/
physfs.c
2076 lines (1637 loc) · 56 KB
1
2
3
4
5
6
7
8
9
10
/**
* PhysicsFS; a portable, flexible file i/o abstraction.
*
* Documentation is in physfs.h. It's verbose, honest. :)
*
* Please see the file LICENSE in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
11
12
13
14
#if HAVE_CONFIG_H
# include <config.h>
#endif
15
16
17
18
19
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "physfs.h"
20
21
22
#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
23
24
25
typedef struct __PHYSFS_DIRHANDLE__
{
26
27
void *opaque; /* Instance data unique to the archiver. */
char *dirName; /* Path to archive in platform-dependent notation. */
28
char *mountPoint; /* Mountpoint in virtual file tree. */
29
30
const PHYSFS_Archiver *funcs; /* Ptr to archiver info for this handle. */
struct __PHYSFS_DIRHANDLE__ *next; /* linked list stuff. */
31
32
33
} DirHandle;
34
35
36
37
38
39
40
41
42
43
44
45
46
47
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;
48
49
typedef struct __PHYSFS_ERRMSGTYPE__
{
50
PHYSFS_uint64 tid;
51
52
53
54
55
int errorAvailable;
char errorString[80];
struct __PHYSFS_ERRMSGTYPE__ *next;
} ErrMsg;
56
57
/* The various i/o drivers... */
58
59
#if (defined PHYSFS_SUPPORTS_ZIP)
60
61
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_ZIP;
extern const PHYSFS_Archiver __PHYSFS_Archiver_ZIP;
62
#endif
64
#if (defined PHYSFS_SUPPORTS_GRP)
65
66
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_GRP;
extern const PHYSFS_Archiver __PHYSFS_Archiver_GRP;
69
#if (defined PHYSFS_SUPPORTS_QPAK)
70
71
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_QPAK;
extern const PHYSFS_Archiver __PHYSFS_Archiver_QPAK;
72
73
#endif
74
#if (defined PHYSFS_SUPPORTS_HOG)
75
76
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_HOG;
extern const PHYSFS_Archiver __PHYSFS_Archiver_HOG;
77
78
79
#endif
#if (defined PHYSFS_SUPPORTS_MVL)
80
81
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_MVL;
extern const PHYSFS_Archiver __PHYSFS_Archiver_MVL;
84
#if (defined PHYSFS_SUPPORTS_WAD)
85
86
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_WAD;
extern const PHYSFS_Archiver __PHYSFS_Archiver_WAD;
87
88
#endif
89
#if (defined PHYSFS_SUPPORTS_MIX)
90
91
extern const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_MIX;
extern const PHYSFS_Archiver __PHYSFS_Archiver_MIX;
92
93
#endif
94
extern const PHYSFS_Archiver __PHYSFS_Archiver_DIR;
97
static const PHYSFS_ArchiveInfo *supported_types[] =
98
99
{
#if (defined PHYSFS_SUPPORTS_ZIP)
100
&__PHYSFS_ArchiveInfo_ZIP,
101
102
#endif
103
104
105
106
#if (defined PHYSFS_SUPPORTS_GRP)
&__PHYSFS_ArchiveInfo_GRP,
#endif
107
108
109
110
#if (defined PHYSFS_SUPPORTS_QPAK)
&__PHYSFS_ArchiveInfo_QPAK,
#endif
111
112
113
114
115
116
117
118
#if (defined PHYSFS_SUPPORTS_HOG)
&__PHYSFS_ArchiveInfo_HOG,
#endif
#if (defined PHYSFS_SUPPORTS_MVL)
&__PHYSFS_ArchiveInfo_MVL,
#endif
119
120
121
122
#if (defined PHYSFS_SUPPORTS_WAD)
&__PHYSFS_ArchiveInfo_WAD,
#endif
123
124
125
#if (defined PHYSFS_SUPPORTS_MIX)
&__PHYSFS_ArchiveInfo_MIX,
#endif
127
128
129
NULL
};
130
static const PHYSFS_Archiver *archivers[] =
131
132
{
#if (defined PHYSFS_SUPPORTS_ZIP)
133
&__PHYSFS_Archiver_ZIP,
136
#if (defined PHYSFS_SUPPORTS_GRP)
137
&__PHYSFS_Archiver_GRP,
140
#if (defined PHYSFS_SUPPORTS_QPAK)
141
&__PHYSFS_Archiver_QPAK,
142
143
#endif
144
#if (defined PHYSFS_SUPPORTS_HOG)
145
&__PHYSFS_Archiver_HOG,
146
147
148
#endif
#if (defined PHYSFS_SUPPORTS_MVL)
149
&__PHYSFS_Archiver_MVL,
152
#if (defined PHYSFS_SUPPORTS_WAD)
153
&__PHYSFS_Archiver_WAD,
154
155
#endif
156
