/
physfs.c
2300 lines (1834 loc) · 62.5 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
12
/* !!! FIXME: ERR_PAST_EOF shouldn't trigger for reads. Just return zero. */
13
14
15
16
17
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "physfs.h"
18
19
20
#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
21
22
23
typedef struct __PHYSFS_DIRHANDLE__
{
24
25
void *opaque; /* Instance data unique to the archiver. */
char *dirName; /* Path to archive in platform-dependent notation. */
26
char *mountPoint; /* Mountpoint in virtual file tree. */
27
28
const PHYSFS_Archiver *funcs; /* Ptr to archiver info for this handle. */
struct __PHYSFS_DIRHANDLE__ *next; /* linked list stuff. */
29
30
31
} DirHandle;
32
33
34
35
36
37
38
39
40
41
42
43
44
45
typedef struct __PHYSFS_FILEHANDLE__
{
void *opaque; /* Instance data unique to the archiver for this file. */
PHYSFS_uint8 forReading; /* Non-zero if reading, zero if write/append */
const DirHandle *dirHandle; /* Archiver instance that created this */
const PHYSFS_Archiver *funcs; /* Ptr to archiver info for this handle. */
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;
46
47
typedef struct __PHYSFS_ERRMSGTYPE__
{
48
void *tid;
49
50
51
52
53
int errorAvailable;
char errorString[80];
struct __PHYSFS_ERRMSGTYPE__ *next;
} ErrMsg;
54
55
/* The various i/o drivers...some of these may not be compiled in. */
56
57
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_ZIP;
extern const PHYSFS_Archiver __PHYSFS_Archiver_ZIP;
58
59
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_LZMA;
extern const PHYSFS_Archiver __PHYSFS_Archiver_LZMA;
60
61
62
63
64
65
66
67
68
69
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;
70
extern const PHYSFS_Archiver __PHYSFS_Archiver_DIR;
71
72
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_ISO9660;
extern const PHYSFS_Archiver __PHYSFS_Archiver_ISO9660;
73
74
75
static const PHYSFS_ArchiveInfo *supported_types[] =
76
77
{
#if (defined PHYSFS_SUPPORTS_ZIP)
78
&__PHYSFS_ArchiveInfo_ZIP,
79
#endif
80
#if (defined PHYSFS_SUPPORTS_7Z)
81
82
&__PHYSFS_ArchiveInfo_LZMA,
#endif
83
84
85
#if (defined PHYSFS_SUPPORTS_GRP)
&__PHYSFS_ArchiveInfo_GRP,
#endif
86
87
88
#if (defined PHYSFS_SUPPORTS_QPAK)
&__PHYSFS_ArchiveInfo_QPAK,
#endif
89
90
91
92
93
94
#if (defined PHYSFS_SUPPORTS_HOG)
&__PHYSFS_ArchiveInfo_HOG,
#endif
#if (defined PHYSFS_SUPPORTS_MVL)
&__PHYSFS_ArchiveInfo_MVL,
#endif
95
96
#if (defined PHYSFS_SUPPORTS_WAD)
&__PHYSFS_ArchiveInfo_WAD,
97
#endif
98
#if (defined PHYSFS_SUPPORTS_ISO9660)
99
&__PHYSFS_ArchiveInfo_ISO9660,
100
#endif
101
102
103
NULL
};
104
static const PHYSFS_Archiver *archivers[] =
105
{
106
&__PHYSFS_Archiver_DIR,
107
#if (defined PHYSFS_SUPPORTS_ZIP)
108
&__PHYSFS_Archiver_ZIP,
109
#endif
110
#if (defined PHYSFS_SUPPORTS_7Z)
111
112
&__PHYSFS_Archiver_LZMA,
#endif
113
#if (defined PHYSFS_SUPPORTS_GRP)
114
&__PHYSFS_Archiver_GRP,
115
#endif
116
#if (defined PHYSFS_SUPPORTS_QPAK)
117
&__PHYSFS_Archiver_QPAK,
118
#endif
119
#if (defined PHYSFS_SUPPORTS_HOG)
120
&__PHYSFS_Archiver_HOG,
121
122
#endif
#if (defined PHYSFS_SUPPORTS_MVL)
123
&__PHYSFS_Archiver_MVL,
124
#endif
125
#if (defined PHYSFS_SUPPORTS_WAD)
126
&__PHYSFS_Archiver_WAD,
127
#endif
128
#if (defined PHYSFS_SUPPORTS_ISO9660)
129
&__PHYSFS_Archiver_ISO9660,
130
#endif
131
132
NULL
};
133
134
135
136
137
138
/* General PhysicsFS state ... */
static int initialized = 0;
static ErrMsg *errorMessages = NULL;
139
140
141
142
static DirHandle *searchPath = NULL;
static DirHandle *writeDir = NULL;
static FileHandle *openWriteList = NULL;
static FileHandle *openReadList = NULL;
143
144
145
146
static char *baseDir = NULL;
static char *userDir = NULL;
static int allowSymLinks = 0;
147
148
149
/* mutexes ... */
static void *errorLock = NULL; /* protects error message list. */
static void *stateLock = NULL; /* protects other PhysFS static state. */
150
151
152
/* allocator ... */
static int externalAllocator = 0;
153
PHYSFS_Allocator allocator;
154
155
156
157
/* functions ... */
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
typedef struct
{
char **list;
PHYSFS_uint32 size;
const char *errorstr;
} EnumStringListCallbackData;
static void enumStringListCallback(void *data, const char *str)
{
void *ptr;
char *newstr;
EnumStringListCallbackData *pecd = (EnumStringListCallbackData *) data;
if (pecd->errorstr)
return;
174
175
ptr = allocator.Realloc(pecd->list, (pecd->size + 2) * sizeof (char *));
newstr = (char *) allocator.Malloc(strlen(str) + 1);
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
if (ptr != NULL)
pecd->list = (char **) ptr;
if ((ptr == NULL) || (newstr == NULL))
{
pecd->errorstr = ERR_OUT_OF_MEMORY;
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));
197
ecd.list = (char **) allocator.Malloc(sizeof (char *));
198
199
200
201
BAIL_IF_MACRO(ecd.list == NULL, ERR_OUT_OF_MEMORY, NULL);
func(enumStringListCallback, &ecd);
BAIL_IF_MACRO(ecd.errorstr != NULL, ecd.errorstr, NULL);
ecd.list[ecd.size] = NULL;
202
return ecd.list;
203
204
205
} /* doEnumStringList */
206
static void __PHYSFS_bubble_sort(void *a, PHYSFS_uint32 lo, PHYSFS_uint32 hi,
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
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 */
228
static void __PHYSFS_quick_sort(void *a, PHYSFS_uint32 lo, PHYSFS_uint32 hi,
229
230
231
232
233
234
235
int (*cmpfn)(void *, PHYSFS_uint32, PHYSFS_uint32),
void (*swapfn)(void *, PHYSFS_uint32, PHYSFS_uint32))
{
PHYSFS_uint32 i;
PHYSFS_uint32 j;
PHYSFS_uint32 v;
236
if ((hi - lo) <= PHYSFS_QUICKSORT_THRESHOLD)
237
238
__PHYSFS_bubble_sort(a, lo, hi, cmpfn, swapfn);
else
239
240
{
i = (hi + lo) / 2;
241
242
if (cmpfn(a, lo, i) > 0) swapfn(a, lo, i);
243
244
245
246
247
248
249
250
251
252
253
254
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)
255
break;
256
257
swapfn(a, i, j);
} /* while */
258
259
if (i != (hi-1))
swapfn(a, i, hi-1);
260
261
262
__PHYSFS_quick_sort(a, lo, j, cmpfn, swapfn);
__PHYSFS_quick_sort(a, i+1, hi, cmpfn, swapfn);
} /* else */
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
} /* __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 */
278
279
280
static ErrMsg *findErrorForCurrentThread(void)
{
ErrMsg *i;
281
void *tid;
282
283
if (errorLock != NULL)
284
285
__PHYSFS_platformGrabMutex(errorLock);
286
287
if (errorMessages != NULL)
{
288
tid = __PHYSFS_platformGetThreadID();
289
290
291
292
for (i = errorMessages; i != NULL; i = i->next)
{
if (i->tid == tid)
293
{
294
295
if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
296
return i;
297
} /* if */
298
299
} /* for */
} /* if */
300
301
if (errorLock != NULL)
302
__PHYSFS_platformReleaseMutex(errorLock);
303
304
return NULL; /* no error available. */
305
306
307
} /* findErrorForCurrentThread */
308
void __PHYSFS_setError(const char *str)
309
{
310
311
312
313
314
315
ErrMsg *err;
if (str == NULL)
return;
err = findErrorForCurrentThread();
316
317
318
if (err == NULL)
{
319
err = (ErrMsg *) allocator.Malloc(sizeof (ErrMsg));
320
321
322
if (err == NULL)
return; /* uhh...? */
323
memset((void *) err, '\0', sizeof (ErrMsg));
324
err->tid = __PHYSFS_platformGetThreadID();
325
326
327
328
if (errorLock != NULL)
__PHYSFS_platformGrabMutex(errorLock);
329
330
err->next = errorMessages;
errorMessages = err;
331
332
333
if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
334
335
336
337
338
} /* if */
err->errorAvailable = 1;
strncpy(err->errorString, str, sizeof (err->errorString));
err->errorString[sizeof (err->errorString) - 1] = '\0';
339
} /* __PHYSFS_setError */
340
341
342
343
344
345
346
const char *PHYSFS_getLastError(void)
{
ErrMsg *err = findErrorForCurrentThread();
if ((err == NULL) || (!err->errorAvailable))
347
return NULL;
348
349
err->errorAvailable = 0;
350
return err->errorString;
351
352
353
354
} /* PHYSFS_getLastError */
/* MAKE SURE that errorLock is held before calling this! */
355
356
357
358
359
360
361
static void freeErrorMessages(void)
{
ErrMsg *i;
ErrMsg *next;
for (i = errorMessages; i != NULL; i = next)
{
362
next = i->next;
363
allocator.Free(i);
364
} /* for */
365
366
errorMessages = NULL;
367
368
369
} /* freeErrorMessages */
370
371
372
373
374
375
376
377
378
379
380
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 */
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
static const char *find_filename_extension(const char *fname)
{
const char *retval = strchr(fname, '.');
const char *p = retval;
while (p != NULL)
{
p = strchr(p + 1, '.');
if (p != NULL)
retval = p;
} /* while */
if (retval != NULL)
retval++; /* skip '.' */
396
return retval;
397
398
399
} /* find_filename_extension */
400
401
static DirHandle *tryOpenDir(const PHYSFS_Archiver *funcs,
const char *d, int forWriting)
402
403
{
DirHandle *retval = NULL;
404
if (funcs->isArchive(d, forWriting))
405
{
406
void *opaque = funcs->openArchive(d, forWriting);
407
408
if (opaque != NULL)
{
409
retval = (DirHandle *) allocator.Malloc(sizeof (DirHandle));
410
if (retval == NULL)
411
funcs->dirClose(opaque);
412
413
else
{
414
memset(retval, '\0', sizeof (DirHandle));
415
retval->mountPoint = NULL;
416
retval->funcs = funcs;
417
418
419
420
421
retval->opaque = opaque;
} /* else */
} /* if */
} /* if */
422
return retval;
423
424
425
} /* tryOpenDir */
426
427
static DirHandle *openDirectory(const char *d, int forWriting)
{
428
DirHandle *retval = NULL;
429
const PHYSFS_Archiver **i;
430
const char *ext;
431
432
433
BAIL_IF_MACRO(!__PHYSFS_platformExists(d), ERR_NO_SUCH_FILE, NULL);
434
435
ext = find_filename_extension(d);
if (ext != NULL)
436
{
437
/* Look for archivers with matching file extensions first... */
438
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
439
{
440
if (__PHYSFS_stricmpASCII(ext, (*i)->info->extension) == 0)
441
retval = tryOpenDir(*i, d, forWriting);
442
443
444
} /* for */
/* failing an exact file extension match, try all the others... */
445
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
446
{
447
if (__PHYSFS_stricmpASCII(ext, (*i)->info->extension) != 0)
448
retval = tryOpenDir(*i, d, forWriting);
449
450
451
452
453
} /* for */
} /* if */
else /* no extension? Try them all. */
{
454
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
455
retval = tryOpenDir(*i, d, forWriting);
456
} /* else */
457
458
BAIL_IF_MACRO(retval == NULL, ERR_UNSUPPORTED_ARCHIVE, NULL);
459
return retval;
460
461
462
} /* openDirectory */
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
/*
* 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. */
BAIL_MACRO(ERR_INSECURE_FNAME, 0);
if (ch == '/') /* path separator. */
{
*dst = '\0'; /* "." and ".." are illegal pathnames. */
if ((strcmp(prev, ".") == 0) || (strcmp(prev, "..") == 0))
BAIL_MACRO(ERR_INSECURE_FNAME, 0);
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');
505
return 1;
506
507
508
} /* sanitizePlatformIndependentPath */
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
/*
* 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.
*/
static int partOfMountPoint(DirHandle *h, char *fname)
{
/* !!! FIXME: This code feels gross. */
int rc;
size_t len, mntpntlen;
if (h->mountPoint == NULL)
525
return 0;
526
else if (*fname == '\0')
527
return 1;
528
529
530
531
len = strlen(fname);
mntpntlen = strlen(h->mountPoint);
if (len > mntpntlen) /* can't be a subset of mountpoint. */
532
return 0;
533
534
535
/* if true, must be not a match or a complete match, but not a subset. */
if ((len + 1) == mntpntlen)
536
return 0;
537
538
539
rc = strncmp(fname, h->mountPoint, len); /* !!! FIXME: case insensitive? */
if (rc != 0)
540
return 0; /* not a match. */
541
542
/* make sure /a/b matches /a/b/ and not /a/bc ... */
543
return h->mountPoint[len] == '/';
544
545
546
} /* partOfMountPoint */
547
548
549
static DirHandle *createDirHandle(const char *newDir,
const char *mountPoint,
int forWriting)
550
551
{
DirHandle *dirHandle = NULL;
552
char *tmpmntpnt = NULL;
553
554
GOTO_IF_MACRO(!newDir, ERR_INVALID_ARGUMENT, badDirHandle);
555
556
if (mountPoint != NULL)
{
557
558
559
560
const size_t len = strlen(mountPoint) + 1;
tmpmntpnt = (char *) __PHYSFS_smallAlloc(len);
GOTO_IF_MACRO(!tmpmntpnt, ERR_OUT_OF_MEMORY, badDirHandle);
if (!sanitizePlatformIndependentPath(mountPoint, tmpmntpnt))
561
goto badDirHandle;
562
mountPoint = tmpmntpnt; /* sanitized version. */
563
} /* if */
564
565
dirHandle = openDirectory(newDir, forWriting);
566
GOTO_IF_MACRO(!dirHandle, NULL, badDirHandle);
567
568
dirHandle->dirName = (char *) allocator.Malloc(strlen(newDir) + 1);
569
570
571
572
573
GOTO_IF_MACRO(!dirHandle->dirName, ERR_OUT_OF_MEMORY, badDirHandle);
strcpy(dirHandle->dirName, newDir);
if ((mountPoint != NULL) && (*mountPoint != '\0'))
{
574
dirHandle->mountPoint = (char *)allocator.Malloc(strlen(mountPoint)+2);
575
576
577
578
579
GOTO_IF_MACRO(!dirHandle->mountPoint, ERR_OUT_OF_MEMORY, badDirHandle);
strcpy(dirHandle->mountPoint, mountPoint);
strcat(dirHandle->mountPoint, "/");
} /* if */
580
__PHYSFS_smallFree(tmpmntpnt);
581
return dirHandle;
582
583
584
badDirHandle:
if (dirHandle != NULL)
585
{
586
dirHandle->funcs->dirClose(dirHandle->opaque);
587
588
589
allocator.Free(dirHandle->dirName);
allocator.Free(dirHandle->mountPoint);
allocator.Free(dirHandle);
590
} /* if */
591
592
__PHYSFS_smallFree(tmpmntpnt);
593
return NULL;
594
} /* createDirHandle */
595
596
597
/* MAKE SURE you've got the stateLock held before calling this! */
598
static int freeDirHandle(DirHandle *dh, FileHandle *openList)
599
{
600
FileHandle *i;
601
602
if (dh == NULL)
603
return 1;
604
605
for (i = openList; i != NULL; i = i->next)
606
BAIL_IF_MACRO(i->dirHandle == dh, ERR_FILES_STILL_OPEN, 0);
607
608
dh->funcs->dirClose(dh->opaque);
609
610
611
allocator.Free(dh->dirName);
allocator.Free(dh->mountPoint);
allocator.Free(dh);
612
return 1;
613
} /* freeDirHandle */
614
615
616
static char *calculateUserDir(void)
617
{
618
619
620
621
622
623
624
625
