102 lines
3.2 KiB
C++
102 lines
3.2 KiB
C++
/***************************************************************************
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*
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* ostreambuf_iterator.cpp - ostreambuf_iterator example
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*
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* $Id: ostreambuf_iterator.cpp 550991 2007-06-26 23:58:07Z sebor $
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*
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***************************************************************************
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*
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* Copyright 1994-2006 Rogue Wave Software.
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*
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**************************************************************************/
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#include <fstream> // for filebuf
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#include <iostream> // for cout
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#include <iterator> // for streambuf_iterator's
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#include <cstdio> // for L_tmpnam, tmpnam and remove
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#include <examples.h>
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int main ( )
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{
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#ifndef _RWSTD_STRICT_ANSI
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// use an extension of this implementation: NULL file name argument
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// creates a temporary file; closing the file stream object or its
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// associated filebuf removes the temporary file
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const char* const fname = 0;
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#else // if defined (_RWSTD_STRICT_ANSI)
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char fnamebuf [L_tmpnam];
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// create a temporary filename
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const char* const fname = std::tmpnam (fnamebuf);
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if (!fname)
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return 1;
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#endif // _RWSTD_STRICT_ANSI
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// create a filebuf object
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std::filebuf buf;
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// open the file and link it to the filebuf object
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buf.open (fname, std::ios::in | std::ios::out | std::ios::trunc);
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// create an ostreambuf_iterator and link it to
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// the filebuf object
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std::ostreambuf_iterator<char, std::char_traits<char> > out_iter (&buf);
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const char charset[] =
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"@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~";
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// output characters into the file using the ostreambuf_iterator
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for (unsigned i = 0; charset [i]; ++i)
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out_iter = charset [i];
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// seek to the beginning of the file
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buf.pubseekpos(0);
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// create an istreambuf_iterator and link it to the filebuf object
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std::istreambuf_iterator<char, std::char_traits<char> > in_iter (&buf);
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// construct an end of stream iterator
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std::istreambuf_iterator<char, std::char_traits<char> > end;
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std::cout << '\n';
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// output the contents of the file
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while (!in_iter.equal (end))
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std::cout << *in_iter++;
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std::cout << '\n';
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if (fname) {
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// close the stream before removing the file
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buf.close ();
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// remove the temporary file (must have a name)
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std::remove (fname);
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}
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return 0;
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}
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