[ion] 54322: [KERNEL32]: Give the same treatement to SearchPathA. Also add a comment on why exactly the A<->W conversion has to be more complex than what Wine was attempting.
6 Nov
2011
6 Nov
'11
10:46 p.m.
Author: ion
Date: Sun Nov 6 22:46:31 2011
New Revision: 54322
URL: http://svn.reactos.org/svn/reactos?rev=54322&view=rev
Log:
[KERNEL32]: Give the same treatement to SearchPathA. Also add a comment on why exactly the
A<->W conversion has to be more complex than what Wine was attempting.
Modified:
trunk/reactos/dll/win32/kernel32/client/path.c
Modified: trunk/reactos/dll/win32/kernel32/client/path.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/client/…
==============================================================================
--- trunk/reactos/dll/win32/kernel32/client/path.c [iso-8859-1] (original)
+++ trunk/reactos/dll/win32/kernel32/client/path.c [iso-8859-1] Sun Nov 6 22:46:31 2011
@@ -28,7 +28,7 @@
0x10000000 // 7C not allowed
};
-/* FUNCTIONS ******************************************************************/
+/* PRIVATE FUNCTIONS **********************************************************/
/*
* Why not use RtlIsNameLegalDOS8Dot3? In fact the actual algorithm body is
@@ -267,6 +267,8 @@
return !NT_SUCCESS(Status) && Status != STATUS_BUFFER_TOO_SMALL;
}
+/* PUBLIC FUNCTIONS ***********************************************************/
+
/*
* @implemented
*/
@@ -450,6 +452,18 @@
/*
* @implemented
+ *
+ * NOTE: Many of these A functions may seem to do rather complex A<->W mapping
+ * beyond what you would usually expect. There are two main reasons:
+ *
+ * First, these APIs are subject to the ANSI/OEM File API selection status that
+ * the caller has chosen, so we must use the "8BitString" internal Base APIs.
+ *
+ * Secondly, the Wide APIs (coming from the 9x world) are coded to return the
+ * length of the paths in "ANSI" by dividing their internal Wide character
count
+ * by two... this is usually correct when dealing with pure-ASCII codepages but
+ * not necessarily when dealing with MBCS pre-Unicode sets, which NT supports
+ * for CJK, for example.
*/
DWORD
WINAPI
@@ -545,7 +559,7 @@
/* Conversion worked, now copy the ANSI/OEM buffer into the buffer */
RtlCopyMemory(lpBuffer, AnsiString.Buffer, PathSize + 1);
RtlFreeAnsiString(&AnsiString);
-
+
/* And finally, did the caller request file part information? */
if (lpFilePart)
{
@@ -583,149 +597,175 @@
*/
DWORD
WINAPI
-SearchPathA (
- LPCSTR lpPath,
- LPCSTR lpFileName,
- LPCSTR lpExtension,
- DWORD nBufferLength,
- LPSTR lpBuffer,
- LPSTR *lpFilePart
- )
-{
- UNICODE_STRING PathU = { 0, 0, NULL };
- UNICODE_STRING FileNameU = { 0, 0, NULL };
- UNICODE_STRING ExtensionU = { 0, 0, NULL };
- UNICODE_STRING BufferU = { 0, 0, NULL };
- ANSI_STRING Path;
- ANSI_STRING FileName;
- ANSI_STRING Extension;
- ANSI_STRING Buffer;
- PWCHAR FilePartW;
- DWORD RetValue = 0;
- NTSTATUS Status = STATUS_SUCCESS;
-
- if (!lpFileName)
- {
- SetLastError(ERROR_INVALID_PARAMETER);
- return 0;
- }
-
- RtlInitAnsiString (&Path,
- (LPSTR)lpPath);
- RtlInitAnsiString (&FileName,
- (LPSTR)lpFileName);
- RtlInitAnsiString (&Extension,
- (LPSTR)lpExtension);
-
- /* convert ansi (or oem) strings to unicode */
- if (bIsFileApiAnsi)
- {
- Status = RtlAnsiStringToUnicodeString (&PathU,
- &Path,
- TRUE);
