Update win32 dirent.h implementation and use header instead of static library

6 files changed, 684 insertions, 461 deletions

diff --git a/src/dirent/dirent-win32.c b/src/dirent/dirent-win32.c
deleted file mode 100644
index 273c6732..00000000
--- a/src/dirent/dirent-win32.c
+++ /dev/null
@@ -1,199 +0,0 @@
-/*****************************************************************************
- * dirent.h - dirent API for Microsoft Visual Studio
- *
- * Copyright (C) 2006 Toni Ronkko
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * ``Software''), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL TONI RONKKO BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- * Dec 15, 2009, John Cunningham
- * Added rewinddir member function
- *
- * Jan 18, 2008, Toni Ronkko
- * Using FindFirstFileA and WIN32_FIND_DATAA to avoid converting string
- * between multi-byte and unicode representations.  This makes the
- * code simpler and also allows the code to be compiled under MingW.  Thanks
- * to Azriel Fasten for the suggestion.
- *
- * Mar 4, 2007, Toni Ronkko
- * Bug fix: due to the strncpy_s() function this file only compiled in
- * Visual Studio 2005.  Using the new string functions only when the
- * compiler version allows.
- *
- * Nov  2, 2006, Toni Ronkko
- * Major update: removed support for Watcom C, MS-DOS and Turbo C to
- * simplify the file, updated the code to compile cleanly on Visual
- * Studio 2005 with both unicode and multi-byte character strings,
- * removed rewinddir() as it had a bug.
- *
- * Aug 20, 2006, Toni Ronkko
- * Removed all remarks about MSVC 1.0, which is antiqued now.  Simplified
- * comments by removing SGML tags.
- *
- * May 14 2002, Toni Ronkko
- * Embedded the function definitions directly to the header so that no
- * source modules need to be included in the Visual Studio project.  Removed
- * all the dependencies to other projects so that this very header can be
- * used independently.
- *
- * May 28 1998, Toni Ronkko
- * First version.
- *****************************************************************************/
-
-#include "dirent-win32.h"
-
-/* Use the new safe string functions introduced in Visual Studio 2005 */
-#if defined(_MSC_VER) && _MSC_VER >= 1400
-# define STRNCPY(dest,src,size) strncpy_s((dest),(size),(src),_TRUNCATE)
-#else
-# define STRNCPY(dest,src,size) strncpy((dest),(src),(size))
-#endif
-
-
-/*****************************************************************************
- * Open directory stream DIRNAME for read and return a pointer to the
- * internal working area that is used to retrieve individual directory
- * entries.
- */
-DIR *opendir(const char *dirname)
-{
-   DIR *dirp;
-   assert (dirname != NULL);
-   assert (strlen (dirname) < MAX_PATH);
-
-   /* construct new DIR structure */
-   dirp = (DIR*) malloc (sizeof (struct DIR));
-   if (dirp != NULL) {
-      char *p;
-
-      /* take directory name... */
-      STRNCPY (dirp->patt, dirname, sizeof(dirp->patt));
-      dirp->patt[MAX_PATH] = '\0';
-
-      /* ... and append search pattern to it */
-      p = strchr (dirp->patt, '\0');
-      if (dirp->patt < p  &&  *(p-1) != '\\'  &&  *(p-1) != ':') {
-         *p++ = '\\';
-      }
-      *p++ = '*';
-      *p = '\0';
-
-      /* open stream and retrieve first file */
-      dirp->search_handle = FindFirstFileA (dirp->patt, &dirp->current.data);
-      if (dirp->search_handle == INVALID_HANDLE_VALUE) {
-         /* invalid search pattern? */
-         free (dirp);
-         return NULL;
-      }
-
-      /* there is an un-processed directory entry in memory now */
-      dirp->cached = 1;
-   }
-
-   return dirp;
-}
-
-
-/*****************************************************************************
- * Read a directory entry, and return a pointer to a dirent structure
- * containing the name of the entry in d_name field.  Individual directory
- * entries returned by this very function include regular files,
- * sub-directories, pseudo-directories "." and "..", but also volume labels,
- * hidden files and system files may be returned.
