summaryrefslogtreecommitdiffstats
path: root/contrib/libstdc++/include/std/std_streambuf.h
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/libstdc++/include/std/std_streambuf.h')
-rw-r--r--contrib/libstdc++/include/std/std_streambuf.h361
1 files changed, 104 insertions, 257 deletions
diff --git a/contrib/libstdc++/include/std/std_streambuf.h b/contrib/libstdc++/include/std/std_streambuf.h
index a1958c1..42b3d78 100644
--- a/contrib/libstdc++/include/std/std_streambuf.h
+++ b/contrib/libstdc++/include/std/std_streambuf.h
@@ -1,6 +1,6 @@
// Stream buffer classes -*- C++ -*-
-// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
@@ -37,14 +37,13 @@
* in your programs, rather than any of the "st[dl]_*.h" implementation files.
*/
-#ifndef _CPP_STREAMBUF
-#define _CPP_STREAMBUF 1
+#ifndef _CLIBXX_STREAMBUF
+#define _CLIBXX_STREAMBUF 1
#pragma GCC system_header
#include <bits/c++config.h>
#include <iosfwd>
-#include <cstdio> // For SEEK_SET, SEEK_CUR, SEEK_END
#include <bits/localefwd.h>
#include <bits/ios_base.h>
@@ -57,8 +56,7 @@ namespace std
*/
template<typename _CharT, typename _Traits>
streamsize
- __copy_streambufs(basic_ios<_CharT, _Traits>& _ios,
- basic_streambuf<_CharT, _Traits>* __sbin,
+ __copy_streambufs(basic_streambuf<_CharT, _Traits>* __sbin,
basic_streambuf<_CharT, _Traits>* __sbout);
/**
@@ -141,12 +139,10 @@ namespace std
//@{
/**
* @if maint
- * These are non-standard types.
+ * This is a non-standard type.
* @endif
*/
- typedef ctype<char_type> __ctype_type;
typedef basic_streambuf<char_type, traits_type> __streambuf_type;
- typedef typename traits_type::state_type __state_type;
//@}
friend class basic_ios<char_type, traits_type>;
@@ -156,42 +152,10 @@ namespace std
friend class ostreambuf_iterator<char_type, traits_type>;
friend streamsize
- __copy_streambufs<>(basic_ios<char_type, traits_type>& __ios,
- __streambuf_type* __sbin,__streambuf_type* __sbout);
+ __copy_streambufs<>(__streambuf_type* __sbin,
+ __streambuf_type* __sbout);
protected:
- /**
- * @if maint
- * Pointer to the beginning of internally-allocated space. Filebuf
- * manually allocates/deallocates this, whereas stringstreams attempt
- * to use the built-in intelligence of the string class. If you are
- * managing memory, set this. If not, leave it NULL.
- * @endif
- */
- char_type* _M_buf;
-
- /**
- * @if maint
- * Actual size of allocated internal buffer, in bytes.
- * @endif
- */
- size_t _M_buf_size;
-
- /**
- * @if maint
- * Optimal or preferred size of internal buffer, in bytes.
- * @endif
- */
- size_t _M_buf_size_opt;
-
- /**
- * @if maint
- * True iff _M_in_* and _M_out_* buffers should always point to
- * the same place. True for fstreams, false for sstreams.
- * @endif
- */
- bool _M_buf_unified;
-
//@{
/**
* @if maint
@@ -202,20 +166,12 @@ namespace std
* - put == output == write
* @endif
*/
- char_type* _M_in_beg; // Start of get area.
- char_type* _M_in_cur; // Current read area.
- char_type* _M_in_end; // End of get area.
- char_type* _M_out_beg; // Start of put area.
- char_type* _M_out_cur; // Current put area.
- char_type* _M_out_end; // End of put area.
- //@}
-
- /**
- * @if maint
- * Place to stash in || out || in | out settings for current streambuf.
- * @endif
- */
- ios_base::openmode _M_mode;
+ char_type* _M_in_beg; // Start of get area.
+ char_type* _M_in_cur; // Current read area.
+ char_type* _M_in_end; // End of get area.
+ char_type* _M_out_beg; // Start of put area.
+ char_type* _M_out_cur; // Current put area.
+ char_type* _M_out_end; // End of put area.
/**
* @if maint
@@ -224,147 +180,11 @@ namespace std
*/
locale _M_buf_locale;
- /**
- * @if maint
- * True iff locale is initialized.
