/
physfs.c
2781 lines (2232 loc) · 77.2 KB
1
2
3
4
5
/**
* PhysicsFS; a portable, flexible file i/o abstraction.
*
* Documentation is in physfs.h. It's verbose, honest. :)
*
6
* Please see the file LICENSE.txt in the source's root directory.
7
8
9
10
*
* This file written by Ryan C. Gordon.
*/
11
/* !!! FIXME: ERR_PAST_EOF shouldn't trigger for reads. Just return zero. */
12
/* !!! FIXME: use snprintf(), not sprintf(). */
13
14
15
16
#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
17
18
19
typedef struct __PHYSFS_DIRHANDLE__
{
20
21
void *opaque; /* Instance data unique to the archiver. */
char *dirName; /* Path to archive in platform-dependent notation. */
22
char *mountPoint; /* Mountpoint in virtual file tree. */
23
24
const PHYSFS_Archiver *funcs; /* Ptr to archiver info for this handle. */
struct __PHYSFS_DIRHANDLE__ *next; /* linked list stuff. */
25
26
27
} DirHandle;
28
29
typedef struct __PHYSFS_FILEHANDLE__
{
30
PHYSFS_Io *io; /* Instance data unique to the archiver for this file. */
31
32
33
34
35
36
37
38
39
40
PHYSFS_uint8 forReading; /* Non-zero if reading, zero if write/append */
const DirHandle *dirHandle; /* Archiver instance that created this */
PHYSFS_uint8 *buffer; /* Buffer, if set (NULL otherwise). Don't touch! */
PHYSFS_uint32 bufsize; /* Bufsize, if set (0 otherwise). Don't touch! */
PHYSFS_uint32 buffill; /* Buffer fill size. Don't touch! */
PHYSFS_uint32 bufpos; /* Buffer position. Don't touch! */
struct __PHYSFS_FILEHANDLE__ *next; /* linked list stuff. */
} FileHandle;
41
typedef struct __PHYSFS_ERRSTATETYPE__
42
{
43
void *tid;
44
45
46
PHYSFS_ErrorCode code;
struct __PHYSFS_ERRSTATETYPE__ *next;
} ErrState;
47
48
49
/* The various i/o drivers...some of these may not be compiled in. */
50
51
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_ZIP;
extern const PHYSFS_Archiver __PHYSFS_Archiver_ZIP;
52
53
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_LZMA;
extern const PHYSFS_Archiver __PHYSFS_Archiver_LZMA;
54
55
56
57
58
59
60
61
62
63
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_GRP;
extern const PHYSFS_Archiver __PHYSFS_Archiver_GRP;
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_QPAK;
extern const PHYSFS_Archiver __PHYSFS_Archiver_QPAK;
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_HOG;
extern const PHYSFS_Archiver __PHYSFS_Archiver_HOG;
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_MVL;
extern const PHYSFS_Archiver __PHYSFS_Archiver_MVL;
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_WAD;
extern const PHYSFS_Archiver __PHYSFS_Archiver_WAD;
64
extern const PHYSFS_Archiver __PHYSFS_Archiver_DIR;
65
66
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_ISO9660;
extern const PHYSFS_Archiver __PHYSFS_Archiver_ISO9660;
67
68
69
static const PHYSFS_ArchiveInfo *supported_types[] =
70
71
{
#if (defined PHYSFS_SUPPORTS_ZIP)
72
&__PHYSFS_ArchiveInfo_ZIP,
73
#endif
74
#if (defined PHYSFS_SUPPORTS_7Z)
75
76
&__PHYSFS_ArchiveInfo_LZMA,
#endif
77
78
79
#if (defined PHYSFS_SUPPORTS_GRP)
&__PHYSFS_ArchiveInfo_GRP,
#endif
80
81
82
#if (defined PHYSFS_SUPPORTS_QPAK)
&__PHYSFS_ArchiveInfo_QPAK,
#endif
83
84
85
86
87
88
#if (defined PHYSFS_SUPPORTS_HOG)
&__PHYSFS_ArchiveInfo_HOG,
#endif
#if (defined PHYSFS_SUPPORTS_MVL)
&__PHYSFS_ArchiveInfo_MVL,
#endif
89
90
#if (defined PHYSFS_SUPPORTS_WAD)
&__PHYSFS_ArchiveInfo_WAD,
91
#endif
92
#if (defined PHYSFS_SUPPORTS_ISO9660)
93
&__PHYSFS_ArchiveInfo_ISO9660,
94
#endif
95
96
97
NULL
};
98
static const PHYSFS_Archiver *archivers[] =
99
100
{
#if (defined PHYSFS_SUPPORTS_ZIP)
101
&__PHYSFS_Archiver_ZIP,
