[dchapyshev] 72668: [RTL] - Use correct checks for illegal chars - Build context and 8.3 name on the basis of it (context can be already presented) * Fixes 34 tests for ntdll:RtlGenerate8dot3Name (...

Author: dchapyshev
Date: Wed Sep 14 00:31:30 2016
New Revision: 72668

URL: http://svn.reactos.org/svn/reactos?rev=72668&view=rev
Log:
[RTL]
- Use correct checks for illegal chars
- Build context and 8.3 name on the basis of it (context can be already presented)

* Fixes 34 tests for ntdll:RtlGenerate8dot3Name (remained 16 tests will be fixed after
correction of a problem with NLS files)

Modified:
    trunk/reactos/sdk/lib/rtl/dos8dot3.c

Modified: trunk/reactos/sdk/lib/rtl/dos8dot3.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/sdk/lib/rtl/dos8dot3.c?rev…
==============================================================================
--- trunk/reactos/sdk/lib/rtl/dos8dot3.c	[iso-8859-1] (original)
+++ trunk/reactos/sdk/lib/rtl/dos8dot3.c	[iso-8859-1] Wed Sep 14 00:31:30 2016
@@ -13,80 +13,65 @@
 #define NDEBUG
 #include <debug.h>
 
+extern PUSHORT NlsUnicodeToMbOemTable;
 
 /* CONSTANTS *****************************************************************/
 
-const PCHAR RtlpShortIllegals = ";+=[],\"*\\<>/?:|";
-
+const ULONG RtlpShortIllegals[] = { 0xFFFFFFFF, 0xFC009C04, 0x38000000, 0x10000000 };
 
 /* FUNCTIONS *****************************************************************/
 
+BOOLEAN
+NTAPI
+RtlIsValidOemCharacter(IN PWCHAR Char);
+
 static BOOLEAN
-RtlpIsShortIllegal(CHAR Char)
+RtlpIsShortIllegal(const WCHAR Char)
 {
-    return strchr(RtlpShortIllegals, Char) ? TRUE : FALSE;
+    return (Char < 128 && (RtlpShortIllegals[Char / 32] & (1 <<
(Char % 32))));
 }
 
 static USHORT
 RtlpGetCheckSum(PUNICODE_STRING Name)
 {
-    USHORT Hash, Saved;
-    WCHAR* CurChar;
-    USHORT Len;
-
-    if (Name->Length == 0)
-    {
+    PWCHAR CurrentChar;
+    USHORT Hash;
+    USHORT Saved;
+    USHORT Length;
+
+    if (!Name->Length)
         return 0;
-    }
 
     if (Name->Length == sizeof(WCHAR))
-    {
         return Name->Buffer[0];
-    }
-
-    CurChar = Name->Buffer;
-    Hash = (*CurChar << 8) + *(CurChar + 1);
+
+    CurrentChar = Name->Buffer;
+    Hash = (*CurrentChar << 8) + *(CurrentChar + 1);
 
     if (Name->Length == 2 * sizeof(WCHAR))
-    {
         return Hash;
-    }
 
     Saved = Hash;
-    Len = 2;
+    Length = 2;
 
     do
     {
-        CurChar = CurChar + 2;
-        Hash = (Hash << 7) + *CurChar;
+        CurrentChar += 2;
+        Hash = (Hash << 7) + *CurrentChar;
         Hash = (Saved >> 1) + (Hash << 8);
 
-        if (Len + 1 < Name->Length / sizeof(WCHAR))
-        {
-            Hash += *(CurChar + 1);
+        if (Length + 1 < Name->Length / sizeof(WCHAR))
+        {
+            Hash += *(CurrentChar + 1);
         }
 
         Saved = Hash;
-        Len += 2;
-    } while (Len < Name->Length / sizeof(WCHAR));
+        Length += 2;
+    }
+    while (Length < Name->Length / sizeof(WCHAR));
 
     return Hash;
 }
-
-static ULONG
-RtlpGetIndexLength(ULONG Index)
-{
-    ULONG Length = 0;
-
-    while (Index)
-    {
-        Index /= 10;
-        Length++;
-    }
-
-    return Length ? Length : 1;
-}
-
 
