/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */

#include "mail.h"
/*
 * Remove an entry from its linked list and free any malloc'd memory..
 */
void poplist (hdrtype, where)
register int    hdrtype;
register int    where;
{
        struct  hdrs    *hdr2rm, *cont2rm, *nextcont;

        /* Remove first/last entry from list */

        hdr2rm = (where == HEAD ?
                        hdrlines[hdrtype].head : hdrlines[hdrtype].tail);

        if (hdr2rm == (struct hdrs *)NULL) {
                return;
        }
        if (where == HEAD) {
                if (hdr2rm->next == (struct hdrs *)NULL) {
                        /* Only 1 entry in list */
                        hdrlines[hdrtype].head = hdrlines[hdrtype].tail =
                                                        (struct hdrs *)NULL;
                } else {
                        hdrlines[hdrtype].head = hdr2rm->next;
                        hdr2rm->next->prev = (struct hdrs *)NULL;
                }
        } else {
                if (hdr2rm->prev == (struct hdrs *)NULL) {
                        /* Only 1 entry in list */
                        hdrlines[hdrtype].head = hdrlines[hdrtype].tail =
                                                        (struct hdrs *)NULL;
                } else {
                        hdrlines[hdrtype].tail = hdr2rm->prev;
                        hdr2rm->prev->next = (struct hdrs *)NULL;
                }
        }
        /* Keep track of total bytes added to message due to    */
        /* selected lines in case non-delivery                  */
        /* notification needs to be sent. (See also copylet())  */
        if (hdrtype == H_AFWDFROM) {
            affbytecnt -=
                (strlen(header[H_AFWDFROM].tag) + strlen(hdr2rm->value) + 2);
            affcnt--;
        }
        if (hdrtype == H_RECEIVED) {
            rcvbytecnt -=
                (strlen(header[H_RECEIVED].tag) + strlen(hdr2rm->value) + 2);
        }

        cont2rm = hdr2rm->cont;
        while (cont2rm != (struct hdrs *)NULL) {
                nextcont = cont2rm->next;
                if (hdrtype == H_AFWDFROM) {
                    affbytecnt -= (strlen(cont2rm->value) + 1);
                    affcnt--;
                }
                if (hdrtype == H_RECEIVED) {
                    rcvbytecnt -= (strlen(cont2rm->value) + 1);
                }
                free ((char *)cont2rm);
                cont2rm = nextcont;
        }
        free ((char *)hdr2rm);
}