This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
/
SDL_joystick.c
827 lines (707 loc) · 19.9 KB
1
2
/*
Simple DirectMedia Layer
3
Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
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_config.h"
/* This is the joystick API for Simple DirectMedia Layer */
#include "SDL_events.h"
#include "SDL_sysjoystick.h"
#include "SDL_assert.h"
28
#include "SDL_hints.h"
29
30
31
32
33
#if !SDL_EVENTS_DISABLED
#include "../events/SDL_events_c.h"
#endif
34
35
static SDL_Joystick *SDL_joysticks = NULL;
static SDL_Joystick *SDL_updating_joystick = NULL;
36
37
38
39
40
41
42
43
int
SDL_JoystickInit(void)
{
int status;
status = SDL_SYS_JoystickInit();
if (status >= 0) {
44
status = 0;
45
46
47
48
49
50
51
52
53
54
}
return (status);
}
/*
* Count the number of joysticks attached to the system
*/
int
SDL_NumJoysticks(void)
{
55
return SDL_SYS_NumJoysticks();
56
57
58
59
60
61
}
/*
* Get the implementation dependent name of a joystick
*/
const char *
62
SDL_JoystickNameForIndex(int device_index)
63
{
64
65
if ((device_index < 0) || (device_index >= SDL_NumJoysticks())) {
SDL_SetError("There are %d joysticks available", SDL_NumJoysticks());
66
67
return (NULL);
}
68
return (SDL_SYS_JoystickNameForDeviceIndex(device_index));
69
70
71
72
73
74
75
76
77
78
79
80
81
}
/*
* Open a joystick for use - the index passed as an argument refers to
* the N'th joystick on the system. This index is the value which will
* identify this joystick in future joystick events.
*
* This function returns a joystick identifier, or NULL if an error occurred.
*/
SDL_Joystick *
SDL_JoystickOpen(int device_index)
{
SDL_Joystick *joystick;
82
83
SDL_Joystick *joysticklist;
const char *joystickname = NULL;
84
85
86
if ((device_index < 0) || (device_index >= SDL_NumJoysticks())) {
SDL_SetError("There are %d joysticks available", SDL_NumJoysticks());
87
88
89
return (NULL);
}
90
91
92
93
94
95
96
97
98
99
100
101
joysticklist = SDL_joysticks;
/* If the joystick is already open, return it
* it is important that we have a single joystick * for each instance id
*/
while ( joysticklist )
{
if ( SDL_SYS_GetInstanceIdOfDeviceIndex(device_index) == joysticklist->instance_id ) {
joystick = joysticklist;
++joystick->ref_count;
return (joystick);
}
joysticklist = joysticklist->next;
102
103
104
105
106
107
108
109
110
111
}
/* Create and initialize the joystick */
joystick = (SDL_Joystick *) SDL_malloc((sizeof *joystick));
if (joystick == NULL) {
SDL_OutOfMemory();
return NULL;
}
SDL_memset(joystick, 0, (sizeof *joystick));
112
if (SDL_SYS_JoystickOpen(joystick, device_index) < 0) {
113
114
115
SDL_free(joystick);
return NULL;
}
116
117
118
119
120
121
joystickname = SDL_SYS_JoystickNameForDeviceIndex( device_index );
if ( joystickname )
joystick->name = SDL_strdup( joystickname );
else
joystick->name = NULL;
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
if (joystick->naxes > 0) {
joystick->axes = (Sint16 *) SDL_malloc
(joystick->naxes * sizeof(Sint16));
}
if (joystick->nhats > 0) {
joystick->hats = (Uint8 *) SDL_malloc
(joystick->nhats * sizeof(Uint8));
}
if (joystick->nballs > 0) {
joystick->balls = (struct balldelta *) SDL_malloc
(joystick->nballs * sizeof(*joystick->balls));
}
if (joystick->nbuttons > 0) {
joystick->buttons = (Uint8 *) SDL_malloc
(joystick->nbuttons * sizeof(Uint8));
}
if (((joystick->naxes > 0) && !joystick->axes)
|| ((joystick->nhats > 0) && !joystick->hats)
|| ((joystick->nballs > 0) && !joystick->balls)
|| ((joystick->nbuttons > 0) && !joystick->buttons)) {
SDL_OutOfMemory();
SDL_JoystickClose(joystick);
