WCSTOK(3) BSD Programmer's Manual WCSTOK(3)
wcstok - split wide-character string into tokens
#include <wchar.h>
wchar_t *
wcstok(wchar_t * restrict str, const wchar_t * restrict sep,
wchar_t ** restrict last);
The wcstok() function is used to isolate sequential tokens in a NUL-
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.
The wcstok() function returns a pointer to the beginning of each subse-
quent token in the string, after replacing the token itself with a NUL
wide character (L'\0'). When no more tokens remain, a null pointer is re-
turned.
The following code fragment splits a wide character string on ASCII
space, tab, and newline characters and writes the tokens to standard out-
put:
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);
strtok(3), wcschr(3), wcscspn(3), wcspbrk(3), wcsrchr(3), wcsspn(3)
The wcstok() function conforms to ISO/IEC 9899:1999 ("ISO C99").
Some early implementations of wcstok() omit the context pointer argument,
last, and maintain state across calls in a static variable like strtok()
does.
MirOS BSD #10-current October 3, 2002 1
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