iswgraph man page

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iswgraph, iswgraph_l — test for a visible wide-character code

Synopsis

#include <wctype.h>

int iswgraph(wint_t wc);
int iswgraph_l(wint_t wc, locale_t locale);

Description

For iswgraph(): 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 iswgraph() and iswgraph_l() functions shall test whether wc is a wide-character code representing a character of class graph in the current locale, or in the locale represented by locale, respectively; see the Base Definitions volume of POSIX.1‐2008, Chapter 7, Locale.

The wc argument is a wint_t, the value of which the application shall ensure is a wide-character code corresponding to a valid character in the current locale, or equal to the value of the macro WEOF. If the argument has any other value, the behavior is undefined.

The behavior is undefined if the locale argument to iswgraph_l() is the special locale object LC_GLOBAL_LOCALE or is not a valid locale object handle.

Return Value

The iswgraph() and iswgraph_l() functions shall return non-zero if wc is a wide-character code with a visible representation; otherwise, they shall return 0.

Errors

No errors are defined.

The following sections are informative.

Application Usage

To ensure applications portability, especially across natural languages, only these functions and the functions in the reference pages listed in the See Also section should be used for character classification.

See Also

iswalnum(), iswalpha(), iswcntrl(), iswctype(), iswdigit(), iswlower(), iswprint(), iswpunct(), iswspace(), iswupper(), iswxdigit(), setlocale(), uselocale()

The Base Definitions volume of POSIX.1‐2008, Chapter 7, Locale, <locale.h>, <wctype.h>

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