// 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 1.5 2004/01/19 18:26:04 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 ? 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; } Resource_base *ResourceManager::findResource(const std::string &resname) { // 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) return *i; } return 0; } string ResourceManager::resourceValue(const std::string &resname) { Resource_base *res = findResource(resname); if (res != 0) return res->getString(); return ""; } void ResourceManager::setResourceValue(const std::string &resname, const std::string &value) { Resource_base *res = findResource(resname); if (res != 0) res->setFromString(value.c_str()); } 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