Inheritance diagram for std::basic_ofstream< CharT, Traits >:
Public Types | |
typedef CharT | char_type |
typedef Traits | traits_type |
typedef traits_type::int_type | int_type |
typedef traits_type::pos_type | pos_type |
typedef traits_type::off_type | off_type |
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) |
enum | event |
Public Member Functions | |
basic_ofstream () | |
Default constructor. | |
basic_ofstream (const char *s, ios_base::openmode __mode=ios_base::out|ios_base::trunc) | |
Create an output file stream. | |
~basic_ofstream () | |
The destructor does nothing. | |
__filebuf_type * | rdbuf () const |
Accessing the underlying buffer. | |
bool | is_open () |
Wrapper to test for an open file. | |
void | open (const char *s, ios_base::openmode __mode=ios_base::out|ios_base::trunc) |
Opens an external file. | |
void | close () |
Close the file. | |
__ostream_type & | flush () |
Synchronizing the stream buffer. | |
pos_type | tellp () |
Getting the current write position. | |
__ostream_type & | seekp (pos_type) |
Changing the current write position. | |
__ostream_type & | seekp (off_type, ios_base::seekdir) |
Changing the current write position. | |
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_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 (basic_streambuf< CharT, Traits > *sb) |
Changing the underlying buffer. | |
basic_ios & | copyfmt (const basic_ios &__rhs) |
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) |
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) |
void *& | pword (int __ix) |
__ostream_type & | operator<< (__ostream_type &(*__pf)(__ostream_type &)) |
Interface for manipulators. | |
__ostream_type & | operator<< (__ios_type &(*__pf)(__ios_type &)) |
Interface for manipulators. | |
__ostream_type & | operator<< (ios_base &(*__pf)(ios_base &)) |
Interface for manipulators. | |
Arithmetic Inserters | |
All the operator<< functions (aka formatted output functions) have some common behavior. Each starts by constructing a temporary object of type std::basic_ostream::sentry. This can have several effects, concluding with the setting of a status flag; see the sentry documentation for more.If the sentry status is good, the function tries to generate whatever data is appropriate for the type of the argument.
If an exception is thrown during insertion, ios_base::badbit will be turned on in the stream's error state without causing an ios_base::failure to be thrown. The original exception will then be rethrown. | |
__ostream_type & | operator<< (long n) |
Basic arithmetic inserters. | |
__ostream_type & | operator<< (unsigned long n) |
Basic arithmetic inserters. | |
__ostream_type & | operator<< (bool n) |
Basic arithmetic inserters. | |
__ostream_type & | operator<< (short n) |
Basic arithmetic inserters. | |
__ostream_type & | operator<< (unsigned short n) |
Basic arithmetic inserters. | |
__ostream_type & | operator<< (int n) |
Basic arithmetic inserters. | |
__ostream_type & | operator<< (unsigned int n) |
Basic arithmetic inserters. | |
__ostream_type & | operator<< (double __f) |
Basic arithmetic inserters. | |
__ostream_type & | operator<< (float __f) |
Basic arithmetic inserters. | |
__ostream_type & | operator<< (long double __f) |
Basic arithmetic inserters. | |
__ostream_type & | operator<< (const void *__p) |
Basic arithmetic inserters. | |
__ostream_type & | operator<< (streambuf_type *sb) |
Extracting from another streambuf. | |
Unformatted Output Functions | |
All the unformatted output functions have some common behavior. Each starts by constructing a temporary object of type std::basic_ostream::sentry. This has several effects, concluding with the setting of a status flag; see the sentry documentation for more. If the sentry status is good, the function tries to generate whatever data is appropriate for the type of the argument.
If an exception is thrown during insertion, ios_base::badbit will be turned on in the stream's error state. If badbit is on in the stream's exceptions mask, the exception will be rethrown without completing its actions. | |
__ostream_type & | put (char_type c) |
Simple insertion. | |
__ostream_type & | write (const char_type *s, streamsize n) |
Character string insertion. | |
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 () |
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 | |
void | init (basic_streambuf< CharT, Traits > *sb) |
All setup is performed here. |
This class supports reading from named files, using the inherited functions from std::basic_ostream. To control the associated sequence, an instance of std::basic_filebuf is used, which this page refers to as sb
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Definition at line 595 of file fstream.
