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tdemultimedia/arts/runtime/artsbuilderloader_impl.cc

286 lines
6.8 KiB

/*
Copyright (C) 2001 Stefan Westerfeld
stefan@space.twc.de
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "artsbuilder.h"
#include "debug.h"
#include <stdlib.h>
#include <fstream>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <unistd.h>
#include <dirent.h>
#include <set>
#include <cstring>
using namespace Arts;
using namespace std;
namespace Arts {
class ArtsBuilderLoader_impl : virtual public ArtsBuilderLoader_skel {
protected:
set<string> sourceDirs;
string lastDataVersion;
vector<TraderEntry> _traderEntries;
vector<ModuleDef> _modules;
public:
Object loadObject(Arts::TraderOffer offer)
{
StructureDesc structureDesc;
vector<string> strseq;
// load file
vector<string> *filenames = offer.getProperty("File");
if(filenames->size() == 1)
{
string& filename = filenames->front();
arts_info("ArtsBuilderLoader: filename = %s", filename.c_str());
ifstream infile(filename.c_str());
string line;
while(getline(infile,line)) strseq.push_back(line);
}
delete filenames;
structureDesc.loadFromList(strseq);
if(structureDesc.name() != offer.interfaceName())
{
arts_warning("failed (name = %s).",structureDesc.name().c_str());
return Object::null();
}
StructureBuilder builder;
builder.addFactory(LocalFactory());
return builder.createObject(structureDesc);
}
vector<string> *listFiles(const string& pathname, const char *extension)
{
vector<string> *result = new vector<string>();
unsigned long extlen = strlen(extension);
DIR *dir = opendir(pathname.c_str());
if(dir != 0)
{
struct dirent *de;
while((de = readdir(dir)) != 0)
{
if(strlen(de->d_name) > extlen &&
strncmp(&de->d_name[strlen(de->d_name)-extlen],
extension,extlen) == 0)
result->push_back(de->d_name);
}
closedir(dir);
}
return result;
}
void collectInterfaces(const InterfaceDef& interface,
map<string, bool>& implemented)
{
if(!implemented[interface.name])
{
implemented[interface.name] = true;
vector<string>::const_iterator ii;
for(ii = interface.inheritedInterfaces.begin();
ii != interface.inheritedInterfaces.end(); ii++)
{
InterfaceDef id;
id = Dispatcher::the()->interfaceRepo().queryInterface(*ii);
collectInterfaces(id, implemented);
}
}
}
string getInterfacesList(const InterfaceDef& interface)
{
map<string, bool> implemented;
map<string, bool>::iterator ii;
string result;
collectInterfaces(interface, implemented);
for(ii = implemented.begin(); ii != implemented.end(); ii++)
result += ii->first + ",";
result += "Arts::Object";
return result;
}
void scanArtsFile(const string& filename)
{
StructureDesc structureDesc;
vector<string> strseq;
// load file
{
ifstream infile(filename.c_str());
string line;
int inmodule = 0;
while(getline(infile,line))
{
/*
* TODO - maybe there is a cleaner way?
*
* the following six lines are a bit hackish code to skip
* the module sections of the structures
*
* the problem with the module sections is this:
* we can't be sure that every module is known to the type
* system before we registered them with the type system,
* but as this code should be able to initially register .arts
* files with the type system, we can't rely that it has been
* done already (if we could, what would be the point of
* running this?)
*/
if(strncmp(line.c_str(), "module=", 7) == 0)
inmodule = 1;
if(strncmp(line.c_str(), "{", 1) == 0 && inmodule == 1)
inmodule = 2;
if(strncmp(line.c_str(), "}", 1) == 0 && inmodule == 2)
inmodule = 0;
if(inmodule == 0)
strseq.push_back(line);
}
}
structureDesc.loadFromList(strseq);
string name = structureDesc.name();
arts_debug("%s [%s]\n",filename.c_str(),name.c_str());
/* add to _modules */
StructureBuilder builder;
ModuleDef md = builder.createTypeInfo(structureDesc);
_modules.push_back(md);
arts_assert(md.moduleName == name);
arts_assert(!md.interfaces.empty());
const InterfaceDef& id = md.interfaces.front();
/* add to _traderEntries */
TraderEntry entry;
entry.interfaceName = name;
entry.lines.push_back("Buildable=true");
entry.lines.push_back("Interface="+getInterfacesList(id));
entry.lines.push_back("Language=aRts");
entry.lines.push_back("File="+filename);
_traderEntries.push_back(entry);
/*
* TODO: more entries like
* Author="Stefan Westerfeld <stefan@space.twc.de>"
* URL="http://www.arts-project.org"
* License=...
*/
}
void rescan()
{
lastDataVersion = dataVersion();
_traderEntries.clear();
_modules.clear();
set<string>::iterator si;
for(si = sourceDirs.begin(); si != sourceDirs.end(); si++)
{
vector<string> *files = listFiles(*si, ".arts");
vector<string>::iterator i;
for(i = files->begin(); i != files->end(); i++)
scanArtsFile(*si + "/" +*i);
delete files;
}
}
string dataVersion()
{
/*
* change this string if you change the loading algorithm to force
* rescanning even with the same data
*/
string result = "ArtsBuilderLoader:1.1:";
bool first = true;
set<string>::iterator i;
for(i = sourceDirs.begin(); i != sourceDirs.end(); i++)
{
const string& filename = *i;
if(!first) result += ",";
first = false;
struct stat st;
if( stat(filename.c_str(), &st) == 0 )
{
char mtime[32];
sprintf(mtime,"[%ld]",st.st_mtime);
result += filename + mtime;
}
else
result += filename + "[-1]";
}
return result;
}
vector<TraderEntry> *traderEntries()
{
if(dataVersion() != lastDataVersion)
rescan();
return new vector<TraderEntry>(_traderEntries);
}
vector<ModuleDef> *modules()
{
if(dataVersion() != lastDataVersion)
rescan();
return new vector<ModuleDef>(_modules);
}
ArtsBuilderLoader_impl()
{
sourceDirs.insert(EXAMPLES_DIR);
const char *home = getenv("HOME");
if(home) sourceDirs.insert(home+string("/arts/structures"));
}
};
REGISTER_IMPLEMENTATION(ArtsBuilderLoader_impl);
}