Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1416 insertions, 0 deletions

diff --git a/nsprpub/pr/src/md/windows/w95io.c b/nsprpub/pr/src/md/windows/w95io.c
new file mode 100644
index 0000000000..2ad52e19ba
--- /dev/null
+++ b/nsprpub/pr/src/md/windows/w95io.c
@@ -0,0 +1,1416 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Windows 95 IO module
+ *
+ * Assumes synchronous I/O.
+ *
+ */
+
+#include "primpl.h"
+#include <direct.h>
+#include <mbstring.h>
+#ifdef MOZ_UNICODE
+#include <wchar.h>
+#endif /* MOZ_UNICODE */
+
+struct _MDLock               _pr_ioq_lock;
+
+/*
+ * NSPR-to-NT access right mapping table for files.
+ */
+static DWORD fileAccessTable[] = {
+    FILE_GENERIC_READ,
+    FILE_GENERIC_WRITE,
+    FILE_GENERIC_EXECUTE
+};
+
+/*
+ * NSPR-to-NT access right mapping table for directories.
+ */
+static DWORD dirAccessTable[] = {
+    FILE_GENERIC_READ,
+    FILE_GENERIC_WRITE|FILE_DELETE_CHILD,
+    FILE_GENERIC_EXECUTE
+};
+
+static PRBool IsPrevCharSlash(const char *str, const char *current);
+
+void
+_PR_MD_INIT_IO()
+{
+    WORD WSAVersion = 0x0101;
+    WSADATA WSAData;
+    int err;
+
+    err = WSAStartup( WSAVersion, &WSAData );
+    PR_ASSERT(0 == err);
+
+#ifdef DEBUG
+    /* Doublecheck _pr_filetime_offset's hard-coded value is correct. */
+    {
+        SYSTEMTIME systime;
+        union {
+            PRTime prt;
+            FILETIME ft;
+        } filetime;
+        BOOL rv;
+
+        systime.wYear = 1970;
+        systime.wMonth = 1;
+        /* wDayOfWeek is ignored */
+        systime.wDay = 1;
+        systime.wHour = 0;
+        systime.wMinute = 0;
+        systime.wSecond = 0;
+        systime.wMilliseconds = 0;
+
+        rv = SystemTimeToFileTime(&systime, &filetime.ft);
+        PR_ASSERT(0 != rv);
+        PR_ASSERT(filetime.prt == _pr_filetime_offset);
+    }
+#endif /* DEBUG */
+
+    _PR_NT_InitSids();
+
+    _PR_MD_InitSockets();
+}
+
+PRStatus
+_PR_MD_WAIT(PRThread *thread, PRIntervalTime ticks)
+{
+    DWORD rv;
+
+    PRUint32 msecs = (ticks == PR_INTERVAL_NO_TIMEOUT) ?
+                     INFINITE : PR_IntervalToMilliseconds(ticks);
+    rv = WaitForSingleObject(thread->md.blocked_sema, msecs);
+    switch(rv)
+    {
+        case WAIT_OBJECT_0:
+            return PR_SUCCESS;
+        case WAIT_TIMEOUT:
+            _PR_THREAD_LOCK(thread);
+            if (thread->state == _PR_IO_WAIT) {
+                ;
+            } else {
+                if (thread->wait.cvar != NULL) {
+                    thread->wait.cvar = NULL;
+                    _PR_THREAD_UNLOCK(thread);
+                } else {
+                    /* The CVAR was notified just as the timeout
+                     * occurred.  This led to us being notified twice.
+                     * call WaitForSingleObject() to clear the semaphore.
+                     */
+                    _PR_THREAD_UNLOCK(thread);
+                    rv = WaitForSingleObject(thread->md.blocked_sema, 0);
+                    PR_ASSERT(rv == WAIT_OBJECT_0);
+                }
+            }
+            return PR_SUCCESS;
+        default:
+            return PR_FAILURE;
+    }
+}
+PRStatus
+_PR_MD_WAKEUP_WAITER(PRThread *thread)
+{
+    if ( _PR_IS_NATIVE_THREAD(thread) )
+    {
+        if (ReleaseSemaphore(thread->md.blocked_sema, 1, NULL) == FALSE) {
+            return PR_FAILURE;
+        }
+        else {
+            return PR_SUCCESS;
+        }
+    }
+}
+
+
+/* --- FILE IO ----------------------------------------------------------- */
+/*
+ *  _PR_MD_OPEN() -- Open a file
+ *
+ *  returns: a fileHandle
+ *
+ *  The NSPR open flags (osflags) are translated into flags for Win95
+ *
+ *  Mode seems to be passed in as a unix style file permissions argument
+ *  as in 0666, in the case of opening the logFile.