#if (defined PHYSFS_SUPPORTS_MIX)
157
&__PHYSFS_Archiver_MIX,
158
159
#endif
160
&__PHYSFS_Archiver_DIR,
161
162
NULL
};
166
167
168
/* General PhysicsFS state ... */
static int initialized = 0;
static ErrMsg *errorMessages = NULL;
169
170
171
172
static DirHandle *searchPath = NULL;
static DirHandle *writeDir = NULL;
static FileHandle *openWriteList = NULL;
static FileHandle *openReadList = NULL;
173
174
175
176
static char *baseDir = NULL;
static char *userDir = NULL;
static int allowSymLinks = 0;
177
178
179
/* mutexes ... */
static void *errorLock = NULL; /* protects error message list. */
static void *stateLock = NULL; /* protects other PhysFS static state. */
181
182
/* allocator ... */
static int externalAllocator = 0;
183
PHYSFS_Allocator allocator;
185
186
187
/* functions ... */
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
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;
204
205
ptr = allocator.Realloc(pecd->list, (pecd->size + 2) * sizeof (char *));
newstr = (char *) allocator.Malloc(strlen(str) + 1);
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
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));
227
ecd.list = (char **) allocator.Malloc(sizeof (char *));
228
229
230
231
232
233
234
235
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;
return(ecd.list);
} /* doEnumStringList */
236
static void __PHYSFS_bubble_sort(void *a, PHYSFS_uint32 lo, PHYSFS_uint32 hi,
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
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 */
258
static void __PHYSFS_quick_sort(void *a, PHYSFS_uint32 lo, PHYSFS_uint32 hi,
259
260
261
262
263
264
265
int (*cmpfn)(void *, PHYSFS_uint32, PHYSFS_uint32),
void (*swapfn)(void *, PHYSFS_uint32, PHYSFS_uint32))
{
PHYSFS_uint32 i;
PHYSFS_uint32 j;
PHYSFS_uint32 v;
266
if ((hi - lo) <= PHYSFS_QUICKSORT_THRESHOLD)
267
268
__PHYSFS_bubble_sort(a, lo, hi, cmpfn, swapfn);
else
269
270
{
i = (hi + lo) / 2;
271
272
if (cmpfn(a, lo, i) > 0) swapfn(a, lo, i);
273
274
275
276
277
278
279
280
281
282
283
284
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)
286
287
288
289
290
291
swapfn(a, i, j);
} /* while */
swapfn(a, i, hi-1);
__PHYSFS_quick_sort(a, lo, j, cmpfn, swapfn);
__PHYSFS_quick_sort(a, i+1, hi, cmpfn, swapfn);
} /* else */
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
} /* __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 */
307
308
309
static ErrMsg *findErrorForCurrentThread(void)
{
ErrMsg *i;
310
PHYSFS_uint64 tid;
312
if (errorLock != NULL)
313
314
__PHYSFS_platformGrabMutex(errorLock);
315
316
if (errorMessages != NULL)
{
317
tid = __PHYSFS_platformGetThreadID();
318
319
320
321
for (i = errorMessages; i != NULL; i = i->next)
{
if (i->tid == tid)
323
324
if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
325
return(i);
326
} /* if */
327
328
} /* for */
} /* if */
330
if (errorLock != NULL)
331
__PHYSFS_platformReleaseMutex(errorLock);
332
333
334
335
336
return(NULL); /* no error available. */
} /* findErrorForCurrentThread */
337
void __PHYSFS_setError(const char *str)
339
340
341
342
343
344
ErrMsg *err;
if (str == NULL)
return;
err = findErrorForCurrentThread();
345
346
347
if (err == NULL)
{
348
err = (ErrMsg *) allocator.Malloc(sizeof (ErrMsg));
349
350
351
if (err == NULL)
return; /* uhh...? */
352
memset((void *) err, '\0', sizeof (ErrMsg));
353
err->tid = __PHYSFS_platformGetThreadID();
355
356
357
if (errorLock != NULL)
__PHYSFS_platformGrabMutex(errorLock);
358
359
err->next = errorMessages;
errorMessages = err;
360
361
362
if (errorLock != NULL)
