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std::mbrtoc32

Da cppreference.com
< cpp‎ | string‎ | multibyte

 
 
Biblioteca cordas
Strings terminadas
Original:
Null-terminated strings
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Cadeias de bytes
Multibyte cordas
Cordas de largura
Classes
Original:
Classes
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basic_string
char_traits
 
Strings terminadas multibyte
Wide / multibyte conversões
Original:
Wide/multibyte conversions
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mbsinit
Tipos
Original:
Types
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mbstate_t
 
Defined in header <cuchar>
std::size_t mbrtoc32( char32_t* pc32,

                      const char* s,
                      std::size_t n,

                      std::mbstate_t* ps );
(a partir do C++ 11)
Converte um caractere multibyte estreita para a sua representação de caracteres de 32 bits (normalmente, UTF-32).
Original:
Converts a narrow multibyte character to its 32-bit character representation (typically, UTF-32).
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Se s não é um ponteiro nulo, inspeciona a maioria dos bytes n da cadeia de caracteres multibyte, começando com o byte apontado pelo s para determinar o número de bytes necessários para completar o personagem multibyte seguinte (incluindo as seqüências de turnos). Se a função determina que o caráter de multibyte próximo s é completa e válida, converte-lo para o personagem de 32 bits correspondente e armazena em *pc32 (se pc32 não é nulo).
Original:
If s is not a null pointer, inspects at most n bytes of the multibyte character string, beginning with the byte pointed to by s to determine the number of bytes necessary to complete the next multibyte character (including any shift sequences). If the function determines that the next multibyte character in s is complete and valid, converts it to the corresponding 32-bit character and stores it in *pc32 (if pc32 is not null).
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Se o personagem multibyte em *s corresponde a uma seqüência de vários char32_t (não é possível com UTF-32), logo após a primeira chamada para esta função, *ps é atualizado de tal maneira que as chamadas ao lado de mbrtoc32 vai escrever o char32_t adicional , sem considerar *s.
Original:
If the multibyte character in *s corresponds to a multi-char32_t sequence (not possible with UTF-32), then after the first call to this function, *ps is updated in such a way that the next calls to mbrtoc32 will write out the additional char32_t, without considering *s.
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Se s é um ponteiro nulo, os valores de n e pc32 são ignorados ea chamada é equivalente a std::mbrtoc32(NULL, "", 1, ps).
Original:
If s is a null pointer, the values of n and pc32 are ignored and the call is equivalent to std::mbrtoc32(NULL, "", 1, ps).
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Se o personagem de largura produzida é o caractere nulo, o *ps estado de conversão representa o estado deslocamento inicial.
Original:
If the wide character produced is the null character, the conversion state *ps represents the initial shift state.
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Se o __STDC_UTF_32__ macro é definida, a codificação de 32 bits utilizado por esta função é UTF-32, caso contrário, é definida pela implementação.
Original:
If the macro __STDC_UTF_32__ is defined, the 32-bit encoding used by this function is UTF-32, otherwise it is implementation-defined.
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[editar] Parâmetros

pc32 -
ponteiro para o local em que o personagem 32-bit resultante será escrito
Original:
pointer to the location where the resulting 32-bit character will be written
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s -
ponteiro para a cadeia de caracteres multibyte usado como entrada
Original:
pointer to the multibyte character string used as input
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n -
limitar o número de bytes em s que podem ser examinados
Original:
limit on the number of bytes in s that can be examined
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ps -
ponteiro para o objeto de estado de conversão utilizado ao interpretar a string multibyte
Original:
pointer to the conversion state object used when interpreting the multibyte string
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[editar] Valor de retorno

O primeiro dos seguintes que se aplica:
Original:
The first of the following that applies:
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  • 0 se o personagem convertido de s (e armazenados na *pc32 se não nulo) foi o caractere nulo
    Original:
    0 if the character converted from s (and stored in *pc32 if non-null) was the null character
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  • o número de bytes [1...n] do caractere multibyte convertidos com êxito a partir de s
    Original:
    the number of bytes [1...n] of the multibyte character successfully converted from s
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  • -3 se o char32_t próxima de um caráter multi-char32_t já foi escrito para *pc32. Sem bytes são processados ​​a partir da entrada, neste caso,.
    Original:
    -3 if the next char32_t from a multi-char32_t character has now been written to *pc32. No bytes are processed from the input in this case.
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  • -2 se os bytes n próximos constituem um incompleta, mas até agora válida personagem, multibyte. Nada é escrito para *pc32.
    Original:
    -2 if the next n bytes constitute an incomplete, but so far valid, multibyte character. Nothing is written to *pc32.
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  • -1 se ocorre erro de codificação. Nada é escrito para *pc32, o EILSEQ valor é armazenado em errno eo valor se *ps é indeterminado.
    Original:
    -1 if encoding error occurs. Nothing is written to *pc32, the value EILSEQ is stored in errno and the value if *ps is unspecified.
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[editar] Veja também

(C++11)
converte um caractere de 32 bits de largura para estreitar string multibyte
Original:
convert a 32-bit wide character to narrow multibyte string
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(função) [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
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(virtual protegido of std::codecvt função de membro) [edit]
C documentation for mbrtoc32