+ *
+ */
+PROsfd
+_PR_MD_OPEN(const char *name, PRIntn osflags, int mode)
+{
+    HANDLE file;
+    PRInt32 access = 0;
+    PRInt32 flags = 0;
+    PRInt32 flag6 = 0;
+
+    if (osflags & PR_SYNC) {
+        flag6 = FILE_FLAG_WRITE_THROUGH;
+    }
+
+    if (osflags & PR_RDONLY || osflags & PR_RDWR) {
+        access |= GENERIC_READ;
+    }
+    if (osflags & PR_WRONLY || osflags & PR_RDWR) {
+        access |= GENERIC_WRITE;
+    }
+
+    if ( osflags & PR_CREATE_FILE && osflags & PR_EXCL ) {
+        flags = CREATE_NEW;
+    }
+    else if (osflags & PR_CREATE_FILE) {
+        if (osflags & PR_TRUNCATE) {
+            flags = CREATE_ALWAYS;
+        }
+        else {
+            flags = OPEN_ALWAYS;
+        }
+    } else {
+        if (osflags & PR_TRUNCATE) {
+            flags = TRUNCATE_EXISTING;
+        }
+        else {
+            flags = OPEN_EXISTING;
+        }
+    }
+
+    file = CreateFileA(name,
+                       access,
+                       FILE_SHARE_READ|FILE_SHARE_WRITE,
+                       NULL,
+                       flags,
+                       flag6,
+                       NULL);
+    if (file == INVALID_HANDLE_VALUE) {
+        _PR_MD_MAP_OPEN_ERROR(GetLastError());
+        return -1;
+    }
+
+    return (PROsfd)file;
+}
+
+PROsfd
+_PR_MD_OPEN_FILE(const char *name, PRIntn osflags, int mode)
+{
+    HANDLE file;
+    PRInt32 access = 0;
+    PRInt32 flags = 0;
+    PRInt32 flag6 = 0;
+    SECURITY_ATTRIBUTES sa;
+    LPSECURITY_ATTRIBUTES lpSA = NULL;
+    PSECURITY_DESCRIPTOR pSD = NULL;
+    PACL pACL = NULL;
+
+    if (osflags & PR_CREATE_FILE) {
+        if (_PR_NT_MakeSecurityDescriptorACL(mode, fileAccessTable,
+                                             &pSD, &pACL) == PR_SUCCESS) {
+            sa.nLength = sizeof(sa);
+            sa.lpSecurityDescriptor = pSD;
+            sa.bInheritHandle = FALSE;
+            lpSA = &sa;
+        }
+    }
+
+    if (osflags & PR_SYNC) {
+        flag6 = FILE_FLAG_WRITE_THROUGH;
+    }
+
+    if (osflags & PR_RDONLY || osflags & PR_RDWR) {
+        access |= GENERIC_READ;
+    }
+    if (osflags & PR_WRONLY || osflags & PR_RDWR) {
+        access |= GENERIC_WRITE;
+    }
+
+    if ( osflags & PR_CREATE_FILE && osflags & PR_EXCL ) {
+        flags = CREATE_NEW;
+    }
+    else if (osflags & PR_CREATE_FILE) {
+        if (osflags & PR_TRUNCATE) {
+            flags = CREATE_ALWAYS;
+        }
+        else {
+            flags = OPEN_ALWAYS;
+        }
+    } else {
+        if (osflags & PR_TRUNCATE) {
+            flags = TRUNCATE_EXISTING;
+        }
+        else {
+            flags = OPEN_EXISTING;
+        }
+    }
+
+    file = CreateFileA(name,
+                       access,
+                       FILE_SHARE_READ|FILE_SHARE_WRITE,
+                       lpSA,
+                       flags,
+                       flag6,
+                       NULL);
+    if (lpSA != NULL) {
+        _PR_NT_FreeSecurityDescriptorACL(pSD, pACL);
+    }
+    if (file == INVALID_HANDLE_VALUE) {
+        _PR_MD_MAP_OPEN_ERROR(GetLastError());
+        return -1;
+    }
+
+    return (PROsfd)file;
+}
+
+PRInt32
+_PR_MD_READ(PRFileDesc *fd, void *buf, PRInt32 len)
+{
+    PRUint32 bytes;
+    int rv, err;
+
+    rv = ReadFile((HANDLE)fd->secret->md.osfd,
+                  (LPVOID)buf,
+                  len,
+                  &bytes,
+                  NULL);
+
+    if (rv == 0)
+    {
+        err = GetLastError();
+        /* ERROR_HANDLE_EOF can only be returned by async io */
+        PR_ASSERT(err != ERROR_HANDLE_EOF);
+        if (err == ERROR_BROKEN_PIPE) {
+            return 0;
+        }
+        else {
+            _PR_MD_MAP_READ_ERROR(err);
+            return -1;
+        }
+    }
+    return bytes;
+}
+
+PRInt32
+_PR_MD_WRITE(PRFileDesc *fd, const void *buf, PRInt32 len)
+{
+    PROsfd f = fd->secret->md.osfd;
+    PRInt32 bytes;
+    int rv;
+
+    rv = WriteFile((HANDLE)f,
+                   buf,
+                   len,
+                   &bytes,
+                   NULL );
+
+    if (rv == 0)
+    {
+        _PR_MD_MAP_WRITE_ERROR(GetLastError());
+        return -1;
+    }
+    return bytes;
+} /* --- end _PR_MD_WRITE() --- */
+
+PROffset32
+_PR_MD_LSEEK(PRFileDesc *fd, PROffset32 offset, PRSeekWhence whence)
+{
+    DWORD moveMethod;
+    PROffset32 rv;
+
+    switch (whence) {
+        case PR_SEEK_SET:
+            moveMethod = FILE_BEGIN;
+            break;
+        case PR_SEEK_CUR:
+            moveMethod = FILE_CURRENT;
+            break;
+        case PR_SEEK_END:
+            moveMethod = FILE_END;
+            break;
+        default:
+            PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+            return -1;
+    }
+
+    rv = SetFilePointer((HANDLE)fd->secret->md.osfd, offset, NULL, moveMethod);
+
+    /*
+     * If the lpDistanceToMoveHigh argument (third argument) is
+     * NULL, SetFilePointer returns 0xffffffff on failure.
+     */
+    if (-1 == rv) {
+        _PR_MD_MAP_LSEEK_ERROR(GetLastError());
+    }
+    return rv;
+}
+
+PROffset64
+_PR_MD_LSEEK64(PRFileDesc *fd, PROffset64 offset, PRSeekWhence whence)
+{
+    DWORD moveMethod;
+    LARGE_INTEGER li;
+    DWORD err;
+
+    switch (whence) {
+        case PR_SEEK_SET:
+            moveMethod = FILE_BEGIN;
+            break;
+        case PR_SEEK_CUR:
+            moveMethod = FILE_CURRENT;
+            break;
+        case PR_SEEK_END:
+            moveMethod = FILE_END;
+            break;
+        default:
+            PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+            return -1;
+    }
+
+    li.QuadPart = offset;
+    li.LowPart = SetFilePointer((HANDLE)fd->secret->md.osfd,
+                                li.LowPart, &li.HighPart, moveMethod);
+
+    if (0xffffffff == li.LowPart && (err = GetLastError()) != NO_ERROR) {
+        _PR_MD_MAP_LSEEK_ERROR(err);
+        li.QuadPart = -1;
+    }
+    return li.QuadPart;
+}
+
+/*
+ * This is documented to succeed on read-only files, but Win32's
+ * FlushFileBuffers functions fails with "access denied" in such a
+ * case.  So we only signal an error if the error is *not* "access
+ * denied".
