27.filebuf.sgetn.stdcxx-161.cpp

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#include <fstream>
#include <cassert>
#include <cstdio>
 
#include <rw_file.h>
 
int main ()
{
    std::filebuf fb;
 
    const char* const tmpfname = rw_tmpnam (0);
 
    assert (0 != fb.open (tmpfname, std::ios::out));
    assert (6 == fb.sputn ("ABCDEF", 6));
    assert (0 != fb.close ());
 
    assert (0 != fb.open (tmpfname,
                          std::ios::in | std::ios::out | std::ios::stdio));
 
    assert (3 == fb.sputn ("abc", 3));
    assert (-1 != fb.pubsync ());
 
    char buf [3] = "";
    assert (3 == fb.sgetn (buf, sizeof buf));
    assert (0 == std::filebuf::traits_type::compare ("DEF", buf, 3));
 
    fb.close ();
 
    std::remove (tmpfname);
 
#ifndef _RWSTD_NO_WCHAR_T
 
    std::wfilebuf wfb;
 
    assert (0 != wfb.open (tmpfname, std::ios::out));
    assert (6 == wfb.sputn (L"ABCDEF", 6));
    assert (0 != wfb.close ());
 
    assert (0 != wfb.open (tmpfname,
                           std::ios::in | std::ios::out | std::ios::stdio));
 
    assert (3 == wfb.sputn (L"abc", 3));
    assert (-1 != wfb.pubsync ());
 
    wchar_t wbuf [3] = L"";
    assert (3 == wfb.sgetn (wbuf, sizeof wbuf / sizeof *wbuf));
    assert (0 == std::wfilebuf::traits_type::compare (L"DEF", wbuf, 3));
 
    wfb.close ();
 
    std::remove (tmpfname);
 
#endif   // _RWSTD_NO_WCHAR_T
 
    return 0;
}