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/*
* This file is part of the XForms library package.
*
* XForms is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1, or
* (at your option) any later version.
*
* XForms 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with XForms. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* \file errmsg.c
*
* Copyright(c) 1993,1994 by T.C. Zhao
* All rights reserved.
*
* Error handling routines.
*
* Messages are divided into graphics and non-graphics types.
* For graphical error messages, a user input may be demanded,
* while for non-graphical messages, a string is printed and
* does nothing else.
*
* The graphical output routine must have the following form:
* void (*gmout)(const char *, const char *, const char *, int);
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <stdarg.h>
#include <errno.h>
#include "local.h" /* up stairs */
#include "include/forms.h"
#include "flinternal.h"
#include "private/flvasprintf.h"
#include "ulib.h"
extern int errno; /* system error no */
#ifndef HAVE_STRERROR
extern char *sys_errlist[ ];
#endif
/**********************************************************************
* msg_threshold controls amount of message to print
* 0: only error 1: error and warning
* 2: info 3: more info
* 4: debugging 5: trace
**********************************************************************/
/************ Local variables ****************************************/
static FILE *errlog; /* where the msg is going */
static int threshold; /* current threshold */
static int level; /* requested message level */
static const char *file; /* source file name */
static int lineno = 0; /* line no. in that file */
FL_ERROR_FUNC efp_; /* global pointer to shut up lint */
FL_ERROR_FUNC user_error_function_; /* hook for application error handler */
/***************************************
* set up where err is gonna go
***************************************/
void
fl_set_err_logfp( FILE * fp )
{
if ( fp )
errlog = fp;
}
/***************************************
***************************************/
void
fl_set_error_handler( FL_ERROR_FUNC user_func)
{
user_error_function_ = user_func;
}
/***************************************
***************************************/
const char *
fli_get_syserror_msg( void )
{
const char *pp;
#ifdef HAVE_STRERROR
pp = errno ? strerror( errno ) : "";
#else
pp = errno ? sys_errlist[ errno ] : "";
#endif
return pp;
}
/***************************************
* Message levels
***************************************/
void
fli_set_msg_threshold( int mlevel )
{
threshold = mlevel;
}
/********************************************************************
* Generate two strings that contain where and why an error occured
*********************************************************************/
static void
P_errmsg( const char * func,
const char * fmt,
... )
{
char line[ ( int ) log10( INT_MAX ) + 3 ],
*why;
/* Return if there is nothing to do */
if ( level >= threshold )
return;
if ( ! errlog )
errlog = stderr;
EXPAND_FORMAT_STRING( why, fmt );
if ( lineno > 0 )
sprintf( line, "%d", lineno );
else
strcpy( line, "?" );
if ( func && *func )
fprintf( errlog, "In %s() [%s:%s]: %s\n", func, file, line,
why ? why : "" );
else
fprintf( errlog, "In [%s:%s]: %s\n", file, line, why ? why : "" );
fli_safe_free( why );
}
/*********************************************************************
* Set the level, line number and file where error occurred, return
* the function to use for outputting the error message
********************************************************************/
FL_ERROR_FUNC
fli_error_setup( int lev,
const char * f,
int l )
{
file = f;
lineno = l;
level = lev;
return user_error_function_ ? user_error_function_ : P_errmsg;
}
/*
* Local variables:
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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