logger.h

00001 /*************************************************************************
00002  *              ESLA: Embeddable Scripting LAnguage
00003  *                  Copyright (C) 2003 Frantz Maerten
00004  *
00005  *   This  program  is  free  software;  you  can  redistribute it and/or
00006  *   modify  it  under  the  terms  of  the GNU General Public License as
00007  *   published  by  the Free Software Foundation; either version 2 of the
00008  *   License, or (at your option) any later version.
00009  *
00010  *   If  you modify this software, you should contact the author, include
00011  *   a  notice giving the name of the person performing the modification,
00012  *   the date of modification, and the reason for such modification.
00013  *
00014  *   Note   that   the   GNU  General  Public  License  does  not  permit
00015  *   incorporating the Software into proprietary programs.
00016  *
00017  *  Contact: Frantz Maerten
00018  *     frantz@pangea.stanford.edu
00019  *
00020  *     Dept. of Geological & Environmental Sciences
00021  *     Stanford University 
00022  *     Stanford, CA 94305-2115
00023  *     USA
00024  *************************************************************************/
00025 
00026 
00027 #ifndef ESLA_LOGGER
00028 #define ESLA_LOGGER
00029 
00030 #include "../esla_namespace.h"
00031 #include "smart_pointer.h"
00032 #include <iostream>
00033 #include <fstream>
00034 #include <string>
00035 #include <set>
00036 #include <map>
00037 
00038 
00039 BEGIN_LIB_NAMESPACE
00040 
00041 class Writer ;
00042   
00057 class Logger {
00058    friend class Writer ;
00059    
00060  public:
00061    struct Beginl {
00062       Beginl();
00063    } ;
00064    struct Endl {
00065       Endl() ;
00066    } ;
00067    static const Endl   endl ;
00068    static const Beginl beginl ;
00069 
00070    Logger() ;
00071    virtual ~Logger() ;
00072    
00073    bool connect(Writer* w, const std::string& name, bool active = true) ;
00074    void connect(const Logger&) ;
00075    bool disconnect(const std::string& name) ;
00076    void disconnect_all() ;
00077    
00078    void activate(const std::string& name) ;
00079    void deactivate(const std::string& name) ;
00080    void activate_alone(const std::string& name) ;
00081    void activate_all() ;
00082    void deactivate_all() ;
00083    bool is_activated(const std::string& name) const ;
00084    
00085  private:
00086    struct WInfo {
00087       WInfo() ;
00088       WInfo(Writer*, const std::string&, bool) ;
00089       WInfo(const WInfo&) ;
00090       WInfo operator=(const WInfo&) ;
00091       
00092       SmartPointer<Writer> writer_ ;
00093       bool active_ ;
00094       std::string name_ ;
00095    } ;
00096    
00097    typedef std::map<std::string, WInfo> Map ;
00098    Map map_ ;
00099    
00100    void write(const std::string& s) ;
00101    void write_endl() ;
00102    void write_beginl() ;
00103    
00104    friend Logger& operator << (Logger&, const Logger::Beginl&) ;
00105    friend Logger& operator << (Logger&, const Logger::Endl&) ;
00106    friend Logger& operator << (Logger&, const std::string&) ;
00107    friend Logger& operator << (Logger&, const char*) ;
00108    friend Logger& operator << (Logger&, bool) ;
00109    friend Logger& operator << (Logger&, short) ;
00110    friend Logger& operator << (Logger&, char) ;
00111    friend Logger& operator << (Logger&, int) ;
00112    friend Logger& operator << (Logger&, unsigned int) ;
00113    friend Logger& operator << (Logger&, long int) ;
00114    friend Logger& operator << (Logger&, float) ;
00115    friend Logger& operator << (Logger&, double) ;
00116 } ;
00117 
00118 Logger& operator << (Logger&, const Logger::Beginl&) ;
00119 Logger& operator << (Logger&, const Logger::Endl&) ;
00120 Logger& operator << (Logger&, const std::string&) ;
00121 Logger& operator << (Logger&, const char*) ;
00122 Logger& operator << (Logger&, bool) ;
00123 Logger& operator << (Logger&, char) ;
00124 Logger& operator << (Logger&, int) ;
00125 Logger& operator << (Logger&, unsigned int) ;
00126 Logger& operator << (Logger&, long int) ;
00127 Logger& operator << (Logger&, float) ;
00128 Logger& operator << (Logger&, double) ;
00129 
00130 
00131 
00132 END_LIB_NAMESPACE
00133   
00134 #endif
00135