- */
-struct dirent *readdir(DIR *dirp)
-{
-   assert (dirp != NULL);
-
-   if (dirp->search_handle == INVALID_HANDLE_VALUE) {
-      /* directory stream was opened/rewound incorrectly or ended normally */
-      return NULL;
-   }
-
-   /* get next directory entry */
-   if (dirp->cached != 0) {
-      /* a valid directory entry already in memory */
-      dirp->cached = 0;
-   } else {
-      /* read next directory entry from disk */
-      if (FindNextFileA (dirp->search_handle, &dirp->current.data) == FALSE) {
-         /* the very last file has been processed or an error occured */
-         FindClose (dirp->search_handle);
-         dirp->search_handle = INVALID_HANDLE_VALUE;
-         return NULL;
-      }
-   }
-
-   /* copy as a multibyte character string */
-   STRNCPY ( dirp->current.d_name,
-             dirp->current.data.cFileName,
-             sizeof(dirp->current.d_name) );
-   dirp->current.d_name[MAX_PATH] = '\0';
-
-   return &dirp->current;
-}
-
-
-/*****************************************************************************
- * Close directory stream opened by opendir() function.  Close of the
- * directory stream invalidates the DIR structure as well as any previously
- * read directory entry.
- */
-int closedir(DIR *dirp)
-{
-   assert (dirp != NULL);
-
-   /* release search handle */
-   if (dirp->search_handle != INVALID_HANDLE_VALUE) {
-      FindClose (dirp->search_handle);
-      dirp->search_handle = INVALID_HANDLE_VALUE;
-   }
-
-   /* release directory handle */
-   free (dirp);
-   return 0;
-}
-
-
-/*****************************************************************************
- * Resets the position of the directory stream to which dirp refers to the
- * beginning of the directory. It also causes the directory stream to refer
- * to the current state of the corresponding directory, as a call to opendir()
- * would have done. If dirp does not refer to a directory stream, the effect
- * is undefined.
- */
-void rewinddir(DIR* dirp)
-{
-   /* release search handle */
-   if (dirp->search_handle != INVALID_HANDLE_VALUE) {
-      FindClose (dirp->search_handle);
-      dirp->search_handle = INVALID_HANDLE_VALUE;
-   }
-
-   /* open new search handle and retrieve first file */
-   dirp->search_handle = FindFirstFileA (dirp->patt, &dirp->current.data);
-   if (dirp->search_handle == INVALID_HANDLE_VALUE) {
-      /* invalid search pattern? */
-      free (dirp);
-      return;
-   }
-
-   /* there is an un-processed directory entry in memory now */
-   dirp->cached = 1;
-}
diff --git a/src/dirent/dirent-win32.h b/src/dirent/dirent-win32.h
index cbb753e6..a61f7b6a 100644
--- a/src/dirent/dirent-win32.h
+++ b/src/dirent/dirent-win32.h
@@ -1,28 +1,695 @@
+/*
+ * dirent.h - dirent API for Microsoft Visual Studio
+ *
+ * Copyright (C) 2006-2012 Toni Ronkko
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * ``Software''), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL TONI RONKKO BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ *
+ * Version 1.12.1, Oct 1 2012, Toni Ronkko
+ * Bug fix: renamed wide-character DIR structure _wDIR to _WDIR (with
+ * capital W) in order to maintain compatibility with MingW.
+ *
+ * Version 1.12, Sep 30 2012, Toni Ronkko
+ * Define PATH_MAX and NAME_MAX.
+ *
+ * Added wide-character variants _wDIR, _wdirent, _wopendir(),
+ * _wreaddir(), _wclosedir() and _wrewinddir().  Thanks to Edgar Buerkle
+ * and Jan Nijtmans for ideas and code.
+ *
+ * Do not include windows.h.  This allows dirent.h to be integrated more
+ * easily into programs using winsock.  Thanks to Fernando Azaldegui.
+ *
+ * Version 1.11, Mar 15, 2011, Toni Ronkko
+ * Defined FILE_ATTRIBUTE_DEVICE for MSVC 6.0.
+ *
+ * Version 1.10, Aug 11, 2010, Toni Ronkko
+ * Added d_type and d_namlen fields to dirent structure.  The former is
+ * especially useful for determining whether directory entry represents a
+ * file or a directory.  For more information, see
+ * http://www.delorie.com/gnu/docs/glibc/libc_270.html
+ *
+ * Improved conformance to the standards.  For example, errno is now set
+ * properly on failure and assert() is never used.  Thanks to Peter Brockam
+ * for suggestions.
+ *
+ * Fixed a bug in rewinddir(): when using relative directory names, change
+ * of working directory no longer causes rewinddir() to fail.
