Espacios de nombres
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std::basic_filebuf::open

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< cpp‎ | io‎ | basic filebuf

 
 
Entrada / salida de la biblioteca
I / O manipuladores
C-estilo I / O
Buffers
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(obsoleto)
Arroyos
Original:
Streams
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Abstracciones
Original:
Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File I / O
Original:
File I/O
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basic_ifstream
basic_ofstream
basic_fstream
Cadena de I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Matriz I / O
Original:
Array I/O
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istrstream(obsoleto)
ostrstream(obsoleto)
strstream(obsoleto)
Tipos
Original:
Types
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streamoff
streamsize
fpos
Error interfaz categoría
Original:
Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
std::basic_filebuf
Las funciones públicas miembros
Original:
Public member functions
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basic_filebuf::basic_filebuf
basic_filebuf::~basic_filebuf
basic_filebuf::operator=(C++11)
basic_filebuf::swap(C++11)
basic_filebuf::is_open
basic_filebuf::open
basic_filebuf::close
Protegido funciones miembro
Original:
Protected member functions
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basic_filebuf::showmanyc
basic_filebuf::underflow
basic_filebuf::uflow
basic_filebuf::pbackfail
basic_filebuf::overflow
basic_filebuf::setbuf
basic_filebuf::seekoff
basic_filebuf::seekpos
basic_filebuf::sync
basic_filebuf::imbue
Terceros funciones
Original:
Non-member functions
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swap(std::basic_filebuf)(C++11)
 
std::basic_filebuf<CharT, Traits>* open( const char* s, std::ios_base::openmode mode )
(1)
std::basic_filebuf<CharT, Traits>* open( const std::string& s, std::ios_base::openmode mode )
(2) (desde C++11)
Abre el archivo cuyo nombre está dado por
Original:
Opens the file whose name is given by
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1)
el byte de terminación nula estrecho s cadena
Original:
the null-terminated narrow byte string s
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2)
el byte de terminación nula estrecho s.c_str() cadena
Original:
the null-terminated narrow byte string s.c_str()
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como si se aplicase std::fopen(s, modestring), donde modestring se determina como sigue:
Original:
as if by calling std::fopen(s, modestring), where modestring is determined as follows:
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modestring
Original:
modestring
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openmode & ~ate
"r" in
"w" out, out|trunc
"a" app, out|app
"r+" out|in
"w+" out|in|trunc
"a+" out|in|app, in|app
"rb" binary|in
"wb" binary|out, binary|out|trunc
"ab" binary|app, binary|out|app
"r+b" binary|out|in
"w+b" binary|out|in|trunc
"a+b" binary|out|in|app, binary|in|app
Si openmode no es uno de los modos de la lista, el open() falla .
Original:
If openmode is not one of the modes listed, the open() fails.
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Si la operación tiene éxito y openmode & std::ios_base::ate != 0 abierto (el bit se establece ate), vuelve a colocar la posición del archivo al final del archivo, como si se aplicase std::fseek(file, 0, SEEK_END). Si el reposicionamiento de falla, llama close() y devuelve un puntero nulo para indicar el fallo .
Original:
If the open operation succeeds and openmode & std::ios_base::ate != 0 (the ate bit is set), repositions the file position to the end of file, as if by calling std::fseek(file, 0, SEEK_END). If the repositioning fails, calls close() and returns a null pointer to indicate failure.
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Si el archivo asociado ya estaba abierta, devuelve un puntero nulo en seguida .
Original:
If the associated file was already open, returns a null pointer right away.
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Contenido

[editar] Parámetros

s -
el nombre del archivo para abrirlo
Original:
the file name to open
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openmode -
el modo de apertura de archivo, un binario o de los modos de std::ios_base
Original:
the file opening mode, a binary OR of the std::ios_base modes
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[editar] Valor de retorno

*this en caso de éxito, un puntero nulo en caso de fallo .
Original:
*this on success, a null pointer on failure.
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[editar] Notas

open() se suele llamar a través del constructor o la función miembro open() de std::basic_fstream .
Original:
open() is typically called through the constructor or the open() member function of std::basic_fstream.
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[editar] Ejemplo

[editar] Ver también

checks if the associated file is open
(miembro público función) [edit]
vacía el búfer área de poner y cierra el archivo asociado
Original:
flushes the put area buffer and closes the associated file
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(miembro público función) [edit]