WCSTOK(3) Linux Programmer's Manual WCSTOK(3)
NAME
wcstok - split wide-character string into tokens
SYNOPSIS
#include <wchar.h>
wchar_t *wcstok(wchar_t *wcs, const wchar_t *delim, wchar_t **ptr);
DESCRIPTION
The wcstok function is the wide-character equivalent of the strtok 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, i.e. 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 con-
tinue 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 L' ' character, and it updates *ptr
so that subsequent calls will continue searching after the end of recognized token.
RETURN VALUE
The wcstok function returns a pointer to the next token, or NULL if no further token was found.
NOTES
The original wcs wide-character string is destructively modified during the operation.
EXAMPLE
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, "
", &state);
token != NULL;
token = wcstok(NULL, "
", &state)) {
...
}
CONFORMING TO
ISO/ANSI C, UNIX98
SEE ALSO
strtok(3), wcschr(3)
GNU
1999-07-25 WCSTOK(3)