+ *
+ * Version 1.9, Dec 15, 2009, John Cunningham
+ * Added rewinddir member function
+ *
+ * Version 1.8, Jan 18, 2008, Toni Ronkko
+ * Using FindFirstFileA and WIN32_FIND_DATAA to avoid converting string
+ * between multi-byte and unicode representations.  This makes the
+ * code simpler and also allows the code to be compiled under MingW.  Thanks
+ * to Azriel Fasten for the suggestion.
+ *
+ * Mar 4, 2007, Toni Ronkko
+ * Bug fix: due to the strncpy_s() function this file only compiled in
+ * Visual Studio 2005.  Using the new string functions only when the
+ * compiler version allows.
+ *
+ * Nov  2, 2006, Toni Ronkko
+ * Major update: removed support for Watcom C, MS-DOS and Turbo C to
+ * simplify the file, updated the code to compile cleanly on Visual
+ * Studio 2005 with both unicode and multi-byte character strings,
+ * removed rewinddir() as it had a bug.
+ *
+ * Aug 20, 2006, Toni Ronkko
+ * Removed all remarks about MSVC 1.0, which is antiqued now.  Simplified
+ * comments by removing SGML tags.
+ *
+ * May 14 2002, Toni Ronkko
+ * Embedded the function definitions directly to the header so that no
+ * source modules need to be included in the Visual Studio project.  Removed
+ * all the dependencies to other projects so that this header file can be
+ * used independently.
+ *
+ * May 28 1998, Toni Ronkko
+ * First version.
+ *****************************************************************************/
 #ifndef DIRENT_H
 #define DIRENT_H
 
-#include <windows.h>
+#if !defined(_68K_) && !defined(_MPPC_) && !defined(_X86_) && !defined(_IA64_) && !defined(_AMD64_) && defined(_M_IX86)
+#define _X86_
+#endif
+#include <stdio.h>
+#include <stdarg.h>
+#include <windef.h>
+#include <winbase.h>
+#include <wchar.h>
+#include <winnls.h>
 #include <string.h>
-#include <assert.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
 
-typedef struct dirent
+/* Windows 8 wide-character string functions */
+#if (_WIN32_WINNT >= 0x0602)
+#   include <stringapiset.h>
+#endif
+
+/* Entries missing from MSVC 6.0 */
+#if !defined(FILE_ATTRIBUTE_DEVICE)
+# define FILE_ATTRIBUTE_DEVICE 0x40
+#endif
+
+/* File type and permission flags for stat() */
+#if defined(_MSC_VER)  &&  !defined(S_IREAD)
+#   define S_IFMT   _S_IFMT                     /* File type mask */
+#   define S_IFDIR  _S_IFDIR                    /* Directory */
+#   define S_IFCHR  _S_IFCHR                    /* Character device */
+#   define S_IFFIFO _S_IFFIFO                   /* Pipe */
+#   define S_IFREG  _S_IFREG                    /* Regular file */
+#   define S_IREAD  _S_IREAD                    /* Read permission */
+#   define S_IWRITE _S_IWRITE                   /* Write permission */
+#   define S_IEXEC  _S_IEXEC                    /* Execute permission */
+#endif
+#define S_IFBLK   0                             /* Block device */
+#define S_IFLNK   0                             /* Link */
+#define S_IFSOCK  0                             /* Socket */
+
+#if defined(_MSC_VER)
+#   define S_IRUSR  S_IREAD                     /* Read user */
+#   define S_IWUSR  S_IWRITE                    /* Write user */
+#   define S_IXUSR  0                           /* Execute user */
+#   define S_IRGRP  0                           /* Read group */
+#   define S_IWGRP  0                           /* Write group */
+#   define S_IXGRP  0                           /* Execute group */
+#   define S_IROTH  0                           /* Read others */
+#   define S_IWOTH  0                           /* Write others */
+#   define S_IXOTH  0                           /* Execute others */
+#endif
+
+/* Indicates that d_type field is available in dirent structure */
+#define _DIRENT_HAVE_D_TYPE
+
+/* File type flags for d_type */
+#define DT_UNKNOWN  0
+#define DT_REG      S_IFREG
+#define DT_DIR      S_IFDIR
+#define DT_FIFO     S_IFFIFO
+#define DT_SOCK     S_IFSOCK
+#define DT_CHR      S_IFCHR
+#define DT_BLK      S_IFBLK
+
+/* Macros for converting between st_mode and d_type */
+#define IFTODT(mode) ((mode) & S_IFMT)
+#define DTTOIF(type) (type)
+
+/*
+ * File type macros.  Note that block devices, sockets and links cannot be
+ * distinguished on Windows and the macros S_ISBLK, S_ISSOCK and S_ISLNK are
+ * only defined for compatibility.  These macros should always return false
+ * on Windows.
