ReactOS 0.4.15-dev-7788-g1ad9096
disk.c
Go to the documentation of this file.
1/*
2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS system libraries
4 * FILE: dll/win32/kernel32/client/file/disk.c
5 * PURPOSE: Disk and Drive functions
6 * PROGRAMMER: Ariadne ( ariadne@xs4all.nl)
7 * Erik Bos, Alexandre Julliard :
8 * GetLogicalDriveStringsA,
9 * GetLogicalDriveStringsW, GetLogicalDrives
10 * UPDATE HISTORY:
11 * Created 01/11/98
12 */
13//WINE copyright notice:
14/*
15 * DOS drives handling functions
16 *
17 * Copyright 1993 Erik Bos
18 * Copyright 1996 Alexandre Julliard
19 */
20
21#include <k32.h>
22
23#define NDEBUG
24#include <debug.h>
25
26#define MAX_DOS_DRIVES 26
27
28/*
29 * @implemented
30 */
31/* Synced to Wine-2008/12/28 */
36{
38 DWORD dwDriveMap;
39 LPSTR p;
40
41 dwDriveMap = GetLogicalDrives();
42
43 for (drive = count = 0; drive < MAX_DOS_DRIVES; drive++)
44 {
45 if (dwDriveMap & (1<<drive))
46 count++;
47 }
48
49
50 if ((count * 4) + 1 > nBufferLength) return ((count * 4) + 1);
51
52 p = lpBuffer;
53
54 for (drive = 0; drive < MAX_DOS_DRIVES; drive++)
55 if (dwDriveMap & (1<<drive))
56 {
57 *p++ = 'A' + (UCHAR)drive;
58 *p++ = ':';
59 *p++ = '\\';
60 *p++ = '\0';
61 }
62 *p = '\0';
63
64 return (count * 4);
65}
66
67/*
68 * @implemented
69 */
70/* Synced to Wine-2008/12/28 */
75{
77 DWORD dwDriveMap;
78 LPWSTR p;
79
80 dwDriveMap = GetLogicalDrives();
81
82 for (drive = count = 0; drive < MAX_DOS_DRIVES; drive++)
83 {
84 if (dwDriveMap & (1<<drive))
85 count++;
86 }
87
88 if ((count * 4) + 1 > nBufferLength) return ((count * 4) + 1);
89
90 p = lpBuffer;
91 for (drive = 0; drive < MAX_DOS_DRIVES; drive++)
92 if (dwDriveMap & (1<<drive))
93 {
94 *p++ = (WCHAR)('A' + drive);
95 *p++ = (WCHAR)':';
96 *p++ = (WCHAR)'\\';
97 *p++ = (WCHAR)'\0';
98 }
99 *p = (WCHAR)'\0';
100
101 return (count * 4);
102}
103
104/*
105 * @implemented
106 */
107/* Synced to Wine-? */
108DWORD
109WINAPI
111{
113 PROCESS_DEVICEMAP_INFORMATION ProcessDeviceMapInfo;
114
115 /* Get the Device Map for this Process */
118 &ProcessDeviceMapInfo.Query,
119 sizeof(ProcessDeviceMapInfo.Query),
120 NULL);
121
122 /* Return the Drive Map */
123 if (!NT_SUCCESS(Status))
124 {
126 return 0;
127 }
128
129 if (ProcessDeviceMapInfo.Query.DriveMap == 0)
130 {
132 }
133
134 return ProcessDeviceMapInfo.Query.DriveMap;
135}
136
137/*
138 * @implemented
139 */
140BOOL
141WINAPI
143 OUT LPDWORD lpSectorsPerCluster,
144 OUT LPDWORD lpBytesPerSector,
145 OUT LPDWORD lpNumberOfFreeClusters,
146 OUT LPDWORD lpTotalNumberOfClusters)
147{
148 PCSTR RootPath;
149 PUNICODE_STRING RootPathU;
150
151 RootPath = lpRootPathName;
152 if (RootPath == NULL)
153 {
154 RootPath = "\\";
155 }
156
157 RootPathU = Basep8BitStringToStaticUnicodeString(RootPath);
158 if (RootPathU == NULL)
159 {
160 return FALSE;
161 }
162
163 return GetDiskFreeSpaceW(RootPathU->Buffer, lpSectorsPerCluster,
