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WCTRANS(3) FreeBSD Library Functions Manual WCTRANS(3)
NAME
towctrans, wctrans - wide character mapping functions
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <wctype.h>
wint_t
towctrans(wint_t wc, wctrans_t desc);
wctrans_t
wctrans(const char *charclass);
DESCRIPTION
The wctrans() function returns a value of type wctrans_t which represents
the requested wide character mapping operation and may be used as the
second argument for calls to towctrans().
The following character mapping names are recognised:
tolower toupper
The towctrans() function transliterates the wide character wc according
to the mapping described by desc.
RETURN VALUES
The towctrans() function returns the transliterated character if
successful, otherwise it returns the character unchanged and sets errno.
The wctrans() function returns non-zero if successful, otherwise it
returns zero and sets errno.
EXAMPLES
Reimplement towupper() in terms of towctrans() and wctrans():
wint_t
mytowupper(wint_t wc)
{
return (towctrans(wc, wctrans("toupper")));
}
ERRORS
The towctrans() function will fail if:
[EINVAL] The supplied desc argument is invalid.
The wctrans() function will fail if:
[EINVAL] The requested mapping name is invalid.
SEE ALSO
tolower(3), toupper(3), wctype(3)
STANDARDS
The towctrans() and wctrans() functions conform to IEEE Std 1003.1-2001