1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
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
204
205
206
207
208
209
210
211
212
213
214
215
216
217
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
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
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
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
349
350
351
352
353
354
355
356
357
358
359
360
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
461
462
463
464
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#if defined(__amigaos4__)
#include "backends/fs/amigaos4/amigaos4-fs.h"
#include "backends/fs/stdiostream.h"
#include "common/debug.h"
#include "common/util.h"
#define ENTER() /* debug(6, "Enter") */
#define LEAVE() /* debug(6, "Leave") */
/**
* Returns the last component of a given path.
*
* @param str Common::String containing the path.
* @return Pointer to the first char of the last component inside str.
*/
const char *lastPathComponent(const Common::String &str) {
int offset = str.size();
if (offset <= 0) {
debug(6, "Bad offset");
return 0;
}
const char *p = str.c_str();
while (offset > 0 && (p[offset-1] == '/' || p[offset-1] == ':'))
offset--;
while (offset > 0 && (p[offset-1] != '/' && p[offset-1] != ':'))
offset--;
return p + offset;
}
AmigaOSFilesystemNode::AmigaOSFilesystemNode() {
ENTER();
_sDisplayName = "Available Disks";
_bIsValid = true;
_bIsDirectory = true;
_sPath = "";
_pFileLock = 0;
_nProt = 0; // Protection is ignored for the root volume.
LEAVE();
}
AmigaOSFilesystemNode::AmigaOSFilesystemNode(const Common::String &p) {
ENTER();
// We need to explicitely open dos.library and it's IDOS interface.
// Otherwise we will hit an IDOS NULL pointer after compiling a shared
// binary with (shared) plugins.
// The hit will happen on loading a game from any engine, if more
// than one engine/plugin is available.
DOSBase=IExec->OpenLibrary("dos.library",0);
IDOS = (struct DOSIFace *)IExec->GetInterface(DOSBase, "main", 1, NULL);
int offset = p.size();
//assert(offset > 0);
if (offset <= 0) {
debug(6, "Bad offset");
return;
}
_sPath = p;
_sDisplayName = ::lastPathComponent(_sPath);
_pFileLock = 0;
_bIsDirectory = false;
_bIsValid = false;
// Check whether the node exists and if it's a directory.
struct ExamineData * pExd = IDOS->ExamineObjectTags(EX_StringNameInput,_sPath.c_str(),TAG_END);
if (pExd) {
_nProt = pExd->Protection;
if (EXD_IS_DIRECTORY(pExd)) {
_bIsDirectory = true;
_pFileLock = IDOS->Lock((CONST_STRPTR)_sPath.c_str(), SHARED_LOCK);
_bIsValid = (_pFileLock != 0);
// Add a trailing slash if needed.
const char c = _sPath.lastChar();
if (c != '/' && c != ':')
_sPath += '/';
} else {
//_bIsDirectory = false;
_bIsValid = true;
}
IDOS->FreeDosObject(DOS_EXAMINEDATA, pExd);
}
// Close dos.library and it's IDOS interface again.
IExec->DropInterface((struct Interface *)IDOS);
IExec->CloseLibrary(DOSBase);
LEAVE();
}
AmigaOSFilesystemNode::AmigaOSFilesystemNode(BPTR pLock, const char *pDisplayName) {
ENTER();
int bufSize = MAXPATHLEN;
_pFileLock = 0;
while (true) {
char *n = new char[bufSize];
if (IDOS->NameFromLock(pLock, (STRPTR)n, bufSize) != DOSFALSE) {
_sPath = n;
_sDisplayName = pDisplayName ? pDisplayName : IDOS->FilePart((STRPTR)n);
delete[] n;
break;
}
if (IDOS->IoErr() != ERROR_LINE_TOO_LONG) {
_bIsValid = false;
debug(6, "IoErr() != ERROR_LINE_TOO_LONG");
LEAVE();
delete[] n;
return;
}
bufSize *= 2;
delete[] n;
}
_bIsValid = false;
_bIsDirectory = false;
struct ExamineData * pExd = IDOS->ExamineObjectTags(EX_FileLockInput,pLock,TAG_END);
if (pExd) {
_nProt = pExd->Protection;
if (EXD_IS_DIRECTORY(pExd)) {
_bIsDirectory = true;
_pFileLock = IDOS->DupLock(pLock);
_bIsValid = _pFileLock != 0;
const char c = _sPath.lastChar();
if (c != '/' && c != ':')
_sPath += '/';
} else {
//_bIsDirectory = false;
_bIsValid = true;
}
IDOS->FreeDosObject(DOS_EXAMINEDATA, pExd);
} else {
debug(6, "ExamineObject() returned NULL");
}
LEAVE();
}
// We need the custom copy constructor because of DupLock().
