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  This file is part of HA, a general purpose file archiver.
  Copyright (C) 1995 Harri Hirvola

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
      HA I/O routines

#define BLOCKLEN  8192

extern unsigned char ib[],ob[];
extern int ibl,ibf,obl;
extern U32B icnt,ocnt,totalsize;

#define getbyte() (ibl>0?(--ibl,ib[ibf++]):(bread(),(ibl>0?--ibl,ib[ibf++]:-1)))
#define putbyte(c) {ob[obl++]=(c);if(obl==BLOCKLEN)bwrite();}
#define flush() bwrite()

#define CRCCALC         1     /* flag to setinput/setoutput */
#define PROGDISP  2     /* flog to setinput/setoutput */

extern void (*outspecial)(unsigned char *obuf, unsigned oblen);
extern unsigned (*inspecial)(unsigned char *ibuf, unsigned iblen);

void setoutput(int fh, int mode, char *name);
void setinput(int fh, int mode, char *name);
U32B getcrc(void);
void clearcrc(void);
void bread(void);
void bwrite(void);

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