src/libcaptive/fs/name.c

   1 /* $Id$
   2  * reactos filesystem name strings functions emulation of libcaptive
   3  * Copyright (C) 2002 Jan Kratochvil <project-captive@jankratochvil.net>
   4  *
   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; exactly version 2 of June 1991 is required
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19
  20 #include "config.h"
  21
  22 #include "reactos/ddk/fsfuncs.h"        /* self */
  23 #include <glib/gmessages.h>
  24 #include "captive/unicode.h"
  25 #include "reactos/unicode.h"    /* for ANSI_* */
  26 #include "captive/macros.h"
  27 #include <ctype.h>
  28
  29
  30 UCHAR **FsRtlLegalAnsiCharacterArray;
  31
  32
  33 /**
  34  * captive_FsRtlLegalAnsiCharacterArray_init:
  35  * Initialize #FsRtlLegalAnsiCharacterArray character classes
  36  * by appropriate #FSRTL_FAT_LEGAL etc. flags.
  37  */
  38 void captive_FsRtlLegalAnsiCharacterArray_init(void)
  39 {
  40 static UCHAR *array;
  41 guint ui;
  42
  43         /* Use allocation instead of static array to get ElectricFence sanity boundaries.
  44          * Use even the negative 0x80 part as someone may access 'FsRtlLegalAnsiCharacterArray'
  45          * with 'signed char' (but also with 'unsigned char'). See also memcpy(3) below.
  46          */
  47         captive_new0n(array,0x80+0x100);
  48         array+=0x80;
  49
  50         for (ui=0;ui<0x100;ui++) {
  51 UCHAR f=0;
  52
  53                 if (isalnum(ui))
  54                         f|=FSRTL_FAT_LEGAL;
  55                 if (isalnum(ui))
  56                         f|=FSRTL_HPFS_LEGAL;
  57                 if (isalnum(ui))
  58                         f|=FSRTL_NTFS_LEGAL;
  59                 if (ui=='*' || ui=='?')
  60                         f|=FSRTL_WILD_CHARACTER;
  61                 if (isalnum(ui))
  62                         f|=FSRTL_OLE_LEGAL;
  63
  64                 array[(unsigned int)(unsigned char)ui]=f;
  65                 }
  66
  67         memcpy(array-0x80,array+0x80,0x80*sizeof(*array));
  68
  69         FsRtlLegalAnsiCharacterArray=&array;
  70 }
  71
  72
  73 /**
  74  * FsRtlDoesNameContainWildCards:
  75  * @Name: Filename to check for wildcards.
  76  * %NULL value is forbidden.
  77  * Non-zero terminated #PUNICODE_STRING is permitted.
  78  *
  79  * Check if @Name contains wildcard markers as its substring(s).
  80  *
  81  * Returns: %TRUE if @Name contains "*", "?", %ANSI_DOS_STAR, %ANSI_DOS_DOT or %ANSI_DOS_QM.
  82  */
  83 BOOLEAN FsRtlDoesNameContainWildCards(IN PUNICODE_STRING Name_nonconst)
  84 {
  85 const UNICODE_STRING *cName=Name_nonconst;
  86 const WCHAR *wcp;
  87
  88         g_return_val_if_fail(captive_validate_UnicodeString_noterm(cName),FALSE);
  89
  90         for (wcp=cName->Buffer;wcp<cName->Buffer+(cName->Length/sizeof(*cName->Buffer));*wcp++)
  91                 if (0
  92                                 || *wcp=='*'
  93                                 || *wcp=='?'
  94                                 || *wcp==ANSI_DOS_STAR
  95                                 || *wcp==ANSI_DOS_DOT
  96                                 || *wcp==ANSI_DOS_QM)
  97                         return TRUE;
  98         return FALSE;
  99 }
 100
 101
 102 /**
 103  * FsRtlDissectName:
 104  * @Path: Initialized #UNICODE_STRING to parse.
 105  * @FirstName: Returns the first filename from @Path.
 106  * %NULL value is forbidden.
 107  * @RemainingName: Returns the part of @Path behind @FirstName.
 108  * %NULL value is forbidden.
 109  *
 110  * Will parse @Path as regex (FirstName,RemainingName)=/^\?([^/]*)/?(.*)$/;
 111  * @FirstName and @RemainingName must be pointers to allocated #UNICODE_STRING
 112  * but their #Buffer will be pointing to inside @Path buffer afterwards.
 113  * Therefore do not free it! The returned strings may not be 0-terminated strings.
 114  */
 115 VOID FsRtlDissectName(IN UNICODE_STRING Path,OUT PUNICODE_STRING FirstName,OUT PUNICODE_STRING RemainingName)
 116 {
 117 PWSTR Path_end;
 118 PWSTR delim_FirstName_start    ,delim_FirstName_end;
 119 PWSTR delim_RemainingName_start,delim_RemainingName_end;
 120
 121         g_return_if_fail(captive_validate_UnicodeString(&Path));
 122         g_return_if_fail(FirstName!=NULL);
 123         g_return_if_fail(RemainingName!=NULL);
 124
 125         Path_end=Path.Buffer+Path.Length/sizeof(*Path.Buffer);
 126
 127         delim_FirstName_start=Path.Buffer;
 128         if (delim_FirstName_start<Path_end && *delim_FirstName_start=='\\')
 129                 delim_FirstName_start++;
 130         for (delim_FirstName_end=delim_FirstName_start;
 131                         delim_FirstName_end<Path_end && *delim_FirstName_end!='\\';
 132                         delim_FirstName_end++);
 133         delim_RemainingName_start=delim_FirstName_end;
 134         if (delim_RemainingName_start<Path_end && *delim_RemainingName_start=='\\')
 135                 delim_RemainingName_start++;
 136         delim_RemainingName_end=Path_end;
 137
 138         g_assert(delim_FirstName_start    <=delim_FirstName_end);
 139         g_assert(delim_FirstName_end      <=delim_RemainingName_start);
 140         g_assert(delim_RemainingName_start<=delim_RemainingName_end);
 141
 142         FirstName->Buffer=delim_FirstName_start;
 143         FirstName->Length=(delim_FirstName_end-delim_FirstName_start)*sizeof(*FirstName->Buffer);
 144         FirstName->MaximumLength=FirstName->Length;
 145         FirstName->Buffer=delim_FirstName_start;
 146
 147         RemainingName->Buffer=delim_RemainingName_start;
 148         RemainingName->Length=(delim_RemainingName_end-delim_RemainingName_start)*sizeof(*RemainingName->Buffer);
 149         RemainingName->MaximumLength=RemainingName->Length;
 150         RemainingName->Buffer=delim_RemainingName_start;
 151 }