Move most platform-specific code into overlay directories

[libs/core.git] / source / core / application.cpp

diff --git a/source/core/application.cpp b/source/core/application.cpp
index 17611c1429ac2ef716c1687ba892b3b6356e6f74..36621e92ae99af9b74a2726263fd3b8176cbd020 100644 (file)
--- a/source/core/application.cpp
+++ b/source/core/application.cpp
@@ -1,110 +1,74 @@
-/* $Id$
-
-This file is part of libmspcore
-Copyright © 2006-2008, 2011  Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
 #include <signal.h>
-#include <iostream>
-#include <typeinfo>
-#include "../debug/backtrace.h"
-#include "../debug/demangle.h"
-#include "../time/units.h"
-#include "../time/utils.h"
+#include <msp/io/print.h>
 #include "application.h"
-#include "except.h"
+#include "getopt.h"
 
 using namespace std;
 
 namespace Msp {
 
+Application *Application::app_ = 0;
+Application::Starter *Application::starter_ = 0;
+void *Application::data_ = 0;
+
 Application::Application():
        exit_code(0)
 { }
 
 /**
 Constructs an instance of the registered application class and runs it.  If the
-application throws a UsageError, the static usage() function is called.
+application throws a usage_error, a help message is printed.  The GetOpt class
+will throw such exceptions automatically in error conditions.
 
 This function can only be called once.  The global main() function provided by
 the library normally does it automatically at program startup.
 */
 int Application::run(int argc, char **argv, void *data)
 {
-       static bool called=false;
+       static bool called = false;
        if(called)
        {
-               cerr<<"Trying to call Application::run_app twice!\n";
+               IO::cerr.write("Trying to call Application::run_app twice!\n");
                return 125;
        }
-       called=true;
+       called = true;
 
-       if(!reg_app_)
+       if(!starter_)
        {
-               cerr<<"Trying to run with no application class registered!\n";
+               IO::cerr.write("Trying to run with no RegisteredApplication class!\n");
                return 126;
        }
 
-       data_=data;
+       data_ = data;
 
        try
        {
                try
                {
-                       app_=reg_app_->create_app(argc, argv);
+                       app_ = starter_->create_app(argc, argv);
                }
-               catch(const UsageError &e)
+               catch(const usage_error &e)
                {
-                       reg_app_->usage(e.what(), argv[0], e.get_brief());
+                       IO::print(IO::cerr, "%s\n%s\n", e.what(), e.help());
                        return 1;
                }
 
-               int result=app_->main();
-               delete app_;
+               int result = app_->main();
+               Application *a = app_;
+               app_ = 0;
+               delete a;
                return result;
        }
        catch(const exception &e)
        {
                delete app_;
 
-#ifdef WIN32
-               string msg=Debug::demangle(typeid(e).name())+":\n"+e.what();
-               MessageBoxA(0, msg.c_str(), "Uncaught exception", MB_OK|MB_ICONERROR);
-#else
-               cerr<<"An uncaught exception occurred.\n";
-               cerr<<"  type:   "<<Debug::demangle(typeid(e).name())<<'\n';
-               cerr<<"  what(): "<<e.what()<<'\n';
-
-               const Exception *exc=dynamic_cast<const Exception *>(&e);
-               if(exc && !exc->get_backtrace().get_frames().empty())
-               {
-                       cerr<<"  backtrace:\n";
-                       const list<Debug::Backtrace::StackFrame> &frames=exc->get_backtrace().get_frames();
-                       for(list<Debug::Backtrace::StackFrame>::const_iterator i=frames.begin(); i!=frames.end(); ++i)
-                               cerr<<"    "<<*i<<'\n';
-               }
-#endif
+               display_exception(e);
 
                return 124;
        }
 }
 
-/**
-Prints a message describing the usage of the application.  The default version
-will blame the programmer for being lazy.
-
-@param   reason  Why the function was called
-@param   argv0   The value of argv[0], to be used in the message
-@param   brief   Whether to print a brief or long usage message
-*/
-void Application::usage(const char *reason, const char *, bool)
-{
-       if(reason)
-               cerr<<"UsageError: "<<reason<<'\n';
-       cerr<<"The programmer was lazy and didn't write a usage() function for this application.\n";
-}
-
 /**
 Default main loop.  Calls tick() repeatedly until exit() is called.  A custom
 main loop should monitor the done member variable and return exit_code.
@@ -144,19 +108,12 @@ void Application::sighandler_(int s)
 }
 
 
-Application::RegBase::RegBase()
+Application::Starter::Starter()
 {
-       if(reg_app_)
-       {
-               cerr<<"Warning: registering the application twice\n";
-               delete reg_app_;
-       }
+       if(starter_)
+               throw logic_error("Can't create more than one Starter instance");
 
-       reg_app_=this;
+       starter_ = this;
 }
 
-Application *Application::app_=0;
-Application::RegBase *Application::reg_app_=0;
-void *Application::data_=0;
-
 } // namespace Msp