 /*
  * @implemented
@@ -98,205 +83,146 @@
                      IN OUT PGENERATE_NAME_CONTEXT Context,
                      OUT PUNICODE_STRING Name8dot3)
 {
-    ULONG Count;
-    WCHAR NameBuffer[8];
-    WCHAR ExtBuffer[4];
-    ULONG StrLength;
-    ULONG NameLength;
-    ULONG ExtLength;
-    ULONG CopyLength;
+    ULONG Length = Name->Length / sizeof(WCHAR);
+    ULONG IndexLength;
+    ULONG Index;
     ULONG DotPos;
-    ULONG i, j;
-    ULONG IndexLength;
-    ULONG CurrentIndex;
+    WCHAR IndexBuffer[8];
+    WCHAR Char;
     USHORT Checksum;
-    WCHAR c;
-
-    StrLength = Name->Length / sizeof(WCHAR);
-
-    DPRINT("StrLength: %lu\n", StrLength);
-
-    /* Find last dot in Name */
-    DotPos = StrLength;
-    for (i = 0; i < StrLength; i++)
-    {
-        if (Name->Buffer[i] == L'.')
-        {
-            DotPos = i;
-        }
-    }
-
-    DPRINT("DotPos: %lu\n", DotPos);
-
-    /* Copy name (6 valid characters max) */
-    for (i = 0, NameLength = 0; NameLength < 6 && i < DotPos; i++)
-    {
-        c = UNICODE_NULL;
-        if (AllowExtendedCharacters)
-        {
-            c = RtlUpcaseUnicodeChar(Name->Buffer[i]);
-            Count = 1;
-        }
-        else
-        {
-            RtlUpcaseUnicodeToOemN((CHAR *)&c, sizeof(CHAR), &Count,
&Name->Buffer[i], sizeof(WCHAR));
-        }
-
-        if (Count != 1 || c == UNICODE_NULL || RtlpIsShortIllegal(c))
-        {
-            NameBuffer[NameLength++] = L'_';
-        }
-        else if (c != L'.' && c != L' ')
-        {
-            if (isgraph(c) || (AllowExtendedCharacters && iswgraph(c)))
+
+    if (!Context->NameLength)
+    {
+        DotPos = Length;
+
+        /* Find last dot in Name */
+        for (Index = 0; Index < Length; Index++)
+        {
+            if (Name->Buffer[Index] == L'.')
+                DotPos = Index;
+        }
+
+        /* Copy name (6 valid characters max) */
+        for (Index = 0; Index < DotPos && Context->NameLength < 6;
Index++)
+        {
+            Char = Name->Buffer[Index];
+
+            if ((Char > L' ') && (Char != L'.') &&
+                ((Char < 127) || (AllowExtendedCharacters &&
RtlIsValidOemCharacter(&Char))))
             {
-                NameBuffer[NameLength++] = c;
+                if (RtlpIsShortIllegal(Char))
+                    Char = L'_';
+                else if (Char >= L'a' && Char <= L'z')
+                    Char = RtlUpcaseUnicodeChar(Char);
+
+                Context->NameBuffer[Context->NameLength] = Char;
+                ++Context->NameLength;
             }
         }
-    }
-
-    DPRINT("NameBuffer: '%.08S'\n", NameBuffer);
-    DPRINT("NameLength: %lu\n", NameLength);
-
-    /* Copy extension (4 valid characters max) */
-    if (DotPos < StrLength)
-    {
-        for (i = DotPos, ExtLength = 0; ExtLength < 4 && i < StrLength;
i++)
-        {
-            c = UNICODE_NULL;
-
-            if (AllowExtendedCharacters)
+
+        /* Copy extension (4 valid characters max) */
+        Context->ExtensionLength = 0;
+        if (DotPos < Length)
+        {
+            Context->ExtensionBuffer[0] = L'.';
+            Context->ExtensionLength = 1;
+
+            while (DotPos < Length && Context->ExtensionLength < 4)
             {
-                c = RtlUpcaseUnicodeChar(Name->Buffer[i]);
-                Count = 1;
+                Char = Name->Buffer[DotPos];
+
+                if ((Char > L' ') && (Char != L'.')
&&
+                    ((Char < 127) || (AllowExtendedCharacters &&
RtlIsValidOemCharacter(&Char))))
+                {
+                    if (RtlpIsShortIllegal(Char))
+                        Char = L'_';
+                    else if (Char >= L'a' && Char <= L'z')
+                        Char = RtlUpcaseUnicodeChar(Char);
+
+                    Context->ExtensionBuffer[Context->ExtensionLength++] = Char;
+                }
+
+                Char = UNICODE_NULL;
+                ++DotPos;
             }
-            else
+
+            if (Char != UNICODE_NULL)
+                Context->ExtensionBuffer[Context->ExtensionLength - 1] =
L'~';
+        }
+
+        if (Context->NameLength <= 2)
+        {
+            Checksum = Context->Checksum = RtlpGetCheckSum(Name);
+
+            for (Index = 0; Index < 4; Index++)
             {
-                RtlUpcaseUnicodeToOemN((CHAR *)&c, sizeof(CHAR), &Count,
&Name->Buffer[i], sizeof(WCHAR));
+                Context->NameBuffer[Context->NameLength + Index] =
+                    (Checksum & 0xF) > 9 ? (Checksum & 0xF) + L'A' -
10 : (Checksum & 0xF) + L'0';
+                Checksum >>= 4;
             }
 