+ */
+PRInt32
+_PR_MD_FSYNC(PRFileDesc *fd)
+{
+    /*
+     * From the documentation:
+     *
+     *     On Windows NT, the function FlushFileBuffers fails if hFile
+     *     is a handle to console output. That is because console
+     *     output is not buffered. The function returns FALSE, and
+     *     GetLastError returns ERROR_INVALID_HANDLE.
+     *
+     * On the other hand, on Win95, it returns without error.  I cannot
+     * assume that 0, 1, and 2 are console, because if someone closes
+     * System.out and then opens a file, they might get file descriptor
+     * 1.  An error on *that* version of 1 should be reported, whereas
+     * an error on System.out (which was the original 1) should be
+     * ignored.  So I use isatty() to ensure that such an error was due
+     * to this bogosity, and if it was, I ignore the error.
+     */
+
+    BOOL ok = FlushFileBuffers((HANDLE)fd->secret->md.osfd);
+
+    if (!ok) {
+        DWORD err = GetLastError();
+        if (err != ERROR_ACCESS_DENIED) {   // from winerror.h
+            _PR_MD_MAP_FSYNC_ERROR(err);
+            return -1;
+        }
+    }
+    return 0;
+}
+
+PRInt32
+_MD_CloseFile(PROsfd osfd)
+{
+    PRInt32 rv;
+
+    rv = (CloseHandle((HANDLE)osfd))?0:-1;
+    if (rv == -1) {
+        _PR_MD_MAP_CLOSE_ERROR(GetLastError());
+    }
+    return rv;
+}
+
+
+/* --- DIR IO ------------------------------------------------------------ */
+#define GetFileFromDIR(d)       (d)->d_entry.cFileName
+#define FileIsHidden(d) ((d)->d_entry.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN)
+
+static void FlipSlashes(char *cp, size_t len)
+{
+    while (len-- > 0) {
+        if (cp[0] == '/') {
+            cp[0] = PR_DIRECTORY_SEPARATOR;
+        }
+        cp = _mbsinc(cp);
+    }
+} /* end FlipSlashes() */
+
+
+/*
+**
+** Local implementations of standard Unix RTL functions which are not provided
+** by the VC RTL.
+**
+*/
+
+PRInt32
+_PR_MD_CLOSE_DIR(_MDDir *d)
+{
+    if ( d ) {
+        if (FindClose(d->d_hdl)) {
+            d->magic = (PRUint32)-1;
+            return 0;
+        } else {
+            _PR_MD_MAP_CLOSEDIR_ERROR(GetLastError());
+            return -1;
+        }
+    }
+    PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+    return -1;
+}
+
+
+PRStatus
+_PR_MD_OPEN_DIR(_MDDir *d, const char *name)
+{
+    char filename[ MAX_PATH ];
+    size_t len;
+
+    len = strlen(name);
+    /* Need 5 bytes for \*.* and the trailing null byte. */
+    if (len + 5 > MAX_PATH) {
+        PR_SetError(PR_NAME_TOO_LONG_ERROR, 0);
+        return PR_FAILURE;
+    }
+    strcpy(filename, name);
+
+    /*
+     * If 'name' ends in a slash or backslash, do not append
+     * another backslash.
+     */
+    if (IsPrevCharSlash(filename, filename + len)) {
+        len--;
+    }
+    strcpy(&filename[len], "\\*.*");
+    FlipSlashes( filename, strlen(filename) );
+
+    d->d_hdl = FindFirstFileA( filename, &(d->d_entry) );
+    if ( d->d_hdl == INVALID_HANDLE_VALUE ) {
+        _PR_MD_MAP_OPENDIR_ERROR(GetLastError());
+        return PR_FAILURE;
+    }
+    d->firstEntry = PR_TRUE;
+    d->magic = _MD_MAGIC_DIR;
+    return PR_SUCCESS;
+}
+
+char *
+_PR_MD_READ_DIR(_MDDir *d, PRIntn flags)
+{
+    PRInt32 err;
+    BOOL rv;
+    char *fileName;
+
+    if ( d ) {
+        while (1) {
+            if (d->firstEntry) {
+                d->firstEntry = PR_FALSE;
+                rv = 1;
+            } else {
+                rv = FindNextFileA(d->d_hdl, &(d->d_entry));
+            }
+            if (rv == 0) {
+                break;
+            }
+            fileName = GetFileFromDIR(d);
+            if ( (flags & PR_SKIP_DOT) &&
+                 (fileName[0] == '.') && (fileName[1] == '\0')) {
+                continue;
+            }
+            if ( (flags & PR_SKIP_DOT_DOT) &&
+                 (fileName[0] == '.') && (fileName[1] == '.') &&
+                 (fileName[2] == '\0')) {
+                continue;
+            }
+            if ( (flags & PR_SKIP_HIDDEN) && FileIsHidden(d)) {
+                continue;
+            }
+            return fileName;
+        }
+        err = GetLastError();
+        PR_ASSERT(NO_ERROR != err);
+        _PR_MD_MAP_READDIR_ERROR(err);
+        return NULL;
+    }
+    PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+    return NULL;
+}
+
+PRInt32
+_PR_MD_DELETE(const char *name)
+{
+    if (DeleteFileA(name)) {
+        return 0;
+    } else {
+        _PR_MD_MAP_DELETE_ERROR(GetLastError());
+        return -1;
+    }
+}
+
+void
+_PR_FileTimeToPRTime(const FILETIME *filetime, PRTime *prtm)
+{
+    PR_ASSERT(sizeof(FILETIME) == sizeof(PRTime));
+    CopyMemory(prtm, filetime, sizeof(PRTime));
+#if defined(__MINGW32__)
+    *prtm = (*prtm - _pr_filetime_offset) / 10LL;
+#else
+    *prtm = (*prtm - _pr_filetime_offset) / 10i64;
+#endif
+
+#ifdef DEBUG
+    /* Doublecheck our calculation. */
+    {
+        SYSTEMTIME systime;
+        PRExplodedTime etm;
+        PRTime cmp; /* for comparison */
+        BOOL rv;
+
+        rv = FileTimeToSystemTime(filetime, &systime);
+        PR_ASSERT(0 != rv);
+
+        /*
+         * PR_ImplodeTime ignores wday and yday.