__PHYSFS_platformReleaseMutex(errorLock);
363
364
365
366
367
} /* if */
err->errorAvailable = 1;
strncpy(err->errorString, str, sizeof (err->errorString));
err->errorString[sizeof (err->errorString) - 1] = '\0';
368
} /* __PHYSFS_setError */
371
372
373
374
375
376
377
378
379
380
381
382
383
const char *PHYSFS_getLastError(void)
{
ErrMsg *err = findErrorForCurrentThread();
if ((err == NULL) || (!err->errorAvailable))
return(NULL);
err->errorAvailable = 0;
return(err->errorString);
} /* PHYSFS_getLastError */
/* MAKE SURE that errorLock is held before calling this! */
384
385
386
387
388
389
390
static void freeErrorMessages(void)
{
ErrMsg *i;
ErrMsg *next;
for (i = errorMessages; i != NULL; i = next)
{
391
next = i->next;
392
allocator.Free(i);
393
} /* for */
394
395
errorMessages = NULL;
396
397
398
} /* freeErrorMessages */
399
400
401
402
403
404
405
406
407
408
409
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 */
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
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 '.' */
return(retval);
} /* find_filename_extension */
429
430
static DirHandle *tryOpenDir(const PHYSFS_Archiver *funcs,
const char *d, int forWriting)
431
432
{
DirHandle *retval = NULL;
433
if (funcs->isArchive(d, forWriting))
435
void *opaque = funcs->openArchive(d, forWriting);
436
437
if (opaque != NULL)
{
438
retval = (DirHandle *) allocator.Malloc(sizeof (DirHandle));
439
if (retval == NULL)
440
funcs->dirClose(opaque);
443
memset(retval, '\0', sizeof (DirHandle));
444
retval->mountPoint = NULL;
445
retval->funcs = funcs;
446
447
448
449
450
451
452
453
454
retval->opaque = opaque;
} /* else */
} /* if */
} /* if */
return(retval);
} /* tryOpenDir */
455
456
static DirHandle *openDirectory(const char *d, int forWriting)
{
457
DirHandle *retval = NULL;
458
const PHYSFS_Archiver **i;
459
const char *ext;
461
462
BAIL_IF_MACRO(!__PHYSFS_platformExists(d), ERR_NO_SUCH_FILE, NULL);
463
464
ext = find_filename_extension(d);
if (ext != NULL)
466
/* Look for archivers with matching file extensions first... */
467
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
468
469
{
if (__PHYSFS_platformStricmp(ext, (*i)->info->extension) == 0)
470
retval = tryOpenDir(*i, d, forWriting);
471
472
473
} /* for */
/* failing an exact file extension match, try all the others... */
474
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
475
476
{
if (__PHYSFS_platformStricmp(ext, (*i)->info->extension) != 0)
477
retval = tryOpenDir(*i, d, forWriting);
478
479
480
481
482
} /* for */
} /* if */
else /* no extension? Try them all. */
{
483
for (i = archivers; (*i != NULL) && (retval == NULL); i++)
484
retval = tryOpenDir(*i, d, forWriting);
487
488
BAIL_IF_MACRO(retval == NULL, ERR_UNSUPPORTED_ARCHIVE, NULL);
return(retval);
489
490
491
} /* openDirectory */
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
/*
* 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');
return(1);
} /* sanitizePlatformIndependentPath */
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
/*
* 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)
return(0);
else if (*fname == '\0')
return(1);
len = strlen(fname);
mntpntlen = strlen(h->mountPoint);
if (len > mntpntlen) /* can't be a subset of mountpoint. */
return(0);
/* if true, must be not a match or a complete match, but not a subset. */
if ((len + 1) == mntpntlen)
return(0);
rc = strncmp(fname, h->mountPoint, len); /* !!! FIXME: case insensitive? */
if (rc != 0)
return(0); /* not a match. */
/* make sure /a/b matches /a/b/ and not /a/bc ... */
return(h->mountPoint[len] == '/');
} /* partOfMountPoint */
576
577
578
static DirHandle *createDirHandle(const char *newDir,
const char *mountPoint,
int forWriting)
579
580
{
DirHandle *dirHandle = NULL;
582
GOTO_IF_MACRO(!newDir, ERR_INVALID_ARGUMENT, badDirHandle);
583
584
585
586
587
588
589
590
if (mountPoint != NULL)
{
char *mntpnt = (char *) alloca(strlen(mountPoint) + 1);
GOTO_IF_MACRO(!mntpnt, ERR_OUT_OF_MEMORY, badDirHandle);
if (!sanitizePlatformIndependentPath(mountPoint, mntpnt))
goto badDirHandle;
mountPoint = mntpnt; /* sanitized version. */
} /* if */
591
592
dirHandle = openDirectory(newDir, forWriting);
593
GOTO_IF_MACRO(!dirHandle, NULL, badDirHandle);
595
dirHandle->dirName = (char *) allocator.Malloc(strlen(newDir) + 1);
596
597
598
599
600
GOTO_IF_MACRO(!dirHandle->dirName, ERR_OUT_OF_MEMORY, badDirHandle);
strcpy(dirHandle->dirName, newDir);
if ((mountPoint != NULL) && (*mountPoint != '\0'))
{
601
dirHandle->mountPoint = (char *)allocator.Malloc(strlen(mountPoint)+2);
602
603
604
605
606
607
608
609
610
GOTO_IF_MACRO(!dirHandle->mountPoint, ERR_OUT_OF_MEMORY, badDirHandle);
strcpy(dirHandle->mountPoint, mountPoint);
strcat(dirHandle->mountPoint, "/");
} /* if */
return(dirHandle);
badDirHandle:
if (dirHandle != NULL)
612
dirHandle->funcs->dirClose(dirHandle->opaque);
613
614
615
allocator.Free(dirHandle->dirName);
allocator.Free(dirHandle->mountPoint);
allocator.Free(dirHandle);
616
} /* if */
618
return(NULL);
619
} /* createDirHandle */
622
/* MAKE SURE you've got the stateLock held before calling this! */
623
static int freeDirHandle(DirHandle *dh, FileHandle *openList)
625
FileHandle *i;
627
if (dh == NULL)
628
629
630
return(1);
for (i = openList; i != NULL; i = i->next)
631
BAIL_IF_MACRO(i->dirHandle == dh, ERR_FILES_STILL_OPEN, 0);
633
dh->funcs->dirClose(dh->opaque);
634
635
636
allocator.Free(dh->dirName);
allocator.Free(dh->mountPoint);
allocator.Free(dh);
637
return(1);
638
} /* freeDirHandle */
639
640
641
static char *calculateUserDir(void)
642
643
644
645
646
647
{
char *retval = NULL;
const char *str = NULL;
str = __PHYSFS_platformGetUserDir();
if (str != NULL)
648
retval = (char *) str;
649
650
651
652
653
654
else
{
const char *dirsep = PHYSFS_getDirSeparator();
const char *uname = __PHYSFS_platformGetUserName();
str = (uname != NULL) ? uname : "default";
655
656
retval = (char *) allocator.Malloc(strlen(baseDir) + strlen(str) +
strlen(dirsep) + 6);
657
658
659
660
if (retval == NULL)
__PHYSFS_setError(ERR_OUT_OF_MEMORY);
else
661
sprintf(retval, "%susers%s%s", baseDir, dirsep, str);
662
663
if (uname != NULL)
664
allocator.Free((void *) uname);
665
666
667
668
669
670
} /* else */
return(retval);
} /* calculateUserDir */
671
672
673
674
675
676
677
678
static int appendDirSep(char **dir)
{
const char *dirsep = PHYSFS_getDirSeparator();
char *ptr;
if (strcmp((*dir + strlen(*dir)) - strlen(dirsep), dirsep) == 0)
return(1);
679
ptr = (char *) allocator.Realloc(*dir, strlen(*dir) + strlen(dirsep) + 1);
680
681
if (!ptr)
{
682
allocator.Free(*dir);
683
684
685
686
687
688
689
690
691
return(0);
} /* if */
strcat(ptr, dirsep);
*dir = ptr;
return(1);
} /* appendDirSep */
692
693
static char *calculateBaseDir(const char *argv0)
{
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
const char *dirsep = PHYSFS_getDirSeparator();
char *retval;
char *ptr;
/*
* See if the platform driver wants to handle this for us...
*/
retval = __PHYSFS_platformCalcBaseDir(argv0);
if (retval != NULL)
return(retval);
/*
* Determine if there's a path on argv0. If there is, that's the base dir.