+SearchPathA(IN LPCSTR lpPath,
+ IN LPCSTR lpFileName,
+ IN LPCSTR lpExtension,
+ IN DWORD nBufferLength,
+ IN LPSTR lpBuffer,
+ OUT LPSTR *lpFilePart)
+{
+ PUNICODE_STRING FileNameString;
+ UNICODE_STRING PathString, ExtensionString;
+ NTSTATUS Status;
+ ULONG PathSize, FilePartSize, AnsiLength;
+ PWCHAR LocalFilePart, Buffer;
+ PWCHAR* FilePart;
+
+ /* If the caller wants filepart, use a local wide buffer since this is A */
+ FilePart = lpFilePart != NULL ? &LocalFilePart : NULL;
+
+ /* Initialize stuff for Quickie */
+ PathSize = 0;
+ Buffer = NULL;
+ ExtensionString.Buffer = PathString.Buffer = NULL;
+
+ /* Get the UNICODE_STRING file name */
+ FileNameString = Basep8BitStringToStaticUnicodeString(lpFileName);
+ if (!FileNameString) return 0;
+
+ /* Did the caller specify an extension */
+ if (lpExtension)
+ {
+ /* Yup, convert it into UNICODE_STRING */
+ Status = Basep8BitStringToDynamicUnicodeString(&ExtensionString,
+ lpExtension);
+ if (!NT_SUCCESS(Status)) goto Quickie;
+ }
+
+ /* Did the caller specify a path */
+ if (lpPath)
+ {
+ /* Yup, convert it into UNICODE_STRING */
+ Status = Basep8BitStringToDynamicUnicodeString(&PathString, lpPath);
+ if (!NT_SUCCESS(Status)) goto Quickie;
+ }
+
+ /* Allocate our output buffer */
+ Buffer = RtlAllocateHeap(RtlGetProcessHeap(), 0, nBufferLength * sizeof(WCHAR));
+ if (!Buffer)
+ {
+ /* It failed, bail out */
+ BaseSetLastNTError(STATUS_NO_MEMORY);
+ goto Quickie;
+ }
+
+ /* Now run the Wide search with the input buffer lengths */
+ PathSize = SearchPathW(PathString.Buffer,
+ FileNameString->Buffer,
+ ExtensionString.Buffer,
+ nBufferLength,
+ Buffer,
+ FilePart);
+ if (PathSize <= nBufferLength)
+ {
+ /* It fits, but is it empty? If so, bail out */
+ if (!PathSize) goto Quickie;
+
+ /* The length above is inexact, we need it in ANSI */
+ Status = RtlUnicodeToMultiByteSize(&AnsiLength, Buffer, PathSize *
sizeof(WCHAR));
+ if (!NT_SUCCESS(Status))
+ {
+ /* Conversion failed, fail the call */
+ PathSize = 0;
+ BaseSetLastNTError(Status);
+ goto Quickie;
+ }
+
+ /* If the correct ANSI size is too big, return requird length plus a NULL */
+ if (AnsiLength >= nBufferLength)
+ {
+ PathSize = AnsiLength + 1;
+ goto Quickie;
+ }
+
+ /* Now apply the final conversion to ANSI */
+ Status = RtlUnicodeToMultiByteN(lpBuffer,
+ nBufferLength - 1,
+ &AnsiLength,
+ Buffer,
+ PathSize * sizeof(WCHAR));
+ if (!NT_SUCCESS(Status))
+ {
+ /* Conversion failed, fail the whole call */
+ PathSize = 0;
+ BaseSetLastNTError(STATUS_NO_MEMORY);
+ goto Quickie;
+ }
+
+ /* NULL-terminate and return the real ANSI length */
+ lpBuffer[AnsiLength] = ANSI_NULL;
+ PathSize = AnsiLength;
+
+ /* Now check if the user wanted file part size as well */
+ if (lpFilePart)
+ {
+ /* If we didn't get a file part, clear the caller's */
+ if (!LocalFilePart)
+ {
+ *lpFilePart = NULL;
+ }
+ else
+ {
+ /* Yep, so in this case get the length of the file part too */
+ Status = RtlUnicodeToMultiByteSize(&FilePartSize,
+ Buffer,
+ (LocalFilePart - Buffer) *
+ sizeof(WCHAR));
if (!NT_SUCCESS(Status))
- goto Cleanup;
-
- Status = RtlAnsiStringToUnicodeString (&FileNameU,
- &FileName,
- TRUE);
- if (!NT_SUCCESS(Status))
- goto Cleanup;
-
- Status = RtlAnsiStringToUnicodeString (&ExtensionU,
- &Extension,
- TRUE);
- if (!NT_SUCCESS(Status))
