NAME
wcscat —
concatenate two wide-character strings
SYNOPSIS
#include
<wchar.h>
wchar_t *wcscat(wchar_t *restrict ws1, const wchar_t *restrict ws2);
DESCRIPTION
[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2024 defers to the ISO C standard.
The wcscat () function shall append a copy
of the wide-character string pointed to by ws2 (including
the terminating null wide-character code) to the end of the wide-character
string pointed to by ws1. The initial wide-character code
of ws2 shall overwrite the null wide-character code at the
end of ws1. If copying takes place between objects that
overlap, the behavior is undefined.
[CX] The wcscat ()
function shall not change the setting of errno on valid
input.
RETURN VALUE
The wcscat () function shall return
ws1; no return value is reserved to indicate an error.
ERRORS
No errors are defined.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
XBD <wchar.h>
CHANGE HISTORY
First released in Issue 4. Derived from the MSE working draft.
Issue 6
The Open Group Corrigendum U040/2 is applied. In the RETURN VALUE section, s1 is changed to ws1.
The wcscat () prototype is updated for
alignment with the ISO/IEC 9899:1999
(“ISO C99”) standard.
Issue 8
Austin Group Defect 448 is applied, adding a requirement that
wcscat () does not change the setting of
errno on valid input.