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std::strxfrm

De cppreference.com
< cpp‎ | string‎ | byte

 
 
Strings biblioteca
Terminadas en nulo
Original:
Null-terminated strings
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Cadenas de bytes
Multibyte cuerdas
Cadenas anchas
Clases
Original:
Classes
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basic_string
char_traits
 
Terminadas en nulo de bytes
Funciones
Original:
Functions
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De manipulación de caracteres
Original:
Character manipulation
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Las conversiones a formatos numéricos
Original:
Conversions to numeric formats
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Cadena de manipulación
Original:
String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
Cadena examen
Original:
String examination
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Memoria manipulación
Original:
Memory manipulation
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memchr
memcmp
memset
memcpy
memmove
Varios
Original:
Miscellaneous
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strerror
 
Defined in header <cstring>
std::size_t strxfrm( const char* dest, const char* src, std::size_t count );
Transforma la cadena de bytes de terminación nula apuntado por src en la forma de implantación definido de tal manera que comparar dos cadenas transformadas con std::strcmp da el mismo resultado que la comparación de las cadenas originales con std::strcoll, en la actual configuración regional C .
Original:
Transforms the null-terminated byte string pointed to by src into the implementation-defined form such that comparing two transformed strings with std::strcmp gives the same result as comparing the original strings with std::strcoll, in the current C locale.
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Los caracteres count primero de la cadena transformada se escriben en destino, incluyendo el carácter nulo de terminación, y la longitud de la cadena completa transformada se devuelve, excluido el carácter nulo de terminación .
Original:
The first count characters of the transformed string are written to destination, including the terminating null character, and the length of the full transformed string is returned, excluding the terminating null character.
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Si count es 0, entonces dest se le permite ser un puntero nulo .
Original:
If count is 0, then dest is allowed to be a null pointer.
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Contenido

[editar] Notas

La longitud correcta del búfer que puede recibir toda la cadena transformada es 1+std::strxfrm(NULL, src, 0)
Original:
The correct length of the buffer that can receive the entire transformed string is 1+std::strxfrm(NULL, src, 0)
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[editar] Parámetros

dest -
puntero al primer elemento de la matriz donde se realizará la cadena transformada escrito
Original:
pointer to the first element of the array where the transformed string will be written
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src -
puntero al primer carácter de una cadena de bytes terminada en cero para transformar
Original:
pointer to the first character of a null-terminated byte string to transform
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count -
número máximo de caracteres que se pueden escribir
Original:
maximum number of characters to be written
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[editar] Valor de retorno

La longitud de la cadena transformada, no incluyendo el carácter de terminación en nulo .
Original:
The length of the transformed string, not including the terminating null-character.
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[editar] Ejemplo

#include <iostream>
#include <iomanip>
#include <cstring>
 
int main()
{
    std::setlocale(LC_COLLATE, "cs_CZ.iso88592");
 
    std::string in1 = "hrnec";
    std::string out1(1+std::strxfrm(nullptr, in1.c_str(), 0), ' ');
    std::string in2 = "chrt";
    std::string out2(1+std::strxfrm(nullptr, in2.c_str(), 0), ' ');
 
    std::strxfrm(&out1[0], in1.c_str(), out1.size());
    std::strxfrm(&out2[0], in2.c_str(), out2.size());
 
    std::cout << "In the Czech locale: ";
    if(out1 < out2)
         std::cout << in1 << " before " << in2 << '\n';
    else
         std::cout << in2 << " before " << in1 << '\n';
 
    std::cout << "In lexicographical comparison: ";
    if(in1 < in2)
         std::cout << in1 << " before " << in2 << '\n';
    else
         std::cout << in2 << " before " << in1 << '\n';
 
}

Output:

In the Czech locale: hrnec before chrt
In lexicographical comparison: chrt before hrnec

[editar] Ver también

transformar una cadena de ancho para que wcscmp produciría el mismo resultado que wcscoll
Original:
transform a wide string so that wcscmp would produce the same result as wcscoll
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(función) [edit]
[virtual]
transforma una cadena para que intercalación puede ser sustituido por comparación
Original:
transforms a string so that collation can be replaced by comparison
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(virtuales protegidos of std::collate miembro de función) [edit]
compara dos cadenas de acuerdo a la localización actual
Original:
compares two strings in accordance to the current locale
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(función) [edit]
C documentation for strxfrm