std::ostrstream Class Reference

Inheritance diagram for std::ostrstream:

Inheritance graph
[legend]
Collaboration diagram for std::ostrstream:

Collaboration graph
[legend]
List of all members.

Public Types

typedef char char_type
typedef Traits::int_type int_type
typedef Traits::pos_type pos_type
typedef Traits::off_type off_type
typedef Traits traits_type
typedef basic_streambuf< char,
Traits > 
streambuf_type
typedef basic_ios< char, Traits > __ios_type
typedef basic_ostream< char,
Traits > 
__ostream_type
typedef num_put< char, ostreambuf_iterator<
char, Traits > > 
num_put_type
typedef ctype< char > ctype_type
typedef num_get< char, istreambuf_iterator<
char, Traits > > 
num_get_type
enum  event
 The set of events that may be passed to an event callback. More...
typedef IosFmtflags fmtflags
 This is a bitmask type.
typedef IosIostate iostate
 This is a bitmask type.
typedef IosOpenmode openmode
 This is a bitmask type.
typedef IosSeekdir seekdir
 This is an enumerated type.
typedef void(*) event_callback (event, ios_base &, int)
 The type of an event callback function.

Public Member Functions

 ostrstream ()
 ostrstream (char *, int, ios_base::openmode=ios_base::out)
virtual ~ostrstream ()
strstreambufrdbuf () const
 Accessing the underlying buffer.
void freeze (bool=true)
char * str ()
int pcount () const
__ostream_typeoperator<< (__ostream_type &(*__pf)(__ostream_type &))
 Interface for manipulators.
__ostream_typeoperator<< (long n)
 Basic arithmetic inserters.
__ostream_typeoperator<< (short n)
__ostream_typeoperator<< (unsigned short n)
__ostream_typeoperator<< (int n)
__ostream_typeoperator<< (unsigned int n)
__ostream_typeoperator<< (float __f)
__ostream_typeoperator<< (streambuf_type *sb)
 Extracting from another streambuf.
__ostream_typeput (char_type c)
 Simple insertion.
void M_write (const char_type *s, streamsize n)
__ostream_typewrite (const char_type *s, streamsize n)
 Character string insertion.
__ostream_typeflush ()
 Synchronizing the stream buffer.
pos_type tellp ()
 Getting the current write position.
__ostream_typeseekp (pos_type)
 Changing the current write position.
__ostream_typeseekp (off_type, ios_base::seekdir)
 Changing the current write position.
 operator void * () const
 The quick-and-easy status check.
bool operator! () const
iostate rdstate () const
 Returns the error state of the stream buffer.
void clear (iostate state=goodbit)
 [Re]sets the error state.
void setstate (iostate state)
 Sets additional flags in the error state.
void M_setstate (iostate state)
bool good () const
 Fast error checking.
bool eof () const
 Fast error checking.
bool fail () const
 Fast error checking.
bool bad () const
 Fast error checking.
iostate exceptions () const
 Throwing exceptions on errors.
void exceptions (iostate __except)
 Throwing exceptions on errors.
basic_ostream< char, Traits > * tie () const
 Fetches the current tied stream.
basic_ostream< char, Traits > * tie (basic_ostream< char, Traits > *__tiestr)
 Ties this stream to an output stream.
basic_streambuf< char, Traits > * rdbuf (basic_streambuf< char, Traits > *sb)
 Changing the underlying buffer.
basic_ioscopyfmt (const basic_ios &__rhs)
 Copies fields of __rhs into this.
char_type fill () const
 Retreives the "empty" character.
char_type fill (char_type ch)
 Sets a new "empty" character.
locale imbue (const locale &__loc)
 Moves to a new locale.
char narrow (char_type c, char __dfault) const
 Squeezes characters.
char_type widen (char c) const
 Widens characters.
void register_callback (event_callback __fn, int index)
 Add the callback __fn with parameter index.
fmtflags flags () const
 Access to format flags.
fmtflags flags (fmtflags __fmtfl)
 Setting new format flags all at once.
fmtflags setf (fmtflags __fmtfl)
 Setting new format flags.
fmtflags setf (fmtflags __fmtfl, fmtflags __mask)
 Setting new format flags.
void unsetf (fmtflags __mask)
 Clearing format flags.
streamsize precision () const
 Flags access.
streamsize precision (streamsize __prec)
 Changing flags.
streamsize width () const
 Flags access.
streamsize width (streamsize __wide)
 Changing flags.
locale getloc () const
 Locale access.
const localeM_getloc () const
 Locale access.
long & iword (int __ix)
 Access to integer array.
void *& pword (int __ix)
 Access to void pointer array.

Static Public Member Functions

static bool sync_with_stdio (bool sync=true)
 Interaction with the standard C I/O objects.
static int xalloc () throw ()
 Access to unique indices.

