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/*
* CJet: LaserJet emulation for Canon CaPSL III+ laser printers
* Copyright (C) 1996 Michael Huijsmans
* Email: mgh@sbox.tu-graz.ac.at
*
* 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, 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
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 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.
*
*
* pjl.c - check for and ignore (for now) PJL sequences
*
*/
#include "cjet.h"
/*
* later model HP printers add a "Printer Job Language"
* PJL commands are of the form "@PJL bla bla bla [CR]LF"
*/
/*
* A '@' was detected in the input stream. Check for the string "PJL":
* if "PJL" was found, ignore everything up to the next LF
* else print the pending '@' and any read characters.
*/
void CheckPJL(void)
{
int p, j, l;
p = get_next_char();
if (p == 'P') {
j = get_next_char();
if (j == 'J') {
l = get_next_char();
if (l == 'L') { /* yes. @PJL found. now ignore it */
do {
p = get_next_char();
} while (p != LF);
} else { /* print "@PJ" */
translate('@');
translate('P');
translate('J');
unget_char(l); /* put back last character */
}
} else { /* print "@P" */
translate('@');
translate('P');
unget_char(j); /* put back last character */
}
}
else {
translate('@');
unget_char(p); /* put back last character */
}
}
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