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1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2024 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
45extern "C" {
46#endif
47
48
49/**
50 * \brief The maximum size of a log message prior to SDL 2.0.24
51 *
52 * As of 2.0.24 there is no limit to the length of SDL log messages.
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 * ERROR level.
63 */
64typedef 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 */
102typedef 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 * Set the priority of all log categories.
116 *
117 * \param priority the SDL_LogPriority to assign
118 *
119 * \since This function is available since SDL 2.0.0.
120 *
121 * \sa SDL_LogSetPriority
122 */
123extern DECLSPEC void SDLCALL SDL_LogSetAllPriority(SDL_LogPriority priority);
124
125/**
126 * Set the priority of a particular log category.
127 *
128 * \param category the category to assign a priority to
129 * \param priority the SDL_LogPriority to assign
130 *
131 * \since This function is available since SDL 2.0.0.
132 *
133 * \sa SDL_LogGetPriority
134 * \sa SDL_LogSetAllPriority
135 */
136extern DECLSPEC void SDLCALL SDL_LogSetPriority(int category,
137 SDL_LogPriority priority);
138
139/**
140 * Get the priority of a particular log category.
141 *
142 * \param category the category to query
143 * \returns the SDL_LogPriority for the requested category
144 *
145 * \since This function is available since SDL 2.0.0.
146 *
147 * \sa SDL_LogSetPriority
148 */
149extern DECLSPEC SDL_LogPriority SDLCALL SDL_LogGetPriority(int category);
150
151/**
152 * Reset all priorities to default.
153 *
154 * This is called by SDL_Quit().
155 *
156 * \since This function is available since SDL 2.0.0.
157 *
158 * \sa SDL_LogSetAllPriority
159 * \sa SDL_LogSetPriority
160 */
161extern DECLSPEC void SDLCALL SDL_LogResetPriorities(void);
162
163/**
164 * Log a message with SDL_LOG_CATEGORY_APPLICATION and SDL_LOG_PRIORITY_INFO.
165 *
166 * = * \param fmt a printf() style message format string
167 *
168 * \param ... additional parameters matching % tokens in the `fmt` string, if
169 * any
170 *
171 * \since This function is available since SDL 2.0.0.
172 *
173 * \sa SDL_LogCritical
174 * \sa SDL_LogDebug
175 * \sa SDL_LogError
176 * \sa SDL_LogInfo
177 * \sa SDL_LogMessage
178 * \sa SDL_LogMessageV
179 * \sa SDL_LogVerbose
180 * \sa SDL_LogWarn
181 */
182extern DECLSPEC void SDLCALL SDL_Log(SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(1);
183
184/**
185 * Log a message with SDL_LOG_PRIORITY_VERBOSE.
186 *
187 * \param category the category of the message
188 * \param fmt a printf() style message format string
189 * \param ... additional parameters matching % tokens in the **fmt** string,
190 * if any
191 *
192 * \since This function is available since SDL 2.0.0.
193 *
194 * \sa SDL_Log
195 * \sa SDL_LogCritical
196 * \sa SDL_LogDebug
197 * \sa SDL_LogError
198 * \sa SDL_LogInfo
199 * \sa SDL_LogMessage
200 * \sa SDL_LogMessageV
201 * \sa SDL_LogWarn
202 */
203extern DECLSPEC void SDLCALL SDL_LogVerbose(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(2);
204
205/**
206 * Log a message with SDL_LOG_PRIORITY_DEBUG.
207 *
208 * \param category the category of the message
209 * \param fmt a printf() style message format string
210 * \param ... additional parameters matching % tokens in the **fmt** string,
211 * if any
212 *
213 * \since This function is available since SDL 2.0.0.
214 *
215 * \sa SDL_Log
216 * \sa SDL_LogCritical
217 * \sa SDL_LogError
218 * \sa SDL_LogInfo
219 * \sa SDL_LogMessage
220 * \sa SDL_LogMessageV
221 * \sa SDL_LogVerbose
222 * \sa SDL_LogWarn
223 */
224extern DECLSPEC void SDLCALL SDL_LogDebug(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(2);
225
226/**
227 * Log a message with SDL_LOG_PRIORITY_INFO.
228 *
229 * \param category the category of the message
230 * \param fmt a printf() style message format string
231 * \param ... additional parameters matching % tokens in the **fmt** string,
232 * if any
233 *
234 * \since This function is available since SDL 2.0.0.
235 *
236 * \sa SDL_Log
237 * \sa SDL_LogCritical
238 * \sa SDL_LogDebug
239 * \sa SDL_LogError
240 * \sa SDL_LogMessage
241 * \sa SDL_LogMessageV
242 * \sa SDL_LogVerbose
243 * \sa SDL_LogWarn
244 */
245extern DECLSPEC void SDLCALL SDL_LogInfo(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(2);
246
247/**
248 * Log a message with SDL_LOG_PRIORITY_WARN.
249 *
250 * \param category the category of the message
251 * \param fmt a printf() style message format string
252 * \param ... additional parameters matching % tokens in the **fmt** string,
253 * if any
254 *
255 * \since This function is available since SDL 2.0.0.
