1
10
13
14
20
21
22
23
24
25
26
27
28
34
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
73
74
75
76
77
78
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
108
109
110
111
114
115
116
117
118
119
120
121
122
123
129
130
131
132
133
134
135
136
137
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
179
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
218
219
220
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
253
254
255
257
258
259
260
261
262
266
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
291
292
293
294
299
300
301
302
303
304
305
308
309
314
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
463
464
465
466
469
470
471
472
473
474
475
476
477
...
...
...
#define FX_SOURCE_CODE
#include "fx_api.h"
#include "fx_system.h"
#include "fx_directory.h"
#include "fx_file.h"
#include "fx_utility.h"
5 includes#ifdef FX_ENABLE_FAULT_TOLERANT
#include "fx_fault_tolerant.h"
#endif
...
...
UINT _fx_file_delete(FX_MEDIA *media_ptr, CHAR *file_name)
{
UINT status;
ULONG cluster;
ULONG contents;
ULONG open_count;
FX_FILE *search_ptr;
ULONG cluster_count;
FX_DIR_ENTRY dir_entry;
UCHAR not_a_file_attr;
#ifdef FX_ENABLE_EXFAT
ULONG bytes_per_cluster;
ULONG clusters_count;/* ... */
#endif
#ifndef FX_MEDIA_STATISTICS_DISABLE
media_ptr -> fx_media_file_deletes++;/* ... */
#endif
dir_entry.fx_dir_entry_name = media_ptr -> fx_media_name_buffer + FX_MAX_LONG_NAME_LEN;
dir_entry.fx_dir_entry_short_name[0] = 0;
if (media_ptr -> fx_media_id != FX_MEDIA_ID)
{
return(FX_MEDIA_NOT_OPEN);
}if (media_ptr -> fx_media_id != FX_MEDIA_ID) { ... }
FX_TRACE_IN_LINE_INSERT(FX_TRACE_FILE_DELETE, media_ptr, file_name, 0, 0, FX_TRACE_FILE_EVENTS, 0, 0)
FX_PROTECT
#ifdef FX_ENABLE_FAULT_TOLERANT
_fx_fault_tolerant_transaction_start(media_ptr);/* ... */
#endif
if (media_ptr -> fx_media_driver_write_protect)
{
#ifdef FX_ENABLE_FAULT_TOLERANT
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif
FX_UNPROTECT
return(FX_WRITE_PROTECT);
}if (media_ptr -> fx_media_driver_write_protect) { ... }
status = _fx_directory_search(media_ptr, file_name, &dir_entry, FX_NULL, FX_NULL);
if (status != FX_SUCCESS)
{
#ifdef FX_ENABLE_FAULT_TOLERANT
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif
FX_UNPROTECT
return(status);
}if (status != FX_SUCCESS) { ... }
#ifdef FX_ENABLE_EXFAT
if (media_ptr -> fx_media_FAT_type == FX_exFAT)
{
not_a_file_attr = FX_DIRECTORY;
}if (media_ptr -> fx_media_FAT_type == FX_exFAT) { ... }
else
{
#endif
not_a_file_attr = FX_DIRECTORY | FX_VOLUME;
#ifdef FX_ENABLE_EXFAT
}else { ... }
#endif
if (dir_entry.fx_dir_entry_attributes & not_a_file_attr)
{
#ifdef FX_ENABLE_FAULT_TOLERANT
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif
FX_UNPROTECT
return(FX_NOT_A_FILE);
}if (dir_entry.fx_dir_entry_attributes & not_a_file_attr) { ... }
if (dir_entry.fx_dir_entry_attributes & (UCHAR)(FX_READ_ONLY))
{
#ifdef FX_ENABLE_FAULT_TOLERANT
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif
FX_UNPROTECT
return(FX_WRITE_PROTECT);
}if (dir_entry.fx_dir_entry_attributes & (UCHAR)(FX_READ_ONLY)) { ... }
/* ... */
open_count = media_ptr -> fx_media_opened_file_count;
search_ptr = media_ptr -> fx_media_opened_file_list;
while (open_count)
{
if ((search_ptr -> fx_file_dir_entry.fx_dir_entry_log_sector == dir_entry.fx_dir_entry_log_sector) &&
(search_ptr -> fx_file_dir_entry.fx_dir_entry_byte_offset == dir_entry.fx_dir_entry_byte_offset))
{
#ifdef FX_ENABLE_FAULT_TOLERANT
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif
FX_UNPROTECT
return(FX_ACCESS_ERROR);
}if ((search_ptr -> fx_file_dir_entry.fx_dir_entry_log_sector == dir_entry.fx_dir_entry_log_sector) && (search_ptr -> fx_file_dir_entry.fx_dir_entry_byte_offset == dir_entry.fx_dir_entry_byte_offset)) { ... }
search_ptr = search_ptr -> fx_file_opened_next;
open_count--;
}while (open_count) { ... }
cluster = dir_entry.fx_dir_entry_cluster;
#ifndef FX_MEDIA_DISABLE_SEARCH_CACHE
media_ptr -> fx_media_last_found_name[0] = FX_NULL;/* ... */
#endif
/* ... */
