1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP___ITERATOR_OSTREAMBUF_ITERATOR_H
11#define _LIBCPP___ITERATOR_OSTREAMBUF_ITERATOR_H
12
13#include <__config>
14#include <__iterator/iterator.h>
15#include <__iterator/iterator_traits.h>
16#include <cstddef>
17#include <iosfwd> // for forward declaration of basic_streambuf
18
19#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
20#  pragma GCC system_header
21#endif
22
23_LIBCPP_BEGIN_NAMESPACE_STD
24
25_LIBCPP_SUPPRESS_DEPRECATED_PUSH
26template <class _CharT, class _Traits>
27class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator
28#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES)
29    : public iterator<output_iterator_tag, void, void, void, void>
30#endif
31{
32_LIBCPP_SUPPRESS_DEPRECATED_POP
33public:
34    typedef output_iterator_tag                 iterator_category;
35    typedef void                                value_type;
36#if _LIBCPP_STD_VER > 17
37    typedef ptrdiff_t                           difference_type;
38#else
39    typedef void                                difference_type;
40#endif
41    typedef void                                pointer;
42    typedef void                                reference;
43    typedef _CharT                              char_type;
44    typedef _Traits                             traits_type;
45    typedef basic_streambuf<_CharT, _Traits>    streambuf_type;
46    typedef basic_ostream<_CharT, _Traits>      ostream_type;
47
48private:
49    streambuf_type* __sbuf_;
50public:
51    _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT
52        : __sbuf_(__s.rdbuf()) {}
53    _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT
54        : __sbuf_(__s) {}
55    _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c)
56        {
57            if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof()))
58                __sbuf_ = nullptr;
59            return *this;
60        }
61    _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*()     {return *this;}
62    _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++()    {return *this;}
63    _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;}
64    _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == nullptr;}
65
66    template <class _Ch, class _Tr>
67    friend
68    _LIBCPP_HIDE_FROM_ABI
69    ostreambuf_iterator<_Ch, _Tr>
70    __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s,
71                     const _Ch* __ob, const _Ch* __op, const _Ch* __oe,
72                     ios_base& __iob, _Ch __fl);
73};
74
75_LIBCPP_END_NAMESPACE_STD
76
77#endif // _LIBCPP___ITERATOR_OSTREAMBUF_ITERATOR_H
78