// Streambuf iterators
-// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
-// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
// As a special exception, you may use this file as part of a free software
#include <streambuf>
#include <debug/debug.h>
-// NB: Should specialize copy, find algorithms for streambuf iterators.
-
-namespace std
-{
+_GLIBCXX_BEGIN_NAMESPACE(std)
+
// 24.5.3 Template class istreambuf_iterator
+ /// Provides input iterator semantics for streambufs.
template<typename _CharT, typename _Traits>
class istreambuf_iterator
: public iterator<input_iterator_tag, _CharT, typename _Traits::off_type,
- _CharT*, _CharT&>
+ _CharT*, _CharT&>
{
public:
// Types:
- typedef _CharT char_type;
- typedef _Traits traits_type;
- typedef typename _Traits::int_type int_type;
- typedef basic_streambuf<_CharT, _Traits> streambuf_type;
- typedef basic_istream<_CharT, _Traits> istream_type;
+ //@{
+ /// Public typedefs
+ typedef _CharT char_type;
+ typedef _Traits traits_type;
+ typedef typename _Traits::int_type int_type;
+ typedef basic_streambuf<_CharT, _Traits> streambuf_type;
+ typedef basic_istream<_CharT, _Traits> istream_type;
+ //@}
+
+ template<typename _CharT2>
+ friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
+ ostreambuf_iterator<_CharT2> >::__type
+ copy(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
+ ostreambuf_iterator<_CharT2>);
+
+ template<typename _CharT2>
+ friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
+ _CharT2*>::__type
+ __copy_aux(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
+ _CharT2*);
+
+ template<typename _CharT2>
+ friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
+ istreambuf_iterator<_CharT2> >::__type
+ find(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
+ const _CharT2&);
private:
- // 24.5.3 istreambuf_iterator
- // p 1
+ // 24.5.3 istreambuf_iterator
+ // p 1
// If the end of stream is reached (streambuf_type::sgetc()
// returns traits_type::eof()), the iterator becomes equal to
// the "end of stream" iterator value.
// NB: This implementation assumes the "end of stream" value
// is EOF, or -1.
- mutable streambuf_type* _M_sbuf;
- int_type _M_c;
+ mutable streambuf_type* _M_sbuf;
+ mutable int_type _M_c;
public:
- istreambuf_iterator() throw()
+ /// Construct end of input stream iterator.
+ istreambuf_iterator() throw()
: _M_sbuf(0), _M_c(traits_type::eof()) { }
-
+
+ /// Construct start of input stream iterator.
istreambuf_iterator(istream_type& __s) throw()
: _M_sbuf(__s.rdbuf()), _M_c(traits_type::eof()) { }
+ /// Construct start of streambuf iterator.
istreambuf_iterator(streambuf_type* __s) throw()
: _M_sbuf(__s), _M_c(traits_type::eof()) { }
-
- // NB: The result of operator*() on an end of stream is undefined.
- char_type
+
+ /// Return the current character pointed to by iterator. This returns
+ /// streambuf.sgetc(). It cannot be assigned. NB: The result of
+ /// operator*() on an end of stream is undefined.
+ char_type
operator*() const
- {
+ {
#ifdef _GLIBCXX_DEBUG_PEDANTIC
// Dereferencing a past-the-end istreambuf_iterator is a
// libstdc++ extension
__glibcxx_requires_cond(!_M_at_eof(),
_M_message(__gnu_debug::__msg_deref_istreambuf)
- ._M_iterator(*this));
+ ._M_iterator(*this));
#endif
- return traits_type::to_char_type(_M_get());
+ return traits_type::to_char_type(_M_get());
}
-
- istreambuf_iterator&
+
+ /// Advance the iterator. Calls streambuf.sbumpc().
+ istreambuf_iterator&
operator++()
- {
+ {
__glibcxx_requires_cond(!_M_at_eof(),
_M_message(__gnu_debug::__msg_inc_istreambuf)
- ._M_iterator(*this));
- const int_type __eof = traits_type::eof();
- if (_M_sbuf && traits_type::eq_int_type(_M_sbuf->sbumpc(), __eof))
- _M_sbuf = 0;
- else
- _M_c = __eof;
- return *this;
+ ._M_iterator(*this));
+ if (_M_sbuf)
+ {
+ _M_sbuf->sbumpc();
+ _M_c = traits_type::eof();
+ }
+ return *this;
}
+ /// Advance the iterator. Calls streambuf.sbumpc().