char *retval = __PHYSFS_platformGetUserDir();
if (retval != NULL)
{
/* make sure it really exists and is normalized. */
char *ptr = __PHYSFS_platformRealPath(retval);
allocator.Free(retval);
retval = ptr;
} /* if */
626
627
if (retval == NULL)
628
629
630
{
const char *dirsep = PHYSFS_getDirSeparator();
const char *uname = __PHYSFS_platformGetUserName();
631
const char *str = (uname != NULL) ? uname : "default";
632
633
634
retval = (char *) allocator.Malloc(strlen(baseDir) + strlen(str) +
strlen(dirsep) + 6);
635
636
637
638
if (retval == NULL)
__PHYSFS_setError(ERR_OUT_OF_MEMORY);
else
639
sprintf(retval, "%susers%s%s", baseDir, dirsep, str);
640
641
allocator.Free((void *) uname);
642
643
} /* else */
644
return retval;
645
646
647
} /* calculateUserDir */
648
649
650
651
652
653
static int appendDirSep(char **dir)
{
const char *dirsep = PHYSFS_getDirSeparator();
char *ptr;
if (strcmp((*dir + strlen(*dir)) - strlen(dirsep), dirsep) == 0)
654
return 1;
655
656
ptr = (char *) allocator.Realloc(*dir, strlen(*dir) + strlen(dirsep) + 1);
657
658
if (!ptr)
{
659
allocator.Free(*dir);
660
return 0;
661
662
663
664
} /* if */
strcat(ptr, dirsep);
*dir = ptr;
665
return 1;
666
667
668
} /* appendDirSep */
669
670
static char *calculateBaseDir(const char *argv0)
{
671
672
673
char *retval = NULL;
const char *dirsep = NULL;
char *ptr = NULL;
674
675
/* Give the platform layer first shot at this. */
676
677
retval = __PHYSFS_platformCalcBaseDir(argv0);
if (retval != NULL)
678
return retval;
679
680
681
/* We need argv0 to go on. */
BAIL_IF_MACRO(argv0 == NULL, ERR_ARGV0_IS_NULL, NULL);
682
683
684
685
686
dirsep = PHYSFS_getDirSeparator();
if (strlen(dirsep) == 1) /* fast path. */
ptr = strrchr(argv0, *dirsep);
else
687
{
688
689
ptr = strstr(argv0, dirsep);
if (ptr != NULL)
690
{
691
692
693
694
695
696
697
698
char *p = ptr;
while (p != NULL)
{
ptr = p;
p = strstr(p + 1, dirsep);
} /* while */
} /* if */
} /* else */
699
700
701
702
if (ptr != NULL)
{
size_t size = (size_t) (ptr - argv0);
703
retval = (char *) allocator.Malloc(size + 1);
704
705
706
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
memcpy(retval, argv0, size);
retval[size] = '\0';
707
return retval;
708
709
} /* if */
710
711
/* argv0 wasn't helpful. */
BAIL_MACRO(ERR_INVALID_ARGUMENT, NULL);
712
713
714
} /* calculateBaseDir */
715
716
717
718
719
720
721
722
723
724
static int initializeMutexes(void)
{
errorLock = __PHYSFS_platformCreateMutex();
if (errorLock == NULL)
goto initializeMutexes_failed;
stateLock = __PHYSFS_platformCreateMutex();
if (stateLock == NULL)
goto initializeMutexes_failed;
725
return 1; /* success. */
726
727
728
729
730
731
732
733
734
initializeMutexes_failed:
if (errorLock != NULL)
__PHYSFS_platformDestroyMutex(errorLock);
if (stateLock != NULL)
__PHYSFS_platformDestroyMutex(stateLock);
errorLock = stateLock = NULL;
735
return 0; /* failed. */
736
737
738
} /* initializeMutexes */
739
740
static void setDefaultAllocator(void);
