[text.c.strings]
28 Text processing library [text]
28.7 Null-terminated sequence utilities [text.c.strings]
28.7.1 Header <cctype> synopsis [cctype.syn]
28.7.2 Header <cwctype> synopsis [cwctype.syn]
28.7.3 Header <cwchar> synopsis [cwchar.syn]
28.7.4 Header <cuchar> synopsis [cuchar.syn]
28.7.5 Multibyte / wide string and character conversion functions [c.mb.wcs]
28.7.1 Header <cctype> synopsis [cctype.syn]
namespace std { int isalnum(int c); int isalpha(int c); int isblank(int c); int iscntrl(int c); int isdigit(int c); int isgraph(int c); int islower(int c); int isprint(int c); int ispunct(int c); int isspace(int c); int isupper(int c); int isxdigit(int c); int tolower(int c); int toupper(int c); }
The contents and meaning of the header are the same as the C standard library header .
See also: ISO/IEC 9899:2024, 7.4
28.7.2 Header <cwctype> synopsis [cwctype.syn]
namespace std { using wint_t = see below; using wctrans_t = see below; using wctype_t = see below; int iswalnum(wint_t wc); int iswalpha(wint_t wc); int iswblank(wint_t wc); int iswcntrl(wint_t wc); int iswdigit(wint_t wc); int iswgraph(wint_t wc); int iswlower(wint_t wc); int iswprint(wint_t wc); int iswpunct(wint_t wc); int iswspace(wint_t wc); int iswupper(wint_t wc); int iswxdigit(wint_t wc); int iswctype(wint_t wc, wctype_t desc); wctype_t wctype(const char* property); wint_t towlower(wint_t wc); wint_t towupper(wint_t wc); wint_t towctrans(wint_t wc, wctrans_t desc); wctrans_t wctrans(const char* property); } #define WEOF see below
The contents and meaning of the header are the same as the C standard library header .
See also: ISO/IEC 9899:2024, 7.32
28.7.3 Header <cwchar> synopsis [cwchar.syn]
The contents and meaning of the header are the same as the C standard library header , except that it does not declare a type wchar_t.
[Note 1:
The functions wcschr, wcspbrk, wcsrchr, wcsstr, and wmemchr have different signatures in this document, but they have the same behavior as in the C standard library ([library.c]).
— end note]
See also: ISO/IEC 9899:2024, 7.31
28.7.4 Header <cuchar> synopsis [cuchar.syn]
#define __STDC_VERSION_UCHAR_H__ 202311L namespace std { using mbstate_t = see below; using size_t = see [support.types.layout]; size_t mbrtoc8(char8_t* pc8, const char* s, size_t n, mbstate_t* ps); size_t c8rtomb(char* s, char8_t c8, mbstate_t* ps); size_t mbrtoc16(char16_t* pc16, const char* s, size_t n, mbstate_t* ps); size_t c16rtomb(char* s, char16_t c16, mbstate_t* ps); size_t mbrtoc32(char32_t* pc32, const char* s, size_t n, mbstate_t* ps); size_t c32rtomb(char* s, char32_t c32, mbstate_t* ps); }
The contents and meaning of the header are the same as the C standard library header , except that it does not declare types char8_t, char16_t, or char32_t.
See also: ISO/IEC 9899:2024, 7.30
28.7.5 Multibyte / wide string and character conversion functions [c.mb.wcs]
int mbsinit(const mbstate_t* ps);
int mblen(const char* s, size_t n);
size_t mbstowcs(wchar_t* pwcs, const char* s, size_t n);
size_t wcstombs(char* s, const wchar_t* pwcs, size_t n);
Effects: These functions have the semantics specified in the C standard library.
See also: ISO/IEC 9899:2024, 7.24.8.2, 7.24.9, 7.31.6.3.1
int mbtowc(wchar_t* pwc, const char* s, size_t n);
int wctomb(char* s, wchar_t wchar);
Effects: These functions have the semantics specified in the C standard library.
Remarks: Calls to these functions may introduce a data race ([res.on.data.races]) with other calls to the same function.
See also: ISO/IEC 9899:2024, 7.24.8
size_t mbrlen(const char* s, size_t n, mbstate_t* ps);
size_t mbrtowc(wchar_t* pwc, const char* s, size_t n, mbstate_t* ps);
size_t wcrtomb(char* s, wchar_t wc, mbstate_t* ps);
size_t mbrtoc8(char8_t* pc8, const char* s, size_t n, mbstate_t* ps);
size_t c8rtomb(char* s, char8_t c8, mbstate_t* ps);
size_t mbrtoc16(char16_t* pc16, const char* s, size_t n, mbstate_t* ps);
size_t c16rtomb(char* s, char16_t c16, mbstate_t* ps);
size_t mbrtoc32(char32_t* pc32, const char* s, size_t n, mbstate_t* ps);
size_t c32rtomb(char* s, char32_t c32, mbstate_t* ps);
size_t mbsrtowcs(wchar_t* dst, const char** src, size_t len, mbstate_t* ps);
size_t wcsrtombs(char* dst, const wchar_t** src, size_t len, mbstate_t* ps);
Effects: These functions have the semantics specified in the C standard library.
Remarks: Calling these functions with an mbstate_t* argument that is a null pointer value may introduce a data race ([res.on.data.races]) with other calls to the same function with an mbstate_t* argument that is a null pointer value.
See also: ISO/IEC 9899:2024, 7.30.2, 7.31.6.4, 7.31.6.5