68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
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/*
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* Copyright (C) 1996-1998 Szeredi Miklos
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* Email: mszeredi@inf.bme.hu
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version. See the file COPYING.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include "compr.h"
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void compr(void)
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{
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int j, c, lc, lled, rep, num;
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rep = 0;
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c = compr_read_byte();
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lc = 0;
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num = 0;
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while(c >= 0) {
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if(lc == 0xED) lled = 1;
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else lled = 0;
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lc = c;
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c = compr_read_byte();
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if(c == lc && num != 255 && (!lled || rep)) {
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if(!rep) {
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num = 1;
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rep = 1;
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}
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num++;
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}
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else {
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if(rep) {
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if(num < 5 && lc != 0xED) for(j = 0; j < num; j++) compr_put_byte(lc);
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else{
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compr_put_byte(0xED);
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compr_put_byte(0xED);
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compr_put_byte(num);
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compr_put_byte(lc);
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num = 0;
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}
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rep = 0;
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}
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else compr_put_byte(lc);
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}
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}
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compr_put_byte(0x00);
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compr_put_byte(0xED);
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compr_put_byte(0xED);
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compr_put_byte(0x00);
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}
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