// Stream buffer classes -*- C++ -*-
-// Copyright (C) 1997-1999, 2000 Free Software Foundation, Inc.
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
+// 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
// ISO C++ 14882: 27.5 Stream buffers
//
-#ifndef _CPP_BITS_STREAMBUF_TCC
-#define _CPP_BITS_STREAMBUF_TCC 1
+#ifndef _STREAMBUF_TCC
+#define _STREAMBUF_TCC 1
-namespace std {
-
- template<typename _CharT, typename _Traits>
- basic_streambuf<_CharT, _Traits>::int_type
- basic_streambuf<_CharT, _Traits>::
- sbumpc()
- {
- int_type __ret;
- if (_M_in_cur && _M_in_cur < _M_in_end)
- {
- char_type __c = *gptr();
- ++_M_in_cur;
- if (_M_buf_unified && _M_mode & ios_base::out)
- ++_M_out_cur;
- __ret = traits_type::to_int_type(__c);
- }
- else
- __ret = this->uflow();
- return __ret;
- }
-
- template<typename _CharT, typename _Traits>
- basic_streambuf<_CharT, _Traits>::int_type
- basic_streambuf<_CharT, _Traits>::
- sputbackc(char_type __c)
- {
- int_type __ret;
- bool __testpos = _M_in_cur && _M_in_beg < _M_in_cur;
- bool __testne = _M_in_cur && !traits_type::eq(__c, this->gptr()[-1]);
- if (!__testpos || __testne)
- __ret = pbackfail(traits_type::to_int_type(__c));
- else
- {
- --_M_in_cur;
- if (_M_buf_unified && _M_mode & ios_base::out)
- --_M_out_cur;
- __ret = traits_type::to_int_type(*this->gptr());
- }
- return __ret;
- }
-
- template<typename _CharT, typename _Traits>
- basic_streambuf<_CharT, _Traits>::int_type
- basic_streambuf<_CharT, _Traits>::
- sungetc()
- {
- int_type __ret;
- if (_M_in_cur && _M_in_beg < _M_in_cur)
- {
- --_M_in_cur;
- if (_M_buf_unified && _M_mode & ios_base::out)
- --_M_out_cur;
- __ret = traits_type::to_int_type(*_M_in_cur);
- }
- else
- __ret = this->pbackfail();
- return __ret;
- }
-
- // Don't test against _M_buf + _M_buf_size, because _M_buf reflects
- // allocated space, and on certain (rare but entirely legal)
- // situations, there will be no allocated space yet the internal
- // buffers will still be valid. (This happens if setp is used to set
- // the internal buffer to say some externally-allocated sequence.)
- template<typename _CharT, typename _Traits>
- basic_streambuf<_CharT, _Traits>::int_type
- basic_streambuf<_CharT, _Traits>::
- sputc(char_type __c)
- {
- int_type __ret;
-
- if (_M_out_cur && _M_out_cur < _M_out_beg + _M_buf_size)
- {
- *_M_out_cur = __c;
- _M_out_cur_move(1);
- __ret = traits_type::to_int_type(__c);
- }
- else
- __ret = this->overflow(traits_type::to_int_type(__c));
- return __ret;
- }
+#pragma GCC system_header
+namespace std
+{
template<typename _CharT, typename _Traits>
streamsize
basic_streambuf<_CharT, _Traits>::
xsgetn(char_type* __s, streamsize __n)
{
- bool __testout = _M_mode & ios_base::out;
streamsize __ret = 0;
-
- if (__n)
+ while (__ret < __n)
{
- while (__ret < __n)
+ const size_t __buf_len = this->egptr() - this->gptr();
+ if (__buf_len)
{
- if (_M_in_cur < _M_in_end)
- {
- size_t __len;
- if (_M_in_cur + __n - __ret <= _M_in_end)
- __len = __n - __ret;
- else
- __len = _M_in_end - _M_in_cur;
- traits_type::copy(__s, _M_in_cur, __len);
- __ret += __len;
- __s += __len;
- _M_in_cur += __len;
- if (_M_buf_unified && __testout)
- _M_out_cur += __len;
- }
-
- if (__ret != __n)
- {
- int_type __c = this->uflow();
- if (traits_type::eq_int_type(__c, traits_type::eof()))
- break;
+ const size_t __remaining = __n - __ret;
+ const size_t __len = std::min(__buf_len, __remaining);
+ traits_type::copy(__s, this->gptr(), __len);
+ __ret += __len;
+ __s += __len;
+ this->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;
+ ++__ret;
}
+ else
+ break;
}
}
return __ret;
}
- // Don't test against _M_buf + _M_buf_size, because _M_buf reflects
- // allocated space, and on certain (rare but entirely legal)
- // situations, there will be no allocated space yet the internal
- // buffers will still be valid. (This happens if setp is used to set
- // the internal buffer to say some externally-allocated sequence.)
