#include <basic_ios.h>
Inheritance diagram for std::basic_ios< CharT, Traits >:
Public Types | |
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. | |
enum | event |
The set of events that may be passed to an event callback. More... | |
typedef CharT | char_type |
typedef Traits::int_type | int_type |
typedef Traits::pos_type | pos_type |
typedef Traits::off_type | off_type |
typedef Traits | traits_type |
Public Member Functions | |
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. | |
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_ios (basic_streambuf< CharT, Traits > *sb) | |
Constructor performs initialization. | |
virtual | ~basic_ios () |
Empty. | |
basic_ostream< CharT, Traits > * | tie () const |
Fetches the current tied stream. | |
basic_ostream< CharT, Traits > * | tie (basic_ostream< CharT, Traits > *__tiestr) |
Ties this stream to an output stream. | |
basic_streambuf< CharT, Traits > * | rdbuf () const |
Accessing the underlying buffer. | |
basic_streambuf< CharT, Traits > * | rdbuf (basic_streambuf< CharT, 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. | |
operator void * () const | |
The quick-and-easy status check. | |
bool | operator! () const |
The quick-and-easy status check. | |
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 |
Insert/extract bool in alphabetic rather than numeric format. | |
const fmtflags | dec |
Converts integer input or generates integer output in decimal base. | |
const fmtflags | fixed |
Generate floating-point output in fixed-point notation. | |
const fmtflags | hex |
Converts integer input or generates integer output in hexadecimal base. | |
const fmtflags | internal |
Adds fill characters at a designated internal point in certain generated output, or identical to right if no such point is designated. | |
const fmtflags | left |
Adds fill characters on the right (final positions) of certain generated output. (I.e., the thing you print is flush left.). | |
const fmtflags | oct |
Converts integer input or generates integer output in octal base. | |
const fmtflags | right |
Adds fill characters on the left (initial positions) of certain generated output. (I.e., the thing you print is flush right.). | |
const fmtflags | scientific |
Generates floating-point output in scientific notation. | |
const fmtflags | showbase |
Generates a prefix indicating the numeric base of generated integer output. | |
const fmtflags | showpoint |
Generates a decimal-point character unconditionally in generated floating-point output. | |
const fmtflags | showpos |
Generates a + sign in non-negative generated numeric output. | |
const fmtflags | skipws |
Skips leading white space before certain input operations. | |
const fmtflags | unitbuf |
Flushes output after each output operation. | |
const fmtflags | uppercase |
Replaces certain lowercase letters with their uppercase equivalents in generated output. | |
const fmtflags | adjustfield |
A mask of left|right|internal. Useful for the 2-arg form of setf . | |
const fmtflags | basefield |
A mask of dec|oct|hex. Useful for the 2-arg form of setf . | |
const fmtflags | floatfield |
A mask of scientific|fixed. Useful for the 2-arg form of setf . | |
const iostate | badbit |
Indicates a loss of integrity in an input or output sequence (such as an irrecoverable read error from a file). | |
const iostate | eofbit |
Indicates that an input operation reached the end of an input sequence. | |
const iostate | failbit |
Indicates that an input operation failed to read the expected characters, or that an output operation failed to generate the desired characters. | |
const iostate | goodbit |
Indicates all is well. | |
const openmode | app |
Seek to end before each write. | |
const openmode | ate |
Open and seek to end immediately after opening. | |
const openmode | binary |
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. | |
const openmode | in |
Open for input. Default for ifstream and fstream. | |
const openmode | out |
Open for output. Default for ofstream and fstream. | |
const openmode | trunc |
Open for input. Default for ofstream . | |
const seekdir | beg |
Request a seek relative to the beginning of the stream. | |
const seekdir | cur |
Request a seek relative to the current position within the sequence. | |
const seekdir | end |
Request a seek relative to the current end of the sequence. | |
Protected Member Functions | |
basic_ios () | |
Empty. | |
void | init (basic_streambuf< CharT, Traits > *sb) |
All setup is performed here. |
Most of the member functions called dispatched on stream objects (e.g., std::cout.foo(bar)
;) are consolidated in this class.
Definition at line 56 of file basic_ios.h.
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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 in std::basic_ifstream< CharT, Traits >, std::basic_ofstream< CharT, Traits >, std::basic_fstream< CharT, Traits >, std::basic_istream< CharT, Traits >, std::basic_iostream< CharT, Traits >, std::basic_ostream< CharT, Traits >, std::basic_istringstream< CharT, Traits, Alloc >, std::basic_ostringstream< CharT, Traits, Alloc >, std::basic_stringstream< CharT, Traits, Alloc >, std::basic_istream< char, Traits >, std::basic_istream< char >, std::basic_iostream< char >, std::basic_ostream< char, Traits >, and std::basic_ostream< char >. Definition at line 65 of file basic_ios.h. Referenced by std::basic_ios< CharT, Traits >::narrow(). |
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The type of an event callback function.
Referenced by std::ios_base::register_callback(). |
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This is a bitmask type.
Referenced by std::num_get< CharT, InIter >::do_get(), std::num_put< CharT, OutIter >::do_put(), std::ios_base::flags(), std::basic_ostream< CharT, Traits >::operator<<(), std::basic_ostream< char >::operator<<(), std::resetiosflags(), std::ios_base::setf(), std::setiosflags(), and std::ios_base::unsetf(). |
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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 in std::basic_ifstream< CharT, Traits >, std::basic_ofstream< CharT, Traits >, std::basic_fstream< CharT, Traits >, std::basic_istream< CharT, Traits >, std::basic_iostream< CharT, Traits >, std::basic_ostream< CharT, Traits >, std::basic_istringstream< CharT, Traits, Alloc >, std::basic_ostringstream< CharT, Traits, Alloc >, std::basic_stringstream< CharT, Traits, Alloc >, std::basic_istream< char, Traits >, std::basic_istream< char >, std::basic_iostream< char >, std::basic_ostream< char, Traits >, and std::basic_ostream< char >. Definition at line 66 of file basic_ios.h. |
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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 in std::basic_ifstream< CharT, Traits >, std::basic_ofstream< CharT, Traits >, std::basic_fstream< CharT, Traits >, std::basic_istream< CharT, Traits >, std::basic_iostream< CharT, Traits >, std::basic_ostream< CharT, Traits >, std::basic_istringstream< CharT, Traits, Alloc >, std::basic_ostringstream< CharT, Traits, Alloc >, std::basic_stringstream< CharT, Traits, Alloc >, std::basic_istream< char, Traits >, std::basic_istream< char >, std::basic_iostream< char >, std::basic_ostream< char, Traits >, and std::basic_ostream< char >. Definition at line 68 of file basic_ios.h. |
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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 in std::basic_ifstream< CharT, Traits >, std::basic_ofstream< CharT, Traits >, std::basic_fstream< CharT, Traits >, std::basic_istream< CharT, Traits >, std::basic_iostream< CharT, Traits >, std::basic_ostream< CharT, Traits >, std::basic_istringstream< CharT, Traits, Alloc >, std::basic_ostringstream< CharT, Traits, Alloc >, std::basic_stringstream< CharT, Traits, Alloc >, std::basic_istream< char, Traits >, std::basic_istream< char >, std::basic_iostream< char >, std::basic_ostream< char, Traits >, and std::basic_ostream< char >. Definition at line 67 of file basic_ios.h. |
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This is an enumerated type.
Referenced by std::basic_streambuf< CharT, enc_char_traits< CharT > >::pubseekoff(), std::basic_istream< CharT, Traits >::seekg(), std::basic_streambuf< CharT, enc_char_traits< CharT > >::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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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 in std::basic_ifstream< CharT, Traits >, std::basic_ofstream< CharT, Traits >, std::basic_fstream< CharT, Traits >, std::basic_istream< CharT, Traits >, std::basic_iostream< CharT, Traits >, std::basic_ostream< CharT, Traits >, std::basic_istringstream< CharT, Traits, Alloc >, std::basic_ostringstream< CharT, Traits, Alloc >, std::basic_stringstream< CharT, Traits, Alloc >, std::basic_istream< char, Traits >, std::basic_istream< char >, std::basic_iostream< char >, std::basic_ostream< char, Traits >, and std::basic_ostream< char >. Definition at line 69 of file basic_ios.h. |
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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 377 of file ios_base.h. |
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Constructor performs initialization. The parameter is passed by derived streams. Definition at line 256 of file basic_ios.h. |
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Empty. The destructor does nothing. More specifically, it does not destroy the streambuf held by rdbuf(). Definition at line 268 of file basic_ios.h. |
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Empty. The default constructor does nothing and is not normally accessible to users. Definition at line 444 of file basic_ios.h. |
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Fast error checking.
