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Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers into modules, and delete rossubsys.
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Colin Finck
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24198 changed files with 0 additions and 37285 deletions
311
sdk/lib/rtl/dos8dot3.c
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311
sdk/lib/rtl/dos8dot3.c
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/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS system libraries
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* FILE: lib/rtl/dos8dot3.c
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* PURPOSE: Short name (8.3 name) functions
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* PROGRAMMER: Eric Kohl
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*/
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/* INCLUDES ******************************************************************/
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#include <rtl.h>
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#define NDEBUG
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#include <debug.h>
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extern PUSHORT NlsUnicodeToMbOemTable;
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/* CONSTANTS *****************************************************************/
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const ULONG RtlpShortIllegals[] = { 0xFFFFFFFF, 0xFC009C04, 0x38000000, 0x10000000 };
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/* FUNCTIONS *****************************************************************/
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BOOLEAN
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NTAPI
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RtlIsValidOemCharacter(IN PWCHAR Char);
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static BOOLEAN
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RtlpIsShortIllegal(const WCHAR Char)
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{
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return (Char < 128 && (RtlpShortIllegals[Char / 32] & (1 << (Char % 32))));
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}
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static USHORT
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RtlpGetCheckSum(PUNICODE_STRING Name)
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{
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PWCHAR CurrentChar;
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USHORT Hash;
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USHORT Saved;
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USHORT Length;
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if (!Name->Length)
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return 0;
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if (Name->Length == sizeof(WCHAR))
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return Name->Buffer[0];
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CurrentChar = Name->Buffer;
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Hash = (*CurrentChar << 8) + *(CurrentChar + 1);
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if (Name->Length == 2 * sizeof(WCHAR))
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return Hash;
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Saved = Hash;
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Length = 2;
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do
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{
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CurrentChar += 2;
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Hash = (Hash << 7) + *CurrentChar;
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Hash = (Saved >> 1) + (Hash << 8);
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if (Length + 1 < Name->Length / sizeof(WCHAR))
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{
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Hash += *(CurrentChar + 1);
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}
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Saved = Hash;
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Length += 2;
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}
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while (Length < Name->Length / sizeof(WCHAR));
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return Hash;
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}
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/*
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* @implemented
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*/
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VOID
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NTAPI
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RtlGenerate8dot3Name(IN PUNICODE_STRING Name,
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IN BOOLEAN AllowExtendedCharacters,
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IN OUT PGENERATE_NAME_CONTEXT Context,
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OUT PUNICODE_STRING Name8dot3)
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{
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ULONG Length = Name->Length / sizeof(WCHAR);
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ULONG IndexLength;
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ULONG Index;
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ULONG DotPos;
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WCHAR IndexBuffer[8];
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WCHAR Char;
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USHORT Checksum;
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if (!Context->NameLength)
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{
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DotPos = Length;
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/* Find last dot in Name */
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for (Index = 0; Index < Length; Index++)
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{
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if (Name->Buffer[Index] == L'.')
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DotPos = Index;
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}
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/* Copy name (6 valid characters max) */
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for (Index = 0; Index < DotPos && Context->NameLength < 6; Index++)
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{
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Char = Name->Buffer[Index];
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if ((Char > L' ') && (Char != L'.') &&
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((Char < 127) || (AllowExtendedCharacters && RtlIsValidOemCharacter(&Char))))
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{
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if (RtlpIsShortIllegal(Char))
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Char = L'_';
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else if (Char >= L'a' && Char <= L'z')
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Char = RtlpUpcaseUnicodeChar(Char);
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Context->NameBuffer[Context->NameLength] = Char;
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++Context->NameLength;
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}
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}
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/* Copy extension (4 valid characters max) */
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Context->ExtensionLength = 0;
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if (DotPos < Length)
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{
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Context->ExtensionBuffer[0] = L'.';
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Context->ExtensionLength = 1;
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while (DotPos < Length && Context->ExtensionLength < 4)
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{
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Char = Name->Buffer[DotPos];
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if ((Char > L' ') && (Char != L'.') &&
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((Char < 127) || (AllowExtendedCharacters && RtlIsValidOemCharacter(&Char))))
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{
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if (RtlpIsShortIllegal(Char))
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Char = L'_';
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else if (Char >= L'a' && Char <= L'z')
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Char = RtlpUpcaseUnicodeChar(Char);
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Context->ExtensionBuffer[Context->ExtensionLength++] = Char;
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}
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Char = UNICODE_NULL;
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++DotPos;
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}
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if (Char != UNICODE_NULL)
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Context->ExtensionBuffer[Context->ExtensionLength - 1] = L'~';
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}
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if (Context->NameLength <= 2)
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{
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Checksum = Context->Checksum = RtlpGetCheckSum(Name);
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for (Index = 0; Index < 4; Index++)
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{
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Context->NameBuffer[Context->NameLength + Index] =
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(Checksum & 0xF) > 9 ? (Checksum & 0xF) + L'A' - 10 : (Checksum & 0xF) + L'0';
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Checksum >>= 4;
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}
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Context->CheckSumInserted = TRUE;
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Context->NameLength += 4;
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}
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}
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++Context->LastIndexValue;
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if (Context->LastIndexValue > 4 && !Context->CheckSumInserted)
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{
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Checksum = Context->Checksum = RtlpGetCheckSum(Name);
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for (Index = 2; Index < 6; Index++)
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{
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Context->NameBuffer[Index] =
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(Checksum & 0xF) > 9 ? (Checksum & 0xF) + L'A' - 10 : (Checksum & 0xF) + L'0';
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Checksum >>= 4;
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}
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Context->CheckSumInserted = TRUE;
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Context->NameLength = 6;
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Context->LastIndexValue = 1;
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}
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/* Calculate index length and index buffer */
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Index = Context->LastIndexValue;
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for (IndexLength = 1; IndexLength <= 7 && Index > 0; IndexLength++)
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{
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IndexBuffer[8 - IndexLength] = L'0' + (Index % 10);
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Index /= 10;
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}
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IndexBuffer[8 - IndexLength] = L'~';
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/* Reset name length */
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Name8dot3->Length = 0;
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/* If name present */
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if (Context->NameLength)
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{
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/* Copy name buffer */
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Length = Context->NameLength * sizeof(WCHAR);
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RtlCopyMemory(Name8dot3->Buffer, Context->NameBuffer, Length);
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Name8dot3->Length = Length;
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}
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/* Copy index buffer */
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Length = IndexLength * sizeof(WCHAR);
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RtlCopyMemory(Name8dot3->Buffer + (Name8dot3->Length / sizeof(WCHAR)),
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IndexBuffer + (8 - IndexLength),
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Length);
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Name8dot3->Length += Length;
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/* If extension present */
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if (Context->ExtensionLength)
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{
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/* Copy extension buffer */
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Length = Context->ExtensionLength * sizeof(WCHAR);
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RtlCopyMemory(Name8dot3->Buffer + (Name8dot3->Length / sizeof(WCHAR)),
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Context->ExtensionBuffer,
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Length);
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Name8dot3->Length += Length;
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}
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}
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/*
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* @implemented
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* Note: the function does not conform to the annotations.
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* SpacesFound is not always set!
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*/
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_IRQL_requires_max_(PASSIVE_LEVEL)
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_Must_inspect_result_
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NTSYSAPI
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BOOLEAN
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NTAPI
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RtlIsNameLegalDOS8Dot3(IN PCUNICODE_STRING Name,
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IN OUT POEM_STRING OemName,
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OUT PBOOLEAN NameContainsSpaces OPTIONAL)
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{
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static const char Illegal[] = "*?<>|\"+=,;[]:/\\\345";
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int Dot = -1;
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int i;
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char Buffer[12];
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OEM_STRING OemString;
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BOOLEAN GotSpace = FALSE;
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NTSTATUS Status;
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if (!OemName)
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{
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OemString.Length = sizeof(Buffer);
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OemString.MaximumLength = sizeof(Buffer);
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OemString.Buffer = Buffer;
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OemName = &OemString;
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}
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Status = RtlUpcaseUnicodeStringToCountedOemString(OemName, Name, FALSE);
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if (!NT_SUCCESS(Status))
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return FALSE;
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if ((OemName->Length > 12) || (OemName->Buffer == NULL)) return FALSE;
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/* a starting . is invalid, except for . and .. */
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if (OemName->Buffer[0] == '.')
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{
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if (OemName->Length != 1 && (OemName->Length != 2 || OemName->Buffer[1] != '.')) return FALSE;
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if (NameContainsSpaces) *NameContainsSpaces = FALSE;
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return TRUE;
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}
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for (i = 0; i < OemName->Length; i++)
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{
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switch (OemName->Buffer[i])
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{
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case ' ':
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/* leading/trailing spaces not allowed */
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if (!i || i == OemName->Length-1 || OemName->Buffer[i+1] == '.') return FALSE;
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GotSpace = TRUE;
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break;
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case '.':
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if (Dot != -1) return FALSE;
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Dot = i;
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break;
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default:
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if (strchr(Illegal, OemName->Buffer[i])) return FALSE;
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break;
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}
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}
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/* check file part is shorter than 8, extension shorter than 3
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* dot cannot be last in string
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*/
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if (Dot == -1)
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{
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if (OemName->Length > 8) return FALSE;
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}
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else
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{
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if (Dot > 8 || (OemName->Length - Dot > 4) || Dot == OemName->Length - 1) return FALSE;
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}
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if (NameContainsSpaces) *NameContainsSpaces = GotSpace;
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return TRUE;
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}
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/* EOF */
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