.st_mtime);
 
214
                        result += filename + mtime;
 
215
                }
 
216
                return result;
 
217
        }
 
218
 
 
219
        vector<TraderEntry> *traderEntries()
 
220
        {
 
221
                if(dataVersion() != lastDataVersion)
 
222
                        rescan();
 
223
 
 
224
                return new vector<TraderEntry>(_traderEntries);
 
225
        }
 
226
 
 
227
        vector<ModuleDef> *modules()
 
228
        {
 
229
                if(dataVersion() != lastDataVersion)
 
230
                        rescan();
 
231
 
 
232
                return new vector<ModuleDef>(_modules);
 
233
        }
 
234
 
 
235
        ArtsBuilderLoader_impl()
 
236
        {
 
237
                sourceDirs.insert(EXAMPLES_DIR);
 
238
 
 
239
                const char *home = getenv("HOME");
 
240
                if(home) sourceDirs.insert(home+string("/arts/structures"));
 
241
        }
 
242
};
 
243
 
 
244
REGISTER_IMPLEMENTATION(ArtsBuilderLoader_impl);
 
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};