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std::basic_filebuf::underflow

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< cpp‎ | io‎ | basic filebuf
 
 
Entrada / salida de la biblioteca
I / O manipuladores
C-estilo I / O
Buffers
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Buffers
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(obsoleto)
Arroyos
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Streams
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Abstracciones
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Abstractions
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File I / O
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File I/O
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Cadena de I / O
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String I/O
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Matriz I / O
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Array I/O
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(obsoleto)
(obsoleto)
(obsoleto)
Tipos
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Types
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Error interfaz categoría
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Error category interface
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(C++11)
 
std::basic_filebuf
Las funciones públicas miembros
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Public member functions
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Protegido funciones miembro
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Protected member functions
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basic_filebuf::underflow
Terceros funciones
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Non-member functions
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protected:
virtual int_type underflow()
Se comporta como el std::basic_streambuf::underflow clase base, excepto que para leer los datos de la secuencia de caracteres asociado (el archivo) en el área get, primero lee los bytes desde el archivo en una memoria intermedia temporal (asignado tan grande como sea necesario), a continuación, utiliza std::codecvt::in de la configuración regional impregnado para convertir la externa (normalmente, de varios bytes) representación de la forma interna que se utiliza después para rellenar el área get. La conversión puede ser evitado si std::codecvt::always_noconv devuelve la configuración regional de true
Original:
Behaves like the base class std::basic_streambuf::underflow, except that to read the data from the associated character sequence (the file) into the get area, first reads the bytes from the file into a temporary buffer (allocated as large as necessary), then uses std::codecvt::in of the imbued locale to convert the external (typically, multibyte) representation to the internal form which is then used to populate the get area. The conversion may be skipped if the locale's std::codecvt::always_noconv returns true
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Contenido

[editar] Parámetros

(Ninguno)
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(none)
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[editar] Valor de retorno

Traits::to_int_type(*gptr()) (el primer carácter de la secuencia de pendiente) en caso de éxito, o Traits::eof() en caso de fallo .
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Traits::to_int_type(*gptr()) (the first character of the pending sequence) in case of success, or Traits::eof() in case of failure.
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[editar] Ejemplo

[editar] Ver también

[virtual]
lee los caracteres de la secuencia de entrada asociado a la zona de get
Original:
reads characters from the associated input sequence to the get area
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(función miembro virtual protegido de std::basic_streambuf) [editar]
[virtual]
lee desde el archivo asociado y los avances el siguiente puntero en la zona get
Original:
reads from the associated file and advances the next pointer in the get area
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(función miembro virtual protegido) [editar]
[virtual]
escribe caracteres en el fichero de asociados de la zona de venta
Original:
writes characters to the associated file from the put area
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(función miembro virtual protegido) [editar]