]>
git.proxmox.com Git - mirror_edk2.git/blob - MdePkg/Library/BaseLib/FilePaths.c
2 Defines file-path manipulation functions.
4 Copyright (c) 2011 - 2016, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php.
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
13 #include <Uefi/UefiBaseType.h>
14 #include <Library/BaseMemoryLib.h>
15 #include <Library/BaseLib.h>
16 #include <Protocol/SimpleTextIn.h>
19 Removes the last directory or file entry in a path by changing the last
22 @param[in,out] Path A pointer to the path to modify.
24 @retval FALSE Nothing was found to remove.
25 @retval TRUE A directory or file was removed.
36 // get directory name from path... ('chop' off extra)
38 for ( Walker
= Path
, LastSlash
= NULL
39 ; Walker
!= NULL
&& *Walker
!= CHAR_NULL
42 if (*Walker
== L
'\\' && *(Walker
+ 1) != CHAR_NULL
) {
46 if (LastSlash
!= NULL
) {
47 *LastSlash
= CHAR_NULL
;
54 Function to clean up paths.
56 - Single periods in the path are removed.
57 - Double periods in the path are removed along with a single parent directory.
58 - Forward slashes L'/' are converted to backward slashes L'\'.
60 This will be done inline and the existing buffer may be larger than required
63 @param[in] Path The pointer to the string containing the path.
65 @return Returns Path, otherwise returns NULL to indicate that an error has occured.
69 PathCleanUpDirectories(
80 // Fix up the '/' vs '\'
82 for (TempString
= Path
; TempString
!= NULL
&& *TempString
!= CHAR_NULL
; TempString
++) {
83 if (*TempString
== L
'/') {
90 while ((TempString
= StrStr(Path
, L
"\\..\\")) != NULL
) {
91 *TempString
= CHAR_NULL
;
93 PathRemoveLastItem(Path
);
94 TempSize
= StrSize(TempString
);
95 CopyMem(Path
+StrLen(Path
), TempString
, TempSize
);
97 if ((TempString
= StrStr(Path
, L
"\\..")) != NULL
&& *(TempString
+ 3) == CHAR_NULL
) {
98 *TempString
= CHAR_NULL
;
99 if (!PathRemoveLastItem(Path
)) {
106 while ((TempString
= StrStr(Path
, L
"\\.\\")) != NULL
) {
107 *TempString
= CHAR_NULL
;
109 TempSize
= StrSize(TempString
);
110 CopyMem(Path
+StrLen(Path
), TempString
, TempSize
);
112 if ((TempString
= StrStr(Path
, L
"\\.")) != NULL
&& *(TempString
+ 2) == CHAR_NULL
) {
113 *(TempString
+ 1) = CHAR_NULL
;
116 while ((TempString
= StrStr(Path
, L
"\\\\")) != NULL
) {
117 *TempString
= CHAR_NULL
;
119 TempSize
= StrSize(TempString
);
120 CopyMem(Path
+StrLen(Path
), TempString
, TempSize
);
122 if ((TempString
= StrStr(Path
, L
"\\\\")) != NULL
&& *(TempString
+ 1) == CHAR_NULL
) {
123 *(TempString
) = CHAR_NULL
;