164 lpBytesPerSector, lpNumberOfFreeClusters,
165 lpTotalNumberOfClusters);
166}
167
168/*
169 * @implemented
170 */
171BOOL
172WINAPI
174 OUT LPDWORD lpSectorsPerCluster,
175 OUT LPDWORD lpBytesPerSector,
176 OUT LPDWORD lpNumberOfFreeClusters,
177 OUT LPDWORD lpTotalNumberOfClusters)
178{
179 BOOL Below2GB;
180 PCWSTR RootPath;
182 HANDLE RootHandle;
186 FILE_FS_SIZE_INFORMATION FileFsSize;
187
188 /* If no path provided, get root path */
189 RootPath = lpRootPathName;
190 if (lpRootPathName == NULL)
191 {
192 RootPath = L"\\";
193 }
194
195 /* Convert the path to NT path */
197 {
199 return FALSE;
200 }
201
202 /* Open it for disk space query! */
208 if (!NT_SUCCESS(Status))
209 {
211 RtlFreeHeap(RtlGetProcessHeap(), 0, FileName.Buffer);
212 if (lpBytesPerSector != NULL)
213 {
214 *lpBytesPerSector = 0;
215 }
216
217 return FALSE;
218 }
219
220 /* We don't need the name any longer */
221 RtlFreeHeap(RtlGetProcessHeap(), 0, FileName.Buffer);
222
223 /* Query disk space! */
224 Status = NtQueryVolumeInformationFile(RootHandle, &IoStatusBlock, &FileFsSize,
227 NtClose(RootHandle);
228 if (!NT_SUCCESS(Status))
229 {
231 return FALSE;
232 }
233
234 /* Are we in some compatibility mode where size must be below 2GB? */
235 Below2GB = ((NtCurrentPeb()->AppCompatFlags.LowPart & GetDiskFreeSpace2GB) == GetDiskFreeSpace2GB);
236
237 /* If we're to overflow output, make sure we return the maximum */
238 if (FileFsSize.TotalAllocationUnits.HighPart != 0)
239 {
240 FileFsSize.TotalAllocationUnits.LowPart = -1;
241 }
242
243 if (FileFsSize.AvailableAllocationUnits.HighPart != 0)
244 {
245 FileFsSize.AvailableAllocationUnits.LowPart = -1;
246 }
247
248 /* Return what user asked for */
249 if (lpSectorsPerCluster != NULL)
250 {
251 *lpSectorsPerCluster = FileFsSize.SectorsPerAllocationUnit;
252 }
253
254 if (lpBytesPerSector != NULL)
255 {
256 *lpBytesPerSector = FileFsSize.BytesPerSector;
257 }
258
259 if (lpNumberOfFreeClusters != NULL)
260 {
261 if (!Below2GB)
262 {
263 *lpNumberOfFreeClusters = FileFsSize.AvailableAllocationUnits.LowPart;
264 }
265 /* If we have to remain below 2GB... */
266 else
267 {
269
270 /* Compute how many clusters there are in less than 2GB: 2 * 1024 * 1024 * 1024- 1 */
271 FreeClusters = 0x7FFFFFFF / (FileFsSize.SectorsPerAllocationUnit * FileFsSize.BytesPerSector);
272 /* If that's higher than what was queried, then return the queried value, it's OK! */
274 {
276 }
277
278 *lpNumberOfFreeClusters = FreeClusters;
279 }
280 }
281
282 if (lpTotalNumberOfClusters != NULL)
283 {
284 if (!Below2GB)
285 {
286 *lpTotalNumberOfClusters = FileFsSize.TotalAllocationUnits.LowPart;
287 }
288 /* If we have to remain below 2GB... */
289 else
290 {
291 DWORD TotalClusters;
292
293 /* Compute how many clusters there are in less than 2GB: 2 * 1024 * 1024 * 1024- 1 */
294 TotalClusters = 0x7FFFFFFF / (FileFsSize.SectorsPerAllocationUnit * FileFsSize.BytesPerSector);