102
#endif
103
#if (defined PHYSFS_SUPPORTS_7Z)
104
105
&__PHYSFS_Archiver_LZMA,
#endif
106
#if (defined PHYSFS_SUPPORTS_GRP)
107
&__PHYSFS_Archiver_GRP,
108
#endif
109
#if (defined PHYSFS_SUPPORTS_QPAK)
110
&__PHYSFS_Archiver_QPAK,
111
#endif
112
#if (defined PHYSFS_SUPPORTS_HOG)
113
&__PHYSFS_Archiver_HOG,
114
115
#endif
#if (defined PHYSFS_SUPPORTS_MVL)
116
&__PHYSFS_Archiver_MVL,
117
#endif
118
#if (defined PHYSFS_SUPPORTS_WAD)
119
&__PHYSFS_Archiver_WAD,
120
#endif
121
#if (defined PHYSFS_SUPPORTS_ISO9660)
122
&__PHYSFS_Archiver_ISO9660,
123
#endif
124
125
NULL
};
126
127
128
129
130
/* General PhysicsFS state ... */
static int initialized = 0;
131
static ErrState *errorStates = NULL;
132
133
134
135
static DirHandle *searchPath = NULL;
static DirHandle *writeDir = NULL;
static FileHandle *openWriteList = NULL;
static FileHandle *openReadList = NULL;
136
137
static char *baseDir = NULL;
static char *userDir = NULL;
138
static char *prefDir = NULL;
139
140
static int allowSymLinks = 0;
141
142
143
/* mutexes ... */
static void *errorLock = NULL; /* protects error message list. */
static void *stateLock = NULL; /* protects other PhysFS static state. */
144
145
146
/* allocator ... */
static int externalAllocator = 0;
147
PHYSFS_Allocator allocator;
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
/* PHYSFS_Io implementation for i/o to physical filesystem... */
/* !!! FIXME: maybe refcount the paths in a string pool? */
typedef struct __PHYSFS_NativeIoInfo
{
void *handle;
const char *path;
int mode; /* 'r', 'w', or 'a' */
} NativeIoInfo;
static PHYSFS_sint64 nativeIo_read(PHYSFS_Io *io, void *buf, PHYSFS_uint64 len)
{
NativeIoInfo *info = (NativeIoInfo *) io->opaque;
return __PHYSFS_platformRead(info->handle, buf, len);
} /* nativeIo_read */
static PHYSFS_sint64 nativeIo_write(PHYSFS_Io *io, const void *buffer,
PHYSFS_uint64 len)
{
NativeIoInfo *info = (NativeIoInfo *) io->opaque;
return __PHYSFS_platformWrite(info->handle, buffer, len);
} /* nativeIo_write */
static int nativeIo_seek(PHYSFS_Io *io, PHYSFS_uint64 offset)
{
NativeIoInfo *info = (NativeIoInfo *) io->opaque;
return __PHYSFS_platformSeek(info->handle, offset);
} /* nativeIo_seek */
static PHYSFS_sint64 nativeIo_tell(PHYSFS_Io *io)
{
NativeIoInfo *info = (NativeIoInfo *) io->opaque;
return __PHYSFS_platformTell(info->handle);
} /* nativeIo_tell */
static PHYSFS_sint64 nativeIo_length(PHYSFS_Io *io)
{
NativeIoInfo *info = (NativeIoInfo *) io->opaque;
return __PHYSFS_platformFileLength(info->handle);
} /* nativeIo_length */
static PHYSFS_Io *nativeIo_duplicate(PHYSFS_Io *io)
{
NativeIoInfo *info = (NativeIoInfo *) io->opaque;
return __PHYSFS_createNativeIo(info->path, info->mode);
} /* nativeIo_duplicate */
static int nativeIo_flush(PHYSFS_Io *io)
{
return __PHYSFS_platformFlush(io->opaque);
} /* nativeIo_flush */
static void nativeIo_destroy(PHYSFS_Io *io)
{
NativeIoInfo *info = (NativeIoInfo *) io->opaque;
__PHYSFS_platformClose(info->handle);
allocator.Free((void *) info->path);
allocator.Free(info);
allocator.Free(io);
} /* nativeIo_destroy */
static const PHYSFS_Io __PHYSFS_nativeIoInterface =
{
nativeIo_read,
nativeIo_write,
nativeIo_seek,
nativeIo_tell,
nativeIo_length,
nativeIo_duplicate,
nativeIo_flush,
nativeIo_destroy,
NULL
};
PHYSFS_Io *__PHYSFS_createNativeIo(const char *path, const int mode)
{
PHYSFS_Io *io = NULL;
NativeIoInfo *info = NULL;
void *handle = NULL;
char *pathdup = NULL;
assert((mode == 'r') || (mode == 'w') || (mode == 'a'));
io = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
234
