FM / bits

/usr/include/c++/8/bits

Name	Size	Mode	Actions
algorithmfwd.h	21736	0644	edit dl rm
allocated_ptr.h	3293	0644	edit dl rm
allocator.h	7569	0644	edit dl rm
alloc_traits.h	20066	0644	edit dl rm
atomic_base.h	23842	0644	edit dl rm
atomic_futex.h	9576	0644	edit dl rm
atomic_lockfree_defines.h	2253	0644	edit dl rm
basic_ios.h	16074	0644	edit dl rm
basic_ios.tcc	6083	0644	edit dl rm
basic_string.h	242697	0644	edit dl rm
basic_string.tcc	53755	0644	edit dl rm
boost_concept_check.h	27161	0644	edit dl rm
c++0x_warning.h	1474	0644	edit dl rm
char_traits.h	20915	0644	edit dl rm
codecvt.h	21289	0644	edit dl rm
concept_check.h	3423	0644	edit dl rm
cpp_type_traits.h	9789	0644	edit dl rm
cxxabi_forced.h	1811	0644	edit dl rm
cxxabi_init_exception.h	2220	0644	edit dl rm
deque.tcc	34122	0644	edit dl rm
enable_special_members.h	12387	0644	edit dl rm
exception.h	2280	0644	edit dl rm
exception_defines.h	1645	0644	edit dl rm
exception_ptr.h	5981	0644	edit dl rm
forward_list.h	48919	0644	edit dl rm
forward_list.tcc	13169	0644	edit dl rm
fstream.tcc	32799	0644	edit dl rm
fs_dir.h	14724	0644	edit dl rm
fs_fwd.h	10279	0644	edit dl rm
fs_ops.h	9730	0644	edit dl rm
fs_path.h	32894	0644	edit dl rm
functexcept.h	3254	0644	edit dl rm
functional_hash.h	8238	0644	edit dl rm
gslice.h	5518	0644	edit dl rm
gslice_array.h	7769	0644	edit dl rm
hashtable.h	73785	0644	edit dl rm
hashtable_policy.h	67971	0644	edit dl rm
hash_bytes.h	2146	0644	edit dl rm
indirect_array.h	7861	0644	edit dl rm
invoke.h	3657	0644	edit dl rm
ios_base.h	31023	0644	edit dl rm
istream.tcc	31093	0644	edit dl rm
list.tcc	15976	0644	edit dl rm
localefwd.h	5646	0644	edit dl rm
locale_classes.h	24897	0644	edit dl rm
locale_classes.tcc	8375	0644	edit dl rm
locale_conv.h	16097	0644	edit dl rm
locale_facets.h	92328	0644	edit dl rm
locale_facets.tcc	39548	0644	edit dl rm
locale_facets_nonio.h	68980	0644	edit dl rm
locale_facets_nonio.tcc	45280	0644	edit dl rm
mask_array.h	7595	0644	edit dl rm
memoryfwd.h	2453	0644	edit dl rm
move.h	6529	0644	edit dl rm
nested_exception.h	4802	0644	edit dl rm
node_handle.h	8216	0644	edit dl rm
ostream.tcc	12315	0644	edit dl rm
ostream_insert.h	4002	0644	edit dl rm
parse_numbers.h	7944	0644	edit dl rm
postypes.h	8208	0644	edit dl rm
predefined_ops.h	9083	0644	edit dl rm
ptr_traits.h	6626	0644	edit dl rm
quoted_string.h	5053	0644	edit dl rm
random.h	175250	0644	edit dl rm
random.tcc	105590	0644	edit dl rm
range_access.h	10030	0644	edit dl rm
refwrap.h	11884	0644	edit dl rm
regex.h	97402	0644	edit dl rm
regex.tcc	16565	0644	edit dl rm
regex_automaton.h	10722	0644	edit dl rm
regex_automaton.tcc	7838	0644	edit dl rm
regex_compiler.h	18050	0644	edit dl rm
regex_compiler.tcc	19288	0644	edit dl rm
regex_constants.h	14708	0644	edit dl rm
regex_error.h	4904	0644	edit dl rm
regex_executor.h	7488	0644	edit dl rm
regex_executor.tcc	18841	0644	edit dl rm
regex_scanner.h	7088	0644	edit dl rm
regex_scanner.tcc	15009	0644	edit dl rm
shared_ptr.h	23433	0644	edit dl rm
shared_ptr_atomic.h	9769	0644	edit dl rm
shared_ptr_base.h	54286	0644	edit dl rm
slice_array.h	9348	0644	edit dl rm
specfun.h	47051	0644	edit dl rm
sstream.tcc	10142	0644	edit dl rm
std_abs.h	3266	0644	edit dl rm
std_function.h	23260	0644	edit dl rm
std_mutex.h	9298	0644	edit dl rm
stl_algo.h	214294	0644	edit dl rm
stl_algobase.h	50494	0644	edit dl rm
stl_bvector.h	33728	0644	edit dl rm
stl_construct.h	7397	0644	edit dl rm
stl_deque.h	78575	0644	edit dl rm
stl_function.h	41745	0644	edit dl rm
stl_heap.h	20206	0644	edit dl rm
stl_iterator.h	42291	0644	edit dl rm
stl_iterator_base_funcs.h	8178	0644	edit dl rm
stl_iterator_base_types.h	8680	0644	edit dl rm
stl_list.h	67558	0644	edit dl rm
stl_map.h	52791	0644	edit dl rm
stl_multimap.h	41557	0644	edit dl rm
stl_multiset.h	35809	0644	edit dl rm
stl_numeric.h	13832	0644	edit dl rm
stl_pair.h	18642	0644	edit dl rm
stl_queue.h	24073	0644	edit dl rm
stl_raw_storage_iter.h	3830	0644	edit dl rm
stl_relops.h	4594	0644	edit dl rm
stl_set.h	36125	0644	edit dl rm
stl_stack.h	11938	0644	edit dl rm
stl_tempbuf.h	8344	0644	edit dl rm
stl_tree.h	74904	0644	edit dl rm
stl_uninitialized.h	27709	0644	edit dl rm
stl_vector.h	60534	0644	edit dl rm
streambuf.tcc	4929	0644	edit dl rm
streambuf_iterator.h	13758	0644	edit dl rm
stream_iterator.h	6654	0644	edit dl rm
stringfwd.h	2607	0644	edit dl rm
string_view.tcc	6698	0644	edit dl rm
uniform_int_dist.h	10081	0644	edit dl rm
unique_ptr.h	25984	0644	edit dl rm
unordered_map.h	75341	0644	edit dl rm
unordered_set.h	59148	0644	edit dl rm
uses_allocator.h	6525	0644	edit dl rm
valarray_after.h	22655	0644	edit dl rm
valarray_array.h	21807	0644	edit dl rm
valarray_array.tcc	7254	0644	edit dl rm
valarray_before.h	18513	0644	edit dl rm
vector.tcc	29644	0644	edit dl rm