295 /* If that's higher than what was queried, then return the queried value, it's OK! */
296 if (TotalClusters > FileFsSize.TotalAllocationUnits.LowPart)
297 {
298 TotalClusters = FileFsSize.TotalAllocationUnits.LowPart;
299 }
300
301 *lpTotalNumberOfClusters = TotalClusters;
302 }
303 }
304
305 return TRUE;
306}
307
308/*
309 * @implemented
310 */
311BOOL
312WINAPI
314 OUT PULARGE_INTEGER lpFreeBytesAvailableToCaller,
315 OUT PULARGE_INTEGER lpTotalNumberOfBytes,
316 OUT PULARGE_INTEGER lpTotalNumberOfFreeBytes)
317{
318 PCSTR RootPath;
319 PUNICODE_STRING RootPathU;
320
321 RootPath = lpDirectoryName;
322 if (RootPath == NULL)
323 {
324 RootPath = "\\";
325 }
326
327 RootPathU = Basep8BitStringToStaticUnicodeString(RootPath);
328 if (RootPathU == NULL)
329 {
330 return FALSE;
331 }
332
333 return GetDiskFreeSpaceExW(RootPathU->Buffer, lpFreeBytesAvailableToCaller,
334 lpTotalNumberOfBytes, lpTotalNumberOfFreeBytes);
335}
336
337/*
338 * @implemented
339 */
340BOOL
341WINAPI
343 OUT PULARGE_INTEGER lpFreeBytesAvailableToCaller,
344 OUT PULARGE_INTEGER lpTotalNumberOfBytes,
345 OUT PULARGE_INTEGER lpTotalNumberOfFreeBytes)
346{
347 PCWSTR RootPath;
349 HANDLE RootHandle;
351 DWORD BytesPerAllocationUnit;
354 FILE_FS_SIZE_INFORMATION FileFsSize;
355
356 /* If no path provided, get root path */
357 RootPath = lpDirectoryName;
358 if (lpDirectoryName == NULL)
359 {
360 RootPath = L"\\";
361 }
362
363 /* Convert the path to NT path */
365 {
367 return FALSE;
368 }
369
370 /* Open it for disk space query! */
376 if (!NT_SUCCESS(Status))
377 {
379 /* If error conversion lead to file not found, override to use path not found
380 * which is more accurate
381 */
383 {
385 }
386
387 RtlFreeHeap(RtlGetProcessHeap(), 0, FileName.Buffer);
388
389 return FALSE;
390 }
391
392 RtlFreeHeap(RtlGetProcessHeap(), 0, FileName.Buffer);
393
394 /* If user asks for lpTotalNumberOfFreeBytes, try to use full size information */
395 if (lpTotalNumberOfFreeBytes != NULL)
396 {
397 FILE_FS_FULL_SIZE_INFORMATION FileFsFullSize;
398
399 /* Issue the full fs size request */
400 Status = NtQueryVolumeInformationFile(RootHandle, &IoStatusBlock, &FileFsFullSize,
403 /* If it succeed, complete out buffers */
404 if (NT_SUCCESS(Status))
405 {
406 /* We can close here, we'll return */
407 NtClose(RootHandle);
408
409 /* Compute the size of an AU */
410 BytesPerAllocationUnit = FileFsFullSize.SectorsPerAllocationUnit * FileFsFullSize.BytesPerSector;
411
412 /* And then return what was asked */
413 if (lpFreeBytesAvailableToCaller != NULL)
414 {
415 lpFreeBytesAvailableToCaller->QuadPart = FileFsFullSize.CallerAvailableAllocationUnits.QuadPart * BytesPerAllocationUnit;
416 }
417
418 if (lpTotalNumberOfBytes != NULL)
419 {
420 lpTotalNumberOfBytes->QuadPart = FileFsFullSize.TotalAllocationUnits.QuadPart * BytesPerAllocationUnit;
421 }
422
423 /* No need to check for nullness ;-) */
