A src/Resource.cc

@@ -0,0 +1,116 @@ 
+// Resource.cc
+// Copyright (c) 2002 Henrik Kinnunen (fluxgen@linuxmail.org)
+//
+// 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.
+
+#include "Resource.hh"
+#include "XrmDatabaseHelper.hh"
+
+#include <iostream>
+#include <cassert>
+
+using namespace std;
+
+bool ResourceManager::m_init = false;
+
+//-------- load -----------
+// loads a resourcefile 
+// returns true on success
+// else false
+//-------------------------
+bool ResourceManager::load(const char *filename) {
+	assert(filename);
+
+	ensureXrmIsInitialize();
+	
+	XrmDatabaseHelper database;
+	database = XrmGetFileDatabase(filename);
+	if (database==0)
+		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(*database, resource->getName().c_str(),
+				resource->getAltName().c_str(), &value_type, &value))			
+			resource->setFromString(value.addr);			
+		else {
+			cerr<<"Faild to read: "<<resource->getName()<<endl;
+			cerr<<"Setting default value"<<endl;
+			resource->setDefaultValue();
+		}
+	}
+
+	return true;
+}
+
+//-------------- save -----------------
+// Saves all the resource to a file
+// returns 0 on success
+// else negative value representing
+// the error
+//-------------------------------------
+bool ResourceManager::save(const char *filename, const char *mergefilename) {
+	assert(filename);
+	
+	ensureXrmIsInitialize();
+
+	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->getName() + string(": ") + resource->getString();
+		XrmPutLineResource(&*database, rc_string.c_str());
+	}
+
+	if (database==0)
+		return false;
+	
+	//check if we want to merge a database
+	if (mergefilename) {
+		XrmDatabaseHelper olddatabase(mergefilename);
+		if (olddatabase == 0)
+			return false;
+		
+		XrmMergeDatabases(*database, &*olddatabase);
+		XrmPutFileDatabase(*olddatabase, filename); //save database to file
+		*database=0; //don't try to destroy the database
+	} else //save database to file
+		XrmPutFileDatabase(*database, filename);
+
+	return true;
+}
+
+void ResourceManager::ensureXrmIsInitialize() {
+	if (!m_init) {
+		XrmInitialize();
+		m_init = true;
+	}
+}
+	

A src/Resource.hh

@@ -0,0 +1,107 @@ 
+// Resource.hh
+// Copyright (c) 2002 Henrik Kinnunen (fluxgen@linuxmail.org)
+//
+// 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.
+
+#ifndef _RESOURCE_HH_
+#define _RESOURCE_HH_
+
+#include "NotCopyable.hh"
+#include <string>
+#include <list>
+
+class Resource_base:private NotCopyable
+{
+public:
+
+	virtual void setFromString(char const *strval)=0;
+	virtual void setDefaultValue()=0;
+	
+	virtual std::string getString()=0;
+	inline std::string& getAltName() { return m_altname; }
+	inline std::string& getName() { return m_name; }
+	
+protected:	
+	Resource_base(const std::string &name, const std::string &altname):
+	m_name(name), m_altname(altname)
+	{
+	
+	}
+	virtual ~Resource_base(){	};
+private:
+	std::string m_name, m_altname;
+};
+
+class ResourceManager;
+
+template <typename T>
+class Resource:public Resource_base
+{
+public:	
+	Resource(ResourceManager &rm, T val, 
+	const std::string &name, const std::string &altname):
+	Resource_base(name, altname),
+	m_value(val), m_defaultval(val),
+	m_rm(rm)
+	{
+		m_rm.addResource(*this);
+	}
+	~Resource() {
+		m_rm.removeResource(*this);
+	}
+
+	inline void setDefaultValue() {  m_value = m_defaultval; }
+	void setFromString(const char *strval);
+	inline Resource<T>& operator = (const T& newvalue) { m_value = newvalue;  return *this;}
+	
+	std::string getString();	
+	inline T& operator*(void) { return m_value; }
+	inline T *operator->(void) { return &m_value; }
+private:
+	T m_value, m_defaultval;
+	ResourceManager &m_rm;
+};
+
+class ResourceManager
+{
+public:
+	typedef std::list<Resource_base *> ResourceList;
+
+	ResourceManager(){ }	
+	
+	bool load(const char *filename);
+	bool save(const char *filename, const char *mergefilename=0);
+	template <class T>
+	void addResource(Resource<T> &r) {
+		m_resourcelist.push_back(&r);
+		m_resourcelist.unique();
+	}
+	template <class T>
+	void removeResource(Resource<T> &r) {
+		m_resourcelist.remove(&r);
+	}
+private:
+	static inline void ensureXrmIsInitialize();
+	static bool m_init;
+	ResourceList m_resourcelist;
+
+};
+
+
+#endif //_RESOURCE_HH_