Espaços nominais
Variantes
Acções

std::codecvt_utf16

Da cppreference.com
< cpp‎ | locale

 
 
Biblioteca localizações
Localidades e facetas
Original:
Locales and facets
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
locale
Classificação de caracteres
Original:
Character classification
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Conversões
Original:
Conversions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Facet classes base da categoria
Original:
Facet category base classes
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Categorias faceta
Original:
Facet categories
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Específicos da localidade facetas
Original:
Locale-specific facets
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Facetas de conversão de código
Original:
Code conversion facets
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
codecvt_utf8(C++11)
codecvt_utf16(C++11)
C localidade
Original:
C locale
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
 
Defined in header <codecvt>
template< class Elem,

          unsigned long Maxcode = 0x10ffff,
          std::codecvt_mode Mode = (std::codecvt_mode)0 >

class codecvt_utf16 : public std::codecvt<Elem, char, std::mbstate_t>;;
std::codecvt_utf16 é uma faceta std::codecvt que encapsula a conversão entre um byte string UTF-16 codificado e UCS2 ou UCS4 cadeia de caracteres (dependendo do tipo de Elem). Esta faceta codecvt pode ser usado para ler e escrever UTF-16 arquivos em modo binário.
Original:
std::codecvt_utf16 is a std::codecvt facet which encapsulates conversion between a UTF-16 encoded byte string and UCS2 or UCS4 character string (depending on the type of Elem). This codecvt facet can be used to read and write UTF-16 files in binary mode.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Índice

[editar] Parâmetros do modelo

Elem -
ou char16_t, char32_t, wchar_t ou
Original:
either char16_t, char32_t, or wchar_t
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Maxcode -
o maior valor de Elem que esta faceta irá ler ou escrever sem erro
Original:
the largest value of Elem that this facet will read or write without error
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Mode -
uma constante de std::codecvt_mode tipo
Original:
a constant of type std::codecvt_mode
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Inherited from std::codecvt

Member types

Tipo de membro
Original:
Member type
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Definition
intern_type internT
extern_type externT
state_type stateT

Member objects

Nome do membro
Original:
Member name
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Type
id (estática) std::locale::id

Member functions

Invoca do_out
Original:
invokes do_out
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(of std::codecvt função pública membro) [edit]
Invoca do_in
Original:
invokes do_in
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(of std::codecvt função pública membro) [edit]
Invoca do_unshift
Original:
invokes do_unshift
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(of std::codecvt função pública membro) [edit]
Invoca do_encoding
Original:
invokes do_encoding
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(of std::codecvt função pública membro) [edit]
Invoca do_always_noconv
Original:
invokes do_always_noconv
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(of std::codecvt função pública membro) [edit]
Invoca do_length
Original:
invokes do_length
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(of std::codecvt função pública membro) [edit]
Invoca do_max_length
Original:
invokes do_max_length
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(of std::codecvt função pública membro) [edit]

Protected member functions

[virtual]
Converte uma cadeia de internt para externT, como ao escrever para o arquivo
Original:
converts a string from internT to externT, such as when writing to file
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(virtual protegido of std::codecvt função de membro) [edit]
[virtual]
Converte uma cadeia de externT a Internt, como quando lendo de um arquivo
Original:
converts a string from externT to internT, such as when reading from file
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(virtual protegido of std::codecvt função de membro) [edit]
[virtual]
gera a seqüência de caracteres de terminação de caracteres externT para conversão incompleta
Original:
generates the termination character sequence of externT characters for incomplete conversion
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(virtual protegido of std::codecvt função de membro) [edit]
[virtual]
retorna o número de caracteres externT necessários para produzir um caráter internt, se constante
Original:
returns the number of externT characters necessary to produce one internT character, if constant
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(virtual protegido of std::codecvt função de membro) [edit]
Testes se a faceta codifica uma conversão de identidade para todos os valores de argumentos válidos
Original:
tests if the facet encodes an identity conversion for all valid argument values
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(virtual protegido of std::codecvt função de membro) [edit]
[virtual]
calcula o comprimento da corda externT que seria consumida por conversão em tampão internt dado
Original:
calculates the length of the externT string that would be consumed by conversion into given internT buffer
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(virtual protegido of std::codecvt função de membro) [edit]
devolve o número máximo de caracteres externT que poderia ser convertido em um único caractere internt
Original:
returns the maximum number of externT characters that could be converted into a single internT character
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(virtual protegido of std::codecvt função de membro) [edit]


