Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

VistaIOSetAttr(3)


NAME

   VistaIOSetAttr - set an attribute's value

SYNOPSIS

   void VistaIOSetAttr (list, name, dict, repn, value)
          VistaIOAttrList list;
          VistaIOStringConst type;
          VistaIODictEntry *dict;
          VistaIORepnKind repn;
          type value;

   void VistaIOSetAttrValue (posn, dict, repn, value)
          VistaIOAttrListPosn posn;
          VistaIODictEntry *dict;
          VistaIORepnKind repn;
          type value;

   where   type,   according   to   repn,   is  VistaIOBit,  VistaIOUByte,
   VistaIOSByte, VistaIOShort, VistaIOLong,  VistaIOFloat,  VistaIODouble,
   VistaIOAttrList,     VistaIOBoolean,     VistaIOBundle,    VistaIOList,
   VistaIOPointer, VistaIOString, VistaIOEdges, VistaIOImage, etc.

ARGUMENTS

   list      Specifies  and  returns  the  attribute  list  in  which   an
             attribute is to be set.

   name      Specifies by name of the attribute to be set.

   posn      Specifies by position the attribute to be set.

   dict      May  specify a dictionary to be used in translating the value
             supplied  to  a  keyword  that  should  be  stored   as   the
             attribute's value, or it may be NULL

   repn      Specifies the representation of the new attribute value.

   value     Specifies the new attribute value.

DESCRIPTION

   These  routines  both  set an attribute's value, but they differ in how
   the attribute is identified:

     * VistaIOSetAttr sets the value of an attribute  named  name  in  the
       attribute  list list. If list does not already contain an attribute
       named name then a new attribute with that name is appended  to  it.
       Otherwise,  only  the  first  attribute  named  name is located and
       changed.

     * VistaIOSetAttrValue sets the value of the attribute whose  position
       within an attribute list is posn.

   With  the  dict argument you can provide a dictionary for mapping value
   to a keyword  that  will  be  stored  as  the  attribute's  value  (see
   VistaIOdictionary(3)). For example, if you pass an attribute value of 1
   and a dictionary that associates the value 1 with the keyword ubyte (as
   the  dictionaryVistaIORepnDict  does),  then  the  string ubyte will be
   stored as the attribute's value. Dictionaries may be used to  map  both
   numeric  values and strings to keywords. If you supply a dictionary but
   value is not mentioned in that dictionary, then value  itself  will  be
   stored with the attribute.

   If  value  is  a  number or character string, the routine makes its own
   copy of the value as a character string for storing in  the  attribute.
   If, on the other hand, value is an attribute list, pointer, image, edge
   set, etc., then the routine stores a pointer in the  attribute  but  it
   does not make a copy of the object pointed to.

RETURN VALUES

   As  a side effect, these routines modify the attribute list referred to
   by list or posn.

EXAMPLES

   The following code fragment sets an image's name:

          VistaIOImage image;

          VistaIOSetAttr (VistaIOImageAttrList (image), VistaIONameAttr, NULL,
                 VistaIOStringRepn, "Mona Lisa");

SEE ALSO

   VistaIOGetAttr(3), VistaIOGetAttrValue(3),
   VistaIOattribute(3), VistaIOdictionary(3),

AUTHOR

   Art Pope <pope@cs.ubc.ca>

   Adaption to vistaio: Gert Wollny <gw.fossdev@gmail.com>



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.


birds banner