0,0 → 1,830 |
// Stream buffer classes -*- C++ -*- |
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// Copyright (C) 1997-2013 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 include/streambuf |
* This is a Standard C++ Library header. |
*/ |
|
// |
// ISO C++ 14882: 27.5 Stream buffers |
// |
|
#ifndef _GLIBXX_STREAMBUF |
#define _GLIBXX_STREAMBUF 1 |
|
#pragma GCC system_header |
|
#include <bits/c++config.h> |
#include <iosfwd> |
#include <bits/localefwd.h> |
#include <bits/ios_base.h> |
#include <bits/cpp_type_traits.h> |
#include <ext/type_traits.h> |
|
namespace std _GLIBCXX_VISIBILITY(default) |
{ |
_GLIBCXX_BEGIN_NAMESPACE_VERSION |
|
template<typename _CharT, typename _Traits> |
streamsize |
__copy_streambufs_eof(basic_streambuf<_CharT, _Traits>*, |
basic_streambuf<_CharT, _Traits>*, bool&); |
|
/** |
* @brief The actual work of input and output (interface). |
* @ingroup io |
* |
* @tparam _CharT Type of character stream. |
* @tparam _Traits Traits for character type, defaults to |
* char_traits<_CharT>. |
* |
* This is a base class. Derived stream buffers each control a |
* pair of character sequences: one for input, and one for output. |
* |
* Section [27.5.1] of the standard describes the requirements and |
* behavior of stream buffer classes. That section (three paragraphs) |
* is reproduced here, for simplicity and accuracy. |
* |
* -# Stream buffers can impose various constraints on the sequences |
* they control. Some constraints are: |
* - The controlled input sequence can be not readable. |
* - The controlled output sequence can be not writable. |
* - The controlled sequences can be associated with the contents of |
* other representations for character sequences, such as external |
* files. |
* - The controlled sequences can support operations @e directly to or |
* from associated sequences. |
* - The controlled sequences can impose limitations on how the |
* program can read characters from a sequence, write characters to |
* a sequence, put characters back into an input sequence, or alter |
* the stream position. |
* . |
* -# Each sequence is characterized by three pointers which, if non-null, |
* all point into the same @c charT array object. The array object |
* represents, at any moment, a (sub)sequence of characters from the |
* sequence. Operations performed on a sequence alter the values |
* stored in these pointers, perform reads and writes directly to or |
* from associated sequences, and alter <em>the stream position</em> and |
* conversion state as needed to maintain this subsequence relationship. |
* The three pointers are: |
* - the <em>beginning pointer</em>, or lowest element address in the |
* array (called @e xbeg here); |
* - the <em>next pointer</em>, or next element address that is a |
* current candidate for reading or writing (called @e xnext here); |
* - the <em>end pointer</em>, or first element address beyond the |
* end of the array (called @e xend here). |
* . |
* -# The following semantic constraints shall always apply for any set |
* of three pointers for a sequence, using the pointer names given |
* immediately above: |
* - If @e xnext is not a null pointer, then @e xbeg and @e xend shall |
* also be non-null pointers into the same @c charT array, as |
* described above; otherwise, @e xbeg and @e xend shall also be null. |
* - If @e xnext is not a null pointer and @e xnext < @e xend for an |
* output sequence, then a <em>write position</em> is available. |
* In this case, @e *xnext shall be assignable as the next element |
* to write (to put, or to store a character value, into the sequence). |
* - If @e xnext is not a null pointer and @e xbeg < @e xnext for an |
* input sequence, then a <em>putback position</em> is available. |
* In this case, @e xnext[-1] shall have a defined value and is the |