Static Public Attributes

static const fmtflags boolalpha
 Insert/extract bool in alphabetic rather than numeric format.
static const fmtflags dec
 Converts integer input or generates integer output in decimal base.
static const fmtflags fixed
 Generate floating-point output in fixed-point notation.
static const fmtflags hex
 Converts integer input or generates integer output in hexadecimal base.
static const fmtflags internal
 designated.
static const fmtflags left
 generated output. (I.e., the thing you print is flush left.)
static const fmtflags oct
 Converts integer input or generates integer output in octal base.
static const fmtflags right
 generated output. (I.e., the thing you print is flush right.)
static const fmtflags scientific
 Generates floating-point output in scientific notation.
static const fmtflags showbase
 output.
static const fmtflags showpoint
 floating-point output.
static const fmtflags showpos
 Generates a + sign in non-negative generated numeric output.
static const fmtflags skipws
 Skips leading white space before certain input operations.
static const fmtflags unitbuf
 Flushes output after each output operation.
static const fmtflags uppercase
 in generated output.
static const fmtflags adjustfield
 A mask of left|right|internal. Useful for the 2-arg form of setf.
static const fmtflags basefield
 A mask of dec|oct|hex. Useful for the 2-arg form of setf.
static const fmtflags floatfield
 A mask of scientific|fixed. Useful for the 2-arg form of setf.
static const iostate badbit
 as an irrecoverable read error from a file).
static const iostate eofbit
 Indicates that an input operation reached the end of an input sequence.
static const iostate failbit
 desired characters.
static const iostate goodbit
 Indicates all is well.
static const openmode app
 Seek to end before each write.
static const openmode ate
 Open and seek to end immediately after opening.
static const openmode binary
 http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#7 for more.
static const openmode in
 Open for input. Default for ifstream and fstream.
static const openmode out
 Open for output. Default for ofstream and fstream.
static const openmode trunc
 Open for input. Default for ofstream.
static const seekdir beg
 Request a seek relative to the beginning of the stream.
static const seekdir cur
 Request a seek relative to the current position within the sequence.
static const seekdir end
 Request a seek relative to the current end of the sequence.

Protected Member Functions

void init (basic_streambuf< char, Traits > *sb)
 All setup is performed here.
void M_call_callbacks (event __ev) throw ()
void M_dispose_callbacks (void)
Words & M_grow_words (int index, bool __iword)
void M_init ()

Protected Attributes

basic_ostream< char, Traits > * M_tie
char_type M_fill
bool M_fill_init
basic_streambuf< char, Traits > * M_streambuf
const ctype_typeM_ctype
const num_put_typeM_num_put
const num_get_typeM_num_get
Callback_list * M_callbacks
Words M_word_zero
Words M_local_word [S_local_word_size]
int M_word_size
Words * M_word
locale M_ios_locale
streamsize M_precision
streamsize M_width
fmtflags M_flags
iostate M_exception
iostate M_streambuf_state

Static Protected Attributes

static const int S_local_word_size

Private Attributes

strstreambuf M_buf

Friends

class sentry

Detailed Description

Definition at line 141 of file strstream.


Member Typedef Documentation

typedef char std::basic_ostream< char , Traits >::char_type [inherited]

These are standard types. They permit a standardized way of referring to names of (or names dependant on) the template parameters, which are specific to the implementation.

Reimplemented from std::basic_ios< char, Traits >.

Definition at line 62 of file ostream.

typedef IosFmtflags std::ios_base::fmtflags [inherited]

This is a bitmask type.

"IosFmtflags" is implementation-defined, but it is valid to perform bitwise operations on these values and expect the Right Thing to happen. Defined objects of type fmtflags are:

Definition at line 253 of file ios_base.h.

typedef IosIostate std::ios_base::iostate [inherited]

This is a bitmask type.

"IosIostate" is implementation-defined, but it is valid to perform bitwise operations on these values and expect the Right Thing to happen. Defined objects of type iostate are:

Definition at line 328 of file ios_base.h.

typedef IosOpenmode std::ios_base::openmode [inherited]

This is a bitmask type.

"IosOpenmode" is implementation-defined, but it is valid to perform bitwise operations on these values and expect the Right Thing to happen. Defined objects of type openmode are:

Definition at line 359 of file ios_base.h.

typedef IosSeekdir std::ios_base::seekdir [inherited]

This is an enumerated type.

"IosSeekdir" is implementation-defined. Defined values of type seekdir are:

Definition at line 392 of file ios_base.h.

typedef void(*) std::ios_base::event_callback(event, ios_base &, int) [inherited]

The type of an event callback function.

Parameters:
event One of the members of the event enum.
ios_base Reference to the ios_base object.
int The integer provided when the callback was registered.
Event callbacks are user defined functions that get called during several ios_base and basic_ios functions, specifically imbue(), copyfmt(), and ~ios().

Definition at line 437 of file ios_base.h.


Member Enumeration Documentation

enum std::ios_base::event [inherited]

The set of events that may be passed to an event callback.

erase_event is used during ~ios() and copyfmt(). imbue_event is used during imbue(). copyfmt_event is used during copyfmt().

Definition at line 420 of file ios_base.h.


Member Function Documentation

strstreambuf * std::ostrstream::rdbuf (  )  const

Accessing the underlying buffer.

Returns:
The current stream buffer.
This does not change the state of the stream.

Reimplemented from std::basic_ios< char, Traits >.

Definition at line 375 of file strstream.cc.

__ostream_type& std::basic_ostream< char , Traits >::operator<< ( __ostream_type &(*)(__ostream_type &)  __pf  )  [inline, inherited]

Interface for manipulators.

Manuipulators such as std::endl and std::hex use these functions in constructs like "std::cout << std::endl". For more information, see the iomanip header.

__ostream_type& std::basic_ostream< char , Traits >::operator<< ( long  n  )  [inherited]

Basic arithmetic inserters.

Parameters:
A variable of builtin type.
Returns:
*this if successful
These functions use the stream's current locale (specifically, the num_get facet) to perform numeric formatting.

__ostream_type& std::basic_ostream< char , Traits >::operator<< ( streambuf_type sb  )  [inherited]

Extracting from another streambuf.

Parameters:
sb A pointer to a streambuf
This function behaves like one of the basic arithmetic extractors, in that it also constructs a sentry object and has the same error handling behavior.

If sb is NULL, the stream will set failbit in its error state.

Characters are extracted from sb and inserted into *this until one of the following occurs:

If the function inserts no characters, failbit is set.

__ostream_type& std::basic_ostream< char , Traits >::put ( char_type  c  )  [inherited]

Simple insertion.

Parameters:
c The character to insert.
Returns:
*this
Tries to insert c.

Note:
This function is not overloaded on signed char and unsigned char.

__ostream_type& std::basic_ostream< char , Traits >::write ( const char_type s,
streamsize  n 
) [inherited]

Character string insertion.

Parameters:
s The array to insert.
n Maximum number of characters to insert.
Returns:
*this
Characters are copied from s and inserted into the stream until one of the following happens:

Note:
This function is not overloaded on signed char and unsigned char.

__ostream_type& std::basic_ostream< char , Traits >::flush (  )  [inherited]

Synchronizing the stream buffer.

Returns:
*this
If rdbuf() is a null pointer, changes nothing.

Otherwise, calls rdbuf()->pubsync(), and if that returns -1, sets badbit.

pos_type std::basic_ostream< char , Traits >::tellp (  )  [inherited]

Getting the current write position.

Returns:
A file position object.
If fail() is not false, returns pos_type(-1) to indicate failure. Otherwise returns rdbuf()->pubseekoff(0,cur,out).

__ostream_type& std::basic_ostream< char , Traits >::seekp ( pos_type   )  [inherited]

Changing the current write position.

Parameters:
pos A file position object.
Returns:
*this
If fail() is not true, calls rdbuf()->pubseekpos(pos). If that function fails, sets failbit.

__ostream_type& std::basic_ostream< char , Traits >::seekp ( off_type  ,
ios_base::seekdir   
) [inherited]

Changing the current write position.

Parameters:
off A file offset object.
dir The direction in which to seek.
Returns:
*this
If fail() is not true, calls rdbuf()->pubseekoff(off,dir). If that function fails, sets failbit.

std::basic_ios< char , Traits >::operator void * (  )  const [inline, inherited]

The quick-and-easy status check.

This allows you to write constructs such as "if (!a_stream) ..." and "while (a_stream) ..."

Definition at line 107 of file basic_ios.h.

References std::basic_ios< CharT, Traits >::fail().

iostate std::basic_ios< char , Traits >::rdstate (  )  const [inline, inherited]

Returns the error state of the stream buffer.

Returns:
A bit pattern (well, isn't everything?)
See std::ios_base::iostate for the possible bit values. Most users will call one of the interpreting wrappers, e.g., good().

Definition at line 123 of file basic_ios.h.

void std::basic_ios< char , Traits >::clear ( iostate  state = goodbit  )  [inherited]

[Re]sets the error state.

Parameters:
state The new state flag(s) to set.
See std::ios_base::iostate for the possible bit values. Most users will not need to pass an argument.

void std::basic_ios< char , Traits >::setstate ( iostate  state  )  [inline, inherited]

Sets additional flags in the error state.

Parameters:
state The additional state flag(s) to set.
See std::ios_base::iostate for the possible bit values.

Definition at line 143 of file basic_ios.h.

References std::basic_ios< CharT, Traits >::clear().

bool std::basic_ios< char , Traits >::good (  )  const [inline, inherited]

Fast error checking.

Returns:
True if no error flags are set.
A wrapper around rdstate.

Definition at line 166 of file basic_ios.h.

References std::basic_ios< CharT, Traits >::rdstate().

bool std::basic_ios< char , Traits >::eof (  )  const [inline, inherited]

Fast error checking.

Returns:
True if the eofbit is set.
Note that other iostate flags may also be set.

Definition at line 176 of file basic_ios.h.

References std::ios_base::eofbit.

bool std::basic_ios< char , Traits >::fail (  )  const [inline, inherited]

Fast error checking.

Returns:
True if either the badbit or the failbit is set.
Checking the badbit in fail() is historical practice. Note that other iostate flags may also be set.

Definition at line 187 of file basic_ios.h.

References std::ios_base::badbit, and std::ios_base::failbit.

bool std::basic_ios< char , Traits >::bad (  )  const [inline, inherited]

Fast error checking.

Returns:
True if the badbit is set.
Note that other iostate flags may also be set.

Definition at line 197 of file basic_ios.h.

References std::ios_base::badbit.

iostate std::basic_ios< char , Traits >::exceptions (  )  const [inline, inherited]

Throwing exceptions on errors.

Returns:
The current exceptions mask.
This changes nothing in the stream. See the one-argument version of exceptions(iostate) for the meaning of the return value.

Definition at line 208 of file basic_ios.h.

void std::basic_ios< char , Traits >::exceptions ( iostate  __except  )  [inline, inherited]

Throwing exceptions on errors.

Parameters:
except The new exceptions mask.
By default, error flags are set silently. You can set an exceptions mask for each stream; if a bit in the mask becomes set in the error flags, then an exception of type std::ios_base::failure is thrown.

If the error flage is already set when the exceptions mask is added, the exception is immediately thrown. Try running the following under GCC 3.1 or later:

  #include <iostream>
  #include <fstream>
  #include <exception>

  int main()
  {
      std::set_terminate (__gnu_cxx::__verbose_terminate_handler);

      std::ifstream f ("/etc/motd");

      std::cerr << "Setting badbit\n";
      f.setstate (std::ios_base::badbit);

      std::cerr << "Setting exception mask\n";
      f.exceptions (std::ios_base::badbit);
  }

Definition at line 243 of file basic_ios.h.