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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 from std::basic_ostream< CharT, Traits >. |
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Definition at line 355 of file ios_base.h. |
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This is a bitmask type.
Definition at line 212 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 from std::basic_ostream< CharT, Traits >. |
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This is a bitmask type.
Definition at line 269 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 from std::basic_ostream< CharT, Traits >. |
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This is a bitmask type.
Definition at line 296 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 from std::basic_ostream< CharT, Traits >. |
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This is an enumerated type.
Definition at line 323 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 from std::basic_ostream< CharT, Traits >. |
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Definition at line 345 of file ios_base.h. |
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Default constructor.
Initializes Definition at line 626 of file fstream. References std::basic_ios< CharT, Traits >::init(). |
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Create an output file stream.
ios_base::out|ios_base::trunc is automatically included in mode.Tip: When using std::string to hold the filename, you must use .c_str() before passing it to this constructor. Definition at line 642 of file fstream. References std::basic_ios< CharT, Traits >::init(), and std::basic_ofstream< CharT, Traits >::open(). |
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The destructor does nothing. The file is closed by the filebuf object, not the formatting stream. |
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Fast error checking.
Definition at line 199 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 >::exceptions(). 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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Close the file.
Calls Definition at line 703 of file fstream. References std::basic_ios< CharT, Traits >::setstate(). |
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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 178 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 245 of file basic_ios.h. |
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Throwing exceptions on errors.
Definition at line 210 of file basic_ios.h. Referenced by std::basic_ios< CharT, Traits >::clear(), and std::basic_ios< CharT, Traits >::copyfmt(). |
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Fast error checking.
Definition at line 189 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 362 of file basic_ios.h. |
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Retreives the "empty" character.
Definition at line 342 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 482 of file ios_base.h. |
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Access to format flags.
Definition at line 472 of file ios_base.h. Referenced by std::basic_ios< CharT, Traits >::copyfmt(), std::basic_ostream< CharT, Traits >::operator<<(), and std::basic_ostream< char >::operator<<(). |
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Synchronizing the stream buffer.
rdbuf() is a null pointer, changes nothing.
Otherwise, calls Definition at line 392 of file ostream.tcc. References std::basic_ios< CharT, Traits >::rdbuf(), and std::basic_ios< CharT, Traits >::setstate(). Referenced by std::flush(). |
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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 614 of file ios_base.h. |
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Fast error checking.
Definition at line 168 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 139 of file basic_ios.tcc. References std::basic_streambuf< CharT, Traits >::pubimbue(), and std::basic_ios< CharT, Traits >::rdbuf(). |
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All setup is performed here. This is called from the public constructor. It is not virtual and cannot be redefined. The second argument, cache, is used to initialize the standard streams without allocating memory. Definition at line 151 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_istream< char >::basic_istream(), std::basic_ofstream< CharT, Traits >::basic_ofstream(), and std::basic_ostream< char >::basic_ostream(). |
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Wrapper to test for an open file.
Definition at line 675 of file fstream. References std::basic_filebuf< CharT, Traits >::is_open(). |
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Definition at line 637 of file ios_base.h. |
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Locale access.
Definition at line 624 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 118 of file basic_ios.tcc. |
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Opens an external file.
std::basic_filebuf::open (s,mode|out|trunc). If that function fails, failbit is set in the stream's error state.Tip: When using std::string to hold the filename, you must use .c_str() before passing it to this constructor. Definition at line 689 of file fstream. References std::basic_ios< CharT, Traits >::setstate(). Referenced by std::basic_ofstream< CharT, Traits >::basic_ofstream(). |
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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 109 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 113 of file basic_ios.h. |
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Extracting from another streambuf.
If sb is NULL, the stream will set failbit in its error state.
Characters are extracted from sb and inserted into
If the function inserts no characters, failbit is set. Definition at line 312 of file ostream.tcc. References std::basic_ios< CharT, Traits >::setstate(). |
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Basic arithmetic inserters.
num_get facet) to perform numeric formatting.