Inherited from std::codecvt_base

Tipo de membro
Original:
Member type
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Definition
enum result { ok, partial, error, noconv };
Tipo de enumeração sem escopo
Original:
Unscoped enumeration type
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Enumeração constante
Original:
Enumeration constant
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
Definition
ok
conversão foi completado sem qualquer erro
Original:
conversion was completed with no error
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
partial
nem todos os caracteres de fonte foram convertidos
Original:
not all source characters were converted
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
error
encontrou um caractere inválido
Original:
encountered an invalid character
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
noconv
necessária nenhuma conversão de entrada, e os tipos de saída são os mesmos
Original:
no conversion required, input and output types are the same
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[editar] Exemplo

O exemplo a seguir demonstra a decodificação de UTF-16LE arquivo em um sistema de 32-bit wchar_t. Em um sistema com 16 bits wchar_t, a decodificação do terceiro personagem irá falhar porque std::codecvt_utf16<char16_t> produz UCS2 não, UTF-16 .
Original:
The following example demonstrates decoding of UTF-16le file on a system with 32-bit wchar_t. On a system with 16-bit wchar_t, decoding of the third character will fail because std::codecvt_utf16<char16_t> produces UCS2, not UTF-16.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

#include <fstream>
#include <iostream>
#include <string>
#include <locale>
#include <codecvt>
void prepare_file()
{
    // UTF-16le data (if host system is little-endian)
    char16_t utf16le[4] ={0x007a,          // latin small letter 'z' U+007a
                          0x6c34,          // CJK ideograph "water"  U+6c34
                          0xd834, 0xdd0b}; // musical sign segno U+1d10b
    // store in a file
    std::ofstream fout("text.txt");
    fout.write( reinterpret_cast<char*>(utf16le), sizeof utf16le);
}
int main()
{
    prepare_file();
    // open as a byte stream
    std::wifstream fin("text.txt", std::ios::binary);
    // apply facet
    fin.imbue(std::locale(fin.getloc(),
       new std::codecvt_utf16<wchar_t, 0x10ffff, std::little_endian>));
 
    for(wchar_t c; fin.get(c); )
            std::cout << std::showbase << std::hex << c << '\n';
}

Output:

0x7a
0x6c34
0x1d10b

[editar] Veja também

Character
conversions
narrow multibyte
(char)
UTF-8
(char)
UTF-16
(char16_t)
UTF-16 mbrtoc16 / c16rtomb codecvt<char16_t, char, mbstate_t>
codecvt_utf8_utf16<char16_t>
codecvt_utf8_utf16<char32_t>
codecvt_utf8_utf16<wchar_t>
N/A
UCS2 No codecvt_utf8<char16_t> codecvt_utf16<char16_t>
UTF-32/UCS4
(char32_t)
mbrtoc32 / c32rtomb codecvt<char32_t, char, mbstate_t>
codecvt_utf8<char32_t>
codecvt_utf16<char32_t>
UCS2/UCS4
(wchar_t)
No codecvt_utf8<wchar_t> codecvt_utf16<wchar_t>
wide
(wchar_t)
codecvt<wchar_t, char, mbstate_t>
mbsrtowcs / wcsrtombs
No No
Converte entre codificações de caracteres, incluindo UTF-8, UTF-16, UTF-32
Original:
converts between character encodings, including UTF-8, UTF-16, UTF-32
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(modelo de classe) [edit]
etiquetas para alterar o comportamento das facetas codecvt padrão
Original:
tags to alter behavior of the standard codecvt facets
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(classe) [edit]
converte entre UTF-8 e UCS2/UCS4
Original:
converts between UTF-8 and UCS2/UCS4
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

(modelo de classe) [edit]
converts between UTF-8 and UTF-16
(modelo de classe) [edit]