dir.c
1
2
3
4
5
6
7
8
9
10
/*
* Standard directory I/O support routines for PhysicsFS.
*
* Please see the file LICENSE in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
#include <stdio.h>
#include <stdlib.h>
11
12
13
14
15
16
#include <string.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
17
#include "physfs.h"
18
19
20
21
#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
22
extern const DirFunctions __PHYSFS_DirFunctions_DIR;
23
24
static const FileFunctions __PHYSFS_FileFunctions_DIR;
static const FileFunctions __PHYSFS_FileFunctions_DIRW;
25
26
27
28
29
30
31
32
33
static int DIR_read(FileHandle *handle, void *buffer,
unsigned int objSize, unsigned int objCount)
{
FILE *h = (FILE *) (handle->opaque);
int retval;
errno = 0;
retval = fread(buffer, objSize, objCount, h);
34
BAIL_IF_MACRO((retval < objCount) && (ferror(h)),strerror(errno),retval);
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
return(retval);
} /* DIR_read */
static int DIR_write(FileHandle *handle, void *buffer,
unsigned int objSize, unsigned int objCount)
{
FILE *h = (FILE *) (handle->opaque);
int retval;
errno = 0;
retval = fwrite(buffer, objSize, objCount, h);
if ( (retval < objCount) && (ferror(h)) )
__PHYSFS_setError(strerror(errno));
return(retval);
} /* DIR_write */
static int DIR_eof(FileHandle *handle)
{
return(feof((FILE *) (handle->opaque)));
} /* DIR_eof */
static int DIR_tell(FileHandle *handle)
{
return(ftell((FILE *) (handle->opaque)));
} /* DIR_tell */
static int DIR_seek(FileHandle *handle, int offset)
{
return(fseek((FILE *) (handle->opaque), offset, SEEK_SET) == 0);
} /* DIR_seek */
73
74
75
76
77
78
static int DIR_fileLength(FileHandle *handle)
{
return(__PHYSFS_platformFileLength((FILE *) (handle->opaque)));
} /* DIR_fileLength */
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
static int DIR_fileClose(FileHandle *handle)
{
FILE *h = (FILE *) (handle->opaque);
/*
* we manually fflush() the buffer, since that's the place fclose() will
* most likely fail, but that will leave the file handle in an undefined
* state if it fails. fflush() failures we can recover from.
*/
/* keep trying until there's success or an unrecoverable error... */
do {
__PHYSFS_platformTimeslice();
errno = 0;
} while ( (fflush(h) == EOF) && ((errno == EAGAIN) || (errno == EINTR)) );
/* EBADF == "Not open for writing". That's fine. */
BAIL_IF_MACRO((errno != 0) && (errno != EBADF), strerror(errno), 0);
/* if fclose fails anyhow, we just have to pray that it's still usable. */
errno = 0;
BAIL_IF_MACRO(fclose(h) == EOF, strerror(errno), 0); /* (*shrug*) */
free(handle);
return(1);
} /* DIR_fileClose */
static int DIR_isArchive(const char *filename, int forWriting)
{
/* directories ARE archives in this driver... */
return(__PHYSFS_platformIsDirectory(filename));
} /* DIR_isArchive */
static DirHandle *DIR_openArchive(const char *name, int forWriting)
{
116
const char *dirsep = PHYSFS_getDirSeparator();
117
118
119
120
DirHandle *retval = NULL;
int namelen = strlen(name);
int seplen = strlen(dirsep);
121
122
BAIL_IF_MACRO(!DIR_isArchive(name, forWriting),
ERR_UNSUPPORTED_ARCHIVE, NULL);
123
124
125
126
127
128
129
retval = malloc(sizeof (DirHandle));
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
retval->opaque = malloc(namelen + seplen + 1);
if (retval->opaque == NULL)
{
free(retval);
130
BAIL_IF_MACRO(1, ERR_OUT_OF_MEMORY, NULL);
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
} /* if */
/* make sure there's a dir separator at the end of the string */
strcpy((char *) (retval->opaque), name);
if (strcmp((name + namelen) - seplen, dirsep) != 0)
strcat((char *) (retval->opaque), dirsep);
retval->funcs = &__PHYSFS_DirFunctions_DIR;
return(retval);
} /* DIR_openArchive */
static LinkedStringList *DIR_enumerateFiles(DirHandle *h, const char *dname)
{
char *d = __PHYSFS_platformCvtToDependent((char *)(h->opaque),dname,NULL);
LinkedStringList *retval;
BAIL_IF_MACRO(d == NULL, NULL, NULL);
retval = __PHYSFS_platformEnumerateFiles(d);
free(d);
return(retval);
} /* DIR_enumerateFiles */
static int DIR_exists(DirHandle *h, const char *name)
{
