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NAME
     tt_file_objects_query - find all objects in the named file

SYNOPSIS
     #include <Tt/tt_c.h>
     Tt_status tt_file_objects_query(const char *filepath,
                                     Tt_filter_function filter,
                                     void *context,
                                     void *accumulator);

DESCRIPTION
     The tt_file_objects_query() function instructs the  ToolTalk
     service  to  find all objects in the named file and pass the
     objids to the filter  function.   The  context  pointer  and
     accumulator  pointer  initially specified are also passed to
     the filter function.

     As the ToolTalk service finds  each  object,  it  calls  the
     filter function, passing the objid of the object and the two
     application-supplied pointers.  The filter function performs
     its  computation  and  returns a Tt_filter_action value that
     tells the query function whether to  continue  or  to  stop.
     Tt_filter_action values are:

        TT_FILTER_CONTINUE
                The query function should continue.

        TT_FILTER_STOP
                The query function should stop.

     The filepath argument is the name of the file to be searched
     for  objects.  The filter argument is the filter function to
     which the objids are to be passed.  The context argument  is
     a  pointer  to  any information the filter needs to execute.
     The ToolTalk service does not interpret this  argument,  but
     passes  it directly to the filter function.  The accumulator
     argument is a pointer to where the filter is  to  store  the
     results  of  the  query and filter operations.  The ToolTalk
     service does not interpret  this  argument,  but  passes  it
     directly to the filter function.

RETURN VALUE
     Upon  successful  completion,  the   tt_file_objects_query()
     function  returns  the status of the operation as one of the
     following Tt_status values:

        TT_OK   The operation completed successfully.

        TT_ERR_DBAVAIL
                The ToolTalk service could not access  the  Tool-
                Talk database needed for this operation.

        TT_ERR_DBEXIST
                The ToolTalk service could not access the  speci-
                fied ToolTalk database in the expected place.

        TT_ERR_NOMP
                The ttsession(1) process is not running  and  the
                ToolTalk service cannot restart it.

        TT_ERR_PATH
                The specified pathname included  an  unsearchable
                directory.

        TT_WRN_STOPPED
                The query operation being performed was halted by
                Tt_filter_function.

SEE ALSO
     tt_c(5).

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