istreambuf_iterator
operator++(int)
{
__glibcxx_requires_cond(!_M_at_eof(),
_M_message(__gnu_debug::__msg_inc_istreambuf)
- ._M_iterator(*this));
+ ._M_iterator(*this));
- const int_type __eof = traits_type::eof();
istreambuf_iterator __old = *this;
- if (_M_sbuf
- && traits_type::eq_int_type((__old._M_c = _M_sbuf->sbumpc()),
- __eof))
- _M_sbuf = 0;
- else
- _M_c = __eof;
- return __old;
+ if (_M_sbuf)
+ {
+ __old._M_c = _M_sbuf->sbumpc();
+ _M_c = traits_type::eof();
+ }
+ return __old;
}
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 110 istreambuf_iterator::equal not const
// NB: there is also number 111 (NAD, Future) pending on this function.
- bool
+ /// Return true both iterators are end or both are not end.
+ bool
equal(const istreambuf_iterator& __b) const
{
const bool __thiseof = _M_at_eof();
const bool __beof = __b._M_at_eof();
- return (__thiseof && __beof || (!__thiseof && !__beof));
+ return ((__thiseof && __beof) || (!__thiseof && !__beof));
}
private:
- int_type
+ int_type
_M_get() const
- {
+ {
const int_type __eof = traits_type::eof();
int_type __ret = __eof;
if (_M_sbuf)
- {
+ {
if (!traits_type::eq_int_type(_M_c, __eof))
__ret = _M_c;
- else
- if (traits_type::eq_int_type((__ret = _M_sbuf->sgetc()), __eof))
- _M_sbuf = 0;
+ else if (!traits_type::eq_int_type((__ret = _M_sbuf->sgetc()),
+ __eof))
+ _M_c = __ret;
+ else
+ _M_sbuf = 0;
}
return __ret;
}
- bool
+ bool
_M_at_eof() const
{
const int_type __eof = traits_type::eof();
};
template<typename _CharT, typename _Traits>
- inline bool
+ inline bool
operator==(const istreambuf_iterator<_CharT, _Traits>& __a,
const istreambuf_iterator<_CharT, _Traits>& __b)
{ return __a.equal(__b); }
template<typename _CharT, typename _Traits>
- inline bool
+ inline bool
operator!=(const istreambuf_iterator<_CharT, _Traits>& __a,
const istreambuf_iterator<_CharT, _Traits>& __b)
{ return !__a.equal(__b); }
+ /// Provides output iterator semantics for streambufs.
template<typename _CharT, typename _Traits>
class ostreambuf_iterator
: public iterator<output_iterator_tag, void, void, void, void>
{
public:
// Types:
+ //@{
+ /// Public typedefs
typedef _CharT char_type;
typedef _Traits traits_type;
typedef basic_streambuf<_CharT, _Traits> streambuf_type;
typedef basic_ostream<_CharT, _Traits> ostream_type;
+ //@}
+
+ template<typename _CharT2>
+ friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value,
+ ostreambuf_iterator<_CharT2> >::__type
+ copy(istreambuf_iterator<_CharT2>, istreambuf_iterator<_CharT2>,
+ ostreambuf_iterator<_CharT2>);
private:
- streambuf_type* _M_sbuf;
- bool _M_failed;
+ streambuf_type* _M_sbuf;
+ bool _M_failed;
public:
+ /// Construct output iterator from ostream.
ostreambuf_iterator(ostream_type& __s) throw ()
: _M_sbuf(__s.rdbuf()), _M_failed(!_M_sbuf) { }
-
+
+ /// Construct output iterator from streambuf.
ostreambuf_iterator(streambuf_type* __s) throw ()
: _M_sbuf(__s), _M_failed(!_M_sbuf) { }
- ostreambuf_iterator&
+ /// Write character to streambuf. Calls streambuf.sputc().
+ ostreambuf_iterator&
operator=(_CharT __c)
{
- if (!_M_failed &&
+ if (!_M_failed &&
_Traits::eq_int_type(_M_sbuf->sputc(__c), _Traits::eof()))
_M_failed = true;
return *this;
}
- ostreambuf_iterator&
+ /// Return *this.
+ ostreambuf_iterator&
operator*()
{ return *this; }
- ostreambuf_iterator&
+ /// Return *this.
+ ostreambuf_iterator&
operator++(int)
{ return *this; }
- ostreambuf_iterator&
+ /// Return *this.
+ ostreambuf_iterator&
operator++()
{ return *this; }
- bool
+ /// Return true if previous operator=() failed.