424 lpTotalNumberOfFreeBytes->QuadPart = FileFsFullSize.ActualAvailableAllocationUnits.QuadPart * BytesPerAllocationUnit;
425
426 return TRUE;
427 }
428 }
429
430 /* Otherwise, fallback to normal size information */
432 &FileFsSize, sizeof(FILE_FS_SIZE_INFORMATION),
434 NtClose(RootHandle);
435 if (!NT_SUCCESS(Status))
436 {
438 return FALSE;
439 }
440
441 /* Compute the size of an AU */
442 BytesPerAllocationUnit = FileFsSize.SectorsPerAllocationUnit * FileFsSize.BytesPerSector;
443
444 /* And then return what was asked, available is free, the same! */
445 if (lpFreeBytesAvailableToCaller != NULL)
446 {
447 lpFreeBytesAvailableToCaller->QuadPart = FileFsSize.AvailableAllocationUnits.QuadPart * BytesPerAllocationUnit;
448 }
449
450 if (lpTotalNumberOfBytes != NULL)
451 {
452 lpTotalNumberOfBytes->QuadPart = FileFsSize.TotalAllocationUnits.QuadPart * BytesPerAllocationUnit;
453 }
454
455 if (lpTotalNumberOfFreeBytes != NULL)
456 {
457 lpTotalNumberOfFreeBytes->QuadPart = FileFsSize.AvailableAllocationUnits.QuadPart * BytesPerAllocationUnit;
458 }
459
460 return TRUE;
461}
462
463/*
464 * @implemented
465 */
466UINT
467WINAPI
468GetDriveTypeA(IN LPCSTR lpRootPathName)
469{
470 PWSTR RootPathU;
471
472 if (lpRootPathName != NULL)
473 {
474 PUNICODE_STRING RootPathUStr;
475
476 RootPathUStr = Basep8BitStringToStaticUnicodeString(lpRootPathName);
477 if (RootPathUStr == NULL)
478 {
479 return DRIVE_NO_ROOT_DIR;
480 }
481
482 RootPathU = RootPathUStr->Buffer;
483 }
484 else
485 {
486 RootPathU = NULL;
487 }
488
489 return GetDriveTypeW(RootPathU);
490}
491
492/*
493 * @implemented
494 */
495UINT
496WINAPI
497GetDriveTypeW(IN LPCWSTR lpRootPathName)
498{
499 BOOL RetryOpen;
500 PCWSTR RootPath;
502 WCHAR DriveLetter;
503 HANDLE RootHandle;
506 UNICODE_STRING PathName, VolumeString;
507 FILE_FS_DEVICE_INFORMATION FileFsDevice;
509
510 /* If no path, get one */
511 if (lpRootPathName == NULL)
512 {
513 RootPath = Buffer;
514 /* This will be current drive (<letter>:\ - drop the rest)*/
515 if (RtlGetCurrentDirectory_U(sizeof(Buffer), Buffer) > 3 * sizeof(WCHAR))
516 {
517 Buffer[3] = UNICODE_NULL;
518 }
519 }
520 else
521 {
522 /* Handle broken value */
523 if (lpRootPathName == (PVOID)-1)
524 {
525 return DRIVE_UNKNOWN;
526 }
527
528 RootPath = lpRootPathName;
529 /* If provided path is 2-len, it might be a drive letter... */
530 if (wcslen(lpRootPathName) == 2)
531 {
532 /* Check it! */
533 DriveLetter = RtlUpcaseUnicodeChar(lpRootPathName[0]);
534 /* That's a drive letter! */
535 if (DriveLetter >= L'A' && DriveLetter <= L'Z' && lpRootPathName[1] == L':')
536 {
537 /* Make it a volume */
538 Buffer[0] = DriveLetter;
539 Buffer[1] = L':';
540 Buffer[2] = L'\\';
541 Buffer[3] = UNICODE_NULL;
542 RootPath = Buffer;
543 }
544 }
545 }
546
547 /* If the provided looks like a DOS device... Like <letter>:<0> */
548 DriveLetter = RtlUpcaseUnicodeChar(RootPath[0]);
549 /* We'll take the quick path!
