posix man page for isgraph

ISGRAPH(3P)						     POSIX Programmer's Manual						       ISGRAPH(3P)

PROLOG
       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME
       isgraph, isgraph_l -- test for a visible character

SYNOPSIS
       #include <ctype.h>

       int isgraph(int c);
       int isgraph_l(int c, locale_t locale);

DESCRIPTION
       For isgraph(): 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  isgraph()  and isgraph_l() functions shall test whether c is a character of class graph in the current locale, or in the locale repre-
       sented by locale, respectively; see the Base Definitions volume of POSIX.1-2008, Chapter 7, Locale.

       The c argument is an int, the value of which the application shall ensure is a character representable as an unsigned char or equal to  the
       value of the macro EOF. If the argument has any other value, the behavior is undefined.

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

RETURN VALUE
       The isgraph() and isgraph_l() functions shall return non-zero if c is a character with a  visible  representation;  otherwise,  they  shall
       return 0.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

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.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       isalnum(), isalpha(), isblank(), iscntrl(), isdigit(), islower(), isprint(), ispunct(), isspace(), isupper(), isxdigit(), setlocale(), use-
       locale()

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

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C)  2013  by	the  Institute	of
       Electrical and Electronics Engineers, Inc and The Open Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
       event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Stan-
       dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE
/The Open Group						       2013							       ISGRAPH(3P)