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
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
|
#ifndef ZZIP_INTERNAL_DIRENT_H
#define ZZIP_INTERNAL_DIRENT_H
#include <zzip/conf.h>
/*
* DO NOT USE THIS CODE.
*
* It is an internal header file for zziplib that carries some inline
* functions (or just static members) and a few defines, simply to be
* able to reuse these across - and have everything in a specific place.
*
* Copyright (c) 2002,2003 Guido Draheim
* All rights reserved,
* use under the restrictions of the
* Lesser GNU General Public License
* or alternatively the restrictions
* of the Mozilla Public License 1.1
*/
#ifdef ZZIP_HAVE_DIRENT_H
#define USE_DIRENT 1
#define _zzip_opendir opendir
#define _zzip_readdir readdir
#define _zzip_closedir closedir
#define _zzip_rewinddir rewinddir
#define _zzip_telldir telldir
#define _zzip_seekdir seekdir
#define _zzip_DIR DIR
#include <dirent.h>
#elif defined ZZIP_HAVE_WINBASE_H
#define USE_DIRENT 2
#define _zzip_opendir win32_opendir
#define _zzip_readdir win32_readdir
#define _zzip_closedir win32_closedir
#define _zzip_rewinddir win32_rewinddir
#define _zzip_telldir win32_telldir
#define _zzip_seekdir win32_seekdir
#define _zzip_DIR DIR
/*
* DIRENT.H (formerly DIRLIB.H)
*
* by M. J. Weinstein Released to public domain 1-Jan-89
*
* Because I have heard that this feature (opendir, readdir, closedir)
* it so useful for programmers coming from UNIX or attempting to port
* UNIX code, and because it is reasonably light weight, I have included
* it in the Mingw32 package. I have also added an implementation of
* rewinddir, seekdir and telldir.
* - Colin Peters <colin@bird.fu.is.saga-u.ac.jp>
*
* This code is distributed in the hope that is will be useful but
* WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
* DISCLAMED. This includeds but is not limited to warranties of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
*/
#include <io.h>
struct dirent
{
long d_ino; /* Always zero. */
unsigned short d_reclen; /* Always zero. */
unsigned short d_namlen; /* Length of name in d_name. */
char* d_name; /* File name. */
/* NOTE: The name in the dirent structure points to the name in the
* finddata_t structure in the DIR. */
};
/*
* This is an internal data structure. Good programmers will not use it
* except as an argument to one of the functions below.
*/
typedef struct
{
/* disk transfer area for this dir */
struct _finddata_t dd_dta;
/* dirent struct to return from dir (NOTE: this makes this thread
* safe as long as only one thread uses a particular DIR struct at
* a time) */
struct dirent dd_dir;
/* _findnext handle */
long dd_handle;
/*
* Status of search:
* 0 = not started yet (next entry to read is first entry)
* -1 = off the end
* positive = 0 based index of next entry
*/
short dd_stat;
/* given path for dir with search pattern (struct is extended) */
char dd_name[1];
} DIR;
/*
* dirent.c
*
* Derived from DIRLIB.C by Matt J. Weinstein
* This note appears in the DIRLIB.H
* DIRLIB.H by M. J. Weinstein Released to public domain 1-Jan-89
*
* Updated by Jeremy Bettis <jeremy@hksys.com>
* Significantly revised and rewinddir, seekdir and telldir added by Colin
* Peters <colin@fu.is.saga-u.ac.jp>
*/
#include <direct.h>
#include <errno.h>
#include <io.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#define win32_SUFFIX "*"
#define win32_SLASH "\\"
#ifndef S_ISDIR
#define S_ISDIR(m) ((m & S_IFMT) == S_IFDIR) /* is a directory */
#endif S_ISDIR
/*
opendir
Returns a pointer to a DIR structure appropriately filled in to begin
searching a directory.
*/
static DIR*
win32_opendir (const char *szPath)
{
DIR *nd;
struct _stat statDir;
errno = 0;
if (!szPath) {
errno = EFAULT;
return (DIR *) 0;
}
if (szPath[0] == '\0') {
errno = ENOTDIR;
return (DIR *) 0;
}
/* Attempt to determine if the given path really is a directory. */
if (_stat (szPath, &statDir)) {
/* Error, stat should have set an error value. */
return (DIR *) 0;
}
if (!S_ISDIR (statDir.st_mode)) {
/* Error, stat reports not a directory. */
errno = ENOTDIR;
return (DIR *) 0;
}
/* Allocate enough space to store DIR structure and the complete *
directory path given. */
nd = (DIR *) calloc (1, sizeof (DIR) + strlen (szPath)
+ strlen (win32_SLASH) + strlen (win32_SUFFIX));
if (!nd) {
/* Error, out of memory. */
errno = ENOMEM;
return (DIR *) 0;
}
/* Create the search expression. */
strcpy (nd->dd_name, szPath);
/* Add on a slash if the path does not end with one. */
if (nd->dd_name[0] != '\0' &&
nd->dd_name[strlen (nd->dd_name) - 1] != '/' &&
nd->dd_name[strlen (nd->dd_name) - 1] != '\\') {
strcat (nd->dd_name, win32_SLASH);
}
/* Add on the search pattern */
strcat (nd->dd_name, win32_SUFFIX);
/* Initialize handle to -1 so that a premature closedir doesn't try * to
call _findclose on it. */
nd->dd_handle = -1;
/* Initialize the status. */
nd->dd_stat = 0;
/* Initialize the dirent structure. ino and reclen are invalid under *
Win32, and name simply points at the appropriate part of the *
findfirst_t structure. */
nd->dd_dir.d_ino = 0;
nd->dd_dir.d_reclen = 0;
nd->dd_dir.d_namlen = 0;
nd->dd_dir.d_name = nd->dd_dta.name;
return nd;
}
/*
readdir
Return a pointer to a dirent structure filled with the information on the
next entry in the directory.