550 * We'll find the device type looking at the device map (and types ;-))
551 * associated with the current process
552 */
553 if (DriveLetter >= L'A' && DriveLetter <= L'Z' && RootPath[1] == L':' &&
554 RootPath[2] == L'\\' && RootPath[3] == UNICODE_NULL)
555 {
558
559 /* Query the device map */
562 &DeviceMap.Query,
563 sizeof(DeviceMap.Query),
564 NULL);
565 /* Zero output if we failed */
566 if (!NT_SUCCESS(Status))
567 {
568 RtlZeroMemory(&DeviceMap, sizeof(PROCESS_DEVICEMAP_INFORMATION));
569 }
570
571 /* Get our index in the device map */
572 Index = DriveLetter - L'A';
573 /* Check we're in the device map (bit set) */
574 if (((1 << Index) & DeviceMap.Query.DriveMap) != 0)
575 {
576 /* Validate device type and return it */
577 if (DeviceMap.Query.DriveType[Index] >= DRIVE_REMOVABLE &&
578 DeviceMap.Query.DriveType[Index] <= DRIVE_RAMDISK)
579 {
580 return DeviceMap.Query.DriveType[Index];
581 }
582 /* Otherwise, return we don't know the type */
583 else
584 {
585 return DRIVE_UNKNOWN;
586 }
587 }
588
589 /* We couldn't find ourselves, do it the slow way */
590 }
591
592 /* No path provided, use root */
593 if (lpRootPathName == NULL)
594 {
595 RootPath = L"\\";
596 }
597
598 /* Convert to NT path */
599 if (!RtlDosPathNameToNtPathName_U(RootPath, &PathName, NULL, NULL))
600 {
601 return DRIVE_NO_ROOT_DIR;
602 }
603
604 /* If not a directory, fail, we need a volume */
605 if (PathName.Buffer[(PathName.Length / sizeof(WCHAR)) - 1] != L'\\')
606 {
607 RtlFreeHeap(RtlGetProcessHeap(), 0, PathName.Buffer);
608 return DRIVE_NO_ROOT_DIR;
609 }
610
611 /* Let's probe for it, by forcing open failure! */
612 RetryOpen = TRUE;
619 /* It properly failed! */
621 {
622 /* It might be a mount point, then, query for target */
624 {
625 /* We'll reopen the target */
626 RtlInitUnicodeString(&VolumeString, VolumeName);
627 VolumeName[1] = L'?';
628 VolumeString.Length -= sizeof(WCHAR);
631 }
632 }
633 else
634 {
635 /* heh. It worked? Or failed for whatever other reason?
636 * Check we have a directory if we get farther in path
637 */
638 PathName.Length += sizeof(WCHAR);
639 if (IsThisARootDirectory(0, &PathName))
640 {
641 /* Yes? Heh, then it's fine, keep our current handle */
642 RetryOpen = FALSE;
643 }
644 else
645 {
646 /* Then, retry to open without forcing non directory type */
647 PathName.Length -= sizeof(WCHAR);
648 if (NT_SUCCESS(Status))
649 {
650 NtClose(RootHandle);
651 }
652 }
653 }
654
655 /* Now, we retry without forcing file type - should work now */
656 if (RetryOpen)
657 {
662 }
663
664 /* We don't need path any longer */
665 RtlFreeHeap(RtlGetProcessHeap(), 0, PathName.Buffer);
666 if (!NT_SUCCESS(Status))
667 {
668 return DRIVE_NO_ROOT_DIR;
669 }
670
671 /* Query the device for its type */
674 &FileFsDevice,
677 /* No longer required */
678 NtClose(RootHandle);
679 if (!NT_SUCCESS(Status))
680 {
681 return DRIVE_UNKNOWN;
682 }
683
684 /* Do we have a remote device? Return so! */
686 {
687 return DRIVE_REMOTE;
688 }
689
690 /* Check the device type */
691 switch (FileFsDevice.DeviceType)
692 {
693 /* CDROM, easy */
696 return DRIVE_CDROM;
697
698 /* Disk... */
699 case FILE_DEVICE_DISK:
701 /* Removable media? Floppy is one */
704 {
705 return DRIVE_REMOVABLE;
706 }
707 else
708 {
709 return DRIVE_FIXED;
710 }
711
712 /* Easy cases */
715 return DRIVE_REMOTE;
716
718 return DRIVE_RAMDISK;
719 }
720
721 /* Nothing matching, just fail */