return NULL;
}
if (joystick->axes) {
SDL_memset(joystick->axes, 0, joystick->naxes * sizeof(Sint16));
}
if (joystick->hats) {
SDL_memset(joystick->hats, 0, joystick->nhats * sizeof(Uint8));
}
if (joystick->balls) {
SDL_memset(joystick->balls, 0,
joystick->nballs * sizeof(*joystick->balls));
}
if (joystick->buttons) {
SDL_memset(joystick->buttons, 0, joystick->nbuttons * sizeof(Uint8));
}
/* Add joystick to list */
++joystick->ref_count;
163
164
165
/* Link the joystick in the list */
joystick->next = SDL_joysticks;
SDL_joysticks = joystick;
166
167
SDL_SYS_JoystickUpdate( joystick );
168
169
return (joystick);
170
171
172
173
174
175
176
}
/*
* Checks to make sure the joystick is valid.
*/
int
177
SDL_PrivateJoystickValid(SDL_Joystick * joystick)
178
179
180
{
int valid;
181
if ( joystick == NULL ) {
182
183
184
185
186
SDL_SetError("Joystick hasn't been opened yet");
valid = 0;
} else {
valid = 1;
}
187
188
189
190
191
192
if ( joystick && joystick->closed )
{
valid = 0;
}
193
194
195
196
197
198
199
200
201
return valid;
}
/*
* Get the number of multi-dimensional axis controls on a joystick
*/
int
SDL_JoystickNumAxes(SDL_Joystick * joystick)
{
202
if (!SDL_PrivateJoystickValid(joystick)) {
203
204
205
206
207
208
209
210
211
212
213
return (-1);
}
return (joystick->naxes);
}
/*
* Get the number of hats on a joystick
*/
int
SDL_JoystickNumHats(SDL_Joystick * joystick)
{
214
if (!SDL_PrivateJoystickValid(joystick)) {
215
216
217
218
219
220
221
222
223
224
225
return (-1);
}
return (joystick->nhats);
}
/*
* Get the number of trackballs on a joystick
*/
int
SDL_JoystickNumBalls(SDL_Joystick * joystick)
{
226
if (!SDL_PrivateJoystickValid(joystick)) {
227
228
229
230
231
232
233
234
235
236
237
return (-1);
}
return (joystick->nballs);
}
/*
* Get the number of buttons on a joystick
*/
int
SDL_JoystickNumButtons(SDL_Joystick * joystick)
{
238
if (!SDL_PrivateJoystickValid(joystick)) {
239
240
241
242
243
244
245
246
247
248
249
250
251
return (-1);
}
return (joystick->nbuttons);
}
/*
* Get the current state of an axis control on a joystick
*/
Sint16
SDL_JoystickGetAxis(SDL_Joystick * joystick, int axis)
{
Sint16 state;
252
if (!SDL_PrivateJoystickValid(joystick)) {
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
return (0);
}
if (axis < joystick->naxes) {
state = joystick->axes[axis];
} else {
SDL_SetError("Joystick only has %d axes", joystick->naxes);
state = 0;
}
return (state);
}
/*
* Get the current state of a hat on a joystick
*/
Uint8
SDL_JoystickGetHat(SDL_Joystick * joystick, int hat)
{
Uint8 state;
272
if (!SDL_PrivateJoystickValid(joystick)) {
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
return (0);
}
if (hat < joystick->nhats) {
state = joystick->hats[hat];
} else {
SDL_SetError("Joystick only has %d hats", joystick->nhats);
state = 0;
}
return (state);
}
/*
* Get the ball axis change since the last poll
*/
int
SDL_JoystickGetBall(SDL_Joystick * joystick, int ball, int *dx, int *dy)
{
int retval;
292
if (!SDL_PrivateJoystickValid(joystick)) {
293
294
295
296
297
298
299
300
301
302
303
304
305
306
return (-1);
}
retval = 0;
if (ball < joystick->nballs) {
if (dx) {
*dx = joystick->balls[ball].dx;
}
if (dy) {
*dy = joystick->balls[ball].dy;
}
joystick->balls[ball].dx = 0;
joystick->balls[ball].dy = 0;
} else {
307
return SDL_SetError("Joystick only has %d balls", joystick->nballs);
308
309
310
311
312
313
314
315
316
317
318
319
}
return (retval);
}
/*
* Get the current state of a button on a joystick
*/
Uint8
SDL_JoystickGetButton(SDL_Joystick * joystick, int button)
{
Uint8 state;
320
