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author Paper <paper@tflc.us>
date Mon, 05 Jan 2026 02:15:46 -0500
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0:e9bb126753e7 1:20d02a178406
1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2025 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 * Fuzzer functions of SDL test framework.
24 *
25 * This code is a part of the SDL test library, not the main SDL library.
26 */
27
28 /*
29
30 Data generators for fuzzing test data in a reproducible way.
31
32 */
33
34 #ifndef SDL_test_fuzzer_h_
35 #define SDL_test_fuzzer_h_
36
37 #include <SDL3/SDL_stdinc.h>
38
39 #include <SDL3/SDL_begin_code.h>
40 /* Set up for C function definitions, even when using C++ */
41 #ifdef __cplusplus
42 extern "C" {
43 #endif
44
45 /*
46 Based on GSOC code by Markus Kauppila <markus.kauppila@gmail.com>
47 */
48
49 /**
50 * Note: The fuzzer implementation uses a static instance of random context
51 * internally which makes it thread-UNsafe.
52 */
53
54 /**
55 * Initializes the fuzzer for a test
56 *
57 * \param execKey Execution "Key" that initializes the random number generator uniquely for the test.
58 *
59 */
60 void SDLCALL SDLTest_FuzzerInit(Uint64 execKey);
61
62 /**
63 * Returns a random Uint8
64 *
65 * \returns a generated integer
66 */
67 Uint8 SDLCALL SDLTest_RandomUint8(void);
68
69 /**
70 * Returns a random Sint8
71 *
72 * \returns a generated signed integer
73 */
74 Sint8 SDLCALL SDLTest_RandomSint8(void);
75
76 /**
77 * Returns a random Uint16
78 *
79 * \returns a generated integer
80 */
81 Uint16 SDLCALL SDLTest_RandomUint16(void);
82
83 /**
84 * Returns a random Sint16
85 *
86 * \returns a generated signed integer
87 */
88 Sint16 SDLCALL SDLTest_RandomSint16(void);
89
90 /**
91 * Returns a random integer
92 *
93 * \returns a generated integer
94 */
95 Sint32 SDLCALL SDLTest_RandomSint32(void);
96
97 /**
98 * Returns a random positive integer
99 *
100 * \returns a generated integer
101 */
102 Uint32 SDLCALL SDLTest_RandomUint32(void);
103
104 /**
105 * Returns random Uint64.
106 *
107 * \returns a generated integer
108 */
109 Uint64 SDLTest_RandomUint64(void);
110
111 /**
112 * Returns random Sint64.
113 *
114 * \returns a generated signed integer
115 */
116 Sint64 SDLCALL SDLTest_RandomSint64(void);
117
118 /**
119 * \returns a random float in range [0.0 - 1.0]
120 */
121 float SDLCALL SDLTest_RandomUnitFloat(void);
122
123 /**
124 * \returns a random double in range [0.0 - 1.0]
125 */
126 double SDLCALL SDLTest_RandomUnitDouble(void);
127
128 /**
129 * \returns a random float.
130 *
131 */
132 float SDLCALL SDLTest_RandomFloat(void);
133
134 /**
135 * \returns a random double.
136 *
137 */
138 double SDLCALL SDLTest_RandomDouble(void);
139
140 /**
141 * Returns a random boundary value for Uint8 within the given boundaries.
142 * Boundaries are inclusive, see the usage examples below. If validDomain
143 * is true, the function will only return valid boundaries, otherwise non-valid
144 * boundaries are also possible.
145 * If boundary1 > boundary2, the values are swapped
146 *
147 * Usage examples:
148 * RandomUint8BoundaryValue(10, 20, true) returns 10, 11, 19 or 20
149 * RandomUint8BoundaryValue(1, 20, false) returns 0 or 21
150 * RandomUint8BoundaryValue(0, 99, false) returns 100
151 * RandomUint8BoundaryValue(0, 255, false) returns 0 (error set)
152 *
153 * \param boundary1 Lower boundary limit
154 * \param boundary2 Upper boundary limit
155 * \param validDomain Should the generated boundary be valid (=within the bounds) or not?
156 *
157 * \returns a random boundary value for the given range and domain or 0 with error set
158 */
159 Uint8 SDLCALL SDLTest_RandomUint8BoundaryValue(Uint8 boundary1, Uint8 boundary2, bool validDomain);
160
161 /**
162 * Returns a random boundary value for Uint16 within the given boundaries.
163 * Boundaries are inclusive, see the usage examples below. If validDomain
164 * is true, the function will only return valid boundaries, otherwise non-valid
165 * boundaries are also possible.
166 * If boundary1 > boundary2, the values are swapped
167 *
168 * Usage examples:
169 * RandomUint16BoundaryValue(10, 20, true) returns 10, 11, 19 or 20
170 * RandomUint16BoundaryValue(1, 20, false) returns 0 or 21
171 * RandomUint16BoundaryValue(0, 99, false) returns 100
172 * RandomUint16BoundaryValue(0, 0xFFFF, false) returns 0 (error set)
173 *
174 * \param boundary1 Lower boundary limit
175 * \param boundary2 Upper boundary limit
176 * \param validDomain Should the generated boundary be valid (=within the bounds) or not?
