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std::basic_filebuf::seekpos

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< cpp‎ | io‎ | basic filebuf

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C++
 
De entrada / saída da biblioteca
I / O manipuladores
C estilo de I / O
Buffers
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Buffers
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(obsoleta)
Streams
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Streams
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Abstrações
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Abstractions
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File I / O
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File I/O
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Cordas I / O
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String I/O
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Matriz de I / O
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Array I/O
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(obsoleta)
(obsoleta)
(obsoleta)
Tipos
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Types
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Interface de categoria de erro
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Error category interface
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(C++11)
(C++11)
 
std::basic_filebuf
Membro funções públicas
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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 funções de membro
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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
Não-membros funções
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Non-member functions
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(C++11)
 
protected:

virtual pos_type seekpos( pos_type sp,

                          std::ios_base::openmode which = std::ios_base::in | std::ios_base::out );
Reposiciona o ponteiro de arquivo, se possível, para a posição indicada pelo sp.
Original:
Repositions the file pointer, if possible, to the position indicated by sp.
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Se o arquivo associado não está aberto (is_open()==false), não imediatamente.
Original:
If the associated file is not open (is_open()==false), fails immediately.
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Se o arquivo é aberto para escrita, primeiro escreve a área de largada e as seqüências unshift exigidos pelo local atualmente imbuído, usando overflow()
Original:
If the file is open for writing, first writes the put area and any unshift sequences required by the currently imbued locale, using overflow()
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Em seguida, reposiciona o ponteiro do arquivo, como chamando std::fseek
Original:
Then repositions the file pointer, as by calling std::fseek
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Se o arquivo é aberto para leitura, atualiza a obter área, se necessário.
Original:
If the file is open for reading, updates the get area if necessary.
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Se sp não foi obtida pelo telefone seekoff() ou seekpos() no mesmo arquivo, o comportamento é indefinido.
Original:
If sp was not obtained by calling seekoff() or seekpos() on the same file, the behavior is undefined.
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Índice

[editar] Parâmetros

sp -
posição do arquivo obtido por seekoff() ou seekpos() chamado mais cedo no mesmo arquivo
Original:
file position obtained by seekoff() or seekpos() called earlier on the same file
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which -
define quais das entradas e / ou as sequências de saída para afectar. Ele pode ser um ou uma combinação das seguintes constantes:
Constante
Original:
Constant
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 Explanation
in
afetar a seqüência de entrada
Original:
affect the input sequence
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out
afetar a seqüência de saída
Original:
affect the output sequence
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Original:
defines which of the input and/or output sequences to affect. It can be one or a combination of the following constants:
Constante
Original:
Constant
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 Explanation
in
afetar a seqüência de entrada
Original:
affect the input sequence
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out
afetar a seqüência de saída
Original:
affect the output sequence
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[editar] Valor de retorno

sp em sucesso ou em caso de falha pos_type(off_type(-1)).
Original:
sp on success or pos_type(off_type(-1)) on failure.
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[editar] Notas

seekpos() é chamado por std::basic_streambuf::pubseekpos, que é chamado pelas versões argumento único de std::basic_istream::seekg e std::basic_ostream::seekp
Original:
seekpos() is called by std::basic_streambuf::pubseekpos, which is called by the single-argument versions of std::basic_istream::seekg and std::basic_ostream::seekp
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[editar] Exemplo

Esta seção está incompleta
Motivo: sem exemplo

[editar] Veja também
Invoca seekpos()
Original:
invokes seekpos()
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(of std::basic_streambuf função pública membro) [edit]
[virtual]
reposiciona a posição do arquivo, usando endereçamento relativo
Original:
repositions the file position, using relative addressing
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(virtual protegido função de membro) [edit]
move o indicador de posição de arquivo para um local específico em um arquivo
Original:
moves the file position indicator to a specific location in a file
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(função) [edit]
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