mirror of
https://github.com/reactos/reactos.git
synced 2024-07-07 13:15:07 +00:00
[NTDLL] Merge LdrpResolveFullName and LdrpSearchPath and LdrpAllocateUnicodeString from the LDR Rewrite branch. Not actually used yet since they use Rtl APIs that ReactOS does not implement. Guess what the next commits are going to be about.
svn path=/trunk/; revision=52622
This commit is contained in:
Alex Ionescu
parent
1b775b8d8a
commit
642d0d6141
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@ -20,6 +20,72 @@ BOOLEAN g_ShimsEnabled;
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/* FUNCTIONS *****************************************************************/
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NTSTATUS
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NTAPI
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LdrpAllocateUnicodeString(IN OUT PUNICODE_STRING StringOut,
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IN ULONG Length)
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{
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/* Sanity checks */
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ASSERT(StringOut);
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ASSERT(Length <= UNICODE_STRING_MAX_BYTES);
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/* Assume failure */
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StringOut->Length = 0;
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/* Make sure it's not mis-aligned */
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if (Length & 1)
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{
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/* Fail */
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StringOut->Buffer = NULL;
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StringOut->MaximumLength = 0;
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return STATUS_INVALID_PARAMETER;
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}
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/* Allocate the string*/
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StringOut->Buffer = RtlAllocateHeap(RtlGetProcessHeap(),
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0,
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StringOut->Length + sizeof(WCHAR));
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if (!StringOut->Buffer)
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{
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/* Fail */
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StringOut->MaximumLength = 0;
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return STATUS_NO_MEMORY;
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}
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/* Null-terminate it */
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StringOut->Buffer[StringOut->Length / sizeof(WCHAR)] = UNICODE_NULL;
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/* Check if this is a maximum-sized string */
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if (StringOut->Length != UNICODE_STRING_MAX_BYTES)
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{
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/* It's not, so set the maximum length to be one char more */
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StringOut->MaximumLength = StringOut->Length + sizeof(UNICODE_NULL);
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}
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else
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{
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/* The length is already the maximum possible */
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StringOut->MaximumLength = UNICODE_STRING_MAX_BYTES;
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}
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/* Return success */
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return STATUS_SUCCESS;
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}
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VOID
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NTAPI
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LdrpFreeUnicodeString(IN PUNICODE_STRING StringIn)
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{
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ASSERT(StringIn != NULL);
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/* If Buffer is not NULL - free it */
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if (StringIn->Buffer)
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{
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RtlFreeHeap(RtlGetProcessHeap(), 0, StringIn->Buffer);
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}
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/* Zero it out */
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RtlInitEmptyUnicodeString(StringIn, NULL, 0);
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}
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BOOLEAN
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NTAPI
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LdrpCallInitRoutine(IN PDLL_INIT_ROUTINE EntryPoint,
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@ -1394,6 +1460,314 @@ LdrpCheckForLoadedDllHandle(IN PVOID Base,
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return FALSE;
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}
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NTSTATUS
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NTAPI
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LdrpResolveFullName(IN PUNICODE_STRING OriginalName,
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IN PUNICODE_STRING PathName,
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IN PUNICODE_STRING FullPathName,
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IN PUNICODE_STRING *ExpandedName)
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{
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NTSTATUS Status = STATUS_SUCCESS;
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// RTL_PATH_TYPE PathType;
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// BOOLEAN InvalidName;
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ULONG Length;
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/* Display debug output if snaps are on */
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if (ShowSnaps)
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{
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DbgPrintEx(81, //DPFLTR_LDR_ID,
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0,
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"LDR: %s - Expanding full name of %wZ\n",
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__FUNCTION__,
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OriginalName);
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}
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/* FIXME: Lock the PEB */
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//RtlEnterCriticalSection(&FastPebLock);
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#if 0
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/* Get the path name */
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Length = RtlGetFullPathName_Ustr(OriginalName,
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PathName->Length,
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PathName->Buffer,
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NULL,
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&InvalidName,
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&PathType);
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#else
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Length = 0;
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#endif
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if (!(Length) || (Length > UNICODE_STRING_MAX_BYTES))
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{
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/* Fail */
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Status = STATUS_NAME_TOO_LONG;
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goto Quickie;
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}
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/* Check if the length hasn't changed */
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if (Length <= PathName->Length)
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{
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/* Return the same thing */
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*ExpandedName = PathName;
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PathName->Length = (USHORT)Length;
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goto Quickie;
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}
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/* Sanity check */
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ASSERT(Length >= sizeof(WCHAR));