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[Re]sets the error state.
References std::basic_ios< CharT, Traits >::exceptions(), std::basic_ios< CharT, Traits >::rdbuf(), and std::basic_ios< CharT, Traits >::rdstate(). Referenced by std::basic_ios< char, Traits >::exceptions(), std::basic_ios< CharT, Traits >::rdbuf(), and std::basic_ios< char, Traits >::setstate(). |
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Copies fields of __rhs into this.
References std::basic_ios< CharT, Traits >::exceptions(), std::basic_ios< CharT, Traits >::fill(), std::ios_base::flags(), std::ios_base::getloc(), std::ios_base::precision(), std::basic_ios< CharT, Traits >::tie(), and std::ios_base::width(). |
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Fast error checking.
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Throwing exceptions on errors.
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); } |
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Throwing exceptions on errors.
Referenced by std::basic_ios< CharT, Traits >::clear(), and std::basic_ios< CharT, Traits >::copyfmt(). |
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Fast error checking.
Referenced by std::basic_ios< char, Traits >::operator void *(), std::basic_ios< char, Traits >::operator!(), std::basic_istream< CharT, Traits >::seekg(), std::basic_ostream< CharT, Traits >::seekp(), std::basic_istream< CharT, Traits >::tellg(), and std::basic_ostream< CharT, Traits >::tellp(). |
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Sets a new "empty" character.
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Retreives the "empty" character.
Referenced by std::basic_ios< CharT, Traits >::copyfmt(), std::basic_ios< char, Traits >::fill(), and std::basic_ostream< CharT, Traits >::operator<<(). |
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Setting new format flags all at once.
References std::ios_base::fmtflags. |
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Access to format flags.
Referenced by 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(). |
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Locale access.
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 649 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(). |
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Fast error checking.
Referenced by std::basic_ostream< CharT, Traits >::sentry::sentry(), and std::basic_istream< CharT, Traits >::sentry::sentry(). |
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Moves to a new locale.
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. Definition at line 127 of file basic_ios.tcc. References std::basic_ios< CharT, Traits >::rdbuf(). Referenced by std::operator<<(). |
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All setup is performed here. This is called from the public constructor. It is not virtual and cannot be redefined. Definition at line 139 of file basic_ios.tcc. Referenced by std::basic_fstream< CharT, Traits >::basic_fstream(), std::basic_ifstream< CharT, Traits >::basic_ifstream(), std::basic_ios< char, Traits >::basic_ios(), std::basic_iostream< char >::basic_iostream(), std::basic_istream< char >::basic_istream(), std::basic_istringstream< CharT, Traits, Alloc >::basic_istringstream(), std::basic_ofstream< CharT, Traits >::basic_ofstream(), std::basic_ostream< char >::basic_ostream(), std::basic_ostringstream< CharT, Traits, Alloc >::basic_ostringstream(), and std::basic_stringstream< CharT, Traits, Alloc >::basic_stringstream(). |
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Access to integer array.
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 693 of file ios_base.h. |
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Locale access.
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Squeezes characters.
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 Definition at line 116 of file basic_ios.tcc. References std::basic_ios< CharT, Traits >::char_type. |
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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. |
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The quick-and-easy status check. This allows you to write constructs such as "if (!a_stream) ..." and "while (a_stream) ..." Definition at line 111 of file basic_ios.h. |
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Changing flags.
References std::streamsize. |
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Flags access.