Definition at line 288 of file ostream.tcc. References std::basic_ios< CharT, Traits >::setstate(). |
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Basic arithmetic inserters.
num_get facet) to perform numeric formatting.
Definition at line 264 of file ostream.tcc. References std::basic_ios< CharT, Traits >::setstate(). |
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Basic arithmetic inserters.
num_get facet) to perform numeric formatting.
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Basic arithmetic inserters.
num_get facet) to perform numeric formatting.
Definition at line 240 of file ostream.tcc. References std::basic_ios< CharT, Traits >::setstate(). |
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Basic arithmetic inserters.
num_get facet) to perform numeric formatting.
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Basic arithmetic inserters.
num_get facet) to perform numeric formatting.
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Basic arithmetic inserters.
num_get facet) to perform numeric formatting.
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Basic arithmetic inserters.
num_get facet) to perform numeric formatting.
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Basic arithmetic inserters.
num_get facet) to perform numeric formatting.
Definition at line 97 of file ostream.tcc. References std::basic_ios< CharT, Traits >::setstate(). |
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Basic arithmetic inserters.
num_get facet) to perform numeric formatting.
Definition at line 155 of file ostream.tcc. References std::basic_ios< CharT, Traits >::setstate(). |
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Basic arithmetic inserters.
num_get facet) to perform numeric formatting.
Definition at line 121 of file ostream.tcc. References std::basic_ios< CharT, Traits >::fill(), std::ios_base::flags(), and std::basic_ios< CharT, Traits >::setstate(). |
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Interface for manipulators.
Manuipulators such as Definition at line 85 of file ostream.tcc. |
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Interface for manipulators.
Manuipulators such as Definition at line 73 of file ostream.tcc. |
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Interface for manipulators.
Manuipulators such as Definition at line 62 of file ostream.tcc. |
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Changing flags.
Definition at line 550 of file ios_base.h. |
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Flags access.
Definition at line 542 of file ios_base.h. Referenced by std::basic_ios< CharT, Traits >::copyfmt(). |
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Simple insertion.
Definition at line 335 of file ostream.tcc. References std::basic_ios< CharT, Traits >::rdbuf(), and std::basic_ios< CharT, Traits >::setstate(). Referenced by std::ends(). |
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Definition at line 648 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 Definition at line 51 of file basic_ios.tcc. References std::basic_ios< CharT, Traits >::clear(). |
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Accessing the underlying buffer.
Reimplemented from std::basic_ios< CharT, Traits >. |
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Returns the error state of the stream buffer.
Definition at line 125 of file basic_ios.h. Referenced by std::basic_ios< char, Traits >::good(). |
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Changing the current write position.
fail() is not true, calls rdbuf()->pubseekoff(off,dir) . If that function fails, sets failbit.
Definition at line 454 of file ostream.tcc. References std::basic_ios< CharT, Traits >::rdbuf(), and std::basic_ios< CharT, Traits >::setstate(). |
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Changing the current write position.
fail() is not true, calls rdbuf()->pubseekpos(pos) . If that function fails, sets failbit.
Definition at line 428 of file ostream.tcc. References std::basic_ios< CharT, Traits >::rdbuf(), and std::basic_ios< CharT, Traits >::setstate(). |
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Setting new format flags.
& mask. An example mask is ios_base::adjustfield .
Definition at line 515 of file ios_base.h. |
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Setting new format flags.
Definition at line 498 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.
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Getting the current write position.
fail() is not false, returns pos_type (-1) to indicate failure. Otherwise returns rdbuf()->pubseekoff(0,cur,out) .
Definition at line 412 of file ostream.tcc. References std::basic_ios< CharT, Traits >::rdbuf(). |
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Ties this stream to an output stream.
Definition at line 294 of file basic_ios.h. |
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Fetches the current tied stream.
std::cin is tied to std::cout .
Definition at line 282 of file basic_ios.h. Referenced by std::basic_ios< CharT, Traits >::copyfmt(). |
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Clearing format flags.
Definition at line 530 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 128 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 572 of file ios_base.h. |
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Flags access.
Definition at line 564 of file ios_base.h. Referenced by std::basic_ios< CharT, Traits >::copyfmt(), and std::operator<<(). |
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Character string insertion.
Referenced by std::operator<<(). |
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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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