References std::basic_ios< CharT, Traits >::clear().

basic_ostream<char , Traits >* std::basic_ios< char , Traits >::tie (  )  const [inline, inherited]

Fetches the current tied stream.

Returns:
A pointer to the tied stream, or NULL if the stream is not tied.
A stream may be tied (or synchronized) to a second output stream. When this stream performs any I/O, the tied stream is first flushed. For example, std::cin is tied to std::cout.

Definition at line 281 of file basic_ios.h.

basic_ostream<char , Traits >* std::basic_ios< char , Traits >::tie ( basic_ostream< char , Traits > *  __tiestr  )  [inline, inherited]

Ties this stream to an output stream.

Parameters:
tiestr The output stream.
Returns:
The previously tied output stream, or NULL if the stream was not tied.
This sets up a new tie; see tie() for more.

Definition at line 293 of file basic_ios.h.

basic_streambuf<char , Traits >* std::basic_ios< char , Traits >::rdbuf ( basic_streambuf< char , Traits > *  sb  )  [inherited]

Changing the underlying buffer.

Parameters:
sb The new stream buffer.
Returns:
The previous stream buffer.
Associates a new buffer with the current stream, and clears the error state.

Due to historical accidents which the LWG refuses to correct, the I/O library suffers from a design error: this function is hidden in derived classes by overrides of the zero-argument rdbuf(), which is non-virtual for hysterical raisins. As a result, you must use explicit qualifications to access this function via any derived class. For example:

  std::fstream     foo;         // or some other derived type
  std::streambuf*  p = .....;

  foo.ios::rdbuf(p);            // ios == basic_ios<char>

basic_ios& std::basic_ios< char , Traits >::copyfmt ( const basic_ios< char, Traits > &  __rhs  )  [inherited]

Copies fields of __rhs into this.

Parameters:
__rhs The source values for the copies.
Returns:
Reference to this object.
All fields of __rhs are copied into this object except that rdbuf() and rdstate() remain unchanged. All values in the pword and iword arrays are copied. Before copying, each callback is invoked with erase_event. After copying, each (new) callback is invoked with copyfmt_event. The final step is to copy exceptions().

char_type std::basic_ios< char , Traits >::fill (  )  const [inline, inherited]

Retreives the "empty" character.

Returns:
The current fill character.
It defaults to a space (' ') in the current locale.

Definition at line 356 of file basic_ios.h.

References std::basic_ios< CharT, Traits >::widen().

char_type std::basic_ios< char , Traits >::fill ( char_type  ch  )  [inline, inherited]

Sets a new "empty" character.

Parameters:
ch The new character.
Returns:
The previous fill character.
The fill character is used to fill out space when P+ characters have been requested (e.g., via setw), Q characters are actually used, and Q<P. It defaults to a space (' ') in the current locale.

Definition at line 376 of file basic_ios.h.

References std::basic_ios< CharT, Traits >::fill().

locale std::basic_ios< char , Traits >::imbue ( const locale __loc  )  [inherited]

Moves to a new locale.

Parameters:
loc The new locale.
Returns:
The previous locale.
Calls ios_base::imbue(loc), and if a stream buffer is associated with this stream, calls that buffer's pubimbue(loc).

Additional l10n notes are at http://gcc.gnu.org/onlinedocs/libstdc++/22_locale/howto.html

Reimplemented from std::ios_base.

char std::basic_ios< char , Traits >::narrow ( char_type  c,
char  __dfault 
) const [inherited]

Squeezes characters.

Parameters:
c The character to narrow.
dfault The character to narrow.
Returns:
The narrowed character.
Maps a character of char_type to a character of char, if possible.

Returns the result of

    std::use_facet<ctype<char_type> >(getloc()).narrow(c,dfault)

Additional l10n notes are at http://gcc.gnu.org/onlinedocs/libstdc++/22_locale/howto.html

char_type std::basic_ios< char , Traits >::widen ( char  c  )  const [inherited]

Widens characters.

Parameters:
c The character to widen.
Returns:
The widened character.
Maps a character of char to a character of char_type.

Returns the result of

    std::use_facet<ctype<char_type> >(getloc()).widen(c)

Additional l10n notes are at http://gcc.gnu.org/onlinedocs/libstdc++/22_locale/howto.html

void std::basic_ios< char , Traits >::init ( basic_streambuf< char , Traits > *  sb  )  [protected, inherited]

All setup is performed here.

This is called from the public constructor. It is not virtual and cannot be redefined.

void std::ios_base::register_callback ( event_callback  __fn,
int  index 
) [inherited]

Add the callback __fn with parameter index.

Parameters:
__fn The function to add.
index The integer to pass to the function when invoked.
Registers a function as an event callback with an integer parameter to be passed to the function when invoked. Multiple copies of the function are allowed. If there are multiple callbacks, they are invoked in the order they were registered.

Definition at line 148 of file ios.cc.

fmtflags std::ios_base::flags (  )  const [inline, inherited]

Access to format flags.

Returns:
The format control flags for both input and output.

Definition at line 550 of file ios_base.h.

Referenced by std::basic_ios< CharT, Traits >::copyfmt(), std::num_get< CharT, InIter >::do_get(), std::num_put< CharT, OutIter >::do_put(), std::money_get< CharT, InIter >::M_extract(), std::num_get< CharT, InIter >::M_extract_int(), std::num_put< CharT, OutIter >::M_group_int(), std::money_put< CharT, OutIter >::M_insert(), std::num_put< CharT, OutIter >::M_insert_float(), std::num_put< CharT, OutIter >::M_insert_int(), __gnu_cxx::operator<<(), std::basic_ostream< CharT, Traits >::operator<<(), std::basic_ostream< char >::operator<<(), std::operator<<(), std::num_base::S_format_float(), std::__pad< CharT, Traits >::S_pad(), and std::basic_istream< CharT, Traits >::sentry::sentry().

fmtflags std::ios_base::flags ( fmtflags  __fmtfl  )  [inline, inherited]

Setting new format flags all at once.

