/
physfs.h
2178 lines (1976 loc) · 83 KB
1
2
/** \file physfs.h */
3
/**
4
5
6
7
8
* \mainpage PhysicsFS
*
* The latest version of PhysicsFS can be found at:
* http://icculus.org/physfs/
*
9
10
11
12
13
14
15
16
17
18
19
* PhysicsFS; a portable, flexible file i/o abstraction.
*
* This API gives you access to a system file system in ways superior to the
* stdio or system i/o calls. The brief benefits:
*
* - It's portable.
* - It's safe. No file access is permitted outside the specified dirs.
* - It's flexible. Archives (.ZIP files) can be used transparently as
* directory structures.
*
* This system is largely inspired by Quake 3's PK3 files and the related
20
* fs_* cvars. If you've ever tinkered with these, then this API will be
21
22
* familiar to you.
*
23
24
25
26
27
28
* With PhysicsFS, you have a single writing directory and multiple
* directories (the "search path") for reading. You can think of this as a
* filesystem within a filesystem. If (on Windows) you were to set the
* writing directory to "C:\MyGame\MyWritingDirectory", then no PHYSFS calls
* could touch anything above this directory, including the "C:\MyGame" and
* "C:\" directories. This prevents an application's internal scripting
29
* language from piddling over c:\\config.sys, for example. If you'd rather
30
31
* give PHYSFS full access to the system's REAL file system, set the writing
* dir to "C:\", but that's generally A Bad Thing for several reasons.
32
33
*
* Drive letters are hidden in PhysicsFS once you set up your initial paths.
34
* The search path creates a single, hierarchical directory structure.
35
36
37
38
39
40
41
* Not only does this lend itself well to general abstraction with archives,
* it also gives better support to operating systems like MacOS and Unix.
* Generally speaking, you shouldn't ever hardcode a drive letter; not only
* does this hurt portability to non-Microsoft OSes, but it limits your win32
* users to a single drive, too. Use the PhysicsFS abstraction functions and
* allow user-defined configuration options, too. When opening a file, you
* specify it like it was on a Unix filesystem: if you want to write to
42
* "C:\MyGame\MyConfigFiles\game.cfg", then you might set the write dir to
43
* "C:\MyGame" and then open "MyConfigFiles/game.cfg". This gives an
44
* abstraction across all platforms. Specifying a file in this way is termed
45
46
47
48
49
50
51
52
* "platform-independent notation" in this documentation. Specifying a
* a filename in a form such as "C:\mydir\myfile" or
* "MacOS hard drive:My Directory:My File" is termed "platform-dependent
* notation". The only time you use platform-dependent notation is when
* setting up your write directory and search path; after that, all file
* access into those directories are done with platform-independent notation.
*
* All files opened for writing are opened in relation to the write directory,
53
* which is the root of the writable filesystem. When opening a file for
54
* reading, PhysicsFS goes through the search path. This is NOT the
55
56
57
58
59
60
* same thing as the PATH environment variable. An application using
* PhysicsFS specifies directories to be searched which may be actual
* directories, or archive files that contain files and subdirectories of
* their own. See the end of these docs for currently supported archive
* formats.
*
61
* Once the search path is defined, you may open files for reading. If you've
62
63
* got the following search path defined (to use a win32 example again):
*
64
65
66
67
* - C:\\mygame
* - C:\\mygame\\myuserfiles
* - D:\\mygamescdromdatafiles
* - C:\\mygame\\installeddatafiles.zip
68
*
69
* Then a call to PHYSFS_openRead("textfiles/myfile.txt") (note the directory
70
71
* separator, lack of drive letter, and lack of dir separator at the start of
* the string; this is platform-independent notation) will check for
72
73
74
75
76
77
78
* C:\\mygame\\textfiles\\myfile.txt, then
* C:\\mygame\\myuserfiles\\textfiles\\myfile.txt, then
* D:\\mygamescdromdatafiles\\textfiles\\myfile.txt, then, finally, for
* textfiles\\myfile.txt inside of C:\\mygame\\installeddatafiles.zip.
* Remember that most archive types and platform filesystems store their
* filenames in a case-sensitive manner, so you should be careful to specify
* it correctly.
79
*
80
* Files opened through PhysicsFS may NOT contain "." or ".." or ":" as dir
81
82
83
84
85
86
87
* elements. Not only are these meaningless on MacOS Classic and/or Unix,
* they are a security hole. Also, symbolic links (which can be found in
* some archive types and directly in the filesystem on Unix platforms) are
* NOT followed until you call PHYSFS_permitSymbolicLinks(). That's left to
* your own discretion, as following a symlink can allow for access outside
* the write dir and search paths. For portability, there is no mechanism for
* creating new symlinks in PhysicsFS.
88
89
90
91
92
93
*
* The write dir is not included in the search path unless you specifically
* add it. While you CAN change the write dir as many times as you like,
* you should probably set it once and stick to it. Remember that your
* program will not have permission to write in every directory on Unix and
* NT systems.
94
95
96
*
* All files are opened in binary mode; there is no endline conversion for
* textfiles. Other than that, PhysicsFS has some convenience functions for
97
* platform-independence. There is a function to tell you the current
98
* platform's dir separator ("\\" on windows, "/" on Unix, ":" on MacOS),
99
100
101
* which is needed only to set up your search/write paths. There is a
* function to tell you what CD-ROM drives contain accessible discs, and a
* function to recommend a good search path, etc.
