iswblank(3)


NAME

   iswblank - test for whitespace wide character

SYNOPSIS

   #include <wctype.h>

   int iswblank(wint_t wc);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

   iswblank():
          _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L

DESCRIPTION

   The  iswblank()  function  is  the  wide-character  equivalent  of  the
   isblank(3) function.  It tests whether wc is a wide character belonging
   to the wide-character class "blank".

   The  wide-character  class  "blank" is a subclass of the wide-character
   class "space".

   Being a  subclass  of  the  wide-character  class  "space",  the  wide-
   character  class  "blank"  is  disjoint  from  the wide-character class
   "graph" and  therefore  also  disjoint  from  its  subclasses  "alnum",
   "alpha", "upper", "lower", "digit", "xdigit", "punct".

   The  wide-character  class  "blank"  always contains at least the space
   character and the control character '\t'.

RETURN VALUE

   The iswblank() function returns nonzero  if  wc  is  a  wide  character
   belonging  to  the wide-character class "blank".  Otherwise, it returns
   zero.

ATTRIBUTES

   For  an  explanation  of  the  terms  used   in   this   section,   see
   attributes(7).

   
   Interface   Attribute      Value          
   
   iswblank()  Thread safety  MT-Safe locale 
   

CONFORMING TO

   POSIX.1-2001, POSIX.1-2008.

NOTES

   The  behavior  of  iswblank()  depends  on the LC_CTYPE category of the
   current locale.

SEE ALSO

   isblank(3), iswctype(3)

COLOPHON

   This page is part of release 4.09 of the Linux  man-pages  project.   A
   description  of  the project, information about reporting bugs, and the
   latest    version    of    this    page,    can     be     found     at
   https://www.kernel.org/doc/man-pages/.





Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.





Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.


Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.





Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.


Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.





Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.


Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.