1 /*
2   Simple DirectMedia Layer
3   Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
4 
5   This software is provided 'as-is', without any express or implied
6   warranty.  In no event will the authors be held liable for any damages
7   arising from the use of this software.
8 
9   Permission is granted to anyone to use this software for any purpose,
10   including commercial applications, and to alter it and redistribute it
11   freely, subject to the following restrictions:
12 
13   1. The origin of this software must not be misrepresented; you must not
14      claim that you wrote the original software. If you use this software
15      in a product, an acknowledgment in the product documentation would be
16      appreciated but is not required.
17   2. Altered source versions must be plainly marked as such, and must not be
18      misrepresented as being the original software.
19   3. This notice may not be removed or altered from any source distribution.
20 */
21 
22 /**
23  *  \file SDL_log.h
24  *
25  *  Simple log messages with categories and priorities.
26  *
27  *  By default logs are quiet, but if you're debugging SDL you might want:
28  *
29  *      SDL_LogSetAllPriority(SDL_LOG_PRIORITY_WARN);
30  *
31  *  Here's where the messages go on different platforms:
32  *      Windows: debug output stream
33  *      Android: log output
34  *      Others: standard error output (stderr)
35  */
36 
37 #ifndef SDL_log_h_
38 #define SDL_log_h_
39 
40 #include "SDL_stdinc.h"
41 
42 #include "begin_code.h"
43 /* Set up for C function definitions, even when using C++ */
44 #ifdef __cplusplus
45 extern "C" {
46 #endif
47 
48 
49 /**
50  *  \brief The maximum size of a log message
51  *
52  *  Messages longer than the maximum size will be truncated
53  */
54 #define SDL_MAX_LOG_MESSAGE 4096
55 
56 /**
57  *  \brief The predefined log categories
58  *
59  *  By default the application category is enabled at the INFO level,
60  *  the assert category is enabled at the WARN level, test is enabled
61  *  at the VERBOSE level and all other categories are enabled at the
62  *  CRITICAL level.
63  */
64 typedef enum
65 {
66     SDL_LOG_CATEGORY_APPLICATION,
67     SDL_LOG_CATEGORY_ERROR,
68     SDL_LOG_CATEGORY_ASSERT,
69     SDL_LOG_CATEGORY_SYSTEM,
70     SDL_LOG_CATEGORY_AUDIO,
71     SDL_LOG_CATEGORY_VIDEO,
72     SDL_LOG_CATEGORY_RENDER,
73     SDL_LOG_CATEGORY_INPUT,
74     SDL_LOG_CATEGORY_TEST,
75 
76     /* Reserved for future SDL library use */
77     SDL_LOG_CATEGORY_RESERVED1,
78     SDL_LOG_CATEGORY_RESERVED2,
79     SDL_LOG_CATEGORY_RESERVED3,
80     SDL_LOG_CATEGORY_RESERVED4,
81     SDL_LOG_CATEGORY_RESERVED5,
82     SDL_LOG_CATEGORY_RESERVED6,
83     SDL_LOG_CATEGORY_RESERVED7,
84     SDL_LOG_CATEGORY_RESERVED8,
85     SDL_LOG_CATEGORY_RESERVED9,
86     SDL_LOG_CATEGORY_RESERVED10,
87 
88     /* Beyond this point is reserved for application use, e.g.
89        enum {
90            MYAPP_CATEGORY_AWESOME1 = SDL_LOG_CATEGORY_CUSTOM,
91            MYAPP_CATEGORY_AWESOME2,
92            MYAPP_CATEGORY_AWESOME3,
93            ...
