wide character string transformation
size_t wcsxfrm(wchar_t ws1, const wchar_t ws2, size_t n);
wcsxfrm is part of the X/Open Portability Guide Issue 4 optional
Enhanced Internationalization feature group.
wcsxfrm transforms the wide character string
pointed to by ws2 and places the resulting wide character
string into the array pointed to by ws1.
The transformation does the following:
If wcscmp is applied to two transformed
wide strings, it returns a value greater than,
or equal to, zero, corresponding to the result of
wcscoll applied to the same two original wide character strings.
No more than n wide-character codes are placed into
the resulting array pointed to by wcs1,
including the terminating null wide-character code.
If n is zero, wcs1 can be a null pointer.
If copying takes place between objects that overlap,
the behavior is undefined.
wcsxfrm returns the length necessary to hold the entire transformed wide character
string, not including the terminating null wide-character code.
If the value returned is n or more, the contents of
the array pointed to by ws1 are indeterminate.
wcsxfrm returns -1 and sets errno to ENOSYS.
wcsxfrm may fail if
The ws1 or ws2 arguments contain wide character codes
outside the domain of the collating sequence.
The function is not supported
Since no return value is reserved to show an error,
if you want to check for errors, you should set errno
to 0, call wcscoll, and then check errno.
If it is non-zero, you can assume that an error has occurred.
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 25 April 2004