+ */
+#define	S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFFIFO)
+#define	S_ISDIR(mode)  (((mode) & S_IFMT) == S_IFDIR)
+#define	S_ISREG(mode)  (((mode) & S_IFMT) == S_IFREG)
+#define	S_ISLNK(mode)  (((mode) & S_IFMT) == S_IFLNK)
+#define	S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
+#define	S_ISCHR(mode)  (((mode) & S_IFMT) == S_IFCHR)
+#define	S_ISBLK(mode)  (((mode) & S_IFMT) == S_IFBLK)
+
+/* For compatiblity with Unix */
+#if !defined(PATH_MAX)
+#   define PATH_MAX MAX_PATH
+#endif
+#if !defined(FILENAME_MAX)
+#   define FILENAME_MAX MAX_PATH
+#endif
+#if !defined(NAME_MAX)
+#   define NAME_MAX FILENAME_MAX
+#endif
+
+/* Set errno variable */
+#if defined(_MSC_VER)
+#define DIRENT_SET_ERRNO(x) _set_errno (x)
+#else
+#define DIRENT_SET_ERRNO(x) (errno = (x))
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Wide-character versions */
+struct _wdirent {
+    long d_ino;                                 /* Always zero */
+    unsigned short d_reclen;                    /* Structure size */
+    size_t d_namlen;                            /* Length of name without \0 */
+    int d_type;                                 /* File type */
+    wchar_t d_name[PATH_MAX + 1];               /* File name */
+};
+typedef struct _wdirent _wdirent;
+
+struct _WDIR {
+    struct _wdirent ent;                        /* Current directory entry */
+    WIN32_FIND_DATAW find_data;                 /* Private file data */
+    int cached;                                 /* True if data is valid */
+    HANDLE handle;                              /* Win32 search handle */
+    wchar_t *patt;                              /* Initial directory name */
+};
+typedef struct _WDIR _WDIR;
+
+static _WDIR *_wopendir (const wchar_t *dirname);
+static struct _wdirent *_wreaddir (_WDIR *dirp);
+static int _wclosedir (_WDIR *dirp);
+static void _wrewinddir (_WDIR* dirp);
+
+/* For compatibility with Symbian */
+#define wdirent _wdirent
+#define WDIR _WDIR
+#define wopendir _wopendir
+#define wreaddir _wreaddir
+#define wclosedir _wclosedir
+#define wrewinddir _wrewinddir
+
+
+/* Multi-byte character versions */
+struct dirent {
+    long d_ino;                                 /* Always zero */
+    unsigned short d_reclen;                    /* Structure size */
+    size_t d_namlen;                            /* Length of name without \0 */
+    int d_type;                                 /* File type */
+    char d_name[PATH_MAX + 1];                  /* File name */
+};
+typedef struct dirent dirent;
+
+struct DIR {
+    struct dirent ent;
+    struct _WDIR *wdirp;
+};
+typedef struct DIR DIR;
+
+static DIR *opendir (const char *dirname);
+static struct dirent *readdir (DIR *dirp);
+static int closedir (DIR *dirp);
+static void rewinddir (DIR* dirp);
+
+
+/*
+ * Open directory stream DIRNAME for read and return a pointer to the
+ * internal working area that is used to retrieve individual directory
+ * entries.
+ */
+static _WDIR*
+_wopendir(
+    const wchar_t *dirname)
+{
+    _WDIR *dirp = NULL;
+    int error = 0;
+
+    /* Allocate new _WDIR structure */
+    dirp = (_WDIR*) malloc (sizeof (struct _WDIR));
+    if (dirp != NULL) {
+        DWORD n;
+
+        /* Reset _WDIR structure */
+        dirp->handle = INVALID_HANDLE_VALUE;
+        dirp->patt = NULL;
+
+        /* Compute the length of full path plus zero terminator */
+        n = GetFullPathNameW (dirname, 0, NULL, NULL);
+
+        /* Allocate room for full path and search patterns */
+        dirp->patt = (wchar_t*) malloc (sizeof (wchar_t) * n + 16);
+        if (dirp->patt) {
+
+            /*
+             * Convert relative directory name to an absolute one.  This
+             * allows rewinddir() to function correctly when the current
+             * working directory is changed between opendir() and rewinddir().