Parameters:
fmtfl The new flags to set.
Returns:
The previous format control flags.
This function overwrites all the format flags with fmtfl.

Definition at line 560 of file ios_base.h.

fmtflags std::ios_base::setf ( fmtflags  __fmtfl  )  [inline, inherited]

Setting new format flags.

Parameters:
fmtfl Additional flags to set.
Returns:
The previous format control flags.
This function sets additional flags in format control. Flags that were previously set remain set.

Definition at line 576 of file ios_base.h.

Referenced by std::boolalpha(), std::dec(), std::fixed(), std::hex(), std::internal(), std::left(), std::oct(), std::operator<<(), std::operator>>(), std::right(), std::scientific(), std::showbase(), std::showpoint(), std::showpos(), std::skipws(), std::unitbuf(), and std::uppercase().

fmtflags std::ios_base::setf ( fmtflags  __fmtfl,
fmtflags  __mask 
) [inline, inherited]

Setting new format flags.

Parameters:
fmtfl Additional flags to set.
mask The flags mask for fmtfl.
Returns:
The previous format control flags.
This function clears mask in the format flags, then sets fmtfl & mask. An example mask is ios_base::adjustfield.

Definition at line 593 of file ios_base.h.

void std::ios_base::unsetf ( fmtflags  __mask  )  [inline, inherited]

Clearing format flags.

Parameters:
mask The flags to unset.
This function clears mask in the format flags.

Definition at line 608 of file ios_base.h.

Referenced by std::noboolalpha(), std::noshowbase(), std::noshowpoint(), std::noshowpos(), std::noskipws(), std::nounitbuf(), and std::nouppercase().

streamsize std::ios_base::precision (  )  const [inline, inherited]

Flags access.

Returns:
The precision to generate on certain output operations.

Definition at line 620 of file ios_base.h.

Referenced by std::basic_ios< CharT, Traits >::copyfmt(), std::num_put< CharT, OutIter >::M_insert_float(), std::operator<<(), and std::operator>>().

streamsize std::ios_base::precision ( streamsize  __prec  )  [inline, inherited]

Changing flags.

Parameters:
prec The new precision value.
Returns:
The previous value of precision().

Definition at line 628 of file ios_base.h.

streamsize std::ios_base::width (  )  const [inline, inherited]

Flags access.

Returns:
The minimum field width to generate on output operations.
"Minimum field width" refers to the number of characters.

Definition at line 642 of file ios_base.h.

Referenced by std::basic_ios< CharT, Traits >::copyfmt(), std::num_put< CharT, OutIter >::do_put(), std::money_put< CharT, OutIter >::M_insert(), std::num_put< CharT, OutIter >::M_insert_float(), std::num_put< CharT, OutIter >::M_insert_int(), __gnu_cxx::operator<<(), std::operator<<(), and std::operator>>().

streamsize std::ios_base::width ( streamsize  __wide  )  [inline, inherited]

Changing flags.

Parameters:
wide The new width value.
Returns:
The previous value of width().

Definition at line 650 of file ios_base.h.

bool std::ios_base::sync_with_stdio ( bool  sync = true  )  [static, inherited]

Interaction with the standard C I/O objects.

Parameters:
sync Whether to synchronize or not.
Returns:
True if the standard streams were previously synchronized.
The synchronization referred to is only that between the standard C facilities (e.g., stdout) and the standard C++ objects (e.g., cout). User-declared streams are unaffected. See http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#8 for more.

Definition at line 148 of file ios_init.cc.

References __gnu_internal::buf_cerr, __gnu_internal::buf_cerr_sync, __gnu_internal::buf_cin, __gnu_internal::buf_cin_sync, __gnu_internal::buf_cout, __gnu_internal::buf_cout_sync, std::cerr, std::cin, std::clog, std::cout, std::ios_base::in, and std::ios_base::out.

locale std::ios_base::getloc (  )  const [inline, inherited]

Locale access.

Returns:
A copy of the current locale.
If imbue(loc) has previously been called, then this function returns loc. Otherwise, it returns a copy of std::locale(), the global C++ locale.

Definition at line 692 of file ios_base.h.

Referenced by std::basic_ios< CharT, Traits >::copyfmt(), std::money_put< CharT, OutIter >::do_put(), std::operator>>(), and std::ws().

const locale& std::ios_base::M_getloc (  )  const [inline, inherited]

Locale access.

Returns:
A reference to the current locale.
Like getloc above, but returns a reference instead of generating a copy.

Definition at line 702 of file ios_base.h.

int std::ios_base::xalloc (  )  throw () [static, inherited]

Access to unique indices.

Returns:
An integer different from all previous calls.
This function returns a unique integer every time it is called. It can be used for any purpose, but is primarily intended to be a unique index for the iword and pword functions. The expectation is that an application calls xalloc in order to obtain an index in the iword and pword arrays that can be used without fear of conflict.

The implementation maintains a static variable that is incremented and returned on each invocation. xalloc is guaranteed to return an index that is safe to use in the iword and pword arrays.

Definition at line 139 of file ios.cc.

long& std::ios_base::iword ( int  __ix  )  [inline, inherited]

Access to integer array.

Parameters:
__ix Index into the array.
Returns:
A reference to an integer associated with the index.
The iword function provides access to an array of integers that can be used for any purpose. The array grows as required to hold the supplied index. All integers in the array are initialized to 0.

The implementation reserves several indices. You should use xalloc to obtain an index that is safe to use. Also note that since the array can grow dynamically, it is not safe to hold onto the reference.

Definition at line 736 of file ios_base.h.

void*& std::ios_base::pword ( int  __ix  )  [inline, inherited]

Access to void pointer array.

Parameters:
__ix Index into the array.
Returns:
A reference to a void* associated with the index.
The pword function provides access to an array of pointers that can be used for any purpose. The array grows as required to hold the supplied index. All pointers in the array are initialized to 0.

The implementation reserves several indices. You should use xalloc to obtain an index that is safe to use. Also note that since the array can grow dynamically, it is not safe to hold onto the reference.

Definition at line 757 of file ios_base.h.


Member Data Documentation

const ios_base::fmtflags std::ios_base::boolalpha [static, inherited]

Insert/extract bool in alphabetic rather than numeric format.

Definition at line 256 of file ios_base.h.

Referenced by std::boolalpha(), std::num_get< CharT, InIter >::do_get(), std::num_put< CharT, OutIter >::do_put(), and std::noboolalpha().

const ios_base::fmtflags std::ios_base::dec [static, inherited]

Converts integer input or generates integer output in decimal base.

Definition at line 259 of file ios_base.h.

Referenced by std::dec(), std::ios_base::M_init(), std::operator<<(), and std::operator>>().

const ios_base::fmtflags std::ios_base::fixed [static, inherited]

Generate floating-point output in fixed-point notation.

Definition at line 262 of file ios_base.h.

Referenced by std::fixed(), std::num_put< CharT, OutIter >::M_insert_float(), and std::num_base::S_format_float().

const ios_base::fmtflags std::ios_base::hex [static, inherited]

Converts integer input or generates integer output in hexadecimal base.

Definition at line 265 of file ios_base.h.

Referenced by std::num_get< CharT, InIter >::do_get(), std::num_put< CharT, OutIter >::do_put(), std::hex(), std::int_to_char(), std::num_get< CharT, InIter >::M_extract_int(), std::num_put< CharT, OutIter >::M_group_int(), std::basic_ostream< CharT, Traits >::operator<<(), std::basic_ostream< char >::operator<<(), std::operator<<(), and std::operator>>().

const ios_base::fmtflags std::ios_base::internal [static, inherited]

designated.

Definition at line 270 of file ios_base.h.

Referenced by std::num_put< CharT, OutIter >::do_put(), std::internal(), std::money_put< CharT, OutIter >::M_insert(), and std::__pad< CharT, Traits >::S_pad().

const ios_base::fmtflags std::ios_base::left [static, inherited]

generated output. (I.e., the thing you print is flush left.)

Definition at line 274 of file ios_base.h.

Referenced by std::left(), std::money_put< CharT, OutIter >::M_insert(), __gnu_cxx::operator<<(), and std::__pad< CharT, Traits >::S_pad().

const ios_base::fmtflags std::ios_base::oct [static, inherited]

Converts integer input or generates integer output in octal base.

Definition at line 277 of file ios_base.h.

Referenced by std::int_to_char(), std::num_get< CharT, InIter >::M_extract_int(), std::num_put< CharT, OutIter >::M_group_int(), std::oct(), std::basic_ostream< CharT, Traits >::operator<<(), std::basic_ostream< char >::operator<<(), std::operator<<(), and std::operator>>().

const ios_base::fmtflags std::ios_base::right [static, inherited]

generated output. (I.e., the thing you print is flush right.)

Definition at line 281 of file ios_base.h.

Referenced by std::right().

const ios_base::fmtflags std::ios_base::scientific [static, inherited]

Generates floating-point output in scientific notation.

Definition at line 284 of file ios_base.h.

Referenced by std::num_base::S_format_float(), and std::scientific().

const ios_base::fmtflags std::ios_base::showbase [static, inherited]

output.

Definition at line 288 of file ios_base.h.

Referenced by std::num_put< CharT, OutIter >::do_put(), std::int_to_char(), std::money_get< CharT, InIter >::M_extract(), std::num_put< CharT, OutIter >::M_group_int(), std::money_put< CharT, OutIter >::M_insert(), std::noshowbase(), and std::showbase().

const ios_base::fmtflags std::ios_base::showpoint [static, inherited]

floating-point output.

Definition at line 292 of file ios_base.h.

Referenced by std::noshowpoint(), std::num_base::S_format_float(), and std::showpoint().

const ios_base::fmtflags std::ios_base::showpos [static, inherited]

Generates a + sign in non-negative generated numeric output.

Definition at line 295 of file ios_base.h.

Referenced by std::int_to_char(), std::noshowpos(), std::num_base::S_format_float(), and std::showpos().

const ios_base::fmtflags std::ios_base::skipws [static, inherited]

Skips leading white space before certain input operations.

Definition at line 298 of file ios_base.h.

Referenced by std::ios_base::M_init(), std::noskipws(), std::basic_istream< CharT, Traits >::sentry::sentry(), and std::skipws().

const ios_base::fmtflags std::ios_base::unitbuf [static, inherited]

Flushes output after each output operation.

Definition at line 301 of file ios_base.h.

Referenced by std::ios_base::Init::Init(), std::nounitbuf(), std::unitbuf(), and std::basic_ostream< CharT, Traits >::sentry::~sentry().

const ios_base::fmtflags std::ios_base::uppercase [static, inherited]

in generated output.

Definition at line 305 of file ios_base.h.

Referenced by std::num_put< CharT, OutIter >::do_put(), std::int_to_char(), std::nouppercase(), std::num_base::S_format_float(), and std::uppercase().

const ios_base::fmtflags std::ios_base::adjustfield [static, inherited]

A mask of left|right|internal. Useful for the 2-arg form of setf.

Definition at line 308 of file ios_base.h.

Referenced by std::internal(), std::left(), std::money_put< CharT, OutIter >::M_insert(), std::right(), and std::__pad< CharT, Traits >::S_pad().

const ios_base::fmtflags std::ios_base::basefield [static, inherited]

A mask of dec|oct|hex. Useful for the 2-arg form of setf.

Definition at line 311 of file ios_base.h.

Referenced by std::dec(), std::num_get< CharT, InIter >::do_get(), std::num_put< CharT, OutIter >::do_put(), std::hex(), std::int_to_char(), std::num_get< CharT, InIter >::M_extract_int(), std::num_put< CharT, OutIter >::M_group_int(), std::oct(), std::basic_ostream< CharT, Traits >::operator<<(), std::basic_ostream< char >::operator<<(), std::operator<<(), and std::operator>>().

const ios_base::fmtflags std::ios_base::floatfield [static, inherited]

A mask of scientific|fixed. Useful for the 2-arg form of setf.

Definition at line 314 of file ios_base.h.

Referenced by std::fixed(), std::num_base::S_format_float(), and std::scientific().

const ios_base::iostate std::ios_base::badbit [static, inherited]

as an irrecoverable read error from a file).

Definition at line 332 of file ios_base.h.

Referenced by std::basic_ios< char, Traits >::bad(), std::basic_ios< CharT, Traits >::clear(), std::basic_ios< char, Traits >::fail(), std::basic_ostream< CharT, Traits >::flush(), std::basic_istream< CharT, Traits >::get(), std::getline(), std::basic_istream< CharT, Traits >::getline(), std::basic_istream< CharT, Traits >::ignore(), std::basic_ios< CharT, Traits >::init(), std::ios_base::M_grow_words(), std::basic_ostream< char >::M_write(), std::operator<<(), std::basic_ostream< CharT, Traits >::operator<<(), std::basic_istream< CharT, Traits >::operator>>(), std::operator>>(), std::basic_istream< CharT, Traits >::peek(), std::basic_ostream< CharT, Traits >::put(), std::basic_istream< CharT, Traits >::putback(), std::basic_istream< CharT, Traits >::read(), std::basic_istream< CharT, Traits >::readsome(), std::basic_istream< CharT, Traits >::seekg(), std::basic_ostream< CharT, Traits >::seekp(), std::basic_istream< CharT, Traits >::sync(), std::basic_istream< CharT, Traits >::tellg(), std::basic_ostream< CharT, Traits >::tellp(), std::basic_istream< CharT, Traits >::unget(), std::basic_ostream< CharT, Traits >::write(), and std::basic_ostream< CharT, Traits >::sentry::~sentry().

const ios_base::iostate std::ios_base::eofbit [static, inherited]

Indicates that an input operation reached the end of an input sequence.

Definition at line 335 of file ios_base.h.

Referenced by std::num_get< CharT, InIter >::do_get(), std::time_get< CharT, InIter >::do_get_date(), std::time_get< CharT, InIter >::do_get_monthname(), std::time_get< CharT, InIter >::do_get_time(), std::time_get< CharT, InIter >::do_get_weekday(), std::time_get< CharT, InIter >::do_get_year(), std::basic_ios< char, Traits >::eof(), std::basic_istream< CharT, Traits >::get(), std::getline(), std::basic_istream< CharT, Traits >::getline(), std::basic_istream< CharT, Traits >::ignore(), std::money_get< CharT, InIter >::M_extract(), std::num_get< CharT, InIter >::M_extract_float(), std::operator>>(), std::basic_istream< CharT, Traits >::peek(), std::basic_istream< CharT, Traits >::read(), std::basic_istream< CharT, Traits >::readsome(), std::basic_istream< CharT, Traits >::sentry::sentry(), and std::ws().

const ios_base::iostate std::ios_base::failbit [static, inherited]

desired characters.

Definition at line 340 of file ios_base.h.

Referenced by std::basic_fstream< CharT, Traits >::close(), std::basic_ofstream< CharT, Traits >::close(), std::basic_ifstream< CharT, Traits >::close(), std::basic_ios< char, Traits >::fail(), std::basic_istream< CharT, Traits >::get(), std::getline(), std::basic_istream< CharT, Traits >::getline(), std::num_get< CharT, InIter >::M_extract_float(), std::num_get< CharT, InIter >::M_extract_int(), std::basic_fstream< CharT, Traits >::open(), std::basic_ofstream< CharT, Traits >::open(), std::basic_ifstream< CharT, Traits >::open(), std::basic_ostream< CharT, Traits >::operator<<(), std::basic_istream< CharT, Traits >::operator>>(), std::operator>>(), std::basic_istream< CharT, Traits >::read(), std::basic_istream< CharT, Traits >::seekg(), std::basic_ostream< CharT, Traits >::seekp(), std::basic_ostream< CharT, Traits >::sentry::sentry(), and std::basic_istream< CharT, Traits >::sentry::sentry().

const ios_base::iostate std::ios_base::goodbit [static, inherited]

Indicates all is well.

Definition at line 343 of file ios_base.h.