- * @endif
- */
- bool _M_buf_locale_init;
-
- //@{
- /**
- * @if maint
- * Necessary bits for putback buffer management. Only used in
- * the basic_filebuf class, as necessary for the standard
- * requirements. The only basic_streambuf member function that
- * needs access to these data members is in_avail...
- *
- * @note pbacks of over one character are not currently supported.
- * @endif
- */
- static const size_t _S_pback_size = 1;
- char_type _M_pback[_S_pback_size];
- char_type* _M_pback_cur_save;
- char_type* _M_pback_end_save;
- bool _M_pback_init;
- //@}
-
- /**
- * @if maint
- * Yet unused.
- * @endif
- */
- fpos<__state_type> _M_pos;
-
- // Initializes pback buffers, and moves normal buffers to safety.
- // Assumptions:
- // _M_in_cur has already been moved back
- void
- _M_pback_create()
- {
- if (!_M_pback_init)
- {
- size_t __dist = _M_in_end - _M_in_cur;
- size_t __len = min(_S_pback_size, __dist);
- traits_type::copy(_M_pback, _M_in_cur, __len);
- _M_pback_cur_save = _M_in_cur;
- _M_pback_end_save = _M_in_end;
- this->setg(_M_pback, _M_pback, _M_pback + __len);
- _M_pback_init = true;
- }
- }
-
- // Deactivates pback buffer contents, and restores normal buffer.
- // Assumptions:
- // The pback buffer has only moved forward.
- void
- _M_pback_destroy() throw()
- {
- if (_M_pback_init)
- {
- // Length _M_in_cur moved in the pback buffer.
- size_t __off_cur = _M_in_cur - _M_pback;
-
- // For in | out buffers, the end can be pushed back...
- size_t __off_end = 0;
- size_t __pback_len = _M_in_end - _M_pback;
- size_t __save_len = _M_pback_end_save - _M_buf;
- if (__pback_len > __save_len)
- __off_end = __pback_len - __save_len;
-
- this->setg(_M_buf, _M_pback_cur_save + __off_cur,
- _M_pback_end_save + __off_end);
- _M_pback_cur_save = NULL;
- _M_pback_end_save = NULL;
- _M_pback_init = false;
- }
- }
-
- // Correctly sets the _M_in_cur pointer, and bumps the
- // _M_out_cur pointer as well if necessary.
- void
- _M_in_cur_move(off_type __n) // argument needs to be +-
- {
- bool __testout = _M_out_cur;
- _M_in_cur += __n;
- if (__testout && _M_buf_unified)
- _M_out_cur += __n;
- }
-
- // Correctly sets the _M_out_cur pointer, and bumps the
- // appropriate _M_*_end pointers as well. Necessary for the
- // un-tied stringbufs, in in|out mode.
- // Invariant:
- // __n + _M_out_[cur, end] <= _M_buf + _M_buf_size
- // Assuming all _M_*_[beg, cur, end] pointers are operating on
- // the same range:
- // _M_buf <= _M_*_ <= _M_buf + _M_buf_size
- void
- _M_out_cur_move(off_type __n) // argument needs to be +-
- {
- bool __testin = _M_in_cur;
-
- _M_out_cur += __n;
- if (__testin && _M_buf_unified)
- _M_in_cur += __n;
- if (_M_out_cur > _M_out_end)
- {
- _M_out_end = _M_out_cur;
- // NB: in | out buffers drag the _M_in_end pointer along...
- if (__testin)
- _M_in_end += __n;
- }
- }
-
- // Return the size of the output buffer. This depends on the
- // buffer in use: allocated buffers have a stored size in
- // _M_buf_size and setbuf() buffers don't.
- off_type
- _M_out_buf_size()
- {
- off_type __ret = 0;
- if (_M_out_cur)
- {
- // Using allocated buffer.
- if (_M_out_beg == _M_buf)
- __ret = _M_out_beg + _M_buf_size - _M_out_cur;
- // Using non-allocated buffer.