741
742
int PHYSFS_init(const char *argv0)
{
743
744
char *ptr;
745
BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0);
746
747
748
749
if (!externalAllocator)
setDefaultAllocator();
750
751
if (allocator.Init != NULL)
BAIL_IF_MACRO(!allocator.Init(), NULL, 0);
752
753
BAIL_IF_MACRO(!__PHYSFS_platformInit(), NULL, 0);
754
755
756
BAIL_IF_MACRO(!initializeMutexes(), NULL, 0);
757
baseDir = calculateBaseDir(argv0);
758
BAIL_IF_MACRO(baseDir == NULL, NULL, 0);
759
760
/* !!! FIXME: only call this if we got this from argv0 (unreliable). */
761
ptr = __PHYSFS_platformRealPath(baseDir);
762
allocator.Free(baseDir);
763
764
765
BAIL_IF_MACRO(ptr == NULL, NULL, 0);
baseDir = ptr;
766
BAIL_IF_MACRO(!appendDirSep(&baseDir), NULL, 0);
767
768
userDir = calculateUserDir();
769
if ((userDir == NULL) || (!appendDirSep(&userDir)))
770
{
771
allocator.Free(baseDir);
772
baseDir = NULL;
773
return 0;
774
775
} /* if */
776
initialized = 1;
777
778
779
/* This makes sure that the error subsystem is initialized. */
__PHYSFS_setError(PHYSFS_getLastError());
780
781
return 1;
782
783
784
} /* PHYSFS_init */
785
/* MAKE SURE you hold stateLock before calling this! */
786
static int closeFileHandleList(FileHandle **list)
787
{
788
789
FileHandle *i;
FileHandle *next = NULL;
790
791
792
793
for (i = *list; i != NULL; i = next)
{
next = i->next;
794
if (!i->funcs->fileClose(i->opaque))
795
796
{
*list = i;
797
return 0;
798
799
} /* if */
800
allocator.Free(i);
801
802
803
} /* for */
*list = NULL;
804
return 1;
805
} /* closeFileHandleList */
806
807
808
/* MAKE SURE you hold the stateLock before calling this! */
809
810
static void freeSearchPath(void)
{
811
812
DirHandle *i;
DirHandle *next = NULL;
813
814
815
closeFileHandleList(&openReadList);
816
817
818
819
if (searchPath != NULL)
{
for (i = searchPath; i != NULL; i = next)
{
820
next = i->next;
821
freeDirHandle(i, openReadList);
822
823
824
825
826
827
} /* for */
searchPath = NULL;
} /* if */
} /* freeSearchPath */
828
int PHYSFS_deinit(void)
829
830
{
BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0);
831
BAIL_IF_MACRO(!__PHYSFS_platformDeinit(), NULL, 0);
832
833
closeFileHandleList(&openWriteList);
834
835
BAIL_IF_MACRO(!PHYSFS_setWriteDir(NULL), ERR_FILES_STILL_OPEN, 0);
836
837
838
freeSearchPath();
freeErrorMessages();
839
if (baseDir != NULL)
840
{
841
allocator.Free(baseDir);
842
843
844
845
846
baseDir = NULL;
} /* if */
if (userDir != NULL)
{
847
allocator.Free(userDir);
848
849
userDir = NULL;
} /* if */
850
851
allowSymLinks = 0;
852
initialized = 0;
853
854
855
856
__PHYSFS_platformDestroyMutex(errorLock);
__PHYSFS_platformDestroyMutex(stateLock);
857
858
if (allocator.Deinit != NULL)
allocator.Deinit();
859
860
errorLock = stateLock = NULL;
861
return 1;
862
863
864
} /* PHYSFS_deinit */
865
866
int PHYSFS_isInit(void)
{
867
return initialized;
868
869
870
} /* PHYSFS_isInit */
871
872