GOTO_IF_MACRO(!io, PHYSFS_ERR_OUT_OF_MEMORY, createNativeIo_failed);
235
info = (NativeIoInfo *) allocator.Malloc(sizeof (NativeIoInfo));
236
GOTO_IF_MACRO(!info, PHYSFS_ERR_OUT_OF_MEMORY, createNativeIo_failed);
237
pathdup = (char *) allocator.Malloc(strlen(path) + 1);
238
GOTO_IF_MACRO(!pathdup, PHYSFS_ERR_OUT_OF_MEMORY, createNativeIo_failed);
239
240
241
242
243
244
245
246
if (mode == 'r')
handle = __PHYSFS_platformOpenRead(path);
else if (mode == 'w')
handle = __PHYSFS_platformOpenWrite(path);
else if (mode == 'a')
handle = __PHYSFS_platformOpenAppend(path);
247
GOTO_IF_MACRO(!handle, ERRPASS, createNativeIo_failed);
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
strcpy(pathdup, path);
info->handle = handle;
info->path = pathdup;
info->mode = mode;
memcpy(io, &__PHYSFS_nativeIoInterface, sizeof (*io));
io->opaque = info;
return io;
createNativeIo_failed:
if (handle != NULL) __PHYSFS_platformClose(handle);
if (pathdup != NULL) allocator.Free(pathdup);
if (info != NULL) allocator.Free(info);
if (io != NULL) allocator.Free(io);
return NULL;
} /* __PHYSFS_createNativeIo */
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
/* PHYSFS_Io implementation for i/o to a memory buffer... */
typedef struct __PHYSFS_MemoryIoInfo
{
const PHYSFS_uint8 *buf;
PHYSFS_uint64 len;
PHYSFS_uint64 pos;
PHYSFS_Io *parent;
volatile PHYSFS_uint32 refcount;
void (*destruct)(void *);
} MemoryIoInfo;
static PHYSFS_sint64 memoryIo_read(PHYSFS_Io *io, void *buf, PHYSFS_uint64 len)
{
MemoryIoInfo *info = (MemoryIoInfo *) io->opaque;
const PHYSFS_uint64 avail = info->len - info->pos;
assert(avail <= info->len);
if (avail == 0)
return 0; /* we're at EOF; nothing to do. */
if (len > avail)
len = avail;
290
memcpy(buf, info->buf + info->pos, (size_t) len);
291
292
293
294
295
296
297
info->pos += len;
return len;
} /* memoryIo_read */
static PHYSFS_sint64 memoryIo_write(PHYSFS_Io *io, const void *buffer,
PHYSFS_uint64 len)
{
298
BAIL_MACRO(PHYSFS_ERR_OPEN_FOR_READING, -1);
299
300
301
302
303
} /* memoryIo_write */
static int memoryIo_seek(PHYSFS_Io *io, PHYSFS_uint64 offset)
{
MemoryIoInfo *info = (MemoryIoInfo *) io->opaque;
304
BAIL_IF_MACRO(offset > info->len, PHYSFS_ERR_PAST_EOF, 0);
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
info->pos = offset;
return 1;
} /* memoryIo_seek */
static PHYSFS_sint64 memoryIo_tell(PHYSFS_Io *io)
{
const MemoryIoInfo *info = (MemoryIoInfo *) io->opaque;
return (PHYSFS_sint64) info->pos;
} /* memoryIo_tell */
static PHYSFS_sint64 memoryIo_length(PHYSFS_Io *io)
{
const MemoryIoInfo *info = (MemoryIoInfo *) io->opaque;
return (PHYSFS_sint64) info->len;
} /* memoryIo_length */
static PHYSFS_Io *memoryIo_duplicate(PHYSFS_Io *io)
{
MemoryIoInfo *info = (MemoryIoInfo *) io->opaque;
MemoryIoInfo *newinfo = NULL;
PHYSFS_Io *parent = info->parent;
PHYSFS_Io *retval = NULL;
/* avoid deep copies. */
assert((!parent) || (!((MemoryIoInfo *) parent->opaque)->parent) );
/* share the buffer between duplicates. */
if (parent != NULL) /* dup the parent, increment its refcount. */
return parent->duplicate(parent);
/* we're the parent. */
retval = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
338
BAIL_IF_MACRO(!retval, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
339
340
341
342
newinfo = (MemoryIoInfo *) allocator.Malloc(sizeof (MemoryIoInfo));
if (!newinfo)
{
allocator.Free(retval);
343
BAIL_MACRO(PHYSFS_ERR_OUT_OF_MEMORY, NULL);
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
} /* if */
/* !!! FIXME: want lockless atomic increment. */
__PHYSFS_platformGrabMutex(stateLock);
info->refcount++;