- goto Cleanup;
+ {
+ /* We failed to do that, so fail the whole call */
+ BaseSetLastNTError(Status);
+ PathSize = 0;
+ }
+
+ /* Return the file part buffer */
+ *lpFilePart = lpBuffer + FilePartSize;
+ }
+ }
+ }
+ else
+ {
+ /* Our initial buffer guess was too small, allocate a bigger one */
+ RtlFreeHeap(RtlGetProcessHeap(), 0, Buffer);
+ Buffer = RtlAllocateHeap(RtlGetProcessHeap(), 0, PathSize * sizeof(WCHAR));
+ if (!Buffer)
+ {
+ /* Out of memory, fail everything */
+ BaseSetLastNTError(STATUS_NO_MEMORY);
+ goto Quickie;
+ }
+
+ /* Do the search again -- it will fail, we just want the path size */
+ PathSize = SearchPathW(PathString.Buffer,
+ FileNameString->Buffer,
+ ExtensionString.Buffer,
+ PathSize,
+ Buffer,
+ FilePart);
+ if (!PathSize) goto Quickie;
+
+ /* Convert it to a correct size */
+ Status = RtlUnicodeToMultiByteSize(&PathSize, Buffer, PathSize *
sizeof(WCHAR));
+ if (NT_SUCCESS(Status))
+ {
+ /* Make space for the NULL-char */
+ PathSize++;
}
else
{
- Status = RtlOemStringToUnicodeString (&PathU,
- &Path,
- TRUE);
- if (!NT_SUCCESS(Status))
- goto Cleanup;
- Status = RtlOemStringToUnicodeString (&FileNameU,
- &FileName,
- TRUE);
- if (!NT_SUCCESS(Status))
- goto Cleanup;
-
- Status = RtlOemStringToUnicodeString (&ExtensionU,
- &Extension,
- TRUE);
- if (!NT_SUCCESS(Status))
- goto Cleanup;
- }
-
- BufferU.MaximumLength = min(nBufferLength * sizeof(WCHAR), USHRT_MAX);
- BufferU.Buffer = RtlAllocateHeap (RtlGetProcessHeap (),
- 0,
- BufferU.MaximumLength);
- if (BufferU.Buffer == NULL)
- {
- Status = STATUS_NO_MEMORY;
- goto Cleanup;
- }
-
- Buffer.MaximumLength = min(nBufferLength, USHRT_MAX);
- Buffer.Buffer = lpBuffer;
-
- RetValue = SearchPathW (NULL == lpPath ? NULL : PathU.Buffer,
- NULL == lpFileName ? NULL : FileNameU.Buffer,
- NULL == lpExtension ? NULL : ExtensionU.Buffer,
- nBufferLength,
- BufferU.Buffer,
- &FilePartW);
-
- if (0 != RetValue)
- {
- BufferU.Length = wcslen(BufferU.Buffer) * sizeof(WCHAR);
- /* convert ansi (or oem) string to unicode */
- if (bIsFileApiAnsi)
- Status = RtlUnicodeStringToAnsiString(&Buffer,
- &BufferU,
- FALSE);
- else
- Status = RtlUnicodeStringToOemString(&Buffer,
- &BufferU,
- FALSE);
-
- if (NT_SUCCESS(Status) && Buffer.Buffer)
- {
- /* nul-terminate ascii string */
- Buffer.Buffer[BufferU.Length / sizeof(WCHAR)] = '\0';
-
- if (NULL != lpFilePart && BufferU.Length != 0)
- {
- *lpFilePart = strrchr (lpBuffer, '\\') + 1;
- }
- }
- }
-
-Cleanup:
- RtlFreeHeap (RtlGetProcessHeap (),
- 0,
- PathU.Buffer);
- RtlFreeHeap (RtlGetProcessHeap (),
- 0,
- FileNameU.Buffer);
- RtlFreeHeap (RtlGetProcessHeap (),
- 0,
- ExtensionU.Buffer);
- RtlFreeHeap (RtlGetProcessHeap (),
- 0,
- BufferU.Buffer);
-
- if (!NT_SUCCESS(Status))
- {
+ /* Conversion failed for some reason, fail the call */
BaseSetLastNTError(Status);
- return 0;
- }
-
- return RetValue;
-}
-
+ PathSize = 0;
+ }
+ }
+
+Quickie:
+ /* Cleanup/complete path */
+ if (Buffer) RtlFreeHeap(RtlGetProcessHeap(), 0, Buffer);
+ if (ExtensionString.Buffer) RtlFreeUnicodeString(&ExtensionString);
+ if (PathString.Buffer) RtlFreeUnicodeString(&PathString);
+ return PathSize;
+}
/***********************************************************************
* ContainsPath (Wine name: contains_pathW)
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