usr/src/contrib/ed/c.c

/*-
 * Copyright (c) 1992 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Rodney Ruddock of the University of Guelph.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)c.c 5.5 (Berkeley) %G%";
#endif /* not lint */

#include <sys/types.h>

#include <regex.h>
#include <setjmp.h>
#include <stdio.h>

#ifdef DBI
#include <db.h>
#endif

#include "ed.h"
#include "extern.h"

/*
 * This deletes the range of lines specified and then sets up things
 * for the central input routine.
 */

void
c(inputt, errnum)
        FILE *inputt;
        int *errnum;
{
        int l_flag=1;

        if (Start_default && End_default)
                Start = End = current;
        else
                if (Start_default)
                        Start = End;
        if (Start == NULL) {
                *errnum = -1;
                return;
        }
        Start_default = End_default = 0;
        if (End == bottom)
                l_flag = 0;

        /* first delete the lines */
        d(inputt, errnum);
        if (*errnum < 0)
                return;
        *errnum = 0;

        /*if ((current != NULL) && (current != bottom)) RMSR */
        if ((current != NULL) && l_flag)
                current = current->above;
        add_flag = 1;
        Start_default = End_default = 1;
        /* now get the "change" lines */
        input_lines(inputt, errnum);
        add_flag = 0;
}