std::istrstream(3)

NAME

std::istrstream

SYNOPSIS

Inherits std::basic_istream< char >.
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_istream< char, Traits > __istream_type
typedef num_get< char, istreambuf_iterator< char, Traits >
> num_get_type
typedef ctype< char > ctype_type
typedef num_put< char, ostreambuf_iterator< char, Traits >
> num_put_type
enum event
    The set of events that  may  be  passed  to  an  event
callback.
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
istrstream (char *)
istrstream (const char *)
istrstream (char *, streamsize)
istrstream (const char *, streamsize)
virtual ~istrstream ()
strstreambuf * rdbuf () const
    Accessing the underlying buffer.
char * str ()
__istream_type      &      operator>>      (__istream_type
&(*__pf)(__istream_type &))
    Interface for manipulators.
__istream_type & operator>> (bool &n)
    Basic arithmetic extractors.
__istream_type & operator>> (streambuf_type *sb)
    Extracting into another streambuf.
streamsize gcount () const
    Character counting.
int_type get ()
    Simple extraction.
__istream_type & get (char_type &c)
    Simple extraction.
__istream_type  &  get  (char_type   *s,   streamsize   n,
char_type __delim)
    Simple multiple-character extraction.
__istream_type & get (char_type *s, streamsize n)
    Simple multiple-character extraction.
__istream_type  & get (streambuf_type &sb, char_type __delim)
    Extraction into another streambuf.
__istream_type & get (streambuf_type &sb)
    Extraction into another streambuf.
__istream_type &  getline  (char_type  *s,  streamsize  n,
char_type __delim)
    String extraction.
__istream_type & getline (char_type *s, streamsize n)
    String extraction.
__istream_type  &  ignore  (streamsize n=1, int_type __delim=traits_type::eof())
    Discarding characters.
int_type peek ()
    Looking ahead in the stream.
__istream_type & read (char_type *s, streamsize n)
    Extraction without delimiters.
streamsize readsome (char_type *s, streamsize n)
    Extraction until the buffer is exhausted, but no more.
__istream_type & putback (char_type c)
    Unextracting a single character.
__istream_type & unget ()
    Unextracting the previous character.
int sync ()
    Synchronizing the stream buffer.
pos_type tellg ()
    Getting the current read position.
__istream_type & seekg (pos_type)
    Changing the current read position.
__istream_type & seekg (off_type, ios_base::seekdir)
    Changing the current read 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_ios & copyfmt (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 locale & M_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
streamsize M_gcount
basic_ostream< char, Traits > * M_tie
char_type M_fill
bool M_fill_init
basic_streambuf< char, Traits > * M_streambuf
const ctype_type * M_ctype
const num_put_type * M_num_put
const num_get_type * M_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 124 of file strstream.

