std::strxfrm

 

C++

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文字列ライブラリ

NULLで終端された文字列

バイト文字列

マルチバイト文字列

ワイド文字列

クラス

basic_string

char_traits

 

NULL終端バイト文字列

機能します Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
文字操作 Original: Character manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
isalnum isalpha islower isupper isdigit isxdigit isblank (C++11)	iscntrl isgraph isspace isprint ispunct tolower toupper
数値形式への変換 Original: Conversions to numeric formats The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
atof atoi atol atoll strtol strtoll	strtoul strtoull strtof strtod strtold
文字列操作 Original: String manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
strcpy
strncpy
strcat
strncat
strxfrm
文字列の検査 Original: String examination The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
strlen strcmp strncmp strcoll strchr strrchr	strspn strcspn strpbrk strstr strtok
メモリ操作 Original: Memory manipulation The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
memchr
memcmp
memset
memcpy
memmove
その他 Original: Miscellaneous The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
strerror

 

Defined in header <cstring>
std::size_t strxfrm( const char* dest, const char* src, std::size_t count );

srcを持つ2つの変換された文字列を比較すると、現在のCロケールで、std::strcmpで元の文字列を比較するのと同じ結果を与えるような実装で定義された形式にstd::strcollが指すNULL終端バイト文字列を変換します.

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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変換された文字列の最初のcount文字が終端のNULL文字を含む、先に書き込まれており、完全な変換された文字列の長さは、終端のNULL文字を除く、返された.

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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count​0​であれば、destはNULLポインタであることが許可されている.

Original:

If count is ​0​, then dest is allowed to be a null pointer.

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ノート

全体の変換された文字列を受け取ることができるバッファの正しい長さが1+std::strxfrm(NULL, src, 0)です

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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パラメータ

dest	-	変換後の文字列が書き込まれる配列の最初の要素へのポインタ Original: pointer to the first element of the array where the transformed string will be written The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
src	-	変換するNULL終端バイト文字列の最初の文字へのポインタ Original: pointer to the first character of a null-terminated byte string to transform The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
count	-	書き込まれる文字の最大数 Original: maximum number of characters to be written The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

値を返します

終端のNULL文字を含む変換された文字列の長さは、.

Original:

The length of the transformed string, not including the terminating null-character.

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例

このコードを実行します

#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';
 
}

出力:

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

参照

wcsxfrm	wcscmp関数は、wcscoll関数と同じ結果を生成するように、ワイド文字列を変換します Original: transform a wide string so that wcscmp would produce the same result as wcscoll The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (関数)
do_transform [仮想]	その照合は比較に置き換えることができるように文字列を変換します Original: transforms a string so that collation can be replaced by comparison The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (仮想protectedメンバ関数of std::collate)
strcoll	現在のロケールに応じた2つの文字列を比較する Original: compares two strings in accordance to the current locale The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (関数)
C documentation for strxfrm