const PHYSFS_ArchiveInfo **PHYSFS_supportedArchiveTypes(void)
{
873
return supported_types;
874
875
876
877
878
879
} /* PHYSFS_supportedArchiveTypes */
void PHYSFS_freeList(void *list)
{
void **i;
880
881
882
883
if (list != NULL)
{
for (i = (void **) list; *i != NULL; i++)
allocator.Free(*i);
884
885
886
allocator.Free(list);
} /* if */
887
888
889
890
891
} /* PHYSFS_freeList */
const char *PHYSFS_getDirSeparator(void)
{
892
return __PHYSFS_platformDirSeparator;
893
894
895
896
897
} /* PHYSFS_getDirSeparator */
char **PHYSFS_getCdRomDirs(void)
{
898
return doEnumStringList(__PHYSFS_platformDetectAvailableCDs);
899
900
901
} /* PHYSFS_getCdRomDirs */
902
903
904
905
906
907
void PHYSFS_getCdRomDirsCallback(PHYSFS_StringCallback callback, void *data)
{
__PHYSFS_platformDetectAvailableCDs(callback, data);
} /* PHYSFS_getCdRomDirsCallback */
908
909
const char *PHYSFS_getBaseDir(void)
{
910
return baseDir; /* this is calculated in PHYSFS_init()... */
911
912
913
914
915
} /* PHYSFS_getBaseDir */
const char *PHYSFS_getUserDir(void)
{
916
return userDir; /* this is calculated in PHYSFS_init()... */
917
918
919
920
921
} /* PHYSFS_getUserDir */
const char *PHYSFS_getWriteDir(void)
{
922
923
924
925
926
927
const char *retval = NULL;
__PHYSFS_platformGrabMutex(stateLock);
if (writeDir != NULL)
retval = writeDir->dirName;
__PHYSFS_platformReleaseMutex(stateLock);
928
929
return retval;
930
931
932
933
934
} /* PHYSFS_getWriteDir */
int PHYSFS_setWriteDir(const char *newDir)
{
935
936
937
938
int retval = 1;
__PHYSFS_platformGrabMutex(stateLock);
939
940
if (writeDir != NULL)
{
941
BAIL_IF_MACRO_MUTEX(!freeDirHandle(writeDir, openWriteList), NULL,
942
stateLock, 0);
943
944
945
writeDir = NULL;
} /* if */
946
947
if (newDir != NULL)
{
948
writeDir = createDirHandle(newDir, NULL, 1);
949
retval = (writeDir != NULL);
950
} /* if */
951
952
953
__PHYSFS_platformReleaseMutex(stateLock);
954
return retval;
955
956
957
} /* PHYSFS_setWriteDir */
958
int PHYSFS_mount(const char *newDir, const char *mountPoint, int appendToPath)
959
{
960
961
962
DirHandle *dh;
DirHandle *prev = NULL;
DirHandle *i;
963
964
BAIL_IF_MACRO(newDir == NULL, ERR_INVALID_ARGUMENT, 0);
965
966
967
if (mountPoint == NULL)
mountPoint = "/";
968
969
__PHYSFS_platformGrabMutex(stateLock);
970
971
972
973
974
for (i = searchPath; i != NULL; i = i->next)
{
/* already in search path? */
BAIL_IF_MACRO_MUTEX(strcmp(newDir, i->dirName)==0, NULL, stateLock, 1);
975
prev = i;
976
} /* for */
977
978
dh = createDirHandle(newDir, mountPoint, 0);
979
BAIL_IF_MACRO_MUTEX(dh == NULL, NULL, stateLock, 0);
980
981
982
983
if (appendToPath)
{
if (prev == NULL)
984
searchPath = dh;
985
else
986
prev->next = dh;
987
988
989
} /* if */
else
{
990
991
dh->next = searchPath;
searchPath = dh;
992
993
} /* else */
994
__PHYSFS_platformReleaseMutex(stateLock);
995
return 1;
996
997
998
999
1000
} /* PHYSFS_mount */
int PHYSFS_addToSearchPath(const char *newDir, int appendToPath)
{