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experimental	[ DIR ]	drwxr-xr-x
ext	[ DIR ]	drwxr-xr-x
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algorithm	2.94 KB	-rw-r--r--
any	18.38 KB	-rw-r--r--
array	14.61 KB	-rw-r--r--
atomic	46.67 KB	-rw-r--r--
barrier	7.57 KB	-rw-r--r--
bit	13.89 KB	-rw-r--r--
bitset	44.92 KB	-rw-r--r--
cassert	1.61 KB	-rw-r--r--
ccomplex	1.3 KB	-rw-r--r--
cctype	2.35 KB	-rw-r--r--
cerrno	1.73 KB	-rw-r--r--
cfenv	2 KB	-rw-r--r--
cfloat	1.84 KB	-rw-r--r--
charconv	20.49 KB	-rw-r--r--
chrono	58.31 KB	-rw-r--r--
cinttypes	2.11 KB	-rw-r--r--
ciso646	1.43 KB	-rw-r--r--
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clocale	1.86 KB	-rw-r--r--
cmath	48.23 KB	-rw-r--r--
codecvt	5.15 KB	-rw-r--r--
compare	36.77 KB	-rw-r--r--
complex	54.63 KB	-rw-r--r--
complex.h	1.56 KB	-rw-r--r--
concepts	11.94 KB	-rw-r--r--
condition_variable	12.48 KB	-rw-r--r--
coroutine	9.58 KB	-rw-r--r--
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cstdbool	1.37 KB	-rw-r--r--
cstddef	6.11 KB	-rw-r--r--
cstdint	2.28 KB	-rw-r--r--
cstdio	4.33 KB	-rw-r--r--
cstdlib	6.18 KB	-rw-r--r--
cstring	3.08 KB	-rw-r--r--
ctgmath	1.33 KB	-rw-r--r--
ctime	2.24 KB	-rw-r--r--
cuchar	2.84 KB	-rw-r--r--
cwchar	6.39 KB	-rw-r--r--
cwctype	2.73 KB	-rw-r--r--
cxxabi.h	21.76 KB	-rw-r--r--
deque	4.35 KB	-rw-r--r--
exception	5.29 KB	-rw-r--r--
execution	1.76 KB	-rw-r--r--
expected	33.11 KB	-rw-r--r--
fenv.h	1.97 KB	-rw-r--r--
filesystem	1.61 KB	-rw-r--r--
forward_list	2.63 KB	-rw-r--r--
fstream	39.73 KB	-rw-r--r--
functional	42.3 KB	-rw-r--r--
future	51.12 KB	-rw-r--r--
initializer_list	2.97 KB	-rw-r--r--
iomanip	16.16 KB	-rw-r--r--
ios	1.56 KB	-rw-r--r--
iosfwd	8.16 KB	-rw-r--r--
iostream	2.63 KB	-rw-r--r--
istream	33.3 KB	-rw-r--r--
iterator	2.69 KB	-rw-r--r--
latch	2.67 KB	-rw-r--r--
limits	70.04 KB	-rw-r--r--
list	3.57 KB	-rw-r--r--
locale	1.45 KB	-rw-r--r--
map	4.04 KB	-rw-r--r--
math.h	4.47 KB	-rw-r--r--
memory	4.44 KB	-rw-r--r--
memory_resource	25.26 KB	-rw-r--r--
mutex	25.4 KB	-rw-r--r--
new	8.45 KB	-rw-r--r--
numbers	6.1 KB	-rw-r--r--
numeric	25.37 KB	-rw-r--r--
optional	43.4 KB	-rw-r--r--
ostream	25.31 KB	-rw-r--r--
queue	2.41 KB	-rw-r--r--
random	1.65 KB	-rw-r--r--
ranges	117.31 KB	-rw-r--r--
ratio	19.81 KB	-rw-r--r--
regex	3.04 KB	-rw-r--r--
scoped_allocator	17.24 KB	-rw-r--r--
semaphore	2.93 KB	-rw-r--r--
set	3.9 KB	-rw-r--r--
shared_mutex	24.02 KB	-rw-r--r--
source_location	2.68 KB	-rw-r--r--
span	12.82 KB	-rw-r--r--
spanstream	12.07 KB	-rw-r--r--
sstream	38.31 KB	-rw-r--r--
stack	2.33 KB	-rw-r--r--
stacktrace	21.02 KB	-rw-r--r--
stdatomic.h	3.97 KB	-rw-r--r--
stdexcept	9.65 KB	-rw-r--r--
stdlib.h	2.2 KB	-rw-r--r--
stop_token	15.61 KB	-rw-r--r--
streambuf	29.19 KB	-rw-r--r--
string	4.69 KB	-rw-r--r--
string_view	25.55 KB	-rw-r--r--
syncstream	8.13 KB	-rw-r--r--
system_error	14.65 KB	-rw-r--r--
tgmath.h	1.33 KB	-rw-r--r--
thread	6.68 KB	-rw-r--r--
tuple	61.37 KB	-rw-r--r--
type_traits	107.81 KB	-rw-r--r--
typeindex	3.43 KB	-rw-r--r--
typeinfo	8.11 KB	-rw-r--r--
unordered_map	3.62 KB	-rw-r--r--
unordered_set	3.48 KB	-rw-r--r--
utility	6.89 KB	-rw-r--r--
valarray	39.82 KB	-rw-r--r--
variant	63.95 KB	-rw-r--r--
vector	4.7 KB	-rw-r--r--
version	10.98 KB	-rw-r--r--

