1 files changed, 143 insertions, 0 deletions
diff --git a/include/cosv/bstream.hxx b/include/cosv/bstream.hxx
new file mode 100644
index 000000000000..2d943bc02ce6
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+++ b/include/cosv/bstream.hxx
@@ -0,0 +1,143 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef CSV_BSTREAM_HXX
+#define CSV_BSTREAM_HXX
+
+#include <string.h>
+#include <cosv/string.hxx>
+
+
+namespace csv
+{
+
+
+enum seek_dir
+{
+    beg = 0,
+    cur = 1,
+    end = 2
+};
+
+
+class bistream
+{
+  public:
+    // LIFECYCLE
+    virtual             ~bistream() {}
+
+    //  OPERATIONS
+        /// @return Number of actually read bytes.
+    uintt               read(
+                            void *          out_pDest,
+                            uintt           i_nNrofBytes);
+    // INQUIRY
+        /**  @return True, if already one try to read had failed.
+             There is no guarantee, that it returns true, if end of data
+             is just reached.
+             Though it will return false, if there is still somemething
+             to read.
+        */
+    bool                eod() const;
+
+  private:
+    virtual uintt       do_read(
+                            void *          out_pDest,
+                            uintt           i_nNrofBytes) = 0;
+    virtual bool        inq_eod() const = 0;
+};
+
+
+class bostream
+{
+  public:
+    // LIFECYCLE
+    virtual             ~bostream() {}
+
+    //  OPERATIONS
+        /// @return Number of actually written bytes.
+    uintt               write(
+                            const void *    i_pSrc,
+                            uintt           i_nNrofBytes);
+        /// @return Number of actually written bytes.
+    uintt               write(
+                            const char *    i_pSrc );
+        /// @return Number of actually written bytes.
+    uintt               write(
+                            const String &  i_pSrc );
+  private:
+    virtual uintt       do_write(
+                            const void *    i_pSrc,
+                            uintt           i_nNrofBytes) = 0;
+};
+
+
+class bstream : public bistream,
+                public bostream
+{
+  public:
+    uintt               seek(
+                            intt            i_nDistanceFromBegin,
+                            seek_dir        i_eStartPoint = ::csv::beg );
+    uintt               position() const;
+
+  private:
+    virtual uintt       do_seek(
+                            intt            i_nDistance,
+                            seek_dir        i_eStartPoint = ::csv::beg ) = 0;
+    virtual uintt       inq_position() const = 0;
+};
+
+
+// IMPLEMENTATION
+inline uintt
+bistream::read( void *         o_pDest,
+               uintt           i_nNrofBytes)
+    { return do_read(o_pDest, i_nNrofBytes); }
+inline bool
+bistream::eod() const
+    { return inq_eod(); }
+
+inline uintt
+bostream::write( const void *   i_pSrc,
+                 uintt          i_nNrofBytes)
+    { return do_write( i_pSrc, i_nNrofBytes ); }
+inline uintt
+bostream::write( const char * i_sSrc )
+    { return write( i_sSrc, strlen(i_sSrc) ); }
+inline uintt
+bostream::write( const String & i_sSrc )
+    { return write( i_sSrc.c_str(), i_sSrc.length() ); }
+
+inline uintt
+bstream::seek( intt     i_nDistance,
+               seek_dir i_eStartPoint )
+    { return do_seek( i_nDistance, i_eStartPoint ); }
+inline uintt
+bstream::position() const
+    { return inq_position(); }
+
+
+
+}   // namespace csv
+
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */