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); }
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
namespace std { using size_t = see [support.types.layout]; void* memcpy(void* s1, const void* s2, size_t n); void* memmove(void* s1, const void* s2, size_t n); char* strcpy(char* s1, const char* s2); char* strncpy(char* s1, const char* s2, size_t n); char* strcat(char* s1, const char* s2); char* strncat(char* s1, const char* s2, size_t n); int memcmp(const void* s1, const void* s2, size_t n); int strcmp(const char* s1, const char* s2); int strcoll(const char* s1, const char* s2); int strncmp(const char* s1, const char* s2, size_t n); size_t strxfrm(char* s1, const char* s2, size_t n); const void* memchr(const void* s, int c, size_t n); // see [library.c] void* memchr(void* s, int c, size_t n) // see [library.c] const char* strchr(const char* s, int c) // see [library.c] char* strchr(char* s, int c) // see [library.c] size_t strcspn(const char* s1, const char* s2); const char* strpbrk(const char* s1, const char* s2) // see [library.c] char* strpbrk(char* s1, const char* s2) // see [library.c] const char* strrchr(const char* s, int c) // see [library.c] char* strrchr(char* s, int c) // see [library.c] size_t strspn(const char* s1, const char* s2); const char* strstr(const char* s1, const char* s2) // see [library.c] char* strstr(char* s1, const char* s2) // see [library.c] char* strtok(char* s1, const char* s2); void* memset(void* s, int c, size_t n); char* strerror(int errnum); size_t strlen(const char* s); } #define NULL see [support.types.nullptr]
The contents and meaning of the header <cstring> are the same as the C standard library header <string.h>.
[ Note: The functions strchr, strpbrk, strrchr, strstr, and memchr, have different signatures in this International Standard, but they have the same behavior as in the C standard library. — end note ]
See also: ISO C 7.24.
namespace std { using size_t = see [support.types.layout]; using mbstate_t = see below; using wint_t = see below; struct tm; int fwprintf(FILE* stream, const wchar_t* format, ...); int fwscanf(FILE* stream, const wchar_t* format, ...); int swprintf(wchar_t* s, size_t n, const wchar_t* format, ...); int swscanf(const wchar_t* s, const wchar_t* format, ...); int vfwprintf(FILE* stream, const wchar_t* format, va_list arg); int vfwscanf(FILE* stream, const wchar_t* format, va_list arg); int vswprintf(wchar_t* s, size_t n, const wchar_t* format, va_list arg); int vswscanf(const wchar_t* s, const wchar_t* format, va_list arg); int vwprintf(const wchar_t* format, va_list arg); int vwscanf(const wchar_t* format, va_list arg); int wprintf(const wchar_t* format, ...); int wscanf(const wchar_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(const wchar_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(const wchar_t* nptr, wchar_t** endptr); float wcstof(const wchar_t* nptr, wchar_t** endptr); long double wcstold(const wchar_t* nptr, wchar_t** endptr); long int wcstol(const wchar_t* nptr, wchar_t** endptr, int base); long long int wcstoll(const wchar_t* nptr, wchar_t** endptr, int base); unsigned long int wcstoul(const wchar_t* nptr, wchar_t** endptr, int base); unsigned long long int wcstoull(const wchar_t* nptr, wchar_t** endptr, int base); wchar_t* wcscpy(wchar_t* s1, const wchar_t* s2); wchar_t* wcsncpy(wchar_t* s1, const wchar_t* s2, size_t n); wchar_t* wmemcpy(wchar_t* s1, const wchar_t* s2, size_t n); wchar_t* wmemmove(wchar_t* s1, const wchar_t* s2, size_t n); wchar_t* wcscat(wchar_t* s1, const wchar_t* s2); wchar_t* wcsncat(wchar_t* s1, const wchar_t* s2, size_t n); int wcscmp(const wchar_t* s1, const wchar_t* s2); int wcscoll(const wchar_t* s1, const wchar_t* s2); int wcsncmp(const wchar_t* s1, const wchar_t* s2, size_t n); size_t wcsxfrm(wchar_t* s1, const wchar_t* s2, size_t n); int wmemcmp(const wchar_t* s1, const wchar_t* s2, size_t n); const wchar_t* wcschr(const wchar_t* s, wchar_t c) // see [library.c] wchar_t* wcschr(wchar_t* s, wchar_t c) // see [library.c] size_t wcscspn(const wchar_t* s1, const wchar_t* s2); const wchar_t* wcspbrk(const wchar_t* s1, const wchar_t* s2) // see [library.c] wchar_t* wcspbrk(wchar_t* s1, const wchar_t* s2) // see [library.c] const wchar_t* wcsrchr(const wchar_t* s, wchar_t c) // see [library.c] wchar_t* wcsrchr(wchar_t* s, wchar_t c) // see [library.c] size_t wcsspn(const wchar_t* s1, const wchar_t* s2); const wchar_t* wcsstr(const wchar_t* s1, const wchar_t* s2) // see [library.c] wchar_t* wcsstr(wchar_t* s1, const wchar_t* s2) // see [library.c] wchar_t* wcstok(wchar_t* s1, const wchar_t* s2, wchar_t** ptr); const wchar_t* wmemchr(const wchar_t* s, wchar_t c, size_t n) // see [library.c] wchar_t* wmemchr(wchar_t* s, wchar_t c, size_t n) // see [library.c] size_t wcslen(const wchar_t* s); wchar_t* wmemset(wchar_t* s, wchar_t c, size_t n); size_t wcsftime(wchar_t* s, size_t maxsize, const wchar_t* format, const struct tm* timeptr); wint_t btowc(int c); int wctob(wint_t c); // [c.mb.wcs], multibyte / wide string and character conversion functions int mbsinit(const mbstate_t* ps); 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 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); } #define NULL see [support.types.nullptr] #define WCHAR_MAX see below #define WCHAR_MIN see below #define WEOF see below
The contents and meaning of the header <cwchar> are the same as the C standard library header <wchar.h>, except that it does not declare a type wchar_t.
[ Note: The functions wcschr, wcspbrk, wcsrchr, wcsstr, and wmemchr have different signatures in this International Standard, but they have the same behavior as in the C standard library. — end note ]
See also: ISO C 7.29
namespace std { using mbstate_t = see below; using size_t = see [support.types.layout]; 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); }
[ Note: The headers <cstdlib> and <cwchar> declare the functions described in this subclause. — end note ]
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);
See also: ISO C 7.22.7.1, 7.22.8, 7.29.6.2.1
int mbtowc(wchar_t* pwc, const char* s, size_t n);
int wctomb(char* s, wchar_t wchar);
Remarks: Calls to these functions may introduce a data race ([res.on.data.races]) with other calls to the same function.
See also: ISO C 7.22.7
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 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);
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 C 7.29.6.3