102
*
103
104
* A recommended order for the search path is the write dir, then the base dir,
* then the cdrom dir, then any archives discovered. Quake 3 does something
105
106
* like this, but moves the archives to the start of the search path. Build
* Engine games, like Duke Nukem 3D and Blood, place the archives last, and
107
108
* use the base dir for both searching and writing. There is a helper
* function (PHYSFS_setSaneConfig()) that puts together a basic configuration
109
* for you, based on a few parameters. Also see the comments on
110
111
112
* PHYSFS_getBaseDir(), and PHYSFS_getUserDir() for info on what those
* are and how they can help you determine an optimal search path.
*
113
114
115
116
117
118
119
120
121
122
123
124
* PhysicsFS 2.0 adds the concept of "mounting" archives to arbitrary points
* in the search path. If a zipfile contains "maps/level.map" and you mount
* that archive at "mods/mymod", then you would have to open
* "mods/mymod/maps/level.map" to access the file, even though "mods/mymod"
* isn't actually specified in the .zip file. Unlike the Unix mentality of
* mounting a filesystem, "mods/mymod" doesn't actually have to exist when
* mounting the zipfile. It's a "virtual" directory. The mounting mechanism
* allows the developer to seperate archives in the tree and avoid trampling
* over files when added new archives, such as including mod support in a
* game...keeping external content on a tight leash in this manner can be of
* utmost importance to some applications.
*
125
126
127
128
129
130
* PhysicsFS is mostly thread safe. The error messages returned by
* PHYSFS_getLastError are unique by thread, and library-state-setting
* functions are mutex'd. For efficiency, individual file accesses are
* not locked, so you can not safely read/write/seek/close/etc the same
* file from two threads at the same time. Other race conditions are bugs
* that should be reported/patched.
131
132
133
*
* While you CAN use stdio/syscall file access in a program that has PHYSFS_*
* calls, doing so is not recommended, and you can not use system
134
* filehandles with PhysicsFS and vice versa.
135
136
*
* Note that archives need not be named as such: if you have a ZIP file and
137
* rename it with a .PKG extension, the file will still be recognized as a
138
* ZIP archive by PhysicsFS; the file's contents are used to determine its
139
* type where possible.
140
141
142
*
* Currently supported archive types:
* - .ZIP (pkZip/WinZip/Info-ZIP compatible)
143
* - .GRP (Build Engine groupfile archives)
144
* - .PAK (Quake I/II archive format)
145
146
* - .HOG (Descent I/II HOG file archives)
* - .MVL (Descent II movielib archives)
147
* - .WAD (DOOM engine archives)
149
150
151
*
* String policy for PhysicsFS 2.0 and later:
*
152
153
154
155
156
* PhysicsFS 1.0 could only deal with null-terminated ASCII strings. All high
* ASCII chars resulted in undefined behaviour, and there was no Unicode
* support at all. PhysicsFS 2.0 supports Unicode without breaking binary
* compatibility with the 1.0 API by using UTF-8 encoding of all strings
* passed in and out of the library.
157
158
159
160
161
162
163
164
165
166
*
* All strings passed through PhysicsFS are in null-terminated UTF-8 format.
* This means that if all you care about is English (ASCII characters <= 127)
* then you just use regular C strings. If you care about Unicode (and you
* should!) then you need to figure out what your platform wants, needs, and
* offers. If you are on Windows and build with Unicode support, your TCHAR
* strings are two bytes per character (this is called "UCS-2 encoding"). You
* should convert them to UTF-8 before handing them to PhysicsFS with
* PHYSFS_utf8fromucs2(). If you're using Unix or Mac OS X, your wchar_t
* strings are four bytes per character ("UCS-4 encoding"). Use
167
168
169
170
171
172
173
174
* PHYSFS_utf8fromucs4(). Mac OS X can give you UTF-8 directly from a
* CFString, and many Unixes generally give you C strings in UTF-8 format
* everywhere. If you have a single-byte high ASCII charset, like so-many
* European "codepages" you may be out of luck. We'll convert from "Latin1"
* to UTF-8 only, and never back to Latin1. If you're above ASCII 127, all
* bets are off: move to Unicode or use your platform's facilities. Passing a
* C string with high-ASCII data that isn't UTF-8 encoded will NOT do what
* you expect!
175
176
177
178
179
180
181
182
183
*
* Naturally, there's also PHYSFS_utf8toucs2() and PHYSFS_utf8toucs4() to get
* data back into a format you like. Behind the scenes, PhysicsFS will use
* Unicode where possible: the UTF-8 strings on Windows will be converted
* and used with the multibyte Windows APIs, for example.
*
* PhysicsFS offers basic encoding conversion support, but not a whole string
* library. Get your stuff into whatever format you can work with.
*
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
* Some platforms and archivers don't offer full Unicode support behind the
* scenes. For example, OS/2 only offers "codepages" and the filesystem
* itself doesn't support multibyte encodings. We make an earnest effort to
* convert to/from the current locale here, but all bets are off if
* you want to hand an arbitrary Japanese character through to these systems.