177 *
178 * \returns a random boundary value for the given range and domain or 0 with error set
179 */
180 Uint16 SDLCALL SDLTest_RandomUint16BoundaryValue(Uint16 boundary1, Uint16 boundary2, bool validDomain);
181
182 /**
183 * Returns a random boundary value for Uint32 within the given boundaries.
184 * Boundaries are inclusive, see the usage examples below. If validDomain
185 * is true, the function will only return valid boundaries, otherwise non-valid
186 * boundaries are also possible.
187 * If boundary1 > boundary2, the values are swapped
188 *
189 * Usage examples:
190 * RandomUint32BoundaryValue(10, 20, true) returns 10, 11, 19 or 20
191 * RandomUint32BoundaryValue(1, 20, false) returns 0 or 21
192 * RandomUint32BoundaryValue(0, 99, false) returns 100
193 * RandomUint32BoundaryValue(0, 0xFFFFFFFF, false) returns 0 (with error set)
194 *
195 * \param boundary1 Lower boundary limit
196 * \param boundary2 Upper boundary limit
197 * \param validDomain Should the generated boundary be valid (=within the bounds) or not?
198 *
199 * \returns a random boundary value for the given range and domain or 0 with error set
200 */
201 Uint32 SDLCALL SDLTest_RandomUint32BoundaryValue(Uint32 boundary1, Uint32 boundary2, bool validDomain);
202
203 /**
204 * Returns a random boundary value for Uint64 within the given boundaries.
205 * Boundaries are inclusive, see the usage examples below. If validDomain
206 * is true, the function will only return valid boundaries, otherwise non-valid
207 * boundaries are also possible.
208 * If boundary1 > boundary2, the values are swapped
209 *
210 * Usage examples:
211 * RandomUint64BoundaryValue(10, 20, true) returns 10, 11, 19 or 20
212 * RandomUint64BoundaryValue(1, 20, false) returns 0 or 21
213 * RandomUint64BoundaryValue(0, 99, false) returns 100
214 * RandomUint64BoundaryValue(0, 0xFFFFFFFFFFFFFFFF, false) returns 0 (with error set)
215 *
216 * \param boundary1 Lower boundary limit
217 * \param boundary2 Upper boundary limit
218 * \param validDomain Should the generated boundary be valid (=within the bounds) or not?
219 *
220 * \returns a random boundary value for the given range and domain or 0 with error set
221 */
222 Uint64 SDLCALL SDLTest_RandomUint64BoundaryValue(Uint64 boundary1, Uint64 boundary2, bool validDomain);
223
224 /**
225 * Returns a random boundary value for Sint8 within the given boundaries.
226 * Boundaries are inclusive, see the usage examples below. If validDomain
227 * is true, the function will only return valid boundaries, otherwise non-valid
228 * boundaries are also possible.
229 * If boundary1 > boundary2, the values are swapped
230 *
231 * Usage examples:
232 * RandomSint8BoundaryValue(-10, 20, true) returns -11, -10, 19 or 20
233 * RandomSint8BoundaryValue(-100, -10, false) returns -101 or -9
234 * RandomSint8BoundaryValue(SINT8_MIN, 99, false) returns 100
235 * RandomSint8BoundaryValue(SINT8_MIN, SINT8_MAX, false) returns SINT8_MIN (== error value) with error set
236 *
237 * \param boundary1 Lower boundary limit
238 * \param boundary2 Upper boundary limit
239 * \param validDomain Should the generated boundary be valid (=within the bounds) or not?
240 *
241 * \returns a random boundary value for the given range and domain or SINT8_MIN with error set
242 */
243 Sint8 SDLCALL SDLTest_RandomSint8BoundaryValue(Sint8 boundary1, Sint8 boundary2, bool validDomain);
244
245 /**
246 * Returns a random boundary value for Sint16 within the given boundaries.
247 * Boundaries are inclusive, see the usage examples below. If validDomain
248 * is true, the function will only return valid boundaries, otherwise non-valid
249 * boundaries are also possible.
250 * If boundary1 > boundary2, the values are swapped
251 *
252 * Usage examples:
253 * RandomSint16BoundaryValue(-10, 20, true) returns -11, -10, 19 or 20
254 * RandomSint16BoundaryValue(-100, -10, false) returns -101 or -9
255 * RandomSint16BoundaryValue(SINT16_MIN, 99, false) returns 100
256 * RandomSint16BoundaryValue(SINT16_MIN, SINT16_MAX, false) returns SINT16_MIN (== error value) with error set
257 *
258 * \param boundary1 Lower boundary limit
259 * \param boundary2 Upper boundary limit
260 * \param validDomain Should the generated boundary be valid (=within the bounds) or not?
