std::ios_base Class Reference

The very top of the I/O class hierarchy. More...

#include <ios_base.h>

Inheritance diagram for std::ios_base:

List of all members.

Public Types
typedef _Ios_Fmtflags	fmtflags
	This is a bitmask type.
typedef _Ios_Iostate	iostate
	This is a bitmask type.
typedef _Ios_Openmode	openmode
	This is a bitmask type.
typedef _Ios_Seekdir	seekdir
	This is an enumerated type.
typedef void(*	event_callback )(event, ios_base &, int)
	The type of an event callback function.
enum	event { erase_event, imbue_event, copyfmt_event }
	The set of events that may be passed to an event callback. More...
Public Member Functions
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	imbue (const locale &__loc)
	Setting a new locale.
locale	getloc () const
	Locale access.
const locale &	_M_getloc () const
	Locale access.
long &	iword (int __ix)
	Access to integer array.
void *&	pword (int __ix)
	Access to void pointer array.
virtual	~ios_base ()
Static Public Member Functions
bool	sync_with_stdio (bool __sync=true)
	Interaction with the standard C I/O objects.
int	xalloc () throw ()
	Access to unique indices.
Static Public Attributes
const fmtflags	boolalpha = fmtflags(__ios_flags::_S_boolalpha)
	Insert/extract bool in alphabetic rather than numeric format.
const fmtflags	dec = fmtflags(__ios_flags::_S_dec)
	Converts integer input or generates integer output in decimal base.
const fmtflags	fixed = fmtflags(__ios_flags::_S_fixed)
	Generate floating-point output in fixed-point notation.
const fmtflags	hex = fmtflags(__ios_flags::_S_hex)
	Converts integer input or generates integer output in hexadecimal base.
const fmtflags	internal = fmtflags(__ios_flags::_S_internal)
const fmtflags	left = fmtflags(__ios_flags::_S_left)
const fmtflags	oct = fmtflags(__ios_flags::_S_oct)
	Converts integer input or generates integer output in octal base.
const fmtflags	right = fmtflags(__ios_flags::_S_right)
const fmtflags	scientific = fmtflags(__ios_flags::_S_scientific)
	Generates floating-point output in scientific notation.
const fmtflags	showbase = fmtflags(__ios_flags::_S_showbase)
const fmtflags	showpoint = fmtflags(__ios_flags::_S_showpoint)
const fmtflags	showpos = fmtflags(__ios_flags::_S_showpos)
	Generates a + sign in non-negative generated numeric output.
const fmtflags	skipws = fmtflags(__ios_flags::_S_skipws)
	Skips leading white space before certain input operations.
const fmtflags	unitbuf = fmtflags(__ios_flags::_S_unitbuf)
	Flushes output after each output operation.
const fmtflags	uppercase = fmtflags(__ios_flags::_S_uppercase)
const fmtflags	adjustfield = fmtflags(__ios_flags::_S_adjustfield)
	A mask of left|right|internal. Useful for the 2-arg form of setf.
const fmtflags	basefield = fmtflags(__ios_flags::_S_basefield)
	A mask of dec|oct|hex. Useful for the 2-arg form of setf.
const fmtflags	floatfield = fmtflags(__ios_flags::_S_floatfield)
	A mask of scientific|fixed. Useful for the 2-arg form of setf.
const iostate	badbit = iostate(__ios_flags::_S_badbit)
const iostate	eofbit = iostate(__ios_flags::_S_eofbit)
	Indicates that an input operation reached the end of an input sequence.
const iostate	failbit = iostate(__ios_flags::_S_failbit)
const iostate	goodbit = iostate(0)
	Indicates all is well.
const openmode	app = openmode(__ios_flags::_S_app)
	Seek to end before each write.
const openmode	ate = openmode(__ios_flags::_S_ate)
	Open and seek to end immediately after opening.
const openmode	binary = openmode(__ios_flags::_S_bin)
const openmode	in = openmode(__ios_flags::_S_in)
	Open for input. Default for ifstream and fstream.
const openmode	out = openmode(__ios_flags::_S_out)
	Open for output. Default for ofstream and fstream.
const openmode	trunc = openmode(__ios_flags::_S_trunc)
	Open for input. Default for ofstream.
const seekdir	beg = seekdir(0)
	Request a seek relative to the beginning of the stream.
const seekdir	cur = seekdir(SEEK_CUR)
	Request a seek relative to the current position within the sequence.
const seekdir	end = seekdir(SEEK_END)
	Request a seek relative to the current end of the sequence.
Protected Member Functions
void	_M_call_callbacks (event __ev) throw ()
void	_M_dispose_callbacks (void)
_Words &	_M_grow_words (int __index, bool __iword)
void	_M_init ()
	ios_base ()
Protected Attributes
_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
const int	_S_local_word_size = 8
Private Member Functions
	ios_base (const ios_base &)
ios_base &	operator= (const ios_base &)

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Detailed Description

The very top of the I/O class hierarchy.

