.ref-BSD-4_3_Net_2/usr/src/contrib/isode/psap/pe_extract.c

/* pe_extract.c - extract a PE */

#ifndef lint
static char *rcsid = "$Header: /f/osi/psap/RCS/pe_extract.c,v 7.2 91/02/22 09:36:14 mrose Interim $";
#endif

/*
 * $Header: /f/osi/psap/RCS/pe_extract.c,v 7.2 91/02/22 09:36:14 mrose Interim $
 *
 *
 * $Log:        pe_extract.c,v $
 * Revision 7.2  91/02/22  09:36:14  mrose
 * Interim 6.8
 *
 * Revision 7.1  91/01/24  14:50:25  mrose
 * update
 *
 * Revision 7.0  89/11/23  22:13:04  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"

/* \f */

/* assumes that q appears at most once directly under p... */

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

    switch (pe -> pe_form) {
        case PE_FORM_PRIM:
        case PE_FORM_ICONS:
            break;

        case PE_FORM_CONS:
            for (p = &pe -> pe_cons; q = *p; p = &q -> pe_next)
                if (q == r) {
                    (*p) = q -> pe_next;
                    q -> pe_next = NULLPE;
                    if (r->pe_refcnt > 0)
                            r->pe_refcnt--;
                    return 1;
                }
                else
                    if (pe_extract (q, r))
                        return 1;
            break;
    }

    return 0;
}