+         */
+        etm.tm_usec = systime.wMilliseconds * PR_USEC_PER_MSEC;
+        etm.tm_sec = systime.wSecond;
+        etm.tm_min = systime.wMinute;
+        etm.tm_hour = systime.wHour;
+        etm.tm_mday = systime.wDay;
+        etm.tm_month = systime.wMonth - 1;
+        etm.tm_year = systime.wYear;
+        /*
+         * It is not well-documented what time zone the FILETIME's
+         * are in.  WIN32_FIND_DATA is documented to be in UTC (GMT).
+         * But BY_HANDLE_FILE_INFORMATION is unclear about this.
+         * By our best judgement, we assume that FILETIME is in UTC.
+         */
+        etm.tm_params.tp_gmt_offset = 0;
+        etm.tm_params.tp_dst_offset = 0;
+        cmp = PR_ImplodeTime(&etm);
+
+        /*
+         * SYSTEMTIME is in milliseconds precision, so we convert PRTime's
+         * microseconds to milliseconds before doing the comparison.
+         */
+        PR_ASSERT((cmp / PR_USEC_PER_MSEC) == (*prtm / PR_USEC_PER_MSEC));
+    }
+#endif /* DEBUG */
+}
+
+PRInt32
+_PR_MD_STAT(const char *fn, struct stat *info)
+{
+    PRInt32 rv;
+
+    rv = _stat(fn, (struct _stat *)info);
+    if (-1 == rv) {
+        /*
+         * Check for MSVC runtime library _stat() bug.
+         * (It's really a bug in FindFirstFile().)
+         * If a pathname ends in a backslash or slash,
+         * e.g., c:\temp\ or c:/temp/, _stat() will fail.
+         * Note: a pathname ending in a slash (e.g., c:/temp/)
+         * can be handled by _stat() on NT but not on Win95.
+         *
+         * We remove the backslash or slash at the end and
+         * try again.
+         */
+
+        size_t len = strlen(fn);
+        if (len > 0 && len <= _MAX_PATH
+            && IsPrevCharSlash(fn, fn + len)) {
+            char newfn[_MAX_PATH + 1];
+
+            strcpy(newfn, fn);
+            newfn[len - 1] = '\0';
+            rv = _stat(newfn, (struct _stat *)info);
+        }
+    }
+
+    if (-1 == rv) {
+        _PR_MD_MAP_STAT_ERROR(errno);
+    }
+    return rv;
+}
+
+#define _PR_IS_SLASH(ch) ((ch) == '/' || (ch) == '\\')
+
+static PRBool
+IsPrevCharSlash(const char *str, const char *current)
+{
+    const char *prev;
+
+    if (str >= current) {
+        return PR_FALSE;
+    }
+    prev = _mbsdec(str, current);
+    return (prev == current - 1) && _PR_IS_SLASH(*prev);
+}
+
+/*
+ * IsRootDirectory --
+ *
+ * Return PR_TRUE if the pathname 'fn' is a valid root directory,
+ * else return PR_FALSE.  The char buffer pointed to by 'fn' must
+ * be writable.  During the execution of this function, the contents
+ * of the buffer pointed to by 'fn' may be modified, but on return
+ * the original contents will be restored.  'buflen' is the size of
+ * the buffer pointed to by 'fn'.
+ *
+ * Root directories come in three formats:
+ * 1. / or \, meaning the root directory of the current drive.
+ * 2. C:/ or C:\, where C is a drive letter.
+ * 3. \\<server name>\<share point name>\ or
+ *    \\<server name>\<share point name>, meaning the root directory
+ *    of a UNC (Universal Naming Convention) name.
+ */
+
+static PRBool
+IsRootDirectory(char *fn, size_t buflen)
+{
+    char *p;
+    PRBool slashAdded = PR_FALSE;
+    PRBool rv = PR_FALSE;
+
+    if (_PR_IS_SLASH(fn[0]) && fn[1] == '\0') {
+        return PR_TRUE;
+    }
+
+    if (isalpha(fn[0]) && fn[1] == ':' && _PR_IS_SLASH(fn[2])
+        && fn[3] == '\0') {
+        rv = GetDriveType(fn) > 1 ? PR_TRUE : PR_FALSE;
+        return rv;
+    }
+
+    /* The UNC root directory */
+
+    if (_PR_IS_SLASH(fn[0]) && _PR_IS_SLASH(fn[1])) {
+        /* The 'server' part should have at least one character. */
+        p = &fn[2];
+        if (*p == '\0' || _PR_IS_SLASH(*p)) {
+            return PR_FALSE;
+        }
+
+        /* look for the next slash */
+        do {
+            p = _mbsinc(p);
+        } while (*p != '\0' && !_PR_IS_SLASH(*p));
+        if (*p == '\0') {
+            return PR_FALSE;
+        }
+
+        /* The 'share' part should have at least one character. */
+        p++;
+        if (*p == '\0' || _PR_IS_SLASH(*p)) {
+            return PR_FALSE;
+        }
+
+        /* look for the final slash */
+        do {
+            p = _mbsinc(p);
+        } while (*p != '\0' && !_PR_IS_SLASH(*p));
+        if (_PR_IS_SLASH(*p) && p[1] != '\0') {
+            return PR_FALSE;
+        }
+        if (*p == '\0') {
+            /*
+             * GetDriveType() doesn't work correctly if the
+             * path is of the form \\server\share, so we add
+             * a final slash temporarily.
