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/*GPL*START*
*
* texception - basic exceptions
*
* Copyright (C) 1998 by Johannes Overmann <Johannes.Overmann@gmx.de>
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
* *GPL*END*/
#ifndef _ngw_texception_h_
#define _ngw_texception_h_
extern "C" {
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
}
// history:
// 1999:
// 17:02 04 Jun derived from terror.h
// 2000:
// 11:10 09 Jul tbaseexception and texception merged, message() and name() added
// 00:50 09 Jul internal error added
#define TExceptionN(n) public: virtual const char *name() const { return #n; }
#define TExceptionM(m) public: virtual const char *message() const { return m; }
#define TExceptionM1(m,a) public: virtual const char *message() const { char *buf; int result = asprintf(&buf, m, a); return result != -1 ? buf : "asprintf failure"; }
#define TExceptionM2(m,a,b) public: virtual const char *message() const { char *buf; int result = asprintf(&buf, m, a,b); return result != -1 ? buf : "asprintf failure"; }
#define TExceptionM3(m,a,b,c) public: virtual const char *message() const { char *buf; int result = asprintf(&buf, m, a,b,c); return result != -1 ? buf : "asprintf failure"; }
#define TExceptionM4(m,a,b,c,d) public: virtual const char *message() const { char *buf; int result = asprintf(&buf, m, a,b,c,d); return result != -1 ? buf : "asprintf failure"; }
// base class of all exceptions
class TException {
TExceptionN(TException);
virtual ~TException() {}
TExceptionM("(no message available)");
#if 0
#ifndef __USE_GNU
static void asprintf(char **strp, const char *format, ...) {
va_list ap;
va_start(ap, format);
*strp = new char[1024];
vsprintf(*strp, format, ap);
va_end(ap);
}
#endif
#if !(defined HAVE_STRDUP)
static char *strdup(const char *str) { char *buf; vasprintf(&buf, "%s", str); return buf; }
#endif
#endif
};
// general exceptions, also base classes
class TIndexOutOfRangeException: public TException {
TExceptionN(TIndexOutOfRangeException);
TIndexOutOfRangeException(int lower_, int index_, int upper_):
lower(lower_), index(index_), upper(upper_) {}
TExceptionM3("index %d not in [%d..%d]", index, lower, upper);
int lower, index, upper;
};
class TZeroBasedIndexOutOfRangeException: public TIndexOutOfRangeException {
TExceptionN(TZeroBasedIndexOutOfRangeException);
TZeroBasedIndexOutOfRangeException(int index_, int total_num_): TIndexOutOfRangeException(0, index_, total_num_-1) {}
};
class TErrnoException: public TException {
TExceptionN(TErrnoException);
TErrnoException(int error = -1): err(error) { if(err < 0) err = errno; }
const char *str() const { if(err >= 0) return strerror(err); else return "(no error)"; }
int err;
TExceptionM2("%s (errno #%d)", str(), err);
};
class TOperationErrnoException: public TErrnoException {
TExceptionN(TOperationErrnoException);
TOperationErrnoException(const char *operation_, int error = -1): TErrnoException(error), operation(operation_) {}
const char *operation;
TExceptionM3("%s: %s (errno #%d)", operation, str(), err);
};
class TNotFoundException: public TException {
TExceptionN(TNotFoundException);
};
class TFileOperationErrnoException: public TErrnoException {
TExceptionN(TFileOperationErrnoException);
TFileOperationErrnoException(const char *filename_, const char *operation_, int err_ = -1):
TErrnoException(err_), filename(strdup(filename_)), operation(strdup(operation_)) {}
// virtual ~TFileOperationErrnoException() { free(filename); free(operation); }
const char *filename;
const char *operation;
TExceptionM3("%s: %s (during %s)", filename, TErrnoException::message(), operation);
// TExceptionM2("%s: %s (during )", filename, operation);
// TExceptionM("toll");
};
class TInternalErrorException: public TException {
TExceptionN(TInternalErrorException);
TInternalErrorException(const char *error_ = "unspecific error"): error(strdup(error_)) {}
// ~TInternalErrorException() { free(error); }
char *error;
TExceptionM1("internal error: %s", error);
};
class TNotInitializedException: public TInternalErrorException {
TExceptionN(TNotInitializedException);
TNotInitializedException(const char *type_name_): type_name(type_name_) {}
TExceptionM1("internal_error: object of type '%s' is not initialized", type_name ? type_name : "<unknown>");
const char *type_name;
};
#endif /* texception.h */
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