template<typename _CharT, typename _Traits>
streamsize
basic_streambuf<_CharT, _Traits>::
xsputn(const char_type* __s, streamsize __n)
{
streamsize __ret = 0;
-
- if (__n)
+ while (__ret < __n)
{
- while (__ret < __n)
+ const size_t __buf_len = this->epptr() - this->pptr();
+ if (__buf_len)
{
- bool __testput = _M_out_cur < _M_out_beg + _M_buf_size;
- bool __testout = _M_mode & ios_base::out;
- if (!(__testput && __testout))
- {
- int_type __c = traits_type::to_int_type(*__s);
- int_type __overfc = this->overflow(__c);
- if (traits_type::eq_int_type(__c, __overfc))
- {
- ++__ret;
- ++__s;
- }
- else
- break;
- }
-
- if (__ret != __n)
+ const size_t __remaining = __n - __ret;
+ const size_t __len = std::min(__buf_len, __remaining);
+ traits_type::copy(this->pptr(), __s, __len);
+ __ret += __len;
+ __s += __len;
+ this->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()))
{
- size_t __len;
- if (_M_out_cur + __n - __ret <= _M_out_beg + _M_buf_size)
- __len = __n - __ret;
- else
- __len = _M_out_beg + _M_buf_size - _M_out_cur;
- traits_type::copy(_M_out_cur, __s, __len);
- __ret += __len;
- __s += __len;
- _M_out_cur_move(__len);
+ ++__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. If so, then checks for __ios being zero would be
// necessary.
template<typename _CharT, typename _Traits>
streamsize
- _S_copy_streambufs(basic_ios<_CharT, _Traits>& __ios,
- basic_streambuf<_CharT, _Traits>* __sbin,
- basic_streambuf<_CharT, _Traits>* __sbout)
+ __copy_streambufs(basic_streambuf<_CharT, _Traits>* __sbin,
+ basic_streambuf<_CharT, _Traits>* __sbout)
{
- typedef typename _Traits::int_type int_type;
-
streamsize __ret = 0;
- streamsize __bufsize = __sbin->in_avail();
- streamsize __xtrct;
- bool __testout = __sbin->_M_mode & ios_base::out;
- bool __testput = __sbout->_M_mode & ios_base::out;
- try {
- while (__testput && __bufsize != -1)
- {
- __xtrct = __sbout->sputn(__sbin->gptr(), __bufsize);
- __ret += __xtrct;
- __sbin->_M_in_cur += __xtrct;
- if (__testout && __sbin->_M_buf_unified)
- __sbin->_M_out_cur += __xtrct;
- if (__xtrct == __bufsize)
- {
- int_type __c = __sbin->sgetc();
- if (__c == _Traits::eof())
- {
- __ios.setstate(ios_base::eofbit);
- break;
- }
- __bufsize = __sbin->in_avail();
- }
- else
- break;
- }
- }
- catch(exception& __fail) {
- if ((__ios.exceptions() & ios_base::failbit) != 0)
- throw;
- }
+ typename _Traits::int_type __c = __sbin->sgetc();
+ while (!_Traits::eq_int_type(__c, _Traits::eof()))
+ {
+ const size_t __n = __sbin->egptr() - __sbin->gptr();
+ if (__n > 1)
+ {
+ const size_t __wrote = __sbout->sputn(__sbin->gptr(), __n);
+ __sbin->gbump(__wrote);
+ __ret += __wrote;
+ if (__wrote < __n)
+ break;
+ __c = __sbin->underflow();
+ }
+ else
+ {
+ __c = __sbout->sputc(_Traits::to_char_type(__c));
+ if (_Traits::eq_int_type(__c, _Traits::eof()))
+ break;
+ ++__ret;
+ __c = __sbin->snextc();
+ }
+ }
return __ret;
}
-} // namespace std
-
-#endif // _CPP_BITS_STREAMBUF_TCC
-
-
+ // Inhibit implicit instantiations for required instantiations,
+ // which are defined via explicit instantiations elsewhere.
+ // NB: This syntax is a GNU extension.
+#if _GLIBCXX_EXTERN_TEMPLATE
+ extern template class basic_streambuf<char>;
+ extern template
+ streamsize
+ __copy_streambufs(basic_streambuf<char>*, basic_streambuf<char>*);
+#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>*);
+#endif
+#endif
+} // namespace std
+#endif
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