AmigaOSFilesystemNode::AmigaOSFilesystemNode(const AmigaOSFilesystemNode& node)
: AbstractFSNode() {
ENTER();
_sDisplayName = node._sDisplayName;
_bIsValid = node._bIsValid;
_bIsDirectory = node._bIsDirectory;
_sPath = node._sPath;
_pFileLock = IDOS->DupLock(node._pFileLock);
_nProt = node._nProt;
LEAVE();
}
AmigaOSFilesystemNode::~AmigaOSFilesystemNode() {
ENTER();
if (_pFileLock)
IDOS->UnLock(_pFileLock);
LEAVE();
}
bool AmigaOSFilesystemNode::exists() const {
ENTER();
if (_sPath.empty())
return false;
bool nodeExists = false;
// Previously we were trying to examine the node in order
// to determine if the node exists or not.
// I don't see the point : once you have been granted a
// lock on it, it means it exists...
//
// ============================= Old code
// BPTR pLock = IDOS->Lock((STRPTR)_sPath.c_str(), SHARED_LOCK);
// if (pLock)
// {
// if (IDOS->Examine(pLock, fib) != DOSFALSE)
// nodeExists = true;
// IDOS->UnLock(pLock);
// }
//
// IDOS->FreeDosObject(DOS_FIB, fib);
//
// ============================= New code
BPTR pLock = IDOS->Lock(_sPath.c_str(), SHARED_LOCK);
if (pLock) {
nodeExists = true;
IDOS->UnLock(pLock);
}
LEAVE();
return nodeExists;
}
AbstractFSNode *AmigaOSFilesystemNode::getChild(const Common::String &n) const {
ENTER();
if (!_bIsDirectory) {
debug(6, "Not a directory");
return 0;
}
Common::String newPath(_sPath);
if (_sPath.lastChar() != '/')
newPath += '/';
newPath += n;
LEAVE();
return new AmigaOSFilesystemNode(newPath);
}
bool AmigaOSFilesystemNode::getChildren(AbstractFSList &myList, ListMode mode, bool hidden) const {
ENTER();
bool ret = false;
if (!_bIsValid) {
debug(6, "Invalid node");
LEAVE();
return false; // Empty list
}
if (!_bIsDirectory) {
debug(6, "Not a directory");
LEAVE();
return false; // Empty list
}
if (isRootNode()) {
debug(6, "Root node");
LEAVE();
myList = listVolumes();
return true;
}
APTR context = IDOS->ObtainDirContextTags( EX_FileLockInput, _pFileLock,
EX_DoCurrentDir, TRUE, /* for softlinks */
EX_DataFields, (EXF_NAME|EXF_LINK|EXF_TYPE),
TAG_END);
if (context) {
struct ExamineData * pExd = NULL; // NB: No need to free the value after usage, everything will be dealt with by the DirContext release
AmigaOSFilesystemNode *entry;
while ( (pExd = IDOS->ExamineDir(context)) ) {
if ( (EXD_IS_FILE(pExd) && ( Common::FSNode::kListFilesOnly == mode ))
|| (EXD_IS_DIRECTORY(pExd) && ( Common::FSNode::kListDirectoriesOnly == mode ))
|| Common::FSNode::kListAll == mode
)
{
BPTR pLock = IDOS->Lock( pExd->Name, SHARED_LOCK );
if (pLock) {
entry = new AmigaOSFilesystemNode( pLock, pExd->Name );
if (entry) {
myList.push_back(entry);
}
IDOS->UnLock(pLock);
}
}
}
if (ERROR_NO_MORE_ENTRIES != IDOS->IoErr() ) {
debug(6, "An error occurred during ExamineDir");
ret = false;
} else {
ret = true;
}
IDOS->ReleaseDirContext(context);
} else {
debug(6, "Unable to ObtainDirContext");
ret = false;
}
LEAVE();
return ret;
}
AbstractFSNode *AmigaOSFilesystemNode::getParent() const {
ENTER();
if (isRootNode()) {
debug(6, "Root node");
LEAVE();
return new AmigaOSFilesystemNode(*this);
}
BPTR pLock = _pFileLock;
if (!_bIsDirectory) {
assert(!pLock);
pLock = IDOS->Lock((CONST_STRPTR)_sPath.c_str(), SHARED_LOCK);
assert(pLock);
}
AmigaOSFilesystemNode *node;
BPTR parentDir = IDOS->ParentDir( pLock );
if (parentDir) {
node = new AmigaOSFilesystemNode(parentDir);
IDOS->UnLock(parentDir);
} else
node = new AmigaOSFilesystemNode();
if (!_bIsDirectory) {
IDOS->UnLock(pLock);
}
LEAVE();
return node;
}
bool AmigaOSFilesystemNode::isReadable() const {
if (!_bIsValid)
return false;
// Regular RWED protection flags are low-active or inverted,
// thus the negation. Moreover, a pseudo root filesystem is
// readable whatever the protection says.
