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std::wcstoimax, std::wcstoumax

De cppreference.com
< cpp‎ | string‎ | wide

 
 
Strings biblioteca
Terminadas en nulo
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Null-terminated strings
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Cadenas de bytes
Multibyte cuerdas
Cadenas anchas
Clases
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Classes
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basic_string
char_traits
 
Terminadas en nulo de ancho
Funciones
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Functions
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De manipulación de caracteres
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Character manipulation
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Las conversiones a formatos numéricos
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Conversions to numeric formats
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Cadena de manipulación
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String manipulation
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Matriz de manipulación
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Array manipulation
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wmemcpy
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Defined in header <cwchar>
std::intmax_t wcstoimax( const wchar_t* nptr, wchar_t** endptr, int base);
(desde C++11)
std::uintmax_t wcstoumax( const wchar_t* nptr, wchar_t** endptr, int base);
(desde C++11)
Interpreta un valor entero sin signo en una serie amplia apuntada por nptr .
Original:
Interprets an unsigned integer value in a wide string pointed to by nptr.
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Function discards any whitespace characters until first non-whitespace character is found. Then it takes as many characters as possible to form a valid base-n (where n=base) unsigned integer number representation and converts them to an integer value. The valid unsigned integer value consists of the following parts: None

  • (opcional) prefix (0) indicating octal base (applies only when the base is 8)
  • (opcional) prefix (0x or 0X) indicating hexadecimal base (applies only when the base is 16)
  • a sequence of digits

The set of valid digits for base-2 integer is 01, for base-3 integer is 012, and so on. For bases larger than 10, valid digits include alphabetic characters, starting from Aa for base-11 integer, to Zz for base-36 integer. The case of the characters is ignored.

Las funciones establece el puntero que apunta al punto endptr al carácter ancho allá del último carácter interpretado. Si endptr es NULL, se omite .
Original:
The functions sets the pointer pointed to by endptr to point to the wide character past the last character interpreted. If endptr is NULL, it is ignored.
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Contenido

[editar] Parámetros

nptr -
puntero a la cadena terminada en cero de ancho para ser interpretada
Original:
pointer to the null-terminated wide string to be interpreted
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endptr -
puntero a un puntero a un carácter ancho .
Original:
pointer to a pointer to a wide character.
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base -
Base del valor entero interpretado
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base of the interpreted integer value
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[editar] Valor de retorno

Valor entero correspondiente al contenido de str en caso de éxito. Si el valor convertido cae fuera del rango del tipo de cambio correspondiente, se produce error de rango y INTMAX_MAX, INTMAX_MIN, UINTMAX_MAX o 0 se devuelve, según corresponda. Si la conversión no se puede realizar, 0 se devuelve .
Original:
Integer value corresponding to the contents of str on success. If the converted value falls out of range of corresponding return type, range error occurs and INTMAX_MAX, INTMAX_MIN, UINTMAX_MAX, or 0 is returned, as appropriate. If no conversion can be performed, 0 is returned.
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[editar] Ejemplo

#include <iostream>
#include <string>
#include <cinttypes>
 
int main()
{
    std::wstring str = L"helloworld";
    std::intmax_t val = std::wcstoimax(str.c_str(), nullptr, 36);
    std::wcout << str << " in base 36 is " << val << " in base 10\n";
 
    wchar_t* nptr;
    val = std::wcstoimax(str.c_str(), &nptr, 30);
    if(nptr != &str[0] + str.size())
        std::wcout << str << " in base 30 is invalid."
                  << " The first invalid digit is " << *nptr << '\n';
}

Output:

helloworld in base 36 is 1767707668033969 in base 10
helloworld in base 30 is invalid. The first invalid digit is w

[editar] Ver también

(C++11)
(C++11)
convierte una cadena de bytes a std::intmax_t o std::uintmax_t
Original:
converts a byte string to std::intmax_t or std::uintmax_t
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(función) [edit]
convierte una cadena gruesa y un valor entero
Original:
converts a wide string to an integer value
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(función) [edit]
convierte una cadena gruesa y un valor entero sin signo
Original:
converts a wide string to an unsigned integer value
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(función) [edit]
C documentation for wcstoimax, wcstoumax