+             */
+            n = GetFullPathNameW (dirname, n, dirp->patt, NULL);
+            if (n > 0) {
+                wchar_t *p;
+
+                /* Append search pattern \* to the directory name */
+                p = dirp->patt + n;
+                if (dirp->patt < p) {
+                    switch (p[-1]) {
+                    case '\\':
+                    case '/':
+                    case ':':
+                        /* Directory ends in path separator, e.g. c:\temp\ */
+                        /*NOP*/;
+                        break;
+
+                    default:
+                        /* Directory name doesn't end in path separator */
+                        *p++ = '\\';
+                    }
+                }
+                *p++ = '*';
+                *p = '\0';
+
+                /* Open directory stream and retrieve the first entry */
+                dirp->handle = FindFirstFileW (dirp->patt, &dirp->find_data);
+                if (dirp->handle != INVALID_HANDLE_VALUE) {
+
+                    /* Directory entry is now waiting in memory */
+                    dirp->cached = 1;
+
+                } else {
+                    /* Search pattern is not a directory name? */
+                    DIRENT_SET_ERRNO (ENOENT);
+                    error = 1;
+                }
+
+            } else {
+                /* Cannot convert directory name to wide character string */
+                DIRENT_SET_ERRNO (ENOENT);
+                error = 1;
+            }
+
+        } else {
+            /* Cannot allocate memory for search pattern */
+            error = 1;
+        }
+
+    } else {
+        /* Cannot allocate _WDIR structure */
+        error = 1;
+    }
+
+    /* Clean up in case of error */
+    if (error  &&  dirp) {
+        _wclosedir (dirp);
+        dirp = NULL;
+    }
+
+    return dirp;
+}
+
+/*
+ * Read next directory entry.  The directory entry is returned in dirent
+ * structure in the d_name field.  Individual directory entries returned by
+ * this function include regular files, sub-directories, pseudo-directories
+ * "." and ".." as well as volume labels, hidden files and system files.
+ */
+static struct _wdirent*
+_wreaddir(
+    _WDIR *dirp)
+{
+    DWORD attr;
+    errno_t error;
+
+    /* Get next directory entry */
+    if (dirp->cached != 0) {
+        /* A valid directory entry already in memory */
+        dirp->cached = 0;
+    } else {
+        /* Get the next directory entry from stream */
+        if (dirp->handle == INVALID_HANDLE_VALUE) {
+            return NULL;
+        }
+        if (FindNextFileW (dirp->handle, &dirp->find_data) == FALSE) {
+            /* The very last entry has been processed or an error occured */
+            FindClose (dirp->handle);
+            dirp->handle = INVALID_HANDLE_VALUE;
+            return NULL;
+        }
+    }
+
+    /* Copy file name as a wide-character string */
+    error = wcsncpy_s(
+        dirp->ent.d_name,                       /* Destination string */
+        PATH_MAX,                               /* Size of dest in words */
+        dirp->find_data.cFileName,              /* Source string */
+        PATH_MAX + 1);                          /* Max # of chars to copy */
+    if (!error) {
+
+        /* Compute the length of name */
+        dirp->ent.d_namlen = wcsnlen (dirp->ent.d_name, PATH_MAX);
+
+        /* Determine file type */
+        attr = dirp->find_data.dwFileAttributes;
+        if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
+            dirp->ent.d_type = DT_CHR;
+        } else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
+            dirp->ent.d_type = DT_DIR;
+        } else {
+            dirp->ent.d_type = DT_REG;
+        }
+
+        /* Reset dummy fields */
+        dirp->ent.d_ino = 0;
+        dirp->ent.d_reclen = sizeof (dirp->ent);
+
+    } else {
+
+        /* 
+         * Cannot copy file name from find_data to ent.  Construct a
+         * dummy _wdirent structure to pass error to caller.
+         */
+        dirp->ent.d_name[0] = '?';
+        dirp->ent.d_name[1] = '\0';
+        dirp->ent.d_namlen = 1;
+        dirp->ent.d_type = DT_UNKNOWN;
+        dirp->ent.d_ino = 0;
+        dirp->ent.d_reclen = 0;
+    }
+
+    return &dirp->ent;
+}
+
+/*
+ * Close directory stream opened by opendir() function.  This invalidates the
+ * DIR structure as well as any directory entry read previously by
+ * _wreaddir().
