code128.h

00001 /*------------------------------------------------------------------------
00002  *  Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
00003  *
00004  *  This file is part of the ZBar Bar Code Reader.
00005  *
00006  *  The ZBar Bar Code Reader is free software; you can redistribute it
00007  *  and/or modify it under the terms of the GNU Lesser Public License as
00008  *  published by the Free Software Foundation; either version 2.1 of
00009  *  the License, or (at your option) any later version.
00010  *
00011  *  The ZBar Bar Code Reader is distributed in the hope that it will be
00012  *  useful, but WITHOUT ANY WARRANTY; without even the implied warranty
00013  *  of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  *  GNU Lesser Public License for more details.
00015  *
00016  *  You should have received a copy of the GNU Lesser Public License
00017  *  along with the ZBar Bar Code Reader; if not, write to the Free
00018  *  Software Foundation, Inc., 51 Franklin St, Fifth Floor,
00019  *  Boston, MA  02110-1301  USA
00020  *
00021  *  http://sourceforge.net/projects/zbar
00022  *------------------------------------------------------------------------*/
00023 #ifndef _CODE128_H_
00024 #define _CODE128_H_
00025 
00026 /* Code 128 specific decode state */
00027 typedef struct code128_decoder_s {
00028     unsigned direction : 1;     /* scan direction: 0=fwd/space, 1=rev/bar */
00029     unsigned element : 3;       /* element offset 0-5 */
00030     int character : 12;         /* character position in symbol */
00031     unsigned s6;                /* character width */
00032 
00033     unsigned config;
00034     int configs[NUM_CFGS];      /* int valued configurations */
00035 } code128_decoder_t;
00036 
00037 /* reset Code 128 specific state */
00038 static inline void code128_reset (code128_decoder_t *dcode128)
00039 {
00040     dcode128->direction = 0;
00041     dcode128->element = 0;
00042     dcode128->character = -1;
00043     dcode128->s6 = 0;
00044 }
00045 
00046 /* decode Code 128 symbols */
00047 zbar_symbol_type_t _zbar_decode_code128(zbar_decoder_t *dcode);
00048 
00049 #endif
00050