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    std::mbrtoc32

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    < cpp‎ | string‎ | multibyte

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    C++
     
    Strings Bibliothek
    Null-terminierte Strings
    Original:
    Null-terminated strings
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    Byte-Strings
    Multibyte-Strings
    Wide Strings
    Classes
    Original:
    Classes
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    basic_string
    char_traits
     
    Nullterminierten Multibyte Strings
    Wide / Multibyte Konvertierungen
    Original:
    Wide/multibyte conversions
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    mbsinit
    Types
    Original:
    Types
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    mbstate_t
     
    definiert in Header <cuchar>
    std::size_t mbrtoc32(char32_t* pc32,

                          constchar* s,
                          std::size_t n,

                          std::mbstate_t* ps );
    		(seit C++11)
    Konvertiert einen schmalen Multibyte-Zeichen des 32-Bit-Zeichen-Darstellung (in der Regel, UTF-32) .
    Original:
    Converts a narrow multibyte character to its 32-bit character representation (typically, UTF-32).
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    Wenn s nicht ein NULL-Zeiger, prüft in den meisten n Bytes des Multibyte-String, beginnend mit dem Byte, auf das s, um die Anzahl von Bytes um den nächsten Multibyte-Zeichen (einschließlich etwaiger Schichtfolgen) vervollständigen bestimmen. Wenn die Funktion bestimmt, dass die nächste Multibyte-Zeichen in s vollständig und gültig ist, wandelt sie in die entsprechende 32-Bit-Zeichen und speichert sie in *pc32 (wenn pc32 nicht null ist) .
    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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    Wenn die Multibyte-Zeichen in *s entspricht einer multi-char32_t Sequenz (nicht möglich bei UTF-32), dann nach dem ersten Aufruf dieser Funktion wird *ps in einer solchen Weise, dass die nächsten Anrufe mbrtoc32 schreibt die zusätzliche char32_t aktualisiert , ohne Berücksichtigung *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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    Wenn s ein NULL-Zeiger ist, die Werte der n und pc32 werden ignoriert und der Anruf ist äquivalent zu 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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    Wenn die weite Zeichen produziert, ist das Null-Zeichen stellt die Umwandlung Zustand *ps die erste Schaltzustand .
    Original:
    If the wide character produced is the null character, the conversion state *ps represents the initial shift state.
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    Wenn das Makro __STDC_UTF_32__ definiert ist, ist die 32-Bit-Codierung von dieser Funktion verwendet UTF-32, ansonsten ist die Implementierung definiert .
    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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    [Bearbeiten]Parameter

    pc32 -
    Zeiger auf die Stelle, wo die resultierende 32-Bit-Zeichen geschrieben werden
    Original:
    pointer to the location where the resulting 32-bit character will be written
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    s -
    Zeiger auf die Multibyte Zeichenkette als Eingabe verwendet
    Original:
    pointer to the multibyte character string used as input
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    n -
    Grenze für die Anzahl von Bytes in s, die untersucht werden können
    Original:
    limit on the number of bytes in s that can be examined
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    ps -
    Zeiger auf die Umwandlung state-Objekt verwendet werden, wenn der Interpretation der Multibyte-String
    Original:
    pointer to the conversion state object used when interpreting the multibyte string
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    [Bearbeiten]Rückgabewert

    Die erste, die der folgenden gilt:
    Original:
    The first of the following that applies:
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    • ​0​ wenn der Charakter von s umgewandelt (und in *pc32 wenn nicht null) war die Null-Zeichen
      Original:
      ​0​ if the character converted from s (and stored in *pc32 if non-null) was the null character
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    • die Anzahl der Bytes [1...n] des Multibyte erfolgreich aus s umgewandelt
      Original:
      the number of bytes [1...n] of the multibyte character successfully converted from s
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    • -3 wenn die nächste char32_t aus einem Multi-char32_t Charakter Jetzt *pc32 geschrieben worden. Keine Bytes aus dem Eingangssignal in diesem Fall verarbeitet .
      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 wenn die nächsten n bytes bilden eine unvollständige, aber bisher gültige Multibyte-Zeichens. Nichts wird dem *pc32 geschrieben .
      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 wenn die Kodierung Fehler auftritt. Nichts zu *pc32 geschrieben wird, wird der Wert EILSEQ in errno gespeichert und der Wert, wenn *ps ist unbegrenzt .
      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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    [Bearbeiten]Siehe auch

    (C++11)
    konvertiert einen 32-Bit breiten Zeichen Multibyte-String einzugrenzen
    Original:
    convert a 32-bit wide character to narrow multibyte string
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    (Funktion)[edit]
    [virtuell]
    wandelt eine Zeichenkette aus externT um Internt wie beim Lesen aus Datei
    Original:
    converts a string from externT to internT, such as when reading from file
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    (virtuellen geschützten Member-Funktion of std::codecvt)[edit]
    C documentation for mbrtoc32
    Von „https://de.cppreference.com/mwiki/index.php?title=cpp/string/multibyte/mbrtoc32&oldid=27925“
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