+             */
+            if ((p + 1) < (fn + buflen)) {
+                *p++ = '\\';
+                *p = '\0';
+                slashAdded = PR_TRUE;
+            } else {
+                return PR_FALSE; /* name too long */
+            }
+        }
+        rv = GetDriveType(fn) > 1 ? PR_TRUE : PR_FALSE;
+        /* restore the 'fn' buffer */
+        if (slashAdded) {
+            *--p = '\0';
+        }
+    }
+    return rv;
+}
+
+PRInt32
+_PR_MD_GETFILEINFO64(const char *fn, PRFileInfo64 *info)
+{
+    WIN32_FILE_ATTRIBUTE_DATA findFileData;
+    BOOL rv;
+
+    if (NULL == fn || '\0' == *fn) {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        return -1;
+    }
+
+    rv = GetFileAttributesEx(fn, GetFileExInfoStandard, &findFileData);
+    if (!rv) {
+        _PR_MD_MAP_OPENDIR_ERROR(GetLastError());
+        return -1;
+    }
+
+    if (findFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
+        info->type = PR_FILE_DIRECTORY;
+    } else {
+        info->type = PR_FILE_FILE;
+    }
+
+    info->size = findFileData.nFileSizeHigh;
+    info->size = (info->size << 32) + findFileData.nFileSizeLow;
+
+    _PR_FileTimeToPRTime(&findFileData.ftLastWriteTime, &info->modifyTime);
+
+    if (0 == findFileData.ftCreationTime.dwLowDateTime &&
+        0 == findFileData.ftCreationTime.dwHighDateTime) {
+        info->creationTime = info->modifyTime;
+    } else {
+        _PR_FileTimeToPRTime(&findFileData.ftCreationTime,
+                             &info->creationTime);
+    }
+
+    return 0;
+}
+
+PRInt32
+_PR_MD_GETFILEINFO(const char *fn, PRFileInfo *info)
+{
+    PRFileInfo64 info64;
+    PRInt32 rv = _PR_MD_GETFILEINFO64(fn, &info64);
+    if (0 == rv)
+    {
+        info->type = info64.type;
+        info->size = (PRUint32) info64.size;
+        info->modifyTime = info64.modifyTime;
+        info->creationTime = info64.creationTime;
+    }
+    return rv;
+}
+
+PRInt32
+_PR_MD_GETOPENFILEINFO64(const PRFileDesc *fd, PRFileInfo64 *info)
+{
+    int rv;
+
+    BY_HANDLE_FILE_INFORMATION hinfo;
+
+    rv = GetFileInformationByHandle((HANDLE)fd->secret->md.osfd, &hinfo);
+    if (rv == FALSE) {
+        _PR_MD_MAP_FSTAT_ERROR(GetLastError());
+        return -1;
+    }
+
+    if (hinfo.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
+        info->type = PR_FILE_DIRECTORY;
+    }
+    else {
+        info->type = PR_FILE_FILE;
+    }
+
+    info->size = hinfo.nFileSizeHigh;
+    info->size = (info->size << 32) + hinfo.nFileSizeLow;
+
+    _PR_FileTimeToPRTime(&hinfo.ftLastWriteTime, &(info->modifyTime) );
+    _PR_FileTimeToPRTime(&hinfo.ftCreationTime, &(info->creationTime) );
+
+    return 0;
+}
+
+PRInt32
+_PR_MD_GETOPENFILEINFO(const PRFileDesc *fd, PRFileInfo *info)
+{
+    PRFileInfo64 info64;
+    int rv = _PR_MD_GETOPENFILEINFO64(fd, &info64);
+    if (0 == rv)
+    {
+        info->type = info64.type;
+        info->modifyTime = info64.modifyTime;
+        info->creationTime = info64.creationTime;
+        LL_L2I(info->size, info64.size);
+    }
+    return rv;
+}
+
+PRStatus
+_PR_MD_SET_FD_INHERITABLE(PRFileDesc *fd, PRBool inheritable)
+{
+    BOOL rv;
+
+    /*
+     * The SetHandleInformation function fails with the
+     * ERROR_CALL_NOT_IMPLEMENTED error on Win95.
+     */
+    rv = SetHandleInformation(
+             (HANDLE)fd->secret->md.osfd,
+             HANDLE_FLAG_INHERIT,
+             inheritable ? HANDLE_FLAG_INHERIT : 0);
+    if (0 == rv) {
+        _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+        return PR_FAILURE;
+    }
+    return PR_SUCCESS;
+}
+
+void
+_PR_MD_INIT_FD_INHERITABLE(PRFileDesc *fd, PRBool imported)
+{
+    if (imported) {
+        fd->secret->inheritable = _PR_TRI_UNKNOWN;
+    } else {
+        fd->secret->inheritable = _PR_TRI_FALSE;
+    }
+}
+
+void
+_PR_MD_QUERY_FD_INHERITABLE(PRFileDesc *fd)
+{
+    DWORD flags;
+
+    PR_ASSERT(_PR_TRI_UNKNOWN == fd->secret->inheritable);
+    if (GetHandleInformation((HANDLE)fd->secret->md.osfd, &flags)) {
+        if (flags & HANDLE_FLAG_INHERIT) {
+            fd->secret->inheritable = _PR_TRI_TRUE;
+        } else {
+            fd->secret->inheritable = _PR_TRI_FALSE;
+        }
+    }
+}
+
+PRInt32
+_PR_MD_RENAME(const char *from, const char *to)
+{
+    /* Does this work with dot-relative pathnames? */
+    if (MoveFileA(from, to)) {
+        return 0;
+    } else {
+        _PR_MD_MAP_RENAME_ERROR(GetLastError());
+        return -1;
+    }
+}
+
+PRInt32
+_PR_MD_ACCESS(const char *name, PRAccessHow how)
+{
+    PRInt32 rv;
