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BSD 4.3reno

/* ps_get_abs.c - get absolute length */

#ifndef	lint
static char *rcsid = "$Header: /var/lib/cvsd/repos/CSRG/43BSDReno/contrib/isode-beta/psap/ps_get_abs.c,v 1.1.1.1 2018/04/24 16:12:56 root Exp $";
#endif

/* 
 * $Header: /var/lib/cvsd/repos/CSRG/43BSDReno/contrib/isode-beta/psap/ps_get_abs.c,v 1.1.1.1 2018/04/24 16:12:56 root Exp $
 *
 *
 * $Log: ps_get_abs.c,v $
 * Revision 1.1.1.1  2018/04/24 16:12:56  root
 * BSD 4.3reno
 *
 * Revision 7.0  89/11/23  22:13:23  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"

/*    DATA */

int	ps_len_strategy = PS_LEN_SPAG;

/*  */

int	ps_get_abs (pe)
register PE	pe;
{
    register    PElementLen len;
    register    PE p;

    switch (pe -> pe_form) {
	case PE_FORM_PRIM: 
	    len = pe -> pe_len;
	    break;

	case PE_FORM_CONS: 
	    len = 0;
	    for (p = pe -> pe_cons; p; p = p -> pe_next)
		len += ps_get_abs (p);

	    switch (ps_len_strategy) {
		case PS_LEN_SPAG: 
		default: 
		    if (len <= PE_LEN_SMAX) {
			pe -> pe_len = len;
			break;
		    }		/* else fall */

		case PS_LEN_INDF: 
		    pe -> pe_len = PE_LEN_INDF;
		    len += 2;	/* for EOC */
		    break;

		case PS_LEN_LONG: 
		    pe -> pe_len = len;
		    break;
	    }
	    break;

	case PE_FORM_ICONS:
	    return pe -> pe_len;
    }

    return (ps_get_id (pe) + ps_get_len (pe) + len);
}

/*  */

static int  ps_get_id (pe)
register PE	pe;
{
    register int    i;
    register PElementID id;

    if ((id = pe -> pe_id) < PE_ID_XTND)
	return 1;

    for (i = 1; id != 0; id >>= PE_ID_SHIFT)
	i++;
    return i;
}

/*  */

static int  ps_get_len (pe)
register PE	pe;
{
    register int    i;
    register PElementLen len;

    if ((len = pe -> pe_len) == PE_LEN_INDF || len <= PE_LEN_SMAX)
	return 1;

    for (i = 1; len > 0; len >>= 8)
	i++;
    return i;
}

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