Repository navigation
Expand file tree
/
Copy pathSDL_utils.c
More file actions
582 lines (516 loc) · 17 KB
/
Copy pathSDL_utils.c
File metadata and controls
582 lines (516 loc) · 17 KB
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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
/*
Simple DirectMedia Layer
Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "SDL_internal.h"
#if defined(HAVE_GETHOSTNAME) && !defined(SDL_PLATFORM_WINDOWS)
#include <unistd.h>
#endif
#include "joystick/SDL_joystick_c.h" // For SDL_GetGamepadTypeFromVIDPID()
// Common utility functions that aren't in the public API
int SDL_powerof2(int x)
{
int value;
if (x <= 0) {
// Return some sane value - we shouldn't hit this in our use cases
return 1;
}
// This trick works for 32-bit values
{
SDL_COMPILE_TIME_ASSERT(SDL_powerof2, sizeof(x) == sizeof(Uint32));
}
value = x;
value -= 1;
value |= value >> 1;
value |= value >> 2;
value |= value >> 4;
value |= value >> 8;
value |= value >> 16;
value += 1;
return value;
}
Uint32 SDL_CalculateGCD(Uint32 a, Uint32 b)
{
if (b == 0) {
return a;
}
return SDL_CalculateGCD(b, (a % b));
}
// Algorithm adapted with thanks from John Cook's blog post:
// http://www.johndcook.com/blog/2010/10/20/best-rational-approximation
void SDL_CalculateFraction(float x, int *numerator, int *denominator)
{
const int N = 1000;
int a = 0, b = 1;
int c = 1, d = 0;
while (b <= N && d <= N) {
float mediant = (float)(a + c) / (b + d);
if (x == mediant) {
if (b + d <= N) {
*numerator = a + c;
*denominator = b + d;
} else if (d > b) {
*numerator = c;
*denominator = d;
} else {
*numerator = a;
*denominator = b;
}
return;
} else if (x > mediant) {
a = a + c;
b = b + d;
} else {
c = a + c;
d = b + d;
}
}
if (b > N) {
*numerator = c;
*denominator = d;
} else {
*numerator = a;
*denominator = b;
}
}
bool SDL_startswith(const char *string, const char *prefix)
{
if (SDL_strncmp(string, prefix, SDL_strlen(prefix)) == 0) {
return true;
}
return false;
}
bool SDL_endswith(const char *string, const char *suffix)
{
size_t string_length = string ? SDL_strlen(string) : 0;
size_t suffix_length = suffix ? SDL_strlen(suffix) : 0;
if (suffix_length > 0 && suffix_length <= string_length) {
if (SDL_memcmp(string + string_length - suffix_length, suffix, suffix_length) == 0) {
return true;
}
}
return false;
}
SDL_COMPILE_TIME_ASSERT(sizeof_object_id, sizeof(int) == sizeof(Uint32));
Uint32 SDL_GetNextObjectID(void)
{
static SDL_AtomicInt last_id;
Uint32 id = (Uint32)SDL_AtomicIncRef(&last_id) + 1;
if (id == 0) {
id = (Uint32)SDL_AtomicIncRef(&last_id) + 1;
}
return id;
}
static SDL_InitState SDL_objects_init;
static SDL_HashTable *SDL_objects;
bool SDL_object_validation = true;
static void SDLCALL SDL_InvalidParamChecksChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
{
bool validation_enabled = true;
#ifndef OBJECT_VALIDATION_REQUIRED
if (hint) {
switch (*hint) {
case '0':
case '1':
validation_enabled = false;
break;
case '2':
validation_enabled = true;
break;
default:
break;
}
}
#endif // !OBJECT_VALIDATION_REQUIRED
SDL_object_validation = validation_enabled;
}
static Uint32 SDLCALL SDL_HashObject(void *unused, const void *key)
{
return (Uint32)(uintptr_t)key;
}
static bool SDL_KeyMatchObject(void *unused, const void *a, const void *b)
{
return (a == b);
}
void SDL_SetObjectValid(void *object, SDL_ObjectType type, bool valid)
{
SDL_assert(object != NULL);
if (SDL_ShouldInit(&SDL_objects_init)) {
SDL_objects = SDL_CreateHashTable(0, true, SDL_HashObject, SDL_KeyMatchObject, NULL, NULL);
const bool initialized = (SDL_objects != NULL);