* Modern OSes (Mac OS X, Linux, Windows, PocketPC, etc) should all be fine.
* Many game-specific archivers are seriously unprepared for Unicode (the
* Descent HOG/MVL and Build Engine GRP archivers, for example, only offer a
* DOS 8.3 filename, for example). Nothing can be done for these, but they
* tend to be legacy formats for existing content that was all ASCII (and
* thus, valid UTF-8) anyhow. Other formats, like .ZIP, don't explicitly
* offer Unicode support, but unofficially expect filenames to be UTF-8
* encoded, and thus Just Work. Most everything does the right thing without
* bothering you, but it's good to be aware of these nuances in case they
* don't.
*
200
201
202
*
* Other stuff:
*
203
* Please see the file LICENSE.txt in the source's root directory for licensing
204
* and redistribution rights.
205
*
206
* Please see the file CREDITS.txt in the source's root directory for a more or
207
* less complete list of who's responsible for this.
208
*
209
* \author Ryan C. Gordon.
210
211
212
213
214
215
216
217
218
*/
#ifndef _INCLUDE_PHYSFS_H_
#define _INCLUDE_PHYSFS_H_
#ifdef __cplusplus
extern "C" {
#endif
219
#ifndef DOXYGEN_SHOULD_IGNORE_THIS
220
221
#if (defined _MSC_VER)
#define __EXPORT__ __declspec(dllexport)
222
#elif (__GNUC__ >= 3)
223
#define __EXPORT__ __attribute__((visibility("default")))
224
225
226
#else
#define __EXPORT__
#endif
227
#endif /* DOXYGEN_SHOULD_IGNORE_THIS */
229
230
231
232
/**
* \typedef PHYSFS_uint8
* \brief An unsigned, 8-bit integer type.
*/
233
typedef unsigned char PHYSFS_uint8;
234
235
236
237
238
/**
* \typedef PHYSFS_sint8
* \brief A signed, 8-bit integer type.
*/
239
typedef signed char PHYSFS_sint8;
240
241
242
243
244
/**
* \typedef PHYSFS_uint16
* \brief An unsigned, 16-bit integer type.
*/
245
typedef unsigned short PHYSFS_uint16;
246
247
248
249
250
/**
* \typedef PHYSFS_sint16
* \brief A signed, 16-bit integer type.
*/
251
typedef signed short PHYSFS_sint16;
252
253
254
255
256
/**
* \typedef PHYSFS_uint32
* \brief An unsigned, 32-bit integer type.
*/
257
typedef unsigned int PHYSFS_uint32;
258
259
260
261
262
/**
* \typedef PHYSFS_sint32
* \brief A signed, 32-bit integer type.
*/
263
264
typedef signed int PHYSFS_sint32;
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
/**
* \typedef PHYSFS_uint64
* \brief An unsigned, 64-bit integer type.
* \warning on platforms without any sort of 64-bit datatype, this is
* equivalent to PHYSFS_uint32!
*/
/**
* \typedef PHYSFS_sint64
* \brief A signed, 64-bit integer type.
* \warning on platforms without any sort of 64-bit datatype, this is
* equivalent to PHYSFS_sint32!
*/
280
#if (defined PHYSFS_NO_64BIT_SUPPORT) /* oh well. */
281
282
typedef PHYSFS_uint32 PHYSFS_uint64;
typedef PHYSFS_sint32 PHYSFS_sint64;
283
284
285
#elif (defined _MSC_VER)
typedef signed __int64 PHYSFS_sint64;
typedef unsigned __int64 PHYSFS_uint64;
286
287
288
289
290
#else
typedef unsigned long long PHYSFS_uint64;
typedef signed long long PHYSFS_sint64;
#endif
291
292
#ifndef DOXYGEN_SHOULD_IGNORE_THIS
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
/* Make sure the types really have the right sizes */
#define PHYSFS_COMPILE_TIME_ASSERT(name, x) \
typedef int PHYSFS_dummy_ ## name[(x) * 2 - 1]
PHYSFS_COMPILE_TIME_ASSERT(uint8, sizeof(PHYSFS_uint8) == 1);
PHYSFS_COMPILE_TIME_ASSERT(sint8, sizeof(PHYSFS_sint8) == 1);
PHYSFS_COMPILE_TIME_ASSERT(uint16, sizeof(PHYSFS_uint16) == 2);
PHYSFS_COMPILE_TIME_ASSERT(sint16, sizeof(PHYSFS_sint16) == 2);
PHYSFS_COMPILE_TIME_ASSERT(uint32, sizeof(PHYSFS_uint32) == 4);
PHYSFS_COMPILE_TIME_ASSERT(sint32, sizeof(PHYSFS_sint32) == 4);
#ifndef PHYSFS_NO_64BIT_SUPPORT
PHYSFS_COMPILE_TIME_ASSERT(uint64, sizeof(PHYSFS_uint64) == 8);
PHYSFS_COMPILE_TIME_ASSERT(sint64, sizeof(PHYSFS_sint64) == 8);
#endif
#undef PHYSFS_COMPILE_TIME_ASSERT
311
#endif /* DOXYGEN_SHOULD_IGNORE_THIS */
315
* \struct PHYSFS_File
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
* \brief A PhysicsFS file handle.
*
* You get a pointer to one of these when you open a file for reading,
* writing, or appending via PhysicsFS.