261 *
262 * \returns a random boundary value for the given range and domain or SINT16_MIN with error set
263 */
264 Sint16 SDLCALL SDLTest_RandomSint16BoundaryValue(Sint16 boundary1, Sint16 boundary2, bool validDomain);
265
266 /**
267 * Returns a random boundary value for Sint32 within the given boundaries.
268 * Boundaries are inclusive, see the usage examples below. If validDomain
269 * is true, the function will only return valid boundaries, otherwise non-valid
270 * boundaries are also possible.
271 * If boundary1 > boundary2, the values are swapped
272 *
273 * Usage examples:
274 * RandomSint32BoundaryValue(-10, 20, true) returns -11, -10, 19 or 20
275 * RandomSint32BoundaryValue(-100, -10, false) returns -101 or -9
276 * RandomSint32BoundaryValue(SINT32_MIN, 99, false) returns 100
277 * RandomSint32BoundaryValue(SINT32_MIN, SINT32_MAX, false) returns SINT32_MIN (== error value)
278 *
279 * \param boundary1 Lower boundary limit
280 * \param boundary2 Upper boundary limit
281 * \param validDomain Should the generated boundary be valid (=within the bounds) or not?
282 *
283 * \returns a random boundary value for the given range and domain or SINT32_MIN with error set
284 */
285 Sint32 SDLCALL SDLTest_RandomSint32BoundaryValue(Sint32 boundary1, Sint32 boundary2, bool validDomain);
286
287 /**
288 * Returns a random boundary value for Sint64 within the given boundaries.
289 * Boundaries are inclusive, see the usage examples below. If validDomain
290 * is true, the function will only return valid boundaries, otherwise non-valid
291 * boundaries are also possible.
292 * If boundary1 > boundary2, the values are swapped
293 *
294 * Usage examples:
295 * RandomSint64BoundaryValue(-10, 20, true) returns -11, -10, 19 or 20
296 * RandomSint64BoundaryValue(-100, -10, false) returns -101 or -9
297 * RandomSint64BoundaryValue(SINT64_MIN, 99, false) returns 100
298 * RandomSint64BoundaryValue(SINT64_MIN, SINT64_MAX, false) returns SINT64_MIN (== error value) and error set
299 *
300 * \param boundary1 Lower boundary limit
301 * \param boundary2 Upper boundary limit
302 * \param validDomain Should the generated boundary be valid (=within the bounds) or not?
303 *
304 * \returns a random boundary value for the given range and domain or SINT64_MIN with error set
305 */
306 Sint64 SDLCALL SDLTest_RandomSint64BoundaryValue(Sint64 boundary1, Sint64 boundary2, bool validDomain);
307
308 /**
309 * Returns integer in range [min, max] (inclusive).
310 * Min and max values can be negative values.
311 * If Max in smaller than min, then the values are swapped.
312 * Min and max are the same value, that value will be returned.
313 *
314 * \param min Minimum inclusive value of returned random number
315 * \param max Maximum inclusive value of returned random number
316 *
317 * \returns a generated random integer in range
318 */
319 Sint32 SDLCALL SDLTest_RandomIntegerInRange(Sint32 min, Sint32 max);
320
321 /**
322 * Generates random null-terminated string. The minimum length for
323 * the string is 1 character, maximum length for the string is 255
324 * characters and it can contain ASCII characters from 32 to 126.
325 *
326 * Note: Returned string needs to be deallocated.
327 *
328 * \returns a newly allocated random string; or NULL if length was invalid or string could not be allocated.
329 */
330 char * SDLCALL SDLTest_RandomAsciiString(void);
331
332 /**
333 * Generates random null-terminated string. The maximum length for
334 * the string is defined by the maxLength parameter.
335 * String can contain ASCII characters from 32 to 126.
336 *
337 * Note: Returned string needs to be deallocated.
338 *
339 * \param maxLength The maximum length of the generated string.
340 *
341 * \returns a newly allocated random string; or NULL if maxLength was invalid or string could not be allocated.
342 */
343 char * SDLCALL SDLTest_RandomAsciiStringWithMaximumLength(int maxLength);
344
345 /**
346 * Generates random null-terminated string. The length for
347 * the string is defined by the size parameter.
348 * String can contain ASCII characters from 32 to 126.
349 *
350 * Note: Returned string needs to be deallocated.
351 *
352 * \param size The length of the generated string
353 *
354 * \returns a newly allocated random string; or NULL if size was invalid or string could not be allocated.
355 */
356 char * SDLCALL SDLTest_RandomAsciiStringOfSize(int size);
357
358 /**
359 * Get the invocation count for the fuzzer since last ...FuzzerInit.
360 *
361 * \returns the invocation count.
362 */
363 int SDLCALL SDLTest_GetFuzzerInvocationCount(void);
364
365 /* Ends C function definitions when using C++ */
366 #ifdef __cplusplus
367 }
368 #endif
369 #include <SDL3/SDL_close_code.h>
370
371 #endif /* SDL_test_fuzzer_h_ */