if (!SDL_PrivateJoystickValid(joystick)) {
321
322
323
324
325
326
327
328
329
330
331
return (0);
}
if (button < joystick->nbuttons) {
state = joystick->buttons[button];
} else {
SDL_SetError("Joystick only has %d buttons", joystick->nbuttons);
state = 0;
}
return (state);
}
332
333
334
335
/*
* Return if the joystick in question is currently attached to the system,
* \return 0 if not plugged in, 1 if still present.
*/
336
337
SDL_bool
SDL_JoystickGetAttached(SDL_Joystick * joystick)
338
{
339
if (!SDL_PrivateJoystickValid(joystick)) {
340
return SDL_FALSE;
341
342
}
343
return SDL_SYS_JoystickAttached(joystick);
344
345
346
347
348
}
/*
* Get the instance id for this opened joystick
*/
349
SDL_JoystickID
350
SDL_JoystickInstanceID(SDL_Joystick * joystick)
351
{
352
if (!SDL_PrivateJoystickValid(joystick)) {
353
354
355
return (-1);
}
356
return (joystick->instance_id);
357
358
359
360
361
362
363
364
365
366
367
}
/*
* Get the friendly name of this joystick
*/
const char *
SDL_JoystickName(SDL_Joystick * joystick)
{
if (!SDL_PrivateJoystickValid(joystick)) {
return (NULL);
}
368
369
370
371
return (joystick->name);
}
372
373
374
375
376
377
/*
* Close a joystick previously opened with SDL_JoystickOpen()
*/
void
SDL_JoystickClose(SDL_Joystick * joystick)
{
378
379
SDL_Joystick *joysticklist;
SDL_Joystick *joysticklistprev;
380
381
if (!joystick) {
382
383
384
385
386
387
388
389
return;
}
/* First decrement ref count */
if (--joystick->ref_count > 0) {
return;
}
390
391
392
393
if (joystick == SDL_updating_joystick) {
return;
}
394
SDL_SYS_JoystickClose(joystick);
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
joysticklist = SDL_joysticks;
joysticklistprev = NULL;
while ( joysticklist )
{
if (joystick == joysticklist)
{
if ( joysticklistprev )
{
/* unlink this entry */
joysticklistprev->next = joysticklist->next;
}
else
{
SDL_joysticks = joystick->next;
}
break;
}
joysticklistprev = joysticklist;
joysticklist = joysticklist->next;
}
if (joystick->name)
SDL_free(joystick->name);
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
/* Free the data associated with this joystick */
if (joystick->axes) {
SDL_free(joystick->axes);
}
if (joystick->hats) {
SDL_free(joystick->hats);
}
if (joystick->balls) {
SDL_free(joystick->balls);
}
if (joystick->buttons) {
SDL_free(joystick->buttons);
}
SDL_free(joystick);
}
void
SDL_JoystickQuit(void)
{
440
441
442
/* Make sure we're not getting called in the middle of updating joysticks */
SDL_assert(!SDL_updating_joystick);
443
/* Stop the event polling */
444
445
446
while ( SDL_joysticks )
{
SDL_joysticks->ref_count = 1;
447
SDL_JoystickClose(SDL_joysticks);
448
}
449
450
451
452
453
454
/* Quit the joystick setup */
SDL_SYS_JoystickQuit();
}
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
static SDL_bool
SDL_PrivateJoystickShouldIgnoreEvent()
{
const char *hint;
if (SDL_GetKeyboardFocus() != NULL) {
return SDL_FALSE;
}
hint = SDL_GetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS);
if (hint && *hint == '1') {
return SDL_FALSE;
}
return SDL_TRUE;
}
471
472
473
474
475
476
477
478
479
480
481
482
483
/* These are global for SDL_sysjoystick.c and SDL_events.c */
int
SDL_PrivateJoystickAxis(SDL_Joystick * joystick, Uint8 axis, Sint16 value)
{
int posted;
/* Make sure we're not getting garbage events */
if (axis >= joystick->naxes) {
return 0;
}
/* Update internal joystick state */
484
485
486
if (value == joystick->axes[axis]) {
return 0;
}
487
488
joystick->axes[axis] = value;
489
490
491
492
493
494
495
496
497
/* We ignore events if we don't have keyboard focus, except for centering
* events.