+ */
+static int
+_wclosedir(
+    _WDIR *dirp)
+{
+    int ok;
+    if (dirp) {
+
+        /* Release search handle */
+        if (dirp->handle != INVALID_HANDLE_VALUE) {
+            FindClose (dirp->handle);
+            dirp->handle = INVALID_HANDLE_VALUE;
+        }
+
+        /* Release search pattern */
+        if (dirp->patt) {
+            free (dirp->patt);
+            dirp->patt = NULL;
+        }
+
+        /* Release directory structure */
+        free (dirp);
+        ok = /*success*/0;
+
+    } else {
+        /* Invalid directory stream */
+        DIRENT_SET_ERRNO (EBADF);
+        ok = /*failure*/-1;
+    }
+    return ok;
+}
+
+/*
+ * Rewind directory stream such that _wreaddir() returns the very first
+ * file name again.
+ */
+static void
+_wrewinddir(
+    _WDIR* dirp)
+{
+    if (dirp != NULL) {
+        /* release search handle */
+        if (dirp->handle != INVALID_HANDLE_VALUE) {
+            FindClose (dirp->handle);
+        }
+
+        /* Open new search handle and retrieve the first directory entry */
+        dirp->handle = FindFirstFileW (dirp->patt, &dirp->find_data);
+        if (dirp->handle != INVALID_HANDLE_VALUE) {
+            /* a directory entry is now waiting in memory */
+            dirp->cached = 1;
+        } else {
+            /* Failed to re-open directory: no directory entry in memory */
+            dirp->cached = 0;
+        }
+    }
+}
+
+/* 
+ * Open directory stream using plain old C-string.
+ */
+static DIR*
+opendir(
+    const char *dirname) 
 {
-   char d_name[MAX_PATH + 1]; /* current dir entry (multi-byte char string) */
-   WIN32_FIND_DATAA data;     /* file attributes */
-}  dirent;
+    struct DIR *dirp;
+    errno_t error = 0;
+
+    /* Must have directory name */
+    if (dirname == NULL) {
+        DIRENT_SET_ERRNO (ENOENT);
+        return NULL;
+    }
+
+    /* Allocate memory for multi-byte string directory structures */
+    dirp = (DIR*) malloc (sizeof (struct DIR));
+    if (dirp) {
+        wchar_t wname[PATH_MAX + 1];
+        size_t n;
+
+        /* 
+         * Convert directory name to wide-character string.
+         *
+         * Be ware of the return schemantics of MultiByteToWideChar() --
+         * the function basically returns the number of characters written to
+         * output buffer or zero if the conversion fails.  However, the
+         * function does not necessarily zero-terminate the output
+         * buffer and may return 0xFFFD if the string contains invalid
+         * characters!
+         */
+        n = MultiByteToWideChar(
+                CP_ACP,                         /* Input code page */
+                MB_PRECOMPOSED,                 /* Conversion flags */
+                dirname,                        /* Input string */
+                -1,                             /* Length of input string */
+                wname,                          /* Output buffer */
+                PATH_MAX);                      /* Size of output buffer */
+        if (n > 0  &&  n < PATH_MAX) {
+
+            /* Zero-terminate output buffer */
+            wname[n] = '\0';
+
+            /* Open directory stream with wide-character string file name */
+            dirp->wdirp = _wopendir (wname);
+            if (dirp->wdirp) {
+
+                /* Initialize directory structure */
+                dirp->ent.d_name[0] = '\0';
+                dirp->ent.d_namlen = 0;
+                dirp->ent.d_type = 0;
+                dirp->ent.d_ino = 0;
+                dirp->ent.d_reclen = 0;
+
+
+            } else {
+                /* Failed to open directory stream */
+                error = 1;
+            }
+
+        } else {
+            /* 
+             * Cannot convert file name to wide-character string.  This
+             * occurs if the string contains invalid multi-byte sequences or
+             * the output buffer is too small to contain the resulting
+             * string.
+             */
+            error = 1;
+        }
+
+    } else {
+        /* Cannot allocate DIR structure */
+        error = 1;
+    }
+
+    /* Clean up in case of error */
+    if (error  &&  dirp) {
+        free (dirp);
+        dirp = NULL;
+    }
+
+    return dirp;
+}
 
-typedef struct DIR
+/*
+ * Read next directory entry.
