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// Resource.cc
// Copyright (c) 2002 - 2003 Henrik Kinnunen (fluxgen(at)users.sourceforge.net)
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
// $Id: Resource.cc,v 1.3 2003/12/19 17:08:25 fluxgen Exp $
#include "XrmDatabaseHelper.hh"
#include "Resource.hh"
#include <iostream>
#include <cassert>
using namespace std;
namespace FbTk {
ResourceManager::ResourceManager(const char *filename, bool lock_db) :
m_db_lock(0),
m_database(0),
m_filename(filename)
{
ensureXrmIsInitialize();
if (lock_db)
lock();
}
ResourceManager::~ResourceManager() {
if (m_database)
delete m_database;
}
bool ResourceManager::m_init = false;
/**
reloads all resources from resourcefile
@return true on success else false
*/
bool ResourceManager::load(const char *filename) {
m_filename = filename;
// force reload (lock will ensure it exists)
if (m_database) {
delete m_database;
m_database = 0;
}
lock();
if (!m_database) {
unlock();
return false;
}
XrmValue value;
char *value_type;
//get list and go throu all the resources and load them
ResourceList::iterator i = m_resourcelist.begin();
ResourceList::iterator i_end = m_resourcelist.end();
for (; i != i_end; ++i) {
Resource_base *resource = *i;
if (XrmGetResource(**m_database, resource->name().c_str(),
resource->altName().c_str(), &value_type, &value))
resource->setFromString(value.addr);
else {
cerr<<"Failed to read: "<<resource->name()<<endl;
cerr<<"Setting default value"<<endl;
resource->setDefaultValue();
}
}
unlock();
return true;
}
/**
Saves all the resource to a file
@return 0 on success else negative value representing the error
*/
bool ResourceManager::save(const char *filename, const char *mergefilename) {
assert(filename);
// empty database
XrmDatabaseHelper database;
string rc_string;
ResourceList::iterator i = m_resourcelist.begin();
ResourceList::iterator i_end = m_resourcelist.end();
//write all resources to database
for (; i != i_end; ++i) {
Resource_base *resource = *i;
rc_string = resource->name() + string(": ") + resource->getString();
XrmPutLineResource(&*database, rc_string.c_str());
}
if (database==0)
return false;
//check if we want to merge a database
if (mergefilename) {
// force reload of file
m_filename = mergefilename;
if (m_database)
delete m_database;
m_database = 0;
lock();
if (!m_database) {
unlock();
return false;
}
XrmMergeDatabases(*database, &**m_database); // merge databases
XrmPutFileDatabase(**m_database, filename); // save database to file
// don't try to destroy the database (XrmMergeDatabases destroys it)
*database = 0;
unlock();
} else // save database to file
XrmPutFileDatabase(*database, filename);
m_filename = filename;
return true;
}
void ResourceManager::setResourceValue(const std::string &resname, const std::string &value) {
// find resource name
ResourceList::iterator i = m_resourcelist.begin();
ResourceList::iterator i_end = m_resourcelist.end();
for (; i != i_end; ++i) {
if ((*i)->name() == resname ||
(*i)->altName() == resname) {
(*i)->setFromString(value.c_str());
return;
}
}
}
void ResourceManager::ensureXrmIsInitialize() {
if (!m_init) {
XrmInitialize();
m_init = true;
}
}
ResourceManager &ResourceManager::lock() {
++m_db_lock;
// if the lock was zero, then load the database
if ((m_db_lock == 1 || !m_database) &&
m_filename != "") {
m_database = new XrmDatabaseHelper(m_filename.c_str());
// check that the database loaded ok
if (m_database && *m_database == 0) {
// didn't work
delete m_database;
m_database = 0;
}
}
return *this;
}
void ResourceManager::unlock() {
if (--m_db_lock == 0 && m_database) {
delete m_database;
m_database = 0;
}
}
}; // end namespace FbTk
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