__PHYSFS_platformReleaseMutex(stateLock);
memset(newinfo, '\0', sizeof (*info));
newinfo->buf = info->buf;
newinfo->len = info->len;
newinfo->pos = 0;
newinfo->parent = io;
newinfo->refcount = 0;
newinfo->destruct = NULL;
memcpy(retval, io, sizeof (*retval));
retval->opaque = newinfo;
return retval;
} /* memoryIo_duplicate */
static int memoryIo_flush(PHYSFS_Io *io) { return 1; /* it's read-only. */ }
static void memoryIo_destroy(PHYSFS_Io *io)
{
MemoryIoInfo *info = (MemoryIoInfo *) io->opaque;
PHYSFS_Io *parent = info->parent;
int should_die = 0;
if (parent != NULL)
{
assert(info->buf == ((MemoryIoInfo *) info->parent->opaque)->buf);
assert(info->len == ((MemoryIoInfo *) info->parent->opaque)->len);
assert(info->refcount == 0);
assert(info->destruct == NULL);
allocator.Free(info);
allocator.Free(io);
parent->destroy(parent); /* decrements refcount. */
return;
} /* if */
/* we _are_ the parent. */
assert(info->refcount > 0); /* even in a race, we hold a reference. */
/* !!! FIXME: want lockless atomic decrement. */
__PHYSFS_platformGrabMutex(stateLock);
info->refcount--;
should_die = (info->refcount == 0);
__PHYSFS_platformReleaseMutex(stateLock);
if (should_die)
{
void (*destruct)(void *) = info->destruct;
void *buf = (void *) info->buf;
io->opaque = NULL; /* kill this here in case of race. */
allocator.Free(info);
allocator.Free(io);
if (destruct != NULL)
401
destruct(buf);
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
} /* if */
} /* memoryIo_destroy */
static const PHYSFS_Io __PHYSFS_memoryIoInterface =
{
memoryIo_read,
memoryIo_write,
memoryIo_seek,
memoryIo_tell,
memoryIo_length,
memoryIo_duplicate,
memoryIo_flush,
memoryIo_destroy,
NULL
};
PHYSFS_Io *__PHYSFS_createMemoryIo(const void *buf, PHYSFS_uint64 len,
void (*destruct)(void *))
{
PHYSFS_Io *io = NULL;
MemoryIoInfo *info = NULL;
io = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
426
GOTO_IF_MACRO(!io, PHYSFS_ERR_OUT_OF_MEMORY, createMemoryIo_failed);
427
info = (MemoryIoInfo *) allocator.Malloc(sizeof (MemoryIoInfo));
428
GOTO_IF_MACRO(!info, PHYSFS_ERR_OUT_OF_MEMORY, createMemoryIo_failed);
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
memset(info, '\0', sizeof (*info));
info->buf = (const PHYSFS_uint8 *) buf;
info->len = len;
info->pos = 0;
info->parent = NULL;
info->refcount = 1;
info->destruct = destruct;
memcpy(io, &__PHYSFS_memoryIoInterface, sizeof (*io));
io->opaque = info;
return io;
createMemoryIo_failed:
if (info != NULL) allocator.Free(info);
if (io != NULL) allocator.Free(io);
return NULL;
} /* __PHYSFS_createMemoryIo */
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
/* PHYSFS_Io implementation for i/o to a PHYSFS_File... */
static PHYSFS_sint64 handleIo_read(PHYSFS_Io *io, void *buf, PHYSFS_uint64 len)
{
return PHYSFS_readBytes((PHYSFS_File *) io->opaque, buf, len);
} /* handleIo_read */
static PHYSFS_sint64 handleIo_write(PHYSFS_Io *io, const void *buffer,
PHYSFS_uint64 len)
{
return PHYSFS_writeBytes((PHYSFS_File *) io->opaque, buffer, len);
} /* handleIo_write */
static int handleIo_seek(PHYSFS_Io *io, PHYSFS_uint64 offset)
{
return PHYSFS_seek((PHYSFS_File *) io->opaque, offset);
} /* handleIo_seek */
static PHYSFS_sint64 handleIo_tell(PHYSFS_Io *io)
{
return PHYSFS_tell((PHYSFS_File *) io->opaque);
} /* handleIo_tell */
static PHYSFS_sint64 handleIo_length(PHYSFS_Io *io)
{
return PHYSFS_fileLength((PHYSFS_File *) io->opaque);
} /* handleIo_length */
static PHYSFS_Io *handleIo_duplicate(PHYSFS_Io *io)
{
/*
* There's no duplicate at the PHYSFS_File level, so we break the
* abstraction. We're allowed to: we're physfs.c!