+ bool
failed() const throw()
{ return _M_failed; }
- ostreambuf_iterator&
+ ostreambuf_iterator&
_M_put(const _CharT* __ws, streamsize __len)
{
if (__builtin_expect(!_M_failed, true)
- && __builtin_expect(this->_M_sbuf->sputn(__ws, __len) != __len, false))
+ && __builtin_expect(this->_M_sbuf->sputn(__ws, __len) != __len,
+ false))
_M_failed = true;
return *this;
}
};
-} // namespace std
+
+ // Overloads for streambuf iterators.
+ template<typename _CharT>
+ typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
+ ostreambuf_iterator<_CharT> >::__type
+ copy(istreambuf_iterator<_CharT> __first,
+ istreambuf_iterator<_CharT> __last,
+ ostreambuf_iterator<_CharT> __result)
+ {
+ if (__first._M_sbuf && !__last._M_sbuf && !__result._M_failed)
+ {
+ bool __ineof;
+ __copy_streambufs_eof(__first._M_sbuf, __result._M_sbuf, __ineof);
+ if (!__ineof)
+ __result._M_failed = true;
+ }
+ return __result;
+ }
+
+ template<typename _CharT>
+ typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
+ ostreambuf_iterator<_CharT> >::__type
+ __copy_aux(_CharT* __first, _CharT* __last,
+ ostreambuf_iterator<_CharT> __result)
+ {
+ const streamsize __num = __last - __first;
+ if (__num > 0)
+ __result._M_put(__first, __num);
+ return __result;
+ }
+
+ template<typename _CharT>
+ typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
+ ostreambuf_iterator<_CharT> >::__type
+ __copy_aux(const _CharT* __first, const _CharT* __last,
+ ostreambuf_iterator<_CharT> __result)
+ {
+ const streamsize __num = __last - __first;
+ if (__num > 0)
+ __result._M_put(__first, __num);
+ return __result;
+ }
+
+ template<typename _CharT>
+ typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
+ _CharT*>::__type
+ __copy_aux(istreambuf_iterator<_CharT> __first,
+ istreambuf_iterator<_CharT> __last, _CharT* __result)
+ {
+ typedef istreambuf_iterator<_CharT> __is_iterator_type;
+ typedef typename __is_iterator_type::traits_type traits_type;
+ typedef typename __is_iterator_type::streambuf_type streambuf_type;
+ typedef typename traits_type::int_type int_type;
+
+ if (__first._M_sbuf && !__last._M_sbuf)
+ {
+ streambuf_type* __sb = __first._M_sbuf;
+ int_type __c = __sb->sgetc();
+ while (!traits_type::eq_int_type(__c, traits_type::eof()))
+ {
+ const streamsize __n = __sb->egptr() - __sb->gptr();
+ if (__n > 1)
+ {
+ traits_type::copy(__result, __sb->gptr(), __n);
+ __sb->gbump(__n);
+ __result += __n;
+ __c = __sb->underflow();
+ }
+ else
+ {
+ *__result++ = traits_type::to_char_type(__c);
+ __c = __sb->snextc();
+ }
+ }
+ }
+ return __result;
+ }
+
+ template<typename _CharT>
+ typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value,
+ istreambuf_iterator<_CharT> >::__type
+ find(istreambuf_iterator<_CharT> __first,
+ istreambuf_iterator<_CharT> __last, const _CharT& __val)
+ {
+ typedef istreambuf_iterator<_CharT> __is_iterator_type;
+ typedef typename __is_iterator_type::traits_type traits_type;
+ typedef typename __is_iterator_type::streambuf_type streambuf_type;
+ typedef typename traits_type::int_type int_type;
+
+ if (__first._M_sbuf && !__last._M_sbuf)
+ {
+ const int_type __ival = traits_type::to_int_type(__val);
+ streambuf_type* __sb = __first._M_sbuf;
+ int_type __c = __sb->sgetc();
+ while (!traits_type::eq_int_type(__c, traits_type::eof())
+ && !traits_type::eq_int_type(__c, __ival))
+ {
+ streamsize __n = __sb->egptr() - __sb->gptr();
+ if (__n > 1)
+ {
+ const _CharT* __p = traits_type::find(__sb->gptr(),
+ __n, __val);
+ if (__p)
+ __n = __p - __sb->gptr();
+ __sb->gbump(__n);
+ __c = __sb->sgetc();
+ }
+ else
+ __c = __sb->snextc();
+ }
+
+ if (!traits_type::eq_int_type(__c, traits_type::eof()))
+ __first._M_c = __c;
+ else
+ __first._M_sbuf = 0;
+ }
+ return __first;
+ }
+
+_GLIBCXX_END_NAMESPACE
+
#endif
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