+++ /dev/null
-/*
- * dirent.c
- * This file has no copyright assigned and is placed in the Public Domain.
- * This file is a part of the mingw-runtime package.
- * No warranty is given; refer to the file DISCLAIMER within the package.
- *
- * 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>
- *
- */
-#ifdef _MSC_VER
-
-#include <stdlib.h>
-#include <errno.h>
-#include <string.h>
-#include <io.h>
-#include <direct.h>
-#include "w32_dirent.h"
-
-#define WIN32_LEAN_AND_MEAN
-#include <windows.h> /* for GetFileAttributes */
-
-#define SUFFIX "*"
-#define SLASH "\\"
-
-/*
- * opendir
- *
- * Returns a pointer to a DIR structure appropriately filled in to begin
- * searching a directory.
- */
-DIR * opendir (const char *szPath)
-{
- DIR *nd;
- unsigned int rc;
- char szFullPath[MAX_PATH];
-
- 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. */
- rc = GetFileAttributes (szPath);
- if (rc == (unsigned int)-1)
- {
- /* call GetLastError for more error info */
- errno = ENOENT;
- return (DIR *) 0;
- }
- if (!(rc & FILE_ATTRIBUTE_DIRECTORY))
- {
- /* Error, entry exists but not a directory. */
- errno = ENOTDIR;
- return (DIR *) 0;
- }
-
- /* Make an absolute pathname. */
- _fullpath (szFullPath, szPath, MAX_PATH);
-
- /* Allocate enough space to store DIR structure and the complete
- * directory path given. */
- nd = (DIR *) malloc (sizeof (DIR) + (strlen (szFullPath)
- + strlen (SLASH)
- + strlen (SUFFIX) + 1)
- * sizeof (char));
-
- if (!nd)
- {
- /* Error, out of memory. */
- errno = ENOMEM;
- return (DIR *) 0;
- }
-
- /* Create the search expression. */
- strcpy (nd->dd_name, szFullPath);
-
- /* Add on a slash if the path does not end with one. */
- if (nd->dd_name[0] != ('\0')
- && strrchr (nd->dd_name, ('/')) != nd->dd_name
- + strlen (nd->dd_name) - 1
- && strrchr (nd->dd_name, ('\\')) != nd->dd_name
- + strlen (nd->dd_name) - 1)
- {
- strcat (nd->dd_name, SLASH);
- }
-
- /* Add on the search pattern */
- strcat (nd->dd_name, 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 structure. */
- nd->dd_dir.d_ino = 0;
- nd->dd_dir.d_reclen = 0;
- nd->dd_dir.d_namlen = 0;
- memset (nd->dd_dir.d_name, 0, FILENAME_MAX);
-
- return nd;
-}
-
-
-/*
- * readdir
- *
- * Return a pointer to a dirent structure filled with the information on the
- * next entry in the directory.
- */
-struct dirent *
-readdir (DIR * dirp)
-{
- errno = 0;
-
- /* Check for valid DIR struct. */
- if (!dirp)
- {
- errno = EFAULT;
- 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 = (long)_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.
- _findnext sets errno to ENOENT if no more file
- Undo this. */
- DWORD winerr = GetLastError ();
- if (winerr == ERROR_NO_MORE_FILES)
- errno = 0;
- _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_dta.name);
- strcpy (dirp->dd_dir.d_name, dirp->dd_dta.name);
- return &dirp->dd_dir;
- }
-
- return (struct dirent *) 0;
-}
-
-
-/*
- * closedir
- *
- * Frees up resources allocated by opendir.
- */
-int
-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.
- */
-void
-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.
- */
-long
-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.
- */
-void
-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. */
- rewinddir (dirp);
-
- while ((dirp->dd_stat < lPos) && readdir (dirp))
- ;
- }
-}
-
-#else
-
-int _utk_w32_dirent_c_shut_up_stupid_compiler_warning;
-
-#endif /* WIN32 */
projects / dosdemo / blobdiff