94        };
95      */
96     SDL_LOG_CATEGORY_CUSTOM
97 } SDL_LogCategory;
98 
99 /**
100  *  \brief The predefined log priorities
101  */
102 typedef enum
103 {
104     SDL_LOG_PRIORITY_VERBOSE = 1,
105     SDL_LOG_PRIORITY_DEBUG,
106     SDL_LOG_PRIORITY_INFO,
107     SDL_LOG_PRIORITY_WARN,
108     SDL_LOG_PRIORITY_ERROR,
109     SDL_LOG_PRIORITY_CRITICAL,
110     SDL_NUM_LOG_PRIORITIES
111 } SDL_LogPriority;
112 
113 
114 /**
115  *  \brief Set the priority of all log categories
116  */
117 extern DECLSPEC void SDLCALL SDL_LogSetAllPriority(SDL_LogPriority priority);
118 
119 /**
120  *  \brief Set the priority of a particular log category
121  */
122 extern DECLSPEC void SDLCALL SDL_LogSetPriority(int category,
123                                                 SDL_LogPriority priority);
124 
125 /**
126  *  \brief Get the priority of a particular log category
127  */
128 extern DECLSPEC SDL_LogPriority SDLCALL SDL_LogGetPriority(int category);
129 
130 /**
131  *  \brief Reset all priorities to default.
132  *
133  *  \note This is called in SDL_Quit().
134  */
135 extern DECLSPEC void SDLCALL SDL_LogResetPriorities(void);
136 
137 /**
138  *  \brief Log a message with SDL_LOG_CATEGORY_APPLICATION and SDL_LOG_PRIORITY_INFO
139  */
140 extern DECLSPEC void SDLCALL SDL_Log(SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(1);
141 
142 /**
143  *  \brief Log a message with SDL_LOG_PRIORITY_VERBOSE
144  */
145 extern DECLSPEC void SDLCALL SDL_LogVerbose(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(2);
146 
147 /**
148  *  \brief Log a message with SDL_LOG_PRIORITY_DEBUG
149  */
150 extern DECLSPEC void SDLCALL SDL_LogDebug(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(2);
151 
152 /**
153  *  \brief Log a message with SDL_LOG_PRIORITY_INFO
154  */
155 extern DECLSPEC void SDLCALL SDL_LogInfo(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(2);
156 
157 /**
158  *  \brief Log a message with SDL_LOG_PRIORITY_WARN
159  */
160 extern DECLSPEC void SDLCALL SDL_LogWarn(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(2);
161 
162 /**
163  *  \brief Log a message with SDL_LOG_PRIORITY_ERROR
164  */
165 extern DECLSPEC void SDLCALL SDL_LogError(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(2);
166 
167 /**
168  *  \brief Log a message with SDL_LOG_PRIORITY_CRITICAL
169  */
170 extern DECLSPEC void SDLCALL SDL_LogCritical(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(2);
171 
172 /**
173  *  \brief Log a message with the specified category and priority.
174  */
175 extern DECLSPEC void SDLCALL SDL_LogMessage(int category,
176                                             SDL_LogPriority priority,
177                                             SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(3);
178 
179 /**
180  *  \brief Log a message with the specified category and priority.
181  */
182 extern DECLSPEC void SDLCALL SDL_LogMessageV(int category,
183                                              SDL_LogPriority priority,
184                                              const char *fmt, va_list ap);
185 
186 /**
187  *  \brief The prototype for the log output function
188  */
189 typedef void (SDLCALL *SDL_LogOutputFunction)(void *userdata, int category, SDL_LogPriority priority, const char *message);
190 
191 /**
192  *  \brief Get the current log output function.
193  */
194 extern DECLSPEC void SDLCALL SDL_LogGetOutputFunction(SDL_LogOutputFunction *callback, void **userdata);
195 
196 /**
197  *  \brief This function allows you to replace the default log output
198  *         function with one of your own.
199  */
200 extern DECLSPEC void SDLCALL SDL_LogSetOutputFunction(SDL_LogOutputFunction callback, void *userdata);
201 
202 
203 /* Ends C function definitions when using C++ */
204 #ifdef __cplusplus
205 }
206 #endif
207 #include "close_code.h"
208 
209 #endif /* SDL_log_h_ */
210 
211 /* vi: set ts=4 sw=4 expandtab: */
212