*
* As you can see from the lack of meaningful fields, you should treat this
* as opaque data. Don't try to manipulate the file handle, just pass the
* pointer you got, unmolested, to various PhysicsFS APIs.
*
* \sa PHYSFS_openRead
* \sa PHYSFS_openWrite
* \sa PHYSFS_openAppend
* \sa PHYSFS_close
* \sa PHYSFS_read
* \sa PHYSFS_write
* \sa PHYSFS_seek
* \sa PHYSFS_tell
* \sa PHYSFS_eof
334
335
* \sa PHYSFS_setBuffer
* \sa PHYSFS_flush
336
337
*/
typedef struct
339
void *opaque; /**< That's all you get. Don't touch. */
340
} PHYSFS_File;
342
typedef PHYSFS_File PHYSFS_file; /* for backwards compatibility with 1.0 */
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
/**
* \struct PHYSFS_ArchiveInfo
* \brief Information on various PhysicsFS-supported archives.
*
* This structure gives you details on what sort of archives are supported
* by this implementation of PhysicsFS. Archives tend to be things like
* ZIP files and such.
*
* \warning Not all binaries are created equal! PhysicsFS can be built with
* or without support for various archives. You can check with
* PHYSFS_supportedArchiveTypes() to see if your archive type is
* supported.
*
* \sa PHYSFS_supportedArchiveTypes
*/
typedef struct
{
const char *extension; /**< Archive file extension: "ZIP", for example. */
const char *description; /**< Human-readable archive description. */
const char *author; /**< Person who did support for this archive. */
const char *url; /**< URL related to this archive */
} PHYSFS_ArchiveInfo;
369
370
371
372
373
374
375
376
377
378
379
/**
* \struct PHYSFS_Version
* \brief Information the version of PhysicsFS in use.
*
* Represents the library's version as three levels: major revision
* (increments with massive changes, additions, and enhancements),
* minor revision (increments with backwards-compatible changes to the
* major revision), and patchlevel (increments with fixes to the minor
* revision).
*
* \sa PHYSFS_VERSION
380
* \sa PHYSFS_getLinkedVersion
381
382
*/
typedef struct
384
385
386
PHYSFS_uint8 major; /**< major revision */
PHYSFS_uint8 minor; /**< minor revision */
PHYSFS_uint8 patch; /**< patchlevel */
387
388
} PHYSFS_Version;
389
#ifndef DOXYGEN_SHOULD_IGNORE_THIS
390
#define PHYSFS_VER_MAJOR 1
391
#define PHYSFS_VER_MINOR 1
392
#define PHYSFS_VER_PATCH 0
393
394
#endif /* DOXYGEN_SHOULD_IGNORE_THIS */
395
396
397
/* PhysicsFS state stuff ... */
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
/**
* \def PHYSFS_VERSION(x)
* \brief Macro to determine PhysicsFS version program was compiled against.
*
* This macro fills in a PHYSFS_Version structure with the version of the
* library you compiled against. This is determined by what header the
* compiler uses. Note that if you dynamically linked the library, you might
* have a slightly newer or older version at runtime. That version can be
* determined with PHYSFS_getLinkedVersion(), which, unlike PHYSFS_VERSION,
* is not a macro.
*
* \param x A pointer to a PHYSFS_Version struct to initialize.
*
* \sa PHYSFS_Version
* \sa PHYSFS_getLinkedVersion
*/
#define PHYSFS_VERSION(x) \
{ \
(x)->major = PHYSFS_VER_MAJOR; \
(x)->minor = PHYSFS_VER_MINOR; \
(x)->patch = PHYSFS_VER_PATCH; \
}
420
421
422
/**
423
424
425
426
427
* \fn void PHYSFS_getLinkedVersion(PHYSFS_Version *ver)
* \brief Get the version of PhysicsFS that is linked against your program.
*
* If you are using a shared library (DLL) version of PhysFS, then it is
* possible that it will be different than the version you compiled against.
428
429
430
431
*
* This is a real function; the macro PHYSFS_VERSION tells you what version
* of PhysFS you compiled against:
*
433
434
435
436
437
438
439
440
441
* PHYSFS_Version compiled;
* PHYSFS_Version linked;
*
* PHYSFS_VERSION(&compiled);
* PHYSFS_getLinkedVersion(&linked);
* printf("We compiled against PhysFS version %d.%d.%d ...\n",
* compiled.major, compiled.minor, compiled.patch);
* printf("But we linked against PhysFS version %d.%d.%d.\n",
* linked.major, linked.minor, linked.patch);
442
* \endcode
443
444
*
* This function may be called safely at any time, even before PHYSFS_init().
445
446
*
* \sa PHYSFS_VERSION
448
__EXPORT__ void PHYSFS_getLinkedVersion(PHYSFS_Version *ver);
452
453
454
455
* \fn int PHYSFS_init(const char *argv0)
* \brief Initialize the PhysicsFS library.
*
* This must be called before any other PhysicsFS function.
457
458
459
* This should be called prior to any attempts to change your process's
* current working directory.
*
460
461
462
463
464
465
* \param argv0 the argv[0] string passed to your program's mainline.
