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1 /*
2  * The copyright in this software is being made available under the 2-clauses
3  * BSD License, included below. This software may be subject to other third
4  * party and contributor rights, including patent rights, and no such rights
5  * are granted under this license.
6  *
7  * Copyright (c) 2005, Herve Drolon, FreeImage Team
8  * Copyright (c) 2008, 2011-2012, Centre National d'Etudes Spatiales (CNES), FR
9  * Copyright (c) 2012, CS Systemes d'Information, France
10  * All rights reserved.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  *    notice, this list of conditions and the following disclaimer in the
19  *    documentation and/or other materials provided with the distribution.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31  * POSSIBILITY OF SUCH DAMAGE.
32  */
33 #ifndef OPJ_EVENT_H
34 #define OPJ_EVENT_H
35 /**
36 @file event.h
37 @brief Implementation of a event callback system
38 
39 The functions in EVENT.C have for goal to send output messages (errors, warnings, debug) to the user.
40 */
41 /**
42 Message handler object
43 used for
44 <ul>
45 <li>Error messages
46 <li>Warning messages
47 <li>Debugging messages
48 </ul>
49 */
50 typedef struct opj_event_mgr {
51     /** Data to call the event manager upon */
52     void *          m_error_data;
53     /** Data to call the event manager upon */
54     void *          m_warning_data;
55     /** Data to call the event manager upon */
56     void *          m_info_data;
57     /** Error message callback if available, NULL otherwise */
58     opj_msg_callback error_handler;
59     /** Warning message callback if available, NULL otherwise */
60     opj_msg_callback warning_handler;
61     /** Debug message callback if available, NULL otherwise */
62     opj_msg_callback info_handler;
63 } opj_event_mgr_t;
64 
65 
66 #define EVT_ERROR   1   /**< Error event type */
67 #define EVT_WARNING 2   /**< Warning event type */
68 #define EVT_INFO    4   /**< Debug event type */
69 
70 /** @defgroup EVENT EVENT - Implementation of a event callback system */
71 /*@{*/
72 
73 /** @name Exported functions (see also openjpeg.h) */
74 /*@{*/
75 /* ----------------------------------------------------------------------- */
76 
77 
78 /* ----------------------------------------------------------------------- */
79 
80 /**
81  * Write formatted data to a string and send the string to a user callback.
82  *
83  * @param event_mgr         Event handler
84  * @param event_type        Event type or callback to use to send the message
85  * @param fmt               Format-control string (plus optional arguments)
86  *
87  * @return Returns true if successful, returns false otherwise
88  */
89 OPJ_BOOL opj_event_msg(opj_event_mgr_t* event_mgr, OPJ_INT32 event_type,
90                        const char *fmt, ...);
91 /* ----------------------------------------------------------------------- */
92 
93 /**
94  * Set the event manager with the default callback function for the 3 levels.
95  */
96 void opj_set_default_event_handler(opj_event_mgr_t * p_manager);
97 
98 /*
99 #ifdef __GNUC__
100 #pragma GCC poison printf fprintf
101 #endif
102 */
103 
104 /*@}*/
105 
106 /*@}*/
107 
108 #endif /* OPJ_EVENT_H */
109