This class defines everything that can be defined about I/O that does not depend on the type of characters being input or output. Most people will only see ios_base when they need to specify the full name of the various I/O flags (e.g., the openmodes).

Definition at line 201 of file ios_base.h.

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Member Typedef Documentation

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

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. Referenced by std::ios_base::_Callback_list::_Callback_list().

typedef _Ios_Fmtflags std::ios_base::fmtflags

This is a bitmask type. "_Ios_Fmtflags" 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: boolalpha dec fixed hex internal left oct right scientific showbase showpoint showpos skipws unitbuf uppercase adjustfield basefield floatfield Definition at line 253 of file ios_base.h. Referenced by std::__int_to_char(), std::money_put< _CharT, _OutIter >::_M_insert(), std::__pad< _CharT, _Traits >::_S_pad(), std::num_get< _CharT, _InIter >::do_get(), std::num_put< _CharT, _OutIter >::do_put(), std::basic_ostream< _CharT, _Traits >::operator<<(), std::basic_ostream< char >::operator<<(), std::operator<<(), std::operator>>(), std::resetiosflags(), and std::setiosflags().

typedef _Ios_Iostate std::ios_base::iostate

This is a bitmask type. "_Ios_Iostate" 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: badbit eofbit failbit goodbit Definition at line 328 of file ios_base.h. Referenced by std::money_get< _CharT, _InIter >::_M_extract(), std::time_get< _CharT, _InIter >::_M_extract_name(), std::time_get< _CharT, _InIter >::_M_extract_num(), std::time_get< _CharT, _InIter >::_M_extract_via_format(), std::money_get< _CharT, _InIter >::do_get(), 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_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::moneypunct< _CharT, _Intl >::moneypunct(), std::numpunct< _CharT >::numpunct(), std::basic_ostream< _CharT, _Traits >::operator<<(), std::operator>>(), std::basic_istream< _CharT, _Traits >::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(), std::collate< _CharT >::transform(), std::basic_istream< _CharT, _Traits >::unget(), and std::__numpunct_cache< _CharT >::~__numpunct_cache().

typedef _Ios_Openmode std::ios_base::openmode

This is a bitmask type. "_Ios_Openmode" 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: app ate binary in out trunc Definition at line 359 of file ios_base.h. Referenced by std::basic_stringbuf< _CharT, _Traits, _Alloc >::_M_stringbuf_init(), std::basic_fstream< _CharT, _Traits >::basic_fstream(), std::basic_ifstream< _CharT, _Traits >::basic_ifstream(), std::basic_istringstream< _CharT, _Traits, _Alloc >::basic_istringstream(), std::basic_ofstream< _CharT, _Traits >::basic_ofstream(), std::basic_ostringstream< _CharT, _Traits, _Alloc >::basic_ostringstream(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::basic_stringbuf(), std::basic_stringstream< _CharT, _Traits, _Alloc >::basic_stringstream(), std::basic_filebuf< _CharT, _Traits >::close(), std::basic_filebuf< _CharT, _Traits >::open(), std::basic_fstream< _CharT, _Traits >::open(), std::basic_ofstream< _CharT, _Traits >::open(), std::basic_ifstream< _CharT, _Traits >::open(), std::basic_streambuf< _CharT, enc_char_traits< _CharT > >::pubseekoff(), std::basic_streambuf< _CharT, enc_char_traits< _CharT > >::pubseekpos(), std::basic_streambuf< _CharT, enc_char_traits< _CharT > >::seekoff(), __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >::seekoff(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), std::basic_filebuf< _CharT, _Traits >::seekoff(), std::basic_streambuf< _CharT, enc_char_traits< _CharT > >::seekpos(), __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >::seekpos(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), std::basic_filebuf< _CharT, _Traits >::seekpos(), and __gnu_cxx::stdio_filebuf< _CharT, _Traits >::stdio_filebuf().