+    switch (how) {
+        case PR_ACCESS_WRITE_OK:
+            rv = _access(name, 02);
+            break;
+        case PR_ACCESS_READ_OK:
+            rv = _access(name, 04);
+            break;
+        case PR_ACCESS_EXISTS:
+            return _access(name, 00);
+            break;
+        default:
+            PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+            return -1;
+    }
+    if (rv < 0) {
+        _PR_MD_MAP_ACCESS_ERROR(errno);
+    }
+    return rv;
+}
+
+PRInt32
+_PR_MD_MKDIR(const char *name, PRIntn mode)
+{
+    /* XXXMB - how to translate the "mode"??? */
+    if (CreateDirectoryA(name, NULL)) {
+        return 0;
+    } else {
+        _PR_MD_MAP_MKDIR_ERROR(GetLastError());
+        return -1;
+    }
+}
+
+PRInt32
+_PR_MD_MAKE_DIR(const char *name, PRIntn mode)
+{
+    BOOL rv;
+    SECURITY_ATTRIBUTES sa;
+    LPSECURITY_ATTRIBUTES lpSA = NULL;
+    PSECURITY_DESCRIPTOR pSD = NULL;
+    PACL pACL = NULL;
+
+    if (_PR_NT_MakeSecurityDescriptorACL(mode, dirAccessTable,
+                                         &pSD, &pACL) == PR_SUCCESS) {
+        sa.nLength = sizeof(sa);
+        sa.lpSecurityDescriptor = pSD;
+        sa.bInheritHandle = FALSE;
+        lpSA = &sa;
+    }
+    rv = CreateDirectoryA(name, lpSA);
+    if (lpSA != NULL) {
+        _PR_NT_FreeSecurityDescriptorACL(pSD, pACL);
+    }
+    if (rv) {
+        return 0;
+    } else {
+        _PR_MD_MAP_MKDIR_ERROR(GetLastError());
+        return -1;
+    }
+}
+
+PRInt32
+_PR_MD_RMDIR(const char *name)
+{
+    if (RemoveDirectoryA(name)) {
+        return 0;
+    } else {
+        _PR_MD_MAP_RMDIR_ERROR(GetLastError());
+        return -1;
+    }
+}
+
+PRStatus
+_PR_MD_LOCKFILE(PROsfd f)
+{
+    PRStatus  rc = PR_SUCCESS;
+    DWORD     rv;
+
+    rv = LockFile( (HANDLE)f,
+                   0l, 0l,
+                   0x0l, 0xffffffffl );
+    if ( rv == 0 ) {
+        DWORD err = GetLastError();
+        _PR_MD_MAP_DEFAULT_ERROR(err);
+        PR_LOG( _pr_io_lm, PR_LOG_ERROR,
+                ("_PR_MD_LOCKFILE() failed. Error: %d", err ));
+        rc = PR_FAILURE;
+    }
+
+    return rc;
+} /* end _PR_MD_LOCKFILE() */
+
+PRStatus
+_PR_MD_TLOCKFILE(PROsfd f)
+{
+    PR_SetError( PR_NOT_IMPLEMENTED_ERROR, 0 );
+    return PR_FAILURE;
+} /* end _PR_MD_TLOCKFILE() */
+
+
+PRStatus
+_PR_MD_UNLOCKFILE(PROsfd f)
+{
+    PRInt32   rv;
+
+    rv = UnlockFile( (HANDLE) f,
+                     0l, 0l,
+                     0x0l, 0xffffffffl );
+
+    if ( rv )
+    {
+        return PR_SUCCESS;
+    }
+    else
+    {
+        _PR_MD_MAP_DEFAULT_ERROR(GetLastError());
+        return PR_FAILURE;
+    }
+} /* end _PR_MD_UNLOCKFILE() */
+
+PRInt32
+_PR_MD_PIPEAVAILABLE(PRFileDesc *fd)
+{
+    if (NULL == fd) {
+        PR_SetError(PR_BAD_DESCRIPTOR_ERROR, 0);
+    }
+    else {
+        PR_SetError(PR_NOT_IMPLEMENTED_ERROR, 0);
+    }
+    return -1;
+}
+
+#ifdef MOZ_UNICODE
+
+typedef HANDLE (WINAPI *CreateFileWFn) (LPCWSTR, DWORD, DWORD, LPSECURITY_ATTRIBUTES, DWORD, DWORD, HANDLE);
+static CreateFileWFn createFileW = CreateFileW;
+typedef HANDLE (WINAPI *FindFirstFileWFn) (LPCWSTR, LPWIN32_FIND_DATAW);
+static FindFirstFileWFn findFirstFileW = FindFirstFileW;
+typedef BOOL (WINAPI *FindNextFileWFn) (HANDLE, LPWIN32_FIND_DATAW);
+static FindNextFileWFn findNextFileW = FindNextFileW;
+typedef DWORD (WINAPI *GetFullPathNameWFn) (LPCWSTR, DWORD, LPWSTR, LPWSTR *);
+static GetFullPathNameWFn getFullPathNameW = GetFullPathNameW;
+typedef UINT (WINAPI *GetDriveTypeWFn) (LPCWSTR);
+static GetDriveTypeWFn getDriveTypeW = GetDriveTypeW;
+
+#endif /* MOZ_UNICODE */
+
+#ifdef MOZ_UNICODE
+
+/* ================ UTF16 Interfaces ================================ */
+static void FlipSlashesW(PRUnichar *cp, size_t len)
+{
+    while (len-- > 0) {
+        if (cp[0] == L'/') {
+            cp[0] = L'\\';
+        }
+        cp++;
+    }
+} /* end FlipSlashesW() */
+
+PROsfd
+_PR_MD_OPEN_FILE_UTF16(const PRUnichar *name, PRIntn osflags, int mode)
+{
+    HANDLE file;
+    PRInt32 access = 0;
+    PRInt32 flags = 0;
+    PRInt32 flag6 = 0;
+    SECURITY_ATTRIBUTES sa;
+    LPSECURITY_ATTRIBUTES lpSA = NULL;
+    PSECURITY_DESCRIPTOR pSD = NULL;
+    PACL pACL = NULL;
+
+    if (osflags & PR_CREATE_FILE) {
+        if (_PR_NT_MakeSecurityDescriptorACL(mode, fileAccessTable,
+                                             &pSD, &pACL) == PR_SUCCESS) {
+            sa.nLength = sizeof(sa);
+            sa.lpSecurityDescriptor = pSD;
+            sa.bInheritHandle = FALSE;