-            if (Count != 1 || c == UNICODE_NULL || RtlpIsShortIllegal(c))
-            {
-                ExtBuffer[ExtLength++] = L'_';
-            }
-            else if (c != L' ')
-            {
-                if (isgraph(c) || c == L'.' || (AllowExtendedCharacters
&& iswgraph(c)))
-                {
-                    ExtBuffer[ExtLength++] = c;
-                }
-            }
-        }
-    }
-    else
-    {
-        ExtLength = 0;
-    }
-
-    DPRINT("ExtBuffer: '%.04S'\n", ExtBuffer);
-    DPRINT("ExtLength: %lu\n", ExtLength);
-
-    /* Determine next index */
-    IndexLength = RtlpGetIndexLength(Context->LastIndexValue);
-    if (Context->CheckSumInserted)
-    {
-        CopyLength = min(NameLength, 8 - 4 - 1 - IndexLength);
-        Checksum = RtlpGetCheckSum(Name);
-    }
-    else
-    {
-        CopyLength = min(NameLength, 8 - 1 - IndexLength);
-        Checksum = 0;
-    }
-
-    DPRINT("CopyLength: %lu\n", CopyLength);
-
-    if ((Context->NameLength == CopyLength) &&
-        (wcsncmp(Context->NameBuffer, NameBuffer, CopyLength) == 0) &&
-        (Context->ExtensionLength == ExtLength) &&
-        (wcsncmp(Context->ExtensionBuffer, ExtBuffer, ExtLength) == 0) &&
-        (Checksum == Context->Checksum) &&
-        (Context->LastIndexValue < 999))
-    {
-        Context->LastIndexValue++;
-
-        if (Context->CheckSumInserted == FALSE &&
-            Context->LastIndexValue > 9)
-        {
             Context->CheckSumInserted = TRUE;
-            Context->LastIndexValue = 1;
-            Context->Checksum = RtlpGetCheckSum(Name);
-        }
-    }
-    else
-    {
+            Context->NameLength += 4;
+        }
+    }
+
+    ++Context->LastIndexValue;
+
+    if (Context->LastIndexValue > 4 && !Context->CheckSumInserted)
+    {
+        Checksum = Context->Checksum = RtlpGetCheckSum(Name);
+
+        for (Index = 2; Index < 6; Index++)
+        {
+            Context->NameBuffer[Index] =
+                (Checksum & 0xF) > 9 ? (Checksum & 0xF) + L'A' - 10 :
(Checksum & 0xF) + L'0';
+            Checksum >>= 4;
+        }
+
+        Context->CheckSumInserted = TRUE;
+        Context->NameLength = 6;
         Context->LastIndexValue = 1;
-
-        if (NameLength == 0)
-        {
-            Context->CheckSumInserted = TRUE;
-            Context->Checksum = RtlpGetCheckSum(Name);
-        }
-        else
-        {
-            Context->CheckSumInserted = FALSE;
-        }
-    }
-
-    IndexLength = RtlpGetIndexLength(Context->LastIndexValue);
-
-    DPRINT("CurrentIndex: %lu, IndexLength %lu\n", Context->LastIndexValue,
IndexLength);
-
-    if (Context->CheckSumInserted)
