Import initial version from James Peterson

1 files changed, 54 insertions, 0 deletions

diff --git a/fd.h b/fd.h
new file mode 100644
index 0000000..8836638
--- /dev/null
+++ b/fd.h
@@ -0,0 +1,54 @@
+/* **********************************************
+ *						*
+ * header file file descriptor (FD) code        *
+ *						*
+ *	James Peterson, 1987			*
+ * Copyright (C) 1987 MCC
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of MCC not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  MCC makes no
+ * representations about the suitability of this software for any purpose.  It
+ * is provided "as is" without express or implied warranty.
+ *
+ * MCC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL MCC BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ *						*
+ ********************************************** */
+
+
+/*
+   the following structure remembers for each file descriptor its
+   state.  In particular, we need to know if it is busy or free
+   and if it is in use, by whom.
+*/
+
+#include <sys/select.h>
+
+typedef int FD;
+
+struct FDDescriptor
+{
+    Boolean Busy;
+    int     (*InputHandler)();
+};
+
+struct FDDescriptor *FDD /* array of FD descriptors */ ;
+short   MaxFD /* maximum number of FD's possible */ ;
+
+short   nFDsInUse /* number of FD's actually in use */ ;
+
+fd_set  ReadDescriptors /* bit map of FD's in use -- for select  */ ;
+short   HighestFD /* highest FD in use -- for select */ ;
+
+Boolean ValidFD();
+Boolean InputAvailable();