SDL_SetInitialized(&SDL_objects_init, initialized);
if (!initialized) {
return;
}
SDL_AddHintCallback(SDL_HINT_INVALID_PARAM_CHECKS, SDL_InvalidParamChecksChanged, NULL);
}
if (valid) {
SDL_InsertIntoHashTable(SDL_objects, object, (void *)(uintptr_t)type, true);
} else {
SDL_RemoveFromHashTable(SDL_objects, object);
}
}
bool SDL_FindObject(void *object, SDL_ObjectType type)
{
const void *object_type;
if (!SDL_FindInHashTable(SDL_objects, object, &object_type)) {
return false;
}
return (((SDL_ObjectType)(uintptr_t)object_type) == type);
}
typedef struct GetOneObjectData
{
const SDL_ObjectType type;
void **objects;
const int count;
int num_objects;
} GetOneObjectData;
static bool SDLCALL GetOneObject(void *userdata, const SDL_HashTable *table, const void *object, const void *object_type)
{
GetOneObjectData *data = (GetOneObjectData *) userdata;
if ((SDL_ObjectType)(uintptr_t)object_type == data->type) {
if (data->num_objects < data->count) {
data->objects[data->num_objects] = (void *)object;
}
++data->num_objects;
}
return true; // keep iterating.
}
int SDL_GetObjects(SDL_ObjectType type, void **objects, int count)
{
GetOneObjectData data = { type, objects, count, 0 };
SDL_IterateHashTable(SDL_objects, GetOneObject, &data);
return data.num_objects;
}
static bool SDLCALL LogOneLeakedObject(void *userdata, const SDL_HashTable *table, const void *object, const void *object_type)
{
const char *type = "unknown object";
switch ((SDL_ObjectType)(uintptr_t)object_type) {
#define SDLOBJTYPECASE(typ, name) case SDL_OBJECT_TYPE_##typ: type = name; break
SDLOBJTYPECASE(WINDOW, "SDL_Window");
SDLOBJTYPECASE(RENDERER, "SDL_Renderer");
SDLOBJTYPECASE(TEXTURE, "SDL_Texture");
SDLOBJTYPECASE(JOYSTICK, "SDL_Joystick");
SDLOBJTYPECASE(GAMEPAD, "SDL_Gamepad");
SDLOBJTYPECASE(HAPTIC, "SDL_Haptic");
SDLOBJTYPECASE(SENSOR, "SDL_Sensor");
SDLOBJTYPECASE(HIDAPI_DEVICE, "hidapi device");
SDLOBJTYPECASE(HIDAPI_JOYSTICK, "hidapi joystick");
SDLOBJTYPECASE(THREAD, "thread");
SDLOBJTYPECASE(TRAY, "SDL_Tray");
#undef SDLOBJTYPECASE
default: break;
}
SDL_LogDebug(SDL_LOG_CATEGORY_SYSTEM, "Leaked %s (%p)", type, object);
return true; // keep iterating.
}
void SDL_SetObjectsInvalid(void)
{
if (SDL_ShouldQuit(&SDL_objects_init)) {
// Log any leaked objects
SDL_IterateHashTable(SDL_objects, LogOneLeakedObject, NULL);
SDL_DestroyHashTable(SDL_objects);
SDL_objects = NULL;
SDL_SetInitialized(&SDL_objects_init, false);
SDL_RemoveHintCallback(SDL_HINT_INVALID_PARAM_CHECKS, SDL_InvalidParamChecksChanged, NULL);
}
}
static int SDL_URIDecode(const char *src, char *dst, int len)
{
int ri, wi, di;
char decode = '\0';
if (!src || !dst || len < 0) {
return -1;
}
if (len == 0) {
len = (int)SDL_strlen(src);
}
for (ri = 0, wi = 0, di = 0; ri < len && wi < len; ri += 1) {
if (di == 0) {
// start decoding
if (src[ri] == '%') {
decode = '\0';
di += 1;
continue;
}
// normal write
dst[wi] = src[ri];
wi += 1;
} else if (di == 1 || di == 2) {
char off = '\0';
char isa = src[ri] >= 'a' && src[ri] <= 'f';
char isA = src[ri] >= 'A' && src[ri] <= 'F';
char isn = src[ri] >= '0' && src[ri] <= '9';
if (!(isa || isA || isn)) {
// not a hexadecimal
int sri;
for (sri = ri - di; sri <= ri; sri += 1) {
dst[wi] = src[sri];
wi += 1;
}
di = 0;
continue;
}
// itsy bitsy magicsy
if (isn) {
off = 0 - '0';
} else if (isa) {
off = 10 - 'a';
} else if (isA) {
off = 10 - 'A';
}
decode |= (src[ri] + off) << (2 - di) * 4;
if (di == 2) {
dst[wi] = decode;
wi += 1;
di = 0;
} else {
di += 1;
}
}
}
dst[wi] = '\0';
return wi;
}
int SDL_URIToLocal(const char *src, char *dst)
{
if (SDL_memcmp(src, "file:/", 6) == 0) {
src += 6; // local file?
