You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
tdegraphics/kviewshell/plugins/djvu/libdjvu/GException.cpp

285 lines
7.6 KiB

//C- -*- C++ -*-
//C- -------------------------------------------------------------------
//C- DjVuLibre-3.5
//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun.
//C- Copyright (c) 2001 AT&T
//C-
//C- This software is subject to, and may be distributed under, the
//C- GNU General Public License, Version 2. The license should have
//C- accompanied the software or you may obtain a copy of the license
//C- from the Free Software Foundation at http://www.fsf.org .
//C-
//C- This program is distributed in the hope that it will be useful,
//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//C- GNU General Public License for more details.
//C-
//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
//C- distributed by Lizardtech Software. On July 19th 2002, Lizardtech
//C- Software authorized us to replace the original DjVu(r) Reference
//C- Library notice by the following text (see doc/lizard2002.djvu):
//C-
//C- ------------------------------------------------------------------
//C- | DjVu (r) Reference Library (v. 3.5)
//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
//C- | The DjVu Reference Library is protected by U.S. Pat. No.
//C- | 6,058,214 and patents pending.
//C- |
//C- | This software is subject to, and may be distributed under, the
//C- | GNU General Public License, Version 2. The license should have
//C- | accompanied the software or you may obtain a copy of the license
//C- | from the Free Software Foundation at http://www.fsf.org .
//C- |
//C- | The computer code originally released by LizardTech under this
//C- | license and unmodified by other parties is deemed "the LIZARDTECH
//C- | ORIGINAL CODE." Subject to any third party intellectual property
//C- | claims, LizardTech grants recipient a worldwide, royalty-free,
//C- | non-exclusive license to make, use, sell, or otherwise dispose of
//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the
//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU
//C- | General Public License. This grant only confers the right to
//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to
//C- | the extent such infringement is reasonably necessary to enable
//C- | recipient to make, have made, practice, sell, or otherwise dispose
//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to
//C- | any greater extent that may be necessary to utilize further
//C- | modifications or combinations.
//C- |
//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
//C- +------------------------------------------------------------------
//
// $Id: GException.cpp,v 1.14 2004/08/06 15:11:29 leonb Exp $
// $Name: release_3_5_15 $
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#if NEED_GNUG_PRAGMAS
# pragma implementation
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "GException.h"
#include "DjVuMessageLite.h"
#include "debug.h"
#ifdef HAVE_NAMESPACES
namespace DJVU {
# ifdef NOT_DEFINED // Just to fool emacs c++ mode
}
#endif
#endif
// - Author: Leon Bottou, 05/1997
GException::GException()
: cause(0), file(0), func(0), line(0), source(GException::GINTERNAL)
{
}
const char * const
GException::outofmemory = ERR_MSG("GException.outofmemory");
GException::GException(const GException & exc)
: file(exc.file), func(exc.func), line(exc.line), source(exc.source)
{
if (exc.cause && exc.cause!=outofmemory)
{
char *s = new char[strlen(exc.cause)+1];
strcpy(s, exc.cause);
cause = s;
}
else
{
cause = exc.cause;
}
}
GException::GException (const char *xcause, const char *file, int line,
const char *func, const source_type xsource)
: file(file), func(func), line(line), source(xsource)
{
// good place to set a breakpoint and DEBUG message too.
// It'd hard to track exceptions which seem to go from nowhere
#ifdef DEBUG_MSG
DEBUG_MSG("GException::GException(): cause=" << (xcause ? xcause : "unknown") << "\n");
#endif
if (xcause && xcause!=outofmemory)
{
char *s = new char[strlen(xcause)+1];
strcpy(s, xcause);
cause = s;
}
else
{
cause = xcause;
}
}
GException::~GException(void)
{
if (cause && cause!=outofmemory )
delete [] const_cast<char*>(cause);
cause=file=func=0;
}
GException &
GException::operator=(const GException & exc)
{
if (cause && cause!=outofmemory)
delete [] const_cast<char*>(cause);
cause = 0;
file = exc.file;
func = exc.func;
line = exc.line;
source=exc.source;
if (exc.cause && exc.cause!=outofmemory)
{
char *s = new char[strlen(exc.cause)+1];
strcpy(s, exc.cause);
cause = s;
}
else
{
cause = exc.cause;
}
return *this;
}
void
GException::perror(void) const
{
fflush(0);
DjVuPrintErrorUTF8("*** ");
DjVuMessageLite::perror(get_cause());
if (file && line>0)
DjVuPrintErrorUTF8("*** (%s:%d)\n", file, line);
else if (file)
DjVuPrintErrorUTF8("*** (%s)\n", file);
if (func)
DjVuPrintErrorUTF8("*** '%s'\n", func);
DjVuPrintErrorUTF8("\n");
}
const char*
GException::get_cause(void) const
{
if (! cause)
return "Invalid exception";
return cause;
}
int
GException::cmp_cause(const char s1[] , const char s2[])
{
int retval;
if(! s2 || !s2[0])
{
retval=(s1&&s1[0])?1:(-1);
}else if(! s1 || !s1[0])
{
retval=(-1);
}else
{
const char *end_s1=strpbrk(s1,"\t\n");
const int n1=end_s1?(int)((size_t)end_s1-(size_t)s1):strlen(s1);
const char *end_s2=strpbrk(s1,"\t\n");
const int n2=end_s2?(int)((size_t)end_s2-(size_t)s2):strlen(s2);
retval=(n1==n2)?strncmp(s1,s2,n1):strcmp(s1,s2);
}
return retval;
}
int
GException::cmp_cause(const char s2[]) const
{
return cmp_cause(cause,s2);
}
#ifdef USE_EXCEPTION_EMULATION
GExceptionHandler *GExceptionHandler::head = 0;
void
GExceptionHandler::emthrow(const GException &gex)
{
if (head)
{
head->current = gex;
longjmp(head->jump, -1);
}
else
{
DjVuPrintErrorUTF8("\n*** Unhandled exception");
gex.perror();
abort();
}
}
#else // ! USE_EXCEPTION_EMULATION
static int abort_on_exception = 0;
void
#ifndef NO_LIBGCC_HOOKS
GExceptionHandler::exthrow(const GException &ex)
#else
GExceptionHandler::exthrow(const GException ex)
#endif /* NO_LIBGCC_HOOKS */
{
if (abort_on_exception)
abort();
throw ex;
}
void
GExceptionHandler::rethrow(void)
{
if (abort_on_exception)
abort();
throw;
}
#endif
// ------ MEMORY MANAGEMENT HANDLER
#ifndef NEED_DJVU_MEMORY
// This is not activated when C++ memory management
// is overidden. The overriding functions handle
// memory exceptions by themselves.
# if defined(_MSC_VER)
// Microsoft is different!
static int throw_memory_error(size_t) { G_THROW(GException::outofmemory); return 0; }
static int (*old_handler)(size_t) = _set_new_handler(throw_memory_error);
# else // !_MSC_VER
// Standard C++
static void throw_memory_error() { G_THROW(GException::outofmemory); }
# if !defined(WIN32) && !defined(__CYGWIN32__) && !defined(OS2)
# ifdef HAVE_STDINCLUDES
static void (*old_handler)() = std::set_new_handler(throw_memory_error);
# else
static void (*old_handler)() = set_new_handler(throw_memory_error);
# endif // HAVE_STDINCLUDES
# endif // ! WIN32
# endif // !_MSC_VER
#endif // !NEED_DJVU_MEMORY
#ifdef HAVE_NAMESPACES
}
# ifndef NOT_USING_DJVU_NAMESPACE
using namespace DJVU;
# endif
#endif