*/
ptr = strstr(argv0, dirsep);
if (ptr != NULL)
{
char *p = ptr;
size_t size;
while (p != NULL)
{
ptr = p;
p = strstr(p + 1, dirsep);
} /* while */
719
size = (size_t) (ptr - argv0);
720
retval = (char *) allocator.Malloc(size + 1);
721
722
723
724
725
726
727
728
729
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
memcpy(retval, argv0, size);
retval[size] = '\0';
return(retval);
} /* if */
/*
* Last ditch effort: it's the current working directory. (*shrug*)
*/
730
retval = __PHYSFS_platformCurrentDir();
731
732
if (retval != NULL)
return(retval);
733
734
735
736
737
738
/*
* Ok, current directory doesn't exist, use the root directory.
* Not a good alternative, but it only happens if the current
* directory was deleted from under the program.
*/
739
retval = (char *) allocator.Malloc(strlen(dirsep) + 1);
740
741
strcpy(retval, dirsep);
return(retval);
742
743
744
} /* calculateBaseDir */
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
static int initializeMutexes(void)
{
errorLock = __PHYSFS_platformCreateMutex();
if (errorLock == NULL)
goto initializeMutexes_failed;
stateLock = __PHYSFS_platformCreateMutex();
if (stateLock == NULL)
goto initializeMutexes_failed;
return(1); /* success. */
initializeMutexes_failed:
if (errorLock != NULL)
__PHYSFS_platformDestroyMutex(errorLock);
if (stateLock != NULL)
__PHYSFS_platformDestroyMutex(stateLock);
errorLock = stateLock = NULL;
return(0); /* failed. */
} /* initializeMutexes */
769
770
static void setDefaultAllocator(void);
771
772
int PHYSFS_init(const char *argv0)
{
773
774
char *ptr;
775
BAIL_IF_MACRO(initialized, ERR_IS_INITIALIZED, 0);
776
777
778
779
if (!externalAllocator)
setDefaultAllocator();
780
781
if (allocator.Init != NULL)
BAIL_IF_MACRO(!allocator.Init(), NULL, 0);
783
BAIL_IF_MACRO(!__PHYSFS_platformInit(), NULL, 0);
785
786
BAIL_IF_MACRO(!initializeMutexes(), NULL, 0);
787
baseDir = calculateBaseDir(argv0);
788
BAIL_IF_MACRO(baseDir == NULL, NULL, 0);
789
790
ptr = __PHYSFS_platformRealPath(baseDir);
791
allocator.Free(baseDir);
792
793
794
BAIL_IF_MACRO(ptr == NULL, NULL, 0);
baseDir = ptr;
795
BAIL_IF_MACRO(!appendDirSep(&baseDir), NULL, 0);
796
797
userDir = calculateUserDir();
798
799
800
if (userDir != NULL)
{
ptr = __PHYSFS_platformRealPath(userDir);
801
allocator.Free(userDir);
802
803
804
userDir = ptr;
} /* if */
805
if ((userDir == NULL) || (!appendDirSep(&userDir)))
807
allocator.Free(baseDir);
808
809
810
811
baseDir = NULL;
return(0);
} /* if */
812
initialized = 1;
813
814
815
/* This makes sure that the error subsystem is initialized. */
__PHYSFS_setError(PHYSFS_getLastError());
817
818
819
820
return(1);
} /* PHYSFS_init */
821
/* MAKE SURE you hold stateLock before calling this! */
822
static int closeFileHandleList(FileHandle **list)
824
825
FileHandle *i;
FileHandle *next = NULL;
826
827
828
829
for (i = *list; i != NULL; i = next)
{
next = i->next;
830
if (!i->funcs->fileClose(i->opaque))
831
832
833
834
835
{
*list = i;
return(0);
} /* if */
836
allocator.Free(i);
837
838
839
} /* for */
*list = NULL;
840
841
return(1);
} /* closeFileHandleList */
844
/* MAKE SURE you hold the stateLock before calling this! */
845
846
static void freeSearchPath(void)
{
847
848
DirHandle *i;
DirHandle *next = NULL;
850
851
closeFileHandleList(&openReadList);
852
853
854
855