*/
if (SDL_PrivateJoystickShouldIgnoreEvent()) {
if (!(joystick->closed && joystick->uncentered)) {
return 0;
}
}
498
499
500
501
502
503
/* Post the event, if desired */
posted = 0;
#if !SDL_EVENTS_DISABLED
if (SDL_GetEventState(SDL_JOYAXISMOTION) == SDL_ENABLE) {
SDL_Event event;
event.type = SDL_JOYAXISMOTION;
504
event.jaxis.which = joystick->instance_id;
505
506
event.jaxis.axis = axis;
event.jaxis.value = value;
507
posted = SDL_PushEvent(&event) == 1;
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
}
#endif /* !SDL_EVENTS_DISABLED */
return (posted);
}
int
SDL_PrivateJoystickHat(SDL_Joystick * joystick, Uint8 hat, Uint8 value)
{
int posted;
/* Make sure we're not getting garbage events */
if (hat >= joystick->nhats) {
return 0;
}
/* Update internal joystick state */
joystick->hats[hat] = value;
526
527
528
529
530
531
532
533
534
535
/* We ignore events if we don't have keyboard focus, except for centering
* events.
*/
if (SDL_PrivateJoystickShouldIgnoreEvent()) {
if (!(joystick->closed && joystick->uncentered)) {
return 0;
}
}
536
537
538
539
540
541
/* Post the event, if desired */
posted = 0;
#if !SDL_EVENTS_DISABLED
if (SDL_GetEventState(SDL_JOYHATMOTION) == SDL_ENABLE) {
SDL_Event event;
event.jhat.type = SDL_JOYHATMOTION;
542
event.jhat.which = joystick->instance_id;
543
544
event.jhat.hat = hat;
event.jhat.value = value;
545
posted = SDL_PushEvent(&event) == 1;
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
}
#endif /* !SDL_EVENTS_DISABLED */
return (posted);
}
int
SDL_PrivateJoystickBall(SDL_Joystick * joystick, Uint8 ball,
Sint16 xrel, Sint16 yrel)
{
int posted;
/* Make sure we're not getting garbage events */
if (ball >= joystick->nballs) {
return 0;
}
562
563
564
565
566
/* We ignore events if we don't have keyboard focus. */
if (SDL_PrivateJoystickShouldIgnoreEvent()) {
return 0;
}
567
568
569
570
571
572
573
574
575
576
/* Update internal mouse state */
joystick->balls[ball].dx += xrel;
joystick->balls[ball].dy += yrel;
/* Post the event, if desired */
posted = 0;
#if !SDL_EVENTS_DISABLED
if (SDL_GetEventState(SDL_JOYBALLMOTION) == SDL_ENABLE) {
SDL_Event event;
event.jball.type = SDL_JOYBALLMOTION;
577
event.jball.which = joystick->instance_id;
578
579
580
event.jball.ball = ball;
event.jball.xrel = xrel;
event.jball.yrel = yrel;
581
posted = SDL_PushEvent(&event) == 1;
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
}
#endif /* !SDL_EVENTS_DISABLED */
return (posted);
}
int
SDL_PrivateJoystickButton(SDL_Joystick * joystick, Uint8 button, Uint8 state)
{
int posted;
#if !SDL_EVENTS_DISABLED
SDL_Event event;
switch (state) {
case SDL_PRESSED:
event.type = SDL_JOYBUTTONDOWN;
break;
case SDL_RELEASED:
event.type = SDL_JOYBUTTONUP;
break;
default:
/* Invalid state -- bail */
return (0);
}
#endif /* !SDL_EVENTS_DISABLED */
/* Make sure we're not getting garbage events */