722 return DRIVE_UNKNOWN;
723}
724
725/* EOF */
#define NtCurrentPeb()
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LONG NTSTATUS
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Definition: disk.c:468
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Definition: disk.c:342
#define MAX_DOS_DRIVES
Definition: disk.c:26
UINT WINAPI GetDriveTypeW(IN LPCWSTR lpRootPathName)
Definition: disk.c:497
BOOL WINAPI GetDiskFreeSpaceExA(IN LPCSTR lpDirectoryName OPTIONAL, OUT PULARGE_INTEGER lpFreeBytesAvailableToCaller, OUT PULARGE_INTEGER lpTotalNumberOfBytes, OUT PULARGE_INTEGER lpTotalNumberOfFreeBytes)
Definition: disk.c:313
DWORD WINAPI GetLogicalDriveStringsW(IN DWORD nBufferLength, IN LPWSTR lpBuffer)
Definition: disk.c:73
DWORD WINAPI GetLogicalDriveStringsA(IN DWORD nBufferLength, IN LPSTR lpBuffer)
Definition: disk.c:34
BOOL WINAPI GetDiskFreeSpaceW(IN LPCWSTR lpRootPathName, OUT LPDWORD lpSectorsPerCluster, OUT LPDWORD lpBytesPerSector, OUT LPDWORD lpNumberOfFreeClusters, OUT LPDWORD lpTotalNumberOfClusters)
Definition: disk.c:173
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Definition: disk.c:142
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struct _FileName FileName
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unsigned long DWORD
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_Must_inspect_result_ _Inout_opt_ PUNICODE_STRING VolumeName
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@ FileFsDeviceInformation
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@ FileFsSizeInformation
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Status
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GLfloat GLfloat p
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@ GetDiskFreeSpace2GB
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LARGE_INTEGER TotalAllocationUnits
Definition: from_kernel.h:263
LARGE_INTEGER AvailableAllocationUnits
Definition: from_kernel.h:264
struct _PROCESS_DEVICEMAP_INFORMATION::@4170::@4172 Query
uint16_t * PWSTR
Definition: typedefs.h:56
const uint16_t * PCWSTR
Definition: typedefs.h:57
uint32_t * LPDWORD
Definition: typedefs.h:59
const char * PCSTR
Definition: typedefs.h:52
#define RtlZeroMemory(Destination, Length)
Definition: typedefs.h:262
#define IN
Definition: typedefs.h:39
#define OUT
Definition: typedefs.h:40
#define STATUS_FILE_IS_A_DIRECTORY
Definition: udferr_usr.h:164
LONGLONG QuadPart
Definition: typedefs.h:114
ULONG LowPart
Definition: typedefs.h:106
_In_ WDFCOLLECTION _In_ ULONG Index
#define DRIVE_UNKNOWN
Definition: winbase.h:256
#define DRIVE_NO_ROOT_DIR
Definition: winbase.h:257
DWORD WINAPI GetLastError(void)
Definition: except.c:1042
#define DRIVE_REMOTE
Definition: winbase.h:253
DWORD WINAPI GetLogicalDrives(void)
Definition: disk.c:110
#define DRIVE_RAMDISK
Definition: winbase.h:255
#define DRIVE_FIXED
Definition: winbase.h:252
#define DRIVE_REMOVABLE
Definition: winbase.h:251
_In_ LPCSTR _In_opt_ LPCSTR _In_ DWORD nBufferLength
Definition: winbase.h:3073
#define WINAPI
Definition: msvc.h:6
#define ERROR_PATH_NOT_FOUND
Definition: winerror.h:106
const char * LPCSTR
Definition: xmlstorage.h:183
char * LPSTR
Definition: xmlstorage.h:182
unsigned char UCHAR
Definition: xmlstorage.h:181
__wchar_t WCHAR
Definition: xmlstorage.h:180
WCHAR * LPWSTR
Definition: xmlstorage.h:184
const WCHAR * LPCWSTR
Definition: xmlstorage.h:185