Member Typedef Documentation

typedef char std::basic_istream< 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 pa
rameters, which are specific to the implementation.
Reimplemented from std::basic_ios< char, Traits >.
Definition at line 63 of file istream.
typedef IosFmtflags std::ios_base::fmtflags [inherited]
This is a bitmask type.
· 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.
typedef IosIostate std::ios_base::iostate [inherited]
This is a bitmask type.
· badbit
· eofbit
· failbit
· goodbit
Definition at line 328 of file ios_base.h.
typedef IosOpenmode std::ios_base::openmode [inherited]
This is a bitmask type.
· app
· ate
· binary
· in
· out
· trunc
Definition at line 359 of file ios_base.h.
typedef IosSeekdir std::ios_base::seekdir [inherited]
This is an enumerated type.
· beg
· cur, equivalent to SEEKCUR in the C standard library.
· end, equivalent to SEEKEND in the C standard library.
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(). im
bue_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::istrstream::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 356 of file strstream.cc.
__istream_type& std::basic_istream< char , Traits
>::operator>> (__istream_type &(*)(__istream_type &) __pf)
[inline, inherited]
Interface for manipulators.
Manuipulators such as std::ws and std::dec use these
functions in constructs like 'std::cin >> std::ws'. For more
information, see the iomanip header.
__istream_type& std::basic_istream< char , Traits
>::operator>> (bool & n) [inherited]
Basic arithmetic extractors.
Parameters:
A variable of builtin type.
Returns:
*this if successful
These functions use the stream's current locale (specifi
cally, the num_get facet) to parse the input data.
__istream_type& std::basic_istream< char , Traits
>::operator>> (streambuf_type * sb) [inherited]
Extracting into another streambuf.
Parameters:
sb A pointer to a streambuf
This function behaves like one of the basic arithmetic ex
tractors, 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 this stream and inserted in
to the sb streambuf until one of the following occurs:
· the input stream reaches end-of-file,
· insertion into the output buffer fails (in this case,
the character that would have been inserted is not extracted), or
· an exception occurs (and in this case is caught)
If the function inserts no characters, failbit is set.
streamsize std::basic_istream< char , Traits >::gcount ()
const [inline, inherited]
Character counting.
Returns:
The number of characters extracted by the previous un
formatted input function dispatched for this stream.
Definition at line 241 of file istream.
int_type std::basic_istream< char , Traits >::get (void)
[inherited]
Simple extraction.
Returns:
A character, or eof().
Tries to extract a character. If none are available, sets
failbit and returns traits::eof().
__istream_type& std::basic_istream< char , Traits >::get
(char_type & c) [inherited]
Simple extraction.
Parameters:
c The character in which to store data.
Returns:
*this
Tries to extract a character and store it in c. If none
are available, sets failbit and returns traits::eof().
Note:
This function is not overloaded on signed char and un
signed char.
__istream_type& std::basic_istream< char , Traits >::get
(char_type * s, streamsize n, char_type __delim) [inherited]
Simple multiple-character extraction.
Parameters:
s Pointer to an array.
n Maximum number of characters to store in s.
delim A 'stop' character.
Returns:
*this
Characters are extracted and stored into s until one of
the following happens:
· n-1 characters are stored
· the input sequence reaches EOF
· the next character equals delim, in which case the char
acter is not extracted
If no characters are stored, failbit is set in the
stream's error state.
In any case, a null character is stored into the next lo
cation in the array.
Note:
This function is not overloaded on signed char and un
signed char.
__istream_type& std::basic_istream< char , Traits >::get
(char_type * s, streamsize n) [inline, inherited]
Simple multiple-character extraction.
Parameters:
s Pointer to an array.
n Maximum number of characters to store in s.
Returns:
*this
Returns get(s,n,widen('
Definition at line 325 of file istream.
References std::basic_istream< CharT, Traits >::get().
__istream_type& std::basic_istream< char , Traits >::get
(streambuf_type & sb, char_type __delim) [inherited]
Extraction into another streambuf.
Parameters:
sb A streambuf in which to store data.
delim A 'stop' character.
Returns:
*this
Characters are extracted and inserted into sb until one of
the following happens:
· the input sequence reaches EOF
· insertion into the output buffer fails (in this case,
the character that would have been inserted is not extracted)
· the next character equals delim (in this case, the char
acter is not extracted)
· an exception occurs (and in this case is caught)
If no characters are stored, failbit is set in the
stream's error state.
__istream_type& std::basic_istream< char , Traits >::get
(streambuf_type & sb) [inline, inherited]
Extraction into another streambuf.
Parameters:
sb A streambuf in which to store data.
Returns:
*this
Returns get(sb,widen('
Definition at line 358 of file istream.
References std::basic_istream< CharT, Traits >::get().
__istream_type& std::basic_istream< char , Traits >::getline
(char_type * s, streamsize n, char_type __delim) [inherited]
String extraction.
Parameters:
s A character array in which to store the data.
