blob: 25a7b7468807b5a3dd2fe46afb2c33cd1e132ca0 (
plain)
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
|
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include "dirent.h"
DIR*
opendir(const char* pDirName)
{
struct stat sb;
DIR* pDir;
char* pEndDirName;
int nBufferLen;
/* sanity checks */
if (!pDirName) {
errno = EINVAL;
return NULL;
}
if (stat(pDirName, &sb) != 0) {
errno = ENOENT;
return NULL;
}
if ((sb.st_mode & S_IFMT) != S_IFDIR) {
errno = ENOTDIR;
return NULL;
}
/* allocate a DIR structure to return */
pDir = (DIR *) malloc(sizeof (DIR));
if (!pDir)
return NULL;
/* input directory name length */
nBufferLen = strlen(pDirName);
/* copy input directory name to DIR buffer */
strcpy(pDir->dir_pDirectoryName, pDirName);
/* point to end of the copied directory name */
pEndDirName = &pDir->dir_pDirectoryName[nBufferLen - 1];
/* if directory name did not end in '/' or '\', add '/' */
if ((*pEndDirName != '/') && (*pEndDirName != '\\')) {
pEndDirName++;
*pEndDirName = '/';
}
/* now append the wildcard character to the buffer */
pEndDirName++;
*pEndDirName = '*';
pEndDirName++;
*pEndDirName = '\0';
/* other values defaulted */
pDir->dir_nNumFiles = 0;
pDir->dir_hDirHandle = INVALID_HANDLE_VALUE;
pDir->dir_ulCookie = __DIRENT_COOKIE;
return pDir;
}
void
closedir(DIR *pDir)
{
/* got a valid pointer? */
if (!pDir) {
errno = EINVAL;
return;
}
/* sanity check that this is a DIR pointer */
if (pDir->dir_ulCookie != __DIRENT_COOKIE) {
errno = EINVAL;
return;
}
/* close the WIN32 directory handle */
if (pDir->dir_hDirHandle != INVALID_HANDLE_VALUE)
FindClose(pDir->dir_hDirHandle);
free(pDir);
return;
}
struct dirent *
readdir(DIR* pDir)
{
WIN32_FIND_DATA wfdFindData;
if (!pDir) {
errno = EINVAL;
return NULL;
}
/* sanity check that this is a DIR pointer */
if (pDir->dir_ulCookie != __DIRENT_COOKIE) {
errno = EINVAL;
return NULL;
}
if (pDir->dir_nNumFiles == 0) {
pDir->dir_hDirHandle = FindFirstFile(pDir->dir_pDirectoryName, &wfdFindData);
if (pDir->dir_hDirHandle == INVALID_HANDLE_VALUE)
return NULL;
} else if (!FindNextFile(pDir->dir_hDirHandle, &wfdFindData))
return NULL;
/* bump count for next call to readdir() or telldir() */
pDir->dir_nNumFiles++;
/* fill in struct dirent values */
pDir->dir_sdReturn.d_ino = -1;
strcpy(pDir->dir_sdReturn.d_name, wfdFindData.cFileName);
return &pDir->dir_sdReturn;
}
void
rewinddir(DIR* pDir)
{
if (!pDir) {
errno = EINVAL;
return;
}
/* sanity check that this is a DIR pointer */
if (pDir->dir_ulCookie != __DIRENT_COOKIE) {
errno = EINVAL;
return;
}
/* close the WIN32 directory handle */
if (pDir->dir_hDirHandle != INVALID_HANDLE_VALUE)
if (!FindClose(pDir->dir_hDirHandle))
errno = EBADF;
/* reset members which control readdir() */
pDir->dir_hDirHandle = INVALID_HANDLE_VALUE;
pDir->dir_nNumFiles = 0;
return;
}
int
telldir(DIR* pDir)
{
if (!pDir) {
errno = EINVAL;
return -1;
}
/* sanity check that this is a DIR pointer */
if (pDir->dir_ulCookie != __DIRENT_COOKIE) {
errno = EINVAL;
return -1;
}
/* return number of times readdir() called */
return pDir->dir_nNumFiles;
}
void
seekdir(DIR* pDir, long nPosition)
{
if (!pDir)
return;
/* sanity check that this is a DIR pointer */
if (pDir->dir_ulCookie != __DIRENT_COOKIE)
return;
/* go back to beginning of directory */
rewinddir(pDir);
/* loop until we have found position we care about */
for (--nPosition; nPosition && readdir(pDir); nPosition--);
/* flag invalid nPosition value */
if (nPosition)
errno = EINVAL;
return;
}
|