* This may be NULL on most platforms (such as ones without a
* standard main() function), but you should always try to pass
* something in here. Unix-like systems such as Linux _need_ to
* pass argv[0] from main() in here.
* \return nonzero on success, zero on error. Specifics of the error can be
466
* gleaned from PHYSFS_getLastError().
467
468
*
* \sa PHYSFS_deinit
470
__EXPORT__ int PHYSFS_init(const char *argv0);
474
475
476
477
478
* \fn int PHYSFS_deinit(void)
* \brief Deinitialize the PhysicsFS library.
*
* This closes any files opened via PhysicsFS, blanks the search/write paths,
* frees memory, and invalidates all of your file handles.
480
481
482
483
484
485
* Note that this call can FAIL if there's a file open for writing that
* refuses to close (for example, the underlying operating system was
* buffering writes to network filesystem, and the fileserver has crashed,
* or a hard drive has failed, etc). It is usually best to close all write
* handles yourself before calling this function, so that you can gracefully
* handle a specific failure.
487
488
489
* Once successfully deinitialized, PHYSFS_init() can be called again to
* restart the subsystem. All defaults API states are restored at this
* point.
491
* \return nonzero on success, zero on error. Specifics of the error can be
492
493
* gleaned from PHYSFS_getLastError(). If failure, state of PhysFS is
* undefined, and probably badly screwed up.
494
495
*
* \sa PHYSFS_init
497
__EXPORT__ int PHYSFS_deinit(void);
501
502
503
* \fn const PHYSFS_ArchiveInfo **PHYSFS_supportedArchiveTypes(void)
* \brief Get a list of supported archive types.
*
504
505
506
507
508
509
* Get a list of archive types supported by this implementation of PhysicFS.
* These are the file formats usable for search path entries. This is for
* informational purposes only. Note that the extension listed is merely
* convention: if we list "ZIP", you can open a PkZip-compatible archive
* with an extension of "XYZ", if you like.
*
510
511
* The returned value is an array of pointers to PHYSFS_ArchiveInfo structures,
* with a NULL entry to signify the end of the list:
514
515
516
517
518
519
520
* PHYSFS_ArchiveInfo **i;
*
* for (i = PHYSFS_supportedArchiveTypes(); *i != NULL; i++)
* {
* printf("Supported archive: [%s], which is [%s].\n",
* i->extension, i->description);
* }
521
* \endcode
522
523
524
525
*
* The return values are pointers to static internal memory, and should
* be considered READ ONLY, and never freed.
*
526
* \return READ ONLY Null-terminated array of READ ONLY structures.
528
__EXPORT__ const PHYSFS_ArchiveInfo **PHYSFS_supportedArchiveTypes(void);
529
530
531
/**
532
533
534
* \fn void PHYSFS_freeList(void *listVar)
* \brief Deallocate resources of lists returned by PhysicsFS.
*
535
536
537
* Certain PhysicsFS functions return lists of information that are
* dynamically allocated. Use this function to free those resources.
*
538
539
540
541
542
* \param listVar List of information specified as freeable by this function.
*
* \sa PHYSFS_getCdRomDirs
* \sa PHYSFS_enumerateFiles
* \sa PHYSFS_getSearchPath
544
__EXPORT__ void PHYSFS_freeList(void *listVar);
547
/**
548
549
550
* \fn const char *PHYSFS_getLastError(void)
* \brief Get human-readable error information.
*
551
552
553
554
555
556
557
558
559
560
561
* Get the last PhysicsFS error message as a human-readable, null-terminated
* string. This will be NULL if there's been no error since the last call to
* this function. The pointer returned by this call points to an internal
* buffer. Each thread has a unique error state associated with it, but each
* time a new error message is set, it will overwrite the previous one
* associated with that thread. It is safe to call this function at anytime,
* even before PHYSFS_init().
*
* It is not wise to expect a specific string of characters here, since the
* error message may be localized into an unfamiliar language. These strings
* are meant to be passed on directly to the user.
562
*
563
* \return READ ONLY string of last error message.
564
*/
565
__EXPORT__ const char *PHYSFS_getLastError(void);
566
567
568
/**
569
570
* \fn const char *PHYSFS_getDirSeparator(void)
* \brief Get platform-dependent dir separator string.
571
*
572
573
574
575
576
577
578
579
* This returns "\\\\" on win32, "/" on Unix, and ":" on MacOS. It may be more
* than one character, depending on the platform, and your code should take
* that into account. Note that this is only useful for setting up the
* search/write paths, since access into those dirs always use '/'
* (platform-independent notation) to separate directories. This is also
* handy for getting platform-independent access when using stdio calls.
*
* \return READ ONLY null-terminated string of platform's dir separator.
580
*/
581
__EXPORT__ const char *PHYSFS_getDirSeparator(void);
582
583
585
586
587
588
589
590
* \fn void PHYSFS_permitSymbolicLinks(int allow)
* \brief Enable or disable following of symbolic links.
*
* Some physical filesystems and archives contain files that are just pointers
* to other files. On the physical filesystem, opening such a link will
* (transparently) open the file that is pointed to.
591
592
593
594
595
596
597
598
599
600
601
602
*
* By default, PhysicsFS will check if a file is really a symlink during open
* calls and fail if it is. Otherwise, the link could take you outside the
* write and search paths, and compromise security.
