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   wcstok    ( 3 )

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Имя (Name)

wcstok - split wide-character string into tokens

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Синопсис (Synopsis)

#include <wchar.h>

wchar_t *wcstok(wchar_t *restrict wcs, const wchar_t *restrict delim, wchar_t **restrict ptr);

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Описание (Description)

The wcstok() function is the wide-character equivalent of the strtok(3) function, with an added argument to make it multithread-safe. It can be used to split a wide-character string wcs into tokens, where a token is defined as a substring not containing any wide-characters from delim.

The search starts at wcs, if wcs is not NULL, or at *ptr, if wcs is NULL. First, any delimiter wide-characters are skipped, that is, the pointer is advanced beyond any wide-characters which occur in delim. If the end of the wide-character string is now reached, wcstok() returns NULL, to indicate that no tokens were found, and stores an appropriate value in *ptr, so that subsequent calls to wcstok() will continue to return NULL. Otherwise, the wcstok() function recognizes the beginning of a token and returns a pointer to it, but before doing that, it zero-terminates the token by replacing the next wide-character which occurs in delim with a null wide character (L'\0'), and it updates *ptr so that subsequent calls will continue searching after the end of recognized token.

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Возвращаемое значение (Return value)

The wcstok() function returns a pointer to the next token, or NULL if no further token was found.

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Атрибуты (Attributes)

For an explanation of the terms used in this section, see attributes(7).

┌──────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├──────────────────────────────────────┼───────────────┼─────────┤ │wcstok() │ Thread safety │ MT-Safe │ └──────────────────────────────────────┴───────────────┴─────────┘

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Стандарты (Conforming to)

POSIX.1-2001, POSIX.1-2008, C99.

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Примечание (Note)

The original wcs wide-character string is destructively modified during the operation.

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Примеры (Examples)

The following code loops over the tokens contained in a wide-
       character string.

       wchar_t *wcs = ...;
       wchar_t *token;
       wchar_t *state;
       for (token = wcstok(wcs, L" \t\n", &state);
           token != NULL;
           token = wcstok(NULL, L" \t\n", &state)) {
           ...
       }

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Смотри также (See also)

strtok(3), wcschr(3)

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