- else
- __ret = _M_out_end - _M_out_cur;
- }
- return __ret;
- }
-
public:
/// Destructor deallocates no buffer space.
virtual
~basic_streambuf()
- {
- _M_buf_unified = false;
- _M_buf_size = 0;
- _M_buf_size_opt = 0;
- _M_mode = ios_base::openmode(0);
- }
+ { }
// [27.5.2.2.1] locales
/**
@@ -379,6 +199,7 @@ namespace std
{
locale __tmp(this->getloc());
this->imbue(__loc);
+ _M_buf_locale = __loc;
return __tmp;
}
@@ -433,21 +254,8 @@ namespace std
streamsize
in_avail()
{
- streamsize __ret;
- if (_M_in_cur && _M_in_cur < _M_in_end)
- {
- if (_M_pback_init)
- {
- size_t __save_len = _M_pback_end_save - _M_pback_cur_save;
- size_t __pback_len = _M_in_cur - _M_pback;
- __ret = __save_len - __pback_len;
- }
- else
- __ret = this->egptr() - this->gptr();
- }
- else
- __ret = this->showmanyc();
- return __ret;
+ const streamsize __ret = this->egptr() - this->gptr();
+ return __ret ? __ret : this->showmanyc();
}
/**
@@ -460,9 +268,11 @@ namespace std
int_type
snextc()
{
- int_type __eof = traits_type::eof();
- return (traits_type::eq_int_type(this->sbumpc(), __eof)
- ? __eof : this->sgetc());
+ int_type __ret = traits_type::eof();
+ if (__builtin_expect(!traits_type::eq_int_type(this->sbumpc(),
+ __ret), true))
+ __ret = this->sgetc();
+ return __ret;
}
/**
@@ -474,7 +284,18 @@ namespace std
* @c uflow().
*/
int_type
- sbumpc();
+ sbumpc()
+ {
+ int_type __ret;
+ if (__builtin_expect(this->gptr() < this->egptr(), true))
+ {
+ __ret = traits_type::to_int_type(*this->gptr());
+ this->gbump(1);
+ }
+ else
+ __ret = this->uflow();
+ return __ret;
+ }
/**
* @brief Getting the next character.
@@ -488,8 +309,8 @@ namespace std
sgetc()
{
int_type __ret;
- if (_M_in_cur && _M_in_cur < _M_in_end)
- __ret = traits_type::to_int_type(*(this->gptr()));
+ if (__builtin_expect(this->gptr() < this->egptr(), true))
+ __ret = traits_type::to_int_type(*this->gptr());
else
__ret = this->underflow();
return __ret;
@@ -518,7 +339,20 @@ namespace std
* fetched from the input stream will be @a c.
*/
int_type
- sputbackc(char_type __c);
+ sputbackc(char_type __c)
+ {
+ int_type __ret;
+ const bool __testpos = this->eback() < this->gptr();
+ if (__builtin_expect(!__testpos ||
+ !traits_type::eq(__c, this->gptr()[-1]), false))
+ __ret = this->pbackfail(traits_type::to_int_type(__c));
+ else
+ {
+ this->gbump(-1);
+ __ret = traits_type::to_int_type(*this->gptr());
+ }
+ return __ret;
+ }
/**
* @brief Moving backwards in the input stream.
@@ -530,7 +364,18 @@ namespace std
* "gotten".
*/
int_type
- sungetc();
+ sungetc()
+ {
+ int_type __ret;
+ if (__builtin_expect(this->eback() < this->gptr(), true))
+ {
+ this->gbump(-1);
+ __ret = traits_type::to_int_type(*this->gptr());
+ }
+ else
+ __ret = this->pbackfail();
+ return __ret;
+ }
// [27.5.2.2.5] put area
/**
@@ -546,7 +391,19 @@ namespace std
* position is not available, returns @c overflow(c).
*/
int_type
- sputc(char_type __c);
+ sputc(char_type __c)
+ {
+ int_type __ret;
+ if (__builtin_expect(this->pptr() < this->epptr(), true))
+ {
+ *this->pptr() = __c;
+ this->pbump(1);
+ __ret = traits_type::to_int_type(__c);
+ }
+ else
+ __ret = this->overflow(traits_type::to_int_type(__c));
+ return __ret;
+ }
/**
* @brief Entry point for all single-character output functions.