*
* If you want to take that risk, call this function with a non-zero parameter.
* Note that this is more for sandboxing a program's scripting language, in
* case untrusted scripts try to compromise the system. Generally speaking,
* a user could very well have a legitimate reason to set up a symlink, so
* unless you feel there's a specific danger in allowing them, you should
* permit them.
*
603
604
605
606
* Symlinks are only explicitly checked when dealing with filenames
* in platform-independent notation. That is, when setting up your
* search and write paths, etc, symlinks are never checked for.
*
607
608
* Symbolic link permission can be enabled or disabled at any time after
* you've called PHYSFS_init(), and is disabled by default.
610
* \param allow nonzero to permit symlinks, zero to deny linking.
612
__EXPORT__ void PHYSFS_permitSymbolicLinks(int allow);
615
/**
616
617
* \fn char **PHYSFS_getCdRomDirs(void)
* \brief Get an array of paths to available CD-ROM drives.
618
*
619
620
* The dirs returned are platform-dependent ("D:\" on Win32, "/cdrom" or
* whatnot on Unix). Dirs are only returned if there is a disc ready and
621
622
623
624
625
626
627
628
629
* accessible in the drive. So if you've got two drives (D: and E:), and only
* E: has a disc in it, then that's all you get. If the user inserts a disc
* in D: and you call this function again, you get both drives. If, on a
* Unix box, the user unmounts a disc and remounts it elsewhere, the next
* call to this function will reflect that change. Fun.
*
* The returned value is an array of strings, with a NULL entry to signify the
* end of the list:
*
631
* char **cds = PHYSFS_getCdRomDirs();
632
633
* char **i;
*
634
* for (i = cds; *i != NULL; i++)
635
* printf("cdrom dir [%s] is available.\n", *i);
636
*
637
* PHYSFS_freeList(cds);
638
* \endcode
640
641
* This call may block while drives spin up. Be forewarned.
*
642
643
644
* When you are done with the returned information, you may dispose of the
* resources by calling PHYSFS_freeList() with the returned pointer.
*
645
* \return Null-terminated array of null-terminated strings.
646
647
*
* \sa PHYSFS_getCdRomDirsCallback
648
*/
649
__EXPORT__ char **PHYSFS_getCdRomDirs(void);
650
651
652
/**
653
654
655
* \fn const char *PHYSFS_getBaseDir(void)
* \brief Get the path where the application resides.
*
656
657
* Helper function.
*
658
* Get the "base dir". This is the directory where the application was run
659
660
* from, which is probably the installation directory, and may or may not
* be the process's current working directory.
661
*
662
* You should probably use the base dir in your search path.
663
*
664
665
666
* \return READ ONLY string of base dir in platform-dependent notation.
*
* \sa PHYSFS_getUserDir
667
*/
668
__EXPORT__ const char *PHYSFS_getBaseDir(void);
669
670
671
/**
672
673
674
* \fn const char *PHYSFS_getUserDir(void)
* \brief Get the path where user's home directory resides.
*
675
676
* Helper function.
*
677
* Get the "user dir". This is meant to be a suggestion of where a specific
678
* user of the system can store files. On Unix, this is her home directory.
679
* On systems with no concept of multiple home directories (MacOS, win95),
680
* this will default to something like "C:\mybasedir\users\username"
681
682
* where "username" will either be the login name, or "default" if the
* platform doesn't support multiple users, either.
683
*
684
* You should probably use the user dir as the basis for your write dir, and
685
686
* also put it near the beginning of your search path.
*
687
688
689
* \return READ ONLY string of user dir in platform-dependent notation.
*
* \sa PHYSFS_getBaseDir
690
*/
691
__EXPORT__ const char *PHYSFS_getUserDir(void);
692
693
694
/**
695
696
697
* \fn const char *PHYSFS_getWriteDir(void)
* \brief Get path where PhysicsFS will allow file writing.
*
698
* Get the current write dir. The default write dir is NULL.
699
*
700
* \return READ ONLY string of write dir in platform-dependent notation,
701
* OR NULL IF NO WRITE PATH IS CURRENTLY SET.
702
703
*
* \sa PHYSFS_setWriteDir
704
*/
705
__EXPORT__ const char *PHYSFS_getWriteDir(void);
706
707
708
/**
709
710
711
* \fn int PHYSFS_setWriteDir(const char *newDir)
* \brief Tell PhysicsFS where it may write files.
*
712
* Set a new write dir. This will override the previous setting.
713
*
714
715
* This call will fail (and fail to change the write dir) if the current
* write dir still has files open in it.
716
*
717
* \param newDir The new directory to be the root of the write dir,
718
* specified in platform-dependent notation. Setting to NULL
719
* disables the write dir, so no files can be opened for
720
* writing via PhysicsFS.
721
* \return non-zero on success, zero on failure. All attempts to open a file
722
723
724
* for writing via PhysicsFS will fail until this call succeeds.
* Specifics of the error can be gleaned from PHYSFS_getLastError().
*
725
* \sa PHYSFS_getWriteDir
726
*/
727
__EXPORT__ int PHYSFS_setWriteDir(const char *newDir);
728
729
730
731
732
733
/**
* \fn int PHYSFS_addToSearchPath(const char *newDir, int appendToPath)
* \brief Add an archive or directory to the search path.