Code Editor : spanstream

// Streams based on std::span -*- C++ -*-

// Copyright The GNU Toolchain Authors.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file spanstream
 *  This is a Standard C++ Library header.
 */

#ifndef _GLIBCXX_SPANSTREAM
#define _GLIBCXX_SPANSTREAM 1

#pragma GCC system_header

#if __cplusplus > 202002L
#include <span>
#include <streambuf>
#include <istream>
#include <ostream>
#include <bits/ranges_base.h>

#if __cpp_lib_span
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

#define __cpp_lib_spanstream 202106L

template<typename _CharT, typename _Traits>
  class basic_spanbuf
  : public basic_streambuf<_CharT, _Traits>
  {
    using __streambuf_type = basic_streambuf<_CharT, _Traits>;

public:
    using char_type   = _CharT;
    using int_type    = typename _Traits::int_type;
    using pos_type    = typename _Traits::pos_type;
    using off_type    = typename _Traits::off_type;
    using traits_type = _Traits;

// [spanbuf.ctor], constructors
    basic_spanbuf() : basic_spanbuf(ios_base::in | ios_base::out)
    { }

explicit
    basic_spanbuf(ios_base::openmode __which)
    : __streambuf_type(), _M_mode(__which)
    { }

explicit
    basic_spanbuf(std::span<_CharT> __s,
		  ios_base::openmode __which = ios_base::in | ios_base::out)
    : __streambuf_type(), _M_mode(__which)
    { span(__s); }

basic_spanbuf(const basic_spanbuf&) = delete;

/** Move constructor.
     *
     * Transfers the buffer and pointers into the get and put areas from
     * `__rhs` to `*this`.
     *
     * In this implementation `rhs` is left unchanged,
     * but that is not guaranteed by the standard.
     */
    basic_spanbuf(basic_spanbuf&& __rhs)
    : __streambuf_type(__rhs), _M_mode(__rhs._M_mode), _M_buf(__rhs._M_buf)
    { }

// [spanbuf.assign], assignment and swap
    basic_spanbuf& operator=(const basic_spanbuf&) = delete;

basic_spanbuf&
    operator=(basic_spanbuf&& __rhs)
    {
      basic_spanbuf(std::move(__rhs)).swap(*this);
      return *this;
    }

void
    swap(basic_spanbuf& __rhs)
    {
      __streambuf_type::swap(__rhs);
      std::swap(_M_mode, __rhs._M_mode);
      std::swap(_M_buf, __rhs._M_buf);
    }

// [spanbuf.members], member functions
    std::span<_CharT>
    span() const noexcept
    {
      if (_M_mode & ios_base::out)
	return {this->pbase(), this->pptr()};
      else
	return _M_buf;
    }

void
    span(std::span<_CharT> __s) noexcept
    {
      _M_buf = __s;
      if (_M_mode & ios_base::out)
	{
	  this->setp(__s.data(), __s.data() + __s.size());
	  if (_M_mode & ios_base::ate)
	    this->pbump(__s.size());
	}
      if (_M_mode & ios_base::in)
	this->setg(__s.data(), __s.data(), __s.data() + __s.size());
    }

protected:
    // [spanbuf.virtuals], overridden virtual functions
    basic_streambuf<_CharT, _Traits>*
    setbuf(_CharT* __s, streamsize __n) override
    {
      span({__s, __n});
      return this;
    }

pos_type
    seekoff(off_type __off, ios_base::seekdir __way,
	    ios_base::openmode __which = ios_base::in | ios_base::out) override
    {
      pos_type __ret =  pos_type(off_type(-1));

if (__way == ios_base::beg)
	{
	  if (0 <= __off && __off <= _M_buf.size())
	    {
	      if (__which & ios_base::in)
		this->setg(this->eback(), this->eback() + __off, this->egptr());

if (__which & ios_base::out)
		{
		  this->setp(this->pbase(), this->epptr());
		  this->pbump(__off);
		}

