From 165e84b094a66497f19f02a7a9dc480712337986 Mon Sep 17 00:00:00 2001
From: chatty
Date: Tue, 28 Nov 2000 17:07:44 +0000
Subject:  *      Created from bits of MsgStream.cc

---
 comm/BufStream.cc | 206 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 206 insertions(+)
 create mode 100644 comm/BufStream.cc

diff --git a/comm/BufStream.cc b/comm/BufStream.cc
new file mode 100644
index 0000000..d1ca25d
--- /dev/null
+++ b/comm/BufStream.cc
@@ -0,0 +1,206 @@
+/*
+ *	The Unix Channel
+ *
+ *	by Michel Beaudouin-Lafon
+ *
+ *	Copyright 1990-1997
+ *	Laboratoire de Recherche en Informatique (LRI)
+ *
+ *	Buffered streams
+ *
+ *	$Id$
+ *	$CurLog$
+ */
+
+#include "BufStream.h"
+#include "error.h"
+
+/*?
+These constructors are similar to those of class \typ{UchSocket}.
+?*/
+UchBufStream :: UchBufStream (UchAddress* bindTo, UchAddress* connectTo)
+: UchStream (bindTo, connectTo),
+  InBuffer (),
+  OutBuffer (),
+  OutSize (128),
+  Sync (false)
+{
+}
+
+// *** this copy constructor might be automatically generated
+/*?nodoc?*/
+UchBufStream :: UchBufStream (const UchBufStream& ms)
+: UchStream (ms),
+  InBuffer (),
+  OutBuffer (),
+  OutSize (ms.OutSize),
+  Sync (ms.Sync)
+{
+}
+
+/*?nodoc?*/
+UchBufStream :: ~UchBufStream ()
+{
+	Flush ();
+	InBuffer.Clear ();
+	OutBuffer.Clear ();
+}
+
+/*?nextdoc?*/
+void
+UchBufStream :: InputBuffer (int min, int grow, int max)
+{
+	InBuffer.SetSizes (min, grow, max);
+}
+
+/*?
+Set the input and output buffer sizes.
+Default sizes are used if these functions are not called.
+?*/
+void
+UchBufStream :: OutputBuffer (int min, int grow, int max)
+{
+	OutBuffer.SetSizes (min, grow, max);
+	OutSize = max;
+}
+
+/*?
+Flush the output buffer.
+This function is called automatically when the buffer exceeds its flush size,
+or after each message when this stream is in synchronous mode.
+It is also called from \fun{Ask} to wait for the answer.
+?*/
+void
+UchBufStream :: Flush ()
+{
+	if (OutBuffer.BufLength () == 0)
+		return;
+	int n = Write (OutBuffer);
+	OutBuffer.Flush (n);
+}
+
+/*?nodoc?*/
+void
+UchBufStream :: HandleWrite ()
+{
+	Flush ();
+}
+
+
+// read stream into input buffer
+// delete the stream when an eof is received
+// return the number of bytes read
+//
+/*?hidden?*/
+int
+UchBufStream :: ReadInput ()
+{
+	if (InBuffer.BufLength () == 0)
+		InBuffer.NeedSize (128);
+	int n = Read (InBuffer);
+	if (n <= 0) {
+		if (n == -2) {
+			InBuffer.Grow ();
+			n = Read (InBuffer);
+		}
+		if (n < 0)
+			SysError (ErrWarn, "UchBufStream::ReadInput");
+		if (n <= 0)
+			Closing (n < 0 ? false : true);
+	}
+	return n;
+}
+
+/*?
+This virtual function is called when an end of file is read, 
+meaning that the communication is terminated.
+It is also called if an error occurs while reading.
+You can check the value of the global variable \var{errno}:
+if it is non zero, \fun{Closing} was called because of an error. % wrong
+By default this function does nothing.
+?*/
+void
+UchBufStream :: Closing (bool)
+{
+}
+
+
+void
+UchBufStream :: WriteLong (lword l)
+{
+	OutBuffer << l;
+}
+
+void
+UchBufStream :: WriteShort (sword s)
+{
+	OutBuffer << s;
+}
+
+void
+UchBufStream :: WriteByte (byte b)
+{
+	OutBuffer << b;
+}
+
+void
+UchBufStream :: WriteChar (char c)
+{
+	OutBuffer << c;
+}
+
+void
+UchBufStream :: WriteString (const char* s)
+{
+	OutBuffer << s;
+}
+
+void
+UchBufStream :: WriteBuf (const byte* b, int n)
+{
+	OutBuffer.WriteBuf (b, n);
+}
+
+bool
+UchBufStream :: ReadLong (lword& l)
+{
+	return InBuffer.ReadLong (l);
+}
+
+bool
+UchBufStream :: ReadShort (sword& s)
+{
+	return InBuffer.ReadShort (s);
+}
+
+bool
+UchBufStream :: ReadByte (byte& b)
+{
+	return InBuffer.ReadByte (b);
+}
+
+bool
+UchBufStream :: ReadChar (char& c)
+{
+	return InBuffer.ReadChar (c);
+}
+
+int
+UchBufStream :: ReadString (char* s, int n)
+{
+	return InBuffer.ReadString (s, n);
+}
+
+int
+UchBufStream :: ReadString (CcuString& s)
+{
+	return InBuffer.ReadString (s);
+}
+
+bool
+UchBufStream :: ReadBuf (byte* b, int n)
+{
+	return InBuffer.ReadBuf (b, n);
+}
+
+
-- 
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