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/* Allocate a string */
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Status = LdrpAllocateUnicodeString(FullPathName, Length - sizeof(WCHAR));
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if (!NT_SUCCESS(Status)) goto Quickie;
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/* Now get the full path again */
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#if 0
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Length = RtlGetFullPathName_Ustr(OriginalName,
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FullPathName->Length,
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FullPathName->Buffer,
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NULL,
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&InvalidName,
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&PathType);
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#else
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Length = 0;
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#endif
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if (!(Length) || (Length > FullPathName->Length))
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{
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/* Fail */
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LdrpFreeUnicodeString(FullPathName);
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Status = STATUS_NAME_TOO_LONG;
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}
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else
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{
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/* Return the expanded name */
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*ExpandedName = FullPathName;
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FullPathName->Length = (USHORT)Length;
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}
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Quickie:
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/* FIXME: Unlock the PEB */
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//RtlLeaveCriticalSection(&FastPebLock);
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/* Display debug output if snaps are on */
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if (ShowSnaps)
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{
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/* Check which output to use -- failure or success */
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if (NT_SUCCESS(Status))
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{
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DbgPrintEx(81, //DPFLTR_LDR_ID,
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0,
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"LDR: %s - Expanded to %wZ\n",
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__FUNCTION__,
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*ExpandedName);
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}
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else
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{
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DbgPrintEx(81, //DPFLTR_LDR_ID,
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0,
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"LDR: %s - Failed to expand %wZ; 0x%08x\n",
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__FUNCTION__,
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OriginalName,
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Status);
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}
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}
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/* If we failed, return NULL */
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if (!NT_SUCCESS(Status)) *ExpandedName = NULL;
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/* Return status */
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return Status;
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}
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NTSTATUS
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NTAPI
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LdrpSearchPath(IN PWCHAR *SearchPath,
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IN PWCHAR DllName,
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IN PUNICODE_STRING PathName,
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IN PUNICODE_STRING FullPathName,
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IN PUNICODE_STRING *ExpandedName)
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{
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BOOLEAN TryAgain = FALSE;
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PWCHAR ActualSearchPath = *SearchPath;
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UNICODE_STRING TestName;
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NTSTATUS Status;
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PWCHAR Buffer, BufEnd = NULL;
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ULONG Length = 0;
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WCHAR p;
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PWCHAR pp;
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/* Check if we don't have a search path */
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if (!ActualSearchPath) *SearchPath = LdrpDefaultPath.Buffer;
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/* Display debug output if snaps are on */
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if (ShowSnaps)
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{
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DbgPrintEx(81, //DPFLTR_LDR_ID,
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0,
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"LDR: %s - Looking for %ws in %ws\n",
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__FUNCTION__,
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DllName,
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*SearchPath);
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}
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/* Check if we're dealing with a relative path */
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if (RtlDetermineDosPathNameType_U(DllName) != RtlPathTypeRelative)
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{
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/* Good, we're not. Create the name string */
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Status = RtlInitUnicodeStringEx(&TestName, DllName);
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if (!NT_SUCCESS(Status)) goto Quickie;
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/* Make sure it exists */
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#if 0
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if (!RtlDoesFileExists_UstrEx(&TestName, TRUE))
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{
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/* It doesn't, fail */
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Status = STATUS_DLL_NOT_FOUND;
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goto Quickie;
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}
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#endif
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/* Resolve the full name */
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Status = LdrpResolveFullName(&TestName,
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PathName,
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FullPathName,
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ExpandedName);
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goto Quickie;
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}
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/* FIXME: Handle relative case semicolon-lookup here */
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/* Calculate length */
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Length += (ULONG)wcslen(DllName) + sizeof(UNICODE_NULL);
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if (Length > UNICODE_STRING_MAX_CHARS)
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{
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/* Too long, fail */
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Status = STATUS_NAME_TOO_LONG;
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goto Quickie;
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}
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/* Allocate buffer */
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Buffer = RtlAllocateHeap(RtlGetProcessHeap(), 0, Length * sizeof(WCHAR));
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if (!Buffer)
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{
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/* Fail */
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Status = STATUS_NO_MEMORY;