+            lpSA = &sa;
+        }
+    }
+
+    if (osflags & PR_SYNC) {
+        flag6 = FILE_FLAG_WRITE_THROUGH;
+    }
+
+    if (osflags & PR_RDONLY || osflags & PR_RDWR) {
+        access |= GENERIC_READ;
+    }
+    if (osflags & PR_WRONLY || osflags & PR_RDWR) {
+        access |= GENERIC_WRITE;
+    }
+
+    if ( osflags & PR_CREATE_FILE && osflags & PR_EXCL ) {
+        flags = CREATE_NEW;
+    }
+    else if (osflags & PR_CREATE_FILE) {
+        if (osflags & PR_TRUNCATE) {
+            flags = CREATE_ALWAYS;
+        }
+        else {
+            flags = OPEN_ALWAYS;
+        }
+    } else {
+        if (osflags & PR_TRUNCATE) {
+            flags = TRUNCATE_EXISTING;
+        }
+        else {
+            flags = OPEN_EXISTING;
+        }
+    }
+
+    file = createFileW(name,
+                       access,
+                       FILE_SHARE_READ|FILE_SHARE_WRITE,
+                       lpSA,
+                       flags,
+                       flag6,
+                       NULL);
+    if (lpSA != NULL) {
+        _PR_NT_FreeSecurityDescriptorACL(pSD, pACL);
+    }
+    if (file == INVALID_HANDLE_VALUE) {
+        _PR_MD_MAP_OPEN_ERROR(GetLastError());
+        return -1;
+    }
+
+    return (PROsfd)file;
+}
+
+PRStatus
+_PR_MD_OPEN_DIR_UTF16(_MDDirUTF16 *d, const PRUnichar *name)
+{
+    PRUnichar filename[ MAX_PATH ];
+    int len;
+
+    len = wcslen(name);
+    /* Need 5 bytes for \*.* and the trailing null byte. */
+    if (len + 5 > MAX_PATH) {
+        PR_SetError(PR_NAME_TOO_LONG_ERROR, 0);
+        return PR_FAILURE;
+    }
+    wcscpy(filename, name);
+
+    /*
+     * If 'name' ends in a slash or backslash, do not append
+     * another backslash.
+     */
+    if (filename[len - 1] == L'/' || filename[len - 1] == L'\\') {
+        len--;
+    }
+    wcscpy(&filename[len], L"\\*.*");
+    FlipSlashesW( filename, wcslen(filename) );
+
+    d->d_hdl = findFirstFileW( filename, &(d->d_entry) );
+    if ( d->d_hdl == INVALID_HANDLE_VALUE ) {
+        _PR_MD_MAP_OPENDIR_ERROR(GetLastError());
+        return PR_FAILURE;
+    }
+    d->firstEntry = PR_TRUE;
+    d->magic = _MD_MAGIC_DIR;
+    return PR_SUCCESS;
+}
+
+PRUnichar *
+_PR_MD_READ_DIR_UTF16(_MDDirUTF16 *d, PRIntn flags)
+{
+    PRInt32 err;
+    BOOL rv;
+    PRUnichar *fileName;
+
+    if ( d ) {
+        while (1) {
+            if (d->firstEntry) {
+                d->firstEntry = PR_FALSE;
+                rv = 1;
+            } else {
+                rv = findNextFileW(d->d_hdl, &(d->d_entry));
+            }
+            if (rv == 0) {
+                break;
+            }
+            fileName = GetFileFromDIR(d);
+            if ( (flags & PR_SKIP_DOT) &&
+                 (fileName[0] == L'.') && (fileName[1] == L'\0')) {
+                continue;
+            }
+            if ( (flags & PR_SKIP_DOT_DOT) &&
+                 (fileName[0] == L'.') && (fileName[1] == L'.') &&
+                 (fileName[2] == L'\0')) {
+                continue;
+            }
+            if ( (flags & PR_SKIP_HIDDEN) && FileIsHidden(d)) {
+                continue;
+            }
+            return fileName;
+        }
+        err = GetLastError();
+        PR_ASSERT(NO_ERROR != err);
+        _PR_MD_MAP_READDIR_ERROR(err);
+        return NULL;
+    }
+    PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+    return NULL;
+}
+
+PRInt32
+_PR_MD_CLOSE_DIR_UTF16(_MDDirUTF16 *d)
+{
+    if ( d ) {
+        if (FindClose(d->d_hdl)) {
+            d->magic = (PRUint32)-1;
+            return 0;
+        } else {
+            _PR_MD_MAP_CLOSEDIR_ERROR(GetLastError());
+            return -1;
+        }
+    }
+    PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+    return -1;
+}
+
+#define _PR_IS_W_SLASH(ch) ((ch) == L'/' || (ch) == L'\\')
+
+/*
+ * IsRootDirectoryW --
+ *
+ * Return PR_TRUE if the pathname 'fn' is a valid root directory,
+ * else return PR_FALSE.  The PRUnichar buffer pointed to by 'fn' must
+ * be writable.  During the execution of this function, the contents
+ * of the buffer pointed to by 'fn' may be modified, but on return
+ * the original contents will be restored.  'buflen' is the size of
+ * the buffer pointed to by 'fn', in PRUnichars.
+ *
+ * Root directories come in three formats:
+ * 1. / or \, meaning the root directory of the current drive.
+ * 2. C:/ or C:\, where C is a drive letter.
+ * 3. \\<server name>\<share point name>\ or
+ *    \\<server name>\<share point name>, meaning the root directory
+ *    of a UNC (Universal Naming Convention) name.