* next (preceding) element to store a character that is put back |
* into the input sequence. |
* - If @e xnext is not a null pointer and @e xnext< @e xend for an |
* input sequence, then a <em>read position</em> is available. |
* In this case, @e *xnext shall have a defined value and is the |
* next element to read (to get, or to obtain a character value, |
* from the sequence). |
*/ |
template<typename _CharT, typename _Traits> |
class basic_streambuf |
{ |
public: |
//@{ |
/** |
* These are standard types. They permit a standardized way of |
* referring to names of (or names dependent on) the template |
* parameters, which are specific to the implementation. |
*/ |
typedef _CharT char_type; |
typedef _Traits traits_type; |
typedef typename traits_type::int_type int_type; |
typedef typename traits_type::pos_type pos_type; |
typedef typename traits_type::off_type off_type; |
//@} |
|
//@{ |
/// This is a non-standard type. |
typedef basic_streambuf<char_type, traits_type> __streambuf_type; |
//@} |
|
friend class basic_ios<char_type, traits_type>; |
friend class basic_istream<char_type, traits_type>; |
friend class basic_ostream<char_type, traits_type>; |
friend class istreambuf_iterator<char_type, traits_type>; |
friend class ostreambuf_iterator<char_type, traits_type>; |
|
friend streamsize |
__copy_streambufs_eof<>(basic_streambuf*, basic_streambuf*, bool&); |
|
template<bool _IsMove, typename _CharT2> |
friend typename __gnu_cxx::__enable_if<__is_char<_CharT2>::__value, |
_CharT2*>::__type |
__copy_move_a2(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&); |
|
template<typename _CharT2, typename _Traits2> |
friend basic_istream<_CharT2, _Traits2>& |
operator>>(basic_istream<_CharT2, _Traits2>&, _CharT2*); |
|
template<typename _CharT2, typename _Traits2, typename _Alloc> |
friend basic_istream<_CharT2, _Traits2>& |
operator>>(basic_istream<_CharT2, _Traits2>&, |
basic_string<_CharT2, _Traits2, _Alloc>&); |
|
template<typename _CharT2, typename _Traits2, typename _Alloc> |
friend basic_istream<_CharT2, _Traits2>& |
getline(basic_istream<_CharT2, _Traits2>&, |
basic_string<_CharT2, _Traits2, _Alloc>&, _CharT2); |
|
protected: |
/* |
* This is based on _IO_FILE, just reordered to be more consistent, |
* and is intended to be the most minimal abstraction for an |
* internal buffer. |
* - get == input == read |
* - put == output == write |
*/ |
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. |
|
/// Current locale setting. |
locale _M_buf_locale; |
|
public: |
/// Destructor deallocates no buffer space. |
virtual |
~basic_streambuf() |
{ } |
|
// [27.5.2.2.1] locales |
/** |
* @brief Entry point for imbue(). |
* @param __loc The new locale. |
* @return The previous locale. |
* |
* Calls the derived imbue(__loc). |
*/ |
locale |
pubimbue(const locale& __loc) |
{ |
locale __tmp(this->getloc()); |
this->imbue(__loc); |
_M_buf_locale = __loc; |
return __tmp; |
} |
|
/** |
* @brief Locale access. |
* @return The current locale in effect. |
* |
* If pubimbue(loc) has been called, then the most recent @c loc |
* is returned. Otherwise the global locale in effect at the time |
* of construction is returned. |
*/ |
locale |
getloc() const |
{ return _M_buf_locale; } |
|
// [27.5.2.2.2] buffer management and positioning |
//@{ |
/** |
* @brief Entry points for derived buffer functions. |
* |
* The public versions of @c pubfoo dispatch to the protected |
* derived @c foo member functions, passing the arguments (if any) |
* and returning the result unchanged. |
*/ |
basic_streambuf* |
pubsetbuf(char_type* __s, streamsize __n) |
{ return this->setbuf(__s, __n); } |
|
/** |
* @brief Alters the stream position. |
* @param __off Offset. |
* @param __way Value for ios_base::seekdir. |
* @param __mode Value for ios_base::openmode. |
* |
* Calls virtual seekoff function. |