if (searchPath != NULL)
{
for (i = searchPath; i != NULL; i = next)
{
856
next = i->next;
857
freeDirHandle(i, openReadList);
858
859
860
861
862
863
} /* for */
searchPath = NULL;
} /* if */
} /* freeSearchPath */
864
int PHYSFS_deinit(void)
865
866
{
BAIL_IF_MACRO(!initialized, ERR_NOT_INITIALIZED, 0);
867
BAIL_IF_MACRO(!__PHYSFS_platformDeinit(), NULL, 0);
869
closeFileHandleList(&openWriteList);
870
871
BAIL_IF_MACRO(!PHYSFS_setWriteDir(NULL), ERR_FILES_STILL_OPEN, 0);
872
873
874
freeSearchPath();
freeErrorMessages();
875
if (baseDir != NULL)
877
allocator.Free(baseDir);
878
879
880
881
882
baseDir = NULL;
} /* if */
if (userDir != NULL)
{
883
allocator.Free(userDir);
884
885
userDir = NULL;
} /* if */
886
887
allowSymLinks = 0;
888
initialized = 0;
889
890
891
892
__PHYSFS_platformDestroyMutex(errorLock);
__PHYSFS_platformDestroyMutex(stateLock);
893
894
if (allocator.Deinit != NULL)
allocator.Deinit();
896
errorLock = stateLock = NULL;
897
898
899
900
901
902
903
904
905
906
907
908
909
910
return(1);
} /* PHYSFS_deinit */
const PHYSFS_ArchiveInfo **PHYSFS_supportedArchiveTypes(void)
{
return(supported_types);
} /* PHYSFS_supportedArchiveTypes */
void PHYSFS_freeList(void *list)
{
void **i;
for (i = (void **) list; *i != NULL; i++)
911
allocator.Free(*i);
913
allocator.Free(list);
914
915
916
917
918
} /* PHYSFS_freeList */
const char *PHYSFS_getDirSeparator(void)
{
919
return(__PHYSFS_platformDirSeparator);
920
921
922
923
924
} /* PHYSFS_getDirSeparator */
char **PHYSFS_getCdRomDirs(void)
{
925
return(doEnumStringList(__PHYSFS_platformDetectAvailableCDs));
926
927
928
} /* PHYSFS_getCdRomDirs */
929
930
931
932
933
934
void PHYSFS_getCdRomDirsCallback(PHYSFS_StringCallback callback, void *data)
{
__PHYSFS_platformDetectAvailableCDs(callback, data);
} /* PHYSFS_getCdRomDirsCallback */
935
936
937
938
939
940
941
942
const char *PHYSFS_getBaseDir(void)
{
return(baseDir); /* this is calculated in PHYSFS_init()... */
} /* PHYSFS_getBaseDir */
const char *PHYSFS_getUserDir(void)
{
943
return(userDir); /* this is calculated in PHYSFS_init()... */
944
945
946
947
948
} /* PHYSFS_getUserDir */
const char *PHYSFS_getWriteDir(void)
{
949
950
951
952
953
954
const char *retval = NULL;
__PHYSFS_platformGrabMutex(stateLock);
if (writeDir != NULL)
retval = writeDir->dirName;
__PHYSFS_platformReleaseMutex(stateLock);
956
return(retval);
957
958
959
960
961
} /* PHYSFS_getWriteDir */
int PHYSFS_setWriteDir(const char *newDir)
{
962
963
964
965
int retval = 1;
__PHYSFS_platformGrabMutex(stateLock);
966
967
if (writeDir != NULL)
{
968
BAIL_IF_MACRO_MUTEX(!freeDirHandle(writeDir, openWriteList), NULL,
969
stateLock, 0);
970
971
972
writeDir = NULL;
} /* if */
973
974
if (newDir != NULL)
{
975
writeDir = createDirHandle(newDir, NULL, 1);
976
retval = (writeDir != NULL);
977
} /* if */
979
980
981
__PHYSFS_platformReleaseMutex(stateLock);
return(retval);
982
983
984
} /* PHYSFS_setWriteDir */
985
int PHYSFS_mount(const char *newDir, const char *mountPoint, int appendToPath)
987
988
989
DirHandle *dh;
DirHandle *prev = NULL;
DirHandle *i;
991
BAIL_IF_MACRO(newDir == NULL, ERR_INVALID_ARGUMENT, 0);
992
993
994
if (mountPoint == NULL)
mountPoint = "/";
996
__PHYSFS_platformGrabMutex(stateLock);
998
999
1000
for (i = searchPath; i != NULL; i = i->next)
{
/* already in search path? */