*/
FileHandle *origfh = (FileHandle *) io->opaque;
FileHandle *newfh = (FileHandle *) allocator.Malloc(sizeof (FileHandle));
PHYSFS_Io *retval = NULL;
487
GOTO_IF_MACRO(!newfh, PHYSFS_ERR_OUT_OF_MEMORY, handleIo_dupe_failed);
488
489
490
memset(newfh, '\0', sizeof (*newfh));
retval = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
491
GOTO_IF_MACRO(!retval, PHYSFS_ERR_OUT_OF_MEMORY, handleIo_dupe_failed);
492
493
494
495
496
#if 0 /* we don't buffer the duplicate, at least not at the moment. */
if (origfh->buffer != NULL)
{
newfh->buffer = (PHYSFS_uint8 *) allocator.Malloc(origfh->bufsize);
497
498
if (!newfh->buffer)
GOTO_MACRO(PHYSFS_ERR_OUT_OF_MEMORY, handleIo_dupe_failed);
499
500
501
502
503
newfh->bufsize = origfh->bufsize;
} /* if */
#endif
newfh->io = origfh->io->duplicate(origfh->io);
504
GOTO_IF_MACRO(!newfh->io, ERRPASS, handleIo_dupe_failed);
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
newfh->forReading = origfh->forReading;
newfh->dirHandle = origfh->dirHandle;
__PHYSFS_platformGrabMutex(stateLock);
if (newfh->forReading)
{
newfh->next = openReadList;
openReadList = newfh;
} /* if */
else
{
newfh->next = openWriteList;
openWriteList = newfh;
} /* else */
__PHYSFS_platformReleaseMutex(stateLock);
memcpy(retval, io, sizeof (PHYSFS_Io));
retval->opaque = newfh;
return retval;
handleIo_dupe_failed:
if (newfh)
{
if (newfh->io != NULL) newfh->io->destroy(newfh->io);
if (newfh->buffer != NULL) allocator.Free(newfh->buffer);
allocator.Free(newfh);
} /* if */
return NULL;
} /* handleIo_duplicate */
static int handleIo_flush(PHYSFS_Io *io)
{
return PHYSFS_flush((PHYSFS_File *) io->opaque);
} /* handleIo_flush */
static void handleIo_destroy(PHYSFS_Io *io)
{
if (io->opaque != NULL)
PHYSFS_close((PHYSFS_File *) io->opaque);
allocator.Free(io);
} /* handleIo_destroy */
static const PHYSFS_Io __PHYSFS_handleIoInterface =
{
handleIo_read,
handleIo_write,
handleIo_seek,
handleIo_tell,
handleIo_length,
handleIo_duplicate,
handleIo_flush,
handleIo_destroy,
NULL
};
static PHYSFS_Io *__PHYSFS_createHandleIo(PHYSFS_File *f)
{
PHYSFS_Io *io = (PHYSFS_Io *) allocator.Malloc(sizeof (PHYSFS_Io));
565
BAIL_IF_MACRO(!io, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
566
567
568
569
570
memcpy(io, &__PHYSFS_handleIoInterface, sizeof (*io));
io->opaque = f;
return io;
} /* __PHYSFS_createHandleIo */
571
572
573
/* functions ... */
574
575
576
577
typedef struct
{
char **list;
PHYSFS_uint32 size;
578
PHYSFS_ErrorCode errcode;
579
580
581
582
583
584
585
586
} EnumStringListCallbackData;
static void enumStringListCallback(void *data, const char *str)
{
void *ptr;
char *newstr;
EnumStringListCallbackData *pecd = (EnumStringListCallbackData *) data;
587
if (pecd->errcode)
588
589
return;
590
591
ptr = allocator.Realloc(pecd->list, (pecd->size + 2) * sizeof (char *));
newstr = (char *) allocator.Malloc(strlen(str) + 1);
592
593
594
595
596
if (ptr != NULL)
pecd->list = (char **) ptr;
if ((ptr == NULL) || (newstr == NULL))
{
597
pecd->errcode = PHYSFS_ERR_OUT_OF_MEMORY;
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
pecd->list[pecd->size] = NULL;
PHYSFS_freeList(pecd->list);
return;
} /* if */
strcpy(newstr, str);
pecd->list[pecd->size] = newstr;
pecd->size++;
} /* enumStringListCallback */
static char **doEnumStringList(void (*func)(PHYSFS_StringCallback, void *))
{
EnumStringListCallbackData ecd;
memset(&ecd, '\0', sizeof (ecd));
613
ecd.list = (char **) allocator.Malloc(sizeof (char *));
614
BAIL_IF_MACRO(!ecd.list, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
