1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
|
/** @file
Functions useful to operate file directories by parsing file path.
Copyright (c) 2007 - 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "CommonLib.h"
#include "OsPath.h"
//
// Functions implementations
//
#if 0
//
// BUGBUG: Not fully implemented yet.
//
CHAR8*
OsPathDirName (
IN CHAR8 *FilePath
)
/*++
Routine Description:
This function returns the directory path which contains the particular path.
Some examples:
"a/b/c" -> "a/b"
"a/b/c/" -> "a/b"
"a" -> "."
"." -> ".."
"/" -> NULL
This function does not check for the existence of the file.
The caller must free the string returned.
Arguments:
FilePath Path name of file to get the parent directory for.
Returns:
NULL if error
--*/
{
CHAR8 *Return;
CHAR8 *Pos;
CHAR8 Char;
UINTN Length;
INTN Offset;
Length = strlen (FilePath);
if (Length == 0) {
return NULL;
}
//
// Check for the root directory case
//
if (
(Length == 3 && isalpha (FilePath[0]) && (strcmp(FilePath + 1, ":\\") == 0)) ||
(strcmp(FilePath, "/") == 0)
) {
return NULL;
}
//
// If the path ends with a path separator, then just append ".."
//
Char = FilePath[Length - 1];
if (Char == '/' || Char == '\\') {
return OsPathJoin (FilePath, "..");
}
//
//
//
for (Offset = Length; Offset > 0; Offset--) {
if ((Return[Offset] == '/') || (Return[Offset] == '\\')) {
Return[Offset] = '\0';
return Return;
}
}
}
#endif
#if 0
//
// BUGBUG: Not fully implemented yet.
//
VOID
OsPathNormPathInPlace (
IN CHAR8 *Path
)
/*++
Routine Description:
This function returns the directory path which contains the particular path.
Some examples:
"a/b/../c" -> "a/c"
"a/b//c" -> "a/b/c"
"a/./b" -> "a/b"
This function does not check for the existence of the file.
Arguments:
Path Path name of file to normalize
Returns:
The string is altered in place.
--*/
{
CHAR8 *Pos;
INTN Offset;
BOOLEAN TryAgain;
UINTN Length;
UINTN Remaining;
UINTN SubLength;
do {
TryAgain = FALSE;
Length = strlen (Path);
for (Offset = 0; Offset < Length; Offset++) {
Remaining = Length - Offset;
//
// Collapse '//' -> '/'
//
if (
(Remaining >= 2) &&
((Offset > 0) || (Path[0] != '\\')) &&
IsDirSep (Path[Offset]) && IsDirSep (Path[Offset + 1])
) {
memmove (&Path[Offset], &Path[Offset + 1], Remaining);
TryAgain = TRUE;
break;
}
//
// Collapse '/./' -> '/'
//
if ((Remaining >= 3) && IsDirSep (Path[Offset]) &&
(Path[Offset + 1] == '.') && IsDirSep (Path[Offset + 2])
) {
memmove (&Path[Offset], &Path[Offset + 1], Remaining);
TryAgain = TRUE;
break;
}
//
// Collapse 'a/../b' -> 'b'
//
// BUGBUG: Not implemented yet
}
} while (TryAgain);
Return = CloneString (FilePath);
if (Return == NULL) {
return NULL;
}
Length = strlen (Return);
//
// Check for the root directory case
//
if (
(Length == 3 && isalpha (Return[0]) && (strcmp(Return + 1, ":\\") == 0)) ||
(strcmp(Return, "/") == 0)
) {
free (Return);
return NULL;
}
//
//
//
for (Offset = Length; Offset > 0; Offset--) {
if ((Return[Offset] == '/') || (Return[Offset] == '\\')) {
Return[Offset] = '\0';
return Return;
}
}
}
#endif
CHAR8*
OsPathPeerFilePath (
IN CHAR8 *OldPath,
IN CHAR8 *Peer
)
/*++
Routine Description:
This function replaces the final portion of a path with an alternative
'peer' filename. For example:
"a/b/../c", "peer" -> "a/b/../peer"
"a/b/", "peer" -> "a/b/peer"
"/a", "peer" -> "/peer"
"a", "peer" -> "peer"
This function does not check for the existence of the file.
Arguments:
OldPath Path name of replace the final segment
Peer The new path name to concatinate to become the peer path
Returns:
A CHAR8* string, which must be freed by the caller
--*/
{
CHAR8 *Result;
INTN Offset;
Result = (CHAR8 *) malloc (strlen (OldPath) + strlen (Peer) + 1);
if (Result == NULL) {
return NULL;
}
strcpy (Result, OldPath);
//
// Search for the last '/' or '\' in the string. If found, replace
// everything following it with Peer
//
for (Offset = strlen (Result); Offset >= 0; Offset--) {
if ((Result[Offset] == '/') || (Result[Offset] == '\\')) {
Result[Offset + 1] = '\0';
strcat (Result, Peer);
return Result;
}
}
//
// Neither a '/' nor a '\' was found. Therefore, we simply return Peer.
//
strcpy (Result, Peer);
return Result;
}
BOOLEAN
OsPathExists (
IN CHAR8 *InputFileName
)
/*++
Routine Description:
Checks if a file exists
Arguments:
InputFileName The name of the file to check for existence
Returns:
TRUE The file exists
FALSE The file does not exist
--*/
{
FILE *InputFile;
InputFile = fopen (LongFilePath (InputFileName), "rb");
if (InputFile == NULL) {
return FALSE;
} else {
fclose (InputFile);
return TRUE;
}
}
|