if (button >= joystick->nbuttons) {
return 0;
}
612
613
/* We ignore events if we don't have keyboard focus, except for button
* release. */
614
if (state == SDL_PRESSED && SDL_PrivateJoystickShouldIgnoreEvent()) {
615
616
617
return 0;
}
618
619
620
621
622
623
624
/* Update internal joystick state */
joystick->buttons[button] = state;
/* Post the event, if desired */
posted = 0;
#if !SDL_EVENTS_DISABLED
if (SDL_GetEventState(event.type) == SDL_ENABLE) {
625
event.jbutton.which = joystick->instance_id;
626
627
event.jbutton.button = button;
event.jbutton.state = state;
628
posted = SDL_PushEvent(&event) == 1;
629
630
631
632
633
634
635
636
}
#endif /* !SDL_EVENTS_DISABLED */
return (posted);
}
void
SDL_JoystickUpdate(void)
{
637
638
639
640
641
642
643
644
645
646
SDL_Joystick *joystick;
joystick = SDL_joysticks;
while ( joystick )
{
SDL_Joystick *joysticknext;
/* save off the next pointer, the Update call may cause a joystick removed event
* and cause our joystick pointer to be freed
*/
joysticknext = joystick->next;
647
648
649
SDL_updating_joystick = joystick;
650
651
SDL_SYS_JoystickUpdate( joystick );
652
653
654
if ( joystick->closed && joystick->uncentered )
{
int i;
655
656
/* Tell the app that everything is centered/unpressed... */
657
658
659
660
661
662
663
664
for (i = 0; i < joystick->naxes; i++)
SDL_PrivateJoystickAxis(joystick, i, 0);
for (i = 0; i < joystick->nbuttons; i++)
SDL_PrivateJoystickButton(joystick, i, 0);
for (i = 0; i < joystick->nhats; i++)
SDL_PrivateJoystickHat(joystick, i, SDL_HAT_CENTERED);
665
666
joystick->uncentered = 0;
667
}
668
669
670
671
672
673
674
675
SDL_updating_joystick = NULL;
/* If the joystick was closed while updating, free it here */
if ( joystick->ref_count <= 0 ) {
SDL_JoystickClose(joystick);
}
676
677
joystick = joysticknext;
}
678
679
680
681
682
/* this needs to happen AFTER walking the joystick list above, so that any
dangling hardware data from removed devices can be free'd
*/
SDL_SYS_JoystickDetect();
683
684
685
686
687
688
}
int
SDL_JoystickEventState(int state)
{
#if SDL_EVENTS_DISABLED
689
return SDL_DISABLE;
690
691
692
#else
const Uint32 event_list[] = {
SDL_JOYAXISMOTION, SDL_JOYBALLMOTION, SDL_JOYHATMOTION,
693
SDL_JOYBUTTONDOWN, SDL_JOYBUTTONUP, SDL_JOYDEVICEADDED, SDL_JOYDEVICEREMOVED
694
695
696
697
698
};
unsigned int i;
switch (state) {
case SDL_QUERY:
699
state = SDL_DISABLE;
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
for (i = 0; i < SDL_arraysize(event_list); ++i) {
state = SDL_EventState(event_list[i], SDL_QUERY);
if (state == SDL_ENABLE) {
break;
}
}
break;
default:
for (i = 0; i < SDL_arraysize(event_list); ++i) {
SDL_EventState(event_list[i], state);
}
break;
}
return (state);
#endif /* SDL_EVENTS_DISABLED */
}
717
/* return 1 if you want to run the joystick update loop this frame, used by hotplug support */
