added Resource.cc/.hh

2 files changed, 223 insertions, 0 deletions

diff --git a/src/Resource.cc b/src/Resource.cc
new file mode 100644
index 0000000..c53e301
--- /dev/null
+++ b/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;
+        }
+}
+        
diff --git a/src/Resource.hh b/src/Resource.hh
new file mode 100644
index 0000000..38bea30
--- /dev/null
+++ b/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_