__ret = pos_type(__off);
	    }
	}
      else
	{
	  off_type __base;
	  __which &= (ios_base::in|ios_base::out);

if (__which == ios_base::out)
	    __base = this->pptr() - this->pbase();
	  else if (__way == ios_base::cur)
	    {
	      if (__which == ios_base::in)
		__base = this->gptr() - this->eback();
	      else
		return __ret;
	    }
	  else if (__way == ios_base::end)
	    __base = _M_buf.size();

if (__builtin_add_overflow(__base, __off, &__off))
	    return __ret;

if (__off < 0 || __off > _M_buf.size())
	    return __ret;

if (__which & ios_base::in)
	    this->setg(this->eback(), this->eback() + __off, this->egptr());

if (__which & ios_base::out)
	    {
	      this->setp(this->pbase(), this->epptr());
	      this->pbump(__off);
	    }

__ret = pos_type(__off);

}
      return __ret;
    }

pos_type
    seekpos(pos_type __sp,
	    ios_base::openmode __which = ios_base::in | ios_base::out) override
    { return seekoff(off_type(__sp), ios_base::beg, __which); }

private:

ios_base::openmode _M_mode;
    std::span<_CharT> _M_buf;
  };

template<typename _CharT, typename _Traits>
  inline void
  swap(basic_spanbuf<_CharT, _Traits>& __x,
       basic_spanbuf<_CharT, _Traits>& __y)
  { __x.swap(__y); }

using spanbuf = basic_spanbuf<char>;
using wspanbuf = basic_spanbuf<wchar_t>;

template<typename _CharT, typename _Traits>
  class basic_ispanstream
  : public basic_istream<_CharT, _Traits>
  {
    using __istream_type = basic_istream<_CharT, _Traits>;

// [ispanstream.ctor], constructors
    explicit
    basic_ispanstream(std::span<_CharT> __s,
		      ios_base::openmode __which = ios_base::in)
    : __istream_type(std::__addressof(_M_sb)),
      _M_sb(__s, __which | ios_base::in)
    { }

basic_ispanstream(const basic_ispanstream&) = delete;

basic_ispanstream(basic_ispanstream&& __rhs)
    : __istream_type(std::move(__rhs)), _M_sb(std::move(__rhs._M_sb))
    {
      __istream_type::set_rdbuf(std::addressof(_M_sb));
    }

template<typename _Ros>
      requires ranges::borrowed_range<_Ros>
	&& (!convertible_to<_Ros, std::span<_CharT>>)
	&& convertible_to<_Ros, std::span<const _CharT>>
      explicit
      basic_ispanstream(_Ros&& __s)
      : __istream_type(std::__addressof(_M_sb)),
	_M_sb(ios_base::in)
      {
	std::span<const _CharT> __sp(std::forward<_Ros>(__s));
	_M_sb.span({const_cast<_CharT*>(__sp.data()), __sp.size()});
      }

// [ispanstream.assign], assignment and swap
    basic_ispanstream& operator=(const basic_ispanstream&) = delete;
    basic_ispanstream& operator=(basic_ispanstream&& __rhs) = default;

void
    swap(basic_ispanstream& __rhs)
    {
      __istream_type::swap(__rhs);
      _M_sb.swap(__rhs._M_sb);
    }

// [ispanstream.members], member functions
    basic_spanbuf<_CharT, _Traits>*
    rdbuf() const noexcept
    {
      return const_cast<basic_spanbuf<_CharT, _Traits>*>(std::__addressof(_M_sb));
    }

std::span<const _CharT>
    span() const noexcept
    { return _M_sb.span(); }

void
    span(std::span<_CharT> __s) noexcept
    { return _M_sb.span(__s); }

template<typename _Ros>
      requires ranges::borrowed_range<_Ros>
	&& (!convertible_to<_Ros, std::span<_CharT>>)
	&& convertible_to<_Ros, std::span<const _CharT>>
      void
      span(_Ros&& __s) noexcept
      {
	std::span<const _CharT> __sp(std::forward<_Ros>(__s));
	_M_sb.span({const_cast<_CharT*>(__sp.data()), __sp.size()});
      }

private:
    basic_spanbuf<_CharT, _Traits> _M_sb;
  };

template<typename _CharT, typename _Traits>
  inline void
  swap(basic_ispanstream<_CharT, _Traits>& __x,
       basic_ispanstream<_CharT, _Traits>& __y)
  { __x.swap(__y); }

using ispanstream = basic_ispanstream<char>;
using wispanstream = basic_ispanstream<wchar_t>;

template<typename _CharT, typename _Traits>
  class basic_ospanstream
  : public basic_ostream<_CharT, _Traits>
  {
    using __ostream_type = basic_ostream<_CharT, _Traits>;