*
734
* This is a legacy call in PhysicsFS 2.0, equivalent to:
735
* PHYSFS_mount(newDir, NULL, appendToPath);
737
738
739
* You must use this and not PHYSFS_mount if binary compatibility with
* PhysicsFS 1.0 is important (which it may not be for many people).
*
740
* \sa PHYSFS_mount
741
742
* \sa PHYSFS_removeFromSearchPath
* \sa PHYSFS_getSearchPath
743
*/
744
__EXPORT__ int PHYSFS_addToSearchPath(const char *newDir, int appendToPath);
745
746
747
/**
748
749
* \fn int PHYSFS_removeFromSearchPath(const char *oldDir)
* \brief Remove a directory or archive from the search path.
750
751
752
753
754
755
756
*
* This must be a (case-sensitive) match to a dir or archive already in the
* search path, specified in platform-dependent notation.
*
* This call will fail (and fail to remove from the path) if the element still
* has files open in it.
*
757
758
* \param oldDir dir/archive to remove.
* \return nonzero on success, zero on failure.
759
* Specifics of the error can be gleaned from PHYSFS_getLastError().
760
761
762
*
* \sa PHYSFS_addToSearchPath
* \sa PHYSFS_getSearchPath
763
*/
764
__EXPORT__ int PHYSFS_removeFromSearchPath(const char *oldDir);
765
766
767
/**
768
769
770
771
* \fn char **PHYSFS_getSearchPath(void)
* \brief Get the current search path.
*
* The default search path is an empty list.
772
773
774
775
*
* The returned value is an array of strings, with a NULL entry to signify the
* end of the list:
*
777
778
779
780
* char **i;
*
* for (i = PHYSFS_getSearchPath(); *i != NULL; i++)
* printf("[%s] is in the search path.\n", *i);
781
* \endcode
782
*
783
784
* When you are done with the returned information, you may dispose of the
* resources by calling PHYSFS_freeList() with the returned pointer.
785
*
786
* \return Null-terminated array of null-terminated strings. NULL if there
787
* was a problem (read: OUT OF MEMORY).
789
* \sa PHYSFS_getSearchPathCallback
790
791
* \sa PHYSFS_addToSearchPath
* \sa PHYSFS_removeFromSearchPath
792
*/
793
__EXPORT__ char **PHYSFS_getSearchPath(void);
794
795
796
/**
797
798
799
* \fn int PHYSFS_setSaneConfig(const char *organization, const char *appName, const char *archiveExt, int includeCdRoms, int archivesFirst)
* \brief Set up sane, default paths.
*
800
801
* Helper function.
*
802
803
* The write dir will be set to "userdir/.organization/appName", which is
* created if it doesn't exist.
804
805
806
807
808
809
810
*
* The above is sufficient to make sure your program's configuration directory
* is separated from other clutter, and platform-independent. The period
* before "mygame" even hides the directory on Unix systems.
*
* The search path will be:
*
811
812
813
* - The Write Dir (created if it doesn't exist)
* - The Base Dir (PHYSFS_getBaseDir())
* - All found CD-ROM dirs (optionally)
814
815
816
817
818
819
820
821
822
*
* These directories are then searched for files ending with the extension
* (archiveExt), which, if they are valid and supported archives, will also
* be added to the search path. If you specified "PKG" for (archiveExt), and
* there's a file named data.PKG in the base dir, it'll be checked. Archives
* can either be appended or prepended to the search path in alphabetical
* order, regardless of which directories they were found in.
*
* All of this can be accomplished from the application, but this just does it
823
* all for you. Feel free to add more to the search path manually, too.
824
*
825
* \param organization Name of your company/group/etc to be used as a
826
827
* dirname, so keep it small, and no-frills.
*
828
* \param appName Program-specific name of your program, to separate it
829
830
* from other programs using PhysicsFS.
*
831
* \param archiveExt File extension used by your program to specify an
832
833
* archive. For example, Quake 3 uses "pk3", even though
* they are just zipfiles. Specify NULL to not dig out
834
835
836
* archives automatically. Do not specify the '.' char;
* If you want to look for ZIP files, specify "ZIP" and
* not ".ZIP" ... the archive search is case-insensitive.
837
*
838
* \param includeCdRoms Non-zero to include CD-ROMs in the search path, and
839
840
841
842
843
844
845
* (if (archiveExt) != NULL) search them for archives.
* This may cause a significant amount of blocking
* while discs are accessed, and if there are no discs
* in the drive (or even not mounted on Unix systems),
* then they may not be made available anyhow. You may
* want to specify zero and handle the disc setup
* yourself.
846
*
847
* \param archivesFirst Non-zero to prepend the archives to the search path.
848
* Zero to append them. Ignored if !(archiveExt).
850
* \return nonzero on success, zero on error. Specifics of the error can be
851
* gleaned from PHYSFS_getLastError().
852
*/
853
854
__EXPORT__ int PHYSFS_setSaneConfig(const char *organization,
const char *appName,
855
856
857
const char *archiveExt,
int includeCdRoms,
int archivesFirst);
858
859
860
861
/* Directory management stuff ... */
862
/**
863
864
865
866
867
868
* \fn int PHYSFS_mkdir(const char *dirName)
* \brief Create a directory.