*/ |
pos_type |
pubseekoff(off_type __off, ios_base::seekdir __way, |
ios_base::openmode __mode = ios_base::in | ios_base::out) |
{ return this->seekoff(__off, __way, __mode); } |
|
/** |
* @brief Alters the stream position. |
* @param __sp Position |
* @param __mode Value for ios_base::openmode. |
* |
* Calls virtual seekpos function. |
*/ |
pos_type |
pubseekpos(pos_type __sp, |
ios_base::openmode __mode = ios_base::in | ios_base::out) |
{ return this->seekpos(__sp, __mode); } |
|
/** |
* @brief Calls virtual sync function. |
*/ |
int |
pubsync() { return this->sync(); } |
//@} |
|
// [27.5.2.2.3] get area |
/** |
* @brief Looking ahead into the stream. |
* @return The number of characters available. |
* |
* If a read position is available, returns the number of characters |
* available for reading before the buffer must be refilled. |
* Otherwise returns the derived @c showmanyc(). |
*/ |
streamsize |
in_avail() |
{ |
const streamsize __ret = this->egptr() - this->gptr(); |
return __ret ? __ret : this->showmanyc(); |
} |
|
/** |
* @brief Getting the next character. |
* @return The next character, or eof. |
* |
* Calls @c sbumpc(), and if that function returns |
* @c traits::eof(), so does this function. Otherwise, @c sgetc(). |
*/ |
int_type |
snextc() |
{ |
int_type __ret = traits_type::eof(); |
if (__builtin_expect(!traits_type::eq_int_type(this->sbumpc(), |
__ret), true)) |
__ret = this->sgetc(); |
return __ret; |
} |
|
/** |
* @brief Getting the next character. |
* @return The next character, or eof. |
* |
* If the input read position is available, returns that character |
* and increments the read pointer, otherwise calls and returns |
* @c uflow(). |
*/ |
int_type |
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. |
* @return The next character, or eof. |
* |
* If the input read position is available, returns that character, |
* otherwise calls and returns @c underflow(). Does not move the |
* read position after fetching the character. |
*/ |
int_type |
sgetc() |
{ |
int_type __ret; |
if (__builtin_expect(this->gptr() < this->egptr(), true)) |
__ret = traits_type::to_int_type(*this->gptr()); |
else |
__ret = this->underflow(); |
return __ret; |
} |
|
/** |
* @brief Entry point for xsgetn. |
* @param __s A buffer area. |
* @param __n A count. |
* |
* Returns xsgetn(__s,__n). The effect is to fill @a __s[0] through |
* @a __s[__n-1] with characters from the input sequence, if possible. |
*/ |
streamsize |
sgetn(char_type* __s, streamsize __n) |
{ return this->xsgetn(__s, __n); } |
|
// [27.5.2.2.4] putback |
/** |
* @brief Pushing characters back into the input stream. |
* @param __c The character to push back. |
* @return The previous character, if possible. |
* |
* Similar to sungetc(), but @a __c is pushed onto the stream |
* instead of <em>the previous character.</em> If successful, |
* the next character fetched from the input stream will be @a |
* __c. |
*/ |
int_type |
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. |
* @return The previous character, if possible. |
* |
* If a putback position is available, this function decrements |
* the input pointer and returns that character. Otherwise, |
* calls and returns pbackfail(). The effect is to @a unget |
* the last character @a gotten. |
*/ |
int_type |
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 |
/** |
* @brief Entry point for all single-character output functions. |
* @param __c A character to output. |
* @return @a __c, if possible. |
* |
* One of two public output functions. |
* |
* If a write position is available for the output sequence (i.e., |
* the buffer is not full), stores @a __c in that position, increments |
* the position, and returns @c traits::to_int_type(__c). If a write |
* position is not available, returns @c overflow(__c). |
*/ |
int_type |
