Add function to measure the length of the fifo buffer

[citadel.git] / libcitadel / lib / stringbuf.c

diff --git a/libcitadel/lib/stringbuf.c b/libcitadel/lib/stringbuf.c
index 082cd7046854db4fe69935c1a692ddff700de2b6..c8f8a6434d53436b8894b336f39d0e6b3b0e0337 100644 (file)
--- a/libcitadel/lib/stringbuf.c
+++ b/libcitadel/lib/stringbuf.c
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 1987-2011 by the citadel.org team
+ *
+ * This program is open source software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
 #include "sysdep.h"
 #include <ctype.h>
 #include <errno.h>
@@ -3756,6 +3774,14 @@ eReadState StrBufCheckBuffer(IOBuffer *FB)
        return eReadSuccess;
 }
 
+long IOBufferStrLength(IOBuffer *FB)
+{
+       if (FB->ReadWritePointer == NULL)
+               return StrLength(FB->Buf);
+       
+       return StrLength(FB->Buf) - (FB->ReadWritePointer - FB->Buf->buf);
+}
+
 /*******************************************************************************
  *           File I/O; Prefer buffered read since its faster!                  *
  *******************************************************************************/