Net2/usr/src/contrib/isode/psap/seq_add.c

/* seq_add.c - add an element to a sequence */

#ifndef	lint
static char *rcsid = "$Header: /f/osi/psap/RCS/seq_add.c,v 7.1 91/02/22 09:36:51 mrose Interim $";
#endif

/* 
 * $Header: /f/osi/psap/RCS/seq_add.c,v 7.1 91/02/22 09:36:51 mrose Interim $
 *
 *
 * $Log:	seq_add.c,v $
 * Revision 7.1  91/02/22  09:36:51  mrose
 * Interim 6.8
 * 
 * Revision 7.0  89/11/23  22:13:35  mrose
 * Release 6.0
 * 
 */

/*
 *				  NOTICE
 *
 *    Acquisition, use, and distribution of this module and related
 *    materials are subject to the restrictions of a license agreement.
 *    Consult the Preface in the User's Manual for the full terms of
 *    this agreement.
 *
 */


/* LINTLIBRARY */

#include <stdio.h>
#include "psap.h"

/*  */

int	seq_add (pe, r, i)
register PE	pe,
		r;
register int	i;
{
    register PE	   *p,
		    q;

    if (r == NULLPE)
	return pe_seterr (pe, PE_ERR_NMEM, NOTOK);

    if (i < 0)
	i = pe -> pe_cardinal;
    for (p = &pe -> pe_cons; q = *p; p = &q -> pe_next)
	if (q -> pe_offset == i) {
	    r -> pe_next = q -> pe_next;
	    pe_free (q);
	    break;
	}
	else
	    if (q -> pe_offset > i) {
		r -> pe_next = q;
		break;
	    }

    *p = r;
    if ((r -> pe_offset = i) >= pe -> pe_cardinal)
	pe -> pe_cardinal = i + 1;

    return OK;
}