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 5.1 (Berkeley) %G%";
#endif /* not lint */

#include "ed.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;

{

  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;

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

  if ((current != NULL) && (current != bottom))
    current = current->above;
  if (sigint_flag)
    SIGINT_ACTION;
  add_flag = 1;
  start_default = End_default = 1;
  /* now get the "change" lines */
  input_lines(inputt, errnum);
  add_flag = 0;
} /* end-c */