4 * Derived from DIRLIB.C by Matt J. Weinstein
5 * This note appears in the DIRLIB.H
6 * DIRLIB.H by M. J. Weinstein Released to public domain 1-Jan-89
8 * Updated by Jeremy Bettis <jeremy@hksys.com>
9 * Significantly revised and rewinddir, seekdir and telldir added by Colin
10 * Peters <colin@fu.is.saga-u.ac.jp>
18 #include <crtdll/stdlib.h>
19 /* #include <crtdll/ctype.h> */
20 #include <crtdll/errno.h>
21 #include <crtdll/string.h>
22 #include <crtdll/dir.h>
23 #include <crtdll/direct.h>
24 #include <crtdll/sys/stat.h>
26 #include <crtdll/dirent.h>
30 #define streq(a,b) (strcmp(a,b)==0)
35 * Returns a pointer to a DIR structure appropriately filled in to begin
36 * searching a directory.
39 opendir(const char* szPath)
52 if (szPath[0] == '\0')
58 /* Attempt to determine if the given path really is a directory. */
59 if (_stat (szPath, &statDir))
61 /* Error, stat should have set an error value. */
65 if (!S_ISDIR(statDir.st_mode))
67 /* Error, stat reports not a directory. */
72 /* Allocate enough space to store DIR structure and the complete
73 * directory path given. */
74 nd = (DIR*) malloc (sizeof(DIR) + strlen(szPath) + strlen(SLASH) +
79 /* Error, out of memory. */
84 /* Create the search expression. */
85 strcpy(nd->dd_name, szPath);
87 /* Add on a slash if the path does not end with one. */
88 if (nd->dd_name[0] != '\0' &&
89 nd->dd_name[strlen(nd->dd_name)-1] != '/' &&
90 nd->dd_name[strlen(nd->dd_name)-1] != '\\')
92 strcat(nd->dd_name, SLASH);
95 /* Add on the search pattern */
96 strcat(nd->dd_name, SUFFIX);
98 /* Initialize handle to -1 so that a premature closedir doesn't try
99 * to call _findclose on it. */
102 /* Initialize the status. */
105 /* Initialize the dirent structure. ino and reclen are invalid under
106 * Win32, and name simply points at the appropriate part of the
107 * findfirst_t structure. */
108 nd->dd_dir.d_ino = 0;
109 nd->dd_dir.d_reclen = 0;
110 nd->dd_dir.d_namlen = 0;
111 nd->dd_dir.d_name = nd->dd_dta.name;
120 * Return a pointer to a dirent structure filled with the information on the
121 * next entry in the directory.
128 /* Check for valid DIR struct. */
132 return (struct dirent*) 0;
135 if (dirp->dd_dir.d_name != dirp->dd_dta.name)
137 /* The structure does not seem to be set up correctly. */
139 return (struct dirent*) 0;
142 if (dirp->dd_stat < 0)
144 /* We have already returned all files in the directory
145 * (or the structure has an invalid dd_stat). */
146 return (struct dirent *) 0;
148 else if (dirp->dd_stat == 0)
150 /* We haven't started the search yet. */
151 /* Start the search */
152 dirp->dd_handle = _findfirst(dirp->dd_name, &(dirp->dd_dta));
154 if (dirp->dd_handle == -1)
156 /* Whoops! Seems there are no files in that
167 /* Get the next search entry. */
168 if (_findnext(dirp->dd_handle, &(dirp->dd_dta)))
170 /* We are off the end or otherwise error. */
171 _findclose (dirp->dd_handle);
172 dirp->dd_handle = -1;
177 /* Update the status to indicate the correct
183 if (dirp->dd_stat > 0)
185 /* Successfully got an entry. Everything about the file is
186 * already appropriately filled in except the length of the
188 dirp->dd_dir.d_namlen = strlen(dirp->dd_dir.d_name);
189 return &dirp->dd_dir;
192 return (struct dirent*) 0;
199 * Frees up resources allocated by opendir.
215 if (dirp->dd_handle != -1)
217 rc = _findclose(dirp->dd_handle);
220 /* Delete the dir structure. */
229 * Return to the beginning of the directory "stream". We simply call findclose
230 * and then reset things like an opendir.
233 rewinddir (DIR* dirp)
243 if (dirp->dd_handle != -1)
245 _findclose(dirp->dd_handle);
248 dirp->dd_handle = -1;
255 * Returns the "position" in the "directory stream" which can be used with
256 * seekdir to go back to an old entry. We simply return the value in stat.
268 return dirp->dd_stat;
274 * Seek to an entry previously returned by telldir. We rewind the directory
275 * and call readdir repeatedly until either dd_stat is the position number
276 * or -1 (off the end). This is not perfect, in that the directory may
277 * have changed while we weren't looking. But that is probably the case with
281 seekdir (DIR* dirp, long lPos)
293 /* Seeking to an invalid position. */
300 if (dirp->dd_handle != -1)
302 _findclose (dirp->dd_handle);
304 dirp->dd_handle = -1;
309 /* Rewind and read forward to the appropriate index. */
312 while ((dirp->dd_stat < lPos) && readdir(dirp))