+ *
+ * When working with console, please note that file names returned by
+ * readdir() are represented in the default ANSI code page while the
+ * console typically runs on another code page.  Thus, non-ASCII characters
+ * will not usually display correctly.  The problem can be fixed in two ways:
+ * (1) change the character set of console to 1252 using chcp utility and use
+ * Lucida Console font, or (2) always use _cprintf function when writing to
+ * console.  The _cprinf() will re-encode ANSI strings to the console code
+ * page so non-ASCII characters will display correcly.
+ */
+static struct dirent*
+readdir(
+    DIR *dirp) 
 {
-   dirent current;            /* Current directory entry */
-   int    cached;             /* Indicates un-processed entry in memory */
-   HANDLE search_handle;      /* File search handle */
-   char   patt[MAX_PATH + 3]; /* search pattern (3 = pattern + "\\*\0") */
-} DIR;
+    struct dirent *p;
+    struct _wdirent *wp;
 
-/* Forward declarations */
-DIR *opendir (const char *dirname);
-struct dirent *readdir (DIR *dirp);
-int closedir (DIR *dirp);
-void rewinddir(DIR* dirp);
+    /* Read next directory entry using wide-character string functions */
+    wp = _wreaddir (dirp->wdirp);
+    if (wp) {
+        size_t n;
 
+        /* 
+         * Convert file name to multi-byte string.
+         *
+         * Be ware of the return schemantics of WideCharToMultiByte() --
+         * the function basically returns the number of bytes
+         * written to output buffer or zero if the conversion fails.
+         * However, the function does not necessarily zero-terminate the
+         * buffer and it may even return 0xFFFD the string contains
+         * invalid characters!
+         */
+        n = WideCharToMultiByte(
+                CP_ACP,                         /* Output code page */
+                0,                              /* Conversion flags */
+                wp->d_name,                     /* Input string */
+                wp->d_namlen,                   /* Length of input string */
+                dirp->ent.d_name,               /* Output buffer */
+                PATH_MAX,                       /* Size of output buffer */
+                NULL,                           /* Replacement character */
+                NULL);                          /* If chars were replaced */
+        if (n > 0  &&  n < PATH_MAX) {
+
+            /* Zero-terminate buffer */
+            dirp->ent.d_name[n] = '\0';
+
+            /* Initialize directory entry for return */
+            p = &dirp->ent;
+
+            /* Compute length */
+            p->d_namlen = strnlen (dirp->ent.d_name, PATH_MAX);
+
+            /* Copy file attributes */
+            p->d_type = wp->d_type;
+
+            /* Reset dummy fields */
+            p->d_ino = 0;
+            p->d_reclen = sizeof (dirp->ent);
+
+
+        } else {
+
+            /* 
+             * Cannot convert file name to multi-byte string so construct
+             * an errornous directory entry and return that.  Note that
+             * we cannot return NULL as that would stop the processing
+             * of directory entries completely.
+             */
+            p = &dirp->ent;
+            p->d_name[0] = '?';
+            p->d_name[1] = '\0';
+            p->d_namlen = 1;
+            p->d_type = DT_UNKNOWN;
+            p->d_ino = 0;
+            p->d_reclen = 0;
+
+        }
+
+    } else {
+    
+        /* End of directory stream */
+        p = NULL;
+
+    }
+
+    return p;
+}
+
+/*
+ * Close directory stream.
+ */
+static int
+closedir(
+    DIR *dirp) 
+{
+    int ok;
+    if (dirp) {
+
+        /* Close wide-character directory stream */
+        ok = _wclosedir (dirp->wdirp);
+        dirp->wdirp = NULL;
+
+        /* Release multi-byte character version */
+        free (dirp);
+
+    } else {
+        /* Invalid directory stream */
+        DIRENT_SET_ERRNO (EBADF);
+        ok = /*failure*/-1;
+    }
+    return ok;
+}
+
+/*
+ * Rewind directory stream to beginning.
+ */
+static void
+rewinddir(
+    DIR* dirp) 
+{
+    /* Rewind wide-character string directory stream */
+    _wrewinddir (dirp->wdirp);
+}
+
+
+#ifdef __cplusplus
+}
+#endif
 #endif /*DIRENT_H*/
+
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deleted file mode 100644
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