} else if (SDL_strstr(src, ":/") != NULL) {
return -1; // wrong scheme
}
bool local = src[0] != '/' || (src[0] != '\0' && src[1] == '/');
// Check the hostname, if present. RFC 3986 states that the hostname component of a URI is not case-sensitive.
if (!local && src[0] == '/' && src[2] != '/') {
char *hostname_end = SDL_strchr(src + 1, '/');
if (hostname_end) {
const size_t src_len = hostname_end - (src + 1);
size_t hostname_len;
#if defined(HAVE_GETHOSTNAME) && !defined(SDL_PLATFORM_WINDOWS)
char hostname[257];
if (gethostname(hostname, 255) == 0) {
hostname[256] = '\0';
hostname_len = SDL_strlen(hostname);
if (hostname_len == src_len && SDL_strncasecmp(src + 1, hostname, src_len) == 0) {
src = hostname_end + 1;
local = true;
}
}
#endif
if (!local) {
static const char *localhost = "localhost";
hostname_len = SDL_strlen(localhost);
if (hostname_len == src_len && SDL_strncasecmp(src + 1, localhost, src_len) == 0) {
src = hostname_end + 1;
local = true;
}
}
}
}
if (local) {
// Convert URI escape sequences to real characters
if (src[0] == '/') {
src++;
} else {
src--;
}
return SDL_URIDecode(src, dst, 0);
}
return -1;
}
// This is a set of per-thread persistent strings that we can return from the SDL API.
// This is used for short strings that might persist past the lifetime of the object
// they are related to.
static SDL_TLSID SDL_string_storage;
static void SDL_FreePersistentStrings( void *value )
{
SDL_HashTable *strings = (SDL_HashTable *)value;
SDL_DestroyHashTable(strings);
}
const char *SDL_GetPersistentString(const char *string)
{
if (!string) {
return NULL;
}
if (!*string) {
return "";
}
SDL_HashTable *strings = (SDL_HashTable *)SDL_GetTLS(&SDL_string_storage);
if (!strings) {
strings = SDL_CreateHashTable(0, false, SDL_HashString, SDL_KeyMatchString, SDL_DestroyHashValue, NULL);
if (!strings) {
return NULL;
}
SDL_SetTLS(&SDL_string_storage, strings, SDL_FreePersistentStrings);
}
const char *result;
if (!SDL_FindInHashTable(strings, string, (const void **)&result)) {
char *new_string = SDL_strdup(string);
if (!new_string) {
return NULL;
}
// If the hash table insert fails, at least we can return the string we allocated
SDL_InsertIntoHashTable(strings, new_string, new_string, false);
result = new_string;
}
return result;
}
static int PrefixMatch(const char *a, const char *b)
{
int matchlen = 0;
// Fixes the "HORI HORl Taiko No Tatsujin Drum Controller"
if (SDL_strncmp(a, "HORI ", 5) == 0 && SDL_strncmp(b, "HORl ", 5) == 0) {
return 5;
}
while (*a && *b) {
if (SDL_tolower((unsigned char)*a++) == SDL_tolower((unsigned char)*b++)) {
++matchlen;
} else {
break;
}
}
return matchlen;
}
char *SDL_CreateDeviceName(Uint16 vendor, Uint16 product, const char *vendor_name, const char *product_name, const char *default_name)
{
static struct
{
const char *prefix;
const char *replacement;
} replacements[] = {
{ "8BitDo Tech Ltd", "8BitDo" },
{ "ASTRO Gaming", "ASTRO" },
{ "Bensussen Deutsch & Associates,Inc.(BDA)", "BDA" },
{ "Guangzhou Chicken Run Network Technology Co., Ltd.", "GameSir" },
{ "HORI CO.,LTD.", "HORI" },
{ "HORI CO.,LTD", "HORI" },
