1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/*
* 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/flsnprintf.h"
#include "ulib.h"
extern int errno; /* system error no */
#ifndef HAVE_STRERROR
extern char *sys_errlist[ ];
#endif
#define MAXESTR 2048 /* maximum error string len */
/**********************************************************************
* 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; /* 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,
... )
{
va_list args;
char *where,
why[ MAXESTR + 1 ] = "";
/* Check if there is nothing to do */
if ( level >= threshold )
return;
if ( ! errlog )
errlog = stderr;
/* Set up the string where it happended */
if ( func )
{
char line[ 20 ];
if ( lineno > 0 )
sprintf( line, "%d", lineno );
else
strcpy( line, "?" );
where = *func ?
fli_vstrcat( "In ", func, "() [", file, ":", line, "] ",
( char * ) 0 ) :
fli_vstrcat( "In [", file, ":", line, "]: ", ( char * ) 0 );
}
else
where = strdup( "" );
/* Now find out why */
if ( fmt && *fmt )
{
va_start( args, fmt );
fl_vsnprintf( why, sizeof why, fmt, args );
va_end( args );
}
/* Having gotten the message as well as where and why show it */
fprintf( errlog, "%s%s\n", where, why );
fli_free_vstrcat( where );
}
/*********************************************************************
* 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:
*/
|
