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[NTDLL]: Reimplement RtlGetCurrentDirectory_U... I couldn't even understand what the old version was doing. This one is at least commented and makes more sense.

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svn path=/trunk/; revision=52625
This commit is contained in:
Alex Ionescu 2011-07-11 01:13:34 +00:00
parent 67f44266b0
commit 043ba4e228
1 changed files with 57 additions and 31 deletions
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88
reactos/lib/rtl/path.c
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@ -159,50 +159,76 @@ RtlIsDosDeviceName_U(PWSTR dos_name)
return 0;
}
/*
* @implemented
*/
ULONG NTAPI
RtlGetCurrentDirectory_U(ULONG MaximumLength,
PWSTR Buffer)
ULONG
NTAPI
RtlGetCurrentDirectory_U(IN ULONG MaximumLength,
IN PWSTR Buffer)
{
ULONG Length;
PCURDIR cd;
ULONG Length;
PCURDIR CurDir;
PWSTR CurDirName;
DPRINT("RtlGetCurrentDirectory %lu %p\n", MaximumLength, Buffer);
DPRINT ("RtlGetCurrentDirectory %lu %p\n", MaximumLength, Buffer);
/* Lock the PEB to get the current directory */
RtlAcquirePebLock();
CurDir = &NtCurrentPeb()->ProcessParameters->CurrentDirectory;
RtlAcquirePebLock();
/* Get the buffer and character length */
CurDirName = CurDir->DosPath.Buffer;
Length = CurDir->DosPath.Length / sizeof(WCHAR);
ASSERT((CurDirName != NULL) && (Length > 0));
cd = (PCURDIR)&(NtCurrentPeb ()->ProcessParameters->CurrentDirectory.DosPath);
Length = cd->DosPath.Length / sizeof(WCHAR);
if (cd->DosPath.Buffer[Length - 1] == L'\\' &&
cd->DosPath.Buffer[Length - 2] != L':')
Length--;
/* Check for x:\ vs x:\path\foo (note the trailing slash) */
Bytes = Length * sizeof(WCHAR);
if ((Length <= 1) || (CurDirName[Length - 2] == ":"))
{
/* Check if caller does not have enough space */
if (MaximumLength <= Bytes)
{
/* Call has no space for it, fail, add the trailing slash */
RtlReleasePebLock();
return Bytes + sizeof(L'\\');
}
}
else
{
/* Check if caller does not have enough space */
if (MaximumLength <= Bytes)
{
/* Call has no space for it, fail */
RtlReleasePebLock();
return Bytes;
}
}
DPRINT ("cd->DosPath.Buffer %S Length %lu\n",
cd->DosPath.Buffer, Length);
/* Copy the buffer since we seem to have space */
RtlCopyMemory(Buffer, CurDirName, Bytes);
if (MaximumLength / sizeof(WCHAR) > Length)
{
memcpy (Buffer,
cd->DosPath.Buffer,
Length * sizeof(WCHAR));
Buffer[Length] = 0;
}
else
{
Length++;
}
/* The buffer should end with a path separator */
ASSERT(Buffer[Length - 1] == L'\\');
RtlReleasePebLock ();
/* Again check for our two cases (drive root vs path) */
if ((Length <= 1) || (Buffer[Length - 2] != ":"))
{
/* Replace the trailing slash with a null */
Buffer[Length - 1] = UNICODE_NULL;
--Length;
}
else
{
/* Append the null char since there's no trailing slash */
Buffer[Length] = UNICODE_NULL;
}
DPRINT ("CurrentDirectory %S\n", Buffer);
return (Length * sizeof(WCHAR));
/* Release PEB lock */
RtlReleasePebLock();
DPRINT("CurrentDirectory %S\n", Buffer);
return Length * sizeof(WCHAR);
}
/*
* @implemented
*/