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NAME

       VistaIOReadEdges - read a series of edge sets from a stream

SYNOPSIS

       #include <stdio>
       #include <vistaio.h>
       #include <vistaio.h>

       int VistaIOReadEdges (file, attributes, edge_sets)
              FILE *file;
              VistaIOAttrList *attributes;
              VistaIOEdges (*edge_sets)[];

ARGUMENTS

       file      Specifies  the open stream from which the edge sets should be
                 read.

       attributes
                 Returns a list of attributes read from the stream.

       edge_sets Returns a vector of pointers to edge sets read.

DESCRIPTION

       VistaIOReadEdges reads a Vista data file from an open stream,  collects
       the  top-level  edge  sets  found, and returns the edge sets separately
       from the file's other contents.

RETURN VALUES

       VistaIOReadEdges returns the number of edge sets obtained, or 0  if  an
       error  is  encountered.  A  vector  of  the  edge sets is allocated and
       returned via edge_sets.  Any  other  objects  found  in  the  file  are
       returned as an attribute list via attributes.

SEE ALSO

       VistaIOReadFile(3), VistaIOReadObjects(3), stdio(3),
       VistaIOEdges(3)

DIAGNOSTICS

       Besides   the   following,   any   of   the   diagnostics  produced  by
       VistaIOReadFile may be generated.

       ``No edges objects present in stream.''
              No edge sets were encountered in the specified stream.

AUTHOR

       David Lowe <lowe@cs.ubc.ca>

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



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