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. |
* @param __s A buffer read area. |
* @param __n A count. |
* |
* One of two public output functions. |
* |
* |
* Returns xsputn(__s,__n). The effect is to write @a __s[0] through |
* @a __s[__n-1] to the output sequence, if possible. |
*/ |
streamsize |
sputn(const char_type* __s, streamsize __n) |
{ return this->xsputn(__s, __n); } |
|
protected: |
/** |
* @brief Base constructor. |
* |
* Only called from derived constructors, and sets up all the |
* buffer data to zero, including the pointers described in the |
* basic_streambuf class description. Note that, as a result, |
* - the class starts with no read nor write positions available, |
* - this is not an error |
*/ |
basic_streambuf() |
: _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 |
//@{ |
/** |
* @brief Access to the get area. |
* |
* These functions are only available to other protected functions, |
* including derived classes. |
* |
* - eback() returns the beginning pointer for the input sequence |
* - gptr() returns the next pointer for the input sequence |
* - egptr() returns the end pointer for the input sequence |
*/ |
char_type* |
eback() const { return _M_in_beg; } |
|
char_type* |
gptr() const { return _M_in_cur; } |
|
char_type* |
egptr() const { return _M_in_end; } |
//@} |
|
/** |
* @brief Moving the read position. |
* @param __n The delta by which to move. |
* |
* This just advances the read position without returning any data. |
*/ |
void |
gbump(int __n) { _M_in_cur += __n; } |
|
/** |
* @brief Setting the three read area pointers. |
* @param __gbeg A pointer. |
* @param __gnext A pointer. |
* @param __gend A pointer. |
* @post @a __gbeg == @c eback(), @a __gnext == @c gptr(), and |
* @a __gend == @c egptr() |
*/ |
void |
setg(char_type* __gbeg, char_type* __gnext, char_type* __gend) |
{ |
_M_in_beg = __gbeg; |
_M_in_cur = __gnext; |
_M_in_end = __gend; |
} |
|
// [27.5.2.3.2] put area access |
//@{ |
/** |
* @brief Access to the put area. |
* |
* These functions are only available to other protected functions, |
* including derived classes. |
* |
* - pbase() returns the beginning pointer for the output sequence |
* - pptr() returns the next pointer for the output sequence |
* - epptr() returns the end pointer for the output sequence |
*/ |
char_type* |
pbase() const { return _M_out_beg; } |
|
char_type* |
pptr() const { return _M_out_cur; } |
|
char_type* |
epptr() const { return _M_out_end; } |
//@} |
|
/** |
* @brief Moving the write position. |
* @param __n The delta by which to move. |
* |
* This just advances the write position without returning any data. |
*/ |
void |
pbump(int __n) { _M_out_cur += __n; } |
|
/** |
* @brief Setting the three write area pointers. |
* @param __pbeg A pointer. |
* @param __pend A pointer. |
* @post @a __pbeg == @c pbase(), @a __pbeg == @c pptr(), and |
* @a __pend == @c epptr() |
*/ |
void |
setp(char_type* __pbeg, char_type* __pend) |
{ |
_M_out_beg = _M_out_cur = __pbeg; |
_M_out_end = __pend; |
} |
|
// [27.5.2.4] virtual functions |
// [27.5.2.4.1] locales |
/** |
* @brief Changes translations. |
* @param __loc A new locale. |
* |
* Translations done during I/O which depend on the current |
* locale are changed by this call. The standard adds, |
* <em>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.</em> |
* |
* @note Base class version does nothing. |
*/ |
virtual void |
imbue(const locale& __loc) |
{ } |
|
// [27.5.2.4.2] buffer management and positioning |
/** |
* @brief Manipulates the buffer. |
* |
* Each derived class provides its own appropriate behavior. See |
* the next-to-last paragraph of |
* http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch25s02.html |
* for more on this function. |
* |
* @note Base class version does nothing, returns @c this. |