615
func(enumStringListCallback, &ecd);
616
617
618
619
620
621
622
if (ecd.errcode)
{
__PHYSFS_setError(ecd.errcode);
return NULL;
} /* if */
623
ecd.list[ecd.size] = NULL;
624
return ecd.list;
625
626
627
} /* doEnumStringList */
628
static void __PHYSFS_bubble_sort(void *a, PHYSFS_uint32 lo, PHYSFS_uint32 hi,
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
int (*cmpfn)(void *, PHYSFS_uint32, PHYSFS_uint32),
void (*swapfn)(void *, PHYSFS_uint32, PHYSFS_uint32))
{
PHYSFS_uint32 i;
int sorted;
do
{
sorted = 1;
for (i = lo; i < hi; i++)
{
if (cmpfn(a, i, i + 1) > 0)
{
swapfn(a, i, i + 1);
sorted = 0;
} /* if */
} /* for */
} while (!sorted);
} /* __PHYSFS_bubble_sort */
650
static void __PHYSFS_quick_sort(void *a, PHYSFS_uint32 lo, PHYSFS_uint32 hi,
651
652
653
654
655
656
657
int (*cmpfn)(void *, PHYSFS_uint32, PHYSFS_uint32),
void (*swapfn)(void *, PHYSFS_uint32, PHYSFS_uint32))
{
PHYSFS_uint32 i;
PHYSFS_uint32 j;
PHYSFS_uint32 v;
658
if ((hi - lo) <= PHYSFS_QUICKSORT_THRESHOLD)
659
660
__PHYSFS_bubble_sort(a, lo, hi, cmpfn, swapfn);
else
661
662
{
i = (hi + lo) / 2;
663
664
if (cmpfn(a, lo, i) > 0) swapfn(a, lo, i);
665
666
667
668
669
670
671
672
673
674
675
676
if (cmpfn(a, lo, hi) > 0) swapfn(a, lo, hi);
if (cmpfn(a, i, hi) > 0) swapfn(a, i, hi);
j = hi - 1;
swapfn(a, i, j);
i = lo;
v = j;
while (1)
{
while(cmpfn(a, ++i, v) < 0) { /* do nothing */ }
while(cmpfn(a, --j, v) > 0) { /* do nothing */ }
if (j < i)
677
break;
678
679
swapfn(a, i, j);
} /* while */
680
681
if (i != (hi-1))
swapfn(a, i, hi-1);
682
683
684
__PHYSFS_quick_sort(a, lo, j, cmpfn, swapfn);
__PHYSFS_quick_sort(a, i+1, hi, cmpfn, swapfn);
} /* else */
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
} /* __PHYSFS_quick_sort */
void __PHYSFS_sort(void *entries, PHYSFS_uint32 max,
int (*cmpfn)(void *, PHYSFS_uint32, PHYSFS_uint32),
void (*swapfn)(void *, PHYSFS_uint32, PHYSFS_uint32))
{
/*
* Quicksort w/ Bubblesort fallback algorithm inspired by code from here:
* http://www.cs.ubc.ca/spider/harrison/Java/sorting-demo.html
*/
__PHYSFS_quick_sort(entries, 0, max - 1, cmpfn, swapfn);
} /* __PHYSFS_sort */
700
static ErrState *findErrorForCurrentThread(void)
701
{
702
ErrState *i;
703
void *tid;
704
705
if (errorLock != NULL)
706
707
__PHYSFS_platformGrabMutex(errorLock);
708
if (errorStates != NULL)
709
{
710
tid = __PHYSFS_platformGetThreadID();
711
712
for (i = errorStates; i != NULL; i = i->next)
713
714
{
if (i->tid == tid)
715
{
716
717
if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
718
return i;
719
} /* if */
720
721
} /* for */
} /* if */
722
723
if (errorLock != NULL)
724
__PHYSFS_platformReleaseMutex(errorLock);
725
726
return NULL; /* no error available. */
727
728
729
} /* findErrorForCurrentThread */
730
void __PHYSFS_setError(const PHYSFS_ErrorCode errcode)
731
{
732
ErrState *err;
733
734
if (!errcode)
735
736
737
return;
err = findErrorForCurrentThread();
738
739
if (err == NULL)
{
740
err = (ErrState *) allocator.Malloc(sizeof (ErrState));
741
742
743
if (err == NULL)
return; /* uhh...? */
744
memset(err, '\0', sizeof (ErrState));
745
err->tid = __PHYSFS_platformGetThreadID();
746
747
748
749
if (errorLock != NULL)
__PHYSFS_platformGrabMutex(errorLock);
750
751
err->next = errorStates;
errorStates = err;
752
753
754
if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
755
756
} /* if */
757
err->code = errcode;
758
} /* __PHYSFS_setError */
759
760
761
PHYSFS_ErrorCode PHYSFS_getLastErrorCode(void)
762
{
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
