Copyright (c) 1998 Softweyr LLC. All rights reserved.
strtok_r, from Berkeley strtok
Oct 13, 1998 by Wes Peters <wes (at] softweyr.com>
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the American National Standards Committee X3, on Information
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Original version ID:
FreeBSD: src/lib/libc/string/wcstok.3,v 1.4 2002/10/15 09:49:54 tjr Exp
.Dd October 3, 2002 .Dt WCSTOK 3 .Os .Sh NAME .Nm wcstok .Nd split wide-character string into tokens .Sh LIBRARY .Lb libc .Sh SYNOPSIS n wchar.h .Ft wchar_t * .Fn wcstok "wchar_t * restrict str" "const wchar_t * restrict sep" "wchar_t ** restrict last" .Sh DESCRIPTION The .Fn wcstok function is used to isolate sequential tokens in a nul-terminated wide-character string, .Fa str . These tokens are separated in the string by at least one of the characters in .Fa sep . The first time that .Fn wcstok is called, .Fa str should be specified; subsequent calls, wishing to obtain further tokens from the same string, should pass a null pointer instead. The separator string, .Fa sep , must be supplied each time, and may change between calls. The context pointer .Fa last must be provided on each call.
p The .Fn wcstok function is the wide-character counterpart of the .Fn strtok_r function. .Sh RETURN VALUES The .Fn wcstok function returns a pointer to the beginning of each subsequent token in the string, after replacing the token itself with a nul wide character (L'\e0'). When no more tokens remain, a null pointer is returned. .Sh EXAMPLES The following code fragment splits a wide-character string on .Tn ASCII space, tab and newline characters and writes the tokens to standard output: d -literal -offset indent const wchar_t *seps = L" \et\en"; wchar_t *last, *tok, text[] = L" \enone\ettwo\et\etthree \en"; for (tok = wcstok(text, seps, &last); tok != NULL; tok = wcstok(NULL, seps, &last)) wprintf(L"%ls\en", tok); .Ed .Sh SEE ALSO .Xr strtok 3 , .Xr wcschr 3 , .Xr wcscspn 3 , .Xr wcspbrk 3 , .Xr wcsrchr 3 , .Xr wcsspn 3 .Sh STANDARDS The .Fn wcstok function conforms to .St -isoC-99 .
p Some early implementations of .Fn wcstok omit the context pointer argument, .Fa last , and maintain state across calls in a static variable like .Xr strtok 3 does.
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