NAME

wcsxfrm — transform a wide string under locale

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <wchar.h>

size_t
wcsxfrm(wchar_t * restrict dst, const wchar_t * restrict src, size_t n);

DESCRIPTION

The wcsxfrm() function transforms a nul-terminated wide-character string pointed to by src according to the current locale collation order then copies the transformed string into dst. No more than n wide characters are copied into dst, including the terminating nul character added. If n is set to 0 (it helps to determine an actual size needed for transformation), dst is permitted to be a null pointer.

Comparing two strings using wcscmp() after wcsxfrm() is equivalent to comparing two original strings with wcscoll().

RETURN VALUES

Upon successful completion, wcsxfrm() returns the length of the transformed string not including the terminating nul character. If this value is n or more, the contents of dst are indeterminate.

SEE ALSO

setlocale(3), strxfrm(3), wcscmp(3), wcscoll(3)

STANDARDS

The wcsxfrm() function conforms to ISO/IEC 9899:1999 (“ISO C99”).

BUGS

The current implementation of wcsxfrm() function disregards LC_COLLATE locales, and falls back to using the wcsncpy() function.