ErrState *err = findErrorForCurrentThread();
const PHYSFS_ErrorCode retval = (err) ? err->code : PHYSFS_ERR_OK;
if (err)
err->code = PHYSFS_ERR_OK;
return retval;
} /* PHYSFS_getLastErrorCode */
PHYSFS_DECL const char *PHYSFS_getErrorByCode(PHYSFS_ErrorCode code)
{
switch (code)
{
case PHYSFS_ERR_OK: return "no error";
case PHYSFS_ERR_OTHER_ERROR: return "unknown error";
case PHYSFS_ERR_OUT_OF_MEMORY: return "out of memory";
case PHYSFS_ERR_NOT_INITIALIZED: return "not initialized";
case PHYSFS_ERR_IS_INITIALIZED: return "already initialized";
case PHYSFS_ERR_ARGV0_IS_NULL: return "argv[0] is NULL";
case PHYSFS_ERR_UNSUPPORTED: return "unsupported";
case PHYSFS_ERR_PAST_EOF: return "past end of file";
case PHYSFS_ERR_FILES_STILL_OPEN: return "files still open";
case PHYSFS_ERR_INVALID_ARGUMENT: return "invalid argument";
case PHYSFS_ERR_NOT_MOUNTED: return "not mounted";
case PHYSFS_ERR_NO_SUCH_PATH: return "no such path";
case PHYSFS_ERR_SYMLINK_FORBIDDEN: return "symlinks are forbidden";
case PHYSFS_ERR_NO_WRITE_DIR: return "write directory is not set";
case PHYSFS_ERR_OPEN_FOR_READING: return "file open for reading";
case PHYSFS_ERR_OPEN_FOR_WRITING: return "file open for writing";
case PHYSFS_ERR_NOT_A_FILE: return "not a file";
case PHYSFS_ERR_READ_ONLY: return "read-only filesystem";
case PHYSFS_ERR_CORRUPT: return "corrupted";
case PHYSFS_ERR_SYMLINK_LOOP: return "infinite symbolic link loop";
case PHYSFS_ERR_IO: return "i/o error";
case PHYSFS_ERR_PERMISSION: return "permission denied";
case PHYSFS_ERR_NO_SPACE: return "no space available for writing";
case PHYSFS_ERR_BAD_FILENAME: return "filename is illegal or insecure";
case PHYSFS_ERR_BUSY: return "tried to modify a file the OS needs";
case PHYSFS_ERR_DIR_NOT_EMPTY: return "directory isn't empty";
case PHYSFS_ERR_OS_ERROR: return "OS reported an error";
} /* switch */
return NULL; /* don't know this error code. */
} /* PHYSFS_getErrorByCode */
void PHYSFS_setErrorCode(PHYSFS_ErrorCode code)
{
__PHYSFS_setError(code);
} /* PHYSFS_setErrorCode */
812
813
814
815
816
817
const char *PHYSFS_getLastError(void)
{
const PHYSFS_ErrorCode err = PHYSFS_getLastErrorCode();
return (err) ? PHYSFS_getErrorByCode(err) : NULL;
818
819
820
821
} /* PHYSFS_getLastError */
/* MAKE SURE that errorLock is held before calling this! */
822
static void freeErrorStates(void)
823
{
824
825
ErrState *i;
ErrState *next;
826
827
for (i = errorStates; i != NULL; i = next)
828
{
829
next = i->next;
830
allocator.Free(i);
831
} /* for */
832
833
834
errorStates = NULL;
} /* freeErrorStates */
835
836
837
838
839
840
841
842
843
844
845
846
847
void PHYSFS_getLinkedVersion(PHYSFS_Version *ver)
{
if (ver != NULL)
{
ver->major = PHYSFS_VER_MAJOR;
ver->minor = PHYSFS_VER_MINOR;
ver->patch = PHYSFS_VER_PATCH;
} /* if */
} /* PHYSFS_getLinkedVersion */
848
849
static const char *find_filename_extension(const char *fname)
{
850
851
const char *retval = NULL;
if (fname != NULL)
852
{
853
854
const char *p = strchr(fname, '.');
retval = p;
855
856
857
858
859
860
861
862
863
864
865
while (p != NULL)
{
p = strchr(p + 1, '.');
if (p != NULL)
retval = p;
} /* while */
if (retval != NULL)
retval++; /* skip '.' */
} /* if */
866
867
return retval;
868
869
870
} /* find_filename_extension */
871
static DirHandle *tryOpenDir(PHYSFS_Io *io, const PHYSFS_Archiver *funcs,
872
const char *d, int forWriting)
873
874
{
DirHandle *retval = NULL;
875
876
877
void *opaque = NULL;
if (io != NULL)
878
BAIL_IF_MACRO(!io->seek(io, 0), ERRPASS, NULL);
879
880