+ */
+
+static PRBool
+IsRootDirectoryW(PRUnichar *fn, size_t buflen)
+{
+    PRUnichar *p;
+    PRBool slashAdded = PR_FALSE;
+    PRBool rv = PR_FALSE;
+
+    if (_PR_IS_W_SLASH(fn[0]) && fn[1] == L'\0') {
+        return PR_TRUE;
+    }
+
+    if (iswalpha(fn[0]) && fn[1] == L':' && _PR_IS_W_SLASH(fn[2])
+        && fn[3] == L'\0') {
+        rv = getDriveTypeW(fn) > 1 ? PR_TRUE : PR_FALSE;
+        return rv;
+    }
+
+    /* The UNC root directory */
+
+    if (_PR_IS_W_SLASH(fn[0]) && _PR_IS_W_SLASH(fn[1])) {
+        /* The 'server' part should have at least one character. */
+        p = &fn[2];
+        if (*p == L'\0' || _PR_IS_W_SLASH(*p)) {
+            return PR_FALSE;
+        }
+
+        /* look for the next slash */
+        do {
+            p++;
+        } while (*p != L'\0' && !_PR_IS_W_SLASH(*p));
+        if (*p == L'\0') {
+            return PR_FALSE;
+        }
+
+        /* The 'share' part should have at least one character. */
+        p++;
+        if (*p == L'\0' || _PR_IS_W_SLASH(*p)) {
+            return PR_FALSE;
+        }
+
+        /* look for the final slash */
+        do {
+            p++;
+        } while (*p != L'\0' && !_PR_IS_W_SLASH(*p));
+        if (_PR_IS_W_SLASH(*p) && p[1] != L'\0') {
+            return PR_FALSE;
+        }
+        if (*p == L'\0') {
+            /*
+             * GetDriveType() doesn't work correctly if the
+             * path is of the form \\server\share, so we add
+             * a final slash temporarily.
+             */
+            if ((p + 1) < (fn + buflen)) {
+                *p++ = L'\\';
+                *p = L'\0';
+                slashAdded = PR_TRUE;
+            } else {
+                return PR_FALSE; /* name too long */
+            }
+        }
+        rv = getDriveTypeW(fn) > 1 ? PR_TRUE : PR_FALSE;
+        /* restore the 'fn' buffer */
+        if (slashAdded) {
+            *--p = L'\0';
+        }
+    }
+    return rv;
+}
+
+PRInt32
+_PR_MD_GETFILEINFO64_UTF16(const PRUnichar *fn, PRFileInfo64 *info)
+{
+    HANDLE hFindFile;
+    WIN32_FIND_DATAW findFileData;
+    PRUnichar pathbuf[MAX_PATH + 1];
+
+    if (NULL == fn || L'\0' == *fn) {
+        PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
+        return -1;
+    }
+
+    /*
+     * FindFirstFile() expands wildcard characters.  So
+     * we make sure the pathname contains no wildcard.
+     */
+    if (NULL != wcspbrk(fn, L"?*")) {
+        PR_SetError(PR_FILE_NOT_FOUND_ERROR, 0);
+        return -1;
+    }
+
+    hFindFile = findFirstFileW(fn, &findFileData);
+    if (INVALID_HANDLE_VALUE == hFindFile) {
+        DWORD len;
+        PRUnichar *filePart;
+
+        /*
+         * FindFirstFile() does not work correctly on root directories.
+         * It also doesn't work correctly on a pathname that ends in a
+         * slash.  So we first check to see if the pathname specifies a
+         * root directory.  If not, and if the pathname ends in a slash,
+         * we remove the final slash and try again.
+         */
+
+        /*
+         * If the pathname does not contain ., \, and /, it cannot be
+         * a root directory or a pathname that ends in a slash.
+         */
+        if (NULL == wcspbrk(fn, L".\\/")) {
+            _PR_MD_MAP_OPENDIR_ERROR(GetLastError());
+            return -1;
+        }
+        len = getFullPathNameW(fn, sizeof(pathbuf)/sizeof(pathbuf[0]), pathbuf,
+                               &filePart);
+        if (0 == len) {
+            _PR_MD_MAP_OPENDIR_ERROR(GetLastError());
+            return -1;
+        }
+        if (len > sizeof(pathbuf)/sizeof(pathbuf[0])) {
+            PR_SetError(PR_NAME_TOO_LONG_ERROR, 0);
+            return -1;
+        }
+        if (IsRootDirectoryW(pathbuf, sizeof(pathbuf)/sizeof(pathbuf[0]))) {
+            info->type = PR_FILE_DIRECTORY;
+            info->size = 0;
+            /*
+             * These timestamps don't make sense for root directories.
+             */
+            info->modifyTime = 0;
+            info->creationTime = 0;
+            return 0;
+        }
+        if (!_PR_IS_W_SLASH(pathbuf[len - 1])) {
+            _PR_MD_MAP_OPENDIR_ERROR(GetLastError());
+            return -1;
+        } else {
+            pathbuf[len - 1] = L'\0';
+            hFindFile = findFirstFileW(pathbuf, &findFileData);
+            if (INVALID_HANDLE_VALUE == hFindFile) {
+                _PR_MD_MAP_OPENDIR_ERROR(GetLastError());
+                return -1;
+            }
+        }
+    }
+
+    FindClose(hFindFile);
+
+    if (findFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
+        info->type = PR_FILE_DIRECTORY;
+    } else {
+        info->type = PR_FILE_FILE;
+    }
+
+    info->size = findFileData.nFileSizeHigh;
+    info->size = (info->size << 32) + findFileData.nFileSizeLow;
+
+    _PR_FileTimeToPRTime(&findFileData.ftLastWriteTime, &info->modifyTime);
+
+    if (0 == findFileData.ftCreationTime.dwLowDateTime &&
+        0 == findFileData.ftCreationTime.dwHighDateTime) {
+        info->creationTime = info->modifyTime;
+    } else {
+        _PR_FileTimeToPRTime(&findFileData.ftCreationTime,
+                             &info->creationTime);
+    }
+
+    return 0;
+}
+/* ================ end of UTF16 Interfaces ================================ */
+#endif /* MOZ_UNICODE */