@@ -574,12 +431,9 @@ namespace std
* - this is not an error
*/
basic_streambuf()
- : _M_buf(NULL), _M_buf_size(0), _M_buf_size_opt(BUFSIZ),
- _M_buf_unified(false), _M_in_beg(0), _M_in_cur(0), _M_in_end(0),
- _M_out_beg(0), _M_out_cur(0), _M_out_end(0),
- _M_mode(ios_base::openmode(0)), _M_buf_locale(locale()),
- _M_pback_cur_save(0), _M_pback_end_save(0),
- _M_pback_init(false)
+ : _M_in_beg(0), _M_in_cur(0), _M_in_end(0),
+ _M_out_beg(0), _M_out_cur(0), _M_out_end(0),
+ _M_buf_locale(locale())
{ }
// [27.5.2.3.1] get area access
@@ -627,8 +481,6 @@ namespace std
_M_in_beg = __gbeg;
_M_in_cur = __gnext;
_M_in_end = __gend;
- if (!(_M_mode & ios_base::in) && __gbeg && __gnext && __gend)
- _M_mode = _M_mode | ios_base::in;
}
// [27.5.2.3.2] put area access
@@ -673,9 +525,7 @@ namespace std
setp(char_type* __pbeg, char_type* __pend)
{
_M_out_beg = _M_out_cur = __pbeg;
- _M_out_end = __pend;
- if (!(_M_mode & ios_base::out) && __pbeg && __pend)
- _M_mode = _M_mode | ios_base::out;
+ _M_out_end = __pend;
}
// [27.5.2.4] virtual functions
@@ -688,15 +538,13 @@ namespace std
* are changed by this call. The standard adds, "Between invocations
* of this function a class derived from streambuf can safely cache
* results of calls to locale functions and to members of facets
- * so obtained." This function simply stores the new locale for use
- * by derived classes.
+ * so obtained."
+ *
+ * @note Base class version does nothing.
*/
virtual void
- imbue(const locale& __loc)
- {
- if (_M_buf_locale != __loc)
- _M_buf_locale = __loc;
- }
+ imbue(const locale&)
+ { }
// [27.5.2.4.2] buffer management and positioning
/**
@@ -822,14 +670,12 @@ namespace std
uflow()
{
int_type __ret = traits_type::eof();
- bool __testeof = traits_type::eq_int_type(this->underflow(), __ret);
- bool __testpending = _M_in_cur && _M_in_cur < _M_in_end;
- if (!__testeof && __testpending)
+ const bool __testeof = traits_type::eq_int_type(this->underflow(),
+ __ret);
+ if (!__testeof)
{
- __ret = traits_type::to_int_type(*_M_in_cur);
- ++_M_in_cur;
- if (_M_buf_unified && _M_mode & ios_base::out)
- ++_M_out_cur;
+ __ret = traits_type::to_int_type(*this->gptr());
+ this->gbump(1);
}
return __ret;
}
@@ -891,7 +737,7 @@ namespace std
overflow(int_type /* __c */ = traits_type::eof())
{ return traits_type::eof(); }
-#ifdef _GLIBCPP_DEPRECATED
+#ifdef _GLIBCXX_DEPRECATED
// Annex D.6
public:
/**
@@ -903,35 +749,36 @@ namespace std
* See http://gcc.gnu.org/ml/libstdc++/2002-05/msg00168.html
*
* @note This function has been deprecated by the standard. You
- * must define @c _GLIBCPP_DEPRECATED to make this visible; see
+ * must define @c _GLIBCXX_DEPRECATED to make this visible; see
* c++config.h.
*/
void
stossc()
{
- if (_M_in_cur < _M_in_end)
- ++_M_in_cur;
+ if (this->gptr() < this->egptr())
+ this->gbump(1);
else
this->uflow();
}
#endif
-#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
- // Side effect of DR 50.
private:
- basic_streambuf(const __streambuf_type&) { };
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // Side effect of DR 50.
+ basic_streambuf(const __streambuf_type& __sb)
+ : _M_in_beg(__sb._M_in_beg), _M_in_cur(__sb._M_in_cur),
+ _M_in_end(__sb._M_in_end), _M_out_beg(__sb._M_out_beg),
+ _M_out_cur(__sb._M_out_cur), _M_out_end(__sb._M_out_cur),
+ _M_buf_locale(__sb._M_buf_locale)
+ { }
__streambuf_type&
operator=(const __streambuf_type&) { return *this; };
-#endif
};
} // namespace std
-#ifdef _GLIBCPP_NO_TEMPLATE_EXPORT
-# define export
-#endif
-#ifdef _GLIBCPP_FULLY_COMPLIANT_HEADERS
-#include <bits/streambuf.tcc>
+#ifndef _GLIBCXX_EXPORT_TEMPLATE
+# include <bits/streambuf.tcc>
#endif
-#endif
+#endif /* _GLIBCXX_STREAMBUF */
OpenPOWER on IntegriCloud