*/ |
virtual basic_streambuf<char_type,_Traits>* |
setbuf(char_type*, streamsize) |
{ return this; } |
|
/** |
* @brief Alters the stream positions. |
* |
* Each derived class provides its own appropriate behavior. |
* @note Base class version does nothing, returns a @c pos_type |
* that represents an invalid stream position. |
*/ |
virtual pos_type |
seekoff(off_type, ios_base::seekdir, |
ios_base::openmode /*__mode*/ = ios_base::in | ios_base::out) |
{ return pos_type(off_type(-1)); } |
|
/** |
* @brief Alters the stream positions. |
* |
* Each derived class provides its own appropriate behavior. |
* @note Base class version does nothing, returns a @c pos_type |
* that represents an invalid stream position. |
*/ |
virtual pos_type |
seekpos(pos_type, |
ios_base::openmode /*__mode*/ = ios_base::in | ios_base::out) |
{ return pos_type(off_type(-1)); } |
|
/** |
* @brief Synchronizes the buffer arrays with the controlled sequences. |
* @return -1 on failure. |
* |
* Each derived class provides its own appropriate behavior, |
* including the definition of @a failure. |
* @note Base class version does nothing, returns zero. |
*/ |
virtual int |
sync() { return 0; } |
|
// [27.5.2.4.3] get area |
/** |
* @brief Investigating the data available. |
* @return An estimate of the number of characters available in the |
* input sequence, or -1. |
* |
* <em>If it returns a positive value, then successive calls to |
* @c underflow() will not return @c traits::eof() until at |
* least that number of characters have been supplied. If @c |
* showmanyc() returns -1, then calls to @c underflow() or @c |
* uflow() will fail.</em> [27.5.2.4.3]/1 |
* |
* @note Base class version does nothing, returns zero. |
* @note The standard adds that <em>the intention is not only that the |
* calls [to underflow or uflow] will not return @c eof() but |
* that they will return immediately.</em> |
* @note The standard adds that <em>the morphemes of @c showmanyc are |
* @b es-how-many-see, not @b show-manic.</em> |
*/ |
virtual streamsize |
showmanyc() { return 0; } |
|
/** |
* @brief Multiple character extraction. |
* @param __s A buffer area. |
* @param __n Maximum number of characters to assign. |
* @return The number of characters assigned. |
* |
* Fills @a __s[0] through @a __s[__n-1] with characters from the input |
* sequence, as if by @c sbumpc(). Stops when either @a __n characters |
* have been copied, or when @c traits::eof() would be copied. |
* |
* It is expected that derived classes provide a more efficient |
* implementation by overriding this definition. |
*/ |
virtual streamsize |
xsgetn(char_type* __s, streamsize __n); |
|
/** |
* @brief Fetches more data from the controlled sequence. |
* @return The first character from the <em>pending sequence</em>. |
* |
* Informally, this function is called when the input buffer is |
* exhausted (or does not exist, as buffering need not actually be |
* done). If a buffer exists, it is @a refilled. In either case, the |
* next available character is returned, or @c traits::eof() to |
* indicate a null pending sequence. |
* |
* For a formal definition of the pending sequence, see a good text |
* such as Langer & Kreft, or [27.5.2.4.3]/7-14. |
* |
* A functioning input streambuf can be created by overriding only |
* this function (no buffer area will be used). For an example, see |
* http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch25.html |
* |
* @note Base class version does nothing, returns eof(). |
*/ |
virtual int_type |
underflow() |
{ return traits_type::eof(); } |
|
/** |
* @brief Fetches more data from the controlled sequence. |
* @return The first character from the <em>pending sequence</em>. |
* |
* Informally, this function does the same thing as @c underflow(), |
* and in fact is required to call that function. It also returns |
