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
|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/***
*makepath.c - create path name from components
*
*
*Purpose:
* To provide support for creation of full path names from components
*
*******************************************************************************/
#include "stdafx.h"
#include "winwrap.h"
#include "utilcode.h"
#include "ex.h"
/***
*void Makepath() - build path name from components
*
*Purpose:
* create a path name from its individual components
*
*Entry:
* CQuickWSTR &szPath - Buffer for constructed path
* WCHAR *drive - pointer to drive component, may or may not contain
* trailing ':'
* WCHAR *dir - pointer to subdirectory component, may or may not include
* leading and/or trailing '/' or '\' characters
* WCHAR *fname - pointer to file base name component
* WCHAR *ext - pointer to extension component, may or may not contain
* a leading '.'.
*
*Exit:
* path - pointer to constructed path name
*
*Exceptions:
*
*******************************************************************************/
void MakePath (
__out CQuickWSTR &szPath,
__in LPCWSTR drive,
__in LPCWSTR dir,
__in LPCWSTR fname,
__in LPCWSTR ext
)
{
CONTRACTL
{
NOTHROW;
GC_NOTRIGGER;
}
CONTRACTL_END
SIZE_T maxCount = 4 // Possible separators between components, plus null terminator
+ (drive != nullptr ? 2 : 0)
+ (dir != nullptr ? wcslen(dir) : 0)
+ (fname != nullptr ? wcslen(fname) : 0)
+ (ext != nullptr ? wcslen(ext) : 0);
LPWSTR path = szPath.AllocNoThrow(maxCount);
const WCHAR *p;
DWORD count = 0;
/* we assume that the arguments are in the following form (although we
* do not diagnose invalid arguments or illegal filenames (such as
* names longer than 8.3 or with illegal characters in them)
*
* drive:
* A ; or
* A:
* dir:
* \top\next\last\ ; or
* /top/next/last/ ; or
* either of the above forms with either/both the leading
* and trailing / or \ removed. Mixed use of '/' and '\' is
* also tolerated
* fname:
* any valid file name
* ext:
* any valid extension (none if empty or null )
*/
/* copy drive */
if (drive && *drive) {
*path++ = *drive;
*path++ = _T(':');
count += 2;
}
/* copy dir */
if ((p = dir)) {
while (*p) {
*path++ = *p++;
count++;
_ASSERTE(count < maxCount);
}
#ifdef _MBCS
if (*(p=_mbsdec(dir,p)) != _T('/') && *p != _T('\\')) {
#else /* _MBCS */
// suppress warning for the following line; this is safe but would require significant code
// delta for prefast to understand.
#ifdef _PREFAST_
#pragma warning( suppress: 26001 )
#endif
if (*(p-1) != _T('/') && *(p-1) != _T('\\')) {
#endif /* _MBCS */
*path++ = _T('\\');
count++;
_ASSERTE(count < maxCount);
}
}
/* copy fname */
if ((p = fname)) {
while (*p) {
*path++ = *p++;
count++;
_ASSERTE(count < maxCount);
}
}
/* copy ext, including 0-terminator - check to see if a '.' needs
* to be inserted.
*/
if ((p = ext)) {
if (*p && *p != _T('.')) {
*path++ = _T('.');
count++;
_ASSERTE(count < maxCount);
}
while ((*path++ = *p++)) {
count++;
_ASSERTE(count < maxCount);
}
}
else {
/* better add the 0-terminator */
*path = _T('\0');
}
szPath.Shrink(count + 1);
}
// Returns the directory for HMODULE. So, if HMODULE was for "C:\Dir1\Dir2\Filename.DLL",
// then this would return "C:\Dir1\Dir2\" (note the trailing backslash).
HRESULT GetHModuleDirectory(
__in HMODULE hMod,
SString& wszPath)
{
CONTRACTL
{
NOTHROW;
GC_NOTRIGGER;
CANNOT_TAKE_LOCK;
}
CONTRACTL_END;
DWORD dwRet = WszGetModuleFileName(hMod, wszPath);
if (dwRet == 0)
{ // Some other error.
return HRESULT_FROM_GetLastError();
}
CopySystemDirectory(wszPath, wszPath);
return S_OK;
}
//
// Returns path name from a file name.
// Example: For input "C:\Windows\System.dll" returns "C:\Windows\".
// Warning: The input file name string might be destroyed.
//
// Arguments:
// pPathString - [in] SString with file name
//
// pBuffer - [out] SString .
//
// Return Value:
// S_OK - Output buffer contains path name.
// other errors - If Sstring throws.
//
HRESULT CopySystemDirectory(const SString& pPathString,
SString& pbuffer)
{
HRESULT hr = S_OK;
EX_TRY
{
pbuffer.Set(pPathString);
SString::Iterator iter = pbuffer.End();
if (pbuffer.FindBack(iter,DIRECTORY_SEPARATOR_CHAR_W))
{
iter++;
pbuffer.Truncate(iter);
}
else
{
hr = E_UNEXPECTED;
}
}
EX_CATCH_HRESULT(hr);
return hr;
}
|
