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    std::codecvt_byname

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    <metanoindex/>

     
    C++
     
    Bibliothèque localisations
    Locales et facettes
    Original:
    Locales and facets
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    locale
    Classification des caractères
    Original:
    Character classification
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    Conversions
    Original:
    Conversions
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    Classes de facettes catégorie de base
    Original:
    Facet category base classes
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    Catégories de facettes
    Original:
    Facet categories
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    Spécifique aux paramètres régionaux facettes
    Original:
    Locale-specific facets
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    Facettes de conversion de code
    Original:
    Code conversion facets
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    codecvt_utf8 (C++11)
    codecvt_utf16 (C++11)
    C locale
    Original:
    C locale
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    <tbody> </tbody>
    Déclaré dans l'en-tête <locale>
    template< class internT, class externT, class stateT > class codecvt_byname : public std::codecvt<internT, externT, stateT>;
    std::codecvt_byname est une facette std::codecvt qui encapsule multi-octets / large règles de conversion de caractères d'une variable locale spécifiée lors de sa construction .
    Original:
    std::codecvt_byname is a std::codecvt facet which encapsulates multibyte/wide character conversion rules of a locale specified at its construction.
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    Quatre spécialisations sont fournis par la bibliothèque standard
    Original:
    Four specializations are provided by the standard library
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    Defined in header <locale>
    std::codecvt_byname<char, char, std::mbstate_t>
    conversion identité
    Original:
    identity conversion
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    std::codecvt_byname<char16_t, char, std::mbstate_t>
    conversion entre UTF-16 et UTF-8 (depuis C++11)
    Original:
    conversion between UTF-16 and UTF-8 (depuis C++11)
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    std::codecvt_byname<char32_t, char, std::mbstate_t>
    conversion entre UTF-32 et UTF-8 (depuis C++11)
    Original:
    conversion between UTF-32 and UTF-8 (depuis C++11)
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    std::codecvt_byname<wchar_t, char, std::mbstate_t>
    spécifique à la localisation de conversion entre cordes larges et étroites, éventuellement multi-octets, de la ficelle
    Original:
    locale-specific conversion between wide string and narrow, possibly multibyte, string
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    Fonctions membres
    construit un nouveau codecvt_byname facette
    Original:
    constructs a new codecvt_byname facet
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    (fonction membre publique)
    Détruit une facette codecvt_byname
    Original:
    destructs a codecvt_byname facet
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    (fonction membre protégée)

    Inherited from std::codecvt

    Member types

    Type du membre Définition
    intern_type internT
    extern_type externT
    state_type stateT

    Member objects

    Nom du membre
    Original:
    Member name
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    		 Type
    id (
    statique
    Original:
    static
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    )         		std::locale::id

    Member functions
    Invoque do_out
    Original:
    invokes do_out
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    (fonction membre publique de std::codecvt) [edit]
    Invoque do_in
    Original:
    invokes do_in
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    (fonction membre publique de std::codecvt) [edit]
    Invoque do_unshift
    Original:
    invokes do_unshift
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    (fonction membre publique de std::codecvt) [edit]
    Invoque do_encoding
    Original:
    invokes do_encoding
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    (fonction membre publique de std::codecvt) [edit]
    Invoque do_always_noconv
    Original:
    invokes do_always_noconv
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    (fonction membre publique de std::codecvt) [edit]
    Invoque do_length
    Original:
    invokes do_length
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    (fonction membre publique de std::codecvt) [edit]
    Invoque do_max_length
    Original:
    invokes do_max_length
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    (fonction membre publique de std::codecvt) [edit]

    Protected member functions

    [
    virtuel
    Original:
    virtual
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    ]
    convertit une chaîne de Internt à Externt, comme lors de l'écriture dans un fichier
    Original:
    converts a string from internT to externT, such as when writing to file
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    (fonction membre virtuelle protégée de std::codecvt) [edit]
    [
    virtuel
    Original:
    virtual
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    ]
    convertit une chaîne de Externt à internt, comme lors de la lecture du fichier
    Original:
    converts a string from externT to internT, such as when reading from file
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    (fonction membre virtuelle protégée de std::codecvt) [edit]
    [
    virtuel
    Original:
    virtual
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    ]
    génère la séquence de caractères de terminaison de caractères Externt pour la conversion incomplète
    Original:
    generates the termination character sequence of externT characters for incomplete conversion
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    (fonction membre virtuelle protégée de std::codecvt) [edit]
    [
    virtuel
    Original:
    virtual
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    ]
    retourne le nombre de caractères Externt nécessaires pour produire une Internt caractère, si constante
    Original:
    returns the number of externT characters necessary to produce one internT character, if constant
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    (fonction membre virtuelle protégée de std::codecvt) [edit]
    [
    virtuel
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    virtual
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    ]
    Teste si la facette code pour une conversion d'identité pour toutes les valeurs des arguments valables
    Original:
    tests if the facet encodes an identity conversion for all valid argument values
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    (fonction membre virtuelle protégée de std::codecvt) [edit]
    [
    virtuel
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    virtual
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    ]
    calcule la longueur de la chaîne Externt qui serait consommée par conversion en tampon Internt proposée
    Original:
    calculates the length of the externT string that would be consumed by conversion into given internT buffer
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    (fonction membre virtuelle protégée de std::codecvt) [edit]
    [
    virtuel
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    virtual
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    ]
    retourne le nombre de caractères maximum Externt qui pourraient être transformés en un seul caractère Internt
    Original:
    returns the maximum number of externT characters that could be converted into a single internT character
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    (fonction membre virtuelle protégée de std::codecvt) [edit]


    Inherited from std::codecvt_base

    Type du membre Définition
    enum result { ok, partial, error, noconv };
    Type d'énumération sans portée
    Original:
    Unscoped enumeration type
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    Énumération constante
    Original:
    Enumeration constant
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    		 Definition
    ok
    conversion a été effectuée sans erreur
    Original:
    conversion was completed with no error
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    partial
    tous les caractères de source ont été converties
    Original:
    not all source characters were converted
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    error
    rencontré un caractère non valide
    Original:
    encountered an invalid character
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    noconv
    aucune conversion n'est requise, l'entrée et les types de sortie sont les mêmes
    Original:
    no conversion required, input and output types are the same
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    Exemple

    Cet exemple illustre la lecture d'un fichier GB18030-codé à l'aide de la facette codecvt un lieu GB18030-courant
    Original:
    This example demonstrates reading a GB18030-encoded file using the codecvt facet from a GB18030-aware locale
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    #include <iostream>
#include <fstream>
#include <string>
#include <locale>
int main()
{
    // GB18030 narrow multibyte encoding
    std::ofstream("text.txt") << "\x7a"              // letter 'z', U+007a
                                 "\x81\x30\x89\x38"  // letter 'ß', U+00df
                                 "\xcb\xae"          // CJK ideogram '水' (water), U+6c34
                                 "\x94\x32\xbc\x35"; // musical sign '𝄋' (segno), U+1d10b
    std::wifstream fin("text.txt");
    fin.imbue(std::locale(fin.getloc(),
              new std::codecvt_byname<wchar_t, char, std::mbstate_t>("zh_CN.gb18030")));
    for(wchar_t c; fin.get(c); )
        std::cout << std::hex << std::showbase << c << '\n';
}

    Résultat : 

    0x7a
0xdf
0x6c34
0x1d10b

    Voir aussi
    convertis entre les codages de caractères, y compris UTF-8, UTF-16, UTF-32
    Original:
    converts between character encodings, including UTF-8, UTF-16, UTF-32
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    (classe générique) [edit]
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