Edit: /usr/include/c++/8/bits/streambuf.tcc (4929B)

// Stream buffer classes -*- C++ -*-

// Copyright (C) 1997-2018 Free Software Foundation, Inc.
//
// 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 bits/streambuf.tcc
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{streambuf}
 */

//
// ISO C++ 14882: 27.5  Stream buffers
//

#ifndef _STREAMBUF_TCC
#define _STREAMBUF_TCC 1

#pragma GCC system_header

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

template<typename _CharT, typename _Traits>
    streamsize
    basic_streambuf<_CharT, _Traits>::
    xsgetn(char_type* __s, streamsize __n)
    {
      streamsize __ret = 0;
      while (__ret < __n)
	{
	  const streamsize __buf_len = this->egptr() - this->gptr();
	  if (__buf_len)
	    {
	      const streamsize __remaining = __n - __ret;
	      const streamsize __len = std::min(__buf_len, __remaining);
	      traits_type::copy(__s, this->gptr(), __len);
	      __ret += __len;
	      __s += __len;
	      this->__safe_gbump(__len);
	    }

if (__ret < __n)
	    {
	      const int_type __c = this->uflow();
	      if (!traits_type::eq_int_type(__c, traits_type::eof()))
		{
		  traits_type::assign(*__s++, traits_type::to_char_type(__c));
		  ++__ret;
		}
	      else
		break;
	    }
	}
      return __ret;
    }

template<typename _CharT, typename _Traits>
    streamsize
    basic_streambuf<_CharT, _Traits>::
    xsputn(const char_type* __s, streamsize __n)
    {
      streamsize __ret = 0;
      while (__ret < __n)
	{
	  const streamsize __buf_len = this->epptr() - this->pptr();
	  if (__buf_len)
	    {
	      const streamsize __remaining = __n - __ret;
	      const streamsize __len = std::min(__buf_len, __remaining);
	      traits_type::copy(this->pptr(), __s, __len);
	      __ret += __len;
	      __s += __len;
	      this->__safe_pbump(__len);
	    }

if (__ret < __n)
	    {
	      int_type __c = this->overflow(traits_type::to_int_type(*__s));
	      if (!traits_type::eq_int_type(__c, traits_type::eof()))
		{
		  ++__ret;
		  ++__s;
		}
	      else
		break;
	    }
	}
      return __ret;
    }

// Conceivably, this could be used to implement buffer-to-buffer
  // copies, if this was ever desired in an un-ambiguous way by the
  // standard.
  template<typename _CharT, typename _Traits>
    streamsize
    __copy_streambufs_eof(basic_streambuf<_CharT, _Traits>* __sbin,
			  basic_streambuf<_CharT, _Traits>* __sbout,
			  bool& __ineof)
    {
      streamsize __ret = 0;
      __ineof = true;
      typename _Traits::int_type __c = __sbin->sgetc();
      while (!_Traits::eq_int_type(__c, _Traits::eof()))
	{
	  __c = __sbout->sputc(_Traits::to_char_type(__c));
	  if (_Traits::eq_int_type(__c, _Traits::eof()))
	    {
	      __ineof = false;
	      break;
	    }
	  ++__ret;
	  __c = __sbin->snextc();
	}
      return __ret;
    }

template<typename _CharT, typename _Traits>
    inline streamsize
    __copy_streambufs(basic_streambuf<_CharT, _Traits>* __sbin,
		      basic_streambuf<_CharT, _Traits>* __sbout)
    {
      bool __ineof;
      return __copy_streambufs_eof(__sbin, __sbout, __ineof);
    }

// Inhibit implicit instantiations for required instantiations,
  // which are defined via explicit instantiations elsewhere.
#if _GLIBCXX_EXTERN_TEMPLATE
  extern template class basic_streambuf<char>;
  extern template
    streamsize
    __copy_streambufs(basic_streambuf<char>*,
		      basic_streambuf<char>*);
  extern template
    streamsize
    __copy_streambufs_eof(basic_streambuf<char>*,
			  basic_streambuf<char>*, bool&);

#ifdef _GLIBCXX_USE_WCHAR_T
  extern template class basic_streambuf<wchar_t>;
  extern template
    streamsize
    __copy_streambufs(basic_streambuf<wchar_t>*,
		      basic_streambuf<wchar_t>*);
  extern template
    streamsize
    __copy_streambufs_eof(basic_streambuf<wchar_t>*,
			  basic_streambuf<wchar_t>*, bool&);
#endif
#endif

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std

#endif

cmd: