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Create a branch for header work.
svn path=/branches/header-work/; revision=45691
This commit is contained in:
Timo Kreuzer
parent
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commit
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19538 changed files with 0 additions and 1063950 deletions
309
lib/rtl/dos8dot3.c
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309
lib/rtl/dos8dot3.c
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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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/* CONSTANTS *****************************************************************/
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const PCHAR RtlpShortIllegals = " ;+=[],\"*\\<>/?:|";
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/* FUNCTIONS *****************************************************************/
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static BOOLEAN
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RtlpIsShortIllegal(CHAR Char)
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{
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return strchr(RtlpShortIllegals, Char) ? TRUE : FALSE;
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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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USHORT Hash = 0;
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ULONG Length;
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PWCHAR c;
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Length = Name->Length / sizeof(WCHAR);
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c = Name->Buffer;
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while(Length--)
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{
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Hash = (Hash + (*c << 4) + (*c >> 4)) * 11;
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c++;
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}
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return Hash;
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}
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static ULONG
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RtlpGetIndexLength(ULONG Index)
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{
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ULONG Length = 0;
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while (Index)
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{
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Index /= 10;
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Length++;
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}
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return Length ? Length : 1;
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}
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/*
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* @implemented
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*/
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VOID 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 Count;
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WCHAR NameBuffer[8];
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WCHAR ExtBuffer[4];
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ULONG StrLength;
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ULONG NameLength;
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ULONG ExtLength;
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ULONG CopyLength;
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ULONG DotPos;
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ULONG i, j;
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ULONG IndexLength;
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ULONG CurrentIndex;
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USHORT Checksum;
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CHAR c;
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StrLength = Name->Length / sizeof(WCHAR);
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DPRINT("StrLength: %lu\n", StrLength);
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/* Find last dot in Name */
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DotPos = StrLength;
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for (i = 0; i < StrLength; i++)
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{
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if (Name->Buffer[i] == L'.')
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{
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DotPos = i;
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}
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}
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DPRINT("DotPos: %lu\n", DotPos);
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/* Copy name (6 valid characters max) */
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for (i = 0, NameLength = 0; NameLength < 6 && i < DotPos; i++)
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{
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c = 0;
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RtlUpcaseUnicodeToOemN(&c, sizeof(CHAR), &Count, &Name->Buffer[i], sizeof(WCHAR));
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if (Count != 1 || c == 0 || RtlpIsShortIllegal(c))
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{
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NameBuffer[NameLength++] = L'_';
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}
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else if (c != '.')
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{
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NameBuffer[NameLength++] = (WCHAR)c;
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}
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}
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DPRINT("NameBuffer: '%.08S'\n", NameBuffer);
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DPRINT("NameLength: %lu\n", NameLength);
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/* Copy extension (4 valid characters max) */
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if (DotPos < StrLength)
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{
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for (i = DotPos, ExtLength = 0; ExtLength < 4 && i < StrLength; i++)
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{
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c = 0;
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RtlUpcaseUnicodeToOemN(&c, sizeof(CHAR), &Count, &Name->Buffer[i], sizeof(WCHAR));
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if (Count != 1 || c == 0 || RtlpIsShortIllegal(Name->Buffer[i]))
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{
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ExtBuffer[ExtLength++] = L'_';
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}
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else
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{
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ExtBuffer[ExtLength++] = c;
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}
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}
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}
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else
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{
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ExtLength = 0;
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}
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DPRINT("ExtBuffer: '%.04S'\n", ExtBuffer);
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DPRINT("ExtLength: %lu\n", ExtLength);
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/* Determine next index */
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IndexLength = RtlpGetIndexLength(Context->LastIndexValue);
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if (Context->CheckSumInserted)
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{
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CopyLength = min(NameLength, 8 - 4 - 1 - IndexLength);
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Checksum = RtlpGetCheckSum(Name);
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}
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else
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{
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CopyLength = min(NameLength, 8 - 1 - IndexLength);
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Checksum = 0;
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}
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DPRINT("CopyLength: %lu\n", CopyLength);
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if ((Context->NameLength == CopyLength) &&