typedef _Ios_Seekdir std::ios_base::seekdir

This is an enumerated type. "_Ios_Seekdir" is implementation-defined. Defined values of type seekdir are: beg cur, equivalent to SEEK_CUR in the C standard library. end, equivalent to SEEK_END in the C standard library. Definition at line 392 of file ios_base.h. Referenced by std::basic_filebuf< _CharT, _Traits >::_M_seek(), std::basic_streambuf< _CharT, enc_char_traits< _CharT > >::pubseekoff(), std::basic_istream< _CharT, _Traits >::seekg(), std::basic_streambuf< _CharT, enc_char_traits< _CharT > >::seekoff(), __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >::seekoff(), std::basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), std::basic_filebuf< _CharT, _Traits >::seekoff(), and std::basic_ostream< _CharT, _Traits >::seekp().

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Member Enumeration Documentation

enum std::ios_base::event

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(). Enumeration values: erase_event  imbue_event  copyfmt_event  Definition at line 420 of file ios_base.h.

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Constructor & Destructor Documentation

virtual std::ios_base::~ios_base (   )  [virtual]

Invokes each callback with erase_event. Destroys local storage. Note that the ios_base object for the standard streams never gets destroyed. As a result, any callbacks registered with the standard streams will not get invoked with erase_event (unless copyfmt is used).

std::ios_base::ios_base (   )  [protected]

std::ios_base::ios_base (  const ios_base &   )  [private]

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Member Function Documentation

void std::ios_base::_M_call_callbacks (  event  __ev  )  throw () [protected]

Referenced by std::basic_ios< _CharT, _Traits >::copyfmt().

void std::ios_base::_M_dispose_callbacks (  void   )  [protected]

Referenced by std::basic_ios< _CharT, _Traits >::copyfmt().

const locale& std::ios_base::_M_getloc (   )  const [inline]

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. References _M_ios_locale. Referenced by std::money_get< _CharT, _InIter >::_M_extract(), std::time_get< _CharT, _InIter >::_M_extract_name(), std::time_get< _CharT, _InIter >::_M_extract_num(), std::time_get< _CharT, _InIter >::_M_extract_via_format(), std::money_put< _CharT, _OutIter >::_M_insert(), std::__pad< _CharT, _Traits >::_S_pad(), std::money_get< _CharT, _InIter >::do_get(), 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::time_put< _CharT, _OutIter >::do_put(), std::num_put< _CharT, _OutIter >::do_put(), and std::time_put< _CharT, _OutIter >::put().

_Words& std::ios_base::_M_grow_words (  int  __index, bool  __iword )  [protected]

Referenced by iword(), and pword().

void std::ios_base::_M_init (   )  [protected]

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

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. References _M_flags.

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

Access to format flags. Returns: The format control flags for both input and output. Definition at line 550 of file ios_base.h. References _M_flags. Referenced by std::money_get< _CharT, _InIter >::_M_extract(), std::money_put< _CharT, _OutIter >::_M_insert(), std::__pad< _CharT, _Traits >::_S_pad(), std::basic_ios< _CharT, _Traits >::copyfmt(), std::num_get< _CharT, _InIter >::do_get(), std::num_put< _CharT, _OutIter >::do_put(), std::basic_ostream< _CharT, _Traits >::operator<<(), std::basic_ostream< char >::operator<<(), std::operator<<(), and std::basic_istream< _CharT, _Traits >::sentry::sentry().

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

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. References _M_ios_locale. Referenced by std::basic_ios< _CharT, _Traits >::copyfmt(), std::money_put< _CharT, _OutIter >::do_put(), std::operator>>(), and std::ws().

locale std::ios_base::imbue (  const locale &  __loc  )

Setting a new locale. Parameters: loc  The new locale. Returns: The previous locale. Sets the new locale for this stream, and then invokes each callback with imbue_event. Reimplemented in std::basic_ios< _CharT, _Traits >, and std::basic_ios< char, _Traits >.

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

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. References _M_grow_words(), std::ios_base::_Words::_M_iword, _M_word, and _M_word_size.

ios_base& std::ios_base::operator= (  const ios_base &   )  [private]

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

Changing flags. Parameters: prec  The new precision value. Returns: The previous value of precision(). Definition at line 628 of file ios_base.h. References _M_precision, and std::streamsize.

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

Flags access. Returns: The precision to generate on certain output operations. Definition at line 620 of file ios_base.h. References _M_precision. Referenced by std::basic_ios< _CharT, _Traits >::copyfmt(), std::operator<<(), and std::operator>>().

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

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. References _M_grow_words(), std::ios_base::_Words::_M_pword, _M_word, and _M_word_size.

void std::ios_base::register_callback (  event_callback  __fn, int  __index )

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.

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

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. References _M_flags.

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

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. References _M_flags. 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().

bool std::ios_base::sync_with_stdio (  bool  __sync = true  )  [static]

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.

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

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

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

Changing flags. Parameters: wide  The new width value. Returns: The previous value of width(). Definition at line 650 of file ios_base.h. References _M_width, and std::streamsize.

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

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. References _M_width. Referenced by std::money_put< _CharT, _OutIter >::_M_insert(), std::basic_ios< _CharT, _Traits >::copyfmt(), std::num_put< _CharT, _OutIter >::do_put(), std::operator<<(), and std::operator>>().

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

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.

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Member Data Documentation

_Callback_list* std::ios_base::_M_callbacks [protected]

Definition at line 489 of file ios_base.h. Referenced by std::basic_ios< _CharT, _Traits >::copyfmt().

iostate std::ios_base::_M_exception [protected]

Definition at line 462 of file ios_base.h.

fmtflags std::ios_base::_M_flags [protected]

Definition at line 461 of file ios_base.h. Referenced by flags(), setf(), and unsetf().

locale std::ios_base::_M_ios_locale [protected]

Definition at line 521 of file ios_base.h. Referenced by _M_getloc(), and getloc().

_Words std::ios_base::_M_local_word[_S_local_word_size] [protected]

Definition at line 511 of file ios_base.h.

streamsize std::ios_base::_M_precision [protected]

Definition at line 459 of file ios_base.h. Referenced by precision().

iostate std::ios_base::_M_streambuf_state [protected]

Definition at line 463 of file ios_base.h.

streamsize std::ios_base::_M_width [protected]

Definition at line 460 of file ios_base.h. Referenced by width().

_Words* std::ios_base::_M_word [protected]

Definition at line 515 of file ios_base.h. Referenced by std::basic_ios< _CharT, _Traits >::copyfmt(), iword(), and pword().

int std::ios_base::_M_word_size [protected]

Definition at line 514 of file ios_base.h. Referenced by std::basic_ios< _CharT, _Traits >::copyfmt(), iword(), and pword().

_Words std::ios_base::_M_word_zero [protected]

Definition at line 506 of file ios_base.h.

const int std::ios_base::_S_local_word_size = 8 [static, protected]

Definition at line 510 of file ios_base.h.

const fmtflags std::ios_base::adjustfield = fmtflags(__ios_flags::_S_adjustfield) [static]

A mask of left|right|internal. Useful for the 2-arg form of setf. Definition at line 308 of file ios_base.h.

const openmode std::ios_base::app = openmode(__ios_flags::_S_app) [static]

Seek to end before each write. Definition at line 362 of file ios_base.h.

const openmode std::ios_base::ate = openmode(__ios_flags::_S_ate) [static]

Open and seek to end immediately after opening. Definition at line 365 of file ios_base.h.

const iostate std::ios_base::badbit = iostate(__ios_flags::_S_badbit) [static]

Indicates a loss of integrity in an input or output sequence (such as an irrecoverable read error from a file). Definition at line 332 of file ios_base.h.

const fmtflags std::ios_base::basefield = fmtflags(__ios_flags::_S_basefield) [static]

A mask of dec|oct|hex. Useful for the 2-arg form of setf. Definition at line 311 of file ios_base.h.

const seekdir std::ios_base::beg = seekdir(0) [static]

Request a seek relative to the beginning of the stream. Definition at line 395 of file ios_base.h.

const openmode std::ios_base::binary = openmode(__ios_flags::_S_bin) [static]

Perform input and output in binary mode (as opposed to text mode). This is probably not what you think it is; see http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#3 and http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#7 for more. Definition at line 371 of file ios_base.h.

const fmtflags std::ios_base::boolalpha = fmtflags(__ios_flags::_S_boolalpha) [static]

Insert/extract bool in alphabetic rather than numeric format. Definition at line 256 of file ios_base.h.

const seekdir std::ios_base::cur = seekdir(SEEK_CUR) [static]

Request a seek relative to the current position within the sequence. Definition at line 398 of file ios_base.h.

const fmtflags std::ios_base::dec = fmtflags(__ios_flags::_S_dec) [static]

Converts integer input or generates integer output in decimal base. Definition at line 259 of file ios_base.h.

const seekdir std::ios_base::end = seekdir(SEEK_END) [static]

Request a seek relative to the current end of the sequence. Definition at line 401 of file ios_base.h.

const iostate std::ios_base::eofbit = iostate(__ios_flags::_S_eofbit) [static]

Indicates that an input operation reached the end of an input sequence. Definition at line 335 of file ios_base.h.

const iostate std::ios_base::failbit = iostate(__ios_flags::_S_failbit) [static]

Indicates that an input operation failed to read the expected characters, or that an output operation failed to generate the desired characters. Definition at line 340 of file ios_base.h.

const fmtflags std::ios_base::fixed = fmtflags(__ios_flags::_S_fixed) [static]

Generate floating-point output in fixed-point notation. Definition at line 262 of file ios_base.h.

const fmtflags std::ios_base::floatfield = fmtflags(__ios_flags::_S_floatfield) [static]

A mask of scientific|fixed. Useful for the 2-arg form of setf. Definition at line 314 of file ios_base.h.

const iostate std::ios_base::goodbit = iostate(0) [static]

Indicates all is well. Definition at line 343 of file ios_base.h.

const fmtflags std::ios_base::hex = fmtflags(__ios_flags::_S_hex) [static]

Converts integer input or generates integer output in hexadecimal base. Definition at line 265 of file ios_base.h.

const openmode std::ios_base::in = openmode(__ios_flags::_S_in) [static]

Open for input. Default for ifstream and fstream. Definition at line 374 of file ios_base.h.

const fmtflags std::ios_base::internal = fmtflags(__ios_flags::_S_internal) [static]

Adds fill characters at a designated internal point in certain generated output, or identical to right if no such point is designated. Definition at line 270 of file ios_base.h.

const fmtflags std::ios_base::left = fmtflags(__ios_flags::_S_left) [static]

Adds fill characters on the right (final positions) of certain generated output. (I.e., the thing you print is flush left.) Definition at line 274 of file ios_base.h.

const fmtflags std::ios_base::oct = fmtflags(__ios_flags::_S_oct) [static]

Converts integer input or generates integer output in octal base. Definition at line 277 of file ios_base.h.

const openmode std::ios_base::out = openmode(__ios_flags::_S_out) [static]

Open for output. Default for ofstream and fstream. Definition at line 377 of file ios_base.h.

const fmtflags std::ios_base::right = fmtflags(__ios_flags::_S_right) [static]

Adds fill characters on the left (initial positions) of certain generated output. (I.e., the thing you print is flush right.) Definition at line 281 of file ios_base.h.

const fmtflags std::ios_base::scientific = fmtflags(__ios_flags::_S_scientific) [static]

Generates floating-point output in scientific notation. Definition at line 284 of file ios_base.h.

const fmtflags std::ios_base::showbase = fmtflags(__ios_flags::_S_showbase) [static]

Generates a prefix indicating the numeric base of generated integer output. Definition at line 288 of file ios_base.h.

const fmtflags std::ios_base::showpoint = fmtflags(__ios_flags::_S_showpoint) [static]

Generates a decimal-point character unconditionally in generated floating-point output. Definition at line 292 of file ios_base.h.

const fmtflags std::ios_base::showpos = fmtflags(__ios_flags::_S_showpos) [static]

Generates a + sign in non-negative generated numeric output. Definition at line 295 of file ios_base.h.

const fmtflags std::ios_base::skipws = fmtflags(__ios_flags::_S_skipws) [static]

Skips leading white space before certain input operations. Definition at line 298 of file ios_base.h.

const openmode std::ios_base::trunc = openmode(__ios_flags::_S_trunc) [static]

Open for input. Default for ofstream. Definition at line 380 of file ios_base.h.

const fmtflags std::ios_base::unitbuf = fmtflags(__ios_flags::_S_unitbuf) [static]

Flushes output after each output operation. Definition at line 301 of file ios_base.h.

const fmtflags std::ios_base::uppercase = fmtflags(__ios_flags::_S_uppercase) [static]

Replaces certain lowercase letters with their uppercase equivalents in generated output. Definition at line 305 of file ios_base.h.

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The documentation for this class was generated from the following file:

• ios_base.h

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