char *f = __PHYSFS_platformCvtToDependent((char *)(h->opaque), name, NULL);
int retval;
BAIL_IF_MACRO(f == NULL, NULL, 0);
retval = __PHYSFS_platformExists(f);
free(f);
return(retval);
} /* DIR_exists */
static int DIR_isDirectory(DirHandle *h, const char *name)
{
char *d = __PHYSFS_platformCvtToDependent((char *)(h->opaque), name, NULL);
int retval;
BAIL_IF_MACRO(d == NULL, NULL, 0);
retval = __PHYSFS_platformIsDirectory(d);
free(d);
return(retval);
} /* DIR_isDirectory */
static int DIR_isSymLink(DirHandle *h, const char *name)
{
char *f = __PHYSFS_platformCvtToDependent((char *)(h->opaque), name, NULL);
int retval;
BAIL_IF_MACRO(f == NULL, NULL, 0); /* !!! might be a problem. */
retval = __PHYSFS_platformIsSymLink(f);
free(f);
return(retval);
} /* DIR_isSymLink */
static FileHandle *doOpen(DirHandle *h, const char *name, const char *mode)
{
char *f = __PHYSFS_platformCvtToDependent((char *)(h->opaque), name, NULL);
FILE *rc;
FileHandle *retval;
char *str;
BAIL_IF_MACRO(f == NULL, NULL, NULL);
retval = (FileHandle *) malloc(sizeof (FileHandle));
if (!retval)
{
free(f);
204
BAIL_IF_MACRO(1, ERR_OUT_OF_MEMORY, NULL);
205
206
207
208
209
210
211
212
213
214
} /* if */
errno = 0;
rc = fopen(f, mode);
str = strerror(errno);
free(f);
if (!rc)
{
free(retval);
215
BAIL_IF_MACRO(1, str, NULL);
216
217
218
219
} /* if */
retval->opaque = (void *) rc;
retval->dirHandle = h;
220
retval->funcs = &__PHYSFS_FileFunctions_DIR;
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
return(retval);
} /* doOpen */
static FileHandle *DIR_openRead(DirHandle *h, const char *filename)
{
return(doOpen(h, filename, "rb"));
} /* DIR_openRead */
static FileHandle *DIR_openWrite(DirHandle *h, const char *filename)
{
return(doOpen(h, filename, "wb"));
} /* DIR_openWrite */
static FileHandle *DIR_openAppend(DirHandle *h, const char *filename)
{
return(doOpen(h, filename, "ab"));
} /* DIR_openAppend */
static int DIR_remove(DirHandle *h, const char *name)
{
char *f = __PHYSFS_platformCvtToDependent((char *)(h->opaque), name, NULL);
int retval;
BAIL_IF_MACRO(f == NULL, NULL, 0);
errno = 0;
retval = (remove(f) == 0);
if (!retval)
__PHYSFS_setError(strerror(errno));
free(f);
return(retval);
} /* DIR_remove */
static int DIR_mkdir(DirHandle *h, const char *name)
{
char *f = __PHYSFS_platformCvtToDependent((char *)(h->opaque), name, NULL);
int retval;
BAIL_IF_MACRO(f == NULL, NULL, 0);
errno = 0;
retval = (mkdir(f, S_IRWXU) == 0);
if (!retval)
__PHYSFS_setError(strerror(errno));
free(f);
return(retval);
} /* DIR_mkdir */
static void DIR_dirClose(DirHandle *h)
{
free(h->opaque);
free(h);
} /* DIR_dirClose */
285
static const FileFunctions __PHYSFS_FileFunctions_DIR =
287
288
289
290
291
DIR_read, /* read() method */
NULL, /* write() method */
DIR_eof, /* eof() method */
DIR_tell, /* tell() method */
DIR_seek, /* seek() method */
292
293
DIR_fileLength, /* fileLength() method */
DIR_fileClose /* fileClose() method */
294
295
296
};
297
static const FileFunctions __PHYSFS_FileFunctions_DIRW =
299
300
301
302
303
304
305
NULL, /* read() method */
DIR_write, /* write() method */
DIR_eof, /* eof() method */
DIR_tell, /* tell() method */
DIR_seek, /* seek() method */
DIR_fileLength, /* fileLength() method */
DIR_fileClose /* fileClose() method */
306
307
308
309
310
};
const DirFunctions __PHYSFS_DirFunctions_DIR =
{
311
312
313
314
315
316
317
318
319
320
321
DIR_isArchive, /* isArchive() method */
DIR_openArchive, /* openArchive() method */
DIR_enumerateFiles, /* enumerateFiles() method */
DIR_exists, /* exists() method */
DIR_isDirectory, /* isDirectory() method */
DIR_isSymLink, /* isSymLink() method */
DIR_openRead, /* openRead() method */
DIR_openWrite, /* openWrite() method */
DIR_openAppend, /* openAppend() method */
DIR_remove, /* remove() method */
DIR_mkdir, /* mkdir() method */
322
DIR_dirClose /* dirClose() method */
323
324
325
326
327
};
/* This doesn't get listed, since it's technically not an archive... */
#if 0
328
const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_DIR =
329
330
331
332
333
334
335
{
"DIR",
"non-archive directory I/O"
};
#endif
/* end of dir.c ... */