// [ospanstream.ctor], constructors
    explicit
    basic_ospanstream(std::span<_CharT> __s,
		      ios_base::openmode __which = ios_base::out)
    : __ostream_type(std::__addressof(_M_sb)),
      _M_sb(__s, __which | ios_base::in)
    { }

basic_ospanstream(const basic_ospanstream&) = delete;

basic_ospanstream(basic_ospanstream&& __rhs)
    : __ostream_type(std::move(__rhs)), _M_sb(std::move(__rhs._M_sb))
    {
      __ostream_type::set_rdbuf(std::addressof(_M_sb));
    }

// [ospanstream.assign], assignment and swap
    basic_ospanstream& operator=(const basic_ospanstream&) = delete;
    basic_ospanstream& operator=(basic_ospanstream&& __rhs) = default;

void
    swap(basic_ospanstream& __rhs)
    {
      __ostream_type::swap(__rhs);
      _M_sb.swap(__rhs._M_sb);
    }

// [ospanstream.members], member functions
    basic_spanbuf<_CharT, _Traits>*
    rdbuf() const noexcept
    {
      return const_cast<basic_spanbuf<_CharT, _Traits>*>(std::__addressof(_M_sb));
    }

std::span<_CharT>
    span() const noexcept
    { return _M_sb.span(); }

void
    span(std::span<_CharT> __s) noexcept
    { return _M_sb.span(__s); }

private:
    basic_spanbuf<_CharT, _Traits> _M_sb;
  };

template<typename _CharT, typename _Traits>
  inline void
  swap(basic_ospanstream<_CharT, _Traits>& __x,
       basic_ospanstream<_CharT, _Traits>& __y)
  { __x.swap(__y); }

using ospanstream = basic_ospanstream<char>;
using wospanstream = basic_ospanstream<wchar_t>;

template<typename _CharT, typename _Traits>
  class basic_spanstream
  : public basic_iostream<_CharT, _Traits>
  {
    using __iostream_type = basic_iostream<_CharT, _Traits>;

// [spanstream.ctor], constructors
    explicit
    basic_spanstream(std::span<_CharT> __s,
		     ios_base::openmode __which = ios_base::out | ios_base::in)
    : __iostream_type(std::__addressof(_M_sb)),
      _M_sb(__s, __which)
    { }

basic_spanstream(const basic_spanstream&) = delete;

basic_spanstream(basic_spanstream&& __rhs)
    : __iostream_type(std::move(__rhs)), _M_sb(std::move(__rhs._M_sb))
    {
      __iostream_type::set_rdbuf(std::addressof(_M_sb));
    }

// [spanstream.assign], assignment and swap
    basic_spanstream& operator=(const basic_spanstream&) = delete;
    basic_spanstream& operator=(basic_spanstream&& __rhs) = default;

void
    swap(basic_spanstream& __rhs)
    {
      __iostream_type::swap(__rhs);
      _M_sb.swap(__rhs._M_sb);
    }

// [spanstream.members], members
    basic_spanbuf<_CharT, _Traits>*
    rdbuf() const noexcept
    {
      return const_cast<basic_spanbuf<_CharT, _Traits>*>(std::__addressof(_M_sb));
    }

std::span<_CharT>
    span() const noexcept
    { return _M_sb.span(); }

void
    span(std::span<_CharT> __s) noexcept
    { return _M_sb.span(__s); }

private:
    basic_spanbuf<_CharT, _Traits> _M_sb;
  };

template<typename _CharT, typename _Traits>
  inline void
  swap(basic_spanstream<_CharT, _Traits>& __x,
       basic_spanstream<_CharT, _Traits>& __y)
  { __x.swap(__y); }

using spanstream = basic_spanstream<char>;
using wspanstream = basic_spanstream<wchar_t>;

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // __cpp_lib_span
#endif // C++23
#endif // _GLIBCXX_SPANSTREAM

${this.title}

Code Editor : spanstream