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(wcsncmp(Context->NameBuffer, NameBuffer, CopyLength) == 0) &&
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(Context->ExtensionLength == ExtLength) &&
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(wcsncmp(Context->ExtensionBuffer, ExtBuffer, ExtLength) == 0) &&
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(Checksum == Context->Checksum) &&
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(Context->LastIndexValue < 999))
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{
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Context->LastIndexValue++;
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if (Context->CheckSumInserted == FALSE &&
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Context->LastIndexValue > 9)
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{
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Context->CheckSumInserted = TRUE;
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Context->LastIndexValue = 1;
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Context->Checksum = RtlpGetCheckSum(Name);
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}
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}
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else
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{
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Context->LastIndexValue = 1;
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Context->CheckSumInserted = FALSE;
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}
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IndexLength = RtlpGetIndexLength(Context->LastIndexValue);
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DPRINT("CurrentIndex: %lu, IndexLength %lu\n", Context->LastIndexValue, IndexLength);
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if (Context->CheckSumInserted)
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{
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CopyLength = min(NameLength, 8 - 4 - 1 - IndexLength);
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}
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else
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{
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CopyLength = min(NameLength, 8 - 1 - IndexLength);
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}
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/* Build the short name */
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memcpy(Name8dot3->Buffer, NameBuffer, CopyLength * sizeof(WCHAR));
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j = CopyLength;
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if (Context->CheckSumInserted)
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{
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j += 3;
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Checksum = Context->Checksum;
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for (i = 0; i < 4; i++)
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{
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Name8dot3->Buffer[j--] = (Checksum % 16) > 9 ? (Checksum % 16) + L'A' - 10 : (Checksum % 16) + L'0';
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Checksum /= 16;
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}
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j = CopyLength + 4;
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}
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Name8dot3->Buffer[j++] = L'~';
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j += IndexLength - 1;
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CurrentIndex = Context->LastIndexValue;
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for (i = 0; i < IndexLength; i++)
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{
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Name8dot3->Buffer[j--] = (CurrentIndex % 10) + L'0';
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CurrentIndex /= 10;
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}
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j += IndexLength + 1;
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memcpy(Name8dot3->Buffer + j, ExtBuffer, ExtLength * sizeof(WCHAR));
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Name8dot3->Length = (j + ExtLength) * sizeof(WCHAR);
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DPRINT("Name8dot3: '%wZ'\n", Name8dot3);
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/* Update context */
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Context->NameLength = CopyLength;
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Context->ExtensionLength = ExtLength;
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memcpy(Context->NameBuffer, NameBuffer, CopyLength * sizeof(WCHAR));
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memcpy(Context->ExtensionBuffer, ExtBuffer, ExtLength * sizeof(WCHAR));
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}
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/*
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* @implemented
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*/
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BOOLEAN
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NTAPI
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RtlIsNameLegalDOS8Dot3(IN PCUNICODE_STRING UnicodeName,
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IN OUT POEM_STRING AnsiName OPTIONAL,
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IN OUT PBOOLEAN SpacesFound 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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if (!AnsiName)
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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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AnsiName = &OemString;
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}
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if (RtlUpcaseUnicodeStringToCountedOemString( AnsiName, UnicodeName, FALSE ) != STATUS_SUCCESS)
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return FALSE;
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if ((AnsiName->Length > 12) || (AnsiName->Buffer == NULL)) return FALSE;
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/* a starting . is invalid, except for . and .. */
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if (AnsiName->Buffer[0] == '.')
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{
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if (AnsiName->Length != 1 && (AnsiName->Length != 2 || AnsiName->Buffer[1] != '.')) return FALSE;
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if (SpacesFound) *SpacesFound = FALSE;
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return TRUE;
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}
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for (i = 0; i < AnsiName->Length; i++)
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{
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switch (AnsiName->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 == AnsiName->Length-1 || AnsiName->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, AnsiName->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 (AnsiName->Length > 8) return FALSE;
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}
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else
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{
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if (Dot > 8 || (AnsiName->Length - Dot > 4) || Dot == AnsiName->Length - 1) return FALSE;
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}
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if (SpacesFound) *SpacesFound = GotSpace;
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return TRUE;
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}
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/*
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* @unimplemented
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*/
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NTSTATUS
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NTAPI
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RtlVolumeDeviceToDosName(
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IN PVOID VolumeDeviceObject,
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OUT PUNICODE_STRING DosName
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)
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{
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UNIMPLEMENTED;
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return STATUS_NOT_IMPLEMENTED;
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}
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/* EOF */
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