WCTRANS_L(3) Library Functions Manual WCTRANS_L(3)

NAME

wctrans wctrans_l — define character mapping

SYNOPSIS

#include <wctype.h>

wctrans_t wctrans(const char *charclass);
[CX] wctrans_t wctrans_l(const char *charclass, locale_t locale);

DESCRIPTION

For wctrans (): [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.1-2008 defers to the ISO C standard.

The wctrans () [CX] and wctrans_l () functions are defined for valid character mapping names identified in the current locale. The charclass is a string identifying a generic character mapping name for which codeset-specific information is required. The following character mapping names are defined in all locales: tolower and toupper.

These functions shall return a value of type wctrans_t, which can be used as the second argument to subsequent calls of towctrans(3) [CX] and towctrans_l(3).

The wctrans () [CX] and wctrans_l () functions shall determine values of wctrans_t according to the rules of the coded character set defined by character mapping information in the locale of the process [CX] or in the locale represented by locale, respectively (category LC_CTYPE ).

The values returned by wctrans () shall be valid until a call to setlocale(3) that modifies the category LC_CTYPE .

[CX] The values returned by wctrans_l () shall be valid only in calls to wctrans_l () with a locale represented by locale with the same LC_CTYPE category value.

RETURN VALUE

The wctrans () [CX] and wctrans_l () functions shall return 0 and may set errno to indicate the error if the given character mapping name is not valid for the current locale (category LC_CTYPE ); otherwise, they shall return a non-zero object of type wctrans_t that can be used in calls to towctrans(3) [CX] and towctrans_l(3).