60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
/*
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* Copyright (c) 1989, 1990 by the University of Washington
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*
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* For copying and distribution information, please see the file
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* <uw-copyright.h>.
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*/
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#include <uw-copyright.h>
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#include <stdio.h>
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#include <pfs.h>
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#include <perrno.h>
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/*
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* fl_insert - Add a filter to a link
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*
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* FL_INSERT takes a filter, and a link that is to receive
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* the filter. The filter is then appended to the linked list
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* of filters associated with the link.
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*
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* ARGS: fil - Filter to be inserted, lin - Link to get filter
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*
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* RETURNS: PSUCCESS - always
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*/
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int
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fl_insert(fil,lin)
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#if 0
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VLINK fil; /* Filter to be inserted */
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#endif
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FILTER fil;
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VLINK lin; /* Link to receive filter */
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{
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APPEND_ITEM(fil, lin->filters);
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#if 0
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VLINK current; /* To step through list */
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/* If this is the first filter in the link */
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if(lin->filters == NULL) {
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lin->filters = fil;
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fil->previous = NULL;
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fil->next = NULL;
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return(PSUCCESS);
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}
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/* Otherwise, find the last filter */
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current = lin->filters;
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while(current->next) current = current->next;
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/* insert the new filter */
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current->next = fil;
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fil->next = NULL;
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fil->previous = current;
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#endif
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return(PSUCCESS);
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}
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