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std::codecvt_byname

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< cpp‎ | locale

 
 
ローカライゼーションライブラリ
ロケールおよびファセット
Original:
Locales and facets
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locale
文字分類
Original:
Character classification
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変換
Original:
Conversions
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ファセットカテゴリの基底クラスです
Original:
Facet category base classes
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ファセットカテゴリ
Original:
Facet categories
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ロケール固有のファセット
Original:
Locale-specific facets
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コー​​ド変換ファセット
Original:
Code conversion facets
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codecvt_utf8(C++11)
codecvt_utf16(C++11)
Cロケール
Original:
C locale
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Defined in header <locale>
template< class internT, class externT, class stateT >
class codecvt_byname : public std::codecvt<internT, externT, stateT>;
std::codecvt_bynameその建設時に指定されたロケールのマルチバイト/ワイド文字の変換規則をカプセル化std::codecvtファセットです.
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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四つの専門分野は、標準ライブラリで提供されています
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>
恒等変換
Original:
identity conversion
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std::codecvt_byname<char16_t, char, std::mbstate_t>
UTF-16とUTF-8間の変換(C++11およびそれ以降)
Original:
conversion between UTF-16 and UTF-8 (C++11およびそれ以降)
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std::codecvt_byname<char32_t, char, std::mbstate_t>
UTF-32とUTF-8間の変換(C++11およびそれ以降)
Original:
conversion between UTF-32 and UTF-8 (C++11およびそれ以降)
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std::codecvt_byname<wchar_t, char, std::mbstate_t>
ワイド文字列と狭く、おそらくマルチバイト文字列の間のロケール固有の変換
Original:
locale-specific conversion between wide string and narrow, possibly multibyte, string
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目次

[編集] メンバ関数

新しいcodecvt_bynameファセットを構築します
Original:
constructs a new codecvt_byname facet
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(パブリックメンバ関数)
codecvt_bynameファセットを破棄します
Original:
destructs a codecvt_byname facet
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(protectedメンバー関数)

Inherited from std::codecvt

Member types

メンバー·タイプ
Original:
Member type
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Definition
intern_type internT
extern_type externT
state_type stateT

Member objects

メンバー名
Original:
Member name
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Type
id (静的) std::locale::id

Member functions

do_outを呼び出します
Original:
invokes do_out
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(パブリックメンバ関数of std::codecvt) [edit]
do_inを呼び出します
Original:
invokes do_in
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(パブリックメンバ関数of std::codecvt) [edit]
do_unshiftを呼び出します
Original:
invokes do_unshift
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(パブリックメンバ関数of std::codecvt) [edit]
do_encodingを呼び出します
Original:
invokes do_encoding
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(パブリックメンバ関数of std::codecvt) [edit]
do_always_noconvを呼び出します
Original:
invokes do_always_noconv
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(パブリックメンバ関数of std::codecvt) [edit]
do_lengthを呼び出します
Original:
invokes do_length
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(パブリックメンバ関数of std::codecvt) [edit]
do_max_lengthを呼び出します
Original:
invokes do_max_length
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(パブリックメンバ関数of std::codecvt) [edit]

Protected member functions

[仮想]
そのようなファイルに書き込むときのように、internTからexternTに文字列を変換します
Original:
converts a string from internT to externT, such as when writing to file
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(仮想protectedメンバ関数of std::codecvt) [edit]
[仮想]
そのようなファイルからの読み込みの場合のように、externTからinternTに文字列を変換します
Original:
converts a string from externT to internT, such as when reading from file
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(仮想protectedメンバ関数of std::codecvt) [edit]
[仮想]
不完全な変換のためexternT文字の終端文字列を生成する
Original:
generates the termination character sequence of externT characters for incomplete conversion
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(仮想protectedメンバ関数of std::codecvt) [edit]
[仮想]
一定の場合には、1 internT文字を生成するのに必要なexternT文字の数を返します
Original:
returns the number of externT characters necessary to produce one internT character, if constant
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(仮想protectedメンバ関数of std::codecvt) [edit]
ファセットかどうかをテストし、すべての有効な引数値の恒等変換をエンコードします
Original:
tests if the facet encodes an identity conversion for all valid argument values
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(仮想protectedメンバ関数of std::codecvt) [edit]
[仮想]
与えられたinternTバッファに変換することによって消費されるexternT文字列の長さを計算します
Original:
calculates the length of the externT string that would be consumed by conversion into given internT buffer
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(仮想protectedメンバ関数of std::codecvt) [edit]
シングルinternT文字に変換することができるexternT文字の最大数を返します
Original:
returns the maximum number of externT characters that could be converted into a single internT character
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(仮想protectedメンバ関数of std::codecvt) [edit]


Inherited from std::codecvt_base

メンバー·タイプ
Original:
Member type
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Definition
enum result { ok, partial, error, noconv };
対象範囲外の列挙型
Original:
Unscoped enumeration type
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列挙定数
Original:
Enumeration constant
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Definition
ok
変換はエラーなしで完了しました
Original:
conversion was completed with no error
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partial
ていないすべてのソースの文字が変換されました
Original:
not all source characters were converted
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error
無効な文字を検出しました
Original:
encountered an invalid character
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noconv
変換が必要なく、入力と出力の種類が同じものはありません
Original:
no conversion required, input and output types are the same
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[編集]

この例では、GB18030対応のロケールからcodecvtファセットを使用して、GB18030でエンコードされたファイルを読み込む方法を示しています
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';
}

Output:

0x7a
0xdf
0x6c34
0x1d10b

[編集] も参照してください

UTF-8、UTF-16、UTF-32を含む文字エンコーディング間の変換を行います
Original:
converts between character encodings, including UTF-8, UTF-16, UTF-32
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(クラステンプレート) [edit]