Referenced by std::basic_ios< CharT, Traits >::copyfmt(), and std::operator<<(). |
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Access to void pointer array.
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 714 of file ios_base.h. |
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Changing the underlying buffer.
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
std::fstream foo; // or some other derived type std::streambuf* p = .....; foo.ios::rdbuf(p); // ios == basic_ios<char> References std::basic_ios< CharT, Traits >::clear(). |
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Returns the error state of the stream buffer.
Referenced by std::basic_ios< char, Traits >::bad(), std::basic_ios< CharT, Traits >::clear(), std::basic_ios< char, Traits >::eof(), std::basic_ios< char, Traits >::fail(), and std::basic_ios< char, Traits >::good(). |
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Add the callback __fn with parameter index.
References std::ios_base::event_callback. |
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Setting new format flags.
& mask. An example mask is ios_base::adjustfield . Definition at line 550 of file ios_base.h.
References std::ios_base::fmtflags. |
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Setting new format flags.
References std::ios_base::fmtflags. Referenced by std::boolalpha(), std::dec(), std::fixed(), std::hex(), std::internal(), std::left(), std::oct(), std::right(), std::scientific(), std::showbase(), std::showpoint(), std::showpos(), std::skipws(), std::unitbuf(), and std::uppercase(). |
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Interaction with the standard C I/O objects.
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Ties this stream to an output stream.
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Fetches the current tied stream.
std::cin is tied to std::cout . Definition at line 281 of file basic_ios.h.
Referenced by std::basic_ios< CharT, Traits >::copyfmt(), std::basic_ostream< CharT, Traits >::sentry::sentry(), and std::basic_istream< CharT, Traits >::sentry::sentry(). |
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Clearing format flags.
References std::ios_base::fmtflags. Referenced by std::noboolalpha(), std::noshowbase(), std::noshowpoint(), std::noshowpos(), std::noskipws(), std::nounitbuf(), and std::nouppercase(). |
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Widens characters.
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 Definition at line 121 of file basic_ios.tcc. Referenced by std::endl(), std::basic_ios< char, Traits >::fill(), std::getline(), and std::operator>>(). |
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Changing flags.
References std::streamsize. |
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Flags access.
Referenced by std::basic_ios< CharT, Traits >::copyfmt(), std::num_put< CharT, OutIter >::do_put(), and std::operator>>(). |
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Access to unique indices.
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 138 of file ios.cc. |
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A mask of left|right|internal. Useful for the 2-arg form of |
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Seek to end before each write. |
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Open and seek to end immediately after opening. |
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Indicates a loss of integrity in an input or output sequence (such as an irrecoverable read error from a file). |
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A mask of dec|oct|hex. Useful for the 2-arg form of |
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Request a seek relative to the beginning of the stream. |
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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. |
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Insert/extract |
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Request a seek relative to the current position within the sequence. |
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Converts integer input or generates integer output in decimal base. |
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Request a seek relative to the current end of the sequence. |
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Indicates that an input operation reached the end of an input sequence. |
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Indicates that an input operation failed to read the expected characters, or that an output operation failed to generate the desired characters. |
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Generate floating-point output in fixed-point notation. |
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A mask of scientific|fixed. Useful for the 2-arg form of |
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Indicates all is well. |
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Converts integer input or generates integer output in hexadecimal base. |
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Open for input. Default for |
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Adds fill characters at a designated internal point in certain generated output, or identical to |
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Adds fill characters on the right (final positions) of certain generated output. (I.e., the thing you print is flush left.). |
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Converts integer input or generates integer output in octal base. |
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Open for output. Default for |
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Adds fill characters on the left (initial positions) of certain generated output. (I.e., the thing you print is flush right.). |
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Generates floating-point output in scientific notation. |
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Generates a prefix indicating the numeric base of generated integer output. |
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Generates a decimal-point character unconditionally in generated floating-point output. |
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Generates a + sign in non-negative generated numeric output. |
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Skips leading white space before certain input operations. |
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Open for input. Default for |
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Flushes output after each output operation. |
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Replaces certain lowercase letters with their uppercase equivalents in generated output. |