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goto Quickie;
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}
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/* FIXME: Setup TestName here */
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Status = STATUS_NOT_FOUND;
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/* Start loop */
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do
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{
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/* Get character */
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p = *ActualSearchPath;
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if (!(p) && (p == ';'))
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{
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/* FIXME: We don't have a character, or is a semicolon.*/
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/* Display debug output if snaps are on */
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if (ShowSnaps)
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{
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DbgPrintEx(81, //DPFLTR_LDR_ID,
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0,
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"LDR: %s - Looking for %ws\n",
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__FUNCTION__,
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Buffer);
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}
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/* Sanity check */
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TestName.Length = (USHORT)ALIGN_DOWN((BufEnd - Buffer), WCHAR);
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ASSERT(TestName.Length < TestName.MaximumLength);
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/* Check if the file exists */
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#if 0
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if (RtlDoesFileExists_UstrEx(&TestName, FALSE))
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#endif
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{
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/* It does. Reallocate the buffer */
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TestName.MaximumLength = (USHORT)ALIGN_DOWN((BufEnd - Buffer), WCHAR) + sizeof(WCHAR);
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TestName.Buffer = RtlReAllocateHeap(RtlGetProcessHeap(),
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0,
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Buffer,
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TestName.MaximumLength);
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if (!TestName.Buffer)
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{
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/* Keep the old one */
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TestName.Buffer = Buffer;
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}
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else
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{
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/* Update buffer */
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Buffer = TestName.Buffer;
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}
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/* Make sure we have a buffer at least */
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ASSERT(TestName.Buffer);
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/* Resolve the name */
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*SearchPath = ActualSearchPath++;
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Status = LdrpResolveFullName(&TestName,
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PathName,
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FullPathName,
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ExpandedName);
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break;
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}
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/* Update buffer end */
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BufEnd = Buffer;
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/* Update string position */
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pp = ActualSearchPath++;
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}
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else
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{
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/* Otherwise, write the character */
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*BufEnd = p;
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BufEnd++;
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}
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/* Check if the string is empty, meaning we're done */
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if (!(*ActualSearchPath)) TryAgain = TRUE;
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/* Advance in the string */
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ActualSearchPath++;
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} while (!TryAgain);
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/* Check if we had a buffer and free it */
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if (Buffer) RtlFreeHeap(RtlGetProcessHeap(), 0, Buffer);
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Quickie:
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/* Check if we got here through failure */
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if (!NT_SUCCESS(Status)) *ExpandedName = NULL;
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/* Display debug output if snaps are on */
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if (ShowSnaps)
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{
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/* Check which output to use -- failure or success */
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if (NT_SUCCESS(Status))
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{
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DbgPrintEx(81, //DPFLTR_LDR_ID,
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0,
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"LDR: %s - Returning %wZ\n",
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__FUNCTION__,
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*ExpandedName);
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}
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else
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{
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DbgPrintEx(81, //DPFLTR_LDR_ID,
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0,
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"LDR: %s - Unable to locate %ws in %ws: 0x%08x\n",
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__FUNCTION__,
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DllName,
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ActualSearchPath,
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Status);
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}
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}
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/* Return status */
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return Status;
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}
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/* NOTE: This function is b0rked and in the process of being slowly unf*cked */
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BOOLEAN
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NTAPI
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@ -2122,20 +2496,4 @@ LdrpClearLoadInProgress(VOID)
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return ModulesCount;
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}
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VOID
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NTAPI
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LdrpFreeUnicodeString(IN PUNICODE_STRING StringIn)
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{
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ASSERT(StringIn != NULL);
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/* If Buffer is not NULL - free it */
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if (StringIn->Buffer)
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{
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RtlFreeHeap(RtlGetProcessHeap(), 0, StringIn->Buffer);
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}
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/* Zero it out */
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RtlInitEmptyUnicodeString(StringIn, NULL, 0);
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}
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/* EOF */
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