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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 ("POSIX.1"). HISTORY The towctrans() and wctrans() functions first appeared in FreeBSD 5.0. FreeBSD 14.1-RELEASE-p8 October 3, 2002 FreeBSD 14.1-RELEASE-p8