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extern/stdcxx/4.2.1/tests/regress/27.stringbuf.xsputn.stdcxx-576.cpp

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+/************************************************************************
+ *
+ * 27.stringbuf.xsputn.stdcxx-576.cpp - test case from STDCXX-576 issue
+ *
+ * $Id: 27.stringbuf.xsputn.stdcxx-576.cpp 590132 2007-10-30 16:01:33Z faridz $
+ *
+ ***************************************************************************
+ *
+ * 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the  License is distributed on an  "AS IS" BASIS,
+ * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY  KIND, either  express or
+ * implied.   See  the License  for  the  specific language  governing
+ * permissions and limitations under the License.
+ * 
+ **************************************************************************/
+
+#include <sstream>  // for stringbuf
+#include <string>   // for string
+#include <cassert>  // for assert()
+
+struct PubBuf: std::stringbuf
+{
+    char* Pbase () const { return this->pbase (); }
+};
+
+int main ()
+{
+    // 512 is the default buffer size of the basic_stringbuf
+    std::string s (512, 'a');
+
+    std::stringbuf sbuf (s);
+    PubBuf& buf = (PubBuf&)sbuf;
+
+    std::streamsize res = buf.sputn (buf.Pbase (), 128);
+    s.append (s.begin (), s.begin () + 128);
+
+    const std::string& str = buf.str ();
+
+    assert (res == 128);
+    assert (str.size () == s.size ());
+    assert (str == s);
+
+    return 0;
+}