2009-04-18 19:00:33 +02:00
|
|
|
/* Copyright (C) 2009 Wildfire Games.
|
|
|
|
* This file is part of 0 A.D.
|
|
|
|
*
|
|
|
|
* 0 A.D. is free software: you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License as published by
|
|
|
|
* the Free Software Foundation, either version 2 of the License, or
|
|
|
|
* (at your option) any later version.
|
|
|
|
*
|
|
|
|
* 0 A.D. is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
* GNU General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
*/
|
|
|
|
|
2007-05-07 18:33:24 +02:00
|
|
|
#ifndef INCLUDED_ERRORS
|
|
|
|
#define INCLUDED_ERRORS
|
2004-07-15 21:10:33 +02:00
|
|
|
|
2010-01-09 20:20:14 +01:00
|
|
|
/*
|
|
|
|
|
|
|
|
The overly-complex error system works as follows:
|
|
|
|
|
|
|
|
A source file (typically a .h) can declare errors as follows:
|
|
|
|
|
|
|
|
ERROR_GROUP(ModuleName);
|
|
|
|
ERROR_TYPE(ModuleName, FrobnificationFailed);
|
|
|
|
ERROR_SUBGROUP(ModuleName, ComponentName);
|
|
|
|
ERROR_TYPE(ModuleName_ComponentName, FileNotFound);
|
|
|
|
|
|
|
|
etc, to build up a hierarchy of error types.
|
|
|
|
|
|
|
|
Then you have to run the /build/errorlist/errorlist.pl script, to regenerate
|
|
|
|
the Errors.cpp file.
|
|
|
|
|
|
|
|
Then you can use the declared errors as an error code:
|
|
|
|
|
|
|
|
PSRETURN foo() { return PSRETURN_ModuleName_FrobnificationFailed; }
|
|
|
|
|
|
|
|
if (ret != PSRETURN_OK)
|
|
|
|
... // something failed
|
|
|
|
|
|
|
|
if (ret)
|
|
|
|
... // something failed
|
|
|
|
|
|
|
|
if (ret == PSRETURN_ModuleName_FrobnificationFailed)
|
|
|
|
... // particular error
|
|
|
|
|
|
|
|
if (ERROR_IS(ret, PSRETURN_ModuleName))
|
|
|
|
... // matches any type PSRETURN_ModuleName_* (and PSRETURN_ModuleName_*_* etc)
|
|
|
|
|
|
|
|
And you can use it as an exception:
|
|
|
|
|
|
|
|
void foo() { throw PSERROR_ModuleName_FrobnificationFailed(); }
|
|
|
|
|
|
|
|
void bar() { throw PSERROR_ModuleName_FrobnificationFailed("More informative message"); }
|
|
|
|
|
|
|
|
try {
|
|
|
|
foo();
|
|
|
|
} catch (PSERROR_ModuleName_FrobnificationFailed e) {
|
|
|
|
// catches that particular error type
|
|
|
|
} catch (PSERROR_ModuleName e) {
|
|
|
|
// catches anything in the hierarchy
|
|
|
|
} catch (PSERROR e) {
|
|
|
|
std::cout << e.what();
|
|
|
|
}
|
|
|
|
|
|
|
|
plus a few extra things for converting between error codes and exceptions.
|
|
|
|
|
|
|
|
*/
|
|
|
|
|
2005-05-24 02:00:40 +02:00
|
|
|
#include <exception>
|
|
|
|
|
2004-07-24 16:04:40 +02:00
|
|
|
typedef u32 PSRETURN;
|
2004-07-18 13:51:15 +02:00
|
|
|
|
2005-05-24 02:00:40 +02:00
|
|
|
class PSERROR : public std::exception
|
2004-07-15 21:10:33 +02:00
|
|
|
{
|
|
|
|
public:
|
2010-01-09 20:20:14 +01:00
|
|
|
PSERROR(const char* msg);
|
2005-05-24 02:00:40 +02:00
|
|
|
virtual const char* what() const throw ();
|
|
|
|
virtual PSRETURN getCode() const = 0; // for functions that catch exceptions then return error codes
|
2010-01-09 20:20:14 +01:00
|
|
|
private:
|
|
|
|
const char* m_msg;
|
2004-07-15 21:10:33 +02:00
|
|
|
};
|
|
|
|
|
2010-01-09 20:20:14 +01:00
|
|
|
#define ERROR_GROUP(a) class PSERROR_##a : public PSERROR { protected: PSERROR_##a(const char* msg); }; \
|
2004-07-18 13:51:15 +02:00
|
|
|
extern const PSRETURN MASK__PSRETURN_##a; \
|
|
|
|
extern const PSRETURN CODE__PSRETURN_##a
|
|
|
|
|
2010-01-09 20:20:14 +01:00
|
|
|
#define ERROR_SUBGROUP(a,b) class PSERROR_##a##_##b : public PSERROR_##a { protected: PSERROR_##a##_##b(const char* msg); }; \
|
2004-07-18 13:51:15 +02:00
|
|
|
extern const PSRETURN MASK__PSRETURN_##a##_##b; \
|
|
|
|
extern const PSRETURN CODE__PSRETURN_##a##_##b
|
|
|
|
|
|
|
|
|
2010-01-09 20:20:14 +01:00
|
|
|
#define ERROR_TYPE(a,b) class PSERROR_##a##_##b : public PSERROR_##a { public: PSERROR_##a##_##b(); PSERROR_##a##_##b(const char* msg); PSRETURN getCode() const; }; \
|
2004-07-18 13:51:15 +02:00
|
|
|
extern const PSRETURN MASK__PSRETURN_##a##_##b; \
|
|
|
|
extern const PSRETURN CODE__PSRETURN_##a##_##b; \
|
|
|
|
extern const PSRETURN PSRETURN_##a##_##b
|
|
|
|
|
|
|
|
#define ERROR_IS(a, b) ( ((a) & MASK__PSRETURN_##b) == CODE__PSRETURN_##b )
|
|
|
|
|
|
|
|
const PSRETURN PSRETURN_OK = 0;
|
2007-01-01 22:25:47 +01:00
|
|
|
const PSRETURN MASK__PSRETURN_OK = 0xFFFFFFFF;
|
2004-07-18 13:51:15 +02:00
|
|
|
const PSRETURN CODE__PSRETURN_OK = 0;
|
2004-07-15 21:10:33 +02:00
|
|
|
|
2005-05-24 02:00:40 +02:00
|
|
|
const char* GetErrorString(PSRETURN code);
|
2004-08-27 19:43:04 +02:00
|
|
|
void ThrowError(PSRETURN code);
|
2004-07-15 21:10:33 +02:00
|
|
|
|
2004-07-15 21:59:27 +02:00
|
|
|
#endif
|