*/
static struct dirent *
win32_readdir (DIR * dirp)
{
errno = 0;
/* Check for valid DIR struct. */
if (!dirp) {
errno = EFAULT;
return (struct dirent *) 0;
}
if (dirp->dd_dir.d_name != dirp->dd_dta.name) {
/* The structure does not seem to be set up correctly. */
errno = EINVAL;
return (struct dirent *) 0;
}
if (dirp->dd_stat < 0) {
/* We have already returned all files in the directory * (or the
structure has an invalid dd_stat). */
return (struct dirent *) 0;
} else if (dirp->dd_stat == 0) {
/* We haven't started the search yet. */
/* Start the search */
dirp->dd_handle = _findfirst (dirp->dd_name, &(dirp->dd_dta));
if (dirp->dd_handle == -1) {
/* Whoops! Seems there are no files in that * directory. */
dirp->dd_stat = -1;
} else {
dirp->dd_stat = 1;
}
} else {
/* Get the next search entry. */
if (_findnext (dirp->dd_handle, &(dirp->dd_dta))) {
/* We are off the end or otherwise error. */
_findclose (dirp->dd_handle);
dirp->dd_handle = -1;
dirp->dd_stat = -1;
} else {
/* Update the status to indicate the correct * number. */
dirp->dd_stat++;
}
}
if (dirp->dd_stat > 0) {
/* Successfully got an entry. Everything about the file is * already
appropriately filled in except the length of the * file name. */
dirp->dd_dir.d_namlen = (unsigned short) strlen (dirp->dd_dir.d_name);
return &dirp->dd_dir;
}
return (struct dirent *) 0;
}
/*
closedir
Frees up resources allocated by opendir.
*/
static int
win32_closedir (DIR * dirp)
{
int rc;
errno = 0;
rc = 0;
if (!dirp) {
errno = EFAULT;
return -1;
}
if (dirp->dd_handle != -1) {
rc = _findclose (dirp->dd_handle);
}
/* Delete the dir structure. */
free (dirp);
return rc;
}
/*
rewinddir
Return to the beginning of the directory "stream". We simply call findclose
and then reset things like an opendir.
*/
static void
win32_rewinddir (DIR * dirp)
{
errno = 0;
if (!dirp) {
errno = EFAULT;
return;
}
if (dirp->dd_handle != -1) {
_findclose (dirp->dd_handle);
}
dirp->dd_handle = -1;
dirp->dd_stat = 0;
}
/*
telldir
Returns the "position" in the "directory stream" which can be used with
seekdir to go back to an old entry. We simply return the value in stat.
*/
static long
win32_telldir (DIR * dirp)
{
errno = 0;
if (!dirp) {
errno = EFAULT;
return -1;
}
return dirp->dd_stat;
}
/*
seekdir
Seek to an entry previously returned by telldir. We rewind the directory
and call readdir repeatedly until either dd_stat is the position number
or -1 (off the end). This is not perfect, in that the directory may
have changed while we weren't looking. But that is probably the case with
any such system.
*/
static void
win32_seekdir (DIR * dirp, long lPos)
{
errno = 0;
if (!dirp) {
errno = EFAULT;
return;
}
if (lPos < -1) {
/* Seeking to an invalid position. */
errno = EINVAL;
return;
} else if (lPos == -1) {
/* Seek past end. */
if (dirp->dd_handle != -1) {
_findclose (dirp->dd_handle);
}
dirp->dd_handle = -1;
dirp->dd_stat = -1;
} else {
/* Rewind and read forward to the appropriate index. */
win32_rewinddir (dirp);
while ((dirp->dd_stat < lPos) && win32_readdir (dirp));
}
}
#else
#define USE_DIRENT 0
#define _zzip_opendir(_N_) 0
#define _zzip_readdir(_D_) 0
#define _zzip_closedir(_D_) /* omit return code */
#define _zzip_rewinddir(_D_)
#define _zzip_telldir(_D_) 0
#define _zzip_seekdir(_D_,_V_) /* omit return code */
#define _zzip_DIR void*
/* end of DIRENT implementation */
#endif
/* once */
#endif
|