Originální popis anglicky:
wcstok - split a wide-character string into tokens
Návod, kniha: POSIX Programmer's Manual
#include <wchar.h>
wchar_t *wcstok(wchar_t *restrict
ws1, const wchar_t
*restrict ws2,
wchar_t **restrict
ptr );
A sequence of calls to
wcstok() shall break the wide-character string
pointed to by
ws1 into a sequence of tokens, each of which shall be
delimited by a wide-character code from the wide-character string pointed to
by
ws2. The
ptr argument points to a caller-provided
wchar_t pointer into which the
wcstok() function shall store
information necessary for it to continue scanning the same wide-character
string.
The first call in the sequence has
ws1 as its first argument, and is
followed by calls with a null pointer as their first argument. The separator
string pointed to by
ws2 may be different from call to call.
The first call in the sequence shall search the wide-character string pointed to
by
ws1 for the first wide-character code that is
not contained
in the current separator string pointed to by
ws2. If no such
wide-character code is found, then there are no tokens in the wide-character
string pointed to by
ws1 and
wcstok() shall return a null
pointer. If such a wide-character code is found, it shall be the start of the
first token.
The
wcstok() function shall then search from there for a wide-character
code that
is contained in the current separator string. If no such
wide-character code is found, the current token extends to the end of the
wide-character string pointed to by
ws1, and subsequent searches for a
token shall return a null pointer. If such a wide-character code is found, it
shall be overwritten by a null wide character, which terminates the current
token. The
wcstok() function shall save a pointer to the following
wide-character code, from which the next search for a token shall start.
Each subsequent call, with a null pointer as the value of the first argument,
shall start searching from the saved pointer and behave as described above.
The implementation shall behave as if no function calls
wcstok().
Upon successful completion, the
wcstok() function shall return a pointer
to the first wide-character code of a token. Otherwise, if there is no token,
wcstok() shall return a null pointer.
No errors are defined.
The following sections are informative.
None.
None.
None.
None.
The Base Definitions volume of IEEE Std 1003.1-2001,
<wchar.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
