91 lines
3.2 KiB
C
91 lines
3.2 KiB
C
/*------------------------------------------------------------------------
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* Copyright 2007-2010 (c) Jeff Brown <spadix@users.sourceforge.net>
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*
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* This file is part of the ZBar Bar Code Reader.
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*
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* The ZBar Bar Code Reader is free software; you can redistribute it
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* and/or modify it under the terms of the GNU Lesser Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* The ZBar Bar Code Reader is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser Public License for more details.
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*
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* You should have received a copy of the GNU Lesser Public License
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* along with the ZBar Bar Code Reader; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*
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* http://sourceforge.net/projects/zbar
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*------------------------------------------------------------------------*/
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#ifndef _EAN_H_
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#define _EAN_H_
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/* state of each parallel decode attempt */
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typedef struct ean_pass_s {
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signed char state; /* module position of w[idx] in symbol */
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#define STATE_REV 0x80 /* scan direction reversed */
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#define STATE_ADDON 0x40 /* scanning add-on */
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#define STATE_IDX 0x3f /* element offset into symbol */
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unsigned width; /* width of last character */
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unsigned char raw[7]; /* decode in process */
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} ean_pass_t;
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/* EAN/UPC specific decode state */
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typedef struct ean_decoder_s {
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ean_pass_t pass[4]; /* state of each parallel decode attempt */
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zbar_symbol_type_t left; /* current holding buffer contents */
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zbar_symbol_type_t right;
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int direction; /* scan direction */
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unsigned s4, width; /* character width */
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signed char buf[18]; /* holding buffer */
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signed char enable;
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unsigned ean13_config;
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unsigned ean8_config;
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unsigned upca_config;
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unsigned upce_config;
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unsigned isbn10_config;
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unsigned isbn13_config;
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unsigned ean5_config;
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unsigned ean2_config;
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} ean_decoder_t;
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/* reset EAN/UPC pass specific state */
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static inline void ean_new_scan (ean_decoder_t *ean)
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{
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ean->pass[0].state = ean->pass[1].state = -1;
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ean->pass[2].state = ean->pass[3].state = -1;
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ean->s4 = 0;
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}
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/* reset all EAN/UPC state */
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static inline void ean_reset (ean_decoder_t *ean)
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{
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ean_new_scan(ean);
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ean->left = ean->right = ZBAR_NONE;
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}
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static inline unsigned ean_get_config (ean_decoder_t *ean,
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zbar_symbol_type_t sym)
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{
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switch(sym) {
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case ZBAR_EAN2: return(ean->ean2_config);
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case ZBAR_EAN5: return(ean->ean5_config);
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case ZBAR_EAN8: return(ean->ean8_config);
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case ZBAR_UPCE: return(ean->upce_config);
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case ZBAR_ISBN10: return(ean->isbn10_config);
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case ZBAR_UPCA: return(ean->upca_config);
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case ZBAR_EAN13: return(ean->ean13_config);
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case ZBAR_ISBN13: return(ean->isbn13_config);
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default: return(0);
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}
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}
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/* decode EAN/UPC symbols */
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zbar_symbol_type_t _zbar_decode_ean(zbar_decoder_t *dcode);
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#endif
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