import winsup-2000-02-17 snapshot

1 files changed, 90 insertions, 0 deletions

diff --git a/winsup/cygwin/fhandler_floppy.cc b/winsup/cygwin/fhandler_floppy.cc
new file mode 100644
index 0000000..7c58982
--- /dev/null
+++ b/winsup/cygwin/fhandler_floppy.cc
@@ -0,0 +1,90 @@
+/* fhandler_floppy.cc.  See fhandler.h for a description of the
+   fhandler classes.
+
+   Copyright 1999 Cygnus Solutions.
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+#include <sys/termios.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#include "winsup.h"
+
+/**********************************************************************/
+/* fhandler_dev_floppy */
+
+int
+fhandler_dev_floppy::is_eom (int win_error)
+{
+  int ret = (win_error == ERROR_INVALID_PARAMETER);
+  if (ret)
+    debug_printf ("end of medium");
+  return ret;
+}
+
+int
+fhandler_dev_floppy::is_eof (int win_error)
+{
+  int ret = 0;
+  if (ret)
+    debug_printf ("end of file");
+  return ret;
+}
+
+fhandler_dev_floppy::fhandler_dev_floppy (const char *name, int unit) : fhandler_dev_raw (FH_FLOPPY, name, unit)
+{
+  set_cb (sizeof *this);
+}
+
+int
+fhandler_dev_floppy::open (const char *path, int flags, mode_t)
+{
+  /* The correct size of the buffer would be 512 bytes,
+   * which is the atomic size, supported by WinNT.
+   * Unfortunately, the performance is worse than
+   * access to file system on same device!
+   * Setting buffer size to a relatively big value
+   * increases performance by means.
+   * The new ioctl call with 'rdevio.h' header file
+   * supports changing this value.
+   *
+   * Let's be smart: Let's take a multiplier of typical tar
+   * and cpio buffer sizes by default!
+  */
+  devbufsiz = 61440L; /* 512L; */
+  return fhandler_dev_raw::open (path, flags);
+}
+
+int
+fhandler_dev_floppy::close (void)
+{
+  int ret;
+
+  ret = writebuf ();
+  if (ret)
+    {
+      fhandler_dev_raw::close ();
+      return ret;
+    }
+  return fhandler_dev_raw::close ();
+}
+
+off_t
+fhandler_dev_floppy::lseek (off_t offset, int whence)
+{
+  /* FIXME: Need to implement better. */
+  offset = (offset / 512) * 512;
+  return fhandler_base::lseek (offset, whence);
+}
+
+int
+fhandler_dev_floppy::ioctl (unsigned int cmd, void *buf)
+{
+  return fhandler_dev_raw::ioctl (cmd, buf);
+}
+