1// Stream buffer classes -*- C++ -*-
2
3// Copyright (C) 2004, 2005 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 2, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15
16// You should have received a copy of the GNU General Public License along
17// with this library; see the file COPYING.  If not, write to the Free
18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
19// USA.
20
21// As a special exception, you may use this file as part of a free software
22// library without restriction.  Specifically, if other files instantiate
23// templates or use macros or inline functions from this file, or you compile
24// this file and link it with other files to produce an executable, this
25// file does not by itself cause the resulting executable to be covered by
26// the GNU General Public License.  This exception does not however
27// invalidate any other reasons why the executable file might be covered by
28// the GNU General Public License.
29
30//
31// ISO C++ 14882: 27.5  Stream buffers
32//
33
34#include <streambuf>
35
36namespace std
37{
38  template<>
39    streamsize
40    __copy_streambufs(basic_streambuf<char>* __sbin,
41		      basic_streambuf<char>* __sbout)
42    {
43      typedef basic_streambuf<char>::traits_type traits_type;
44      streamsize __ret = 0;
45      traits_type::int_type __c = __sbin->sgetc();
46      while (!traits_type::eq_int_type(__c, traits_type::eof()))
47	{
48	  const streamsize __n = __sbin->egptr() - __sbin->gptr();
49	  if (__n > 1)
50	    {
51	      const streamsize __wrote = __sbout->sputn(__sbin->gptr(), __n);
52	      __sbin->gbump(__wrote);
53	      __ret += __wrote;
54	      if (__wrote < __n)
55		break;
56	      __c = __sbin->underflow();
57	    }
58	  else
59	    {
60	      __c = __sbout->sputc(traits_type::to_char_type(__c));
61	      if (traits_type::eq_int_type(__c, traits_type::eof()))
62		break;
63	      ++__ret;
64	      __c = __sbin->snextc();
65	    }
66	}
67      return __ret;
68    }
69
70#ifdef _GLIBCXX_USE_WCHAR_T
71  template<>
72    streamsize
73    __copy_streambufs(basic_streambuf<wchar_t>* __sbin,
74		      basic_streambuf<wchar_t>* __sbout)
75    {
76      typedef basic_streambuf<wchar_t>::traits_type traits_type;
77      streamsize __ret = 0;
78      traits_type::int_type __c = __sbin->sgetc();
79      while (!traits_type::eq_int_type(__c, traits_type::eof()))
80	{
81	  const streamsize __n = __sbin->egptr() - __sbin->gptr();
82	  if (__n > 1)
83	    {
84	      const streamsize __wrote = __sbout->sputn(__sbin->gptr(), __n);
85	      __sbin->gbump(__wrote);
86	      __ret += __wrote;
87	      if (__wrote < __n)
88		break;
89	      __c = __sbin->underflow();
90	    }
91	  else
92	    {
93	      __c = __sbout->sputc(traits_type::to_char_type(__c));
94	      if (traits_type::eq_int_type(__c, traits_type::eof()))
95		break;
96	      ++__ret;
97	      __c = __sbin->snextc();
98	    }
99	}
100      return __ret;
101    }
102#endif
103} // namespace std
104