n Maximum number of characters to extract.
delim A 'stop' character.
Returns:
*this
Extracts and stores characters into s until one of the
following happens. Note that these criteria are required to be
tested in the order listed here, to allow an input line to exact
ly fill the s array without setting failbit.
1. the input sequence reaches end-of-file, in which case
eofbit is set in the stream error state
2. the next character equals delim, in which case the
character is extracted (and therefore counted in gcount()) but
not stored
3. n-1 characters are stored, in which case failbit is
set in the stream error state
If no characters are extracted, failbit is set. (An empty
line of input should therefore not cause failbit to be set.)
In any case, a null character is stored in the next loca
tion in the array.
__istream_type& std::basic_istream< char , Traits >::getline
(char_type * s, streamsize n) [inline, inherited] String extraction.
Parameters:
s A character array in which to store the data.
n Maximum number of characters to extract.
Returns:
*this
Returns getline(s,n,widen('
Definition at line 398 of file istream.
References std::basic_istream< CharT, Traits >::getline().
__istream_type& std::basic_istream< char , Traits >::ignore
(streamsize n = 1, int_type __delim = traits_type::eof())
[inherited]
Discarding characters.
Parameters:
n Number of characters to discard.
delim A 'stop' character.
Returns:
*this
Extracts characters and throws them away until one of the
following happens:
· if n != std::numeric_limits<int>::max(), n characters
are extracted
· the input sequence reaches end-of-file
· the next character equals delim (in this case, the char
acter is extracted); note that this condition will never occur if
delim equals traits::eof().
int_type std::basic_istream< char , Traits >::peek (void)
[inherited]
Looking ahead in the stream.
Returns:
The next character, or eof().
If, after constructing the sentry object, good() is false,
returns traits::eof(). Otherwise reads but does not extract the
next input character.
__istream_type& std::basic_istream< char , Traits >::read
(char_type * s, streamsize n) [inherited] Extraction without delimiters.
Parameters:
s A character array.
n Maximum number of characters to store.
Returns:
*this
If the stream state is good(), extracts characters and
stores them into s until one of the following happens:
· n characters are stored
· the input sequence reaches end-of-file, in which case
the error state is set to failbit|eofbit.
Note:This function is not overloaded on signed char and un
signed char.
streamsize std::basic_istream< char , Traits >::readsome
(char_type * s, streamsize n) [inherited] Extraction until the buffer is exhausted, but no more.
Parameters:
s A character array.
n Maximum number of characters to store.
Returns:
The number of characters extracted.
Extracts characters and stores them into s depending on
the number of characters remaining in the streambuf's buffer,
rdbuf()->in_avail(), called A here:
· if A == -1, sets eofbit and extracts no characters
· if A == 0, extracts no characters
· if A > 0, extracts min(A,n)
The goal is to empty the current buffer, and to not re
quest any more from the external input sequence controlled by the
streambuf.
__istream_type& std::basic_istream< char , Traits >::putback
(char_type c) [inherited]
Unextracting a single character.
Parameters:
c The character to push back into the input stream.
Returns:
*this
If rdbuf() is not null, calls rdbuf()->sputbackc(c).
If rdbuf() is null or if sputbackc() fails, sets badbit in
the error state.
Note:
Since no characters are extracted, the next call to
gcount() will return 0, as required by DR 60.
__istream_type& std::basic_istream< char , Traits >::unget
(void) [inherited]
Unextracting the previous character.
Returns:
*this
If rdbuf() is not null, calls rdbuf()->sungetc(c).
If rdbuf() is null or if sungetc() fails, sets badbit in
the error state.
Note:
Since no characters are extracted, the next call to
gcount() will return 0, as required by DR 60.
int std::basic_istream< char , Traits >::sync (void)
[inherited]
Synchronizing the stream buffer.
Returns:
0 on success, -1 on failure
If rdbuf() is a null pointer, returns -1.
Otherwise, calls rdbuf()->pubsync(), and if that returns
-1, sets badbit and returns -1.
Otherwise, returns 0.
Note:
This function does not count the number of characters
extracted, if any, and therefore does not affect the next call to
gcount().
pos_type std::basic_istream< char , Traits >::tellg (void)
[inherited]
Getting the current read position.
Returns:
A file position object.
If fail() is not false, returns pos_type(-1) to indicate
failure. Otherwise returns rdbuf()->pubseekoff(0,cur,in).
Note:
This function does not count the number of characters
extracted, if any, and therefore does not affect the next call to
gcount().
__istream_type& std::basic_istream< char , Traits >::seekg
(pos_type) [inherited]
Changing the current read position.
Parameters:
pos A file position object.
Returns:
*this
If fail() is not true, calls rdbuf()->pubseekpos(pos). If
that function fails, sets failbit.
Note:
This function does not count the number of characters
extracted, if any, and therefore does not affect the next call to
gcount().
__istream_type& std::basic_istream< char , Traits >::seekg
(off_type, ios_base::seekdir) [inherited] Changing the current read 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.