{ "Mad Catz Inc.", "Mad Catz" },
{ "Nintendo Co., Ltd.", "Nintendo" },
{ "NVIDIA Corporation ", "" },
{ "Performance Designed Products", "PDP" },
{ "QANBA USA, LLC", "Qanba" },
{ "QANBA USA,LLC", "Qanba" },
{ "Unknown ", "" },
};
char *name = NULL;
size_t i, len;
if (!vendor_name) {
vendor_name = "";
}
if (!product_name) {
product_name = "";
}
while (*vendor_name == ' ') {
++vendor_name;
}
while (*product_name == ' ') {
++product_name;
}
if (*vendor_name && *product_name) {
len = (SDL_strlen(vendor_name) + 1 + SDL_strlen(product_name) + 1);
name = (char *)SDL_malloc(len);
if (name) {
(void)SDL_snprintf(name, len, "%s %s", vendor_name, product_name);
}
} else if (*product_name) {
name = SDL_strdup(product_name);
} else if (vendor || product) {
// Couldn't find a controller name, try to give it one based on device type
switch (SDL_GetGamepadTypeFromVIDPID(vendor, product, NULL, true)) {
case SDL_GAMEPAD_TYPE_XBOX360:
name = SDL_strdup("Xbox 360 Controller");
break;
case SDL_GAMEPAD_TYPE_XBOXONE:
name = SDL_strdup("Xbox One Controller");
break;
case SDL_GAMEPAD_TYPE_PS3:
name = SDL_strdup("PS3 Controller");
break;
case SDL_GAMEPAD_TYPE_PS4:
name = SDL_strdup("PS4 Controller");
break;
case SDL_GAMEPAD_TYPE_PS5:
name = SDL_strdup("DualSense Wireless Controller");
break;
case SDL_GAMEPAD_TYPE_NINTENDO_SWITCH_PRO:
name = SDL_strdup("Nintendo Switch Pro Controller");
break;
default:
len = (6 + 1 + 6 + 1);
name = (char *)SDL_malloc(len);
if (name) {
(void)SDL_snprintf(name, len, "0x%.4x/0x%.4x", vendor, product);
}
break;
}
} else if (default_name) {
name = SDL_strdup(default_name);
}
if (!name) {
return NULL;
}
// Trim trailing whitespace
for (len = SDL_strlen(name); (len > 0 && name[len - 1] == ' '); --len) {
// continue
}
name[len] = '\0';
// Compress duplicate spaces
for (i = 0; i < (len - 1);) {
if (name[i] == ' ' && name[i + 1] == ' ') {
SDL_memmove(&name[i], &name[i + 1], (len - i));
--len;
} else {
++i;
}
}
// Perform any manufacturer replacements
for (i = 0; i < SDL_arraysize(replacements); ++i) {
size_t prefixlen = SDL_strlen(replacements[i].prefix);
if (SDL_strncasecmp(name, replacements[i].prefix, prefixlen) == 0) {
size_t replacementlen = SDL_strlen(replacements[i].replacement);
if (replacementlen <= prefixlen) {
SDL_memcpy(name, replacements[i].replacement, replacementlen);
SDL_memmove(name + replacementlen, name + prefixlen, (len - prefixlen) + 1);
len -= (prefixlen - replacementlen);
} else {
// FIXME: Need to handle the expand case by reallocating the string
}
break;
}
}
/* Remove duplicate manufacturer or product in the name
* e.g. Razer Razer Raiju Tournament Edition Wired
*/
for (i = 1; i < (len - 1); ++i) {
int matchlen = PrefixMatch(name, &name[i]);
while (matchlen > 0) {
if (name[matchlen] == ' ' || name[matchlen] == '-') {
SDL_memmove(name, name + matchlen + 1, len - matchlen);
break;
}
--matchlen;
}
if (matchlen > 0) {
// We matched the manufacturer's name and removed it
break;
}
}
return name;
}
void SDL_DebugLogBackend(const char *subsystem, const char *backend)
{
SDL_LogDebug(SDL_LOG_CATEGORY_SYSTEM, "SDL chose %s backend '%s'", subsystem, backend);
}