718
SDL_bool
719
720
SDL_PrivateJoystickNeedsPolling()
{
721
722
723
724
725
if (SDL_joysticks != NULL) {
return SDL_TRUE;
} else {
return SDL_SYS_JoystickNeedsPolling();
}
726
727
728
}
729
/* return the guid for this index */
730
SDL_JoystickGUID SDL_JoystickGetDeviceGUID(int device_index)
731
{
732
733
734
735
736
737
if ((device_index < 0) || (device_index >= SDL_NumJoysticks())) {
SDL_JoystickGUID emptyGUID;
SDL_SetError("There are %d joysticks available", SDL_NumJoysticks());
SDL_zero( emptyGUID );
return emptyGUID;
}
738
return SDL_SYS_JoystickGetDeviceGUID( device_index );
739
740
}
741
/* return the guid for this opened device */
742
SDL_JoystickGUID SDL_JoystickGetGUID(SDL_Joystick * joystick)
743
{
744
return SDL_SYS_JoystickGetGUID( joystick );
745
746
747
}
/* convert the guid to a printable string */
748
void SDL_JoystickGetGUIDString( SDL_JoystickGUID guid, char *pszGUID, int cbGUID )
749
{
750
751
static const char k_rgchHexToASCII[] = "0123456789abcdef";
int i;
752
753
754
755
756
if ((pszGUID == NULL) || (cbGUID <= 0)) {
return;
}
757
758
759
760
761
for ( i = 0; i < sizeof(guid.data) && i < (cbGUID-1); i++ )
{
/* each input byte writes 2 ascii chars, and might write a null byte. */
/* If we don't have room for next input byte, stop */
unsigned char c = guid.data[i];
762
763
764
765
766
*pszGUID++ = k_rgchHexToASCII[ c >> 4 ];
*pszGUID++ = k_rgchHexToASCII[ c & 0x0F ];
}
*pszGUID = '\0';
767
768
769
}
770
771
772
773
774
/*-----------------------------------------------------------------------------
* Purpose: Returns the 4 bit nibble for a hex character
* Input : c -
* Output : unsigned char
*-----------------------------------------------------------------------------*/
775
776
static unsigned char nibble( char c )
{
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
if ( ( c >= '0' ) &&
( c <= '9' ) )
{
return (unsigned char)(c - '0');
}
if ( ( c >= 'A' ) &&
( c <= 'F' ) )
{
return (unsigned char)(c - 'A' + 0x0a);
}
if ( ( c >= 'a' ) &&
( c <= 'f' ) )
{
return (unsigned char)(c - 'a' + 0x0a);
}
/* received an invalid character, and no real way to return an error */
/* AssertMsg1( false, "Q_nibble invalid hex character '%c' ", c ); */
return 0;
798
799
800
801
}
/* convert the string version of a joystick guid to the struct */
802
SDL_JoystickGUID SDL_JoystickGetGUIDFromString(const char *pchGUID)
803
{
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
SDL_JoystickGUID guid;
int maxoutputbytes= sizeof(guid);
int len = SDL_strlen( pchGUID );
Uint8 *p;
int i;
/* Make sure it's even */
len = ( len ) & ~0x1;
SDL_memset( &guid, 0x00, sizeof(guid) );
p = (Uint8 *)&guid;
for ( i = 0;
( i < len ) && ( ( p - (Uint8 *)&guid ) < maxoutputbytes );
i+=2, p++ )
{
*p = ( nibble( pchGUID[i] ) << 4 ) | nibble( pchGUID[i+1] );
}
return guid;
824
825
826
}
827
/* vi: set ts=4 sw=4 expandtab: */