Espacios de nombres
Variantes
Acciones

std::codecvt_utf16

De cppreference.com
< cpp‎ | locale

 
 
Localizaciones biblioteca
Locales y 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
Carácter clasificación
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.
Conversiones
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 clases categoría base
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.
Categorías 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.
Específico de la localidad 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 código de conversión
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 locale
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 es una faceta std::codecvt que encapsula la conversión entre una cadena de bytes UTF-16 codificado y UCS2 o UCS4 cadena de caracteres (en función del tipo de Elem). Esta faceta codecvt se puede utilizar para leer y escribir archivos UTF-16 en modo binario .
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.

Contenido

[editar] Parámetros de plantilla

Elem -
ya sea char16_t, char32_t, o wchar_t
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 -
el valor más grande de Elem que esta faceta se leer o escribir sin error
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 -
una 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

Miembro de tipo
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

Persona
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 (estático) 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.

(miembro público of std::codecvt función) [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.

(miembro público of std::codecvt función) [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.

(miembro público of std::codecvt función) [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.

(miembro público of std::codecvt función) [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.

(miembro público of std::codecvt función) [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.

(miembro público of std::codecvt función) [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.

(miembro público of std::codecvt función) [edit]

Protected member functions

[virtual]
convierte una cadena de internt a externT, tales como cuando se escribe en el archivo
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.

(virtuales protegidos of std::codecvt miembro de función) [edit]
[virtual]
convierte una cadena de externT a internt, como cuando al leer el archivo
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.

(virtuales protegidos of std::codecvt miembro de función) [edit]
[virtual]
genera la secuencia de caracteres de terminación de caracteres externT para la conversión 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.

(virtuales protegidos of std::codecvt miembro de función) [edit]
[virtual]
devuelve el número de caracteres externT necesarias para producir un carácter internt, si es 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.

(virtuales protegidos of std::codecvt miembro de función) [edit]
Comprueba si la faceta codifica una conversión de identidad para todos los valores de los 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.

(virtuales protegidos of std::codecvt miembro de función) [edit]
[virtual]
calcula la longitud de la cadena externT que sería consumida por conversión en tampón 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.

(virtuales protegidos of std::codecvt miembro de función) [edit]
devuelve el número máximo de caracteres externT que se podrían transformar en un único carácter 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.

(virtuales protegidos of std::codecvt miembro de función) [edit]


Inherited from std::codecvt_base

Miembro de tipo
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 enumeración sin ámbito
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.
Enumeración 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
conversión se completó con ningún error
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
no todos los caracteres de código se convirtieron
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
encontró un carácter no válido
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
sin necesidad de conversión, tipos de entrada y salida son los mismos
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] Ejemplo

El siguiente ejemplo muestra la decodificación de archivos UTF-16LE en un sistema de 32-bit wchar_t. En un sistema con 16-bit wchar_t, decodificación del tercer personaje fallará porque std::codecvt_utf16<char16_t> produce UCS2 no, 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] Ver también

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
Convierte entre codificaciones de caracteres, incluyendo 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.

(clase de plantilla) [edit]
etiquetas para alterar el comportamiento de las facetas codecvt estándar
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.

(clase) [edit]
la conversión entre UTF-8 y 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.

(clase de plantilla) [edit]
converts between UTF-8 and UTF-16
(clase de plantilla) [edit]