* the new character, like @c underflow() does. However, this |
* function also moves the read position forward by one. |
*/ |
virtual int_type |
uflow() |
{ |
int_type __ret = traits_type::eof(); |
const bool __testeof = traits_type::eq_int_type(this->underflow(), |
__ret); |
if (!__testeof) |
{ |
__ret = traits_type::to_int_type(*this->gptr()); |
this->gbump(1); |
} |
return __ret; |
} |
|
// [27.5.2.4.4] putback |
/** |
* @brief Tries to back up the input sequence. |
* @param __c The character to be inserted back into the sequence. |
* @return eof() on failure, <em>some other value</em> on success |
* @post The constraints of @c gptr(), @c eback(), and @c pptr() |
* are the same as for @c underflow(). |
* |
* @note Base class version does nothing, returns eof(). |
*/ |
virtual int_type |
pbackfail(int_type __c = traits_type::eof()) |
{ return traits_type::eof(); } |
|
// Put area: |
/** |
* @brief Multiple character insertion. |
* @param __s A buffer area. |
* @param __n Maximum number of characters to write. |
* @return The number of characters written. |
* |
* Writes @a __s[0] through @a __s[__n-1] to the output sequence, as if |
* by @c sputc(). Stops when either @a n characters have been |
* copied, or when @c sputc() would return @c traits::eof(). |
* |
* It is expected that derived classes provide a more efficient |
* implementation by overriding this definition. |
*/ |
virtual streamsize |
xsputn(const char_type* __s, streamsize __n); |
|
/** |
* @brief Consumes data from the buffer; writes to the |
* controlled sequence. |
* @param __c An additional character to consume. |
* @return eof() to indicate failure, something else (usually |
* @a __c, or not_eof()) |
* |
* Informally, this function is called when the output buffer |
* is full (or does not exist, as buffering need not actually |
* be done). If a buffer exists, it is @a consumed, with |
* <em>some effect</em> on the controlled sequence. |
* (Typically, the buffer is written out to the sequence |
* verbatim.) In either case, the character @a c is also |
* written out, if @a __c is not @c eof(). |
* |
* For a formal definition of this function, see a good text |
* such as Langer & Kreft, or [27.5.2.4.5]/3-7. |
* |
* A functioning output streambuf can be created by overriding only |
* this function (no buffer area will be used). |
* |
* @note Base class version does nothing, returns eof(). |
*/ |
virtual int_type |
overflow(int_type __c = traits_type::eof()) |
{ return traits_type::eof(); } |
|
#if _GLIBCXX_USE_DEPRECATED |
// Annex D.6 |
public: |
/** |
* @brief Tosses a character. |
* |
* Advances the read pointer, ignoring the character that would have |
* been read. |
* |
* See http://gcc.gnu.org/ml/libstdc++/2002-05/msg00168.html |
*/ |
void |
stossc() |
{ |
if (this->gptr() < this->egptr()) |
this->gbump(1); |
else |
this->uflow(); |
} |
#endif |
|
// Also used by specializations for char and wchar_t in src. |
void |
__safe_gbump(streamsize __n) { _M_in_cur += __n; } |
|
void |
__safe_pbump(streamsize __n) { _M_out_cur += __n; } |
|
private: |
// _GLIBCXX_RESOLVE_LIB_DEFECTS |
// Side effect of DR 50. |
basic_streambuf(const basic_streambuf& __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) |
{ } |
|
basic_streambuf& |
operator=(const basic_streambuf&) { return *this; }; |
}; |
|
// Explicit specialization declarations, defined in src/streambuf.cc. |
template<> |
streamsize |
__copy_streambufs_eof(basic_streambuf<char>* __sbin, |
basic_streambuf<char>* __sbout, bool& __ineof); |
#ifdef _GLIBCXX_USE_WCHAR_T |
template<> |
streamsize |
__copy_streambufs_eof(basic_streambuf<wchar_t>* __sbin, |
basic_streambuf<wchar_t>* __sbout, bool& __ineof); |
#endif |
|
_GLIBCXX_END_NAMESPACE_VERSION |
} // namespace |
|
#include <bits/streambuf.tcc> |
|
#endif /* _GLIBCXX_STREAMBUF */ |