-    {
-        CopyLength = min(NameLength, 8 - 4 - 1 - IndexLength);
-    }
-    else
-    {
-        CopyLength = min(NameLength, 8 - 1 - IndexLength);
-    }
-
-    /* Build the short name */
-    memcpy(Name8dot3->Buffer, NameBuffer, CopyLength * sizeof(WCHAR));
-
-    j = CopyLength;
-
-    if (Context->CheckSumInserted)
-    {
-        Checksum = Context->Checksum;
-
-        for (i = 0; i < 4; i++)
-        {
-            Name8dot3->Buffer[j++] = (Checksum & 0xF) > 9 ? (Checksum &
0xF) + L'A' - 10 : (Checksum & 0xF) + L'0';
-            Checksum >>= 4;
-        }
-
-        j = CopyLength + 4;
-    }
-
-    Name8dot3->Buffer[j++] = L'~';
-    j += IndexLength - 1;
-    CurrentIndex = Context->LastIndexValue;
-
-    for (i = 0; i < IndexLength; i++)
-    {
-        Name8dot3->Buffer[j--] = (CurrentIndex % 10) + L'0';
-        CurrentIndex /= 10;
-    }
-
-    j += IndexLength + 1;
-
-    memcpy(Name8dot3->Buffer + j, ExtBuffer, ExtLength * sizeof(WCHAR));
-    Name8dot3->Length = (USHORT)(j + ExtLength) * sizeof(WCHAR);
-
-    DPRINT("Name8dot3: '%wZ'\n", Name8dot3);
-
-    /* Update context */
-    Context->NameLength = (UCHAR)CopyLength;
-    Context->ExtensionLength = ExtLength;
-
-    memcpy(Context->NameBuffer, NameBuffer, CopyLength * sizeof(WCHAR));
-    memcpy(Context->ExtensionBuffer, ExtBuffer, ExtLength * sizeof(WCHAR));
+    }
+
+    /* Calculate index length and index buffer */
+    Index = Context->LastIndexValue;
+    for (IndexLength = 1; IndexLength <= 7 && Index > 0; IndexLength++)
+    {
+        IndexBuffer[8 - IndexLength] = L'0' + (Index % 10);
+        Index /= 10;
+    }
+
+    IndexBuffer[8 - IndexLength] = L'~';
+
+    /* Reset name length */
+    Name8dot3->Length = 0;
+
+    /* If name present */
+    if (Context->NameLength)
+    {
+        /* Copy name buffer */
+        Length = Context->NameLength * sizeof(WCHAR);
+        RtlCopyMemory(Name8dot3->Buffer, Context->NameBuffer, Length);
+        Name8dot3->Length = Length;
+    }
+
+    /* Copy index buffer */
+    Length = IndexLength * sizeof(WCHAR);
+    RtlCopyMemory(Name8dot3->Buffer + (Name8dot3->Length / sizeof(WCHAR)),
+                  IndexBuffer + (8 - IndexLength),
+                  Length);
+    Name8dot3->Length += Length;
+
+    /* If extension present */
+    if (Context->ExtensionLength)
+    {
+        /* Copy extension buffer */
+        Length = Context->ExtensionLength * sizeof(WCHAR);
+        RtlCopyMemory(Name8dot3->Buffer + (Name8dot3->Length / sizeof(WCHAR)),
+                      Context->ExtensionBuffer,
+                      Length);
+        Name8dot3->Length += Length;
+    }
 }