From 5f2acb17260ee3c874412ba79bc966292100bccc Mon Sep 17 00:00:00 2001
From: Caolán McNamara <caolanm@redhat.com>
Date: Sat, 16 Jul 2011 22:15:49 +0100
Subject: add a SvStream::remainingSize

---
 tools/inc/tools/stream.hxx     |  2 ++
 tools/source/stream/stream.cxx | 12 ++++++++++++
 2 files changed, 14 insertions(+)

(limited to 'tools')

diff --git a/tools/inc/tools/stream.hxx b/tools/inc/tools/stream.hxx
index 71cae4e0e3f2..dc097b8c563f 100644
--- a/tools/inc/tools/stream.hxx
+++ b/tools/inc/tools/stream.hxx
@@ -390,6 +390,8 @@ public:
     sal_Size        Seek( sal_Size nPos );
     sal_Size        SeekRel( sal_sSize nPos );
     sal_Size        Tell() const { return nBufFilePos+nBufActualPos;  }
+    //length between current (Tell()) pos and end of stream
+    sal_Size        remainingSize();
     void            Flush();
     sal_Bool        IsEof() const { return bIsEof; }
     // next Tell() <= nSize
diff --git a/tools/source/stream/stream.cxx b/tools/source/stream/stream.cxx
index 242f9bb04dc1..2917776e6212 100644
--- a/tools/source/stream/stream.cxx
+++ b/tools/source/stream/stream.cxx
@@ -1797,6 +1797,18 @@ sal_Size SvStream::Seek( sal_Size nFilePos )
     return nBufFilePos + nBufActualPos;
 }
 
+//probably not as inefficient as it looks seeing as STREAM_SEEK_TO_END in the
+//Seek backends is nomally special cased feel free to make this virtual and add
+//good implementations for SvFileStream etc
+sal_Size SvStream::remainingSize()
+{
+    sal_Size nCurr = Tell();
+    sal_Size nEnd = Seek(STREAM_SEEK_TO_END);
+    sal_Size nMaxAvailable = nEnd-nCurr;
+    Seek(nCurr);
+    return nMaxAvailable;
+}
+
 /*************************************************************************
 |*
 |*    Stream::Flush()
-- 
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