Movatterモバイル変換


[0]ホーム

URL:


cppreference.com
Namespaces
Variants
    Actions

      Standard library header <cwchar>

      From cppreference.com
      <cpp‎ |header
       
       
      Standard library headers
       

      This header was originally in the C standard library as<wchar.h>.

      This header is part of the null-terminatedwide andmultibyte strings libraries.It also provides someC-style I/O functions and conversion fromC-style Date.

      Contents

      [edit]Macros

      implementation-defined null pointer constant
      (macro constant)[edit]
      WEOF
      a non-character value of typestd::wint_t used to indicate errors
      (macro constant)
      WCHAR_MIN
      the smallest valid value ofwchar_t
      (macro constant)
      WCHAR_MAX
      the largest valid value ofwchar_t
      (macro constant)

      [edit]Types

      conversion state information necessary to iterate multibyte character strings
      (class)[edit]
      unsigned integer type returned by thesizeof operator
      (typedef)[edit]
      wint_t integer type that can hold any valid wide character and at least one more value
      calendar time type
      (class)[edit]

      [edit]Functions

      String manipulation
      copies one wide string to another
      (function)[edit]
      copies a certain amount of wide characters from one string to another
      (function)[edit]
      appends a copy of one wide string to another
      (function)[edit]
      appends a certain amount of wide characters from one wide string to another
      (function)[edit]
      transform a wide string so thatwcscmp would produce the same result aswcscoll
      (function)[edit]
      String examination
      returns the length of a wide string
      (function)[edit]
      compares two wide strings
      (function)[edit]
      compares a certain amount of characters from two wide strings
      (function)[edit]
      compares two wide strings in accordance to the current locale
      (function)[edit]
      finds the first occurrence of a wide character in a wide string
      (function)[edit]
      finds the last occurrence of a wide character in a wide string
      (function)[edit]
      returns the length of the maximum initial segment that consists
      of only the wide characters found in another wide string
      (function)[edit]
      returns the length of the maximum initial segment that consists
      of only the widenot found in another wide string
      (function)[edit]
      finds the first location of any wide character in one wide string, in another wide string
      (function)[edit]
      finds the first occurrence of a wide string within another wide string
      (function)[edit]
      finds the next token in a wide string
      (function)[edit]
      Wide character array manipulation
      copies a certain amount of wide characters between two non-overlapping arrays
      (function)[edit]
      copies a certain amount of wide characters between two, possibly overlapping, arrays
      (function)[edit]
      compares a certain amount of wide characters from two arrays
      (function)[edit]
      finds the first occurrence of a wide character in a wide character array
      (function)[edit]
      copies the given wide character to every position in a wide character array
      (function)[edit]
      Multibyte/wide character conversion
      checks if thestd::mbstate_t object represents initial shift state
      (function)[edit]
      widens a single-byte narrow character to wide character, if possible
      (function)[edit]
      narrows a wide character to a single-byte narrow character, if possible
      (function)[edit]
      returns the number of bytes in the next multibyte character, given state
      (function)[edit]
      converts the next multibyte character to wide character, given state
      (function)[edit]
      converts a wide character to its multibyte representation, given state
      (function)[edit]
      converts a narrow multibyte character string to wide string, given state
      (function)[edit]
      converts a wide string to narrow multibyte character string, given state
      (function)[edit]
      Input/Output
      gets a wide character from a file stream
      (function)[edit]
      gets a wide string from a file stream
      (function)[edit]
      writes a wide character to a file stream
      (function)[edit]
      writes a wide string to a file stream
      (function)[edit]
      reads a wide character fromstdin
      (function)[edit]
      writes a wide character tostdout
      (function)[edit]
      puts a wide character back into a file stream
      (function)[edit]
      switches a file stream between wide character I/O and narrow character I/O
      (function)[edit]
      reads formatted wide character input fromstdin, a file stream or a buffer
      (function)[edit]
      (C++11)(C++11)(C++11)
      reads formatted wide character input fromstdin, a file stream
      or a buffer using variable argument list
      (function)[edit]
      prints formatted wide character output tostdout, a file stream or a buffer
      (function)[edit]
      prints formatted wide character output tostdout, a file stream
      or a buffer using variable argument list
      (function)[edit]
      String conversions
      converts astd::tm object to custom wide string textual representation
      (function)[edit]
      converts a wide string to an integer value
      (function)[edit]
      converts a wide string to an unsigned integer value
      (function)[edit]
      converts a wide string to a floating-point value
      (function)[edit]

