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Man Pages


Manual Reference Pages  -  WCSTOK (3)

NAME

wcstok - split wide-character string into tokens

CONTENTS

Library
Synopsis
Description
Return Values
Examples
Compatibility
See Also
Standards

LIBRARY


.Lb libc

SYNOPSIS


.In wchar.h wchar_t * wcstok wchar_t * restrict str const wchar_t * restrict sep wchar_t ** restrict last

DESCRIPTION

The wcstok function is used to isolate sequential tokens in a null-terminated wide character string, str. These tokens are separated in the string by at least one of the characters in sep. The first time that wcstok is called, str should be specified; subsequent calls, wishing to obtain further tokens from the same string, should pass a null pointer instead. The separator string, sep, must be supplied each time, and may change between calls. The context pointer last must be provided on each call.

The wcstok function is the wide character counterpart of the strtok_r function.

RETURN VALUES

The wcstok function returns a pointer to the beginning of each subsequent token in the string, after replacing the token itself with a null wide character (L’\0’). When no more tokens remain, a null pointer is returned.

EXAMPLES

The following code fragment splits a wide character string on ASCII space, tab and newline characters and writes the tokens to standard output:
const wchar_t *seps = L" \t\n";
wchar_t *last, *tok, text[] = L" \none\ttwo\t\tthree  \n";

for (tok = wcstok(text, seps, &last); tok != NULL; tok = wcstok(NULL, seps, &last))         wprintf(L"%ls\n", tok);

COMPATIBILITY

Some early implementations of wcstok omit the context pointer argument, last, and maintain state across calls in a static variable like strtok does.

SEE ALSO

strtok(3), wcschr(3), wcscspn(3), wcspbrk(3), wcsrchr(3), wcsspn(3)

STANDARDS

The wcstok function conforms to -isoC-99.
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