dir_entry.fx_dir_entry_name[0] = (CHAR)FX_DIR_ENTRY_FREE;
dir_entry.fx_dir_entry_short_name[0] = (CHAR)FX_DIR_ENTRY_FREE;
#ifdef FX_ENABLE_EXFAT
if (media_ptr -> fx_media_FAT_type == FX_exFAT)
{
status = _fx_directory_exFAT_entry_write(media_ptr, &dir_entry, UPDATE_DELETE);
}if (media_ptr -> fx_media_FAT_type == FX_exFAT) { ... }
else
{
#endif
status = _fx_directory_entry_write(media_ptr, &dir_entry);
#ifdef FX_ENABLE_EXFAT
}else { ... }
#endif
if (status != FX_SUCCESS)
{
#ifdef FX_ENABLE_FAULT_TOLERANT
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif
FX_UNPROTECT
return(status);
}if (status != FX_SUCCESS) { ... }
/* ... */
cluster_count = 0;
#ifdef FX_ENABLE_EXFAT
bytes_per_cluster = ((ULONG)media_ptr -> fx_media_bytes_per_sector) *
((ULONG)media_ptr -> fx_media_sectors_per_cluster);
clusters_count =
(ULONG)((dir_entry.fx_dir_entry_file_size + bytes_per_cluster - 1) / bytes_per_cluster - 1);/* ... */
#endif
#ifdef FX_ENABLE_FAULT_TOLERANT
if (media_ptr -> fx_media_fault_tolerant_enabled)
{
/* ... */
#ifdef FX_ENABLE_EXFAT
if (dir_entry.fx_dir_entry_dont_use_fat & 1)
{
status = _fx_fault_tolerant_set_FAT_chain(media_ptr, FX_TRUE, 0,
media_ptr -> fx_media_fat_last, cluster, cluster + clusters_count);
}if (dir_entry.fx_dir_entry_dont_use_fat & 1) { ... }
else
{
#endif
status = _fx_fault_tolerant_set_FAT_chain(media_ptr, FX_FALSE, 0,
media_ptr -> fx_media_fat_last, cluster, media_ptr -> fx_media_fat_last);
#ifdef FX_ENABLE_EXFAT
}else { ... }
#endif
if (status != FX_SUCCESS)
{
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
FX_UNPROTECT
return(status);
}if (status != FX_SUCCESS) { ... }
}if (media_ptr -> fx_media_fault_tolerant_enabled) { ... }
else
{
#endif
while ((cluster >= FX_FAT_ENTRY_START) && (cluster < media_ptr -> fx_media_fat_reserved))
{
cluster_count++;
#ifdef FX_ENABLE_EXFAT
if (dir_entry.fx_dir_entry_dont_use_fat & 1)
{
if (cluster_count - 1 >= clusters_count)
{
contents = FX_LAST_CLUSTER_exFAT;
}if (cluster_count - 1 >= clusters_count) { ... }
else
{
contents = cluster + 1;
}else { ... }
}if (dir_entry.fx_dir_entry_dont_use_fat & 1) { ... }
else
{
#endif
status = _fx_utility_FAT_entry_read(media_ptr, cluster, &contents);
if (status != FX_SUCCESS)
{
#ifdef FX_ENABLE_FAULT_TOLERANT
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif
FX_UNPROTECT
return(status);
}if (status != FX_SUCCESS) { ... }
#ifdef FX_ENABLE_EXFAT
}else { ... }
#endif
if ((cluster == contents) || (cluster_count > media_ptr -> fx_media_total_clusters))
{
#ifdef FX_ENABLE_FAULT_TOLERANT
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif
FX_UNPROTECT
return(FX_FAT_READ_ERROR);
}if ((cluster == contents) || (cluster_count > media_ptr -> fx_media_total_clusters)) { ... }
#ifdef FX_ENABLE_EXFAT
if (!(dir_entry.fx_dir_entry_dont_use_fat & 1))
{
#endif
status = _fx_utility_FAT_entry_write(media_ptr, cluster, FX_FREE_CLUSTER);
if (status != FX_SUCCESS)
{
#ifdef FX_ENABLE_FAULT_TOLERANT
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif
FX_UNPROTECT
return(status);
}if (status != FX_SUCCESS) { ... }
#ifdef FX_ENABLE_EXFAT
}if (!(dir_entry.fx_dir_entry_dont_use_fat & 1)) { ... }
if (media_ptr -> fx_media_FAT_type == FX_exFAT)
{
status = _fx_utility_exFAT_cluster_state_set(media_ptr, cluster, FX_EXFAT_BITMAP_CLUSTER_FREE);
if (status != FX_SUCCESS)
{
#ifdef FX_ENABLE_FAULT_TOLERANT
FX_FAULT_TOLERANT_TRANSACTION_FAIL(media_ptr);
#endif
FX_UNPROTECT
return(status);
}if (status != FX_SUCCESS) { ... }
}if (media_ptr -> fx_media_FAT_type == FX_exFAT) { ... }
#endif
cluster = contents;
}while ((cluster >= FX_FAT_ENTRY_START) && (cluster < media_ptr -> fx_media_fat_reserved)) { ... }
#ifdef FX_ENABLE_FAULT_TOLERANT
}else { ... }
#endif
media_ptr -> fx_media_available_clusters =
media_ptr -> fx_media_available_clusters + cluster_count;
#ifdef FX_FAULT_TOLERANT
_fx_utility_FAT_flush(media_ptr);/* ... */
#endif
#ifdef FX_ENABLE_FAULT_TOLERANT
status = _fx_fault_tolerant_transaction_end(media_ptr);/* ... */
#endif
FX_UNPROTECT
return(status);
}{ ... }