Note:
This function does not count the number of characters
extracted, if any, and therefore does not affect the next call to
gcount().
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::fail
bit.
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 val
ue.
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_termi
nate_handler);
std::ifstream f ('/etc/motd');
std::cerr << 'Setting badbit0;
f.setstate (std::ios_base::badbit);
std::cerr << 'Setting exception mask0;
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 cor
rect, 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+ char
acters have been requested (e.g., via setw), Q characters are ac
tually 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 as
sociated with this stream, calls that buffer's pubimbue(loc).
Additional l10n notes are at http://gcc.gnu.org/online
docs/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()).nar
row(c,dfault)
Additional l10n notes are at http://gcc.gnu.org/online
docs/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/online
docs/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 vir
tual 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 in
voked.
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 call
backs, 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_ex
tract(), 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_in
sert_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::opera
tor<<(), 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 opera
tions.
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::opera
tor<<(), 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 opera
tions.
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_in
sert_float(), std::num_put< CharT, OutIter >::M_insert_int(),
__gnu_cxx::operator<<(), std::operator<<(), and std::opera
tor>>().
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 synchro
nized.
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_inter
nal::buf_cerr_sync, __gnu_internal::buf_cin, __gnu_inter
nal::buf_cin_sync, __gnu_internal::buf_cout, __gnu_inter
nal::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 func
tion 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 gen
erating 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 ex
pectation 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 in
cremented and returned on each invocation. xalloc is guaranteed
to return an index that is safe to use in the iword and pword ar
rays.
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 initial
ized 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 initial
ized 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 for
mat.
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 dec
imal 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 hex
adecimal 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_ex
tract_int(), std::num_put< CharT, OutIter >::M_group_int(),
std::basic_ostream< CharT, Traits >::operator<<(), std::basic_os
tream< char >::operator<<(), std::operator<<(), and std::opera
tor>>().
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 oc
tal 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::show
base().
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_for
mat_float(), and std::showpoint().
const ios_base::fmtflags std::ios_base::showpos [static,
inherited]Generates a + sign in non-negative generated numeric out
put.
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::nounit
buf(), 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_for
mat_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::mon
ey_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_for
mat_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::ba
sic_istream< CharT, Traits >::ignore(), std::basic_ios< CharT,
Traits >::init(), std::ios_base::M_grow_words(), std::basic_os
tream< 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::ba
sic_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_os
tream< 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_week
day(), std::time_get< CharT, InIter >::do_get_year(), std::ba
sic_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::ba
sic_istream< CharT, Traits >::peek(), std::basic_istream< CharT,
Traits >::read(), std::basic_istream< CharT, Traits >::read
some(), 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::ba
sic_fstream< CharT, Traits >::open(), std::basic_ofstream< CharT,
Traits >::open(), std::basic_ifstream< CharT, Traits >::open(),
std::basic_ostream< CharT, Traits >::operator<<(), std::ba
sic_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::sen
try(), 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::get
line(), std::basic_istream< CharT, Traits >::getline(), std::ba
sic_istream< CharT, Traits >::ignore(), std::basic_ios< CharT,
Traits >::init(), std::basic_ostream< CharT, Traits >::opera
tor<<(), 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::ba
sic_stringbuf< CharT, Traits, Alloc >::M_sync(), std::ba
sic_stringbuf< CharT, Traits, Alloc >::M_update_egptr(), std::ba
sic_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::ba
sic_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::ba
sic_stringbuf< CharT, Traits, Alloc >::M_sync(), std::basic_of
stream< CharT, Traits >::open(), std::basic_stringbuf< CharT,
Traits, Alloc >::overflow(), std::basic_filebuf< CharT, Traits
>::overflow(), std::strstreambuf::seekoff(), std::basic_string
buf< CharT, Traits, Alloc >::seekoff(), std::basic_ostream<
CharT, Traits >::seekp(), std::basic_stringbuf< CharT, Traits,
Alloc >::seekpos(), std::ios_base::sync_with_stdio(), std::ba
sic_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 >::im
bue(), 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 se
quence.
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().

Author

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from the source code.
libstdc++-v3 Source 1 Jan 2007

std::istrstream(3)

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