3 * Copyright (C) 2002 ReactOS Team
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * COPYRIGHT: See COPYING in the top level directory
22 * PROJECT: ReactOS kernel
23 * FILE: ntoskrnl/rtl/dos8dot3.c
24 * PURPOSE: Short name (8.3 name) functions
25 * PROGRAMMER: Eric Kohl
28 /* INCLUDES ******************************************************************/
30 #include <ddk/ntddk.h>
31 #include <ntos/minmax.h>
34 #include <internal/debug.h>
37 /* CONSTANTS *****************************************************************/
39 const PWCHAR RtlpShortIllegals = L" ;+=[]',\"*\\<>/?:|";
42 /* FUNCTIONS *****************************************************************/
45 RtlpIsShortIllegal(WCHAR Char)
49 for (i = 0; RtlpShortIllegals[i]; i++)
51 if (Char == RtlpShortIllegals[i])
63 RtlGenerate8dot3Name(IN PUNICODE_STRING Name,
64 IN BOOLEAN AllowExtendedCharacters,
65 IN OUT PGENERATE_NAME_CONTEXT Context,
66 OUT PUNICODE_STRING Name8dot3)
78 memset(NameBuffer, 0, sizeof(NameBuffer));
79 memset(ExtBuffer, 0, sizeof(ExtBuffer));
81 StrLength = Name->Length / sizeof(WCHAR);
82 DPRINT("StrLength: %hu\n", StrLength);
84 /* Find last dot in Name */
86 for (i = 0; i < StrLength; i++)
88 if (Name->Buffer[i] == L'.')
98 DPRINT("DotPos: %hu\n", DotPos);
100 /* Copy name (6 valid characters max) */
101 for (i = 0, NameLength = 0; NameLength < 6 && i < DotPos; i++)
103 if ((!RtlpIsShortIllegal(Name->Buffer[i])) &&
104 (Name->Buffer[i] != L'.'))
106 NameBuffer[NameLength++] = RtlUpcaseUnicodeChar(Name->Buffer[i]);
109 DPRINT("NameBuffer: '%.08S'\n", NameBuffer);
110 DPRINT("NameLength: %hu\n", NameLength);
112 /* Copy extension (4 valid characters max) */
113 if (DotPos < StrLength)
115 for (i = DotPos, ExtLength = 0; ExtLength < 4 && i < StrLength; i++)
117 if (!RtlpIsShortIllegal(Name->Buffer[i]))
119 ExtBuffer[ExtLength++] = RtlUpcaseUnicodeChar(Name->Buffer[i]);
127 DPRINT("ExtBuffer: '%.04S'\n", ExtBuffer);
128 DPRINT("ExtLength: %hu\n", ExtLength);
130 /* Determine next index */
131 CurrentIndex = Context->LastIndexValue;
132 CopyLength = min(NameLength, (CurrentIndex < 10) ? 6 : 5);
133 DPRINT("CopyLength: %hu\n", CopyLength);
135 if ((Context->NameLength == CopyLength) &&
136 (wcsncmp(Context->NameBuffer, NameBuffer, CopyLength) == 0) &&
137 (Context->ExtensionLength == ExtLength) &&
138 (wcsncmp(Context->ExtensionBuffer, ExtBuffer, ExtLength) == 0))
142 DPRINT("CurrentIndex: %hu\n", CurrentIndex);
144 /* Build the short name */
145 for (i = 0; i < CopyLength; i++)
147 Name8dot3->Buffer[i] = NameBuffer[i];
150 Name8dot3->Buffer[i++] = L'~';
151 if (CurrentIndex >= 10)
152 Name8dot3->Buffer[i++] = (CurrentIndex / 10) + L'0';
153 Name8dot3->Buffer[i++] = (CurrentIndex % 10) + L'0';
155 for (j = 0; j < ExtLength; i++, j++)
157 Name8dot3->Buffer[i] = ExtBuffer[j];
160 Name8dot3->Length = i * sizeof(WCHAR);
162 DPRINT("Name8dot3: '%wZ'\n", Name8dot3);
165 Context->NameLength = CopyLength;
166 for (i = 0; i < CopyLength; i++)
168 Context->NameBuffer[i] = NameBuffer[i];
171 Context->ExtensionLength = ExtLength;
172 for (i = 0; i < ExtLength; i++)
174 Context->ExtensionBuffer[i] = ExtBuffer[i];
177 Context->LastIndexValue = CurrentIndex;
185 RtlIsNameLegalDOS8Dot3(IN PUNICODE_STRING UnicodeName,
186 IN PANSI_STRING AnsiName,
187 OUT PBOOLEAN SpacesFound)
189 PANSI_STRING name = AnsiName;
190 ANSI_STRING DummyString;
196 BOOLEAN HasSpace = FALSE;
197 BOOLEAN HasDot = FALSE;
199 if (UnicodeName->Length > 24)
201 return(FALSE); /* name too long */
208 name->MaximumLength = 12;
209 name->Buffer = Buffer;
212 Status = RtlUpcaseUnicodeStringToCountedOemString(name,
215 if (!NT_SUCCESS(Status))
220 Length = name->Length;
223 if (!(Length == 1 && *str == '.') &&
224 !(Length == 2 && *str == '.' && *(str + 1) == '.'))
226 for (i = 0; i < Length; i++, str++)
235 if ((HasDot) || /* two or more dots */
236 (i == 0) || /* dot is first char */
237 (i + 1 == Length) || /* dot is last char */
238 (Length - i > 4) || /* more than 3 chars of extension */
239 (HasDot == FALSE && i > 8)) /* name is longer than 8 chars */
247 /* Name is longer than 8 chars and does not have an extension */
248 if (Length > 8 && HasDot == FALSE)
254 *SpacesFound = HasSpace;