luc14n0/glib
1
0
Fork 0
mirror of https://gitlab.gnome.org/GNOME/glib.git synced 2025-12-10 18:43:42 +01:00
Code Issues Packages Projects Releases Wiki Activity

W32: Don't always strip path prefixes

Browse Source 
Extended path prefix looks like "\\?\",
and NT object path prefix looks like "\??\".
Strip them only if they are followed by a character
(any character) and a colon (:), indicating that
it's a DOS path with a drive.
Otherwise stripping such prefix might result in a patch
that looks like a relative path.

For example, "\\?\Volume{GUID}\" becomes "Volume{GUID}\",
which is a valid directory name.

Currently it's up to the user to make sense of such paths.
This commit is contained in:
Руслан Ижбулатов
2018-08-08 22:22:08 +00:00
parent b7fba1a5e3
commit 05fdd09740
2 changed files with 116 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

77
glib/gstdio-private.c Normal file
View File

@@ -0,0 +1,77 @@
/* gstdio-private.c - private glib functions for gstdio.c
*
* Copyright 2004 Tor Lillqvist
* Copyright 2018 Руслан Ижбулатов
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
/* Strips "\\\\?\\" extended prefix or
* "\\??\\" NT Object Manager prefix from
* @str in-place, using memmove.
* @str_size must point to the size of @str
* in gunichar2s, including NUL-terminator
* (if @str is NUL-terminated; it doesn't have to be).
* On return @str_size will correctly reflect changes
* in @str size (if any).
* Returns TRUE if @str was modified.
*/
static gboolean
_g_win32_strip_extended_ntobjm_prefix (gunichar2 *str,
gsize *str_size)
{
const wchar_t *extended_prefix = L"\\\\?\\";
const gsize extended_prefix_len = wcslen (extended_prefix);
const gsize extended_prefix_len_bytes = sizeof (gunichar2) * extended_prefix_len;
const gsize extended_prefix_with_drive_len_bytes = sizeof (gunichar2) * (extended_prefix_len + 2);
const wchar_t *ntobjm_prefix = L"\\??\\";
const gsize ntobjm_prefix_len = wcslen (ntobjm_prefix);
const gsize ntobjm_prefix_len_bytes = sizeof (gunichar2) * ntobjm_prefix_len;
const gsize ntobjm_prefix_with_drive_len_bytes = sizeof (gunichar2) * (ntobjm_prefix_len + 2);
gboolean do_move = FALSE;
gsize move_shift = 0;
if ((*str_size) * sizeof (gunichar2) > extended_prefix_with_drive_len_bytes &&
memcmp (str,
extended_prefix,
extended_prefix_len_bytes) == 0 &&
iswascii (str[extended_prefix_len]) &&
iswalpha (str[extended_prefix_len]) &&
str[extended_prefix_len + 1] == L':')
{
do_move = TRUE;
move_shift = extended_prefix_len;
}
else if ((*str_size) * sizeof (gunichar2) > ntobjm_prefix_with_drive_len_bytes &&
memcmp (str,
ntobjm_prefix,
ntobjm_prefix_len_bytes) == 0 &&
iswascii (str[ntobjm_prefix_len]) &&
iswalpha (str[ntobjm_prefix_len]) &&
str[ntobjm_prefix_len + 1] == L':')
{
do_move = TRUE;
move_shift = ntobjm_prefix_len;
}
if (do_move)
{
*str_size -= move_shift;
memmove (str,
str + move_shift,
(*str_size) * sizeof (gunichar2));
}
return do_move;
}