bool readable = !(_nProt & EXDF_OTR_READ) || isRootNode();
return readable;
}
bool AmigaOSFilesystemNode::isWritable() const {
if (!_bIsValid)
return false;
// Regular RWED protection flags are low-active or inverted,
// thus the negation. Moreover, a pseudo root filesystem is
// never writable whatever the protection says.
// (Because of it's pseudo nature).
bool writable = !(_nProt & EXDF_OTR_WRITE) && !isRootNode();
return writable;
}
AbstractFSList AmigaOSFilesystemNode::listVolumes() const {
ENTER();
AbstractFSList myList;
const uint32 kLockFlags = LDF_READ | LDF_VOLUMES;
char buffer[MAXPATHLEN];
struct DosList *dosList = IDOS->LockDosList(kLockFlags);
if (!dosList) {
debug(6, "Cannot lock the DOS list");
LEAVE();
return myList;
}
dosList = IDOS->NextDosEntry(dosList, LDF_VOLUMES);
while (dosList) {
if (dosList->dol_Type == DLT_VOLUME &&
dosList->dol_Name &&
dosList->dol_Port) {
// The original line was
//
// if (dosList->dol_Type == DLT_VOLUME &&
// dosList->dol_Name &&
// dosList->dol_Task) {
//
// which errored using SDK 53.24 with a
// 'struct dosList' has no member called 'dol_Task'
// The reason for that was, that
// 1) dol_Task wasn't a task pointer, it is a message port instead.
// 2) it was redefined to be dol_Port in dos/obsolete.h in aforementioned SDK.
// Copy name to buffer.
IDOS->CopyStringBSTRToC(dosList->dol_Name, buffer, MAXPATHLEN);
// Volume name + '\0'.
char *volName = new char [strlen(buffer) + 1];
strcpy(volName, buffer);
strcat(buffer, ":");
BPTR volumeLock = IDOS->Lock((STRPTR)buffer, SHARED_LOCK);
if (volumeLock) {
char *devName = new char [MAXPATHLEN];
// Find device name.
IDOS->DevNameFromLock(volumeLock, devName, MAXPATHLEN, DN_DEVICEONLY);
sprintf(buffer, "%s (%s)", volName, devName);
delete[] devName;
AmigaOSFilesystemNode *entry = new AmigaOSFilesystemNode(volumeLock, buffer);
if (entry) {
myList.push_back(entry);
}
IDOS->UnLock(volumeLock);
}
delete[] volName;
}
dosList = IDOS->NextDosEntry(dosList, LDF_VOLUMES);
}
IDOS->UnLockDosList(kLockFlags);
LEAVE();
return myList;
}
Common::SeekableReadStream *AmigaOSFilesystemNode::createReadStream() {
return StdioStream::makeFromPath(getPath(), false);
}
Common::WriteStream *AmigaOSFilesystemNode::createWriteStream() {
return StdioStream::makeFromPath(getPath(), true);
}
bool AmigaOSFilesystemNode::createDirectory() {
warning("AmigaOSFilesystemNode::createDirectory(): Not supported");
return _bIsValid && _bIsDirectory;
}
#endif //defined(__amigaos4__)
|