*
* This is specified in platform-independent notation in relation to the
* write dir. All missing parent directories are also created if they
* don't exist.
869
*
870
* So if you've got the write dir set to "C:\mygame\writedir" and call
871
* PHYSFS_mkdir("downloads/maps") then the directories
872
* "C:\mygame\writedir\downloads" and "C:\mygame\writedir\downloads\maps"
873
874
875
* will be created if possible. If the creation of "maps" fails after we
* have successfully created "downloads", then the function leaves the
* created directory behind and reports failure.
876
*
877
878
* \param dirName New dir to create.
* \return nonzero on success, zero on error. Specifics of the error can be
879
* gleaned from PHYSFS_getLastError().
880
881
*
* \sa PHYSFS_delete
882
*/
883
__EXPORT__ int PHYSFS_mkdir(const char *dirName);
884
885
886
/**
887
888
889
890
891
* \fn int PHYSFS_delete(const char *filename)
* \brief Delete a file or directory.
*
* (filename) is specified in platform-independent notation in relation to the
* write dir.
892
*
893
* A directory must be empty before this call can delete it.
894
*
895
896
897
* Deleting a symlink will remove the link, not what it points to, regardless
* of whether you "permitSymLinks" or not.
*
898
* So if you've got the write dir set to "C:\mygame\writedir" and call
899
* PHYSFS_delete("downloads/maps/level1.map") then the file
900
* "C:\mygame\writedir\downloads\maps\level1.map" is removed from the
901
902
903
* physical filesystem, if it exists and the operating system permits the
* deletion.
*
904
905
906
907
* Note that on Unix systems, deleting a file may be successful, but the
* actual file won't be removed until all processes that have an open
* filehandle to it (including your program) close their handles.
*
908
909
910
911
* Chances are, the bits that make up the file still exist, they are just
* made available to be written over at a later point. Don't consider this
* a security method or anything. :)
*
912
913
* \param filename Filename to delete.
* \return nonzero on success, zero on error. Specifics of the error can be
914
915
* gleaned from PHYSFS_getLastError().
*/
916
__EXPORT__ int PHYSFS_delete(const char *filename);
917
918
919
/**
920
921
922
923
924
925
926
927
* \fn const char *PHYSFS_getRealDir(const char *filename)
* \brief Figure out where in the search path a file resides.
*
* The file is specified in platform-independent notation. The returned
* filename will be the element of the search path where the file was found,
* which may be a directory, or an archive. Even if there are multiple
* matches in different parts of the search path, only the first one found
* is used, just like when opening a file.
928
*
929
930
* So, if you look for "maps/level1.map", and C:\\mygame is in your search
* path and C:\\mygame\\maps\\level1.map exists, then "C:\mygame" is returned.
931
*
932
933
934
* If a any part of a match is a symbolic link, and you've not explicitly
* permitted symlinks, then it will be ignored, and the search for a match
* will continue.
936
937
938
939
* If you specify a fake directory that only exists as a mount point, it'll
* be associated with the first archive mounted there, even though that
* directory isn't necessarily contained in a real archive.
*
940
941
* \param filename file to look for.
* \return READ ONLY string of element of search path containing the
942
943
* the file in question. NULL if not found.
*/
944
__EXPORT__ const char *PHYSFS_getRealDir(const char *filename);
945
946
947
/**
948
949
950
951
952
953
954
* \fn char **PHYSFS_enumerateFiles(const char *dir)
* \brief Get a file listing of a search path's directory.
*
* Matching directories are interpolated. That is, if "C:\mydir" is in the
* search path and contains a directory "savegames" that contains "x.sav",
* "y.sav", and "z.sav", and there is also a "C:\userdir" in the search path
* that has a "savegames" subdirectory with "w.sav", then the following code:
957
958
959
960
* char **rc = PHYSFS_enumerateFiles("savegames");
* char **i;
*
* for (i = rc; *i != NULL; i++)
961
* printf(" * We've got [%s].\n", *i);
962
963
*
* PHYSFS_freeList(rc);
964
* \endcode
965
966
967
*
* ...will print:
*
968
* \verbatim
969
970
971
* We've got [x.sav].
* We've got [y.sav].
* We've got [z.sav].
972
* We've got [w.sav].\endverbatim
974
975
976
* Feel free to sort the list however you like. We only promise there will
* be no duplicates, but not what order the final list will come back in.
*
977
978
979
* Don't forget to call PHYSFS_freeList() with the return value from this
* function when you are done with it.
*
980
981
* \param dir directory in platform-independent notation to enumerate.
* \return Null-terminated array of null-terminated strings.
982
983
*
* \sa PHYSFS_enumerateFilesCallback
984
*/
985
__EXPORT__ char **PHYSFS_enumerateFiles(const char *dir);
986
987
989
990
991
992
* \fn int PHYSFS_exists(const char *fname)
* \brief Determine if a file exists in the search path.
*
* Reports true if there is an entry anywhere in the search path by the
993
994
995
996
997
998
* name of (fname).
*
* Note that entries that are symlinks are ignored if
* PHYSFS_permitSymbolicLinks(1) hasn't been called, so you
* might end up further down in the search path than expected.
*
999
1000
* \param fname filename in platform-independent notation.
* \return non-zero if filename exists. zero otherwise.