      [edit]Notes

      [edit]Synopsis

      namespace std{using size_t=/* see description */;// freestandingusing mbstate_t=/* see description */;// freestandingusing wint_t=/* see description */;// freestanding struct tm; int fwprintf(FILE* stream,constwchar_t* format, ...);int fwscanf(FILE* stream,constwchar_t* format, ...);int swprintf(wchar_t* s, size_t n,constwchar_t* format, ...);int swscanf(constwchar_t* s,constwchar_t* format, ...);int vfwprintf(FILE* stream,constwchar_t* format,va_list arg);int vfwscanf(FILE* stream,constwchar_t* format,va_list arg);int vswprintf(wchar_t* s, size_t n,constwchar_t* format,va_list arg);int vswscanf(constwchar_t* s,constwchar_t* format,va_list arg);int vwprintf(constwchar_t* format,va_list arg);int vwscanf(constwchar_t* format,va_list arg);int wprintf(constwchar_t* format, ...);int wscanf(constwchar_t* format, ...);  wint_t fgetwc(FILE* stream);wchar_t* fgetws(wchar_t* s,int n, FILE* stream);  wint_t fputwc(wchar_t c, FILE* stream);int fputws(constwchar_t* s, FILE* stream);int fwide(FILE* stream,int mode);  wint_t getwc(FILE* stream);  wint_t getwchar();  wint_t putwc(wchar_t c, FILE* stream);  wint_t putwchar(wchar_t c);  wint_t ungetwc(wint_t c, FILE* stream);double wcstod(constwchar_t* nptr,wchar_t** endptr);float wcstof(constwchar_t* nptr,wchar_t** endptr);longdouble wcstold(constwchar_t* nptr,wchar_t** endptr);longint wcstol(constwchar_t* nptr,wchar_t** endptr,int base);longlongint wcstoll(constwchar_t* nptr,wchar_t** endptr,int base);unsignedlongint wcstoul(constwchar_t* nptr,wchar_t** endptr,int base);unsignedlonglongint wcstoull(constwchar_t* nptr,wchar_t** endptr,int base);wchar_t* wcscpy(wchar_t* s1,constwchar_t* s2);// freestandingwchar_t* wcsncpy(wchar_t* s1,constwchar_t* s2, size_t n);// freestandingwchar_t* wmemcpy(wchar_t* s1,constwchar_t* s2, size_t n);// freestandingwchar_t* wmemmove(wchar_t* s1,constwchar_t* s2, size_t n);// freestandingwchar_t* wcscat(wchar_t* s1,constwchar_t* s2);// freestandingwchar_t* wcsncat(wchar_t* s1,constwchar_t* s2, size_t n);// freestandingint wcscmp(constwchar_t* s1,constwchar_t* s2);// freestandingint wcscoll(constwchar_t* s1,constwchar_t* s2);int wcsncmp(constwchar_t* s1,constwchar_t* s2, size_t n);// freestanding  size_t wcsxfrm(wchar_t* s1,constwchar_t* s2, size_t n);int wmemcmp(constwchar_t* s1,constwchar_t* s2, size_t n);// freestandingconstwchar_t* wcschr(constwchar_t* s,wchar_t c);// freestandingwchar_t* wcschr(wchar_t* s,wchar_t c);// freestanding  size_t wcscspn(constwchar_t* s1,constwchar_t* s2);// freestandingconstwchar_t* wcspbrk(constwchar_t* s1,constwchar_t* s2);// freestandingwchar_t* wcspbrk(wchar_t* s1,constwchar_t* s2);// freestandingconstwchar_t* wcsrchr(constwchar_t* s,wchar_t c);// freestandingwchar_t* wcsrchr(wchar_t* s,wchar_t c);// freestanding  size_t wcsspn(constwchar_t* s1,constwchar_t* s2);// freestandingconstwchar_t* wcsstr(constwchar_t* s1,constwchar_t* s2);// freestandingwchar_t* wcsstr(wchar_t* s1,constwchar_t* s2);// freestandingwchar_t* wcstok(wchar_t* s1,constwchar_t* s2,wchar_t** ptr);// freestandingconstwchar_t* wmemchr(constwchar_t* s,wchar_t c, size_t n);// freestandingwchar_t* wmemchr(wchar_t* s,wchar_t c, size_t n);// freestanding  size_t wcslen(constwchar_t* s);// freestandingwchar_t* wmemset(wchar_t* s,wchar_t c, size_t n);// freestanding  size_t wcsftime(wchar_t* s, size_t maxsize,constwchar_t* format,const tm* timeptr);  wint_t btowc(int c);int wctob(wint_t c); // multibyte / wide string and character conversion functionsint mbsinit(const mbstate_t* ps);  size_t mbrlen(constchar* s, size_t n, mbstate_t* ps);  size_t mbrtowc(wchar_t* pwc,constchar* s, size_t n, mbstate_t* ps);  size_t wcrtomb(char* s,wchar_t wc, mbstate_t* ps);  size_t mbsrtowcs(wchar_t* dst,constchar** src, size_t len, mbstate_t* ps);  size_t wcsrtombs(char* dst,constwchar_t** src, size_t len, mbstate_t* ps);} #define NULL      /* see description */ // freestanding#define WCHAR_MAX /* see description */ // freestanding#define WCHAR_MIN /* see description */ // freestanding#define WEOF      /* see description */ // freestanding

      [edit]Defect reports

      The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

      DRApplied toBehavior as publishedCorrect behavior
      LWG 345C++98std::tm was not provided in<cwchar>provided
      Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/header/cwchar&oldid=158967"

      [8]ページ先頭

      ©2009-2025 Movatter.jp