#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 | |
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 |
Adds fill characters at a designated internal point in certain generated output, or identical to right if no such point is designated. | |
static const fmtflags | left |
Adds fill characters on the right (final positions) of certain 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 |
Adds fill characters on the left (initial positions) of certain 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 |
Generates a prefix indicating the numeric base of generated integer output. | |
static const fmtflags | showpoint |
Generates a decimal-point character unconditionally in generated 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 |
Replaces certain lowercase letters with their uppercase equivalents 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 |
Indicates a loss of integrity in an input or output sequence (such 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 |
Indicates that an input operation failed to read the expected characters, or that an output operation failed to generate the 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 |
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. | |
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 | |
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. |
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The type of an event callback function.
Definition at line 437 of file ios_base.h. |
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This is a bitmask type.
Definition at line 253 of file ios_base.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 66 of file basic_ios.h. |
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This is a bitmask type.
Definition at line 328 of file ios_base.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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This is a bitmask type.
Definition at line 359 of file ios_base.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.
Definition at line 392 of file ios_base.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 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 420 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.
Definition at line 197 of file basic_ios.h. |
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[Re]sets the error state.
Definition at line 39 of file basic_ios.tcc. References 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.
Definition at line 61 of file basic_ios.tcc. References std::basic_ios< CharT, Traits >::exceptions(), std::basic_ios< CharT, Traits >::fill(), std::ios_base::flags(), std::basic_streambuf< CharT, Traits >::getloc(), std::ios_base::precision(), std::basic_ios< CharT, Traits >::tie(), and std::ios_base::width(). |
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Fast error checking.
Definition at line 176 of file basic_ios.h. |
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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); } Definition at line 243 of file basic_ios.h. |
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Throwing exceptions on errors.
Definition at line 208 of file basic_ios.h. Referenced by std::basic_ios< CharT, Traits >::copyfmt(). |
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Fast error checking.
Definition at line 187 of file basic_ios.h. Referenced by std::basic_ios< char, Traits >::operator void *(), and std::basic_ios< char, Traits >::operator!(). |
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Sets a new "empty" character.
Definition at line 376 of file basic_ios.h. |
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Retreives the "empty" character.
Definition at line 356 of file basic_ios.h. Referenced by std::basic_ios< CharT, Traits >::copyfmt(), std::basic_ios< char, Traits >::fill(), std::operator<<(), and std::basic_ostream< CharT, Traits >::operator<<(). |
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Setting new format flags all at once.
Definition at line 560 of file ios_base.h. |
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Access to format flags.
Definition at line 550 of file ios_base.h. Referenced by std::basic_ios< CharT, Traits >::copyfmt(), std::basic_ostream< CharT, Traits >::operator<<(), std::basic_ostream< char >::operator<<(), and std::operator<<(). |
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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 692 of file ios_base.h. |
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Fast error checking.
Definition at line 166 of file basic_ios.h. |
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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_ios< char, Traits >::basic_ios(), std::basic_iostream< char >::basic_iostream(), std::basic_istream< char >::basic_istream(), and std::basic_ostream< char >::basic_ostream(). |
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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 736 of file ios_base.h. |
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Locale access.
Definition at line 702 of file ios_base.h. |
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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. |
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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.
Definition at line 628 of file ios_base.h. |
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Flags access.
Definition at line 620 of file ios_base.h. 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 757 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> Definition at line 51 of file basic_ios.tcc. References std::basic_ios< CharT, Traits >::clear(). |
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Returns the error state of the stream buffer.
Definition at line 123 of file basic_ios.h. Referenced by std::basic_ios< CharT, Traits >::clear(), and std::basic_ios< char, Traits >::good(). |
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Add the callback __fn with parameter index.
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Setting new format flags.
& mask. An example mask is ios_base::adjustfield .
Definition at line 593 of file ios_base.h. |
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Setting new format flags.
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::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.
Definition at line 148 of file ios_init.cc. References std::cerr, std::cin, std::clog, std::cout, and std::basic_ios< CharT, Traits >::rdbuf(). |
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Ties this stream to an output stream.
Definition at line 293 of file basic_ios.h. |
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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(). |
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Clearing 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(). |
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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::basic_ios< char, Traits >::fill(), and std::operator<<(). |
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Changing flags.
Definition at line 650 of file ios_base.h. |
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Flags access.
Definition at line 642 of file ios_base.h. Referenced by std::basic_ios< CharT, Traits >::copyfmt(), 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. |
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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.
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