Referenced by std::basic_ostream< CharT, Traits >::flush(), std::basic_istream< CharT, Traits >::get(), std::getline(), std::basic_istream< CharT, Traits >::getline(), std::basic_istream< CharT, Traits >::ignore(), std::basic_ios< CharT, Traits >::init(), std::basic_ostream< CharT, Traits >::operator<<(), std::basic_istream< CharT, Traits >::operator>>(), std::operator>>(), std::basic_istream< CharT, Traits >::peek(), std::basic_ostream< CharT, Traits >::put(), std::basic_istream< CharT, Traits >::putback(), std::basic_istream< CharT, Traits >::read(), std::basic_istream< CharT, Traits >::readsome(), std::basic_istream< CharT, Traits >::seekg(), std::basic_ostream< CharT, Traits >::seekp(), std::basic_istream< CharT, Traits >::sentry::sentry(), std::basic_istream< CharT, Traits >::sync(), and std::basic_istream< CharT, Traits >::unget().

const ios_base::openmode std::ios_base::app [static, inherited]

Seek to end before each write.

Definition at line 362 of file ios_base.h.

Referenced by std::basic_stringbuf< CharT, Traits, Alloc >::M_stringbuf_init().

const ios_base::openmode std::ios_base::ate [static, inherited]

Open and seek to end immediately after opening.

Definition at line 365 of file ios_base.h.

Referenced by std::basic_stringbuf< CharT, Traits, Alloc >::M_stringbuf_init(), and std::basic_filebuf< CharT, Traits >::open().

const ios_base::openmode std::ios_base::binary [static, inherited]

http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#7 for more.

Definition at line 371 of file ios_base.h.

const ios_base::openmode std::ios_base::in [static, inherited]

Open for input. Default for ifstream and fstream.

Definition at line 374 of file ios_base.h.

Referenced by std::basic_filebuf< CharT, __gnu_cxx::enc_char_traits< CharT > >::M_set_buffer(), std::basic_stringbuf< CharT, Traits, Alloc >::M_sync(), std::basic_stringbuf< CharT, Traits, Alloc >::M_update_egptr(), std::basic_ifstream< CharT, Traits >::open(), std::basic_filebuf< CharT, Traits >::pbackfail(), std::basic_istream< CharT, Traits >::seekg(), std::strstreambuf::seekoff(), std::basic_stringbuf< CharT, Traits, Alloc >::seekoff(), std::basic_stringbuf< CharT, Traits, Alloc >::seekpos(), std::basic_filebuf< CharT, Traits >::showmanyc(), std::ios_base::sync_with_stdio(), std::basic_istream< CharT, Traits >::tellg(), std::basic_stringbuf< CharT, Traits, Alloc >::underflow(), std::basic_filebuf< CharT, Traits >::underflow(), and std::basic_filebuf< CharT, Traits >::xsgetn().

const ios_base::openmode std::ios_base::out [static, inherited]

Open for output. Default for ofstream and fstream.

Definition at line 377 of file ios_base.h.

Referenced by std::basic_filebuf< CharT, __gnu_cxx::enc_char_traits< CharT > >::M_set_buffer(), std::basic_stringbuf< CharT, Traits, Alloc >::M_sync(), std::basic_ofstream< CharT, Traits >::open(), std::basic_stringbuf< CharT, Traits, Alloc >::overflow(), std::basic_filebuf< CharT, Traits >::overflow(), std::strstreambuf::seekoff(), std::basic_stringbuf< CharT, Traits, Alloc >::seekoff(), std::basic_ostream< CharT, Traits >::seekp(), std::basic_stringbuf< CharT, Traits, Alloc >::seekpos(), std::ios_base::sync_with_stdio(), std::basic_ostream< CharT, Traits >::tellp(), and std::basic_filebuf< CharT, Traits >::xsputn().

const ios_base::openmode std::ios_base::trunc [static, inherited]

Open for input. Default for ofstream.

Definition at line 380 of file ios_base.h.

const ios_base::seekdir std::ios_base::beg [static, inherited]

Request a seek relative to the beginning of the stream.

Definition at line 395 of file ios_base.h.

Referenced by std::strstreambuf::seekoff(), __gnu_cxx::stdio_sync_filebuf< CharT, Traits >::seekoff(), std::strstreambuf::seekpos(), __gnu_cxx::stdio_sync_filebuf< CharT, Traits >::seekpos(), and std::basic_filebuf< CharT, Traits >::seekpos().

const ios_base::seekdir std::ios_base::cur [static, inherited]

Request a seek relative to the current position within the sequence.

Definition at line 398 of file ios_base.h.

Referenced by std::basic_filebuf< CharT, Traits >::imbue(), std::basic_filebuf< CharT, Traits >::pbackfail(), std::strstreambuf::seekoff(), __gnu_cxx::stdio_sync_filebuf< CharT, Traits >::seekoff(), std::basic_stringbuf< CharT, Traits, Alloc >::seekoff(), std::basic_filebuf< CharT, Traits >::seekoff(), std::basic_istream< CharT, Traits >::tellg(), and std::basic_ostream< CharT, Traits >::tellp().

const ios_base::seekdir std::ios_base::end [static, inherited]

Request a seek relative to the current end of the sequence.

Definition at line 401 of file ios_base.h.

Referenced by std::basic_filebuf< CharT, Traits >::open(), std::strstreambuf::seekoff(), and std::basic_stringbuf< CharT, Traits, Alloc >::seekoff().


The documentation for this class was generated from the following files:
Generated on Tue Jan 2 16:59:43 2007 for libstdc++-v3 Source by  doxygen 1.5.1