256 *
257 * \sa SDL_Log
258 * \sa SDL_LogCritical
259 * \sa SDL_LogDebug
260 * \sa SDL_LogError
261 * \sa SDL_LogInfo
262 * \sa SDL_LogMessage
263 * \sa SDL_LogMessageV
264 * \sa SDL_LogVerbose
265 */
266extern DECLSPEC void SDLCALL SDL_LogWarn(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(2);
267
268/**
269 * Log a message with SDL_LOG_PRIORITY_ERROR.
270 *
271 * \param category the category of the message
272 * \param fmt a printf() style message format string
273 * \param ... additional parameters matching % tokens in the **fmt** string,
274 * if any
275 *
276 * \since This function is available since SDL 2.0.0.
277 *
278 * \sa SDL_Log
279 * \sa SDL_LogCritical
280 * \sa SDL_LogDebug
281 * \sa SDL_LogInfo
282 * \sa SDL_LogMessage
283 * \sa SDL_LogMessageV
284 * \sa SDL_LogVerbose
285 * \sa SDL_LogWarn
286 */
287extern DECLSPEC void SDLCALL SDL_LogError(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(2);
288
289/**
290 * Log a message with SDL_LOG_PRIORITY_CRITICAL.
291 *
292 * \param category the category of the message
293 * \param fmt a printf() style message format string
294 * \param ... additional parameters matching % tokens in the **fmt** string,
295 * if any
296 *
297 * \since This function is available since SDL 2.0.0.
298 *
299 * \sa SDL_Log
300 * \sa SDL_LogDebug
301 * \sa SDL_LogError
302 * \sa SDL_LogInfo
303 * \sa SDL_LogMessage
304 * \sa SDL_LogMessageV
305 * \sa SDL_LogVerbose
306 * \sa SDL_LogWarn
307 */
308extern DECLSPEC void SDLCALL SDL_LogCritical(int category, SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(2);
309
310/**
311 * Log a message with the specified category and priority.
312 *
313 * \param category the category of the message
314 * \param priority the priority of the message
315 * \param fmt a printf() style message format string
316 * \param ... additional parameters matching % tokens in the **fmt** string,
317 * if any
318 *
319 * \since This function is available since SDL 2.0.0.
320 *
321 * \sa SDL_Log
322 * \sa SDL_LogCritical
323 * \sa SDL_LogDebug
324 * \sa SDL_LogError
325 * \sa SDL_LogInfo
326 * \sa SDL_LogMessageV
327 * \sa SDL_LogVerbose
328 * \sa SDL_LogWarn
329 */
330extern DECLSPEC void SDLCALL SDL_LogMessage(int category,
331 SDL_LogPriority priority,
332 SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(3);
333
334/**
335 * Log a message with the specified category and priority.
336 *
337 * \param category the category of the message
338 * \param priority the priority of the message
339 * \param fmt a printf() style message format string
340 * \param ap a variable argument list
341 *
342 * \since This function is available since SDL 2.0.0.
343 *
344 * \sa SDL_Log
345 * \sa SDL_LogCritical
346 * \sa SDL_LogDebug
347 * \sa SDL_LogError
348 * \sa SDL_LogInfo
349 * \sa SDL_LogMessage
350 * \sa SDL_LogVerbose
351 * \sa SDL_LogWarn
352 */
353extern DECLSPEC void SDLCALL SDL_LogMessageV(int category,
354 SDL_LogPriority priority,
355 SDL_PRINTF_FORMAT_STRING const char *fmt, va_list ap) SDL_PRINTF_VARARG_FUNCV(3);
356
357/**
358 * The prototype for the log output callback function.
359 *
360 * This function is called by SDL when there is new text to be logged.
361 *
362 * \param userdata what was passed as `userdata` to SDL_LogSetOutputFunction()
363 * \param category the category of the message
364 * \param priority the priority of the message
365 * \param message the message being output
366 */
367typedef void (SDLCALL *SDL_LogOutputFunction)(void *userdata, int category, SDL_LogPriority priority, const char *message);
368
369/**
370 * Get the current log output function.
371 *
372 * \param callback an SDL_LogOutputFunction filled in with the current log
373 * callback
374 * \param userdata a pointer filled in with the pointer that is passed to
375 * `callback`
376 *
377 * \since This function is available since SDL 2.0.0.
378 *
379 * \sa SDL_LogSetOutputFunction
380 */
381extern DECLSPEC void SDLCALL SDL_LogGetOutputFunction(SDL_LogOutputFunction *callback, void **userdata);
382
383/**
384 * Replace the default log output function with one of your own.
385 *
386 * \param callback an SDL_LogOutputFunction to call instead of the default
387 * \param userdata a pointer that is passed to `callback`
388 *
389 * \since This function is available since SDL 2.0.0.
390 *
391 * \sa SDL_LogGetOutputFunction
392 */
393extern DECLSPEC void SDLCALL SDL_LogSetOutputFunction(SDL_LogOutputFunction callback, void *userdata);
394
395
396/* Ends C function definitions when using C++ */
397#ifdef __cplusplus
398}
399#endif
400#include "close_code.h"
401
402#endif /* SDL_log_h_ */
403
404/* vi: set ts=4 sw=4 expandtab: */