opaque = funcs->openArchive(io, d, forWriting);
881
if (opaque != NULL)
882
{
883
884
885
886
retval = (DirHandle *) allocator.Malloc(sizeof (DirHandle));
if (retval == NULL)
funcs->dirClose(opaque);
else
887
{
888
889
890
891
892
memset(retval, '\0', sizeof (DirHandle));
retval->mountPoint = NULL;
retval->funcs = funcs;
retval->opaque = opaque;
} /* else */
893
894
} /* if */
895
return retval;
896
897
898
} /* tryOpenDir */
899
static DirHandle *openDirectory(PHYSFS_Io *io, const char *d, int forWriting)
900
{
901
DirHandle *retval = NULL;
902
const PHYSFS_Archiver **i;
903
const char *ext;
904
905
assert((io != NULL) || (d != NULL));
906
907
908
909
910
911
912
913
914
if (io == NULL)
{
/* DIR gets first shot (unlike the rest, it doesn't deal with files). */
retval = tryOpenDir(io, &__PHYSFS_Archiver_DIR, d, forWriting);
if (retval != NULL)
return retval;
io = __PHYSFS_createNativeIo(d, forWriting ? 'w' : 'r');
915
BAIL_IF_MACRO(!io, ERRPASS, 0);
916
} /* if */
917
918
919
ext = find_filename_extension(d);
if (ext != NULL)
920
{
921
/* Look for archivers with matching file extensions first... */
922
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
923
{
924
if (__PHYSFS_stricmpASCII(ext, (*i)->info->extension) == 0)
925
retval = tryOpenDir(io, *i, d, forWriting);
926
927
928
} /* for */
/* failing an exact file extension match, try all the others... */
929
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
930
{
931
if (__PHYSFS_stricmpASCII(ext, (*i)->info->extension) != 0)
932
retval = tryOpenDir(io, *i, d, forWriting);
933
934
935
936
937
} /* for */
} /* if */
else /* no extension? Try them all. */
{
938
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
939
retval = tryOpenDir(io, *i, d, forWriting);
940
} /* else */
941
942
BAIL_IF_MACRO(!retval, PHYSFS_ERR_UNSUPPORTED, NULL);
943
return retval;
944
945
946
} /* openDirectory */
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
/*
* Make a platform-independent path string sane. Doesn't actually check the
* file hierarchy, it just cleans up the string.
* (dst) must be a buffer at least as big as (src), as this is where the
* cleaned up string is deposited.
* If there are illegal bits in the path (".." entries, etc) then we
* return zero and (dst) is undefined. Non-zero if the path was sanitized.
*/
static int sanitizePlatformIndependentPath(const char *src, char *dst)
{
char *prev;
char ch;
while (*src == '/') /* skip initial '/' chars... */
src++;
prev = dst;
do
{
ch = *(src++);
if ((ch == ':') || (ch == '\\')) /* illegal chars in a physfs path. */
969
BAIL_MACRO(PHYSFS_ERR_BAD_FILENAME, 0);
970
971
972
973
974
if (ch == '/') /* path separator. */
{
*dst = '\0'; /* "." and ".." are illegal pathnames. */
if ((strcmp(prev, ".") == 0) || (strcmp(prev, "..") == 0))
975
BAIL_MACRO(PHYSFS_ERR_BAD_FILENAME, 0);
976
977
978
979
980
981
982
983
984
985
986
987
988
while (*src == '/') /* chop out doubles... */
src++;
if (*src == '\0') /* ends with a pathsep? */
break; /* we're done, don't add final pathsep to dst. */
prev = dst + 1;
} /* if */
*(dst++) = ch;
} while (ch != '\0');
989
return 1;
990
991
992
} /* sanitizePlatformIndependentPath */
993
994
995
996
997
998
999
1000
/*
* Figure out if (fname) is part of (h)'s mountpoint. (fname) must be an
* output from sanitizePlatformIndependentPath(), so that it is in a known
* state.
*
* This only finds legitimate segments of a mountpoint. If the mountpoint is
* "/a/b/c" and (fname) is "/a/b/c", "/", or "/a/b/c/d", then the results are
* all zero. "/a/b" will succeed, though.